CN212025810U

CN212025810U - Cold regeneration road surface structure of foam asphalt

Info

Publication number: CN212025810U
Application number: CN202020361750.2U
Authority: CN
Inventors: 邓曙光
Original assignee: Chongqing Luda Engineering Survey And Design Consulting Co ltd
Current assignee: Chongqing Luda Engineering Survey And Design Consulting Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-11-27
Anticipated expiration: 2030-03-20

Abstract

The utility model discloses a cold regeneration road surface structure of foam asphalt, this structure are laminated composite structure, composite structure is from supreme soil base course, bed course, subbase, basic unit, emulsified asphalt layer and the cold regeneration mixture layer of foam asphalt of being in proper order down, the drainage asphalt surface course has been laid to the cold regeneration mixture layer top of foam asphalt, laid waterproof modified asphalt layer between drainage asphalt surface course and the cold regeneration mixture layer of foam asphalt. The utility model has the advantages of bearing capacity is strong, maintenance time is long, waterproof performance and durability are strong and the road surface is difficult for appearing the disease.

Description

Cold regeneration road surface structure of foam asphalt

Technical Field

The utility model relates to a road technical field, concretely relates to cold regeneration road surface structure of foam pitch.

Background

With the recent high-speed development of economy in China, the infrastructure construction strength is gradually increased, and roads at all levels are also greatly developed as key contents of infrastructure construction. In order to prolong the service life of the highway and improve the road performance, the pavement of the highway needs to be subjected to preventive maintenance after being used for 3-5 years, and needs to be subjected to treatment such as medium maintenance cover or major maintenance after about 10 years. At present, the improvement of road performance is still mainly realized by adopting a traditional method of 'rifling and belly breaking' excavation recovery, which not only causes large and uneven quality difference of the original road surface, but also wastes a large amount of resources. At present, expressways built in early China enter a maintenance period successively after years of operation, and a large amount of waste asphalt mixtures are removed. The cement concrete pavement has larger excavation amount of waste materials. According to investigation, at present, most of milling materials are abandoned, abandoned old pavements are piled up like mountains, a large amount of resources are wasted, large-area farmlands are occupied, the environment is polluted, roads are necessary to be found for the abandoned materials, and the roads are required to be maintained by resource-saving and environment-friendly roads, so that the sustainable traffic development is realized.

The existing structural pavement has poor bearing capacity, long maintenance time, insufficient waterproof performance and durability, and is easy to cause diseases on the pavement.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a cold regeneration road surface structure of foam pitch to the bearing capacity who solves current structure road surface is poor, maintenance time is long, waterproof performance and durability are not enough, and the technical problem of disease appears in the road surface easily.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

the utility model provides a cold regeneration road surface structure of foam asphalt, this structure is stratiform composite construction, composite construction is from supreme soil base course, bed course, subbase, basic unit, emulsified asphalt layer and the cold regeneration mixture layer of foam asphalt in proper order down.

Preferably, a drainage asphalt surface layer is laid above the foamed asphalt cold regeneration mixed material layer.

Preferably, a waterproof modified asphalt layer is laid between the drainage asphalt surface layer and the foamed asphalt cold regeneration mixed material layer.

Preferably, an upper sealing layer is laid above the foamed asphalt cold regeneration mixed material layer.

Preferably, the upper seal layer is a slurry seal layer or a gravel seal layer or a micro-surfacing.

Preferably, the waterproof modified asphalt layer is a single-side drainage structure with one high side and one low side or a double-side drainage structure with the middle high and two low sides.

Preferably, the waterproof modified asphalt layer is of a delta-shaped structure.

Preferably, the thickness of the foamed asphalt cold-recycling mixed material layer is 10-15 cm.

Preferably, the foamed asphalt cold-recycling mixed material layer contains mineral powder or broken stone

The beneficial effects of the utility model are embodied in:

1. the foamed asphalt cold-recycling mixed material layer is used as a lower asphalt surface layer and a base layer of a first-grade highway and a second-grade highway, can also be used as an upper surface layer of a third-grade highway and a fourth-grade highway, and can carry out full-thickness recycling on the asphalt layer; the bearing capacity of the whole pavement is guaranteed by matching the foamed asphalt cold-recycling mixed material layer with the base layer, the cushion layer and the like.

2. The middle of the waterproof modified asphalt layer is provided with a waterproof modified asphalt layer, so that water permeating from the upper-layer drainage asphalt can be drained out of the pavement in time, the waterproof performance of the pavement is improved, pavement diseases are reduced, and the service life of the pavement is never prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram provided in embodiment 1 of the present invention

In the drawings, a soil base layer 1; a cushion layer 2; an underlayer 3; a base layer 4; an emulsified asphalt layer 5; a foamed asphalt cold-recycling mixed material layer 6; a drainage asphalt surface layer 7; a waterproof modified asphalt layer 8; and an upper sealing layer 9.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Embodiment 1, refer to fig. 1, the utility model discloses a cold regeneration road surface structure of foam pitch for first, second grade highway, this structure are laminated composite structure, composite structure is from supreme soil matrix layer 1, bed course 2, subbase 3, basic unit 4, emulsified asphalt layer 5 and the cold regeneration admixture layer 6 of foam pitch down in proper order, and emulsified asphalt layer is used for improving the adhesive capacity of the cold regeneration admixture layer of foam pitch and basic unit. A drainage asphalt surface layer 7 is laid above the foam asphalt cold-recycling mixed material layer 6, and a waterproof modified asphalt layer 8 is laid between the drainage asphalt surface layer 7 and the foam asphalt cold-recycling mixed material layer 6.

