广东水利水电Issue(11)：95-102,8.
外掺粗骨料对预混料超高性能混凝土力学性能的影响
Effect of Coarse Aggregate on Mechanical Properties of Premix Ultra-high Performance Concrete
摘要
Abstract
To investigate the influence of coarse aggregate on the mechanical properties of ultra-high performance concrete(UHPC),the effects of coarse aggregate dosage(10%～30%)and particle size(5～10 mm,10～20 mm,5～20 mm)on the working properties,compressive strength,flexural strength and split tensile properties of UHPC were studied.The results show that,with the increase of coarse aggregate dosing,the working performance of UHPC gradually decreases,the compressive strength and splitting tensile strength show a trend of increasing and then decreasing,and the strength reached the peak when the dosage of coarse aggregate was 20%;The dosing of coarse aggregate has a significant adverse effect on the flexural strength of UHPC which led to a gradual decrease in the folding compression ratio.The tensile compression ratio increases first and then decreases,and the highest tensile compression ratio is found when the coarse aggregate dosage is 20%;the comprehensive performance is optimal when the particle size of the coarse aggregate is 5～20 mm.Reasonable mixing 20%of 5～20 mm coarse aggregate can be prepared with both excellent mechanical properties and economy of UHPC with coarse aggregate.The research results can provide theoretical basis for the optimization of the design of UHPC proportion,balancing the mechanical properties and economy,which can help to promote the application of UHPC with coarse aggregate.关键词
粗骨料/UHPC/力学性能/预混料Key words
coarse aggregates/UHPC/mechanical properties/premix分类
建筑与水利引用本文复制引用
谢小辉,刘穗虎,姚楚康,钟哲..外掺粗骨料对预混料超高性能混凝土力学性能的影响[J].广东水利水电,2025,(11):95-102,8.基金项目
广东建工集团科技创新普通项目(编号:2022-08) （编号:2022-08）
广东水电二局科研立项项目(编号:ysdky2022-02). （编号:ysdky2022-02）
