海洋环境下干湿循环对结构混凝土性能影响的研究现状、存在问题及其发展趋势  

Research Status,Exist Problems and Development Trend on the Effect of the Dry-wet Cycles on the Properties of the Structure Concrete in the Marine Environment

作　　者：沈骏[1,2] 袁梦[1,2] 闫敏[1,2] 欧阳峰[1,2] 陈达[1,2] 吕超凡[1,2] 

机构地区：[1]河海大学海岸灾害与防护教育部重点实验室,南京210098 [2]河海大学港口海岸与近海工程学院,南京210098

出　　处：《硅酸盐通报》2017年第6期1929-1938,共10页Bulletin of the Chinese Ceramic Society

基　　金：江苏省杰出青年基金支持项目(2015-BK20150037)

摘　　要：干湿循环是导致干湿交替区混凝土劣化的主要原因。从海洋环境下干湿循环区结构物易遭受干湿循环-环境因素耦合作用破坏的现状出发,针对干湿循环破坏机理、影响干湿循环下混凝土性能的因素、干湿循环与环境因素耦合下混凝土力学性能、耐久性能演变规律等几个方面,对干湿循环影响海洋环境下结构物性能的研究现状进行了归纳与总结。分析了此研究领域存在的问题,提出了加强干湿循环条件、干湿循环-碱骨料反应共同作用对混凝土长期性能演化规律的研究,引入能更加准确反映干湿循环下混凝土材料力学性能损伤程度的指标,深入研究三轴应力状态下混凝土性能损伤变化规律等新的研究思路。The dry-wet cycles is one of main reasons causing the degradation of the properties of the structure concrete in the dry-wet alternate zone. The structures of the dry-wet alternate zone in the marine environment are easily damaged by the coupling effect of the environmental factors and the dry-wet cycles. This article presents a review of research on the effects of the dry-wet cycles on the properties of the structures under the marine environment from three aspects, i.e. the mechanism of the damage under the dry-wet cycles, the influence factors of the dry-wet cycles, the evolution law of the mechanical and the durability properties under the combined action of the dry-wet cycles and the environmental factors. Moreover, the existing problems in this research field are analyzed. Some new research ideas about the effects of the dry-wet cycles on the properties of the structures under the marine environment are proposed. First, the study on the effect of the conditions of the dry-wet cycles on the evolution of the properties in the concrete under the dry-wet cycles needs to increase. Second, the evolution law of the mechanical properties of the concrete under the combined action of the dry-wet cycles and the alkaliaggregate reaction needs further research. Then, the new index must propose to more accurately reflect the damage degree of the mechanical properties under the dry-wet cycles. Finally, the evolution of the long-term properties of the concrete under the three axis stress must be tested.

关 键 词：干湿循环 海洋环境 研究现状 存在问题 发展趋势 

分 类 号：TU528[建筑科学—建筑技术科学]