废旧轮胎橡胶灰分改性沥青的性能研究

发布时间：2018-06-27 01:47

本文选题：废旧轮胎橡胶粉灰分 + 改性沥青　；参考：《硅酸盐通报》2017年05期

【摘要】：为了研究废旧轮胎橡胶灰分用于改性沥青的性能,通过高温热分解方法制备橡胶灰分,并以0%~5.0%掺量对2种基质沥青进行改性。采用沥青三大指标、动态剪切流变试验、针入度指数、布氏粘度、弹性恢复、薄膜烘箱试验和离析试验,评价了橡胶灰分对沥青高、低温性能、温度敏感性、粘温性能、弹性恢复、老化性能和储存稳定性的影响。同时借助扫描电镜观察橡胶灰分的微观形貌,利用荧光显微镜分析改性沥青的均匀程度。结果表明:废旧轮胎橡胶灰分可显著提高沥青的高温性能,降低其温度敏感性,改善其粘温性能;当其掺量低于3.0%时,沥青的弹性恢复得到显著改善,而沥青的低温性能、老化性能和储存稳定性无明显影响;微观试验显示橡胶灰分为不规则的蜂窝状多孔结构,可吸附沥青并在其中均匀分布。
[Abstract]:In order to study the performance of rubber ash of waste tire used in modified asphalt, rubber ash was prepared by high temperature thermal decomposition method, and two kinds of matrix asphalt were modified with the content of 0% or 5.0%. Three indexes of asphalt, dynamic shear rheological test, penetration index, Brinell viscosity, elastic recovery, film oven test and segregation test, were used to evaluate the high and low temperature properties, temperature sensitivity and viscosity and temperature properties of rubber ash. Effects of elastic recovery, aging properties and storage stability. At the same time, the microstructure of rubber ash was observed by SEM, and the homogeneity of modified asphalt was analyzed by fluorescence microscope. The results show that the rubber ash of waste tire can significantly improve the high temperature performance, reduce the temperature sensitivity and improve the viscosity and temperature performance of asphalt, and when the content of rubber ash is lower than 3.0, the elastic recovery of asphalt is improved significantly, and the low temperature performance of asphalt is improved. The aging property and storage stability of rubber ash were not affected obviously, and the microcosmic test showed that rubber ash was divided into irregular honeycomb porous structure, which could adsorb asphalt and distribute uniformly in it.
【作者单位】：长安大学材料科学与工程学院交通铺面材料教育部工程研究中心;
【基金】：国家自然科学基金(51502021) 中国博士后科学基金(2015M570805) 青海省科技计划项目(2014-GX-A2A)
【分类号】：U414

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