硅酸盐通报2024，Vol.43Issue(7)：2441-2450,10.
含粗骨料超高性能混凝土静态稳定性研究
Static Stability of Ultra-High Performance Concrete Containing Coarse Aggregate
摘要
Abstract
In order to improve the overall static stability of ultra-high performance concrete containing coarse aggregate(CA-UHPC),the image analysis was employed to investigate the effects of rheological parameters of the mixture(before adding fiber),coarse aggregate content and coarse aggregate gradation on the static stability of CA-UHPC without fiber and with fiber.The results show that the overall uniformity of coarse aggregate increases with the decrease of the average initial clear distance of coarse aggregate.When the yield stress and plastic viscosity of the mixture are small,the uniformity of fiber distribution decreases due to fiber settlement.The addition of fiber reduces the overall uniformity of coarse aggregate,and the coarse aggregate also affects the uniform distribution of fiber.For the CA-UHPC system,the reduction of the average initial clear distance of coarse aggregate particles increases the distribution stability of coarse aggregate,but too low average initial clear distance between coarse aggregate particles affects the distribution of fiber.Therefore,when the content of coarse aggregate is constant,the fiber distribution coefficient can increase without affecting the stability of coarse aggregate by adjusting the coarse aggregate gradation or sand ratio.关键词
超高性能混凝土/静态稳定性/平均初始净距/流变参数/粗骨料/纤维分布Key words
ultra-high performance concrete/static stability/average initial clear distance/rheological parameter/coarse aggregate/fiber distribution分类
建筑与水利引用本文复制引用
蒋健,李传习,邓帅,司睹英胡,杨赛..含粗骨料超高性能混凝土静态稳定性研究[J].硅酸盐通报,2024,43(7):2441-2450,10.基金项目
国家自然科学基金(52078059) （52078059）
长沙理工大学研究生"实践创新与创业能力提升计划"项目(CLSJCX22053) （CLSJCX22053）
