Pavement structure for treating net-shaped crack and cracked surface of asphalt pavement

Abstract

The utility model relates to the technical field of road engineering, and particularly discloses an asphalt pavement net-shaped crack and cracked surface treatment pavement structure, which comprises an asphalt pavement layer, a bonding layer, a reinforcing and repairing layer, a waterproof and breathable layer and a wear-resistant layer, the bonding layer is bonded with the asphalt pavement layer and uniformly coated at the upper end of the asphalt pavement layer, the reinforcing and repairing layer is bonded with the bonding layer, and the waterproof and breathable layer is coated at the lower end of the waterproof and breathable layer. The waterproof breathable layer is bonded with the bonding layer and located at the upper end of the bonding layer, the reinforcing and repairing layer fills pits of the asphalt pavement layer and the bonding layer to be flat, the waterproof breathable layer is bonded with the reinforcing and repairing layer and located at the upper end of the reinforcing and repairing layer, and the wear-resistant layer is bonded with the waterproof breathable layer and located at the upper end of the reinforcing and repairing layer. The wear resistance of the pavement can be further enhanced, the service life of the road is prolonged, the pavement strength is improved, and the strength and wear resistance of the treated pavement with net-shaped cracks and cracks are effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of road engineering, in particular to a pavement structure for treating the surface of cracks and crazing of an asphalt pavement. Background Art

[0002] At present, after a period of use, asphalt pavement will gradually develop defects such as cracks, network cracks, and loose cracks. The cracks first appear in the asphalt surface layer or the bottom of the stable base layer. The network cracks and loose cracks are mainly caused by the poor performance of the asphalt mixture, the strength of the base layer and the weak construction technology, as well as the influence of natural conditions. The more traditional crack repair methods include crack filling, surface sealing and thin layer covering.

[0003] However, the existing technology has deficiencies in terms of aging resistance, adhesion, temperature sensitivity and toughness. The cracks will sink again, and the repaired areas may crack and seep again, causing damage to the base layer and potholes, and even gradually evolving into serious structural diseases such as subsidence, which will significantly reduce the strength of the road surface and shorten the service life of the road. Utility Model Content

[0004] The utility model aims to provide a pavement structure for treating the surface of cracks and crazing of an asphalt pavement, aiming to solve the technical problems in the prior art that the cracks may sink again, the repaired areas may crack and seep again, the base layer may be damaged, the potholes may be damaged, and even the serious structural diseases such as sinking may gradually develop, so that the pavement strength is significantly reduced and the service life of the road is shortened.

[0005] To achieve the above-mentioned purpose, the utility model adopts a pavement structure for treating the surface of a cracked asphalt pavement, which includes an asphalt pavement layer, a bonding layer, a reinforcement repair layer, a waterproof and breathable layer and a wear-resistant layer. The bonding layer is bonded to the asphalt pavement layer and is evenly coated on the upper end of the asphalt pavement layer. The reinforcement repair layer is bonded to the bonding layer and is located at the upper end of the bonding layer. The reinforcement repair layer fills the pits of the asphalt pavement layer and the bonding layer until they are flat. The waterproof and breathable layer is bonded to the reinforcement repair layer and is located at the upper end of the reinforcement repair layer. The wear-resistant layer is bonded to the waterproof and breathable layer and is located at the upper end of the reinforcement repair layer.

[0006] Wherein, the bonding layer is a cationic modified emulsified asphalt, and the spraying amount of the bonding layer is 150g to 250g / m 2 .

[0007] Wherein, the reinforcement and repair layer is a slurry seal layer.

[0008] Wherein, the waterproof and breathable layer is a sand-containing fog sealing layer.

[0009] Wherein, the wear-resistant layer is composed of epoxy resin as a binder and ceramic particles as aggregates.

[0010] The beneficial effects of the pavement structure for treating the surface of a cracked asphalt pavement are as follows: the bonding layer bonds the reinforcement repair layer to the asphalt pavement layer, which can play a good maintenance role on the asphalt pavement layer and make the repair structure more stable; the reinforcement repair layer can effectively fill the gaps inside the cracks and fissures and completely cover the surface of the bonding layer, reinforce the loose parts of the road surface that are damaged and separated, form a dense and solid road surface sealing layer, and improve the performance of the pavement structure; the waterproof and breathable layer composed of the sand-containing mist sealing layer has a spreading thickness of 0.5 to 1.0 mm and is evenly spread on the reinforcement repair layer to form a waterproof and breathable thin layer, which can further prevent the occurrence of water seepage on the road surface; the wear-resistant layer is a wear-resistant paving structure with epoxy resin as a bonding material and ceramic particles as aggregates. It is paved on the waterproof and breathable layer, which can further enhance the wear resistance of the road surface and effectively enhance the strength and wear resistance of the road surface that has cracked and cracked diseases after treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The utility model is a structural schematic diagram of a pavement structure for treating a surface of a network crack or a crack on an asphalt pavement.

