沥青材料感温性与其混合料高温稳定性关系研究

选用5种沥青分别进行5个温度下的针入度和动力粘度试验，用指标PI、PVN25-60、CI、PVN25-135来评价沥青材料感温性的大小。结果表明，前3种指标评价结果是相同的，后两种与前3种有微小的差别，总体趋势差别不大。在此基础上，对所选的沥青针对同一种级配AC-13做混合料车辙试验，研究沥青材料的不同感温性指标与其混合料高温稳定性之间的关系，比较分析了各感温性指标与动稳定度的相关性。结果表明，感温性指标PI和CL与动稳定度的相关性好，沥青材料的感温性越好，其混合料的高温抗车辙性能就越好。

Study of Relation between Asphalt Temperature Susceptibility and Its Mixture High Temperature Stability

Penetration and dynamic viscosity of five kinds of asphalt were tested in five temperatures.Their asphalt temperature susceptibility were appraised by use of indexes of PI,PVN25-60,CI,PVN25-135 and VTS.The results indicate that,among these temperature susceptibility indexes,the evaluation results of the indexes of PI,PVN25-60 and CI are very close,while the indexes of PVN25-135 and VTS have small differences with the other three,the overall trend is similar.Based on the results,mixture rut tests of the selected asphalts with the same AC-13 gradation were conducted to study the relevance between different asphalt temperature susceptibility index and its mixture high temperature stability and analyze which temperature susceptibility index is better relative to the dynamic stability.The results show that,the relevance between dynamic stability and temperature susceptibility index of PI and CI is very well;the better of a asphalt temperature susceptibility,the better of its mixture's performance to resist high temperature rut.