胶粉改性沥青的储存稳定性研究  

Study on Storage Stability of Crumb Rubber Modified Asphalt

作　　者：邓成[1,2] 洪锦祥[1,2] 黄冲[1,2] 刘至飞[1,2] 

机构地区：[1]高性能土木工程材料国家重点实验室(江苏省建筑科学研究院有限公司),南京210008 [2]江苏博特新材料有限公司,南京210008

出　　处：《石油沥青》2013年第3期5-10,共6页Petroleum Asphalt

基　　金：江苏省建设厅科学计划项目(JS2011JH26)

摘　　要：储存稳定性问题是制约胶粉改性沥青大规模推广应用的主要原因。制备了不同胶粉掺量、不同搅拌反应时间、不同软化剂掺量以及不同稳定剂掺量的胶粉改性沥青,通过离析试验研究了其常温储存稳定性和高温储存稳定性,并尝试使用离析试验软化点差结合储存前后软化点变化等指标用于评价胶粉改性沥青储存稳定性。研究结果表明,适当胶粉掺量、较长搅拌反应时间、掺加适量软化剂和适量稳定剂均有利于改善胶粉改性沥青的存储稳定性;采用离析试验软化点差结合热储存前后变化值可以比较全面地表征胶粉改性沥青储存稳定性。The storage stability problem is the main reason of restricting the large - scale application of the crumb rubber modified asphalt. The crumb rubber modified asphalt with different crumb rubber dosage, different stirring reaction time, different softeners dosage and different stabilizers dosage was prepared age stabilities at room temperature and high temperature were inves point difference in segregation test and the change of softening point ation indexes for storage stability of crumb rubber modified asphalt. tigated by segregation test. The , its stor- softening before and after the storage were as evalu- The research results showed that the ap- propriate dosage of crumb rubber, longer stirring reaction time, the right amount of softener and the right amount of stabilizers were conducive to improving the storage stability of the crumb rubber modified asphalt; the softening point difference in segregation test combined with the change of softening point before and after the storage could be compared to fully characterize the storage stability of crumb rubber modified asphalt.

关 键 词：胶粉改性沥青 高温储存稳定性 常温储存稳定性 离析试验软化点差 储存前后软化点变化 

分 类 号：U414[交通运输工程—道路与铁道工程]