C-S-H is a dominant hydration product of cementitious materials. Therefore, its chemical composition and physical properties affect the properties of concrete. With regard to the pore structure of C-S-H, it is known that the gel pore volume of C-S-H is 28% and the gel pore size is about 2nm. However, the gel pore of C-S-H generated from various materials, such as cement, blast furnace slag, fly ash and silica fume have not been completely clarify. Therefore, the purpose of this study is to estimate chemical composition and gel pore of C-S-H, such as pore volume and pore size distribution.
From the experimental results, The gel pore volume of C-S-H was affected by the C/S ratio. Based on the composition of C-S-H, the inversely relationship between the gel volume and the C/S ratio of C-S-H was clarified. And, it was clarified that the gel pore size distribution of C-S-H was not influenced by the change of the C/S ratio from these results.
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