An experimental study on the flexural behavior of RC member under long-term calcium leaching degradation

IF 3 Q2 ENGINEERING, CIVIL
So-Yeong Choi, Il-Sun Kim, E. Yang
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引用次数: 0

Abstract

ABSTRACT Calcium leaching degradation could be happened in RC members due to the contact with pure water in underground conditions. And it is used that concrete with improved durability by using mineral admixture in the underground structures. Thus, it is needed to evaluate the resistance of calcium leaching for underground concrete mixed with mineral admixtures. In this study to evaluate the effects of long-term calcium leaching on the RC members mixed with mineral admixture are investigated. From the test results, when the RC member is attacked by calcium leaching, the yield load decreased, and the deflection at this time increased. And, the moment at the time of the inflection point of curvature decreased as well. Also, while a continuous decrease in compressive strength occurred with leaching period, the yield point and deflection value of an RC member with relatively low water binder ratio and low replacement ratio of mineral admixture as binder did not show significant changes. Consequently, when the concrete is applied to the underground structure which is exposed to a calcium leaching environment, it is not desirable to use high water-binder ratio or a large amount of mineral admixture as binder.
长期钙浸降解作用下RC构件抗弯性能的试验研究
摘要钢筋混凝土构件在地下条件下与纯水接触,可能发生钙浸出降解。并将矿物掺合料提高混凝土耐久性应用于地下结构中。因此,有必要评估掺有矿物掺合料的地下混凝土的抗钙浸出性。本研究旨在评估长期钙浸出对掺有矿物掺合料的RC构件的影响。从试验结果来看,当RC构件受到钙浸出的侵蚀时,屈服载荷减小,此时的挠度增大。并且,在曲率拐点的时刻也减小了。此外,虽然抗压强度随着浸出时间的推移而持续下降,但水胶比相对较低、矿物掺合料替代率较低的RC构件的屈服点和挠度值没有显示出显著变化。因此,当混凝土应用于暴露于钙浸出环境的地下结构时,不希望使用高的水-粘结剂比率或大量的矿物混合物作为粘结剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.90
自引率
9.50%
发文量
24
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