改性淀粉作为混凝土缓凝减水剂的性能研究  

Performance Research of Modified Starch as Water-reducing Retarder for Concrete

作　　者：赵平[1] 严云[1,2] 胡志华[1,2] 

机构地区：[1]西南科技大学材料科学与工程学院,绵阳621010 [2]四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,西南科技大学,绵阳621010

出　　处：《混凝土与水泥制品》2012年第7期1-5,共5页China Concrete and Cement Products

基　　金：国家科技支撑计划重大项目(2011BAA04B04),国家科技支撑计划(2011BAE14B05)

摘　　要：试验研究了一种改性淀粉作为水泥缓凝减水剂的性能。结果表明,改性淀粉减水剂最佳掺量为0.3%,具有较强的缓凝作用,水泥初期水化反应缓慢,水化诱导期明显延长,有利于水化产物的均匀分布,对胶砂和混凝土的抗压强度有明显的增强作用。The performance of the modified starch as water-reducing retarder for cement is studied by the experiment. The results show that the optimum mix dosage of modified starch is 0.3%. Because of its retarding action, the initial hy- dration of cement is slower and the derivational period of cement hydration is extended, which is in favor of the uniform distribution of hydration products and can significantly improve the compressive strength of cement mortar and concrete.

关 键 词：改性淀粉 减水剂 缓凝 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]