集料特性对集料-改性乳化沥青胶浆黏度的影响

发布时间：2018-04-11 10:43

本文选题：道路工程 + 集料　；参考：《东南大学学报(自然科学版)》2015年03期

【摘要】：采用不同粒径的石灰岩、玄武岩及花岗岩细集料制备了集料-改性乳化沥青胶浆,测试了集料的化学成分、比表面积和表面电荷特性以及胶浆的黏度,分析了集料特性对胶浆黏度的影响规律.结果表明:随着改性乳化沥青的破乳,沥青胶浆的黏度逐渐增大,并趋于稳定;酸性集料胶浆的黏度达到稳定状态所需的时间最短;同种岩性的集料比表面积越大,集料胶浆的初始黏度越大,而胶浆黏度达到稳定所需的时间越短;同等粒径下,集料表面ζ电位值越高,胶浆初始黏度越小,而胶浆黏度达到稳定所需的时间越长;胶浆黏度稳定所需的时间越短,表明乳化沥青破乳越快,即可供施工的时间越短.
[Abstract]:Aggregate-modified emulsified asphalt mortar was prepared from limestone, basalt and granite fine aggregates with different particle sizes. The chemical composition, specific surface area, surface charge characteristics and viscosity of aggregate were tested.The influence of aggregate properties on the viscosity of mortar was analyzed.The results show that with the demulsification of modified emulsified asphalt, the viscosity of asphalt mortar increases gradually and tends to be stable, the viscosity of acid aggregate slurry needs the shortest time to reach the stable state, and the specific surface area of the same lithologic aggregate increases.The higher the initial viscosity of aggregate slurry, the shorter the time required for the stability of slurry viscosity, the higher the Zeta potential value of aggregate surface, the smaller the initial viscosity and the longer the time required for the stability of slurry viscosity under the same particle size.The shorter the time required for the stability of slurry viscosity, the faster the demulsification of emulsified asphalt is, the shorter the construction time can be.
【作者单位】：长安大学特殊地区公路工程教育部重点实验室;同济大学建筑设计研究院(集团)有限公司;北京交科公路勘察设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51378073,51408043,51408047) 陕西省自然科学基础研究计划资助项目(2014JQ7278)
【分类号】：U414

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