Impacts of Coarse-Aggregate Gradation on the Workability of Slip-Formed Concrete
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 2
Abstract
Choosing an aggregate gradation is an important step in the design of concrete mixtures. This work presents a systematic laboratory study to find practical limits for the workability and finishability of these mixtures for slip-formed concrete applications. It investigates the upper and lower gradation limits for coarse aggregates, gradations that have no material on single and adjacent sieves, idealized aggregate gradations from previous publications, and insights into sieves responsible for cohesion and finishability of concrete mixtures for slip-formed applications. The work shows that a wide range of successful aggregate gradations can be used to produce concrete mixtures with satisfactory performance; however, certain gradation characteristics can lead to poor performance. These guidelines can be used to assist producers in making concrete mixtures with improved economy, durability, and sustainability.
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Acknowledgments
The authors would like to express their appreciation to the Oklahoma Department of Transportation and the Oklahoma Transportation Center for providing funding, and to Kenny Seward, Ralph Browne, Gary Fick, and Bruce Russell for giving valuable comments to the project.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 2 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 2, 2017
Accepted: Jul 7, 2017
Published online: Nov 17, 2017
Published in print: Feb 1, 2018
Discussion open until: Apr 17, 2018
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