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Title |
Effect of Early Curing Temperatures on Compressive Strength Development of Bottom Ash Aggregate Concrete
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Authors |
이혜진(Hye-Jin Lee) ; 김학영(Hak-Young Kim) ; 양근혁(Keun-Hyeok Yang) ; 전용수(Yong-Soo Jeon) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.6.561 |
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Keywords |
바텀애시 골재; 압축강도 발현; 초기 재령; 양생온도; fib 모델 bottom ash aggregate; compressive strength development; early age; curing temperature; fib model |
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Abstract |
The present study aimed to examine the compressive strength development of precast bottom ash aggregate (BAA) concrete cured under high temperatures at early age. The main parameters investigated were the natural aggregate content for replacing bottom ash fine and coarse particles, and curing temperature histories up to the age of 1 day. The empirical equations to estimate the compressive strength development of BAA concrete were formulated by using the maturity function specified in the fib model considering the curing temperature histories. Test results showed that higher compressive strengths were commonly obtained at early ages and at 28 days for concrete cured under 60 °C for 12 hrs; the values were higher by 2~10 % only than those measured for concrete under 60 °C for 8 hrs. The means of the ratios between the predictions using the proposed equations and the experimental compressive strengths were 1.05, 0.96, and 1.03 at ages of 1, 3, and 91 days, respectively, indicating that the equations can be useful for estimating the compressive strength development of precast BAA concrete.
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