Exploration of Mechanisms of Joint Deterioration in Concrete Pavements regarding Interfacial Transition Zone
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2018-11-27
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Hindawi
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Wang, Kejin
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Civil, Construction and Environmental Engineering
Abstract
As a common issue for cold weather regions, premature deterioration of concrete at joints has been reported in many states. In this paper, the mechanisms of joint deterioration were investigated, and then, experimental investigations were conducted to further verify some of the mechanisms. It was found that freeze-thaw (F-T) damage and salt crystallization are not enough to cause the observed deterioration, but the deterioration near the interfacial transition zone (ITZ) may be the cause of some of the observed phenomena. In the experimental work, samples were tested at 40°F in salt solutions to observe the deterioration in the ITZ using the scanning electron microscope (SEM). Concrete tested in MgCl2 solution indicated distress in ITZ under SEM. It was found that ITZ may act as a shortcut for ion transfer to surrounding concrete near the joints and may also be the weak point for cracking due to expansion of the paste.
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This article is published as Wang, Xin, Jiake Zhang, Xuhao Wang, Peter Taylor, Kejin Wang, and Xinjian Sun. "Exploration of mechanisms of joint deterioration in concrete pavements regarding interfacial transition zone." Advances in Civil Engineering 2018 (2018): 3295954. DOI: 10.1155/2018/3295954. Copyright 2018 Xin Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Posted with permission.