Evaluation of Properties of Concrete Incorporating Fly Ash or Slag Using a Hydration Model
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 7
Abstract
Granulated slag from metal industries and fly ash from the combustion of coal are industrial by-products that have been used widely as mineral admixtures in normal and high-strength concrete. Because of the reaction between calcium hydroxide and fly ash or slag, the hydration of concrete containing fly ash or slag is much more complex than that of portland cement. In this paper, the production of calcium hydroxide in cement hydration and its consumption in the reaction of mineral admixtures is considered to develop a numerical model that simulates the hydration of concrete containing fly ash or slag. The properties of concrete incorporating fly ash or slag, such as the adiabatic temperature increase, chemically bound water, reaction degree of mineral admixture, and the compressive strength, are determined by the contribution of both cement hydration and the reaction of the mineral admixtures. The proposed model is verified with experimental data from concrete with different water to cement ratios and mineral admixture substitution ratios.
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Acknowledgments
This study was supported by the Engineering Research Center designated by the Ministry of Education and Science Technology, the Sustainable Building Research Center, Hanyang University (UNSPECIFIEDR11-2005-056-04003). This research was supported by a grant (UNSPECIFIED06-CIT-A02: “Standardization Research for Construction Materials”) from the Construction Infrastructure Technology Program funded by the Ministry of Land, Transport, and Marine Affairs. This research was supported by a project (UNSPECIFIED2010-0014051: “Study on the Carbonation Prediction of Concrete Using Portland Blast Furnace Slag Hydration Model”) from the National Research Foundation of Korea.
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Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 7 • July 2011
Pages: 1113 - 1123
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 28, 2010
Accepted: Dec 17, 2010
Published online: Dec 20, 2010
Published in print: Jul 1, 2011
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