Distribution Deviation of Large Aggregates from Uniformity in Waste Containment Concrete. II: Experimental Results and Quality Assurance
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Volume 18, Issue 1
Abstract
A quality control methodology was implemented for aggregate distribution in concrete that can be used in waste containment using the analytical method developed in Part I of this paper. This involves the comparison of three concrete placement methods: rodding, vibration, and placement with neither rodding nor vibration. The concrete mix consists of coarse (#4 stone and #67 stone) aggregate and fine aggregate, the latter of which is sand (making up 29.4% by weight). The experimental results have been used herein to develop quality control charts based on the deviation index, the range of the deviation index within each cylinder, and nonconformity of the aggregate to even distribution, respectively. The nonconformity quality control chart is found to be the most appropriate scheme for evaluating aggregate distribution deviation. The results obtained from the nonconformity quality control chart show that the upper control limit, when specified at three times the square root of the mean deviation index, has a value of 23.4. This is a relatively large value and the deviation indices per slice all fall below it, indicating that the quality of the concrete mix is satisfactory.
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Acknowledgments
This research project was sponsored by Duke Energy Corporation at the Global Institute for Energy and Environmental Systems (GIEES) of the University of North Carolina at Charlotte. Special thanks go to Concrete Supply for providing the materials used in this research and to Mactec Engineering and Consulting of Georgia (formerly Law Engineering) for allowing the use of their concrete laboratory.
References
Besterfield, D. H. (1990). Quality control. Prentice-Hall, Englewood Cliffs, N.J.
Federal Highway Administration. (1990). “Highway materials engineering: Module VI. Concrete.” Publication No. FHWA-HI-90-009, U.S. Dept. of Transportation, Washington, D.C.
Inyang, H. I., and Hourani, M. S. (2006). “Distribution deviation of large aggregates from uniformity in waste containment concrete I: Quantitative model formulation.” J. Mater. Civ. Eng., 18(1), 61–72.
National Ready Mixed Concrete Association. (1985). “Section 1: Ready mixed concrete quality control guide.” Quality control manual, Silver Spring, Md.
National Ready Mixed Concrete Association. (1990). Concrete plant standards, Silver Spring, Md.
Portland Cement Association. (1998). Design and control of concrete mixtures, Skokie, Ill.
Tikalsky, P. J., Mather, B., and Olek, J. (2000). “Concrete durability.” A2E01: Committee on Durability of Concrete, ⟨http://www.nationalacademies.org/trb/publications/millenium/00020.pdf⟩ (April 9, 2002).
Troy, J. F. (1982). Concrete materials technology, Institute of Civil Engineers (ICE) Works Construction Guides, Thomas Telford Limited, London.
Truck Mixer Manufacturers’ Bureau. (1989). Truck mixer and agitation standards, Silver Spring, Md.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 1 • February 2006
Pages: 73 - 80
Copyright
© 2006 ASCE.
History
Received: Nov 25, 2003
Accepted: Nov 9, 2004
Published online: Feb 1, 2006
Published in print: Feb 2006
Notes
Note. Associate Editor: Zhishen Wu
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