摘要
以丙烯酰胺,中和度为70%的丙烯酸及亲水性好、接枝活性高的木薯淀粉为原料,合成了一种淀粉接枝混凝土内养护剂。通过红外光谱和XRD分析了该内养护剂的结构特征,通过混凝土性能分析、水化热测试、混凝土内部相对湿度和收缩率测试分析了该内养护剂的性能。结果表明:该内养护剂对混凝土的流动性和含气量无不良影响,且能一定程度提高混凝土的后期强度;同时能有效降低水化热对混凝土结构的破坏作用,明显增大高强混凝土内部的相对湿度、减小混凝土收缩、提高其耐久性。
A starch grafted concrete curing agent was synthesized by acrylamide,acrylic acid whose neutralization was 70%and tapioca starch with good hydrophilicity and high grafting activity.The structural characteristics of the internal curing agent were analyzed by infrared spectroscopy and XRD,meanwhile its properties were analyzed by concrete performance analysis,hydration heat measurement,concrete internal relative humidity and shrinkage test.The results show that the internal curing agent has no adverse effect on the fluidity and gas content of concrete,and can improve the late strength of concrete to a certain extent.At the same time,the curing agent can effectively reduce the damage of concrete by hydration heat,obviously improve the relative humidity inside high-strength concrete,reduce concrete shrinkage and improve durability.
作者
郭睿
汪焮成
雷丽君
熊龙
赵日煦
GUO Rui;WANG Xincheng;LEI Lijun;XIONG Long;ZHAO Rixu(China Construction Ready Mixed Concrete Co.Ltd.,Wuhan 430205,China;Hubei Provincial Department of Transportation Engineering Quality Supervision Bureau Co.Ltd.,Wuhan 430014,China)
出处
《新型建筑材料》
北大核心
2020年第10期81-84,共4页
New Building Materials
关键词
淀粉接枝
丙烯酸丙烯酰胺
混凝土内养护剂
水化热
收缩率
耐久性
starch grafting
acrglic aciel and acrylamide
concrete curing agent
hydration heat
shrinkage
durability
作者简介
郭睿,女,1992年生,硕士,助理工程师。地址:武汉市东湖高新技术开发区佛祖岭1路19号中地大科技园11栋,E-mail:gruing@163.com。
