Production of PAG road slabs.

Smooth airfield slab PAG 18 A800

The vast majority of public and paramilitary airfields in the Soviet Union were built using PAG 14, PAG 18 and PAG 20 slabs measuring 6x2 meters. This special types coverings made of high-strength concrete with a cross-section of 140, 180 and 200 mm, reinforced steel reinforcement. PAGs were also used at large-scale vehicle stops, during the development of northern territories and for the creation of industrial sites. As a rule, after the collapse of the USSR, the need for airfield slabs was provided by the market for secondary reinforced concrete products, but today the need for new and high-quality panels capable of carrying the loads of megacities has increased.

Hence the need arose to create a modern standard for the production of airfield slabs - GOST 25912-2015. Fresh state standard describes the quality requirements for advanced materials. In the catalog of the Kompleks-S company you will find all formats of airfield slabs and you can order delivery of massive structures to the site. Traditionally, PAGs are slabs of significant weight that can withstand colossal temporary loads, taking the impact of landing an aircraft or other equipment. The high demand for PAG 14 raised the question optimal combination price and quality, complete price list 2017 you can find it in the catalog "Reinforced Concrete Products Directory".

New GOST 25912-2015 defines the production of pre-stressed reinforced concrete slabs PAG, which are formed from heavy grade concrete and are recommended for prefabricated prefabricated airfield pavements, road construction, folding sites, and hangars. Factory-made PAG 18 A800 boards are resistant to harsh conditions of temperature and humidity in cold climates and permafrost zones. All slabs are tested for strength, rigidity and crack resistance, moisture resistance and fire resistance. Prices for PAG 14, PAG 18 and PAG 20 are based on the consumption of steel and concrete; you can always find out the current cost on the pages of "Complex-S".

Also, the GOST standard changed the procedure for marking PAG, where it included new characteristics of fittings.

A600 - for reinforcing steel of classes A600, At600, At600S and A600S;
A800 - for reinforcing steel of classes At800 and A800;
K7 - for reinforcing ropes of types K7 and K7T with a tensile strength of at least 1770 N/mmGOST 25912-2015.

Before you buy PAG slabs. Facts.

Modern concrete road slabs are used everywhere, sometimes due to the poor quality of asphalt pavements, sometimes due to the need to build reliable transport networks. Reinforced concrete road slabs allow you to connect various points with a high-strength, reliable highway that ensures dynamics and continuity of communication. Among road concrete slabs, the most durable ones stand out most clearly - PAG, which were originally used for the construction of airfield runways. Today, the range of use of airfield slabs has expanded significantly - a huge amount of multi-ton transport has begun to be transported on Russian roads, and large industrial facilities need durable storage and transportation sites. The use of PAG board in construction is largely justified by its durability and ability to withstand extremely high loads. Airfield runways, temporary and permanent surfaces of city roads and industrial enterprises need materials that are resistant to stress and climatic conditions. Among slab reinforced concrete products PAG slabs differ the most high performance strength, rigidity, crack resistance. In addition, depending on the selected concrete composition, airfield concrete slabs cope well with any climatic conditions.

PAG-14 slabs and PAG-18 are recommended for the construction of coatings for permanent and temporary airfields, city roads and areas with a working load of up to 75 tons per square meter. The stoves operate in all regions of Russia with design temperatures down to – 60 °C. The working surface of the slabs must have a corrugation formed by the manufacturing form.

PAG board marking

The current GOST 25912-2015 assumes simple marking of road slabs. First, the type of product is indicated, then the thickness of the slabs in centimeters is noted. Then the type of prestressing reinforcement used is characterized. Also, the slab grade may include the index “.1” - in the case of using 10 prestressing rods in PAG slabs; Additionally, a digital index may be indicated indicating the diameter of the prestressing rods (ropes) used, the number of which is determined by the design of the slabs.

For example, consider PAG-14 A600-1(6000x2000x140 mm), where:

PAG – smooth airfield slab;
14 – thickness 140 mm;
A600 – class of used reinforcement;
1 - use of 10 prestressing rods in PAG slabs;

The surface of the slab must indicate the brand, weight, production date and QC stamp.

Purpose and cost of PAG-14, PAG 18, PAG 20.

The use of concrete slab PAG 18 A800 has a number of advantages, the main of which is considered to be a significant extension of the service life and increased stability of the roadway. From the developer’s point of view, applying PAG means making a serious investment in savings in terms of subsequent road repairs and maintenance. Often, PAG 18 A800 slabs are in excellent condition after just a few uses, which is why the secondary sale market for road slabs is active. High-strength prestressed slabs are used repeatedly, so buy PAG slabs means successfully investing in a durable object.

Airfield road slabs PAG - design

Any concrete road slabs are divided into products for temporary and permanent roads. There are no mounting brackets on the "temporary" slabs, so there are no special openings on the slabs themselves. Among the many forms of slabs, airfield slabs are often produced rectangular in the same size; only the thickness of the slabs varies, which is why the popular sizes are PAG-14, PAG-18 and PAG-20. The thickness of the slabs is 140, 180 and 200 mm, respectively. The production of prestressed slab products at modern enterprises is carried out according to GOST 25912.0-91. Each concrete road slab has its own characteristics and laying methods during the construction of the roadway.

PAG slab dimensions

GOST 25912-2015 establishes the standard slab size 6x2 meters is the main standard size for modern construction. Along with any concrete products of a high degree of responsibility concrete slabs PAGs comply with strict GOST standards. Certification of slabs and tests for strength, rigidity and crack resistance, control loads are considered mandatory (maximum control load for slabs of the PAG type is 8800 kgf).

The slab sample must withstand test loads without loss of strength, shape or other deformations. As a rule, when producing a slab, a certain safety margin is taken into account, which should “save” the product under slight overloads. Technologists of modern reinforced concrete structures strictly monitor the quality of concrete and reinforcement products. PAG slabs are made from selected concrete mixtures, which are supplemented with additives to increase resistance to freezing and humidity. In the 21st century, the precast concrete industry can boast of unique PAG slabs, which are distinguished by their smoothness, density and resistance to chemical corrosion.

The quality of PAG concrete slabs is assessed according to a number of technical requirements of GOST. Experts evaluate not only the quality of the concrete surface (corrugations), the depth of the pattern and clarity (deviations of no more than 1 mm), on the surface of the PAG 18 A800 concrete slabs there should be no cavities wider than 15 mm, no sagging, and the slab surface should not have cracks wider than 1 mm. The edges of the slab should not be rounded (no more than 20 mm on the non-working side). High quality slabs You can buy PAG with delivery from the Kompleks-S company; from us you can order products for road construction, produced according to your adjustments. Prices for PAG slabs directly depend on the consumption of concrete, steel, type of reinforcement and the current cost of energy. In our “Concrete Concrete Products Directory” we are pleased to offer you an attractive price list for road slabs with delivery.

Production of PAG road slabs

To organize airfield and road surfaces slabs of a special design 6x2 meters are used with reinforcement with high-class stressed steel. Speed and reliability of constructed canvases and platforms from PAG slabs directly depends on the quality of execution. New road slabs have different endurance indicators, which GOST 25912-2015 will tell you in more detail, which you can download for free in the “GOSTs and SNiPs” section of the website. Our clients in Kemerovo, Surgut, Norilsk, Kazan, Murmansk, Voronezh use the delivery services of concrete products from Complex-S.

The production of reinforced concrete airfield slabs is carried out in several ways - cassette (bench) and aggregate-flow. Today there are also more modern methods production of PAG slabs– vibration forms. To obtain a durable and durable slab, use heavy grades of concrete M300, M350, M400 ( average density concrete 2200-2500 kg/m3). The compressive strength of concrete is not less than B25. Crushed stone can be used as a filler. But the main strength and reliability of the slabs is given by steel reinforcement. To obtain rigidity and high load-bearing capacity, the PAG 18 A800 slab is reinforced with stressed metal reinforcement in the form of rods made of steels A-V, A-IV, At-IV. The thickness of the protective concrete layer to the reinforcement of airfield slabs is strictly controlled (at least 2 cm or more). Also, the internal steel frames of the product undergo preliminary anti-corrosion treatment.

In production, the frame of the rods is filled with a mixture of concrete and molded. The finished “semi-finished product” is dried and steamed. Incorporated into concrete to improve resistance negative temperatures and freezing, plasticizers are introduced. These additives contribute to the resistance of finished airfield slabs to cracking when low temperatures, which can reach – 40 ̊С. That is why, during systematic freezing and ice, which are typical for the Russian climate, concrete airfield slabs PAG 18 A800 remain strong. With us you can buy PAG slabs according to GOST, the price for which remains stably at an affordable level.

