Laboratory evaluation of composed modified asphalt binder and mixture containing nano-silica/rock asphalt/SBS

被引:95
|
作者
Cai, Liangcai [1 ]
Shi, Xingang [1 ]
Xue, Jing [2 ]
机构
[1] Air Force Engn Univ, Xian, Shaanxi, Peoples R China
[2] Air Force Engn Design Res Bur, Beijing, Peoples R China
关键词
Composed modification; Nano-silica; Rock asphalt; SBS; Pavement performance; TEMPERATURE PERFORMANCE; RHEOLOGICAL PROPERTIES; SBS;
D O I
10.1016/j.conbuildmat.2018.03.187
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
As SBS modified asphalt has the disadvantages of high initial cost, difficult processing and poor storage stability, many researches have been conducted experiments on composed modified asphalt to get a more satisfactory pavement performance. This study proposed an asphalt mixture modified by nanosilica, rock asphalt and SBS. Basic performance tests of asphalt, rutting tests, low-temperature bending tests, moisture susceptibility tests, fatigue tests and durability tests of asphalt mixtures modified by SBS, rock asphalt, nano-silica/rock asphalt and nano-silica/rock asphalt/SBS were performed to evaluate their pavement performance. Comparing these tests results with the properties of unmodified asphalt mixture, nano-silica and rock asphalt cause an improvement in pavement performance. nano-silica/ rock asphalt/SBS modified asphalt mixture had higher temperature stability, low-temperature cracking resistance, moisture susceptibility and durability than 5% SBS modified asphalt except the similar fatigue life. Furthermore, economic analysis indicated that the nano-silica/rock asphalt/SBS modified asphalt mixture had higher cost effectiveness. (C) 2018 Elsevier Ltd. All rights.
引用
收藏
页码:204 / 211
页数:8
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