Evaluation of the Crystal Structure of C-A-S-H in the Zeolite and Tobermorite Formation Zone

This paper reports on the chemical behavior of the C-A-S-H, tobermorite, and zeolite,. C-A-S-H, zeolite and tobermorite blend gel were prepared with different temperature (80℃ and 120℃) and characterized by Ca/Si ratio. As a result, the formation of zeolite structure was suppressed and the formation of C-A-S-H was more likely to occur as the amount of Ca added increased at both temperatures. In addition, the three-dimensional network bonding of SiO4 and AlO4 tetrahedra caused by zeolite was more likely to occur at high temperatures than at low temperatures, and the zeolite framework structure was more likely to be maintained. In addition, regardless of the temperature conditions, when the Ca/Si ratio in the system was 0.4, the bonding states of the products, SiO4 tetrahedrons, and AlO4 tetrahedrons in the system were similar. © 2024 The Society of Materials Science, Japan.