So that airfield concrete slabs can be combined into a single sheet, loops are installed when laying them in the mold. These same steel hinges become mounting hinges when loading and unloading products.

Characteristics and prices for PAG in Russia

When builders are faced with the need to organize a site for storing equipment and materials taking into account high pressure, best solution –buy PAG slabs. They are characterized by high endurance and durability, and if necessary, they can be easily dismantled and used in another facility. Economic feasibility The use of prefabricated concrete sheets lies on the surface - it is speed, low cost, mobility, high factory readiness. PAG 18 A800 slabs can be produced with different indicators of waterproofness and frost resistance, depending on the requirements of specific projects. The need for precise selection of characteristics, on the one hand, allows the customer to receive PAG airfield slabs that are ideal for their facility, and on the other hand, save on the absence of unnecessary characteristics.

Modern megacities and developing cities, be it Yekaterinburg or Krasnodar, Vladivostok or Kemerovo, need high-quality materials and slab products..

Aviation plate PAG 18 A800 has a rough working surface, which is obtained by treating a wet slab with nylon brushes. The slab also has corrugations with a depth of at least 1.5 mm, which ensures adhesion of the wheels to the surface of the slabs. GOST 25912-2015 defines the frost resistance of concrete from F100 to F200, but today builders prefer to use products with high resistance to temperature changes. The cost of the PAG slab will also depend on the class of reinforcement used; GOST 25912-2015 suggests many types of reinforcing steel that can give different load-bearing capacity indicators. To more clearly carry out the calculation of the PAG slab, you need to familiarize yourself with the reference table of the series.

It is profitable to buy a PAG - compare price and reliability

Ordering and purchasing special road slabs for airfields is simple with the “Reinforced Concrete Products Directory” from the Kompleks-S company. It’s easy to save money with us by ordering PAG concrete slabs with delivery throughout Russia. Our specialists will help you choose the best offer for the cost of products for your region, and also guarantee fast and careful delivery to the gates of your facility.

Subsequent laying and installation of PAG 18 A800 slabs is quite simple and requires minor preparation of the base. In addition, modern industry is trying to optimize prices for PAG boards and adapt physical indicators For different regions Russia. Plant technologists provide guaranteed quality products according to GOST 25912-2015, providing correct work slabs for bending. Aviation concrete slabs are quite massive - the weight of the PAG 18 A800 slab is 5400 kg.

PAG slabs must withstand constant mechanical loads from the significant weight of transport and special equipment, but in addition to this, the slab must also withstand shocks, vibrations and vibrations that are associated with the takeoff and landing of aircraft, and the movements of various equipment. In addition, high-quality plates according to PAG 18 A800 must cope with thermal changes, since during the acceleration of the aircraft a temperature contrast with the external environment is formed. The scope of application of PAG slabs can be called all climatic regions of Russia, use for the installation of airfields, highways, construction of helicopter platforms, as well as warehouses and industrial facilities. Used PAG slabs are used for laying roads and access roads, constructing parking lots and parking lots, warehouses and logistics facilities, and for installing tower cranes.

Airfield slabs PAG - prefabricated stressed slabs 6x2 meters of resistant concrete are produced in accordance with GOST 25912-2015. Separate standards for each standard size of slabs - PAG 14 are issued in accordance with GOST 25912.1-91, PAG 18 in accordance with GOST 25912.2-91. The section “GOSTs and SNiPs” will tell you more about the reinforcement of aircraft slabs, where you can download the 2015 standard.

To increase the strength, PAG 18 A800 slabs are reinforced with very durable steel rods with a diameter of 10 to 12-14 mm, this helps reduce the risk of cracks in the structure and reduces the possibility of sagging and rupture of the slab. Slabs use both prestressed and non-prestressed reinforcement to create the shape of the slab.

After finishing the molding of the PAG 18 A800 slab, it is moved to the warehouse using special gripping mechanisms. Upon reaching the tempering strength, the airfield road slabs are ready for shipment to the customer. The slabs are stored in warehouses with the obligatory use of gaskets and linings made of wood with a thickness of at least 3 cm.

In Moscow, St. Petersburg, Krasnoyarsk, Sochi, you will not experience any problems with the express purchase of reinforced concrete products, and for residents of the regions, we recommend ordering delivery through our logistics system. When purchasing slabs from the Kompleks-S company, the customer must receive a technical passport of the product, which indicates:

Manufacturer;
Production date;
Number of products in a batch;
Concrete grade for strength and compressive strength;
Tempering strength of concrete;
Class of reinforcement used;
Type of anti-corrosion protection;
Frost resistance and water resistance of concrete.

Transportation and storage of slabs

Quite heavy (about 5-6 tons) airfield slabs PAG 18 A800 are stored in stacks, and it is necessary to use wooden spacers and linings. The height of the stack is determined according to the mass of the slabs. Transportation of heavy slabs is carried out in a horizontal position with reliable fixation. Delivery of slabs throughout Russia will be provided by experienced drivers of the Kompleks-S company.

INTERSTATE COUNCIL FOR STANDARDIZATION. METROLOGY AND CERTIFICATION

INTERSTATE

STANDARD

Pre-stressed reinforced concrete slabs for airfield pavements

Specifications

Official publication

Rtiiform 2015 stand

Preface

The goals, basic principles and basic procedure for work on interstate standardization are established by GOST 1.0-92 “Interstate standardization system. Basic provisions" and GOST 1.2-2009 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for development, adoption, application. updates and cancellations"

Standard information

1 DEVELOPED by the Research Institute of Concrete and Reinforced Concrete named after. A.A. Gvozdev OJSC "Research Center "Construction"

2 8NESSEN Technical Committee for Standardization TC 465 “Construction”

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Minutes dated February 27, 2015 No. 75-P)

Multiple name of the country according to MK (ISO 3166) 004-97	Country code according to MK (ISO 3166)004-97	Abbreviated name of the national standardization body
		Ministry of Economy of the Republic of Armenia
Belarus		State Standard of the Republic of Belarus
Kazakhstan		Gosstandart of the Republic of Kazakhstan
Kyrgyzstan		Kyrgyzstaidvrt
		Moldova-Standart
		Rosstaidart
Tajikistan		Tajikstandard

4 By Order of the Federal Agency for Technical Regulation and Metrology dated April 3, 2015 No. 217-st, the interstate standard GOST 25912-2015 was put into effect as a national standard Russian Federation from July 1, 2015

5 INSTEAD GOST 25912.0-91. GOST 25912.1-91, GOST 25912.2-91, GOST 25912.3-91, GOST 25912.4-91

Information about changes to this standard is published in the annual information index “National Standards”, and the text of changes and amendments is published in the monthly information index “National Standards*”. In case of revision (replacement) or cancellation of this standard, the corresponding notice will be published in the monthly information index “National Standards”. Relevant information, notices and texts are also posted information system public use- on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet

In the Russian Federation, this standard cannot be reproduced in whole or in part. replicated and distributed as an official publication without permission from the Federal Agency for Technical Regulation and Metrology

INTERSTATE STANDARD

Pre-stressed reinforced concrete slabs for airfields

COATINGS

Specifications

Prestressed reinforced concrete slabs for aerodrome pavement. Specifications

Date of introduction - 2015-07-01

1 Application area

This standard applies to prestressed reinforced concrete slabs, made from heavy concrete and intended for the construction of quickly assembled prefabricated coverings of airfields, roads, storage areas, including those recommended for use in severe conditions of temperature and humidity conditions in cold climates and permafrost soils.

