SBS改性沥青热储存稳定性研究  

Study on Hot Storage Stability of SBS Modified Asphalt

作　　者：孙大权[1] 吕伟民[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海200092

出　　处：《建筑材料学报》2006年第6期671-674,共4页Journal of Building Materials

基　　金：教育部高等学校博士点专项科研基金资助项目(20010247002)

摘　　要：利用荧光显微照相技术研究了SBS改性沥青热储存稳定性和相分离的微观过程,发现某些改性沥青即使能满足离析试验要求(上下部软化点差小于2.5℃),但是在热储存过程中其性能仍会下降,因此仅仅根据离析试验的上下部软化点差小于2.5℃来评价SBS改性沥青的热储存稳定性是不全面的.为此,提出宜用动力稳定性、性能稳定性和聚集稳定性三方面来全面评价SBS改性沥青的热储存稳定性,并提出了SBS改性沥青热储存稳定性的评价标准.The hot storage stability and the microcosmic process of phase separation of SBS modified asphalts were investigated by fluorescence microscopy. It＇s found the performance of some SBS modified asphalts would deteriorate during hot storage although the difference of softening point between the top and the bottom （△t） was no more than 2.5 ℃. Hence evaluating the storage stability only by the standard that △t is no more than 2.5 ℃ would be insufficient and unreasonable. The hot storage stability should be evaluated by dynamical stability, performance stability and aggregation stability and a new evaluation standard for the hot storage stability of SBS modified asphalt was put forward.

关 键 词：SBS改性沥青 熟储存稳定性 相分离 荧光显微照相 

分 类 号：U214.75[交通运输工程—道路与铁道工程]