Road and airfield slabs. Road slabs, airfield slabs Road slabs 1p 30.18 30 weight

Rectangular reinforced concrete slab for covering urban roads ( 1P 30.18-30 ) – a high-strength slab made of heavy concrete, with powerful reinforcement, designed for the construction of prefabricated pavement for permanent and temporary city roads. The rectangular slab is designed for vehicle load N-30 and N-10 (vehicle tonnage).

Production standards and parameters of rectangular slabs for urban roads are specified in GOST 21924.1(2)-84 and GOST 21924.2-84.

The traditional material for producing heavy-duty slabs is heavy concrete with a density of 2500 kg/m3 (compressive strength class B30 and B22.5). This durable, wear-resistant cement concrete has proven its worth for many years. the best side as a material for road bases and coatings. The working (upper) surface of the road slab is corrugated to improve bonding with the asphalt applied on top and improve traction with vehicle wheels. Road slabs of short length (up to 3 meters) are produced unstressed. Reinforced reinforcement of the 1P 30.18.30 slab is made using non-stressed steel reinforcement class A-I, At-ShS, A-III welded into 2 meshes located at the top and bottom. Such reinforcement significantly increases not only the strength, but also the weight of the product up to 2200 kg.

The concrete grade for frost resistance and water resistance of a rectangular road slab (for temperatures up to minus 40 ° C) for permanent roads is F200 and W4, for temporary roads - F150 and W2.

The road slab has mounting loops located along the end faces (the loops do not protrude beyond the working surface of the slab edge), but upon agreement with the customer, slabs can be manufactured with holes for a collet grip or grooves for loopless installation.

Unlike asphalt, a rectangular slab can be used at a design temperature of up to minus 40 °C. At the same time, the concrete slab is ready for use immediately - in different weather conditions, at any time of the year. Currently, the slabs undergo anti-corrosion treatment, since when using chloride salts to combat icing road slabs are in difficult operating conditions.

Product marking

Plates are divided into two types according to their intended purpose:

1 - for permanent roads;
2 - for temporary roads;

The mark of a rectangular slab consists of alphanumeric groups separated by a hyphen. The first group contains the designation of the slab type (1 or 2) and its rounded dimensions in decimeters (length and width) and the calculated vehicle load in tons.

As an example, consider a rectangular slab of grade 1P 30.18-30 (3000x1750x170 mm), where:

Number - type intended for roads;
P – slab shape (rectangular);
Length and width in dm;
Letters - reinforcement class.

Markings must be present on the side and end faces of each road slab, along with the weight and date of manufacture of the product.

Product quality control

As with other reinforced concrete products, cracks in the concrete of road slabs should not be more than 5 per 1.5 m2 of the slab surface (permissible crack length 50 mm, width 0.1 mm). The basis for rejecting a product is even a slight exposure of the reinforcement, since during operation such areas will lead to rapid corrosion and destruction of the product.

The geometric parameters of the road slab 1P 30.18.30 should not deviate from the design by more than ±10 mm in length, ±4 mm in width and 10 mm in straightness (for temporary road slabs, the maximum deviation indicators are less strict). The tempering strength of concrete is 70% of the design strength, in winter time – 90%.

The corrugation of the surface of the road slab is a clear rhombic pattern, without edges, at least 1.0 mm deep and has a rough surface.

Concrete sinkholes and beads on the working side of a rectangular road slab should not be more than 15 mm. The dimensions of cavities, local beads and concrete edges on the surface of the slab should not exceed 10 mm. on work surface, 20 mm on non-working.

On acceptance tests control the following parameters of rectangular road slabs:

concrete strength (class of concrete in terms of compressive strength, tempering strength);
compliance of reinforcement and embedded products;
location of reinforcement and tension of prestressing reinforcement;
strength of welded joints;
thickness of the protective layer of concrete to the reinforcement;
accuracy geometric parameters;
quality of concrete surfaces.

P must accompany the batch of road slabs technical certificate , in which they indicate:

concrete grade in terms of strength and its average density;
tempering strength of concrete and actual tempering density of concrete;
concrete grade for frost resistance and water resistance;
water absorption of concrete;
date of manufacture of the slabs.

Storage and transportation

It is recommended to transport and store rectangular road slabs, like many other reinforced concrete products, in horizontal stacks. The stack height should not exceed 2 meters to avoid loss of stability. In warehouses, slabs for urban roads must be sorted by brand and batch. The bottom row of road slabs is stacked on a dense, carefully leveled base. Between rectangular concrete slabs and under them, gaskets are laid for a soil base with a thickness of at least 100 mm, and for a rigid base - at least 50 mm.

