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橡胶沥青老化机理研究

Keywords: 道路工程,橡胶沥青,四组分分析,老化机理,红外光谱分析

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Abstract:

为了探究橡胶沥青老化的内在机理,采用四组分分析试验和红外光谱,分析了两种基质沥青和两种橡胶沥青原样、RTFO后残留物和PAV后残留物的化学组分和微观结构组成的变化。试验结果表明,橡胶沥青老化后,沥青质的含量增加,胶质、芳香分和饱和分的含量减小。橡胶沥青的老化由基质沥青老化和废胶粉的老化降解两部分组成。基质沥青老化的产物有亚砜、羟酸、酮和酸酐。废胶粉老化裂解后有胺类物质产生。

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