Test on Low-temperature Performance for High-temperature Pyrolytic Rubber Modified Asphalt

被引：0

作者：

Dong, Rui-Kun ^{[1
,2
]}

Qi, Chang-Peng ^{[1
,2
]}

Zheng, Kai-Jun ^{[1
,2
]}

Zhao, Meng-Zhen ^{[1
,2
]}

机构：

[1] School of Civil Engineering, Chongqing University, Chongqing,400045, China

[2] Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education, Chongqing University, Chongqing,400045, China

来源：

Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2017年 / 30卷 / 10期

关键词：

High temperature engineering - Rubber - Temperature - Asphalt - Pyrolysis - Glass transition - Bending (forming) - Differential scanning calorimetry - Powders - Thermal Engineering;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In order to investigate the effect of the pyrolysis on the low-temperature performance of modified asphalt, 9 groups of high-temperature pyrolytic rubber modified asphalt were prepared under different processing temperature and processing time respectively, whilst the degree of rubber powder cracking was represented by the solubility of different modified asphalt samples in toluene. The influence rules of processing temperature and processing time on low-temperature performances of modified asphalt were evaluated by 5℃ ductility, glass transition temperature Tg obtained by differential scanning calorimetry (DSC) test and S value obtained by bending beam rheometer (BBR) test at-24℃. The results show that, when the content of rubber powder reaches 30%, the solubility of the samples processed at 230℃ and 250℃ tends to gradually increase with the extension of the processing time. When samples are processed at 270℃, the solubility of samples increases at first and then decreases with the extension of time, caused by the violent thermal volatilization of light component. With the extension of the processing time, the low-temperature performance of high-temperature pyrolytic rubber modified asphalt prepared at 230℃ firstly increases and then decreases. The low-temperature performance of samples prepared at 250℃ and 270℃ gradually decreases. Compared with processing technologies of traditional rubber powder modified asphalt, the desulfurization and pyrolysis of rubber powder are beneficial to further improve the low-temperature performance of rubber modified asphalt within the definite scope of processing time. Among the 9 groups of high-temperature pyrolytic rubber modified asphalt, the sample prepared at 250℃ with stirring for 1h has the best low-temperature performance, followed by the sample prepared under 230℃ with stirring for 2 h. © 2017, Editorial Department of China Journal of Highway and Transport. All right reserved.

引用

页码：32 / 38