When loading and transporting, care should be taken to avoid the possibility of damage to road slabs. Therefore, it is not allowed to subject the slabs to drops, impacts or shocks during unloading.

Laying road slabs

Road slabs, based on the nature of their support on the base, are divided into:

to smooth ones with a flat surface resting continuously on the base;
with edge edges resting on the base with the entire surface, and edges cutting into the base on full height;
into coffered and ribbed ones, resting on the base with a ribbed surface;
to finely ribbed;
on lattice ones, resting on the base not only with the lower surface of the lattice elements, but when filling the slabs with dense material and inclined side edges of the holes;
on slabs, additionally resting their edges or corners on pads at the base.

It is not recommended to install road slab on the ground without a carefully compacted sand cushion. If you do not make a sand base, the service life of the slabs will be significantly reduced. Roads based on road slabs are immediately ready for use. When laying, it is worth considering the presence of expansion joints and compression joints, which are filled with elastic mastics. Subject to installation rules and permissible loads This coating will last for many years.

Stressed road slabs PDN are used for installation as road surfaces in places with difficult climatic conditions. Their purpose is to construct assembly pavements for both permanent and temporary roads under the H-30 vehicle load. PDN slabs are used for roads in areas with outside temperatures down to minus 55°C. Slabs with prestressed reinforcement are made of heavy concrete.
Geometric dimensions of the road slab PDN: 6000 2000 140 mm. Weight – 4.2 tons.
Every year, the requirements for the quality and versatility of modern road surfaces become higher. The construction business is developing, modern technologies, cargo equipment is also being improved, becoming more lifting and heavier. Therefore, the problem arises of preserving the roadway in a form suitable for further use. In this regard, road surface slabs began to be used everywhere for road construction.
Reinforced concrete road slabs are used to minimize time costs during road construction, as well as to give the road surface special strength. Road slabs are quite widely used in the military sphere in the construction of training grounds, where the road surface needs to withstand the heavy weight of armored and tracked vehicles. Today, concrete road slabs are simply indispensable assistant during the construction of runways at airfields, both military and civilian. Typically, one road slab weighs about two tons, but for example, airfield slabs can reach 5-6 tons.
The stressed road slab (PDN) is intended for the construction of road surfaces in places with difficult soil, hydrological and climatic conditions with the estimated air temperature of the coldest month down to minus 55 C. The road slab is widely used in the construction of roads with increased vehicle loads (for example, highways).
Due to the reinforced concrete content, PDN plate can withstand multi-ton loads. That is why the abbreviation PDN contains the letter “N”, that is, “tense”. Thus, the PDN slab is an improved road slab.
The racks are made of heavy concrete in accordance with GOST 26633. The concrete strength class is not lower than B27.5. In the process of manufacturing road slabs (PDN) they use special additives, which give the product improved quality indicators:
The waterproof grade of concrete is W6.
Calculated standard load on a wheel of a three-axle vehicle – 50 kN (5 tf).
For the reinforcement of the road slab, reinforcing steel of classes A-IV, A-V according to GOST 5781, classes At-IV, At-V according to GOST 10884 is used.

Rectangular road slabs 1P30-18-30 used for road construction. Reinforced concrete slabs - important component many construction projects and technical structures. No construction project is complete without road elements. It is necessary to lay road surfaces to new objects, for which they are well suited 1P30-18-30. These products allow for savings in the construction of houses due to free access of transport to the construction site. Since the slabs are made from reinforced high-quality concrete, the structures are highly durable and reliable.

Main scope of application.

Road slabs are used to construct roads. These are high-strength elements and can be used to organize both temporary and permanent road surfaces. Car tonnage is calculated as N-10 and N-30, road slab elements 1P 18-15-10 these loads can withstand, as they have a certain margin of safety. The main area of use is a component in city roads.

Unlike asphalt pavement, these reinforced concrete products 1P30-18-30 They last much longer without breaking or cracking. Due to high-quality raw materials, these plates can work in fairly “harsh conditions” environment. So the average estimated temperature in winter can reach up to -40 degrees. The slabs are placed on a special sand-crushed stone bedding, which eliminates the harmful effects of the alkaline soil environment on the products.

Rectangular 1P30-18-30 have a slight corrugation on the surface, so asphalt or other coating can be laid on top. The uneven surface ensures good adhesion of materials. Since chloride salts are actively used when icing the roadway, rectangular slabs must undergo a special chemical treatment, which significantly increases performance characteristics. Modern methods processing of building materials makes it possible to obtain ultra-strong and wear-resistant products.

