RU21051U1 - DESIGN OF ROAD CLOTHES ON THE ORTHROTOPIC PLATE OF THE ROADWAY OF THE BRIDGE - Google Patents

Abstract

The construction of the roadway of the roadway of the bridge, including primer, rubber-bitumen, waterproofing mastic layers made on the basis of rubber-bitumen binder, asphalt concrete pavement, made of two-layer with the lower layer of compacted asphalt concrete and the upper layer of cast asphalt concrete, including primer and primer anticorrosive material, rubber-bitumen layer - bitumen and rubber, waterproofing layer - rubber-bitumen, sand and mineral powder, compacted and sphalte concrete - bitumen, crushed stone, sand and mineral powder, and cast asphalt - rubber, cube-shaped crushed stone, sand and mineral powder, characterized in that the asphalt concrete coating on the areas adjacent to the expansion joints is made of one layer containing cast asphalt concrete the width of the site is at least 1 m, and cubic granite crushed stone of a fraction of 4-20 mm with a strength of at least 1200-1400 kg / cm is selected as a stone material in pavement

Description

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DESIGN OF ROAD CLOTHES ON THE ORTHROTOPIC PLATE OF THE ROADWAY OF THE BRIDGE

The technical solution relates to the construction of road coverings and can be used mainly to create pavement on an orthotropic slab of the carriageway of bridges.

A pavement laid on a base is known, which has three layers: an adhesive layer covering the base, an elastic layer containing rubber grains connected by a binder material filling the pores between the grains, and an elastic layer of high molecular weight material impregnating the surface of the elastic layer. (See Japanese Patent No. 6080241 IPC E01C13 / 0).

A known design of the bridge road deck, which contains steel panels, the upper surface of which is covered with a layer of modified epoxy resin with distributed grains of corundum. The upper surface of the layer is coated with a modified epoxy resin with a silica sand aggregate. (See Japanese Patent No. 6092642 IPC E01C7 / 30).

The disadvantage of this design is the low service life due to the fragility, fragility and low adhesion of the entire coating and the appearance of defects during operation.

A known construction of road pavement of bridge structures, consisting of a protective-adhesive layer based on an epoxy compound with crushed stone scattered over its surface and a two-layer asphalt concrete coating. (See. Design of pavements according to SNiP 3.06.04-92)

The disadvantage of this design is the low technological quality of the coating, since when applying an epoxy compound at the construction site, consisting of individual components (epoxy resin, coal tar, cement, hardener), it is necessary to strictly maintain their dosage at each batch. This in some cases leads to errors that adversely affect the durability of the pavement structure as a whole.

From the practice of domestic bridge building, the construction of pavement using materials produced by the Swiss company Zika. It contains an anticorrosive layer of EGI material, an epoxy compound that acts as a protective-adhesive layer, of Haftmasse material with fine crushed stone scattered over its surface, a buffer bitumen layer of material

Ehsa with small black gravel scattered over its surface and a two-layer asphalt concrete pavement.

The practice of operating the construction of pavement from these materials does not yet allow to draw conclusions about the timing of defect-free operation of the coating. However, in this design of pavement, there is contact of dissimilar materials - protective-adhesive and buffer bitumen layers, which do not provide complete gluing of the layers together.

In all of the pavement constructions listed above, asphalt concrete is used, the service life of which does not exceed 5-7 years.

Known pavement sold by the German company Romex on bridges. The pavement structure contains a corrosion-resistant layer made of Rompox 8101 material, a polyurethane protective-adhesive layer made of Rompur 2605 material, a gluing layer Rampur 900 and a two-layer asphalt concrete coating with molded asphalt concrete as one of the layers.

Closest to the proposed is the construction of pavement on the bridge over the Neva River and the village. Maryino of the Leningrad Region, made according to the technology of the Finnish company Lemminkäinen. The design consists of a primer layer on the basis of a rubber-bitumen binder, a subsequent layer of a rubber-bitumen binder, a waterproofing layer of mastic based on a rubber-bitumen binder and a two-layer asphalt concrete coating, the lower layer of which is made of compacted and the upper one is made of cast asphalt.

The advantage of this design is the use of a single component of each layer, which ensures their good adhesion. However, when laying pavement, cutting of longitudinal seams up to 20 mm wide at the root of the consoles and transverse seams in supporting sections is provided in order to avoid cracks during operation. This complicates the paving technology.

The objective of this utility model is to improve the quality of bridge pavement while simplifying its laying technology by eliminating the cutting of joints by selecting appropriate materials.

The problem is solved in that the design of the pavement of the roadway of the bridge, including those made on the basis of rubber-bitumen binder: primer, rubber-bitumen, waterproofing mastic layers, asphalt concrete pavement, made two-layer with a lower layer of compacted asphalt concrete and an upper layer of cast asphalt, asphalt concrete includes: bitumen, solvent and adhesive anti-corrosion material;

rubber-bitumen layer - bitumen and rubber, waterproofing layer - rubber-bitumen, stone sowing, sand, mineral powder, compacting asphalt concrete - bitumen, crushed stone, sand and mineral powder, cast asphalt concrete - rubber-bitumen, cubical crushed stone, sand and mineral asphalt, according to the solution, according to the solution at the edges adjacent to the expansion joints, it is made of a single layer of cast asphalt concrete, while the width of the site is at least 1 meter, and cubic g is selected as a stone material in road pavement anitny fraction 4-20 mm crushed stone strength of at least 1,200-1,400 kg / cm.