2 Normative references

8 of this standard uses regulatory references to the following interstate standards:

GOST 5781-82 Hot rolled steel for reinforcement reinforced concrete structures. Specifications

GOST 6727-80 Cold-drawn low-carbon steel wire for reinforcement of reinforced concrete structures. Specifications

GOST 7473-2010 Concrete mixtures. Specifications

GOST 8568-77 Steel sheets with rhombic and lenticular corrugation. Technical specifications GOST 10060-2012 Concrete. Methods for determining frost resistance GOST 10178-85 Portland cement and Portland slag cement. Technical specifications GOST 10180-2012 Concrete. Methods for determining strength using control samples GOST 10181-2014 Concrete mixtures. Test methods

GOST 10884-94 Reinforcing steel thermomechanically strengthened for reinforced concrete structures. Specifications

GOST 10922-2012 Reinforcement and embedded products, their welded, knitted and mechanical connections for reinforced concrete structures. General technical conditions

G OST 13015-2012 Reinforced concrete and concrete products for construction. General technical requirements. Rules for acceptance, marking, transportation and storage GOST 14192-96 Marking of cargo

GOST 17624-2012 Concrete. Ultrasonic method for determining the strength of GOST 18105-2010 Concrete. Rules for monitoring and assessing strength

GOST 22362-77 Reinforced concrete structures. Methods for measuring the tensile force of reinforcement GOST 22690-88 Concrete. Determination of strength mechanical methods non-destructive testing

GOST 23732-2011 Water for concrete and mortars. Technical specifications GOST 23858-79 Welded butt and tee connections for reinforced concrete structures. Ultrasonic quality control methods. Acceptance rules

Official publication

GOST 24211 -2008 Additives for concrete and mortars. General technical conditions GOST 26433.0-85 Accuracy assurance system geometric parameters in construction. Rules for performing measurements. General provisions

GOST 26433.1-89 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. Factory-made elements

GOST 26633-2012 Heavy and fine-grained concrete. Specifications

GOST 27006-86 Concrete. Rules for selecting concrete composition

GOST 31108-2003 General construction cements. Specifications

GOST 31384-2008 Protection of concrete and reinforced concrete structures from corrosion. General technical requirements

Note - When using this standard, it is advisable to check the validity of the reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or in the annually published information index “National Standards”, which was published as of January 1 of the current year , and according to the monthly information indexes published in the current edition. If the reference standard is replaced (changed), then when using this standard you should be guided by the replacing (changed) standard. If the reference standard is canceled without replacement, then the provision in which a reference to it is given applies to the part not affecting this reference.

3 Terms and definitions

This standard uses the terms GOST 13015 and GOST 18105.

4 Types, parameters and sizes

4.1 Plates are designated by marks consisting of alphanumeric groups separated by a hyphen. The first group contains the abbreviated letter name of the slab - PAG (airfield slab

smooth).

In the second group, the thickness of the slab in centimeters and the characteristics of the prestressed longitudinal reinforcement are given:

A600 - for reinforcing steel of classes A600. AtbOO. AtbOOS and A600S:

A800 - for reinforcing steel of classes At800 and A800:

K7 - for reinforcing ropes of types K7 and K7Ts with a temporary resistance of at least 1770 N/mm 2.

In the third group they give:

The index is not given in the case of using 12 prestressing rods on slabs: PAG-14. PAG-18 and 14 prestressing rods in the PAG-20 slab.

In the fourth group they give:

A digital index indicating the diameter of the prestressing rods (ropes) used, the number of which is determined by the design of the slabs, for example:

Index “-1” - in case of using prestressed reinforcement 012 mm.

Index “-2” - in case of using prestressed reinforcement 016 mm:

The index is not given when using prestressed reinforcement 014 mm. Examples of slab symbols:

18 cm thick with prestressed longitudinal reinforcement class A600 with a diameter of 14 mm:

14 cm thick with prestressed reinforcement class A800 with a diameter of 12 mm in the amount of 10 pcs.:

PAG-14A800.1-1.

4.2 Main parameters and dimensions

4.2.1 Plates are divided into types: PAG-14. PAG-18 and PAG-20 - depending on their thickness - 140.180 and 200 mm, respectively.

4.2.2 The shape and main dimensions of the slabs must correspond to those shown in Figures 1-4.

a) Shape iosioe"*!* dimensions of the PAG-14 plate (aspobmlp-mdr!iroa"and design* of parts<з/д) для ПАГ-МА800 1-1)

Figure 1

For PAG-18 For PAG-20

Plate PAG-18 3-3

GOST 25912-2015

b) Shape and basic dimensions of PAG-18 and PAG-20 slabs

Figure 1, sheet 2

Figure 1. sheet 3

t - slab thickness Figure 2

t - dark mounting product M1|M1a) or M3 (MZa). J is the thickness of the slab, the length of the slab PAG>14 is indicated in parentheses. M1a and MEL -> marking zta for PAG-14A800.Y and PAG-16A800>1

When urinating

1 On the longitudinal edges of the slabs, it is allowed to install recesses with dimensions of 20 × 100 * 200 mm to ensure the possibility of lifting the slabs using automatic grippers.

2 in slabs with inclined longitudinal edges, mounting and butt products M1 (M1 a) or ME (MZa) (Figures 1 and 3) are installed flush with the plane defining overall size slab width. - 2000mm.

Figure 3

1 - with I-shaped product M2 (M2o) or M4 (M4o); 2 - ciuKoooe product M4a; М2е and М4о - marsiroooyaa z/d for PAG-14A800.1"1 and

PAG.18A800-1

Figure 4

4.2.3 By agreement with the customer, it is possible to manufacture slabs with a profile of longitudinal edges. different from those shown in Figure 2 (sections 6-6). with the dimensions of openings for assembly-butt products and the distance from the edge of the casting to the assembly-butt products, different from those shown in Figures 1 and 3. and with assembly-butt products of a different design, provided that the operational qualities of the airfield pavement are ensured.

4.2.4 The slabs are made with the working surface (upper surface of the airfield pavement) “down”.

The working surface of the slabs must have corrugation, formed by using a steel sheet with rhombic corrugation in accordance with GOST 8568 as the bottom of the pallet. The sheet is placed on the pallet as follows. so that the large diagonal of the rhombus is perpendicular to the longitudinal axis of the slab (Figure 5).

The depth of the corrugation must be at least 1.5 mm. By agreement with the customer, it is possible to produce slabs with a corrugation depth of at least 1.2 mm.

4.2.5 Reinforcement of slabs is carried out:

In the longitudinal direction - prestressed reinforcement.

In the transverse direction - non-stressed reinforcement.

4.2.6 As prestressing reinforcement for slabs, bar reinforcing steel of classes A800 and A600, reinforcing ropes of types K7 and K7T with a tensile strength of at least 1770 N/mm 2 are used. Prestressed reinforcement should be used in the form of whole bars or strands without joints.

Non-prestressing reinforcement must be made of reinforcing steel of class B500C. A500C. A400. A240 and reinforcing wire of class VR-1.

4.2.7 Designs of PAG-14 slabs. PAG-18 and PAG-20. reinforced with prestressed bar reinforcement are given in Appendix A. Slab structures with different reinforcement should be developed in accordance with the requirements of this standard.

Assembly-butt, reinforcement products, options for permanent anchors of prestressed reinforcement, their shape and dimensions are given in Appendix B.

f - corrugation of the working surface of the plate Figure 5

5 Technical requirements

5.1 Plates are manufactured in accordance with the requirements of this standard and approved in in the prescribed manner technological documentation containing requirements for the manufacture of slabs.

Boards intended for use in aggressive environments should be designed and manufactured taking into account the requirements of GOST 31384.

5.2 Plates must be manufactured in forms that ensure compliance with the quality and accuracy requirements established by this standard geometric dimensions slabs

5.3 Before starting production, the new forms involved must be tested for operational loads with the actual stress of the longitudinal working reinforcement to determine the deformation of the form and a possible change in the specified prestress of the rods.

5.4 Requirements for concrete

5.4.1 Slabs should be made of heavy concrete that meets the requirements of GOST 26633 for airfield pavement concrete.

5.4.2 The actual strength of concrete must correspond to the required strength, assigned according to GOST 18105, depending on the standardized strength of concrete (class of tensile strength in bending and class of compressive strength, transfer and tempering strength) and on the characteristics of the actual uniformity of concrete strength.

5.4.3 Slabs must be made of concrete of a tensile strength class in bending not lower than B tb 4.0 and a compressive strength class not lower than VZO.

5.4.4 The standardized transfer and tempering compressive strength of concrete must be at least 70% of the concrete class.

5.4.5 The abrasion of concrete in accordance with GOST 13015 should be no more than 0.7 g/cm2. It is allowed, with appropriate justification, to set abrasion to no more than 0.6 g/cm 2 .

5.4.6 The frost resistance of concrete slabs must be at least P 2,200.

5.4.7 In the presence of aggressive media (sulfates, chlorides and others), additional requirements for concrete are assigned in accordance with GOST 31384.

5.4.8 To prepare concrete, Portland cement “PTs400” should be used. PC500 according to GOST 10178. Portland cement" CEMI. TsEM I according to GOST 31108 based on clinker of a standardized composition containing tricalcium aluminate (C A A) in an amount of no more than 7% by weight and Portland cement for concrete airfield pavements according to current standards 1).

5.4.9 Plasticizing and air-entraining (gas-forming) additives must comply with GOST 24211.

5.4.10 Water for creation concrete mixture must meet the requirements of GOST 23732.

5.4.11 The selection and designation of concrete composition should be carried out in accordance with GOST 27006.

5.5 Requirements for reinforcement and assembly-butt products

5.5.1 The shape and dimensions of reinforcement and assembly-butt products are given in Appendix B of this standard.

5.5.2 Welded ones must meet the requirements of GOST 10922.

5.5.3 Grades of reinforcing steel of classes A400 and A240. as well as grades of carbon steel of ordinary quality used for the manufacture of assembly and butt products must correspond to the grades established by the design documentation of a particular structure and be specified when ordering slabs.