Reinforced concrete road slabs 1P30-18-30 for covering city roads are massive shaped structures. One of the planes of the plate, which is in direct contact with the wheels of vehicles, is corrugated to achieve effective adhesion to the wheels of vehicles. Corrugation of road slabs is achieved by pouring concrete into a pallet, the bottom of which has a rhombic corrugation with a depth of at least 1 - 1.2 mm. After compaction concrete mixture At the manufacturing plant, the surface of the road slab is processed using nylon brushes or tarpaulin tape in order to obtain a rough working surface.

Being extremely important structural elements, road slabs 1P30-18-30 for covering city roads are made exclusively from heavy concrete medium density, reinforced with meshes of steel rods. Frost resistance and water resistance are increased with the help of plasticizing and air-entraining additives. The use of high-quality road slabs can be repeated, since used concrete slabs do not lose their characteristics.

Reinforced concrete road slabs 1P30-18-30 are manufactured for covering city roads as follows: two meshes of reinforcement are laid in a lubricated mold, which is then poured concrete mortar. To obtain concrete with increased rigidity, the water and cement content in the concrete mixture is reduced. As the solution is filled, it is compacted using vibration to obtain a product of increased density. The manufacturing process is completed by heating in a heat chamber. Life time concrete slabs increased by adding special fillers made of granite or crushed limestone to the concrete structure.

IN modern construction Road slabs 1P30-18-30 for covering city roads are replacing asphalt road surfaces. This is due to obvious advantages reinforced concrete products:

Excellent performance: durability and no need for repairs. Concrete roads have a lifespan of over forty years, while asphalt roads wear out within ten years. Moreover, during operation, concrete slabs do not require regular repairs, which are required for asphalt roads;
Ability to withstand significant loads. Concrete reinforced with steel reinforcement is by far the strongest building material therefore, unlike asphalt, road slabs do not deform under the weight of vehicles driven over them;
The strength of concrete gives road slabs another important advantage: resistance to temperature changes and precipitation. Unlike asphalt roads, concrete roads are not damaged or destroyed by extreme conditions, which can be caused by precipitation: showers, heavy snowfall, extremely high or low temperatures;
Vehicles moving around concrete road, consume 15-20% less fuel than when driving on an asphalt road. This occurs due to the fact that the road made of concrete slabs does not deform under the wheels of vehicles;
Less fuel consumption vehicles when driving on a concrete road, it can be concluded that the use of concrete slabs in road construction is more appropriate from an environmental point of view. In addition, when roads are paved with asphalt, severe air pollution occurs (the main component of asphalt, bitumen, is produced from natural petroleum derivatives);
Lightness and high speed laying concrete slabs. When using reinforced concrete road slabs, there is no need to wait several weeks until the road construction is completed - the coating can be used immediately after construction is completed. There is no need for heavy asphalt paving equipment;
Versatility is the main difference between road construction using the laying method reinforced concrete slabs. Slabs can be laid on almost any soil, which cannot be said about asphalting. When using concrete slabs, there is no need to prepare the base;
Saving natural resources: asphalt (bitumen) is made from oil, the reserves of which are decreasing, concrete (cement) - from available limestone.

In order to obtain high-quality road slabs 1P30-18-30 for urban road surfaces, during the production process it is necessary to take into account a number of other parameters that directly affect the characteristics of concrete and finished products: quality, composition, humidity, temperature and other properties of the components, compliance with the sequence their mixing, quality and mixing time, use of appropriate reinforcement, introduction of necessary additives to obtain the desired characteristics, compaction of concrete by vibration.

Reinforced concrete road slabs 1P30-18-30 for urban road surfaces are manufactured mainly with mounting loops. Less commonly, plates are made with grooves for loopless installation or holes for a collet grip.

Road slabs 1P30-18-30 for covering city roads must meet the requirements of GOST 13015.0:

according to the actual strength of concrete (at design age, tempering and transfer strength);
to the quality of materials used to prepare concrete;
to the quality of reinforcement and embedded products and their position in the slab;
by grade of reinforcing steel;
by steel grade for embedded products and mounting loops;
by deviation of the thickness of the protective layer of concrete to the reinforcement.

Road slabs 1P30-18-30 for covering city roads should not have sagging on the surface exceeding 10-15 mm, either in depth or in diameter. The absence of cracks or their parameters are strictly controlled, in cases where a small number of them is allowed. Only minor deviations in the linear dimensions of products are allowed.

