抗剥落剂对泡沫沥青冷再生混合料水稳定性能改善研究  

Improvement on water loss resistance of foamed asphalt cold recycled mixture by anti-stripping agent

作　　者：李秀君[1] 代鹏[1] 高世柱 李宇 邓轻松 LI Xiujun;DAI Peng;GAO Shizhu;LI Yu;DENG Qingsong(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《上海理工大学学报》2020年第6期566-571,共6页Journal of University of Shanghai For Science and Technology

基　　金：住房城乡建设部2018年科学技术项目计划(2018–K9–062)。

摘　　要：由于泡沫沥青冷再生路面水稳定性能较差,掺加抗剥落剂可以有效改善普通沥青路面的抗水损能力,针对此问题探究向泡沫沥青冷再生混合料中掺加抗剥落剂来提高其水稳定性能的可行性。以一种非胺类抗剥落剂为研究对象,对不同抗剥落剂掺量下的沥青进行发泡试验和3大指标试验,对泡沫沥青冷再生混合料进行相关水稳定性试验。结果表明:抗剥落剂的最佳掺量为沥青质量的0.5%,掺加抗剥落剂后,在标准试验条件下,沥青的针入度增大,延度和软化点降低,泡沫沥青冷再生混合料的水稳定性能明显提高,空隙率减小了3%,浸水残留稳定度比和5次冻融循环后的强度比均提高10%以上。Water resistance performance of the foamed asphalt cold recycled pavement is insufficient.The anti-stripping agent can effectively improve the water loss resistance of the ordinary asphalt pavement. The feasibility of adding anti-stripping agent to the foamed asphalt cold recycled mixture for the improvement of water resistance was explored. A non-amine anti-stripping agent was used as the research object. The asphalt with different anti-stripping agents was tested for foaming and three major indices. The mixture was tested for relevant water stability tests. The results show that the optimum amount of anti-stripping agent is 0.5% of asphalt on a weight basis. After the addition of the antistripping agent, under the standard test conditions, the elongation and softening point is reduced, and the penetration of the asphalt is increased. The water loss resistance of the foamed asphalt cold recycled mixture is obviously improved, and the residual stability ratio and the strength ratio after five freezethaw cycles are increased by more than 10%.

关 键 词：泡沫沥青 抗剥落剂 空隙率 浸水马歇尔试验 冻融循环试验 

分 类 号：U414[交通运输工程—道路与铁道工程]