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The influence of steel fiber on water permeability of concrete under sustained compressive load
Construction and Building Materials ( IF 7.4 ) Pub Date : 2020-01-16 , DOI: 10.1016/j.conbuildmat.2020.118058
Dong Li , Shi Liu

In order to investigate the influence of steel fibers on the water permeability of concrete at serviceability stage, a self-designed device was adopted and the permeability test was conducted on hollow cylindrical specimens under a sustained compressive load. The combined effect of steel fiber and compressive load on water permeability of concrete was analyzed. Ultrasonic pulse velocity was also measured to verify the damage of the concrete caused by the compressive load. The results demonstrated that the water permeability of the concrete was affected by the compressive load, a significant increment in the permeability coefficient occurred when the applied load exceeded the threshold value. The addition of steel fiber demonstrated positive effects on permeability of concrete under compressive load. The threshold value corresponding to permeability properties of the concrete under compressive load was improved with the increasing of fiber content. The ultrasonic pulse velocity of the concrete under compressive load was also influenced by addition of steel fiber. The variation of the ultrasonic pulse velocity has a certain similarity with the variation of the permeability coefficient of the specimen under compressive load. Ultrasonic pulse velocity test may be an efficient method to evaluate the permeability of concrete at service load.



中文翻译:

持续压缩荷载下钢纤维对混凝土透水性的影响。

为了研究钢纤维在服役阶段对混凝土的透水性的影响,采用了自行设计的装置,并在持续压缩载荷下对空心圆柱试件进行了渗透性试验。分析了钢纤维和压缩载荷对混凝土透水性的综合影响。还测量了超声波脉冲速度,以验证压缩载荷对混凝土的破坏。结果表明,混凝土的水渗透性受压缩载荷的影响,当施加的载荷超过阈值时,渗透系数显着增加。钢纤维的添加显示了在压缩载荷下对混凝土渗透性的积极影响。随着纤维含量的增加,对应于混凝土在渗透压下的渗透性能的阈值有所提高。压缩载荷下混凝土的超声脉冲速度也受钢纤维添加的影响。超声脉冲速度的变化与试样在压缩载荷下的渗透系数的变化具有一定的相似性。超声脉冲速度测试可能是一种评估在使用载荷下混凝土渗透性的有效方法。超声脉冲速度的变化与试样在压缩载荷下的渗透系数的变化具有一定的相似性。超声脉冲速度测试可能是一种评估在使用载荷下混凝土渗透性的有效方法。超声脉冲速度的变化与试样在压缩载荷下的渗透系数的变化具有一定的相似性。超声脉冲速度测试可能是一种评估在使用载荷下混凝土渗透性的有效方法。

更新日期:2020-01-17
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