摘要
为提高基质沥青的路用性能,采用纳米Ⅰ作为改性剂,并选用A,B和C作为分散剂,制备了纳米改性沥青并进行路用性能评价;同时将纳米Ⅰ与SBS复合进行沥青改性,以考察纳米Ⅰ对聚合物改性沥青性能的影响。对其中的优选改性方案,进行DSR和BBR试验,进一步评价其路用性能。结果表明:纳米Ⅰ可以明显改善沥青的性能,使沥青的高温性能得以显著提高;纳米粒子的表面改性对沥青的性能有显著影响,有必要开发适用于沥青的纳米粒子表面改性方案,以充分发挥粒子的纳米效应;纳米Ⅰ对SBS改性沥青的影响表现为高、低温路用性能的全面提高。
In order to improve the road performance of base asphalt, nano-I was used as amodifier, and A, B and C were separately used as dispersants to prepare nano-modified asphalt and the road performance of those asphalts was evaluated. In addition, nano-I and SBScompound modified asphalt was also prepared to study the effect of nano-I on the polymer modified asphalt. Among all types of nano-I modified asphalt, the cases with outstandingperformance were selected to conduct DSR and BBR tests to further evaluate their road performance. The results show that nano-I can significantly improve the high temperatureperformance of asphalt; surface modification of nano-I particles has a significant effect on asphalt performance, so it is necessary to develop a surface modification technology suitable forasphalt modification to realize the nano-effect completely; nano-I can further improve both the high temperature and low temperature performance of SBS modified asphalt.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2013年第1期15-22,共8页
China Journal of Highway and Transport
基金
美国国家科学基金项目(CMMI-0644552
CMMI-0408390)
交通运输部西部交通建设科技项目(2011 318 223 1360)
高速铁路基础研究联合基金重点项目(U1134206)
江苏省自然科学基金创新学者攀登计划项目(SBK200910046)
国家自然科学基金外国青年学者研究基金项目(51050110143
51250110075)
关键词
道路工程
纳米改性沥青
表面改性
路用性能
PG分级
零剪切粘度
road engineering
nano-modified asphalt
surface modification
road performance
superpave performance grade
zero shear viscosity
