Estimation of mass transfer in hardened cementitious materials based on the properties of hydration products

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The purpose of this study is to formulate the prediction method of mass transfer in concrete based on the properties of hydration products. Composition and physical properties of C-S-H, which is dominant hydration products of cementitious materials, were studied. From the experimental results, the relation between density of C-S-H and C/S molar ratio and the relation between specific surface area of C-S-H and C/S molar ratio were formulated as linear equations respectively independent of source of C-S-H. Diffusion coefficients oxygen and chloride ion through concrete can be predicted by using of the surface area of C-S-H and the volume of micro pore.