Composite asphalt pavement structural surface layer

Abstract

The utility model relates to the technical field of road engineering, in particular to a composite asphalt pavement structure surface layer, which comprises a surface layer, a drainage base layer and a waterproof sealing layer which are positioned at the top of a roadbed layer, the surface layer, the drainage base layer and the waterproof sealing layer are sequentially arranged from top to bottom, and the drainage base layer is paved at the bottom of the surface layer. Water guide structure grooves are formed in the bottoms, close to the two sides of the road, of the drainage base layer and are of a U-shaped structure, drainage pipes are connected into the water guide structure grooves, and outlets of the drainage pipes extend to be located in drainage and diversion ditches outside the roadbed layer; according to the social situation composite asphalt pavement structural surface layer, the drainage system is optimized, the structural stability is enhanced, the anti-skid performance is improved, the construction efficiency is improved, the overall performance of a pavement is remarkably improved, the service life of the pavement is remarkably prolonged, and meanwhile the requirements of environmental protection and sustainable development are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to road engineering technical field, concretely is a composite asphalt pavement structure surface course. BACKGROUND

[0002] Asphalt is the common pavement laying material of modern highway, is widely used in the main laying material of highway, urban road, has the characteristics that driving comfort performance is good. But traditional asphalt pavement generally has the problems such as easy damage, easy cracking, poor skid resistance, which not only influences the use safety of road, also increases the difficulty and economic cost of traffic management.

[0003] Traditional asphalt pavement structure mainly relies on single asphalt material, which has insufficient strength and crack resistance, and is easily damaged by various environmental factors, leading to pavement damage and cracking. SUMMARY

[0004] The utility model discloses a composite asphalt pavement structure surface course to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A composite asphalt pavement structure surface course, including the surface course of the top of roadbed layer, drainage base layer and waterproof seal layer, the surface course, drainage base layer and waterproof seal layer are sequentially arranged from top to bottom, the drainage base layer is laid in the bottom of the surface course, the drainage base layer is close to the bottom of the both sides of road and is provided with water guide structure groove, the water guide structure groove is provided with U-shaped structure, the water guide structure groove is internally connected and is provided with drainage pipe, and the outlet of the drainage pipe extends in the outer drainage ditch of the roadbed layer.

[0007] As the preferred scheme of the utility model, the surface course includes the high-strength compression-resistant material layer, the elastic material layer and the skid-resistant material layer, and the skid-resistant material layer, the elastic material layer and the high-strength compression-resistant material layer are sequentially stacked from top to bottom.

[0008] As the preferred scheme of the utility model, the high-strength compression-resistant material layer is mixed by steel fiber, glass fiber and asphalt.

[0009] As the preferred scheme of the utility model, the elastic material layer is a mixture of rubber powder, elastic plastic particles and asphalt.

[0010] As the preferred scheme of the utility model, the skid-resistant material layer is mixed by quartz sand, slag and skid-resistant silica sand and asphalt.

[0011] As the preferred scheme of the utility model, the high-strength compression-resistant material layer is internally laid with geogrid.

[0012] As the preferred scheme of the utility model, the drainage base layer is prepared by using the broken stone type super high performance concrete, the broken stone type super high performance concrete contains the broken stone particle with the particle size of 5-16 mm, and the thickness of the drainage base layer is 30-100 mm.

[0013] As the preferred scheme of the utility model, the waterproof seal layer is prepared by using the modified asphalt mixture, the modified asphalt mixture is the SBS modified asphalt mixture, the thickness of the waterproof seal layer is 20-50 mm, and the porosity of the waterproof seal layer is greater than or equal to 30%.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] In view of the problems in the background art, the application adds a composite surface layer on the traditional asphalt concrete structure, and the composite surface layer is composed of a high-strength material layer, an elastic material layer and an anti-skid material layer, so as to enhance the compression resistance, crack resistance and skid resistance of the road surface.

[0016] The steel fiber and the glass fiber can effectively improve the crack resistance and the strength of the road surface; the rubber powder and the plastic particles can effectively absorb the stress of the road surface and improve the elastic performance of the road surface; the quartz sand, the slag and the silica sand are combined with the asphalt, and the surface roughness and the adhesion are improved, so as to improve the skid resistance of the road surface.

[0017] The composite surface layer is composed of different materials and has the functions of improving the strength, the elasticity and the skid resistance of the road surface and improving the appearance and the use comfort of the road surface.

[0018] The embedding of the anti-skid material and the improvement of the surface roughness can effectively improve the friction coefficient of the road surface under the conditions of rain and snow and improve the safety of the road surface.

[0019] The utility model will be explained and described in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the overall side view of the utility model;

[0021] Fig. 2 It is the surface layer structure schematic view of the utility model;

[0022] Fig. 3 It is the surface layer side schematic view of the utility model.

