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http://dx.doi.org/10.5345/JKIC.2007.7.1.071

Estimation of the Compressive Strength of the Concrete incorporating Mineral Admixture based on the Equivalent Age Method  

Han, Min-Cheol (청주대학교 건축공학부)
Han, Cheon-Goo (청주대학교 건축공학부)
Publication Information
Journal of the Korea Institute of Building Construction / v.7, no.1, 2007 , pp. 71-77 More about this Journal
Abstract
This paper is to investigate the effect of the curing temperature on strength development of concrete incorporating cement kiln dust(CKD) and blast furnace slag (BS) quantitatively. Estimation of the compressive strength of the concrete was conducted using the equivalent age equation and the rate constant model proposed by Carino. Correction of Carino model was studied to secure the accuracy of strength development estimation by introducing correction factors regarding rate constant and age. An increasing curing temperature results in an increase in strength at early age, but with the elapse of age, strength development at high curing temperature decreases compared with that at low curing temperature. Especially, the use of BS has a remarkable strength development at early age and even at later age, high strength is maintained due to accelerated pozzolanic activity resulting from high temperature. Whereas, at low curing temperature, the use of BS leads to a decrease in compressive strength. Accordingly, much attention should be paid to prevent strength loss at low temperature. Based on the strength development estimation using equivalent age equation, good agreements between measured strength and calculated strength are obtained.
Keywords
mineral admixture; cement kiln dust; equivalent age; strength development; curing temperature;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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