Environmental Effects on Durability of Aggregates Stabilized with Cementitious Materials
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 1
Abstract
The present study focuses on investigating the effect of freeze–thaw (FT) cycles, referred to as environmental effect in this paper, on aggregates stabilized with various stabilizing agents, namely, cement kiln dust (CKD), Class C fly ash (CFA), and fluidized bed ash (FBA). Cylindrical specimens were compacted and cured for in a moist room with a constant temperature and controlled humidity. After curing, specimens were subjected to 0, 8, 16, and 30 FT cycles, and then tested for resilient modulus . Results showed that values of stabilized specimens decreased with increasing FT cycles up to 30. The reasons for such changes are explained by the increase in moisture content during thawing and the formation of ice lenses within the pores during freezing, causing distortion of the matrix of particles. It was also found that the decrease in values varied with the type of stabilizing agents. The CKD-stabilized Meridian and Richard Spur aggregates exhibited a higher reduction in values than the corresponding values of CFA- and FBA-stabilized specimens. The CFA-stabilized Sawyer specimens performed better than their CKD- and FBA-stabilized counterparts.
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Acknowledgments
The financial support by the Oklahoma Department of Transportation, in cooperation with the Federal Highway Administration, is highly appreciated and acknowledged. The writers are thankful to Dr. Joakim Laguros for his comments and suggestions, which helped improve the quality of this research.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 1 • January 2007
Pages: 41 - 48
Copyright
© 2007 ASCE.
History
Received: Feb 11, 2005
Accepted: Jul 29, 2005
Published online: Jan 1, 2007
Published in print: Jan 2007
Notes
Note. Associate Editor: Hilary I. Inyang
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