Preparation process to affect stability in waste polyethylene-modified bitumen

详细信息    查看全文

• 作者：Changqing Fang ; ^{fcqxaut@163.com" class="auth_mail} ; Pei Liu ; Ruien Yu ; Xiaolong Liu
• 关键词：Modified bitumen ; Processes parameters ; Storage stability ; Thermal stability
• 刊名：Construction and Building Materials
• 出版年：15 March, 2014
• 年：2014
• 卷：54
• 期：Complete
• 页码：320-325
• 全文大小：2286 K

文摘

An analysis of waste polyethylene (WPE) modified bitumens prepared using a variety of approaches is described in this study. The WPE was obtained from commercially-available packaging bags. It has recently been shown that addition of WPE to bitumen enhances the high temperature stability of the modified bitumen. In this paper, WPE-modified bitumens were prepared using a high-speed shear mixer employing different processing parameters. High temperature storage stability tests and morphological analysis showed that a shear rate of 3750 rpm, at 150 掳C and shear time of 1.5 h to be the optimal processing parameters of storage stability. In addition, differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) were used to analyze the thermal stability of the WPE-modified bitumen. We found that the thermal stability of the modified bitumen surpassed that of the base bitumen, but was generally independent of the preparation parameters.