Investigations on the Static Behavior of Self-Compacting Concrete Under-Reamed Piles
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 3
Abstract
Self-compacting concrete (SCC), a recent development, eliminates the need for internal or external vibration, as it freely flows in and around dense reinforcement and fills the mold completely without any blockages. SCC would be an ideal material for cast in situ piles, where compaction is infeasible. Six double under-reamed piles having a diameter of and a length of , three made of SCC and three of conventionally vibrated cement concrete having similar strengths, were cast and tested to evaluate their static behavior in axial compression and tension (pullout). Later, all the piles were exhumed using suitable machinery to examine whether the pile shaft and bulbs had been well formed. Ultrasonic pulse velocity measurements were also taken on the exhumed piles along the length to evaluate the integrity of the concrete. Concrete cores of diameter and height taken from the pile shaft were tested for mechanical and durability related properties. The experimental study clearly demonstrated that the SCC in situ piles had better control on geometry when cast against soil form work.
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Acknowledgment
The authors express their sincere thanks to the staff of Concrete Composites Laboratory for their cooperation and assistance in completing the investigations.
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© 2006 ASCE.
History
Received: Aug 31, 2004
Accepted: May 24, 2005
Published online: Jun 1, 2006
Published in print: Jun 2006
Notes
Note. Associate Editor: Christopher K. Y. Leung
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