Simple Procedure for Determining Long-Term Chemical Shrinkage for Cementitious Systems Using Improved Standard Chemical Shrinkage Test
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 8
Abstract
In the past 10 years, renewed research interest has shown the benefits of internal curing by incorporating prewetted lightweight fine aggregate (LWFA) in high-performance concrete (HPC). To determine the optimum LWFA content, information about the propensity for shrinkage in the cement paste, specifically the chemical shrinkage value, is needed. However, information is lacking on how to determine the long-term chemical shrinkage value for HPC with supplementary cementitious materials (SCMs) and/or shrinkage-reducing admixture (SRA). The purpose of this research was to identify a simple procedure to determine long-term chemical shrinkage values for given cementitious systems with SCMs and/or SRA. Several improvement to ASTM C1608 (dilatometry procedure) were investigated. An experimental prediction model was adopted and verified to estimate long-term chemical shrinkage values for portland cement systems containing SCMs and/or SRA. A recommended procedure is proposed to determine the long-term chemical shrinkage values for HPC systems containing SCMs and/or SRA, and a modification to a commonly used LWFA proportioning equation is suggested.
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Acknowledgments
The authors would like to thank the Oregon Department of Transportation for financial support for this research effort.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 8 • August 2012
Pages: 989 - 995
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Aug 7, 2011
Accepted: Jan 24, 2012
Published online: Jan 26, 2012
Published in print: Aug 1, 2012
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