| Title |
Analysis of Carbonation Mineral Phase and Compressive Strength according to CO2 Curing of Calcium Silicate Cement |
| Authors |
이향선(Lee, Hyang-Sun) ; 송훈(Song, Hun) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.10.271 |
| Keywords |
Calcium Silicate Cement; Mineral Carbonation; CO2 curing; Compressive Strength |
| Abstract |
The cement industry is responsible for approximately 10% of greenhouse gas (GHG) emissions in the industrial sector, with most emissions
occurring during the cement clinker production process. To address this issue, the cement industry is making efforts to reduce GHG
emissions by developing technologies such as raw material substitution, improving process efficiency using new low-carbon heat sources, and
employing CO2 capture and utilization techniques. This study conducted foundational experiments to contribute to the reduction of CO2
emissions in the cement industry by utilizing a CO2 recycling technology called mineral carbonation. In this study, calcium silicate
cement(CSC) was manufactured at the laboratory scale to convert CO2 into a mineral form, and analysis was performed on the carbonate
mineral phase and strength development. The manufacturing and analysis results of CSC clinker confirmed the formation of key minerals,
namely wollastonite and rankinite. Furthermore, through CO2 curing of CSC, carbonate minerals including calcite and aragonite were formed.
The compressive strength measurements of carbonated CSC paste specimens confirmed the development of strength. In conclusion, this study
demonstrates the feasibility of CSC production and the manifestation of compressive strength through CO2 generation, contributing to the
potential reduction of CO2 emissions in the cement industry. |