基于服役温度域的彩色沥青感温性对比分析

基于沥青路面服役温度域,从高温、中温、常温、低温四个影响沥青服役性能的温度区间,对比了CA70、CA90彩色沥青和A70、A90道路石油沥青的感温性.结果表明:不同的服役温度域内,沥青的感温性不同;相比道路石油沥青,彩色沥青的低温域范围区间不同,感温性变化较大,但随着温度域向高温域变化,感温性逐渐稳定.现有的单一感温性指标不能完全代表沥青在整个服役温度域内的感温性变化,建议沥青的温度敏感性评价指标与沥青的不同服役温度域挂钩.

Comparative Analysis of the Low-Temperature Rheological Properties of Colored Asphalt Based on the Force-Ductility Experiment

Based on the service temperature range of the asphalt pavement , the asphalt temperature sensibility of color asphalt ( CA70 , CA90 ) and asphalt ( A70 , A90 ) was contrast from four different service temperature range-high temperature , medium temperature , normal temperature and low temperature .The results showed that the asphalt temperature sensibility was different in different service temperature field .Compared with road petroleum asphalt , the temperature sensibility of color asphalt had a great change . However the temperature sensibility became stable gradually with the change of temperature field form the low temperature to the high temperature .The existing single sensibility indicator could not represented the sensibility change in the whole serving temperature field .Therefore asphalt temperature sensitivity evaluation index should link to different asphalt serving temperature field .