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Çѱ¹±¸Á¶¹°Áø´ÜÀ¯Áö°ü¸®°øÇÐȸ ³í¹®Áý , Vol.28 No.5(2024-10) |
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¿øÀڷ¹ßÀü¼Ò; ÄÜÅ©¸®Æ®; ź»êÈ; XRF; TG-DTA ; Nuclear power plant; Concrete; Carbonation; XRF; TG-DTA |
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ÀÌ ¿¬±¸´Â OPC¿Í FA¸¦ »ç¿ëÇÑ ½Ã¸àÆ® ÆäÀ̽ºÆ®¸¦ ´ë»óÀ¸·Î ÃËÁøź»êÈ ½ÇÇèÀ» ¼öÇàÇÏ°í, ź»êÈ µÈ ÆäÀ̽ºÆ®ÀÇ ¼ººÐºÐ¼®À» ÅëÇØpH ¿¹Ãø¹æ¹ýÀÇ »ó°ü¼ºÀ» µµÃâÇÏ¿´´Ù. TG-DTA¸¦ ÀÌ¿ëÇÏ¿© ¿ºÐÇØ·Î ÀÎÇÑ Áß·®º¯È ºÐ¼®°ú XRF¸¦ ÀÌ¿ëÇÑ ¼ººÐºÐ¼®À» ¼öÇàÇÏ¿´À¸¸ç, °¢°¢ÀǽÇÇø°á°ú¿Í pH ÃøÁ¤°á°ú¿¡ ´ëÇÑ ºñ±³°ËÅ並 ¼öÇàÇÏ¿´´Ù. ÀÌ ¿¬±¸¿¡¼´Â CO2¿Í CaOÀÇ ¼ººÐºñ, ź»êÄ®½·°ú ¼ö»êÈÄ®½·ÀÇ ¼ººÐºñ¿Í pH°£ÀÇ »ó°ü¼º ºÐ¼®¹æ¹ýÀ» Á¦¾ÈÇÏ¿´´Ù. XRF·Î ÃøÁ¤µÈ CO2¼ººÐ°ú pH°£ÀÇ °ü°è¸¦ ºÐ¼®ÇÑ °á°ú, ¸ðµç ¹èÇÕÀÇ »ó°ü°è¼ö°¡ ¸ðµÎ 0.84 ÀÌ»óÀ¸·Î ³ôÀº »ó°ü¼ºÀ» ³ªÅ¸³Â´Ù. TG-DTA¸¦ ÅëÇÑ Åº»êÄ®½·°ú ¼ö»êÈÄ®½·¿¡ ´ëÇÑ pHÀÇ »ó°üºÐ¼®°á°ú, ź»êÄ®½·¿¡ ´ëÇÑ »ó°ü°è¼ö´Â ¸ðµç ¹èÇÕ¿¡¼ 0.86 ÀÌ»óÀ¸·Î³ªÅ¸³µ´Ù. ´Ù¸¸ ¼ö»êÈÄ®½·°ú pH°£ÀÇ »ó°ü°è¼ö°¡ ³·°Ô ³ªÅ¸³ª µÎ ¼ººÐºÐ¼®°á°úÀÇ ºñÀ²À» ÀÌ¿ëÇÏ¿© pH¿ÍÀÇ »ó°ü°ü°è¸¦ ºÐ¼®ÇÏ¿´´Ù. |
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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. |