粉煤灰对高性能砼收缩开裂性能影响试验研究  

Experimental Study on Shrinkage-cracking Property of HPC by Flyash

作　　者：黄焕谦[1] 王迎飞[2] 王胜年[2] 黄雁飞[2] 

机构地区：[1]中交集团第四航务工程局有限公司,广东广州510230 [2]广州四航工程技术研究院中港集团建筑材料重点实验室,广东广州510230

出　　处：《水运工程》2007年第1期25-29,共5页Port & Waterway Engineering

摘　　要：设计收缩、小圆环约束开裂、水化热、极限拉伸率以及抗氯离子渗透性等5种试验方法来考核粉煤灰对高性能混凝土收缩开裂性能的影响。研究结果表明:粉煤灰能够改善高性能混凝土的工作性、降低早期弹性模量和水化热、7 d后强度能够快速增长并逼近基准混凝土,能够有效地提高混凝土的抗裂性能。This paper is to analyze the effect on shrinkage-cracking property of HPC by flyash by designing five check-up experiments such as desiccation-shrinkage, small steel rings restraint, hydration heat, ultimate tensile strain, and anti-chloride ion penetration, etc. The results reveal that flyash can improve the workability of HPC and decrease elastic modulus and hydration heat at early age, and promote effectively anti-cracking performance with its compressive strength approaching that of control sample after 7 days.

关 键 词：粉煤灰 收缩开裂 水化热 小圆环法 

分 类 号：TU528[建筑科学—建筑技术科学]