SBS改性沥青混合料高温性能多指标综合评价

Multiple-index Comprehensive Evaluation of High Temperature Performance of SBS Modified Asphalt Mixture

通过室内车辙试验以及静态蠕变、动态蠕变试验,研究了混合料在特定温度和压力等条件下的变形特性,全面考察了沥青混合料的高温性能,提出宜采用车辙动稳定度、相对变形、静态蠕变劲度和动态蠕变劲度等指标对混合料高温性能进行多指标综合评价;相关分析表明,不同厚度试件(50,70 mm)的车辙动稳定度以及相对变形均表现出较好的线性相关性,试验温度40℃的条件下的静态蠕变劲度和动态蠕变劲度之间也表现出较好的线性关系.

Based on the indoor wheel track test,static creep test as well as dynamic creep test,deformation characteristics were studied under the specific conditions of temperature,pressure and so on,and high temperature performance of bituminous mixture was comprehensively evaluated.A proposal was put forward that such indices as dynamic stability,relative deformation,static creep stiffness and dynamic creep stiffness should be used to make a multi-indices evaluation of high temperature performance.Analysis of the correlation between these indicators shows that both dynamic stability and relative deformation of samples of different thicknesses（50,70 mm） present a good linear correlation, and there is also an obvious linear relationship between static stiffness and dynamic stiffness at the temperature of 40℃.