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Title |
Compressive Strength and Durability of Cement Mortar Mixed with Industrial By-products for OPC Replacement
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Authors |
양영섭(Young-Sub Yang) ; 김봉균(Bong-Kyun Kim) ; 이병재(Byung-Jae Lee) ; 김윤용(Yun-Yong Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.6.198 |
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Keywords |
산업부산물; 탄소저감; 플라이애시; 실리카퓸; 고로슬래그미분말 Industrial by-products; Carbon reduction; Fly ash; Silica fume; Blast furnace slag powder |
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Abstract |
This study investigated the carbon emissions, compressive strength, and durability of 3DP mortar using various industrial by-products such as blast furnace slag powder, silica fume, and fly ash. The strength test results showed that the higher the mixing ratio of silica fume than fly ash, the higher the strength. Even when 65∼70% of the binder was replaced with industrial by-products, it showed a compressive strength of over 24 MPa.
The pH test results showed an overall pH of 9.80∼12.11, showing slightly lower alkalinity than general cement mortar (12.28∼12.33). The chloride ion penetration resistance test results showed that the C-series with high OPC content showed the highest salt resistance. The freeze-thaw test results showed that when blast furnace slag powder was mixed, the relative dynamic elastic modulus was over 80%, which was superior to the mixture without blast furnace slag powder. The amount of CO2 emission from OPC were found to be 98.5?99.1% of that of mortar.
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