[0013] 1- Asphalt pavement layer, 2- Adhesive layer, 3- Reinforcement repair layer, 4- Waterproof and breathable layer, 5- Wear-resistant layer. DETAILED DESCRIPTION

[0014] See also Figure 1The utility model provides a pavement structure for treating the surface of a network crack and a crack on an asphalt pavement, comprising an asphalt pavement layer 1, a bonding layer 2, a reinforcement and repair layer 3, a waterproof and breathable layer 4 and a wear-resistant layer 5, wherein the bonding layer 2 is bonded to the asphalt pavement layer 1 and is evenly coated on the upper end of the asphalt pavement layer 1, the reinforcement and repair layer 3 is bonded to the bonding layer 2 and is located at the upper end of the bonding layer 2, and the reinforcement and repair layer 3 fills the pits of the asphalt pavement layer 1 and the bonding layer 2 until they are flat, the waterproof and breathable layer 4 is bonded to the reinforcement and repair layer 3 and is located at the upper end of the reinforcement and repair layer 3, and the wear-resistant layer 5 is bonded to the waterproof and breathable layer 4 and is located at the upper end of the reinforcement and repair layer 3.

[0015] Furthermore, the bonding layer 2 is a cationic modified emulsified asphalt, and the spraying amount of the bonding layer 2 is 150g to 250g / m 2 .

[0016] Furthermore, the reinforcement repair layer 3 is a slurry seal layer.

[0017] Furthermore, the waterproof and breathable layer 4 is a sand-containing fog sealing layer.

[0018] Furthermore, the wear-resistant layer 5 is composed of epoxy resin as a binder and ceramic particles as aggregates.

[0019] In this embodiment, the bonding layer 2 is made of cationic SBS modified emulsified asphalt, and the spraying amount is 250g / m 2 After the surface of the bonding layer 2 is dried, the reinforcement repair layer 3 can be spread on the bonding layer 2 using an emulsified asphalt slurry seal paver. The reinforcement repair layer 3 is composed of 15 to 36 parts of cement powder, 15 to 35 parts of emulsified asphalt, 5 to 10 parts of water, 5 to 15 parts of fine aggregate, 45 to 65 parts of coarse aggregate and 1 to 1.5 parts of anti-dispersant. The cement powder is phosphate cement, the emulsified asphalt is a cationic polymer modified emulsified asphalt, the fine aggregate is quartz sand of 40 to 70 mesh, the coarse aggregate is any one of basalt and limestone, the stone gradation follows any one of ES-1 and ES-2 specified in 6.5 Slurry Seal and Micro-surfacing in JTFF40-2004, and the anti-dispersant is a polyvinyl alcohol solution with a concentration of 2% to 4%;

[0020] After the reinforcement repair layer 3 is dried, the waterproof breathable layer 4 is sprayed. The waterproof breathable layer 4 adopts a sand-containing mist seal layer, wherein the ratio of the mist seal layer raw material, aggregate and water is 100:35-65:10-25, and the aggregate is any one of quartz sand or basalt sand, with a mesh size of 30-70 meshes. Finally, the wear-resistant layer 5 is constructed, and the epoxy resin material composed of components A and B is mainly epoxy resin, and the component B material is a curing agent. The aggregate is ceramic particles with a particle size of 30 to 60 meshes, and the coarse aggregate is ceramic particles with a particle size of 8 to 16 meshes. After mixing components A and B, stir them thoroughly until they are uniformly mixed into a mixing agent for standby use. Then, the fine aggregate and the mixing agent are mechanically added in a ratio of 100:40 to 100:70, preferably 100:55, and mixed and stirred evenly to form epoxy mortar and spread on the waterproof and breathable layer 4 with a spreading thickness of 2 to 6 mm, and the coarse aggregate is immediately spread at a spreading rate of 4 to 8 kg / m 2 , after drying and solidification, the road repair is completed.

[0021] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A pavement structure for treating cracks and fissures on an asphalt pavement surface, characterized in that: It includes an asphalt pavement layer, a bonding layer, a reinforcement and repair layer, a waterproof and breathable layer and a wear-resistant layer. The bonding layer is bonded to the asphalt pavement layer and is evenly coated on the upper end of the asphalt pavement layer. The reinforcement and repair layer is bonded to the bonding layer and is located at the upper end of the bonding layer. The reinforcement and repair layer fills the pits of the asphalt pavement layer and the bonding layer until they are flat. The waterproof and breathable layer is bonded to the reinforcement and repair layer and is located at the upper end of the reinforcement and repair layer. The wear-resistant layer is bonded to the waterproof and breathable layer and is located at the upper end of the reinforcement and repair layer.

2. The asphalt pavement surface treatment structure for cracks and fissures as claimed in claim 1, characterized in that: The bonding layer is a cationic modified emulsified asphalt, and the spraying amount of the bonding layer is 150g to 250g / m 2 .

3. The asphalt pavement surface treatment structure for cracks and fissures as claimed in claim 1, characterized in that: The reinforcement repair layer is a slurry seal layer.

4. The asphalt pavement surface treatment structure for cracks and fissures as claimed in claim 1, characterized in that: The waterproof and breathable layer is a sand-containing fog sealing layer.

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