再生剂对旧沥青的再生行为  

Recycling behavior of recycling agent on aged asphalt

作　　者：周志刚[1] 杨银培[1] 张清平[1] 高及阳[1] 

机构地区：[1]长沙理工大学道路结构与材料交通行业重点实验室,湖南长沙410004

出　　处：《交通运输工程学报》2011年第6期10-16,共7页Journal of Traffic and Transportation Engineering

基　　金：国家自然科学基金项目(51178065;50778027);海南省交通运输厅科技计划项目(琼交科教[2008]295号)

摘　　要：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。The action mechanism of recycling agent on aged asphalt and the influence on the performance indicators of recycling asphalt were studied, Fourier transform infrared spectroscopy test and the component test of recycling asphalt were used to analyze the role of recycling agent on aged asphalt. The nonlinear relationship model of recycling asphalt component content and recycling agent mixing ratio was proposed. Depending on the experimental results of Brookfield viscosity, penetration and dynamic shear rheometer（DSR） for recycling asphalts with different recycling agent mixing ratios, the improvement of recycling agent on aged asphalt properties was analyzed, relationships among recycling agent mixing ratio and every index were summarized. Test result shows that there is no chemical reaction between recycling agent and aged asphalt, the interrelated coefficient of nonlinear relationship model for recycling asphalt component content and recycling agent mixing ratio is above 0.98. Viscosity sensitivity decreases, and penetration sensitivity increases with the increase of recycling agent mixing ratio. The logarithms of complex modulus and anti-rutting factor have good linear decreasing relationships with recycling agent mixing ratio, and the mixing ratio should be determined by recycling asphalt mixture performance test. 7 tabs, 5 figs, 15 refs.

关 键 词：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 

分 类 号：U414.75[交通运输工程—道路与铁道工程]