The proposed solution is illustrated by drawings. In FIG. 1 is a schematic sectional view of pavement layers on an orthotropic plate; FIG. 2 is a schematic illustration of the layers of pavement in the context of pavement on the expansion joint, in Fig.Z is a top view of the expansion joint with pavement, where:

1. orthotropic plate of the carriageway;

2. primer layer;

3. rubber-bitumen layer;

4. waterproofing layer;

5. blackened crushed stone;

6. compacted asphalt concrete;

7. Cast asphalt;

8. expansion joint

9. section of the carriageway with a two-layer asphalt concrete pavement

10. section of the carriageway with a single-layer asphalt coating

For pavement applied to the orthotropic plate, special requirements are imposed in connection with exposure to vibration and heavy load.

The roadway of the bridge consists of an orthotropic plate 1, which is a corroded metal structure located on the spans of the bridge. Spans with abutments and one of the bridge supports are connected using expansion joints.

A primer layer 2 is applied to the orthorhopic plate 1 on the basis of a rubber-bituminous binder with the addition of Soolvessa solvent and an adhesive anti-corrosion material of diamine.

The rubber-bitumen layer 3 is made of bitumen and rubber and has a thickness of 2.5 to 4 mm.

The waterproofing layer 4 is a mastic of a mixture of rubber bitumen, stone sowing, mineral powder and sand, and is laid in hot form to ensure seamless waterproofing. The minimum layer of mastic waterproofing layer is 20 mm.

On the waterproofing layer 4, a sprinkling of blackened gravel 5 of a fine fraction is applied to ensure adhesion. Blackened crushed stone 5 is a crushed stone coated with a rubber-bitumen binder.

Compacted asphalt 6 is a mixture of stone material, sand, mineral powder and bitumen.

The top layer of pavement is made of cast asphalt 7, which is a mixture of stone material, sand, mineral powder and rubber bitumen. Cast asphalt is boiled and poured hot, which results in a waterproof coating.

In the places where the bridge spans are connected with the expansion joint 8 in section 9, two-layer asphalt concrete pavement is located, and in section 10, at a distance of 1 meter from the edges, the pavement has a single-layer asphalt concrete pokrygie of cast asphalt 7, which avoids the formation of cracks during operation of the bridge. The use of cast asphalt allows avoiding cutting technological longitudinal and transverse seams on the pavement after laying.

As bitumen, local bitumen of the BND 90/130 or BND 60/90 grades (GOST 22245-90) can be used, for example, bitumen from the Cracking plant in Saratov and OAO Saratov Oil Refinery.

Rubber binder KV60 and KB 100, in which styrene-butadiene rubber or thermoplastic block polymer of styrene-butadiene Calprene 416 was used, were used as a binder in pavement.

Granite crushed stone of fraction up to 4 mm with a particle size of 2.74 - crushing screenings according to GOST 8736-93 from the Goloday-Gora gabbro-diabase deposit Karelnerud OJSC and 4-16 mm granite cubic crushed stone (according to GOST 8267-93 produced by Karelnerud OJSC from the Shokshchinsky diabases deposit with a strength of 1400 and frost resistance of 200) or 5-20 mm (according to GOST 82670-93). In the construction of pavement, Volga river sand was used both local and mineral powder, produced in the Tula region and the city of Volsk, Saratov region.

Mineral for asphalt mixtures according to GOST 16557-78 from Volsk, Saratov region.

For the first time in the practice of domestic bridge building, cast asphalt concrete was used over a large area of coverage - about 460000 m using domestic materials manufactured in serial production. This design of pavement can be used in the construction of bridges in the climatic zone of central Russia with a temperature regime of + 40 ° to -40 ° C.

Claims (1)

The construction of the roadway of the roadway of the bridge, including primer, rubber-bitumen, waterproofing mastic layers made on the basis of rubber-bitumen binder, asphalt concrete pavement, made of two-layer with the lower layer of compacted asphalt concrete and the upper layer of cast asphalt concrete, including primer and primer anticorrosive material, rubber-bitumen layer - bitumen and rubber, waterproofing layer - rubber-bitumen, sand and mineral powder, compacted and sphalte concrete - bitumen, crushed stone, sand and mineral powder, and cast asphalt - rubber, cube-shaped crushed stone, sand and mineral powder, characterized in that the asphalt concrete coating on the areas adjacent to the expansion joints is made of one layer containing cast asphalt concrete the width of the site is at least 1 m, and cubic granite crushed stone of a fraction of 4-20 mm with a strength of at least 1200-1400 kg / cm ^{2 is} selected as a stone material in pavement.