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首页> 外文期刊>Materials Chemistry and Physics >The relationship between pore structure and chloride diffusivity from ponding test in cement-based materials
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The relationship between pore structure and chloride diffusivity from ponding test in cement-based materials

机译：水泥基材料孔隙试验中孔隙结构与氯离子扩散率的关系

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摘要

In this study, the total chloride contents at different penetration depth were measured after the 90-day ponding test, and the Fick's second law of diffusion was fitted to the data to determine the diffusion coefficient of concrete. The porosity and the continuous pore diameter of the same mortar in concrete were examined with the mercury intrusion porosimetry (MIP) method. The continuous pore diameter was used to assess the connectivity of cement-based materials. The diffusion coefficients obtained from ponding test were compared and correlated with the capillary porosity (pore diameter between 30 and 10000 nm) and the continuous pore diameter from the MIP testing. A good correlation between the capillary porosity and the diffusion coefficient of concrete has been determined. The continuous pore diameter is linearly related to the diffusion coefficient of concrete.
机译：在这项研究中，经过90天的深沉试验后，测量了不同渗透深度下的总氯含量，并将菲克第二扩散定律与数据拟合以确定混凝土的扩散系数。用压汞法（MIP）检查混凝土中相同砂浆的孔隙率和连续孔径。连续孔径用于评估水泥基材料的连通性。比较了通过深浸试验获得的扩散系数，并将其与毛细管孔隙率（孔径在30到10000 nm之间）和MIP试验得到的连续孔径相关。已确定毛细管孔隙率与混凝土的扩散系数之间具有良好的相关性。连续孔径与混凝土的扩散系数成线性关系。

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