Utilizing Waste Recycled Glass as Sand/Cement Replacement in Concrete
Publication: Journal of Materials in Civil Engineering
Volume 21, Issue 12
Abstract
The potential use of waste recycled glass in concrete as recycled glass sand (RGS) and pozzolanic glass powder (PGP) was examined in this study. No major difference was found in compressive strength of concrete with the presence of RGS as sand replacement. While, the compressive strength of concrete reduced by 16 and 10.6% at 28 and 364 days respectively when 20% of Portland cement was replaced by PGP. The potential expansion of concrete due to alkali-silica reaction (ASR) was monitored according to the procedure of British Standard BS 812 Part 123:1999. As a siliceous material, the use of RGS as sand replacement in concrete possesses high risk of ASR expansion. Therefore, cracks were observed when RGS was used as sand replacement in concrete without any precautions to minimize this risk. Different materials were used as ASR suppressors to mitigate the potential risk of ASR, such as: ground granulated blastfurnace slag, metakaolin, PGP, and lithium nitrate . The expansion associated with ASR was significantly reduced when the ASR suppressor was used in concrete.
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Acknowledgments
The writers would like to thank the faculty of the built environment of the University of the West of England, Bristol for financing the research work. Special thanks to Mr. Rick Drew the concrete laboratory technician for his valuable assistance.
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© 2009 ASCE.
History
Received: Oct 26, 2006
Accepted: Apr 21, 2009
Published online: Nov 13, 2009
Published in print: Dec 2009
Notes
Note. Associate Editor: Hilary I. Inyang
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