市政技术2024，Vol.42Issue(1)：175-181,7.DOI:10.19922/j.1009-7767.2024.01.175
再生骨料对自密实混凝土工作性能与流变特性的影响
Effect of Recycled Aggregate on Working and Rheological Properties of SCC
摘要
Abstract
In order to study the effect of recycled aggregate on working and rheological properties of self-compacting concrete(SCC),recycled brick powder and recycled aggregates replaced cement and natural aggregate respectively for SCC.Under different replacing rates(1％,2.5％,5％)of recycled brick powder,the working and rheological prop-erties of SCC were studied;The replacing rates of recycled coarse aggregates(15％,30％,50％)and pre-wetting time(0,2,24 h)on SCC were studied;The types(recycled fine aggregates of concrete,clay brick,mixed),replacing rates(25％,50％,75％,100％)and pre-wetting time(0,2,24h)on SCC were studied.The results show that the effect sequence on working properties of SCC is recycled fine aggregates of clay brick,mixed and concrete from high to low;The working properties of SCC decreases with the increase of replacing rates of these three recycled fine aggregates.The yield stress and plastic viscosity increase namely rheological properties are enhanced;Under the same replacing rate,the longer the prewetting time,the lower the working properties of recycled fine aggregate.The optimal working properties of the recycled coarse aggregate occurs at 2 h.The study improves the application & promotion of SCC.关键词
SCC/再生骨料/工作性能/流变特性Key words
self-compacting concrete(SCC)/recycled aggregates/working performance/rheological properties分类
建筑与水利引用本文复制引用
杨立君,李烨,刘彩虹,凌一峰,高天明,葛智..再生骨料对自密实混凝土工作性能与流变特性的影响[J].市政技术,2024,42(1):175-181,7.基金项目
山东高速河南发展有限公司研究课题(fz-2022-64) （fz-2022-64）
