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首页> 外文期刊>Advances in materials science and engineering >Analysis Technique on Water Permeability in Concrete with Cold Joint considering Micro Pore Structure and Mineral Admixture
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Analysis Technique on Water Permeability in Concrete with Cold Joint considering Micro Pore Structure and Mineral Admixture

机译：考虑微孔结构和矿物掺合料的冷缝混凝土渗透率分析技术

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摘要

Cold joint in concrete due to delayed concrete placing may cause a reduced shear resistance and increased water permeation. This study presents an analytical model based on the concept of REV (Representative Element Volume) to assess the effect of water permeability in cold joint concrete. Here, OPC (Ordinary Portland Cement) concrete samples with cold joint are prepared and WPT (Water Permeability Test) is performed on the samples cured for 91 days. In order to account for the effect of GGBFS (Granulated Ground Blast Furnace Slag) on water permeability, concrete samples with the same W/B (Water to Binder) ratio and 40% replacement ratio of GGBFS are tested as well. Utilizing the previous models handling porosity and saturation, the analysis technique for equivalent water permeability with effective cold joint width is proposed. Water permeability in cold joint increases to 140.7% in control case but it decreases to 120.7% through GGBFS replacement. Simulation results agree reasonably well with experimental data gathered for sound and cold joint concrete.
机译：由于延迟浇筑混凝土而引起的混凝土冷缝可能会导致抗剪强度降低和透水性增加。这项研究提出了一种基于REV（代表性元素体积）概念的分析模型，以评估冷缝混凝土中水渗透性的影响。在这里，准备了带有冷缝的OPC（普通波特兰水泥）混凝土样品，并对固化91天的样品进行了WPT（水渗透性测试）。为了说明GGBFS（粒状高炉矿渣）对水渗透性的影响，还测试了具有相同W / B（水与粘合剂）比和40％GGBFS替代比的混凝土样品。利用先前处理孔隙度和饱和度的模型，提出了具有有效冷缝宽度的等效透水率分析技术。在对照例中，冷缝的透水率增加到140.7％，但是通过更换GGBFS降低到120.7％。仿真结果与声音和冷缝混凝土的实验数据相当吻合。

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