CN212052153U

CN212052153U - Anti-stripping type exposed-stone concrete pavement

Info

Publication number: CN212052153U
Application number: CN202020366842.XU
Authority: CN
Inventors: 赵春吉; 周祥文; 赵冉; 王涛; 巩云鹏; 张玉; 刘海明; 薛涛; 许春松; 高晋魁
Original assignee: Shanxi Communications New Technology Development Co ltd; Shanxi Traffic Planning Survey Design Institute Co Ltd
Current assignee: Shanxi Communications New Technology Development Co ltd; Shanxi Traffic Planning Survey Design Institute Co Ltd
Priority date: 2020-03-22
Filing date: 2020-03-22
Publication date: 2020-12-01
Anticipated expiration: 2030-03-22

Abstract

The utility model particularly relates to an anti type dew stone concrete pavement that peels off has solved current dew stone concrete pavement in use and has had that the water-resistant decreases the problem that the performance is not enough, the surperficial building stones drops seriously to lead to the road surface performance sharply to descend. An anti-stripping type exposed-stone concrete pavement comprises a roadbed; a graded broken stone cement layer is laid on the roadbed; a reinforced concrete layer is laid on the graded broken stone cement layer; a single-stage gravel concrete layer is laid on the reinforced concrete layer; and a polymer mortar layer is laid on the single-graded broken stone concrete layer. The utility model discloses a prevent effectively that the purpose that surperficial building stones drop, the water damage resistance performance is excellent moreover, and anti-shearing performance is good, has that unconfined compressive strength is high, the basis is stable, the road bed is difficult for sinking, long service life's advantage.

Description

Anti-stripping type exposed-stone concrete pavement

Technical Field

The utility model relates to a road surface for the highway engineering specifically is an anti-stripping type dew stone concrete road surface.

Background

In highway engineering, the exposed-stone concrete pavement is widely applied, has the advantages of good noise reduction effect, good anti-skid property, high compressive strength, good weather resistance and the like, can obviously improve the driving quality, and is suitable for heavy traffic road sections.

However, practice shows that the prior art dew stone concrete pavement has the following problems in use: firstly, the water damage resistance of the exposed concrete pavement is insufficient due to the lack of a waterproof layer structure on the surface; and secondly, stone materials on the surface of the exposed concrete are mainly subjected to transverse shearing force, and the flexural strength of the cement concrete on the surface of the exposed concrete is insufficient, so that the stone materials on the surface of the exposed concrete are seriously fallen off, and the service performance of the pavement is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve present dew stone concrete road surface in use have that water-resistant decreases the performance not enough, the surperficial building stones drops seriously and leads to the problem that road surface performance sharply descends, provide an anti type dew stone concrete road surface that peels off.

The utility model discloses an adopt following technical scheme to realize:

an anti-stripping type exposed-stone concrete pavement comprises a roadbed; a graded broken stone cement layer is laid on the roadbed; a reinforced concrete layer is laid on the graded broken stone cement layer; a single-stage gravel concrete layer is laid on the reinforced concrete layer; and a polymer mortar layer is laid on the single-graded broken stone concrete layer.

During construction, firstly, cement, fly ash and graded broken stone are mixed with water, spread on a roadbed, and paved with a graded broken stone cement layer after vibrating, extracting slurry and leveling; then concrete with certain thickness is paved on the graded broken stone cement layer, reinforcing steel bars are placed on the concrete after vibration, slurry lifting and leveling, and then the rest concrete is paved on the reinforcing steel bars to form a reinforced concrete layer, so that the reflection of the roadbed stress to the surface layer of the utility model is reduced, and then transverse cutting seams with the interval of 6m are arranged on the reinforced concrete layer along the direction vertical to the road; then spreading concrete containing single-grade broken stone on the reinforced concrete layer, spraying cement retarder on the surface after vibrating, extracting slurry and leveling, and then brushing the surface with a large amount of water until the single-grade broken stone is exposed to a certain height; then arranging a transverse joint seam at the same position as the transverse joint seam of the reinforced concrete layer to finish the laying of the single-stage gravel concrete layer; at last spread the polymer mortar on the rubble concrete layer is joined in marriage to the single-stage, wash the surface with the water and expose certain height until the rubble is joined in marriage to the single-stage after that, form the polymer mortar layer that has certain flexural strength and water damage resistance ability, accomplish from this the utility model discloses a construction operation. In the using process, the reinforced concrete layer improves the integrity of the pavement, can effectively avoid the generation of cracks on the exposed stone surface layer and prevent stones on the surface from falling off; the polymer mortar layer can promote the utility model discloses an anti shear property has further avoided the problem that surperficial building stones drops. The utility model overcomes there are the water-resistant performance not enough, the surperficial building stones of current dew stone concrete road surface in use to drop and seriously lead to the problem that road surface performance sharply descends.

