甘肃省沥青路面长期老化后沥青微观分析研究

发布时间：2018-07-10 13:11

本文选题：道路石油沥青 + 老化　；参考：《硅酸盐通报》2017年09期

【摘要】：选择了道路石油沥青、实验室Pressure Vessel Aging(PAV)老化及沥青路面长期老化沥青作为研究对象,分析可知与基质沥青及实验室老化沥青相比,SK90#沥青在经过路面长期老化后,沥青的力学性能发生了明显的变化,表现为针入度与延度下降,软化点与粘度升高。通过傅里叶红外变换光谱和凝胶渗透色谱分析可知,沥青在老化过程中发生氧化发应,生成羰基和亚砜基官能团,且小分子链减少,大分子链增加;运用热重分析仪测定了沥青老化前后的热稳定性,发现老化前后沥青的热稳定性能基本保持不变。
[Abstract]:It was found that the mechanical properties of the asphalt were obviously changed after long - term aging of asphalt . The results showed that the oxidation of the asphalt during the aging process should be reduced , the molecular chain increased , and the thermal stability of the asphalt before and after aging was determined by means of FTIR and gel permeation chromatography . It was found that the thermal stability of the asphalt before and after aging can be basically unchanged .
【作者单位】：西北民族大学化工学院;甘肃省交通规划勘察设计院股份有限公司;
【分类号】：U414

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