플라이애시가 혼입된 시멘트 페이스트의 탄산화 분석방법에 따른 상관관계 연구
Correlation Study of Carbonation Analysis Methods for Cement Paste with Fly Ash
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초록
이 연구는 OPC와 FA를 사용한 시멘트 페이스트를 대상으로 촉진탄산화 실험을 수행하고, 탄산화 된 페이스트의 성분분석을 통해pH 예측방법의 상관성을 도출하였다. TG-DTA를 이용하여 열분해로 인한 중량변화 분석과 XRF를 이용한 성분분석을 수행하였으며, 각각의실혐결과와 pH 측정결과에 대한 비교검토를 수행하였다. 이 연구에서는 CO2와 CaO의 성분비, 탄산칼슘과 수산화칼슘의 성분비와 pH간의 상관성 분석방법을 제안하였다. XRF로 측정된 CO2성분과 pH간의 관계를 분석한 결과, 모든 배합의 상관계수가 모두 0.84 이상으로 높은 상관성을 나타냈다. TG-DTA를 통한 탄산칼슘과 수산화칼슘에 대한 pH의 상관분석결과, 탄산칼슘에 대한 상관계수는 모든 배합에서 0.86 이상으로나타났다. 다만 수산화칼슘과 pH간의 상관계수가 낮게 나타나 두 성분분석결과의 비율을 이용하여 pH와의 상관관계를 분석하였다.
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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