铁道科学与工程学报2018，Vol.15Issue(5)：1147-1154,8.
−3℃养护下引气混凝土孔结构与抗渗性研究
Research of air-entraining concrete for pore structure characteristics and permeability under ?3 ℃ curing condition
摘要
Abstract
This experiment mainly adopts AutoPoreIV 9500 automatic mercury injection apparatus and intelligent multi-function concrete durability tester to respectively study pore structure characteristics of air-entraining concrete net pulp and concrete dentsu growth with the age under the ?3 ℃ and standard curing condition. The results show that total intrusion volume, average pore diameter, the critical aperture, most probable aperture, porosity and electric flux decreases with the growth of age. But the skeleton density increases. Adding 0.01% air-entraining agent can make the concrete average pore diameter, the critical aperture, most probable aperture, skeleton density and electric flux decreases. At the same time, total intrusion volume and porosity increased. When the permeability with air content of concrete with 4.1% under ?3 ℃ curing condition compares with the standard curing condition within the 28, 56, 84, 112 and 140 d age, the permeability rate fluctuates between 70.77%~114.35%. This article has great practical value and reference significance through studying of air-entraining concrete for pore structure characteristics and permeability under ?3 ℃ curing condition.关键词
负温混凝土/含气量/龄期/孔结构/抗渗性Key words
minus temperature concrete/air content/age/pore structure/permeability resistance分类
建筑与水利引用本文复制引用
张瑞稳,王起才,张戎令,代金鹏..−3℃养护下引气混凝土孔结构与抗渗性研究[J].铁道科学与工程学报,2018,15(5):1147-1154,8.基金项目
长江学者和创新团队发展计划滚动支持资助项目(IRT15R29) （IRT15R29）
国家自然科学基金资助项目(51268032) （51268032）
