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Title |
Concrete Maturity Method Using Variable Temperature Curing: Experimental Study
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Authors |
김태완 ; 김광수 ; 한경봉 ; 박선규 ; 오석민 |
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Keywords |
양생 ; 수화 ; 고강도 ; 재령 ; 성숙도 curing temperature ; hydration ; high-strength concrete ; aging ; maturity method |
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Abstract |
The maturity method is used to estimate the effects of time and temperature on the strength development of concrete. The purpose of this paper is to show how variable curing temperatures affect strength development for both normal and high-strength concrete using the maturity concept. The experimental results for normal-strength concrete show clearly the cross-over effect of strength development as the time of the peak temperature varied. However, this cross-over effect does not exist after the actual ages are converted to the temperature dependent equivalent age. In other words, the existing maturity method does not include the effect of varying the time to peak temperatures but instead includes the effect of the magnitude of peak temperatures. For high-strength concrete, the results were inconclusive. This fact for normal-strength concrete coincides with the ASTM stated limitation that the existing maturity method doesn't take into account the effect of early age temperature on long-term ultimate strength. The results of this 3-year study are used as a basis for an improved concrete maturity function.
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