盐冻循环条件下沥青高低温性能的灰关联熵分析

发布时间：2018-06-09 03:40

  本文选题：胶粉改性沥青 + 盐冻循环　； 参考：《复合材料学报》2017年05期

【摘要】：利用动态剪切流变仪(DSR)和弯曲梁流变仪(BBR)对冻融循环前后的三种沥青(沥青、苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性沥青、胶粉改性沥青)进行测试,比较分析不同冰冻温度、融雪盐浓度、冻融循环次数下三种沥青的高低温性能变化规律,并对环境因素进行灰熵分析。结果表明:在盐冻循环条件下对沥青复合模量G*影响最大的因素是融雪盐溶液浓度,其次是10℃延度;对沥青相位角δ影响最大的因素是软化点,其次是25℃针入度;对沥青蠕变劲度模量S影响最大的因素是融雪盐溶液浓度,其次是10℃延度;对沥青蠕变速率m影响最大的因素是试验温度,其次是冰冻温度。
[Abstract]:Three kinds of asphalt (asphalt, styrene butadiene-styrene block copolymer modified asphalt, rubber powder modified asphalt) before and after freeze-thaw cycle were tested by dynamic shear rheometer (DSRM) and bending beam rheometer (BBR). The changes of high and low temperature performance of three kinds of bitumen under different freezing temperature, concentration of snow salt and times of freeze-thaw cycle were analyzed, and the grey entropy analysis of environmental factors was carried out. The results show that the concentration of melted snow salt solution, the ductility at 10 鈩，

本文编号：1998714