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

发布时间：2018-04-09 04:18

本文选题：干湿循环　切入点：海洋环境　出处：《硅酸盐通报》2017年06期

【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。
[Abstract]:Dry and wet circulation is the main cause of concrete deterioration in dry-wet alternate zone.Based on the present situation that structures in dry-wet circulation zone are liable to be destroyed by coupling action of dry-wet cycle and environmental factors under marine environment, according to the failure mechanism of dry-wet cycle, the factors that affect the performance of concrete under dry-wet cycle are discussed.In this paper, the mechanical properties of concrete under the coupling of dry and wet cycles with environmental factors, and the evolution law of durability are summarized and summarized in this paper, and the research status of the effects of dry and wet cycles on the properties of structures in marine environment is summarized and summarized.The existing problems in this research field are analyzed, and the study on the long-term performance evolution of concrete by strengthening the dry and wet cycle conditions and the combined action of dry and wet cycle and alkali aggregate reaction is put forward.This paper introduces an index which can more accurately reflect the damage degree of mechanical properties of concrete materials under dry and wet cycling, and further studies the damage law of concrete performance under triaxial stress, and so on.
【作者单位】：河海大学海岸灾害与防护教育部重点实验室;河海大学港口海岸与近海工程学院;
【基金】：江苏省杰出青年基金支持项目(2015-BK20150037)
【分类号】：TU528

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