Preparation method of high-temperature-rutting-resistant warm mix asphalt mixture

Abstract

The invention relates to the technical field of the preparation of road engineering materials, in particular to a preparation method of a high-temperature-rutting-resistant warm mix asphalt mixture. The preparation method comprises the following steps: dispersing SBS rubber powder in the mixed asphalt to obtain the asphalt with the dispersed SBS rubber powder, adding the asphalt with the dispersedSBS rubber powder into white mineral oil, performing high-speed cutting emulsification to obtain rubber powder modified asphalt, mixing filled aggregate rubber powder modified asphalt, a warm mix agent and quick lime to obtain the high-temperature-rutting-resistant warm mix asphalt mixture. The warm mix asphalt mixture is dispersed in the white mineral oil in a small particle form, the solubilitybetween the white mineral oil molecules and the SBS molecules is improved, the low-temperature fracturing resistance of the warm mix asphalt mixture and the adhesive force between binder and aggregates at the low temperature can be improved, and the molten fiber components and little un-molten components coat the surface of stone to form a bridging effect between the stone and the asphalt and between the stone and stone, so that a large adhesive force is produced, the viscosity elasticity of the white mineral oil is improved, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of preparation of road engineering materials, in particular to a method for preparing a high-temperature rutting-resistant warm-mix asphalt mixture. Background technique [0002] The pace of highway construction in my country is accelerating, and the maintenance and repair tasks of roads are intensified accordingly. my country has gradually changed from the construction stage to the maintenance stage. Due to the characteristics of the semi-rigid base pavement structure in my country, there are many reflection cracks in the early diseases of highways. In addition, there are many heavy-duty vehicles in my country's road vehicles, and the phenomenon of heavy traffic is common. Under heavy-duty traffic, the early damage of asphalt pavement is serious. The typical type of road damage under heavy traffic is high-temperature rutting. Therefore, how to effectively improve the deformation resistance of asphalt mixtu...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is aimed at reducing the mixing temperature of the asphalt mixture for the current warm asphalt mixture, which will affect the high temperature stability and low temperature cracking resistance of the asphalt mixture.

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