Method for improving drainage performance of double-layer drainage asphalt pavement

Abstract

The invention relates to a method for improving the drainage performance of a double-layer drainage asphalt pavement, belongs to the technical field of drainage asphalt pavements, and solves the problems of pore blockage and drainage performance reduction caused by deposition of dust particles in pores of the double-layer drainage asphalt pavement at present. The method comprises the following steps: selecting materials such as a silane compound and nano white carbon black to prepare a super-hydrophobic solution; using a high-pressure water mist gun for uniformly spraying the super-hydrophobicwater solution to the asphalt mixtures on the upper structural layer, the lower structural layer and the periphery of the gap of the double-layer drainage asphalt pavement; controlling the spraying amount, testing the actual drainage performance and the self-cleaning effect through a contact angle and a constant head permeameter, determining the optimal spraying amount to improve the drainage performance of the double-layer drainage asphalt pavement, and removing dirt through water flow in pores to realize the self-cleaning effect, and reduce the pore blockage probability. According to the method for improving the drainage performance of the double-layer drainage asphalt pavement, the phenomenon of pore blockage can be improved, the drainage capacity is improved, and a good self-cleaningeffect is achieved.

Description

technical field [0001] The invention relates to a method for improving the drainage performance of a double-layer drainage asphalt pavement, which belongs to the technical field of drainage asphalt pavement. Background technique [0002] Double-layer drainage asphalt pavement, as the main pavement form for noise reduction, is mainly composed of a thinner layer of small-pore drainage asphalt and the next thicker layer of large-pore drainage asphalt. The drainage asphalt structure layer of the lower layer can eliminate the water film on the road surface mainly by improving the lateral drainage. Compared with the traditional drainage asphalt pavement, it can discharge the stagnant water on the road surface faster. In addition, the drainage asphalt layer with small gaps in the double-layer drainage asphalt pavement can block large particles of dust, and leave most of the particle size dust in the surface layer of the road and the pores of the surface layer, so that it does not f...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for improving the drainage performance of double-layer drainage asphalt pavement, so as to solve the problem of poor hydrophobic effect on the surface of the pore structure of the current double-layer drainage asphalt pavement, weak self-cleaning ability, and problems caused by the deposition of dust particles in the pores of the double-layer drainage asphalt pavement. Pore ​​clogging occurs, resulting in a decrease in the drainage performance of double-drainage asphalt pavements

[0010] In order to solve the problems of poor surface hydrophobic effect, weak self-cleaning ability of the pore structure of the current double-drainage asphalt pavement, and pore blockage due to the deposition of dust particles in the pores of the double-drainage asphalt pavement, resulting in a decrease in the drainage performance of the double-drainage asphalt pavement