Comparison of Rapid Tests for Evaluation of Chloride Resistance of Concretes with Supplementary Cementitious Materials
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 9
Abstract
In this research, the performance of three rapid methods for evaluation of chloride resistance of concrete, including the rapid chloride penetration test (RCPT), rapid chloride migration test (RCMT), and electrical resistance test, are compared. Because the ability of the RCPT method to evaluate of concrete mixes containing supplementary cementitious materials has been questioned by some researchers, the mixes studied included the control mix and mixes containing 2.5, 5, 7.5, and 10% silica fume (SF); 7.5 and 15% fine fly ash (VFA); 15 and 30% fly ash (FA); 15 and 30% pumice (PU); and 15, 30, and 50% slag (SL). The results of all three methods show a considerable decrease in chloride permeability of mixes containing silica fume at the ages of 28 and 90 days and mixes containing other supplementary cementitious materials at 90 days. However, the RCPT test considerably overestimated the improvement compared to the other two methods, mainly as a result of the temperature rise effect in this test. Despite the simplicity and speed of the electrical resistance test, its results correlate well with those of the RCMT test.
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Acknowledgments
The support of the ports and shipping organization of Iran for the reported research is acknowledged.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 9 • September 2012
Pages: 1175 - 1182
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 3, 2011
Accepted: Jan 23, 2012
Published online: Jan 25, 2012
Published in print: Sep 1, 2012
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