[0023] In the drawing: 1, surface layer; 11, compression resistance high-strength material layer; 12, elastic material layer; 13, anti-skid material layer; 2, drainage base layer; 21, water guide structure groove; 211, drainage pipe; 3, waterproof seal layer. DETAILED DESCRIPTION

[0024] For the convenience of understanding the utility model, the utility model will be described more comprehensively below with reference to relevant drawings, and several embodiments of the utility model are given in the drawings, but the utility model can be realized through different forms and is not limited to the embodiments described in the text, on the contrary, these embodiments are provided to make the disclosed content of the utility model more thorough and comprehensive. Embodiments

[0025] Please refer to Figs. 1-3 The utility model provides a technical scheme: a composite asphalt pavement structure surface layer, including the surface layer 1 of the top of roadbed layer, drainage base layer 2 and waterproof seal layer 3, surface layer 1, drainage base layer 2 and waterproof seal layer 3 are sequentially arranged from top to bottom, drainage base layer 2 is laid at the bottom of surface layer 1, and drainage base layer 2 is provided with water guide structure groove 21 close to the bottom of both sides of road, water guide structure groove 21 is provided in U-shaped structure, and drainage pipe 211 is connected in the inside of water guide structure groove 21, and the outlet of drainage pipe 211 extends in the external drainage ditch of roadbed layer; drainage base layer 2 is prepared by using crushed stone type super high performance concrete, the particle size of the crushed stone particle contained in the crushed stone type super high performance concrete is 5 ~ 16 mm, and the thickness of drainage base layer 2 is 30 ~ 100 mm; waterproof seal layer 3 is prepared by using modified asphalt mixture, the modified asphalt mixture is SBS modified asphalt mixture, the thickness of waterproof seal layer 3 is 20 ~ 50 mm, and the porosity of waterproof seal layer 3 is ≥ 30%.

[0026] It should be noted that, in the embodiment, by setting U-shaped water guide structure groove 21 close to the bottom of both sides of road of drainage base layer 2 and connecting drainage pipe 211, road surface water can be quickly guided to the external drainage ditch of roadbed layer, the road surface water is effectively reduced, and the water damage resistance of road surface is improved;

[0027] Further, the erosion of accumulated water to the road surface is reduced, the efficient drainage system can significantly reduce the erosion of rainwater to the road surface structure, and the service life of the road surface is prolonged;

[0028] Modified asphalt or adhesive is used to connect between surface layer 1 and drainage base layer 2 to enhance the bonding strength between the two, and the bonding interface bending strength between drainage base layer 2 and surface layer 1 is ≥ 10MPa; the thermal expansion coefficient is ≤ 1.3 × 10⁻ 5 / °C; the shear strength is ≥ 3MPa; and the tensile strength is ≥ 0.6MPa;

[0029] The waterproof sealing layer 3 is made of modified asphalt mixture (SBS modified asphalt). The modified asphalt is in a high-temperature state during pouring and has adhesive properties, thereby achieving tight bonding between the two layers. The waterproof sealing layer 3 is laid on the lower surface of the drainage base layer 2 and plays a role in waterproofing and anti-seepage. The waterproof sealing layer 3 is tightly combined with the drainage base layer 2 to form a whole, preventing water from penetrating into the roadbed layer and enhancing the bonding force between the layers.

[0030] The drainage base layer 2 serves as an intermediate layer and connects the surface layer 1 and the waterproof sealing layer 3 through the internal water guide structure groove 21 and the drainage pipe 211, forming a whole drainage and waterproof system. The drainage base layer 2 has a compressive strength ≥ 120 MPa, a bending strength ≥ 13 MPa, a shrinkage value ≤ 400 ppm, and a thermal expansion coefficient ≤ 1.1 × 10⁻ 5 / °C.

[0031] The drainage base layer 2 is made of crushed stone type ultra-high performance concrete, with crushed stone particle sizes of 5-16 mm and a thickness of 30-100 mm. This design can quickly drain water, reduce road surface water, and reduce the risk of water damage.

[0032] The drainage base layer 2 is provided with a U-shaped water guide structure groove 21 near the bottom of the road on both sides, which is connected with the internal drainage pipe 211 to quickly guide the accumulated water to the external drainage ditch of the roadbed layer, further improving the drainage efficiency.

[0033] The waterproof sealing layer 3 is made of SBS modified asphalt mixture with a thickness of 20-50 mm and a porosity ≥ 30%. This material has good waterproof performance and can effectively prevent water from penetrating into the roadbed layer, prolonging the service life of the road surface.

[0034] Please refer to Fig. 2 and 3 The surface layer 1 includes a high-strength compression-resistant material layer 11, an elastic material layer 12, and a skid-resistant material layer 13. The skid-resistant material layer 13, the elastic material layer 12, and the high-strength compression-resistant material layer 11 are stacked from top to bottom. The high-strength compression-resistant material layer 11 is made of a mixture of steel fibers, glass fibers, and asphalt. The elastic material layer 12 is a mixture of rubber powder, elastic plastic particles, and asphalt. The skid-resistant material layer 13 is a mixture of quartz sand, slag, and skid-resistant silica sand and asphalt. The high-strength compression-resistant material layer 11 is internally laid with geogrid 111.

