Effect of water loading on strength of concrete
Effect of water loading on strength of concrete
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DOI：
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发表时间：
2007
影响因子：
2.4
通讯作者：
Li Qing-bin
中科院分区：
文献类型：
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作者：
Li Qing-bin
试验研究了水对三轴应力下混凝土抗压强度的影响。试验采用高200 mm、直径100 mm的圆柱形试件，在静三轴试验机上进行。考虑了水加载方式、围压和混凝土含水量等因素的影响。试验采用了两种加载方式。第一种方法是用机械方法对试样施加水的围压，并对试样进行密封以防止水的渗透。在第二种方式中，试件确实受到水载荷，并直接暴露在高水压下。围压为0 ~ 4 MPa。测试进行了干燥和饱和试样。试验结果表明：在试件封闭条件下，三轴应力状态下干态和饱和态混凝土的抗压强度均随机械围压的增大而增大，尤其是干态混凝土。而在未密封条件下，干态混凝土强度显著下降，饱和态混凝土强度与单轴抗压强度基本相当。同时，对混凝土孔压与外荷载相互作用的机理进行了分析。
The effect of water on concrete compressive strength subjected to triaxial stress was experimentally studied. The cylindrical specimens were 200mm high with diameter 100mm, and the test was carried out by using a static triaxial test machine. The effects of the way of water loading, the confining pressure and the moisture of concrete were taken into account. Two ways of water loading were adopted. In the first way, the confining pressure of water was exerted on specimens mechanically and specimens were sealed to prevent from the penetrating of water. In the second way, specimens were really subjected to water loading and exposed to high water pressure directly. The confining pressure was in the range from 0 to 4 MPa. The tests were carried out both for dry and saturated specimens. The results indicate that under the condition of specimens being sealed, the compressive strength of both dry and saturated concrete under triaxial stress increases obviously with the increase of the mechanical confining pressure, especially for dry concrete. Whereas, under the condition of unsealed the strength of dry concrete decrease remarkably, and the strength of saturated concrete is approximately equal to its uniaxial compressive strength. Furthermore, the mechanism of the interaction between pore pressure of concrete and external loading are demonstrated.