摘要
用直接剪切的方法制备了SBS、废旧橡胶粉以及纳米SiO2三元复合改性沥青,研究了拌合时间、拌合温度及改性剂掺量对沥青形貌以及沥青软化点、针入度、延度的影响规律.研究结果表明,在拌和温度为180℃、拌和时间为6h,SBS掺量为5%、橡胶粉掺量为25%、SiO2掺量为0.05%的条件下,能够获得改性沥青最优性能,与基质沥青相比,改性沥青的软化点提高了63%,5℃延度提高了600%.
Waste rubber powder,SBS and nano-SiO2 complex-modified asphalt were prepared by direct shear.The effects of shearing time,temperature and amount of modifying agent on the morphology,softening temperature,penetration degree and ductility of modified asphalt were discussed.Their common technical performance were tested.The results show that the modified asphalt containing 25% of waste rubber powder,5% SBS and 0.05% nano-SiO2 achieve optimal performance when the mixing temperature is at 180 ℃,the mixing time is 6 h.The softening point increased 63%,ductility at 5 ℃ increased by 600% in comparison with original asphalt.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2012年第1期77-83,共7页
Natural Science Journal of Xiangtan University
基金
国家科技部资助项目(C9C26214301994)
湖南省水利厅科技计划资助项目([2010]124-02)
湖南省交通厅资助项目(200814)
长沙市科技局科技计划项目(K1005176-11)
关键词
沥青
废旧橡胶粉
SBS
复合改性
性能
asphalt
waste rubber powder
SBS
complex-modified
performance