5.5.4 Reinforcing steel must meet the requirements:

Classes At800, AtbOOS and AtbOO - GOST 10864:

Class A800. A600, A400 and A240 - GOST 5781;

Classes B500C, A500C - valid regulatory documents 2 ’;

For reinforcing ropes of types K7 and K7T - to the current regulatory documents;

For reinforcing wire of class 8p-1 - GOST 6727.

5.6 Tension of prestressing reinforcement

5.6.1 Tension of the prestressed longitudinal reinforcement of the slab should be carried out mechanically or electrothermally.

5.6.2 The heating temperature of prestressed reinforcement using the electrothermal method of tensioning it should not exceed 450 °C.

5.6.3 The stress values in the prestressing reinforcement, monitored upon completion of its tensioning on the stops before concreting, are determined by the design for the coating based on the calculated load-bearing capacity of the coating and its constituent slabs.

The required stress in working bars is determined by the class of reinforcing steel and stress technology and is accepted for reinforcement classes:

At800 and A800 - 590 MPa (6000 kgf/cm 2):

At800 and A800 - 700 MPa (7200 kgf/cm 2 for PAG-14A800.1-1 and PAG-18A800-1 slabs);

AtbOO. AtbOOS and A600S - 530 MPa (5400 kgf/cm2).

The tension in the reinforcing ropes during their use is determined when developing a design for slab structures.

Deviations in stress values in prestressed reinforcement should not exceed 10%.

5.7 Production of reinforced concrete slabs for airfield pavements

5.7.1 Laying the concrete mixture into a mold during the manufacture of slabs is carried out when the temperature difference between the mold tray and the concrete mixture is no more than 20 °C.

5.7.2 The mode of heat treatment of the slabs must comply with the technological documentation and ensure the achievement of the required strength and other characteristics of concrete. The actual maximum temperature measured by sensors embedded in the concrete slab should be no higher than 60 °C. and the heating rate is no more than 12 °C per hour. The cooling rate of products should not exceed 20 °C/h.

5.7.3 When manufacturing slabs in heated molds, heating of the structures must be uniform, the temperature difference between the lower and upper surfaces should not exceed 15 C.

5.7.4 When removing slabs from the steaming chamber, the temperature difference between the surface of the slabs and the surrounding air should not exceed 20 °C.

5.7.5 Transfer of compression force to concrete (tension release of prestressing reinforcement) should be carried out after the concrete slab reaches the required transfer strength (see 5.4.4).

5.8 Requirements for the accuracy of slab manufacturing

5.8.1 Actual deviations of the geometric parameters of the slabs should not exceed the limits specified in Table 1.

Table 1

Type of deviations of the geometric parameter	Geometric parameter	Limit about g toyon iv. mm
Deviation from linearity	Plate length
no size	Slab width
	Slab thickness

	Dimensions of holes for assembly-butt products Displacement of assembly-butt products;
	Along the edge of the slab
	Perpendicular to the slab edge
	According to the height of the slab
Deviation from straight	Straightness of surface profile and side edges:
linearity	In any section not 2 m long
	Along the entire length of the slab
Deviation from plane	Flatness work surface slabs (measured from
bones	conventional plane passing through three extreme points)
Deviation from lane	Perpendicularity of adjacent end faces of slabs in the area
pendicularity	length, mm:


Deviation from equality of diagonal lengths	The difference in the lengths of the diagonals of the working surface of the plate

5.8.2 Actual deviations of the thickness of the protective layer of concrete to the reinforcement from the nominal values given in Appendix A should not exceed ±3 mm.

5.8.3 The ends of the prestressing reinforcement should not protrude beyond the end surfaces of the slabs by more than 5 mm.

5.9 Requirements for the quality of surfaces and appearance of slabs

5.9.1 The working surface of the slabs should not have cracks.

Shrinkage and technological cracks with a width of more than 0.05 mm and a length of more than 50 mm are not allowed on the non-working surface and side faces of the slabs.

5.9.2 Peeling of concrete is not allowed on the working surface of the slabs.

5.9.3 The dimensions of cavities, local bulges and depressions on the concrete surface and around the concrete edges of the slabs should not exceed the values specified in Table 2.

Table 2

Poaorchiosg slabs	Limit sizes, mm
	Rakoiii	Local heights (height) and depressions (tlubiia)	Concrete trenches
	Depth	Local heights (height) and depressions (tlubiia)		Total length per 1 m ribs

Non-working and side faces

5.9.4 Correcting defects on the working surface and sealing trenches in slab ribs are not allowed.

5.9.5 The side faces of the lower and upper surfaces of the slabs, as well as the open surfaces of the assembly and joint products must be cleared of concrete deposits.

6 Acceptance rules

6.1 Acceptance of slabs is carried out in batches in accordance with the requirements of GOST 13015 and this standard.

The batch volume should not exceed 200 pcs.

6.2 Acceptance of slabs is carried out based on the results:

Acceptance tests - in terms of concrete strength indicators (classes of tensile strength in bending and compressive strength, transfer and tempering strength), compliance of reinforcement and installation-butt products, thickness of the protective layer of concrete to the reinforcement, accuracy of geometric parameters, surface quality and the appearance of the slabs, according to the crack resistance of the lower and upper zones of the slab:

Periodic testing - in terms of frost resistance and abrasion of concrete.

6.3 A batch of slabs in terms of their strength and rigidity is accepted if the requirements established by this standard for a set of standardized and design indicators are met. characterizing the strength of concrete, the thickness of the slab, the diameter and location of the reinforcement, the thickness of the protective layer of concrete before the reinforcement, the main parameters of reinforcement and installation-butt products, the tension of prestressed reinforcement, the physical and mechanical properties of reinforcing steel, which are checked during the incoming, operational and acceptance control in in accordance with GOST 13015.

6.4 Acceptance control of concrete strength (based on the results of testing concrete samples or non-destructive methods) is carried out in accordance with GOST 18105.

Determination of the tensile strength of concrete in bending, as well as the compressive strength of concrete at the design age (see 5.4.2) is carried out only from samples.

6.4.1 Control of the transfer and tempering compressive strength of concrete non-destructive methods carried out on three plates in accordance with GOST 22690 and GOST 17624.

Concrete strength control is carried out in at least five areas on the side faces of the slab in the middle and at a distance of 30-40 cm from the corner.

6.5 Frost resistance and abrasion of concrete slabs are determined at least once every 6 months. as well as when the slab manufacturing technology changes, the source materials and the composition of the concrete mixture used for the preparation of concrete change.

6.6 Acceptance of reinforcement and assembly-butt products is carried out before installing them in the mold in accordance with GOST 10922 and GOST 23858.

6.7 Acceptance of slabs in terms of accuracy of geometric parameters, thickness of the protective layer of concrete to reinforcement, surface quality, controlled by measurements, should be carried out based on the results of selective one-stage control.

Acceptance of slabs based on the presence of assembly and joint products, cleaning of their open surfaces and slab edges from concrete deposits, the presence of concrete peeling and grease stains on the working surface of the slab, and the correct application of markings and signs is carried out based on the results of continuous inspection.

6.8 When accepting slabs based on the crack resistance of their lower and upper zones, one slab is selected for testing from each batch of slabs that meets the requirements of this standard in other respects.

It is allowed to use for testing a slab that has cavities, local sagging and chips of concrete, the dimensions of which exceed those allowed by this standard (see 5.9.3) by no more than twice, and other defects that do not affect the strength of the slabs.

The slab is considered to have passed the test if, at the control load specified in 7.8.4. no cracks will be detected on the surface of the test area and the side edges upon careful inspection through a magnifying glass with fourfold magnification.

If the results of the crack resistance test are unsatisfactory in at least one zone, an additional test of two slabs of this batch is carried out. If at least one of two slabs does not pass the test, then all slabs in this batch are subjected to testing, and only slabs that pass the test are subject to acceptance.

By agreement with the consumer, testing of slabs for crack resistance may be carried out not from each batch, but from more slabs and at other times depending on the volume of their production, but at least once a month.

6.9 Based on the acceptance results, a document is drawn up on the quality of the supplied slabs in accordance with GOST 13015.

Additionally, the quality document must contain:

Concrete grade for frost resistance:

Class of reinforcing steel used as longitudinal prestressing reinforcement (At800. A800. AtbOO. A600S. A600 or rope type K7);

Reinforcing steel grades of classes A240-A500. B500C. A500C;

Reinforcing wire of class VR-1 and grades of carbon steel of ordinary quality, from which assembly and butt plates are made.

