土木与环境工程学报（中英文）2024，Vol.46Issue(6)：148-155,8.DOI:10.11835/j.issn.2096-6717.2022.113
等扩展度条件下骨料包裹砂浆层的影响因素
Influencing factors of aggregate mortar coating under the condition of equal slump-flow
摘要
Abstract
Cement(sand)slurry in the concrete plays a dual role of gelation and lubrication,its dosage with concrete increase with the increase of fluidity requirements,the existing research shows that slurry can lead to volume stability of concrete problems and low degree of green environmental protection,but the aggregate gradation on the effect of reasonable dosage of slurry in the concrete research is still rare.The influence of coarse aggregate grading and mortar rheological features on the mortar coating thickness and mortar coating content of coarse aggregate is studied by adjusting the mortar content under the condition of equal slump-flow of concrete,which coarse aggregate has a fixed amount and relative less bulk voids.The mortar coating thickness increases monotonically with the increase of the geometric average particle size of coarse aggregate,mortar coating content shows a trend of first decreasing and then increasing,while a minimum mortar coating content occurs around the optimal geometric average particle size.It has also been proved that larger mortar coating thickness and mortar coating content are required with higher fluidity,but the smaller the optimal geometric mean particle size.The mortar coating thickness and mortar coating content increase with the increase of mortar yield stress and plastic viscosity under fixed particle size grading of coarse aggregate.关键词
大流态混凝土/包裹砂浆层厚度/包裹砂浆用量/粗骨料级配/扩展度Key words
flow concrete/mortar coating thickness/mortar coating content/coarse aggregate grading/slump-flow分类
建筑与水利引用本文复制引用
李飞,巩璇,刘晨辉,冯宝锐,卢亚..等扩展度条件下骨料包裹砂浆层的影响因素[J].土木与环境工程学报（中英文）,2024,46(6):148-155,8.基金项目
十三五国家重点研发计划(2017YFC0703300) （2017YFC0703300）
国家自然科学基金(51608028)National Key Research and Development Plan During the 13th Five-Year Plan Period(No.2017YFC0703300) （51608028）
National Natural Science Foundation of China(No.51608028) （No.51608028）
