Examining Freeze/Thaw Cycling and Its Impact on the Hydraulic Performance of Cement-Treated Silty Sand
Publication: Journal of Cold Regions Engineering
Volume 29, Issue 3
Abstract
Cement-based solidification/stabilization () is a remediation technology that has been widely used for treatment of a range of contaminants. Currently, there is limited published data on changes in hydraulic performance of cement-treated materials subjected to cycles of freezing/thawing (). Fourteen sets of tests were performed to examine the influence of factors such as number of cycles, freezing temperature, curing time, and mix design on changes in hydraulic conductivity and unconfined compressive strength (UCS) of cement-treated silty sand. Results showed an increase of up to three orders of magnitude in hydraulic conductivity as well as decreases in UCS values after exposure to 4 and cycles. Analysis of variance (ANOVA) performed on the results of a factorial experiment considering the effect of freezing temperature, curing time, and number of cycles showed that all of these factors are significant in affecting the measured changes in the hydraulic conductivity and UCS values. Monitoring of damage using the impact resonance method showed that changes in the resonant frequency of specimens were consistent with changes in hydraulic conductivity and UCS after exposure and also allowed monitoring of damage for intermediate cycles with minimal effort.
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Acknowledgments
The authors acknowledge funding provided by the NSERC Discovery and CREATE programs. Funding was also provided through the Canadian Foundation for Innovation.
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Published In
Journal of Cold Regions Engineering
Volume 29 • Issue 3 • September 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 17, 2012
Accepted: Aug 13, 2014
Published online: Oct 7, 2014
Discussion open until: Mar 7, 2015
Published in print: Sep 1, 2015
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