Special-purpose waterproof bonding layer for drainage asphalt pavement and design method thereof

Abstract

The invention provides a waterproof and cohesive layer exclusive for porous asphalt pavement, which comprises a structure as: a porous asphalt concrete surface layer (1), an emulsification asphalt cohesive layer (2) and a dense grad asphalt concrete surface layer (3) are orderly arranged from the upper side to the lower side, also a silicon rubber waterproof agent filtration layer (4) is arranged on or infiltrated the dense grad asphalt concrete surface layer (3). The invention can improve the waterproof property of the dense grad asphalt concrete surface layer under the porous asphalt concrete road surface, strengthens the cohesive property between the dense grad asphalt concrete surface layer and the porous asphalt concrete surface layer, prevents any moving between the porous asphalt surface layer and the dense grad asphalt concrete surface layer, effectively avoids water damages on the asphalt mixture which is resulted by rain infiltrating through the dense grad asphalt concrete surface layer, improves the waterproof property of the dense grad asphalt concrete, and improves the endurance of the dense grad asphalt surface layer of high-speed road and lengthens whole road surface service life.

Description

technical field [0001] The invention relates to a waterproof bonding layer, in particular to a special waterproof bonding layer for drainage asphalt pavement and a design method thereof. Background technique [0002] With the rapid development of highway mileage in our country, drainage asphalt pavement is more and more widely used in my country as a drainage functional pavement structure. Drainage asphalt pavement can not only effectively reduce the water mist and glare caused by surface water, but also It provides sufficient surface roughness and can reduce driving noise. In this pavement structure, it is required to set a structural layer under the drainage asphalt surface layer that takes into account waterproof and bonding functions. Generally speaking, after the construction of densely graded asphalt concrete as the substructure of drainage asphalt concrete, most of them require a maximum theoretical density of 92%, that is, the porosity of the on-site asphalt pavement ...

AI Technical Summary

Problems solved by technology

Generally speaking, after the construction of the densely graded asphalt concrete as the substructure of drainage asphalt concrete, most of them are required to reach a maximum theoretical density of 92%, that is, the porosity of the on-site asphalt pavement is 8%. , the asphalt pavement is further compacted to reach the design porosity; however, when the compaction of the asphalt pavement is poorly controlled, the on-site porosity is higher than 8%, and water seepage is easy, resulting in a large actual porosity in some areas and poor construction quality control At best, it will also cause water damage to local road sections. As long as water invades and stays in the gaps of asphalt concrete, under the action of a large number of traffic, it will cause asphalt spalling and water damage.

At present, many projects directly use the emulsified asphalt sticky layer oil spraying method to treat the waterproof adhesive layer of the drainage asphalt pavement, and the emulsified asphalt is a non-permeable waterproofing agent, and this treatment method cannot fundamentally solve the problem of waterproofing.

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