Effects of fibers on the dynamic properties of asphalt mixtures
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- 作者：Shaopeng Wu (1) wusp@whut.edu.cn
Qunshan Ye (1)
Ning Li (1)
Hongbo Yue (1) - 关键词：Key words fiber ; asphalt mixture ; dynamic modulus ; phase angle ; master curve
- 刊名：Journal of Wuhan University of Technology--Materials Science Edition
- 出版时间：December 2007
- 出版年：2007
- 期刊代码：pc358_1000-2413
- 类别：ch
- 卷：22
- 期：4
- 页码：733-736
- 数据来源：sp
摘要
The dynamic characteristics of fiber-modified asphalt mixture were investigated. Cellulose fiber, polyester fiber and mineral fiber were used as additives for asphalt mixture, and the dosage was 0.3%, 0.3%, 0.4%, respectively. Dynamic modulus test using SuperPave simple performance tester (SPT) was conducted to study the dynamic modulus (E*) and phase angle (δ) for the control asphalt mixture and fiber-modified ones at various temperatures and frequencies. Experimental results show that all fiber-modified asphalt mixtures have higher dynamic modulus compared with control mixture. The dynamic modulus master curves of each type of asphalt mixtures are determined based on nonlinear least square regression in accordance with the timetemperature superposition theory at a control temperature (21.1掳C). The fatigue parameter E*脳sinδ and rutting parameter E*/sinδ of asphalt mixture are adopted to study the fatigue and rutting-resistance properties, and experimental results indicate that such properties can be improved by fiber additives.