Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4913888 | Construction and Building Materials | 2016 | 14 Pages |
Abstract
Moreover, an empirical theory on mechanism of hydration development is proposed in the current study based on experimental observations. Average Young's modulus of condensed cement powder was changed from about 15Â GPa, for unhydrated state, to 11.3Â GPa after two hours of hydration in water environment. The average roughness trend was also altered from 8.31Â nm to 18.2Â nm during hydration process. Results show that the cement hydration rate in nano-silica solution is much higher than water environment. Moreover transition zone between C-S-H colonies have much higher mechanical properties than the hardest colonies in every ages. In the presence of nano-silica, transition zone has a width of less than 10Â nm and a surface area of 5% of the overall surface area.
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Civil and Structural Engineering
Authors
Hamed Asgari, Aliakbar Ramezanianpour, Hans-Jürgen Butt,