Effects of Silica Fume and Rice Husk Ash on the Properties of Heavy Weight Concrete
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 3
Abstract
Considerable efforts are being taken worldwide to utilize local natural waste and by-product materials in making concrete, such as silica fume (SF) or rice husk ash (RHA) as supplementary cementing materials to improve concrete properties (durability, strength, etc.). The effect of using SF or RHA as a partial replacement for cement has been investigated. Ilmenite and baryte were used as heavy aggregates while gravel was used as a reference normal aggregate. Physical, mechanical, and shielding properties of different types of heavy weight concrete were studied. The durability of the studied concrete was investigated. The study was extended to investigate the microstructure, the infrared and thermal analysis, and the effect of absorbed gamma radiation of the studied concrete types. Results showed that ilmenite concrete mixed with 15% SF had the highest density; compressive, tensile, flexural, and bond strengths; modulus of elasticity; and attenuation coefficient values. Concrete mixed with RHA had good resistance to sulfate attack, while concrete mixed with SF had better resistance to sulfate attack. There was no significant effect for either SF or RHA on the concrete gamma attenuation coefficient. Results showed that concrete mixed with RHA had higher mechanical and physical properties than that mixed without any additives but lower properties than that mixed with SF.
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Acknowledgment
The author acknowledges Eng. R. A. M. El-Sadani, Nuclear Research Center, Atomic Energy Authority, for her help and assistance in the experimental part of this paper.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 3 • June 2006
Pages: 367 - 376
Copyright
© 2006 ASCE.
History
Received: Apr 15, 2003
Accepted: Jun 29, 2004
Published online: Jun 1, 2006
Published in print: Jun 2006
Notes
Note. Associate Editor: Jason Weiss
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