실리카흄 및 석고 혼입에 따른 천연수경성석회의 수화특성
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작성자 관리자 조회 192회 학술자명 한국자원공학회 권/호 53(6) 개재년도 2016 작성일 23-10-24 16:06본문
실리카흄 및 석고 혼입에 따른 천연수경성석회의 수화특성
문기연, 최문관, 조계홍, 조진상*,홍창우, 권우택, 안지환
In the present study, the effects of adding a inorganic admixture such as silica fume (SF) and anhydrite to natural hydraulic lime (NHL) on hydration properties were systematically investigated. NHL was produced using domestic low-grade limestone. The hydration properties of NHL pastes were then investigated as a function of the hydration time and mixing ratio of mineral admixture. Through an investigation of the hydration properties of NHL pastesmixed with SF and anhydrite, C-S-H compounds and CaCO3 were observed. According to adding anhydrite, the formation of C-S-H hydrates was slightly delayed, but CaCO3 was created more than other specimen. The compressive strength was increased by the mixing of the silica fume, and optimum mixing ratio was about 20%. The compressive strength was increased more higher than other mortars from curing 7 days by addition of anhydrite, it was increased to maximum 10.2 MPa at 28 days.
keyword : Natural hydraulic lime, Low-grade limestone, Silica fume, Anhydrite, Waste recycling |