Mechanisms on the Salt–Frost Scaling of Concrete
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 3
Abstract
In this paper, the effects of NaCl concentration on saturation in concrete and ice-formation pressure and volume expansion of solutions are investigated; also, mechanisms of concrete salt-frost scaling are analyzed. Results show that the ice-formation pressure and volume expansion of solutions are significantly reduced with increased NaCl concentration, which positively affects the reduction of salt-frost scaling of concrete. On the other hand, the capillary-uptake degree of saturation and water-uptake rate in concrete obviously increase with increased NaCl concentration, which negatively affects the reduction of salt-frost scaling. According to the measured data, the ice-formation pressure in concrete is calculated, and the result quantitatively proves that the ice-formation pressure generated by 2–6% NaCl solution causes maximal concrete damage.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 3 • March 2017
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 24, 2015
Accepted: Aug 11, 2015
Published online: Oct 30, 2015
Discussion open until: Mar 30, 2016
Published in print: Mar 1, 2017
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