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Influence of concrete structure damage exposed to test environment and 40% flexural loading
Author(s): 
Pages: 53-55,71
Year: Issue:  11
Journal: Concrete

Keyword:  弯曲荷载试验环境盐湖卤水相对动弹模量;
Abstract: 研究了C30、C50和C80SF10构件在盐湖卤水浸泡、现场暴露环境,无荷载和40%弯曲荷载条件下,相对动弹模量变化规律,及其微观结构演变过程.结果表明:混凝土构件在腐蚀环境下,其损伤过程包括上升阶段和下降阶段.与现场暴露环境相比,盐湖卤水浸泡加速了混凝土构件的应力腐蚀;混凝土构件在现场暴露环境下的损伤过程极其缓慢.施加40%弯曲荷载混凝土构件相对动弹性模量急剧下降,趋势显著.混凝土的强度等级越高混凝土构件损伤过程越长,利用电镜分析其腐蚀产物为钙矾石和石膏,会导致混凝土构件开裂.盐湖卤水-40%弯曲荷载是加速混凝土构件损伤的有效方法.
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