7 Control methods

7.1 The strength of concrete when tested using samples is determined according to GOST 10180 on a series of samples made from a concrete mixture of the working composition and stored under conditions in accordance with GOST 18105.

Determination of the actual transfer and tempering compressive strength of concrete when testing by non-destructive methods in slabs (see 6.4) is carried out using the ultrasonic method according to GOST 17624 and methods according to GOST 22690.

7.2 Frost resistance of concrete slabs for concrete airfield pavements should be determined in accordance with GOST 10060.

7.3 The quality indicators of the concrete mixture are checked according to GOST 10181 with frequency in accordance with GOST 7473.

7.4 Methods for monitoring reinforcement and assembly-butt products - according to GOST 10922.

7.5 Methods for controlling the starting raw materials used for the manufacture of boards must comply with established standards or specifications for these materials.

7.6 Measurement of controlled stress in prestressed longitudinal reinforcement - according to GOST 22362.

7.7 Dimensions, deviations from the straightness of the profile, the flatness of the slab, the perpendicularity of adjacent faces, the thickness of the protective layer of concrete to the reinforcement, the position of assembly-butt products, as well as quality concrete surfaces And appearance slabs are checked using the methods established by GOST 26433.0 and GOST 26433.1.

7.8 Control of crack resistance of slabs

7.8.1 Testing of slabs for crack resistance of the lower zone should be carried out according to scheme A shown in Figure 6. Testing of slabs for crack resistance of the upper zone is carried out according to scheme A or scheme B shown in Figure 6.

7.8.2 Testing of slabs after heat treatment (with the tempering strength of concrete) should be carried out no earlier than 4 hours and no later than 2 days.

7.8.3 First, the slab is tested for the crack resistance of the lower zone, and then the same slab is tested for the crack resistance of the upper zone. When testing the slab for crack resistance of the upper zone according to scheme A. shown in Fig. 6. After testing the lower zone, the slab is turned over.

The loading of the slab during testing is carried out in stages. The load share of each stage should be no more than 10% of the reference load, and the last two stages should be no more than 5%.

After applying each stage of the control load, the slab is kept under load for at least 10 minutes. and after applying the full test load - at least 30 minutes.

7.8.4 The values of the control load for testing the crack resistance of the slab are given in Table 3.

1 - test plate. 2 - load on the width of the slab; 3 - wooden beams village 10 10cm; 4 - lignified bypass I

Note - Dimensions in brackets refer to testing schemes for PAG-18 and LAG-20 slabs.

Figure 6

Table 3

	Test load. kN (is). by testing the cracked bone of a slab with concrete strength corresponding to the tempering strength (see 5.4.4). when tested according to the scheme




PAG-18A800-1

PAG-14A800.1
PAG-14A800-1
LAG-14A800.1-1
LAG-14A600.1
LAG-14A600-1

8 Marking

8.1 Marking of slabs must comply with the requirements of GOST 13015 and this standard.

8.2 Markings are applied on the side longitudinal edge of the slab.

Markings must contain:

Slab brand (see section 4);

Trademark or short name of the manufacturer;

Technical control stamp:

Date of manufacture of the slab.

8.3 On the longitudinal edges of the slab, at a distance of 1 m from the end, an installation sign is applied: “Place of support”*.

8.4 The manufacturer’s mark must be applied to the working surface of the slab, the designation and method of application of which are agreed upon with the customer and indicated in the contract for the supply of slabs.

9 Transportation and storage

9.1 Transportation and storage of slabs should be carried out in accordance with the requirements of GOST 13015 and this standard.

9.2 The slabs should be transported and stored in a horizontal position.

9.3 The height of the stack of slabs during transportation is set depending on the carrying capacity of vehicles and the permissible loading dimensions, but not more than the height of the stack of slabs during their storage (see 9.8).

9.4 Loading of slabs and their fastening during transportation on open railway rolling stock (gondola cars, platforms) should be carried out in accordance with the requirements of Appendix 14 to the Agreement on International Rail Freight Transport “Rules for stowing and securing cargo in wagons and containers”.

The approximate consumption of wire with a diameter of 6 mm for fastening slabs on a train is 1.2 kg per 1 m 3 of transported slabs.

Transport marking - according to GOST 14192.

9.5 Loading, transportation, unloading and storage of slabs should be carried out in compliance with the measures. eliminating the possibility of damage to the slabs.

The slabs should be transported to vehicles with reliable fastening, eliminating longitudinal and transverse displacement of the plates, as well as their mutual collision and friction during transportation.

9.6 During transportation and storage, the bottom slabs should be supported on wooden pads, and spacers should be placed between the slabs along the height of the stack. Pads and gaskets should be placed at a distance of 1 m from the end of the slab, perpendicular to its long side and vertically one above the other. The thickness of wooden linings with a rigid base must be at least 50 mm. and with a soil base - at least 100 mm. The thickness of the gaskets is at least 20 mm.

9.7 Loading and unloading operations with gripping assembly-butt products should be carried out one slab at a time. It is prohibited to lift two or more slabs by grasping the mounting joints of the lower slab.

When using special rigging devices that operate without gripping assembly-butt products, the number of plates in the lifted package should not exceed three.

9.8 The slabs should be stored in warehouses in stacks, sorted by brand and batch. It is allowed to stack no more than 10 slabs in height.

Appendix A (reference)

Designs of slabs PAG-14, PAG-18 and PAG-20

A.1 Designs of PAG-14 slabs

A.1.1 Technical parameters of the slabs are given in Table A.1.

Table A.1

Brand llmgy	Prestressed* longitudinal reinforcement on	Concrete strength class		Slab volume, m*	Consumption of fittings for ppmtu. kg
		tensile bending	for compression		Tensile	Unstressed
PAG-14A800-1
PAG-14A600.1	1O014AT6OOS
PAG-14A800-1
PAG-14A600-1	12012AT6OOS
PAG-14A800.1-1

Notes

Above the line - theoretical with a specified length of prestressing reinforcement bars equal to 6000 mm:

Below the line - taking into account the outlets of the prestressed reinforcement for its tightening during tension using the electrothermal method, the length of which is taken to be 6250 mm and 63S0 mm for the PAG-14A800.1-1 slab.

Additional metal consumption for the manufacture of anchors for temporary fastening of prestressed reinforcement on the mold stops is 2.0 kg per slab.

2 Consumption of prestressing reinforcement and total consumption The reinforcement on the slab is specified taking into account the actual length of the prestressing reinforcement, which is accepted depending on the method of tensioning the reinforcement and the design of the gripping devices.

A.1.2 Reinforcement of slabs with prestressed longitudinal reinforcement with a diameter of 14 mm must correspond to that shown in Figure A.1. slabs with prestressed longitudinal reinforcement with a diameter of 12 mm - in Figure A.2 or A.Z.

A.1.3 the upper and lower reinforcing mesh C1 and C1A should be secured with brackets K1 (pos. J6 *).

The middle mesh C2 is secured by interweaving with prestressed longitudinal reinforcement (section E-E) or K4 staples with a diameter of 3 mm. installed along the length of the mesh every 100 cm and three rows along its width every 80 cm.

A.1.4 Nominal thickness of the protective layer of concrete before the reinforcement, mm:

23 - for mesh rods C1 and C1A;

27 - for mesh rods C2.

GOST 25912-2015

longitudinal prestressed into reinforcement bars

Figure A.1

Figure A.2

Figure A.Z

A.1.5 Specifications for reinforcement and assembly and joint products of PAG-14 slabs. as well as a sample of reinforcement steppe per slab are given in Table A.2.

Table A.2

Reinforcement and assembly-butt products	Number of products per slab
Reinforcement and assembly-butt products	Number of products per slab		Total length, m	Weight, kg


Assembly and butt products
Assembly and butt products
Spiral (pos. * 15)
Bracket K1 (lane 16)
For plate PAG-14A800.1-1 (Figure AZ)
Grid S1A		28А500С(В500С)

Assembly and butt products
Assembly and butt products
Spiral (pos. 15)
internal crimped anchor
Bracket K1 (pos. 16)
Notes 1 In PAG-14A800-1 slabs with prestressed longitudinal reinforcement with a diameter of 12 mm, the number of spirals (item 15) per slab is 24 pcs. 2 When fastening the mesh C2 with K4 staples, their number per slab is 18. Steel consumption is 0.22 kg per slab. 3 When using reinforcing steel of class At400C, its diameter and consumption of steel should be taken the same as reinforcing steel of class A400. 4 By agreement with the consumer, it is possible to replace mounting and butt products M2 with M2a. M2v or M2b according to Appendix B or for products of another design, provided that the performance of the airfield pavement is ensured.

