Influence of Combined Hauling Time and Temperature on Flow Properties of Self-Consolidating Concrete: Retempering Remediation
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 1
Abstract
This investigation studied the retempering technique of remediation to mitigate the influence of combined transportation time and extreme hot and cold temperatures on plastic self-consolidating concrete (SCC). This method of remediation consisted of adjusting admixture dosage at the end of hauling to produce a matrix with similar fresh properties as those of the control concrete prepared at the temperature of 21°C and transportation duration of 10 minutes. Seven different temperatures (43, 36, 28, 21, 14, 7, and ) and five different hauling times (10, 20, 40, 60, and 80 minutes) were adopted. Polycarboxylate-based high-range water-reducing admixture (HRWRA) and viscosity-modifying admixture (VMA) were used to produce the selected matrices with slump flow of or , visual stability index (VSI) of 0 (highly stable concrete) and of 2 to 5 s. Laboratory test results revealed that the retempering method of remediation was successful in mitigating the adverse effect of combined hauling time and temperature on the flow characteristics of self-consolidating concrete.
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Acknowledgments
The authors would like to acknowledge the financial support of the Nevada Department of Transportation, Grant No. UNSPECIFIEDP 077-06-803. Thanks also are given to a number of admixture manufacturers and concrete suppliers who contributed materials and equipment used in this investigation. Their names are withheld to avoid any concern of commercialization or private interest.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 1 • January 2012
Pages: 1 - 7
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Dec 11, 2009
Accepted: Jul 11, 2011
Published online: Dec 15, 2011
Published in print: Jan 1, 2012
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