Comprehensive analysis of high temperature performance of SBS-modified asphalt mixture

Abstract

Evaluation of high temperature performance of SBS-modified asphalt mixture was presented. Both wheel loaded method and creep method were adopted for two different mixtures and two kinds of specimens with different height, and corresponding indicators were measured. Meanwhile, the correlation between these indicators was thoroughly analyzed and two kinds of mixtures were compared. The experimental results show that there is a good linear relationship between LWT indicators and CT indicators for M-13, while a relatively poor relationship for M-25, especially that between dynamic stiffness and static stiffness and that between dynamic stability and static creep stiffness. Besides, logarithmic relationship between DS and RD has a higher determination coefficient than that for linear relationship. Thus, multi-index evaluation should be taken for synthetically assessing high temperature performance of asphalt mixture.

Keywords

road engineering / high temperature performance / loaded wheel test (LWT) / creep test (CT) / correlation analysis / comprehensive evaluation

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