A.1.6 Reinforcement and assembly-butt products are given in Appendix B. A.2 Designs of PAG-18 slabs

A-2.1 Technical indicators of PAG-18 slabs are given in Table A.Z.

Table A.3

Stove brand	Tensile longitudinal	Concrete strength class		Volume of concrete per slab, m*	Consumption of reinforcement for the slab, yag
		tensile bending	ia compression		Tensile	Unharnessed

	12014AT6OOS
PAG-18A800-1

Notes

1 The consumption of prestressing reinforcement and the total consumption of reinforcement per slab are given:

Above the line - theoretical with a conventional length of prestressed reinforcement bars, torn 6000 mm:

Below the line - taking into account the release of prestressed reinforcement for its capture during tension using the electrothermal method, the length of which is taken to be 6230 mm and 6350 mm for the PAG-16A800-1 slab.

Additional metal consumption for the manufacture of anchors for temporary fastening of prestressed reinforcement on the mold stops is 2.4 kg per slab.

A.2.2 Reinforcement of PAG-18 slabs must correspond to that shown in Figure A.4 or A.5. It is allowed to place two middle rods of longitudinal prestressing reinforcement with a distance between them in the range of 350-450 mm.

A.2.3 the upper and lower reinforcing mesh SZ and SZA should be secured with brackets K2 (pos. 17).

The middle mesh C4 is secured by weaving with prestressed longitudinal reinforcement according to Figures A.4 and A.5 or with staples K5. installed along the length of the mesh every 100 cm and in three rows along its width every 80 cm.

A.2.4 Nominal thickness of the protective layer of concrete before the reinforcement, mm.

32 - for lower and upper prestressing reinforcement:

21 - for mesh rods SZ and SZA:

27 - for mesh rods C4.

) - prestressed reinforcement Figure A.4

Figure A.Z

A 2.5 The specification of reinforcement and assembly-butt products, as well as LAG-18, is given in Table A.4.

Table A.4

Reinforcement and assembly-butt products	Number of products per league	Sampling reinforcing steel onto the slab
Reinforcement and assembly-butt products	Number of products per league		Total length, m	Weight, kg




Assembly and butt products


Spiral (vine. GB)
Bracket K2 (vine G 7)
For plate PAG-18A800-1 (Figure A.5)

Grid WITH FOR		28А500С(В500С)

Assembly and butt products



Spiral (vine. GB)
Internal crimped anchor
Bracket K2 (Line 17)
Notes
1 By agreement with the consumer, it is possible to replace M4 mounting and butt products with M4a. M4v or
M4b according to Appendix B or for products of another design, subject to ensuring performance
airfield pavement.
2 When fastening the C4 mesh with KS brackets, their number per slab is 15. The steel consumption for them is 0.22 kg per

A-2.6 Reinforcement and assembly-butt products are given in Appendix B.A.3 Design of the PAG-20 slab

A.3.1 Technical indicators of PAG-20 slabs are given in Table A.5 Table A.5

Stove brand	longitudinal reinforcement on the slab	Concrete strength class		Slab volume, m 3	Reinforcement consumption per slab, kg
		in tension and bending	for compression		Tensile	Unstressed
	144314 At 800 144314 AZ 00
	14014AT6OOS
Notes 1 The consumption of prestressing reinforcement and the total consumption of reinforcement per slab are given: Above the line - theoretical with a conventional length of prestressing reinforcement bars equal to 6000 mm.

End of TVBPIA A.5

Below the line - taking into account the outlets of the prestressed reinforcement for its capture during tension, the length of which is taken to be 6250 mm (for the electrothermal method).

The additional consumption of metal for the manufacture of anchors for temporary fastening of prestressed reinforcement on the mold stops is 2.0 kg per slab.

2 The consumption of prestressing reinforcement and the total consumption of reinforcement per slab are specified taking into account the actual length of prestressing reinforcement, taken depending on the method of tensioning the reinforcement and the design of the gripping devices.

A.3.2 Reinforcement of PAG-20 slabs must correspond to that shown in Figure A.6.

A.3.3 The upper and lower nets SZ should be secured with KZ brackets (pos. 18).

Medium CS meshes are secured by interweaving with prestressed longitudinal reinforcement according to Figure A.4 (sections 3-3) or secured with brackets Kb. installed along the length of the mesh every 100 cm and in three rows along its width every 80 cm.

A.3.4 Nominal thickness of the protective layer of concrete before the reinforcement, mm:

32 - for lower and upper prestressed longitudinal reinforcement:

21 - for SZ mesh rods:

27 - for mesh rods C5.

When securing the CS mesh by interweaving it with interlocking reinforcement, the thickness of the protective layer to the SZ mesh rods is determined based on the diagram shown in Figure A.4 (section 3-3).

A.3.5 The specification of reinforcing and assembly-butt products, as well as the selection of reinforcing steel for the slab are given in Table A.6.

Table A.b

Reinforcement and assembly-butt products	Number of products per pliga	Sampling reinforcing steel onto the slab
Reinforcement and assembly-butt products	Number of products per pliga		Weight, kg




Assembly and butt products
Assembly and butt products



Spiral (pos. 15)
Short circuit bracket (pos. 18)

Note - When fastening CS grids with Kb staples with a diameter of 3 mm (item b), their number per slab is 15. The steel consumption for them is 0.22 kg per slab.

A.Z.b Reinforcement and assembly-butt products are given in Appendix B.

Appendix B (for reference)

Reinforcement and assembly-butt products of slabs

B.1 The shape and dimensions of assembly and butt products are shown in Figures B.1 and B.2. reinforcement products must correspond to those shown in Figures B.Z-6.5.

Figure B.1

S1 and SZ

Travel along the bridge
Travel along the bridge


	100 to 44 ■4400

Spiral

e - Dimensions for M4 and M46 are indicated in brackets

Figure B.Z

Sis"

Figure B.4

Figure B.5

B.2 The specification and selection of reinforcing steel for reinforcing and assembly-butt products are given in Tables B.1 and B.2.

Table B.1

Dpiia. mm	Total length, m	Election steel for the product
Dpiia. mm	Total length, m		Weight, kg

End of TVBPIY S. 1

Mars products	Length, mm	Total length, m	Sampling of steel for the product
Mars products	Length, mm	Total length, m		Weight, kg

















Internal crimped anchor

Notes

1 V reinforcing mesh SE is allowed to replace rods pos. b 1O0YuA4OO on 1S08A4OOC with a pitch of rods in the mesh of 50 mm.

2 When using AMOOS class reinforcing steel in meshes, its diameter, length and steel consumption should be taken as the same as A400 class reinforcing steel.

Table B2

Length, mm	Total length, m	Sampling of steel for the product
Length, mm	Total length, m		Weight, kg

End of Table S.2

Length, mm	Total length, m	A sample was sent to the product
Length, mm	Total length, m



















5) Compressed oDoma Figure B.6 Note - It is allowed to manufacture butt products M2 and M4 without vines. 25. if the method used for fastening these products in the mold ensures their design position in the slab. Bibliography (1) Rules for stowing and securing cargo in wagons and containers (Appendix 14 to the Agreement on International Freight Transport by Rail (SMGS)) UDC 691.328.2:006.354 MKS 91.080.40 Keywords: prestressed slabs, airfield pavements, reinforced concrete structures, dimensions Editor S.O. Slyshvmkov Technical editor V.N. Prusakova Corrector EM. Dulmeva Computer layout P.A. Circular Delivered for recruitment on 05/19/2015. Signed and stamped 06/11/2015. Format 60"64>£ Armal typeface. Uel. oven l. 4.16. Uch *iad. l. 3.60. Circulation 34 eo. Zach. 2131. Published and printed by the Federal State Unitary Enterprise "STANDARTINFORM". 123996 M( p GOST 55224-2012 is in force on the territory of the Russian Federation. GOST R 52544 and GOST R 53772 are in force on the territory of the Russian Federation. longitudinal prestressing reinforcement bars

Reinforced concrete products and structures
St. Petersburg

[email protected]

Airfield plates PAG-14, PAG-18

Airfield plate is a reinforced concrete structure with prestressed reinforcement, which has great strength, reliability and durability.

Description:
Decryption example:
Characteristics and price:

Airfield smooth slabs PAG-14 (6x2m), GOST 25912.0-91, GOST 25912.1-91, GOST 25912-2015.

PAG-14IV

PAG– smooth airfield slab;
14
IV– prestressed longitudinal reinforcement of class At-IV, with a diameter of 12 mm.

Description:
Decryption example:
Characteristics and price:

Airfield smooth slabs PAG-18 (6x2m), GOST 25912.0-91, GOST 25912.2-91, GOST 25912-2015.

