既有混凝土结构碱集料反应耐久性评定  

Assessment of alkali-aggregate reaction of existing concrete structures durability

作　　者：孙彬[1] 王景贤[1] 邸小坛[1] 韩继云[1] 

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《混凝土》2015年第4期37-40,48,共5页Concrete

摘　　要：随着既有结构混凝土碱集料反应问题不断出现,对既有混凝土结构碱集料反应耐久性检测技术与评定方法进行研究。通过试验研究与理论分析,提出了既有结构混凝土中可溶性碱含量确定方法;根据耐久性极限状态的确定原则,提出了既有结构碱集料反应耐久性极限状态标准;根据碱集料反应条件和耐久性损伤特点,给出了既有结构混凝土碱集料反应耐久性评定方法;结合实际工程应用,对其可行性和有效性进行验证。With problems of alkali-aggregate reaction of existing concrete structures,research on detection technique and assessment methods of durability for alkali-aggregate reaction of existing concrete structure was developed. By experimental study and theoretical analysis,method for determining soluble alkali content in existing concrete structure was put forward. According to the determining principle of durability limit state,criteria of durability limit state for alkali-aggregate reaction of existing structures was suggested.According to conditions and durability damage characteristics of alkali-aggregate reaction,durability assessment method of alkali-aggregate reaction was given for existing concrete structures. Combined with a practical engineering application,feasibility and validity were verified.

关 键 词：既有结构 混凝土 碱集料反应 耐久性 评定 

分 类 号：TU528.01[建筑科学—建筑技术科学]