摘要
已有的聚合物改性沥青离析试验,不能合理地模拟改性沥青稳定性发生改变的过程,且评价指标误差较大.基于此,研发了MLAST(modified laboratory asphalt stability test)试验仪.该试验仪可真实地模拟改性沥青的存储及运输过程.采用动力剪切流变试验方法,测定复数模量和相位角,给出评价改性沥青存储稳定性的指标———离析率的计算公式.结果表明,该指标精度高,能较好地评价改性沥青的存储稳定性.
The present test ＂Polymers Modified Asphalt Separation Test＂ can not reasonably reflect the change process of the storage stability. Therefore, a new storage stability test apparatus, Modified Laboratory Asphalt Stability Test, is developed to simulate the storage and transportation process of modified asphalt and improve the reliability of test results. With the help of Dynamic Shear Rheometer test, G^＊ and δ are determined. Then a new index Rs（ratio of separation） has been brought forward to evaluate the SBS modified asphalt storage stability. The results indicate this means can better evaluate the storage stability of modified asphalt.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第8期1035-1039,共5页
Journal of Tongji University:Natural Science
基金
西部交通建设科技项目(2001-318-000-38)
关键词
改性沥青
存储稳定性
离析率
动态剪切流变试验
modified asphalt
storage stability
ratio of separation
dynamic shear rheological test
