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CO2 °íÁ¤ ŻȲ¼®°í¸¦ »ç¿ëÇÑ °í·Î½½·¡±× ¹ÌºÐ¸»ÀÇ Æ¯¼º ¹× ÇöÀå½ÇÁõ / Basic Characteristics and Field Demonstration Test of Ground Granulated Blast Furnace Slag using CO2 Fixed Desulfurized Gypsum |
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Çѱ¹°Ç¼³¼øȯÀÚ¿øÇÐȸ ³í¹®Áý, Vol.12 No.3 (2024-09) |
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½ÃÀÛÆäÀÌÁö(281) ÃÑÆäÀÌÁö(9) |
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ŻȲ¼®°í; CO2 °íÁ¤; °í·Î½½·¡±× ¹ÌºÐ¸»; ÀçÈ°¿ë; ÇöÀå½ÇÁõ ; Desulfurized gypsum; CO2 fixation; Ground granulated blast furnace slag; Recycling; Field demonstration test |
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º» ¿¬±¸¿¡¼´Â CO2 °íÁ¤È ŻȲ¼®°í(CFDG)¸¦ °í·Î½½·¡±× ¹ÌºÐ¸»¿¡ Àû¿ëÇÏ¿© ¸ð¸£Å¸¸£ ¹× ÄÜÅ©¸®Æ®ÀÇ ±âÃÊ ¹°¼ºÀ» °ËÅäÇÏ¿´À¸¸ç, ÇöÀå½ÇÁõÀ» ÅëÇÑ Àû¿ë¼º Æò°¡¸¦ ÁøÇàÇÏ¿´´Ù. CFDG´Â ŻȲ¼®°í(DG) ´ëºñ °áÁ¤»óÀÌ ºñ±³Àû µÕ±Ù Çü»óÀ» ¶ç¸ç, ÁÖ¿ä ±¸¼º¼ººÐÀ¸·Î´ÂCaO ¹× SO3ÀÌ´Ù. È°¼ºµµ Áö¼ö ¹× ÄÜÅ©¸®Æ® ½ÇÇè °á°ú, Ç÷οì´Â Áõ°¡ÇÏ´Â °æÇâÀ̸ç, ¾ÐÃà°µµ´Â µ¿µî ¼öÁØÀ» ¹ßÇöÇÏ¿´°í, ±â°èÈ°æÀ۷ο¡ Àû¿ëÇϱâ À§ÇÑ ÄÜÅ©¸®Æ®ÀÇ ¸ñÇ¥ ¹°¼ºÀÎ ½½·³ÇÁ 120¡¾25 mm, ¾ÐÃà°µµ 24 MPa¿¡ ´ëÇÏ¿© ¸¸Á·ÇÏ¿´´Ù. 24³âµµ 2¿ù ´çÁø½Ã¼®¹®¸é¿¡¼ ±â°èÈ °æÀÛ·Î ÇöÀå½ÇÁõÀ» ÁøÇàÇÏ¿´À¸¸ç, ¾ç»ýÁ¶°Ç¿¡ µû¸¥ ¾ÐÃà°µµ, ±»Áö¾ÊÀº ÄÜÅ©¸®Æ®ÀÇ ¹°¼º ¹× ³»±¸¼º °ËÅä °á°ú±âÁ¸ Ÿ¼³µÇ¾îÁö´Â ·¹¹ÌÄÜ°ú À¯»ç ¼º´ÉÀ» º¸ÀÌ°í, KS ±Ô°Ý ¹× ½Ã¸àÆ® ÄÜÅ©¸®Æ® Æ÷Àå°ø»ç ±Ô°ÝÀ» ¸¸Á·ÇÏ¿© °í·Î½½·¡±× ¹ÌºÐ¸»(GGBS) ÀÇ ÀÚ±ØÀç·Î½á DG¸¦ CFDG·Î ´ëü°¡´ÉÇϸç, »ç¿ë¿¡ µû¸¥ ź¼Ò Àú°¨À» ±â´ëÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î »ç·áµÈ´Ù. |
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In this study, CO2-immobilized desulfurized gypsum(CFDG) was applied to ground granulated blast furnace slag to examine the basic properties of mortar and concrete, and to evaluate its responsiveness through field demonstration test. CFDG had a relatively circular composition compared to desulfurized gypsum(DG), and its main components were CaO 47.6 % and SO3 22.1 %. As a result of mortar and concrete tests, the flow tended to increase and the compressive strength was at the same level. In addition, the target properties of concrete for application to farm roads, which were a slump of 120¡¾25 mm and a compressive strength of 24 MPa, were satisfied with a slump of 135 mm and a compressive strength of 42.1 MPa at 28 days. In February 2024, an on-site demonstration of a farm road was conducted in Seongmun-myeon, Dangjin-si, and as a result of reviewing the compressive strength according to curing conditions, the physical properties and durability of unhardened concrete, the target results were satisfied, expanding the use of CFDG by applying fine powder of blast furnace slag and carbon reduction can be expected. |