期刊论文

Performance and modification mechanism of SBS composite modified asphalt by rubber powder/high viscosity agent

中文

长沙理工大学学报(自然科学版)

1672-9331

2020

17

2

1-9

10.3969/j.issn.1672-9331.2020.02.002

国家自然科学基金资助项目（51878079）； 湖南省交通科技计划项目（201807）；

本校为第一机构

通过添加胶粉和高黏剂对SBS改性沥青进行复合改性。采用基本物理指标研究高黏改性沥青的制备工艺;采用软化点差值法评价高黏改性沥青的热储存稳定性;采用动态剪切流变试验（DSR）研究高黏改性沥青的高温流变性能和中温抗疲劳性能;借助傅里叶红外光谱（FTIR）和差示扫描量热法（DSC）对高黏改性沥青的改性机理进行分析。基本物理试验结果表明:胶粉有助于提高改性沥青的高温性能,但对其低温性能有不利影响,高黏剂能够大幅度提高改性沥青的黏度,最佳的胶粉掺量和三种高黏剂的掺量分别为:10%、8%、7%、8%。离析试验结果表明:三种高黏改性沥青的热储存稳定性满足规范要求。DSR试验结果表明:胶粉和高黏...

The SBS modified asphalt was modified by both rubber powder and high viscosity agent.The preparation process of high viscosity modified asphalt was studied by basic physical indexes.The thermal storage stability of high viscosity modified asphalt was studied by the softening point difference method.High temperature rheological properties and medium temperature anti-fatigue of high viscosity modified asphalt were studied by Dynamic Shear Rheological(DSR)test.The modification mechanism of high viscosity modified asphalt was analyzed by Fourier Transform Infra-Red(FTIR)and Differential Scanning C...