The paving thickness of the roadbed is 35 cm.

This road bed can provide stable basis for this dew stone concrete road surface, prevents that disease such as road bed subsides from reflecting to the road surface layer on, and then prevents to produce the crack, has avoided the problem that surperficial building stones drop.

The graded broken stones of the graded broken stone cement layer are limestone graded broken stones; the cement of the graded broken stone cement layer is 42.5R type portland cement; the paving thickness of the graded broken stone cement layer is 20 cm.

The reinforced concrete layer comprises a plurality of steel fibers distributed in the concrete, and the length of each steel fiber is 5-6cm, and the diameter of each steel fiber is 0.5-0.8 mm; the steel bars of the reinforced concrete layer are composed of a plurality of longitudinal steel bars arranged along the direction of the road and a plurality of oblique steel bars forming an included angle of 60 degrees or 120 degrees with the direction of the road, the distance between two adjacent longitudinal steel bars is 250mm, the distance between two adjacent oblique steel bars is 300 mm and 400m, and each steel bar is deformed steel bar with the diameter of 12 mm; the distance between each steel bar and the upper surface of the reinforced concrete layer is 8-9cm, and the paving thickness of the reinforced concrete layer is 26 cm.

The steel fiber can effectively prevent the micro-cracks in the concrete from expanding and the macro-cracks from forming, obviously improves the tensile, bending, impact and fatigue resistance of the reinforced concrete layer, and has better ductility.

The single-stage gravel of the single-stage gravel concrete layer is basalt stone with a polishing value of more than or equal to 65 and a grain diameter of 9.5-16mm, the paving thickness of the single-stage gravel concrete layer is 4-8cm, and the height of the part, exposed out of the single-stage gravel concrete layer, of the upper surface of the single-stage gravel concrete layer is 4-5 mm.

The polymer mortar layer is made of water-based epoxy resin modified cement mortar with the cement-aggregate ratio of 5-10%; the spreading thickness of the polymer mortar layer is 2-3 mm; the height of the single-stage gravel concrete layer of which the single-stage gravel is exposed out of the upper surface part of the polymer mortar layer is 1.5-2 mm.

The utility model has the advantages of reasonable design reliably, realized effectively preventing the purpose that surperficial building stones drop. And the water loss resistance is excellent, the anti-shearing performance is good, the integrity is good, cracks are not easy to generate, and further, the tensile, impact and fatigue resistance performance is good, the ductility is good, and the advantages of high unconfined compressive strength, stable foundation, difficult settlement of a roadbed and long service life are achieved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1-roadbed, 2-graded broken stone cement layer, 3-reinforced concrete layer, 4-single-grade broken stone concrete layer and 5-polymer mortar layer.

Detailed Description

An anti-stripping type exposed-stone concrete pavement comprises a roadbed 1; a graded broken stone cement layer 2 is paved on the roadbed 1; a reinforced concrete layer 3 is laid on the graded broken stone cement layer 2; a single-grade broken stone concrete layer 4 is laid on the reinforced concrete layer 3; and a polymer mortar layer 5 is paved on the single-graded broken stone concrete layer 4.

The paving thickness of the roadbed 1 is 35 cm.

The graded broken stones of the graded broken stone cement layer 2 are limestone graded broken stones; the cement of the graded broken stone cement layer 2 is 42.5R type portland cement; the paving thickness of the graded broken stone cement layer 2 is 20 cm.

