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再生剂对旧沥青的再生行为

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Keywords: 沥青路面,再生沥青,再生剂,傅立叶红外光谱试验,组分分析,动态剪切流变试验,流变性,路用性能

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Abstract:

研究了再生剂对旧沥青的作用机理及对再生沥青性能指标的影响,通过傅立叶红外光谱试验及再生沥青的组分试验,分析了再生剂在旧沥青中所起作用,提出再生沥青组分含量随再生剂掺量的非线性关系模型。根据不同再生剂掺量的再生沥青的布氏粘度、针入度、动态剪切流变试验结果,分析再生剂对旧沥青性能的改善效应,总结了再生剂掺量与各指标间的关系。试验结果表明再生剂与旧沥青未发生化学反应,再生沥青组分含量与再生剂掺量的非线性关系模型相关系数在0.98以上;随再生剂掺量的增加,粘度敏感性降低,针入度敏感性增强;复数模量与抗车辙因子的对数值均与再生剂的掺量呈良好的直线递减关系;再生剂的掺量应结合再生沥青混合料性能试验来确定。

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