The maximum particle size of the gravel made of natural gravel materials adopted by the cushion layer 2 is not more than 53cm, the compaction thickness of each layer is 10cm, and the effects of water resistance, freeze prevention, pollution prevention and the like are achieved; the subbase layer 3 and the base layer 4 are paved by adopting crushed stones, the crushing value of the base layer crushed stones is larger than or equal to 26%, the crushing value of the subbase layer is not larger than 30%, the subbase layer crushing value is used for increasing the bearing capacity of the pavement, and the main bearing effect is achieved.

The waterproof modified asphalt layer 8 is a one-side drainage structure with one side higher than the other side or a two-side drainage structure with the middle higher than the other sides, specifically, the waterproof modified asphalt layer is a triangle-shaped structure, and it should be noted that the structure can also be other structures such as an arc structure, and water permeating from the drainage asphalt surface layer 7 is discharged through the waterproof modified asphalt layer 8, so that the waterproof and drainage performance of the road surface is improved. The thickness of the foamed asphalt cold-recycling mixed material layer 6 is 10-15cm, and the thickness is 12cm in the embodiment, and the foamed asphalt cold-recycling mixed material layer can be adjusted according to the pavement condition. Preferably, when the blending of the foamed asphalt cold recycling mixture can not meet the requirement of the engineering design grading range, the coarse aggregate such as the crushed stone can be properly added. When the blending passing rate of the foamed asphalt cold-recycling mixture is low, the mineral powder is properly added to adjust the gradation of the cold-recycling mixture.

Embodiment 2, refer to fig. 2, the utility model discloses a cold regeneration road surface structure of foam pitch for three, level four highway, this structure are laminated composite structure, composite structure is from supreme soil matrix layer 1, bed course 2, subbase 3, basic unit 4, emulsified asphalt layer 5 and the cold mixed bed of material that regenerates of foam pitch 6 of being in proper order down, and emulsified asphalt layer is used for improving the adhesive capacity of the cold mixed bed of material that regenerates of foam pitch and basic unit. An upper sealing layer 9 is laid above the foamed asphalt cold regeneration mixed material layer. Preferably, the upper sealing layer is a slurry sealing layer or a gravel sealing layer or a micro-surfacing layer, and is selected according to the actual road surface condition.

The thickness of the foamed asphalt cold-recycling mixed material layer 6 is 10-15cm, and the thickness is 12cm in the embodiment, and the foamed asphalt cold-recycling mixed material layer can be adjusted according to the pavement condition. Preferably, when the blending of the foamed asphalt cold recycling mixture can not meet the requirement of the engineering design grading range, the coarse aggregate such as the crushed stone can be properly added. When the blending passing rate of the foamed asphalt cold-recycling mixture is low, the mineral powder is properly added to adjust the gradation of the cold-recycling mixture.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a cold regeneration road surface structure of foam pitch which characterized in that: the structure is a layered composite structure, and the composite structure sequentially comprises a soil base layer, a cushion layer, a subbase layer, a base layer, an emulsified asphalt layer and a foamed asphalt cold-recycling mixed material layer from bottom to top.

2. The foamed asphalt cold recycled pavement structure according to claim 1, wherein: and a drainage asphalt surface layer is laid above the foamed asphalt cold regeneration mixed material layer.

3. The foamed asphalt cold recycled pavement structure according to claim 2, wherein: and a waterproof modified asphalt layer is laid between the drainage asphalt surface layer and the foamed asphalt cold-recycling mixed material layer.

4. The foamed asphalt cold recycled pavement structure according to claim 1, wherein: an upper sealing layer is laid above the foamed asphalt cold-recycling mixed material layer.

5. The foamed asphalt cold recycled pavement structure according to claim 4, wherein: the upper sealing layer is a slurry sealing layer or a gravel sealing layer or a micro-surface.

6. The foamed asphalt cold recycled pavement structure according to claim 3, wherein: the waterproof modified asphalt layer is of a single-side drainage structure with one high side and one low side or a double-side drainage structure with the middle high and two low sides.

7. The foamed asphalt cold recycled pavement structure according to claim 6, wherein: the waterproof modified asphalt layer is of a delta-shaped structure.

8. The foamed asphalt cold recycled pavement structure according to claim 1, wherein: the thickness of the foamed asphalt cold-recycling mixed material layer is 10-15 cm.