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Title |
Quantitative Analysis of X-Ray Fluorescence for Understanding the Effect of Elevated Temperatures on Cement Pastes
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Authors |
전길송(Kil-Song Jeon) ; 허영선(Young-Sun Heo) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.6.130 |
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Keywords |
화재; 구조물 진단; 시멘트 페이스트; 화학분석; X선 형광분석 Fire; Structural maintenance; Cement paste; Chemical analysis; X-ray fluorescence |
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Abstract |
By using XRF (X-ray fluorescence), this study investigates the variation of chemical properties in cement pastes at elevated temperatures. High-temperature conditions were prepared by using an electric furnace, planning a total of 11 target temperatures ranging from room temperature to 1000 ℃. A standard library of geo-quant basic was applied for the analysis of 12 elements in cement paste, including Ca, Si, Al, Fe, S, Mg, Ti, Sr, P, Mn, Zn and K. The results revealed that, as the temperature increased, the proportion of each element in the cement paste also increased. With the exception of a few elements present in extremely low amounts in the cement pastes, the variation in the composition ratio of most elements exhibited a strong correlation with temperature, with an R-squared value exceeding 0.98. In this study, cement pastes exposed to normal and high-temperature environments were compared. The authors established that the reasons for the different results in this comparison can be explained from the same perspective as when comparing raw cement with cement paste. Furthermore, this study discussed the potentially most dominant parameter when investigating the properties of cement paste using XRF.
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