Grout injection type waterproof high-viscoelasticity modified asphalt pavement mixture and preparation method thereof

Abstract

The invention discloses a grout injection type waterproof high-viscoelasticity modified asphalt pavement mixture and a preparation method thereof. The grout injection type waterproof high-viscoelasticity modified asphalt pavement mixture comprises a matrix asphalt mixture and a grouting material, wherein the matrix asphalt mixture is filled with the grouting material. The matrix asphalt mixture is a skeleton-gap type high-viscoelasticity modified asphalt mixture which is compacted to have the gap rate of 18%-22%, and the skeleton-gap type high-viscoelasticity modified asphalt mixture is prepared from, by weight, 100 parts of aggregate, 4.2-5.2 parts of high-viscoelasticity modified asphalt and 3.7-4.7 parts of filler; the grouting material is prepared from, by weight, 100 parts of grout injection material and 34-36 parts of water, and the grout injection material is a high-elasticity-modulus nanometer grouting material.

Description

technical field [0001] The invention belongs to the field of pavement layer mixture and its design method in pavement engineering, and particularly relates to a modified asphalt pavement layer mixture and its application in pavement engineering pavement performance requirements are significantly higher than ordinary road sections and special areas The design method, that is, the grouting type impermeable high viscoelastic modified asphalt pavement mixture and its preparation method. Background technique [0002] In recent years, with the deepening of the research on asphalt mixture, the application of asphalt mixture as the pavement layer of pavement engineering has become more and more extensive. However, due to the viscoelasticity of asphalt materials, in the case of high temperature in summer, the decrease of the viscosity of asphalt materials leads to the weakening of the cohesion between the aggregate particles, and the vertical and horizontal load channels such as star...

AI Technical Summary

Problems solved by technology

However, the cement concrete pavement has disadvantages such as high rigidity, poor driving comfort, high noise, and difficult maintenance of damage, while the semi-flexible pavement can be grouted with large-gap open-graded asphalt mixture by using cement mortar or cement mortar, which improves the performance of the pavement. The strength, rutting resistance, shear resistance, water damage resistance and other properties of asphalt mixture, but due to the large voids of the parent asphalt mixture before grouting, its own performance is poor, and the overall pavement performance of the semi-flexible mixture formed after grouting has a great impact on grouting materials and The amount of grouting is highly dependent, so the semi-flexible pavement greatly changes the characteristics of the original asphalt pavement, and once the grouted solid body is damaged, the road performance of the entire mixture will drop sharply or even lose its ability to use

According to the current use of semi-flexible pavement, there are problems such as easy cracking, easy honeycombing, and difficult maintenance of semi-flexible pavement, which significantly affects the normal use of pavement engineering

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