西北水电Issue(6)：43-48,6.DOI:10.3969/j.issn.1006-2610.2023.06.008
体积水粉比对高自密实混凝土强度影响研究
Study on the Influence of Volumetric Water-To-Powder Ratio on the Strength of High Performance Self-Compacting Concrete
摘要
Abstract
The mix strength grade design of high performance self-compacting concrete is the top priority for engineering quality.In order to study the influence of different volumetric water-to-powder ratio(W/P)on the strength of high self-compacting concrete,the im-proved full calculation method is used to design the ratio strength grade,and the working properties of freshly mixed concrete such as slump,slump expansion,V-funnel and T50 flow time are tested.The development of the compressive strength of standard cubes at differ-ent ages(3、7、28、56 and 90 days)is studied.The results show that when the volumetric water-to-powder ratio increases from 0.8 to 0.9、0.96 and 1.0,the 7-day compressive strength values decreases by 23.8%,25.4%and 29.5%,respectively.The 28-day com-pressive strength decreases by 21.9%、33.2%and 34.2%,respectively.The 90-day compressive strength values decreases by 18.3%、33.5%and 41.4%,respectively,and the gap between the compressive strength values gradually increases with the increase of age.The test results provide a basis for the promotion and application of high performance self-compacting concrete.关键词
高自密实混凝土/体积水粉比/强度等级Key words
high performance self-compacting concrete/volumetric water-to-powder ratio/intensity level分类
建筑与水利引用本文复制引用
杨俊峰,李玉洁,张天祺,罗滔,金峰..体积水粉比对高自密实混凝土强度影响研究[J].西北水电,2023,(6):43-48,6.基金项目
国家自然科学基金青年项目(51909223) （51909223）
国家自然科学基金重点项目(52039005) （52039005）
陕西省青年科技新星项目(2022KJXX-85) （2022KJXX-85）
清华大学水圈科学与水利工程全国重点实验室开放基金项目(sklhse-2023-C-04). （sklhse-2023-C-04）
