SBS modified bitumen in the presence of hydrophilic or hydrophobic silica nanoparticles
SBS modified bitumen in the presence of hydrophilic or hydrophobic silica nanoparticles
复制标题
亲水性或疏水性二氧化硅纳米粒子存在下的 SBS 改性沥青
DOI：
10.1016/j.conbuildmat.2017.07.177
复制
发表时间：
2017-10-30
影响因子：
7.4
通讯作者：
Huang, Xu
中科院分区：
文献类型：
--
作者：
Xia, Tian;Zhou, Longmei;Huang, Xu
SiO2改性沥青/SBS的流变行为与SiO2的表面性质及其组分密切相关。由于沥青与R974之间的优先吸引作用，疏水改性沥青/SBS共混物的流变性能明显优于亲水性改性A200共混物。在R974和A200改性共混体系中，随着SiO2含量的增加，其流变性能呈现非单调变化，这与纳米颗粒的分散密切相关。在流体流变行为中起主要作用的是刚性纳米颗粒本身，而不是相分离导致的不同尺寸的不变的液滴-基质结构。(C) 2017 Elsevier Ltd.版权所有。
The rheological behavior of bitumen/SBS modified by SiO2 is found to be strongly dependent on SiO2 surface nature and its fraction. The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974. The rheological property exhibits a nonmonotonic change with SiO2 fraction either in R974 or A200 modified blends, which is closely related to the dispersion of nanoparticles. The rigid nanoparticles themselves play a main role in the rheological behavior, rather than the unchanged droplet-matrix structure with different droplet size induced by phase separation. (C) 2017 Elsevier Ltd. All rights reserved.