-3℃养护下引气混凝土早期胶结强度与冻结强度试验关系研究  

Study on air-entraining concrete early cementation strength and freeze strength test relationship under -3 ℃ curing

作　　者：张瑞稳[1] 王起才[1] 张戎令[1] 代金鹏[1] 张凯[1] 王炳忠[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《混凝土》2017年第5期15-18,共4页Concrete

基　　金：长江学者和创新团队发展计划滚动支持(IRT15R29);国家自然科学基金资助项目(51268032)

摘　　要：研究-3℃养护条件下,引气混凝土早期胶结强度与冻结强度随龄期增长各自的强度变化规律及相互关系,且系统阐述了7、14、28 d胶结强度(冻结强度在常温水容器中完全浸泡4 h后的强度)高于冻结强度的内在原因。另外,分别与标准养护条件下相应龄期强度作对比,得到了早期胶结强度与冻结强度的损失值,在侧面证明了冻结强度高于结构强度(冻结强度在标准养护室空气中缓冻4 h后的强度)的理论事实,同时为冬季施工多雨区及多年冻土区混凝土强度和负温混凝土施工技术提供理论依据。This experiment mainly studies the relationship between early cementation strength and freeze strength of the concrete under the condition of minus temperature（-3 ℃）.And it expounds the internal cause of cementation strength（the strength of freezing strength in normal atmospheric temperature water container completely after 4 h of immersion）at different ages of 7,14,28 d higher than freezing strength.And by comparing with the standard curing conditions of corresponding age of strength,that cementation strength and freezing strength loss of value.At the same time also proved that the freeze strength is higher than the structure strength（the strength of freezing strength in standard curing room air slow frozen after 4 h）in the side.The minus temperature concrete construction technology and in permafrost regions and construction in winter and rainy area concrete strength provide theoretical basis.

关 键 词：龄期 负温混凝土 结构强度 胶结强度 冻结强度 

分 类 号：TU528.064[建筑科学—建筑技术科学]