Chemical and rheological evaluation of aging characteristics of terminal blend rubberized asphalt binder
Chemical and rheological evaluation of aging characteristics of terminal blend rubberized asphalt binder
复制标题
终端共混橡胶沥青胶料老化特性的化学和流变评价
DOI：
10.1016/j.conbuildmat.2019.02.008
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发表时间：
2019-04-30
影响因子：
7.4
通讯作者：
Yan, Chuanqi
中科院分区：
文献类型：
--
作者：
Tang, Naipeng;Lv, Quan;Yan, Chuanqi
在生产最终共混橡胶沥青结合料时，将废橡胶粉溶出到沥青基体中，同时向降解后的橡胶/沥青复合材料中加入聚合物，以满足性能等级标准。TB橡胶沥青结合料的抗老化性能目前尚不清楚。本文旨在评价TB橡胶沥青结合料和含聚合物添加剂的TB混合料的老化性能。采用傅里叶变换红外光谱（FTIR）、凝胶渗透色谱（GPC）和流变主曲线等方法研究了沥青结合料老化过程中的流变特性。结果表明，TB混合胶凝材料比聚合物改性沥青（PMA）具有更好的抗沥青氧化和聚合物降解老化性能。TB橡胶沥青中纳米SiO2组分的加入，提高了橡胶沥青的抗老化性能。由GPC测试得到的聚合物分子量保留指数与由相位角主曲线确定的相位角差是相互关联的。这两种方法在评价PMA的聚合物降解行为方面具有很好的应用前景。(C)2019爱思唯尔有限公司版权所有。
In the production of terminal blend (TB) rubberized asphalt binder, crumb rubber is digested into asphalt matrix, meanwhile polymers might be added to the degraded rubber/asphalt composite to meet the performance grade criteria. The anti-aging property of TB rubberized asphalt binder is not clear yet. The present study aims to evaluate the aging properties of TB rubberized asphalt binder and TB hybrid binder containing polymeric additive. Fourier transform infrared (FTIR) spectroscopy, Gel permeation chromatography (GPC) and rheological master curve were used to capture the evolution of asphalt binders with aging. The results indicate that TB hybrid binder offers better anti-aging properties than polymer modified asphalt (PMA) with respect to asphalt oxidation and polymer degradation. The presence of nano-silica component in TB rubberized asphalt is considered to improve the anti-aging property. The polymer molecular weight retention index retrieved from GPC test and phase angle difference determined from phase angle master curve are connected with each other. These two methods are very promising in evaluating polymer degradation behavior of PMA. (C) 2019 Elsevier Ltd. All rights reserved.