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http://dx.doi.org/10.5345/JKIBC.2014.14.3.273

Modeling of temperature history in the hardening of ultra-high-performance concrete  

Wang, Xiao-Yong (Department of Architectural Engineering, College of Engineering, Kangwon National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.14, no.3, 2014 , pp. 273-284 More about this Journal
Abstract
Ultra-high-performance concrete (UHPC) consists of cement, silica fume (SF), sand, fibers, water and superplasticizer. Typical water/binder ratios are 0.15 to 0.20 with 20 to 30% silica fume. In the production of ultra-high performance concrete, a significant temperature rise at an early age can be observed because of the higher cement content per unit mass of concrete. In this paper, by considering the production of calcium hydroxide in cement hydration and its consumption in the pozzolanic reaction, a numerical model is proposed to simulate the hydration of ultra-high performance concrete. The heat evolution rate of UHPC is determined from the contributions of cement hydration and the pozzolanic reaction. Furthermore, by combining a blended-cement hydration model with the finite-element method, the temperature history in the hardening of UHPC is evaluated using the degree of hydration of the cement and the silica fume. The predicted temperature-history curves were compared with experimental data, and a good correlation was found.
Keywords
ultra-high performance concrete; hydration heat; early-age temperature history; hydration model; finite-element method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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