SHSRA混凝土减缩剂性能研究  

Performance of SHSRA shrinkage reducing admixtures of concrete

作　　者：张夏虹[1] 李超[1] 王迎飞[1] 王胜年[1] 

机构地区：[1]中交四航工程研究院有限公司,水工构造物耐久性技术交通行业重点实验室中交集团建筑材料重点实验室,广东广州510230

出　　处：《水运工程》2010年第10期45-49,共5页Port & Waterway Engineering

摘　　要：对掺有自主开发的SHSRA减缩剂的新拌混凝土工作性、硬化混凝土的干燥收缩、水化热及混凝土的强度等进行试验,并与未掺减缩剂的基准混凝土进行了对比,试验证明,SHSRA的掺入对新拌混凝土的工作性和混凝土后期强度没有负面影响,并可大大降低了混凝土的干缩率,28d减缩率达40%,且可减缓胶凝材料水化反应速率,降低水化热,可以明显提高混凝土的抗裂性能。We have developed a product called SHSRA and contrast experiments involved in the workability,drying shrinkage,the hydration heat tests and strength of concrete with or without SHSRA were carried out.The results showed the addition of SHSRA had no negative effect on the concrete workability and the later strength and could reduce the dry shrinkage percentage of 40% after 28 days.Besides,the hydration rate of the cementing material with SHSRA would be slowed down and the hydration heat could be decreased which would improve the crack resistance of the concrete.

关 键 词：减缩剂(SRA) 高性能混凝土(HPC) 干燥收缩 抗裂性能 

分 类 号：TU214.18[建筑科学—建筑设计及理论]