The reinforced concrete layer 3 comprises a plurality of steel fibers distributed in the concrete, and the length of each steel fiber is 5-6cm, and the diameter of each steel fiber is 0.5-0.8 mm; the steel bars of the reinforced concrete layer 3 are composed of a plurality of longitudinal steel bars arranged along the road direction and a plurality of oblique steel bars forming an included angle of 60 degrees or 120 degrees with the road direction, the distance between two adjacent longitudinal steel bars is 200-400 m, the distance between two adjacent oblique steel bars is 300-400m, and each steel bar is deformed steel bar with the diameter of 12 mm; the distance between each steel bar and the upper surface of the reinforced concrete layer 3 is 8-9cm, and the paving thickness of the reinforced concrete layer 3 is 26 cm.

The single-grade crushed stone of the single-grade crushed stone concrete layer 4 is basalt stone with a polishing value of more than or equal to 65 and a grain diameter of 9.5-16mm, the paving thickness of the single-grade crushed stone concrete layer 4 is 4-8cm, and the height of the part, exposed out of the single-grade crushed stone concrete layer 4, of the single-grade crushed stone concrete layer 4 is 4-5 mm.

The polymer mortar layer 5 is made of water-based epoxy resin modified cement mortar with the cement-aggregate ratio of 5-10%; the spreading thickness of the polymer mortar layer 5 is 2-3 mm; the height of the single-graded broken stone concrete layer 4 exposed out of the upper surface part of the polymer mortar layer 5 is 1.5-2 mm.

In the specific implementation process, the lap joint length of the steel bars of the reinforced concrete layer 3 is more than or equal to 600mm, and the lap joint angle is less than 60 degrees; the steel fiber of the reinforced concrete layer 3 is steel wire, and the addition amount of the steel fiber is 2 percent (the volume ratio of the steel wire to the concrete is 2: 100); the roadbed 1 is a two-ash soil roadbed, is formed by paving, compacting and preserving after mixing soil, lime and fly ash, and the optimal water content is 18% -20%; leveling the roadbed 1 by using a leveling machine after leveling, compacting by using rolling vibration molding, and then moisturizing and preserving health; the roadbed 1 is formed by spreading, rolling and curing 17cm and 18cm layers.

Claims

1. An anti-stripping type exposed-stone concrete pavement comprises a roadbed (1); the method is characterized in that: a graded broken stone cement layer (2) is paved on the roadbed (1); a reinforced concrete layer (3) is laid on the graded broken stone cement layer (2); a single-grade broken stone concrete layer (4) is laid on the reinforced concrete layer (3); a polymer mortar layer (5) is laid on the single-graded broken stone concrete layer (4).

2. The spall-resistant dewstone concrete pavement of claim 1, wherein: the paving thickness of the roadbed (1) is 35 cm.

3. The spall-resistant dewstone concrete pavement of claim 1, wherein: the graded broken stones of the graded broken stone cement layer (2) are limestone graded broken stones; the cement of the graded broken stone cement layer (2) is 42.5R type portland cement; the paving thickness of the graded broken stone cement layer (2) is 20 cm.

4. The spall-resistant dewstone concrete pavement of claim 1, wherein: the reinforced concrete layer (3) comprises a plurality of steel fibers distributed in the concrete, and the length of each steel fiber is 5-6cm, and the diameter of each steel fiber is 0.5-0.8 mm; the steel bars of the reinforced concrete layer (3) are composed of a plurality of longitudinal steel bars arranged along the direction of the road and a plurality of oblique steel bars forming an included angle of 60 degrees or 120 degrees with the direction of the road, the distance between two adjacent longitudinal steel bars is 200-400 m, the distance between two adjacent oblique steel bars is 300-400m, and each steel bar is deformed steel bar with the diameter of 12 mm; the distance between each steel bar and the upper surface of the reinforced concrete layer (3) is 8-9cm, and the paving thickness of the reinforced concrete layer (3) is 26 cm.

5. The spall-resistant dewstone concrete pavement of claim 1, wherein: the single-grade crushed stone of the single-grade crushed stone concrete layer (4) is basalt stone with a polishing value of more than or equal to 65 and a grain diameter of 9.5-16mm, the paving thickness of the single-grade crushed stone concrete layer (4) is 4-8cm, and the height of the part, exposed out of the single-grade crushed stone concrete layer (4), of the single-grade crushed stone concrete layer (4) is 4-5 mm.