Effect of Cold Temperature on the Chloride-Binding Capacity of Cement
Publication: Journal of Cold Regions Engineering
Volume 25, Issue 4
Abstract
Service life of reinforced concrete structures exposed to chloride ions is closely related to the rate of chloride ion diffusion through the concrete. The determination of the apparent chloride diffusion coefficient of concrete takes into account the chloride-binding capacity but not the effect of temperature on the chloride-binding capacity. This paper examines the effect of temperature ranging from 22°C to –3°C on the chloride-binding capacity for cement paste containing varying percentages of ground granulated blast furnace slag (GGBFS) as cement replacement. This study adopts the Freundlich isotherm form of the chloride-binding isotherm as a function of temperature. Both the experimental and modeled results indicate a nonlinear relationship between the exposure temperature and the chloride-binding capacity for cement paste containing 0–60% GGBFS as cement replacement. The order of chloride-binding capacity as a function of exposure temperature is as follows: . The order of chloride-binding capacity as a function of the percentage of GGBFS as cement replacement is as follows: . Service life estimates of reinforced concrete structures in cold climates that are exposed to deicer salts are not conservative if based on chloride-binding capacity evaluated at 22°C.
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Acknowledgments
The writers would like to acknowledge the financial support from the Natural Science and Engineering Research Council of Canada (NSERC)NSERC, Materials Manufacturing Ontario and McMaster University’s Centre for Effective Design of Structures funded through the Ontario Research and Development Challenge Fund.
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Information & Authors
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Published In
Journal of Cold Regions Engineering
Volume 25 • Issue 4 • December 2011
Pages: 133 - 144
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 16, 2010
Accepted: Jun 22, 2011
Published online: Jun 24, 2011
Published in print: Dec 1, 2011
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