水分在泡沫温拌沥青混合料中的迁移规律与作用机理

项目名称： 水分在泡沫温拌沥青混合料中的迁移规律与作用机理

项目编号： No.51278173

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 于新

作者单位： 河海大学

项目金额： 82万元

中文摘要： 泡沫温拌沥青技术是近年来兴起的一项"绿色"筑路技术，其实质是在不影响路面质量的前提下，通过注入水分降低施工温度，实现节能、减排的目的。但由于对关键技术-水分在泡沫温拌沥青混合料生产过程中的迁移规律及作用机理的研究不够深入，制约了该项技术的推广应用。本课题的研究旨在追踪水分在泡沫温拌沥青混合料中的迁移规律和界面行为，揭示水分在泡沫温拌沥青混合料中的微观作用机理，为泡沫温拌技术的推广提供基础的理论支撑。首先，通过微观分析技术追踪水分在温拌沥青混合料中的迁移规律和微观特征；其次，研究水分在泡沫温拌沥青混合料中的降粘机理和界面行为；最后，建立纳米级分子力学模型，对水分在泡沫温拌沥青混合料中的扩散行为和力学响应进行模拟，分析水分对泡沫温拌沥青混合料性能的影响机理。课题的研究有望解决阻碍泡沫温拌沥青混合料应用的核心技术，在实现节能减排的同时，保证混合料的长期性能，具有显著的社会效益和经济效益。

中文关键词： 泡沫温拌沥青；水分迁移；微观作用机理；界面行为；分子模拟

英文摘要： Foam warm asphalt mix is a "green" construction technology developed rapidly in recent years. The essence of foam warm asphalt mix is to reduce the construction temperature through injecting water during mixing process to lower the required temperature for mixing. As a result of temperature reduction, many benefits can be achieved, such as energy saving, emission reduction, and contructability. The premise of using warm mix is that the pavement performance will not be negatively affected . However, due to the short time of the technological development, some of the key technical issues have not been clearly understood or resolved. The issues include, but are not limited to,(1) how does the moisture in the foam warm asphalt mix during pumping in theproduction process migrate? (2) how does the residual moisture in the foam warm mix influence the foam asphalt mixture performance? These questions restrict the development and progress of the technology. This research mainly aims to resolve some of key issues such as tracing migration patterns of moisture in warm asphalt mixture, finding interface behavior between aggregate and asphalt during different construction process, and revealing the microscopic mechanism of moisture in the foam warm asphalt mixture ,thus providing a fundamental theoretical support f

英文关键词： Foamed warm-mix asphalt；Migration Pattern；Microscopic Mechanism；Interfacial Behavior；Molecular Simulation