硅酸盐学报2017，Vol.45Issue(9)：1360-1366,7.DOI:10.14062/j.issn.0454-5648.2017.09.20
骨料裹浆厚度对混凝土流变性能的影响
Effects of Paste Thickness on Coated Aggregates on Rheological Properties of Concrete
摘要
Abstract
The effect of paste thickness on coated aggregates on the rheological properties of fresh concrete was investigated based on Bingham model. The results show that the paste thickness on coated aggregates can have a significant effect on the rheological properties of concrete. The yield stress, plastic viscosity and static yield stress of concrete gradually decrease with the increase of paste thickness on coated aggregates under the fixed parameters of aggregates. The slump gradually increases, thus improving the flowability. At a specific water-to-cement ratio and a relatively high paste thickness on coated aggregates, the mixture shows a higher slump and the slight segregation appears. The optimum amount of cementitious materials can be determined by a relationship between rheological parameters and paste thickness on coated aggregates. It could be effective to guide the concrete mixture design by controlling the rheological properties of fresh concrete.关键词
Bingham模型/骨料裹浆厚度/流变性能/组成设计/混凝土Key words
Bingham model/paste thickness on coated aggregates/rheological properties/mixture design/concrete分类
化学工程引用本文复制引用
焦登武,安晓鹏,史才军,刘豫,李晃,何富强..骨料裹浆厚度对混凝土流变性能的影响[J].硅酸盐学报,2017,45(9):1360-1366,7.基金项目
国家国际科技合作专项(2015DFA50880) （2015DFA50880）
国家自然科学基金(U1305243,51502279). （U1305243,51502279）
