Embedded ultra-thin wearing layer for road upper layer and its construction method

An embedded, wear-layer technology, applied in the direction of roads, roads, and on-site coagulation pavements, can solve the problems of reflection cracks, weak bonding between layers, insufficient surface slip resistance, etc., and achieves deep structural depth. , The effect of reducing water mist and good anti-skid performance

Active Publication Date: 2019-06-14
NANJING FORESTRY UNIV
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Problems solved by technology

In order to reduce construction costs, some scholars have also conducted research on thin-layer asphalt concrete. The thickness of this thin-layer asphalt concrete pavement is in the range of 2-3cm. The research shows that thin-layer asphalt concrete has obvious economic benefits compared with 4cm asphalt concrete, but It also faces the problem of insufficient anti-slip surface and weak bonding between layers, which cannot solve the problem of reflective cracks

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  • Embedded ultra-thin wearing layer for road upper layer and its construction method
  • Embedded ultra-thin wearing layer for road upper layer and its construction method
  • Embedded ultra-thin wearing layer for road upper layer and its construction method

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Embodiment Construction

[0021] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0022] In order to solve the shortcomings of the existing thin-layer asphalt concrete as the upper layer of the road, the present invention proposes an embedded ultra-thin wear layer structure for the first time, which is a gravel seal layer using high-viscosity asphalt in the lower layer and large-void asphalt concrete in the upper layer. The high-viscosity asphalt in the crushed stone seal is partially embedded in the voids of the large-void asphalt concrete, thereby forming a related structure in which the crushed stone seal and the large-void asphalt concrete are embedded and interwoven.

[0023] The upper structure adopts large-void asphalt concrete with a porosity of 15% to 30%, and the high-viscosity asphalt in the gravel seal can be filled in the voids in high-temperature seasons to prevent oil flooding of the structure in high-temperature season...

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Abstract

The invention discloses an embedded ultrathin friction course (EUFC) for an upper layer of a pavement. The EUFC is a combined structure consisting of a lower crushed stone sealing layer and upper porous asphalt concrete, and high-viscosity asphalt portions of the crushed stone sealing layer are embedded in holes of the porous asphalt concrete. The porosity of the porous asphalt concrete is 15% to 30%, and the thickness of the porous asphalt concrete is no greater than 3 cm. The invention also discloses a construction method of the EUFC. The crushed stone sealing layer is firstly spread on the pavement, and then the porous asphalt concrete is paved on the crushed stone sealing layer. Compared with the prior art, the EUFC for the upper layer of the pavement has the advantages of good drainage performance, crack resistance, anti-slip performance and noise reduction performance and low cost.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to an embedded ultra-thin wear layer for the upper layer of the road and a construction method thereof. Background technique [0002] The upper layer of the existing asphalt pavement basically uses asphalt concrete with a nominal maximum particle size of 4cm and a maximum particle size of 13.2mm, which is relatively expensive. In order to reduce construction costs, some scholars have also conducted research on thin-layer asphalt concrete. The thickness of this thin-layer asphalt concrete pavement is in the range of 2-3cm. The research shows that thin-layer asphalt concrete has obvious economic benefits compared with 4cm asphalt concrete, but It also faces the problem of insufficient surface anti-slip and weak bonding between layers, which cannot solve the problem of reflective cracks. Contents of the invention [0003] The technical problem to be solved by the present i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/35
CPCE01C7/353
Inventor 马翔
Owner NANJING FORESTRY UNIV
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