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Title |
Correlation Study of Carbonation Analysis Methods for Cement Paste with Fly Ash
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Authors |
서은아(Eun-A Seo) ; 이호재(Ho-Jae Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.5.54 |
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Keywords |
원자력발전소; 콘크리트; 탄산화; XRF; TG-DTA Nuclear power plant; Concrete; Carbonation; XRF; TG-DTA |
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Abstract |
This study conducted accelerated carbonation experiments on cement pastes using OPC and FA. It derived the correlation of pH prediction methods through component analysis of the carbonated pastes. Analysis of weight change due to thermal decomposition was performed using TG-DTA, and component analysis was conducted using XRF. A comparative review of each experimental result and pH measurement result was carried out.
The study proposed a correlation analysis method between the component ratio of CO2 and CaO, the component ratio of calcium carbonate and calcium hydroxide, and pH. By analyzing the relationship between the CO2 components measured by XRF and pH, the correlation coefficients of all mixtures were 0.84 or higher, indicating a strong correlation.The correlation analysis of calcium carbonate and calcium hydroxide with pH using TG-DTA showed that the correlation coefficient for calcium carbonate was more than 0.86 for all formulations. However, the correlation coefficient between calcium hydroxide and pH was low, so a study was conducted to analyze the correlation with pH using the ratio of the results of the two components.
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