They are used for constructing prefabricated pavements for airfields, roads for high-tonnage vehicles, construction sites, road surfaces for the movement of special equipment, as well as for the construction of roads to constructed objects, with a working instantaneous load of up to 75 tons. per sq.m., in areas with a design temperature of up to minus 60°C.

PAG-18V

PAG– smooth airfield slab;
18 – thickness of the slab in centimeters;
V– prestressed longitudinal reinforcement of class At-V, with a diameter of 14 mm.

Note:

Attention! Rosstandart signed an order (dated April 3, 2015) on the introduction for voluntary use in the Russian Federation GOST 25912-2015 “Prestressed reinforced concrete slabs for airfield pavements. Specifications" . The new standard was adopted to replace the previously existing GOST 25912.0-91, GOST 25912.1-91, GOST 25912.2-91, GOST 25912.3-91, GOST 25912.4-91, and came into force from July 1, 2015.

The object of standardization of this GOST is prestressed reinforced concrete slabs PAG, made of heavy concrete and intended for the installation of prefabricated prefabricated airfield pavements. The standard regulates the conditions of their use, designs and main dimensions, technical requirements, control methods, as well as rules for acceptance, transportation and storage.

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REINFORCED CONCRETE PLATES
PRE-STRESSED PAG-14
FOR AIRPORT COVERINGS

DESIGN

GOST 25912.1-91

STATE CONSTRUCTION COMMITTEE OF THE USSR

Moscow

STATE STANDARD OF THE USSR UNION

Pre-stressed reinforced concrete slabs PAG-14 FOR AERODROME COVERINGS

Design

Reinforced concrete prestressed slabs
R AG-14 for aerodrome pavement.

Structure

GOST
25912.1-91

Date of introduction 01.01.92

This standard applies to prestressed reinforced concrete slabs PAG-14 with plan dimensions 6´ 2 m and 14 cm thick, made of heavy concrete and intended for the construction of prefabricated airfield pavements, and establishes the design of these slabs.

1. Shape of slabs - according to GOST 25912.0.

2. Technical indicators of the slabs are given in table. 1.

3. The slabs must meet all requirementsGOST 25912.0and this standard.

4. Reinforcement of slabs with prestressed longitudinal reinforcement with a diameter of 14 mm must correspond to that shown in Fig. 1, slabs with prestressed longitudinal reinforcement with a diameter of 12 mm - on the drawing. 2.

5. The upper and lower reinforcing mesh C1 should be secured with brackets K1 (pos. 16 ).

Medium meshes C2 are secured by interweaving with prestressed longitudinal reinforcement (section. 3 - 3 ) or K4 staples with a diameter of 3 mm, installed along the length of the mesh every 100 cm and in three rows along its width every 80 cm.

6. Nominal thickness of the protective layer of concrete before the reinforcement:

32 mm - for lower and upper prestressed longitudinal reinforcement;

23 mm - for mesh rods C1;

27 mm - for mesh rods C2.

Table 1

Stove brand	Prestressed longitudinal reinforcement on the slab	Concrete strength class		Volume of concrete per slab, m3	Reinforcement consumption per slab, kg
		tensile bending	for compression		Tensile	Unstressed	Total
PAG-14 V	10 Æ 14 AtV 10 Æ 14 AV	B btb 3,6	B25	1,68	72,6 75,6	70,4	143,0 146,0
PAG-14 IV	10 Æ 14AtIVC 10 Æ 14AtIV 10 Æ 14AIV
PAG-14V-1	12 Æ 12AtV 12 Æ 12AV				64,0 66,6	70,6	134,6 137,2
PAG-14 IV -1	12 Æ 12AtIVC 12 Æ 12AtIV 12 Æ 12AIV

Notes:

1. The consumption of prestressing reinforcement and the total consumption of reinforcement per slab are given:

above the line - theoretical with a conventional length of prestressing reinforcement bars equal to 6000 mm;

below the line - taking into account the outlets of the prestressing reinforcement for its capture during tension, the length of which is taken to be 6250 mm.

Additional metal consumption for the manufacture of anchors for temporary fastening of prestressed reinforcement on the mold stops is 2.0 kg per slab.

2. The consumption of prestressing reinforcement and the total consumption of reinforcement per slab are specified taking into account the actual length of prestressing reinforcement, taken depending on the method of tensioning the reinforcement and the design of the gripping devices.

When securing the C2 mesh by interweaving it with prestressed reinforcement, the thickness of the protective layer of concrete up to the C2 mesh rods is determined based on the diagrams shown in Fig. 1 and 2 (sec. 3 - 3 ).

7. The specification of reinforcing and assembly-butt products, as well as a selection of reinforcing steel for the slab are given in Table. 2.

8. Reinforcement and assembly-butt products - in accordance with GOST 25912.4.

1 - prestressed reinforcement; 2 - fastening grids C1

Crap. 1

1 - prestressed reinforcement; 2 - fastening grids C1

Crap. 2

Table 2

Reinforcement and assembly-butt products	Number of products per slab	Sampling reinforcing steel onto the slab
Reinforcement and assembly-butt products	Number of products per slab	Section	Total length, m	Weight, kg
Grid C1		Æ 8AIII Æ 5VrI	47,52 6,48	18,80 0,92
Grid C2		Æ 5VrI	245,44	35,34
Assembly and butt products		Æ 20AI Æ 10AI	3,20 2,00	7,92 1,24
Assembly and butt products		Æ 16AI Æ 5VrI	2,56 1,80	4,04 0,28
Spiral (pos. 15 )		Æ 3ВрI	25,00	1,30
Bracket K1 (pos. 16 )		Æ 5VrI	3,52	0,51

Notes:

1. In slabs with prestressed longitudinal reinforcement with a diameter of 12 mm, the number of spirals (pos. 15 ) on the stove - 24.

2. When fastening C2 grids with K4 staples, their number per slab is 18, steel consumption is 0.22 kg per slab.

3. When using reinforcing steel of class At-III C, its diameter and steel consumption should be taken the same as reinforcing steel of class A-III.

4. By agreement with the consumer, it is allowed to replace M2 assembly and butt products with M2a or M2b in accordance with GOST 25912.4 or with products of a different design, provided that the operational qualities of the airfield pavement are ensured.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Defense

developers

B. I. Demin, Ph.D. tech. Sciences (topic leader); V. A. Dolinchenko, Ph.D. tech. sciences; N. B. Vasiliev, Ph.D. tech. sciences, K.D. Zhukov; V. M. Skubko

2. APPROVED AND PUT INTO EFFECT Resolution of the State Construction Committee of the USSR dated March 12, 1991 No. 8

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION

INTERSTATE

STANDARD

Pre-stressed reinforced concrete slabs for airfield pavements

Specifications

Official publication

Standardinform

Preface

Standard information

1 DEVELOPED by the Research Institute of Concrete and Reinforced Concrete named after. A.A. Gvozdeva OJSC "Research Center "Construction"

2 INTRODUCED by the Technical Committee for Standardization TC 465 “Construction”

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (protocol dated February 27, 2015 Np 75-P)

Information about changes to this standard is published in the annual information index * National Standards, and a number of changes and amendments are published in the monthly information index “National Standards”. In case of revision (replacement) or cancellation of this standard, the corresponding notice will be published in the monthly information index “National Standards”. Relevant information, notifications and texts are also posted in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet

In the Russian Federation, this standard cannot be fully or partially reproduced, replicated and distributed as an official publication without permission from the Federal Agency for Technical Regulation and Metrology

GOST 25912-2015

f - corrugation of the working surface of the plate

Figure 5

5 Technical requirements

5.1 The slabs are manufactured in accordance with the requirements of this standard and duly approved technological documentation containing the requirements for the manufacture of slabs.

Plates intended for use in aggressive environments should be designed and manufactured taking into account the requirements of GOST 31384.

5.2 The slabs must be manufactured in forms that ensure compliance with the requirements established by this standard for the quality and accuracy of the geometric dimensions of the slabs.

5.4 Requirements for concrete

5.4.1 Slabs should be made of heavy concrete that meets the requirements of GOST 26633 for airfield pavement concrete.

5.4.2 The actual strength of concrete must correspond to the required strength, assigned according to GOST 18105 depending on the standardized strength of concrete (class of tensile strength in bending and class of compressive strength, transfer and tempering strength) and on the characteristics of the actual uniformity of concrete strength.

5.4.3 Slabs must be made of concrete of a tensile strength class in bending not lower than B 1b 4.0 and a compressive strength class not lower than BZO.

5.4.4 The standardized transfer and tempering compressive strength of concrete must be at least 70% of the concrete class.

