Usability of Raw Rice Husk Instead of Polypropylene Fibers in High-Strength Concrete under High Temperature
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 1
Abstract
In this study, the usability of raw rice husk (RRH) instead of polypropylene fibers (PP) in high-strength concrete was investigated to prevent spalling, improve mechanical, physical, and thermophysical properties of concrete after high temperature treatment. Carbon dioxide () and carbon monoxide (CO) emissions of concrete mixes were also measured at different temperatures. The test results show that when RRH is used at 3% of cement by weight it can prevent explosive spalling and can be a suitable alternative to PP. Due to the lower thermal conductivity of RRH, the RRH mixes had lower thermal conductivity values at all temperatures compared with the PP mixes. The addition of RRH slightly decreased the mechanical properties of the concrete and modified its thermophysical properties by decreasing thermal conductivity and the vapor diffusion resistance factor. Up to 300°C, the CO and emissions of the RRH mixes were similar or in some cases lower than those of the PP mixes. At 600°C, the and CO emissions of the RRH mixes were higher than those of the PP mixes.
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Acknowledgments
This research was carried out in the Faculty of Civil Engineering at Yildiz Technical University. The authors would like to thank Nuh Beton for supplying the cement and aggregates, Elkem for supplying silica fume, and Sika for supplying superplasticizer.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 20, 2014
Accepted: Mar 23, 2015
Published online: May 20, 2015
Discussion open until: Oct 20, 2015
Published in print: Jan 1, 2016
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