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Title |
Experimental Study and Variable Analysis on the Adiabatic Temperature Rise Characteristics of Concrete Incorporating Ground Granulated Blast Furnace Slag or Fly Ash
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Authors |
윤현도(Hyun-Do Yun) ; 박완신(Wan-Shin Park) ; 장영일(Young-Il Jang) ; 김선우(Sun-Woo Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.1.029 |
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Keywords |
단열온도상승; 고로슬래그 미분말; 플라이 애시; 회귀분석 adiabatic temperature rise; ground granulated blast furnace slag; fly ash; regression analysis |
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Abstract |
This work proposes variables for a regression equation related to the adiabatic temperature rise characteristics of concrete, based on experimental results involving the incorporation of ground granulated blast-furnace slag (GGBFS) or fly ash (FA). To achieve this, 21 concrete mixtures were designed, with key variables including the type of industrial by-product (GGBFS or FA), the cement replacement ratio, and the unit cement content. The cement used in this study was ordinary Portland cement, with Class F FA and three types of GGBFS. The experimental results showed that the 28-day compressive strength of concrete with GGBFS or FA was lower than that of conventional concrete. However, 91-day compressive strength tests confirmed a significant long-term strength development effect. When comparing the impact of different industrial by-products on adiabatic temperature rise characteristics, it was observed that both the final adiabatic temperature rise and the rate of temperature increase were lower in GGBFS-replaced concrete than in FA-replaced concrete. To quantitatively evaluate the rate of adiabatic temperature rise based on the replacement ratio of GGBFS or FA, the experimental results were analyzed through regression, following the equations presented in the standard specifications for mass concrete. The relevant variables were derived, and these variables exhibited a linear relationship with the replacement ratio of GGBFS or FA.
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