A kind of high modulus asphalt mixture for middle surface layer of asphalt pavement

Abstract

The invention discloses a high-modulus asphalt mixture for the surface layer of asphalt pavement. High modulus asphalt mixture includes the following components: heavy traffic asphalt, polymer modifier, aggregate and filler, wherein heavy traffic asphalt accounts for 4.0-5.5% of the weight of high modulus asphalt mixture, polymer modifier It accounts for 0.3-1.0% of the weight of the high modulus asphalt mixture, and the balance is the mixture of aggregate and filler. High modulus asphalt mixture has the following advantages: (1) high stiffness modulus; (2) strong deformation resistance; (3) high rutting dynamic stability, which can significantly improve the high temperature performance of asphalt mixture and solve the problem of asphalt pavement. Rutting problems.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a high-modulus asphalt mixture used for surface layer paving of asphalt pavement. Background technique [0002] The early damage of highway asphalt pavement has become a prominent contradiction affecting the healthy development of my country's highways. In the early damage of asphalt pavement, the damage of high temperature ruts is the most prominent, not only in the south, but also in the north there are serious high temperature ruts. In order to solve the above problems, my country generally adopts the method of modified asphalt to solve the problem, and focuses on the upper layer of asphalt pavement, but it still cannot solve the problem well. The research results of NCAT in the United States show that the rutting damage of asphalt mixture with higher modulus can be reduced by 66% than that of asphalt mixture with low modulus; the research of Road Research Institute of South...

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Problems solved by technology

In order to solve the above problems, my country generally uses modified asphalt to solve the problem, and focuses on the upper layer of asphalt pavement, but it still cannot solve the problem well.