Efficient Utilization of Recycled Concrete Aggregate in Structural Concrete
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 3
Abstract
In Singapore, the applications of recycled concrete aggregate (RCA) are limited to nonstructural concrete, road construction, and backfilling. To realize the beneficial use of RCA, an in-depth study was conducted to evaluate its use in structural concrete. This paper reports the test results of a study that is part of extensive research intended to evaluate the properties of RCA concrete produced by a proposed rational approach in concrete mix design. The key parameters studied include compressive strength, elastic modulus, and drying shrinkage. The results showed that the RCA concrete can be designed to achieve comparable compressive strength and elastic modulus, relative to the corresponding properties of concrete containing natural coarse aggregate (NCA). RCA concrete tends to exhibit higher drying shrinkage strains relative to NCA concrete, but the values are within the recommended limits.
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Acknowledgments
The authors gratefully acknowledge the Ministry of National Development and BCA of Singapore for their partial funding and full support of the research project. The following individuals formed the research team for the study and are appreciated for their advice, suggestions, and contributions to the research project: Mr. Koh Hoon Lye from Samwoh and Er. Punithan Shanmugam from BCA.
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Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 3 • March 2013
Pages: 318 - 327
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 30, 2011
Accepted: May 23, 2012
Published online: Feb 15, 2013
Published in print: Mar 1, 2013
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