5.4.5 The abrasion of concrete in accordance with GOST 13015 should be no more than 0.7 g/cm 2. It is allowed, with appropriate justification, to set abrasion to no more than 0.6 g/cm 2 .

5.4.6 The frost resistance of concrete slabs must be at least F 2,200.

5.4.7 In the presence of aggressive media (sulfates, chlorides and others), additional requirements for concrete are assigned in accordance with GOST 31384. 8

GOST 25912-2015

1 Scope of application...................................................1

3 Terms and definitions...................................................2

4 Types, parameters and sizes............................................2

5 Technical requirements...................................................8

6 Acceptance rules...................................................11

7 Control methods...................................................12

8 Marking......................................................... 14

9 Transportation and storage...................................................14

Appendix A (informative) Designs of PAG-14 slabs. PAG-18 and PAG-20......15

Appendix B (for reference) Reinforcement and assembly-butt products of slabs..................................25

Bibliography.........,...................................31

INTERSTATE STANDARD

Pre-stressed reinforced concrete slabs for airfields

COATINGS

Specifications

Prestressed reinforced concrete slabs for aerodrome pavement. Specifications

Date of introduction - 2015-07-01

1 Application area

This standard applies to prestressed reinforced concrete slabs made from heavy concrete and intended for the construction of quickly constructed prefabricated pavements for airfields, roads, and storage areas, including those recommended for use in severe conditions of temperature and humidity conditions in cold climates and permafrost soils.

This standard uses normative references to the following interstate standards:

GOST 5781-82 Hot-rolled steel for reinforcement of reinforced concrete structures. Specifications

GOST 6727-80 Cold-drawn low-carbon steel wire for reinforcement of reinforced concrete structures. Specifications

GOST 7473-2010 Concrete mixtures. Specifications

GOST 8568-77 Steel sheets with rhombic and lentil corrugation. Technical specifications GOST 10060-2012 Concrete. Methods for determining frost resistance GOST 10176-85 Portland cement and Portland slag cement. Technical specifications GOST 10180-2012 Concrete. Methods for determining strength using control samples GOST 10181-2014 Concrete mixtures. Test methods

GOST 10884-94 Reinforcing steel thermomechanically strengthened for reinforced concrete structures. Specifications

GOST 10922-2012 Reinforcement and embedded products, their welded, knitted and mechanical connections for reinforced concrete structures. General technical conditions

GOST 13015-2012 Reinforced concrete and concrete products for construction. General technical requirements. Rules for acceptance, marking, transportation and storage GOST 14192-96 Marking of cargo

GOST 17624-2012 Concrete. Ultrasonic method for determining the strength of GOST 18105-2010 Concrete. Rules for monitoring and assessing strength

GOST 22362-77 Reinforced concrete structures. Methods for measuring the tensile force of reinforcement GOST 22690-88 Concrete. Determination of strength by mechanical methods non-destructive testing

Official publication

GOST 24211 -2008 Additives for concrete and mortars. General technical conditions

GOST 26433.0-85 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. General provisions

GOST 26433.1-89 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. Factory-made elements

GOST 26633-2012 Heavy and fine-grained concrete. Specifications

GOST 27006-86 Concrete. Rules for selecting concrete composition

GOST 31108-2003 General construction cements. Specifications

GOST 31384-2008 Protection of concrete and reinforced concrete structures from corrosion. General technical requirements

Note - When using this standard, it is advisable to check the validity of the reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or according to the annually published information index “National Standards*, which was published as of January 1 of the current year , and according to the corresponding monthly information indexes published by this year. If the reference standard is replaced (changed), then when using this standard you should be guided by the replacing (changed) standard. If the reference standard is canceled without replacement, then the provision in which a reference to it is given applies to the part not affecting this reference.

3 Terms and definitions

This standard uses terms according to GOST 13015 and GOST 18105.

4 Types, parameters and sizes

4.1 Plates are designated by marks consisting of alphanumeric groups separated by a hyphen.

The first group contains the abbreviated letter name of the slab - PAG (airfield slab

smooth).

In the second group, the thickness of the slab in centimeters and the characteristics of the prestressed longitudinal reinforcement are given:

A600 - for reinforcing steel of classes A600. AtbOO, AtbOOS and A600S,

A800 - for reinforcing steel of classes At800 and A800.

K7 - for reinforcing ropes of types K7 and K7T with a tensile strength of at least 1770 N/mm 2.

In the third group they give:

The index is not given if 12 prestressing rods are used in slabs: PAM4. PAG-18 and 14 prestressing rods in the PAG-20 slab.

In the fourth group they give:

A digital index indicating the diameter of the prestressing rods (ropes) used, the number of which is determined by the design of the slabs, for example.

Index “-1” - in case of using prestressed reinforcement 012 mm.

Index “-2” - in case of using prestressed reinforcement 016 mm;

The index is not given when using prestressed reinforcement 014 mm.

Examples symbol slabs:

18 cm thick with prestressed longitudinal reinforcement class A600 with a diameter of 14 mm:

14 cm thick with prestressed reinforcement class A800 with a diameter of 12 mm in the amount of 10 pcs.:

PAG-14A800.1-1.

4.2 Main parameters and dimensions

4.2.1 The slabs are divided into types: PAG-14, PAG-18 and PAG-20 - depending on their thickness - 140.180 and 200 mm, respectively.

4.2.2 The shape and main dimensions of the slabs must correspond to those shown in Figures 1-4.

a) Shape and main dimensions of the PLG-14 slab (in brackets* - markings of embedded parts<з/д(для ПАГ-14А800 1-1 >Figure 1

GOST 25912-2015

For PAG-18

For PAG-20

PAG-18 3-3 plate

b) Shape and main dimensions of PAG-18 and PAG-20 slabs

Figure 1, sheet 2

GOST 25912-2015

Figure 2

1 - assembly and butt product M1 (M1a) or M3 (MZa). I is the thickness of the slab, the size for the PAG-14 slab is indicated in parentheses.

M 1a and MZa - marking Na for PAG-14A800.1-1 and PAG-18A800-1

Notes

1 On the longitudinal edges of the slabs, it is allowed to install recesses with dimensions of 20 * 100 * 200 mm to ensure the possibility of lifting the slabs using automatic grippers.

2 In slabs with inclined longitudinal edges, mounting and butt products M1<М 1а) или М3 (МЗа) (рисунки 1 и 3)устанавливают заподлицос плоскостью, определяющей габаритный размер ширины плиты. - 2000 мм.

Figure 3

GOST 25912-2015

1 - butt product M2 (M2v) or M4 (M4v); 2 - butt product M4a; M2v and M4v - marking z"d for PAG-14A800.1-1 and

PAG-18A800-1

Figure 4

4.2.3 By agreement with the customer, it is possible to manufacture slabs with a profile of longitudinal edges. different from those shown in Figure 2 (sections 6-6). with the dimensions of the openings for installation-butt products and the distance from the edge of the slab to the assembly-butt products, different from those shown in Figures 1 and 3. and with installation-butt products of a different design, provided that the operational qualities of the airfield pavement are ensured.

4.2.4 The slabs are made with the working surface (upper surface of the airfield pavement) “down”.

The working surface of the plates must have corrugation, formed by using a steel sheet with rhombic corrugation as the bottom of the pallet in accordance with GOST 8568. The sheet is placed on the pallet like this. so that the large diagonal of the rhombus is perpendicular to the longitudinal axis of the slab (Figure 5).

The depth of the corrugation must be at least 1.5 mm. By agreement with the customer, it is possible to produce slabs with a corrugation depth of at least 1.2 mm.

4.2.5 Reinforcement of slabs is carried out:

In the longitudinal direction - prestressed reinforcement.

In the transverse direction - non-stressed reinforcement.

4.2.6 Bar reinforcing steel of classes A800 and A600 is used as prestressing reinforcement for slabs. reinforcing ropes of types K7 and K7T with a tensile strength of at least 1770 N/mm 2 - Prestressed reinforcement should be used in the form of whole rods or strands without joints.

Non-prestressing reinforcement must be made of reinforcing steel of class B500C. A500C. A400. A240 and reinforcing wire of class VR-1.

Assembly-butt, reinforcement products, options for permanent anchors of prestressed reinforcement, their shape and dimensions are given in Appendix B. 7

INTERSTATE

STANDARD

Preface

1 Application area

2 Normative references

3 Terms and definitions

4 Types, parameters and sizes

For PAG-18 For PAG-20

Plate PAG-18 3-3

5 Technical requirements

6 Acceptance rules

7 Control methods

8 Marking

9 Transportation and storage

S1 and SZ

Spiral

Sis"

5) Compressed oDoma

Airfield plates PAG-14, PAG-18

PRIVACY POLICY