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http://dx.doi.org/10.5345/JKIBC.2020.20.2.123

Purity of γ-Dicalcium Silicate with Synthetic and Raw Materials Conditions  

Lee, Seok-Hee (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Cho, Hyeong-Kyu (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korea Institute of Building Construction / v.20, no.2, 2020 , pp. 123-128 More about this Journal
Abstract
γ-dicalcium silicate(γ-C2S) is known as a polymorphism of belite. Due to its high CO2 fixing capacity and the production process with low CO2 emission, γ-C2S has attracted more attention of researchers. For the further development of γ-C2S applications in construction industry, this study aims to investigate the method for synthesizing high purity of γ-C2S. The influence of raw materials and calcination temperatures on the purity of γ-C2S was evaluated. Several Ca bearing materials were selected as the calcium source, the materials which's main component is SiO2 were used as the silicon source. Raw materials were mixed and calcined under different temperatures. The results revealed that the highest purity could be obtained using Ca(OH)2 and SiO2 powder as raw materials. In addition, a relatively economic synthesis method using natural mineral materials-limestone and silica sand as raw materials were developed for the practical application. The purity of synthetic γ-C2S was recorded up to 77.6%.
Keywords
${\gamma}$-dicalcium silicate; synthetic; $CO_2$; ${\gamma}-C_2S$;
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