摘要
Abstract
The mix design and performance analysis of self-compacting concrete were carried out for the Jiangxia Reservoir project in Jiangxi.The influence of factors such as concrete flowability,water cement ratio,slurry to bone ratio,and sand ratio on concrete performance were obtained.The experimental results showed that when the dosage of cementitious material was 640kg/m³,the flowability of concrete was significantly improved by adjusting the water cement ratio,and there was no segregation or bleeding phenomenon.The ratio of slurry to bone had a significant impact on the early compressive strength of concrete,and with the increase of age,the compressive strength reached its optimum at a ratio of slurry to bone of 36:64.The optimization of sand ratio was crucial for the fluidity and workability of concrete,and under the experimental conditions,the optimal sand ratio was 40%.Based on the above research results,the recommended mix proportion for C20W6F50 high self-compacting performance concrete was proposed,and the trial mixing verified that it met the design index requirements,had high compressive strength,impermeability,and frost resistance.It provides theoretical support and practical guidance for the construction of self-compacting concrete in Jiangxia Reservoir,Jiangxi.关键词
自密实混凝土/配合比/砂率/浆骨比/水胶比Key words
self-compacting concrete/mix ratio/sand rate/ratio of serum to bone/water-binder ratio分类
建筑与水利