[0035] It should be noted that in this embodiment, the surface layer 1 is composed of a high-strength compression-resistant material layer 11, an elastic material layer 12, and a skid-resistant material layer 13. This multi-layer structure can effectively disperse and absorb driving loads, improving the overall load-bearing capacity and fatigue resistance of the road surface.

[0036] The compression-resistant high-strength material layer 11 made of steel fibers and glass fibers mixed with asphalt significantly improves the compression resistance and crack resistance of the road surface.

[0037] The geogrid 111 laid inside the compression-resistant high-strength material layer 11 further enhances the stability of the structure and effectively prevents the expansion of cracks.

[0038] Through reasonable structural design and material selection, the complex process during construction is reduced, and the construction efficiency is improved.

[0039] The efficient drainage system and multi-layer composite structure can significantly reduce the maintenance cost of the road surface and reduce the frequency of maintenance due to accumulated water and cracks.

[0040] The use of rubber powder and elastic plastic particles can effectively absorb the impact force generated by driving load, reduce the bumping feeling during vehicle driving, improve driving comfort, not only improve the road surface performance, but also realize the recycling of waste, conforming to the environmental protection concept,

[0041] Through optimization of material and structure design, unnecessary material use is reduced, and resource waste is reduced.

[0042] The high anti-skid performance of the anti-skid material layer 13 can significantly improve the driving safety, especially in rainy and slippery conditions, reducing the risk of vehicle skidding; the composite asphalt pavement structure surface layer improves the overall performance and service life of the road surface by optimizing the drainage system, enhancing the structural stability, improving the anti-skid performance and construction efficiency, and meets the requirements of environmental protection and sustainable development.

[0043] The working process of the utility model is as follows:

[0044] In use, waterproof seal layer construction, drainage base layer construction, surface layer construction, interlayer connection treatment and construction acceptance, through the U-shaped water guide structure groove 21 and the drainage pipe 211, the accumulated water on the road is quickly guided to the drainage ditch outside the road base layer, reducing the accumulated water on the road and improving the water damage resistance of the road surface. The multi-layer composite structure (compression-resistant high-strength material layer, elastic material layer, anti-skid material layer) can effectively disperse and absorb driving load, improve the overall bearing capacity and fatigue resistance of the road surface, the anti-skid material layer 13 is composed of quartz sand, slag and anti-skid silica sand mixed with asphalt, which significantly improves the driving safety, especially in rainy and slippery conditions, through reasonable structural design and material selection, the complex process during construction is reduced, and the construction efficiency is improved.

[0045] The utility model has carried out the exemplary description to the utility model in the above-mentioned combination drawing, obviously the utility model concrete realization is not limited by above-mentioned mode, only if the method conception and technical scheme of the utility model have been used to carry out this kind of non-essential improvement, or the conception and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A composite asphalt pavement structure surface layer, comprising a surface layer (1) located on top of a base course, a drainage base course (2), and a waterproof seal layer (3), characterized in that: The surface layer (1), drainage base layer (2) and waterproof seal layer (3) are arranged sequentially from top to bottom. The drainage base layer (2) is laid at the bottom of the surface layer (1). The drainage base layer (2) is provided with a water guiding structure groove (21) near the bottom of both sides of the road. The water guiding structure groove (21) is arranged in a U-shape. A drainage pipe (211) is connected inside the water guiding structure groove (21). The outlet of the drainage pipe (211) extends into the drainage ditch outside the road base layer.

2. The composite asphalt pavement structure surface layer according to claim 1, characterized in that: The surface layer (1) includes a high-strength compressive material layer (11), an elastic material layer (12), and an anti-slip material layer (13), which are stacked sequentially from top to bottom.

3. The composite asphalt pavement structure surface layer according to claim 2, characterized in that: The high-strength compressive material layer (11) is made of steel fiber and glass fiber mixed with asphalt.

4. The composite asphalt pavement structure surface layer according to claim 2, characterized in that: The elastic material layer (12) is a mixture of rubber powder and elastic plastic particles with asphalt.

5. A composite asphalt pavement structure surface layer according to claim 2, characterized in that: The anti-skid material layer (13) is a mixture of quartz sand, slag and anti-skid silica sand with asphalt.

6. The composite asphalt pavement structure surface layer according to claim 2, characterized in that: The compressive strength material layer (11) is internally covered with a geogrid (111).

7. The composite asphalt pavement structure surface layer according to claim 1, characterized in that: The drainage base layer (2) is made of crushed stone ultra-high performance concrete, the crushed stone ultra-high performance concrete contains crushed stone particles with a particle size of 5 to 16 mm, and the drainage base layer (2) has a thickness of 30 to 100 mm.

8. The composite asphalt pavement structure surface layer according to claim 1, characterized in that: The waterproof seal layer (3) is prepared using a modified bitumen mixture, which is an SBS modified bitumen mixture. The thickness of the waterproof seal layer (3) is 20-50 mm, and the porosity of the waterproof seal layer (3) is ≥30%.

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