改善水泥混凝土本征特性的补偿收缩技术研究进展  

Research progress on shrinkage compensation technology for improving the intrinsic characteristics of cement concrete

作　　者：师海霞[1] 纪宪坤 廉慧珍[3] 王海龙 SHI Haixia;JI Xiankun;LIAN Huizhen;WANG Hailong(China Concrete Industry Association,Beijing Zhonglian Xinhang Building Materials Co.Ltd.,Beijing 100831,China;Wuhan Sanyuan Special Building Material Co.Ltd.,Wuhan 430000,China;Department of Civil Engineering,Tshinghua University,Beijing 100062,China)

机构地区：[1]中国混凝土与水泥制品协会,北京中联新航建材有限公司,北京100831 [2]武汉三源特种建材有限责任公司,湖北武汉430000 [3]清华大学土木工程系,北京100062

出　　处：《新型建筑材料》2021年第12期103-108,共6页New Building Materials

摘　　要：混凝土本质上属于多孔材料,失水收缩也就成为其本征特性。当收缩受到约束时,就会有开裂的敏感性,而混凝土结构中的约束又不可避免,改善这种本征特性根本的措施就是使混凝土产生膨胀去补偿收缩,找到一种可以根据混凝土的水化速率调控补偿收缩能力而又具有相对长效的膨胀剂是可以期望的。对混凝土收缩原因进行了详细分析并结合工程实际着重探究了氧化镁膨胀剂作为补偿混凝土收缩新技术的可行性。Shrinkage due to loss of water is intrinsic character as concrete is porous.When shrinkage is restrained,there will be susceptibility to crack.The fundamental solution is to make concrete expand to compensate for shrinkage.It is expected to find an expansion agent that can adjust and compensate for shrinkage according to the hydration rate of concrete and has a relatively long-lasting effect.The feasibility of magnesium oxide expansion agent as a new technology for compensating concrete shrinkage is discussed based on the detailed analysis of concrete shrinkage causes.

关 键 词：水泥混凝土 本征特性 补偿收缩 可调控 长效 氧化镁膨胀剂 

分 类 号：TU528.042.4[建筑科学—建筑技术科学]