Special conditions are also imposed when storing and transporting road slabs. The slabs must be stored and transported in working position. Road slabs 1P30-18-30 for covering city roads should be stored in stacks, sorted into batches. The height of the stack should be no more than 2.0 m. The bottom row of slabs in the stack should be laid on a dense, carefully leveled base on pads located at the places where the slabs are lifted. The thickness of the pads should be at least 100 mm for a soil base, and at least 50 mm for a rigid base.

* the current price may differ from that indicated on the website, for clarification, download our price list.

This is a reinforced concrete product intended for the construction of coverings highways, as well as sites for various purposes. Most often used on permanent roads.

Product Description

Road slab 1P 30-18-30 has a flat rectangular shape with four grooves on the sides. The top surface of the slab is corrugated to improve adhesion to vehicle tires or to bind to the asphalt layer placed on top.

The ability to withstand heavy loads (up to 30 tons) allows you to build really high-quality road surfaces from these slabs. Therefore, even though the price for Road Plate 1P 30.18-30 is not small, it more than pays off due to huge savings on subsequent repairs and maintenance.

The big advantage of using this product is that the construction time is much shorter than when laying traditional asphalt pavement. This is due to the ease of installation and the fact that the slab covering can be used immediately after installation. Therefore, this technology is very popular in road construction.

Dimensions, volume, weight of slab 1P 30.18-30

As for the dimensions, the road slab 1P 30.18-30 has the following dimensions:

Length: 300 cm
Width: 175 cm
Height: 17 cm

The weight of one slab is 2200 kg, so special equipment is used for transportation. The mounting loops are located in the side recesses so that after installation they do not protrude onto the surface. It is also possible to produce slabs without hinges with gripping grooves.

Installation

Road slabs 1P 30.18-30 and lifting equipment can be delivered to the installation site along an already laid road. Before laying the slabs, the soil is compacted and a sand cushion, also compacted, is organized. If sand preparation is not done, the service life of the slabs is significantly reduced. After laying, adjacent slabs are connected to each other by welding mounting loops, and the seams are sealed with mortar.

To increase the service life of the coating, as well as to even out the seams, a layer of asphalt can be laid on top of the slabs. If necessary, a drainage system is organized using trays L-1, L-2 or others.

Production

The production of reinforced concrete products is a serious and responsible matter, because the reliability of the structure under construction depends on the quality of building materials. Therefore it must be carried out in accordance with regulatory documents. The 1P 30.18-30 plate is manufactured according to the standards set out in GOST 21924.2-84.

Materials

For the production of slabs, concrete of a class not lower than B30 and unstressed reinforcement of classes A1, A3 are used. The reinforcement frame consists of two welded meshes located at the lower and upper surfaces of the slab. Depending on the climatic conditions the necessary indicators of frost resistance and water resistance are set. For the climate of most regions of Russia, F200 and W4 are considered sufficient.

In addition to cold and moisture, road slab 1P 30.18-30 can be exposed to aggressive chemical substances. For example, when treating the coating with chloride salts and other anti-icing reagents. Therefore, during production, the slabs undergo anti-corrosion treatment.

Marking

After the product passes the control of the quality control department, markings are applied to its surface, which contain basic information about the slab. In this case it is deciphered as follows:

1P - type of product and feature of its purpose - slab for permanent roads.
30 - slab length (3000 mm). Dimensions are expressed in decimeters with rounding.
18 - slab width (1750 mm).

Storage and transportation

Road slabs 1P 30-18-30 for storage are stacked in a horizontal position with wooden boards or beams laid between the rows. It is not recommended to store them in more than ten rows. During transportation and loading/unloading, do not allow strong blows and product falls. Lifting work is carried out using equipment equipped with a manipulator.

Where to buy slabs 1P 30.18-30

When looking for a building materials supplier for your project, you should consider several factors and choose best option. Has the meaning geographical position production, the possibility and conditions of delivery, the reputation and, in fact, the capabilities of the supplier, and, of course, prices. The ideal option would be to go to direct manufacturer Precast concrete products with the possibility of delivering products to your region. At the same time, it is often more profitable to purchase building materials in another area.

The LLC "" company is a direct manufacturer of reinforced concrete products. Our Tula plant has been operating since 2009, and during this time we have earned a reputation as a reliable supplier of quality products. We have long reached the interregional level and carry out orders for the Moscow, Yaroslavl, Tambov, Oryol and other regions.

As for the cost, in our price list for the position Road slab 1p 30.18-30 the price is always kept at 20-30% lower than the Russian average.

All our customers are satisfied with the prices, quality and conditions of the work. We will be glad to see you among them!