地质聚合物再生骨料透水混凝土浆体迁移规律研究
作者:
作者单位:

中国地质大学(武汉) 工程学院,湖北 武汉 430074

作者简介:

徐 方(1982—),男,湖北鄂州人,中国地质大学(武汉)副教授,硕士生导师,博士. E-mail: xufang@cug.edu.cn

通讯作者:

徐 方(1982—),男,湖北鄂州人,中国地质大学(武汉)副教授,硕士生导师,博士. E-mail: xufang@cug.edu.cn

中图分类号:

TU528

基金项目:

国家自然科学基金资助项目(51908522);湖北省交通运输厅科技项目(2020-2-1-10);山东省企业技术创新项目(202160101791);国家级大学生创新创业训练计划项目(202110491007)


Study on Slurry Migration Law of Permeable Concrete with Geopolymer Recycled Aggregate
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Affiliation:

Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

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    摘要:

    通过离散元模拟,利用正弦波模拟振动成型方式,采用分层浆体占比对地质聚合物再生骨料透水混凝土(GRAPC)的浆体内部组成结构进行有效表征,实时分析了GRAPC试件内部浆体的迁移运动规律与孔隙结构变化规律,并采用相关室内试验对模拟分析结果进行了验证,分析测试了GRAPC试件各层内部浆体占比与裹浆厚度随振动时间的变化规律.结果表明:振动波初始加载后,GRAPC试件浆体开始向下迁移,并且在振动时间为0.4 s时,试件各层浆体分布最为均匀;相比附加用水组,骨料强化组各层浆体占比和孔隙率浮动范围更小,且在振动作用下其内部的各层浆体占比和孔隙结构分布更为均匀,从而有效保证GRAPC材料同时具有优异的透水性能与力学性能.

    Abstract:

    Through three-dimensional discrete element simulation and the sine wave simulation vibration molding method, the layered slurry proportion was used to effectively characterize the matrix internal composition structure of geopolymer recycled aggregate permeable concrete(GRAPC). Real-time analysis of the slurry migration movement and pore structure change law were studied. The simulation results were verified by laboratory tests, and the variation of slurry proportion and slurry thickness in GRAPC specimen with vibration time was analyzed and tested. The results show that the slurry of GRAPC specimens migrates downward after the initial vibration wave loading, and the slurry distribution is the most uniform when the vibration time is 0.4 s. Compared with additional water group, the floating range of the slurry proportion and porosity of each layer in the aggregate reinforcement group is smaller, and the distribution of the slurry proportion and pore structure of each layer in the GRAPC specimen is more uniform under vibration, to ensure the reinforcement GRAPC material has excellent waterproof performance and mechanical performance at the same time.

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引用本文

徐方,熊秋阳,孔繁盛,李云凡,林俊涛.地质聚合物再生骨料透水混凝土浆体迁移规律研究[J].建筑材料学报,2023,26(3):236-243

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  • 收稿日期:2022-03-08
  • 最后修改日期:2022-06-17
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  • 在线发布日期: 2023-04-03
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