2022 Volume 76 Issue 1 Pages 10-18
This paper reports on the evaluation interlayer structure of a sample transformed from 1.4nm Tobermorite to 1.1nm Tobermorite with a single chain structure by heat treatment using the isosteric heat of water adsorption calculated from low-pressure water vapor adsorption isotherms. In the isosteric heat of adsorption, there was a difference in the appearance of peaks between the tobermorite and C-S-H samples, suggesting that the regularity of the crystal structure and the uniformity of the Si chain structure affect the bimodal peaks in the heat of adsorption. In addition, an increase in the heat of adsorption was observed in the Mg-added sample, which was attributed to the high-water content and high hydration energy of Mg2＋ ions.
