Field Testing Sections with Stabilized Blended Calcium Sulfate as Base Courses
Publication: Journal of Materials in Civil Engineering
Volume 19, Issue 4
Abstract
Blended calcium sulfate (BCS), an industrial by-product from hydrofluoric acid, was successfully stabilized with 120 grade, ground, granulated blast furnace slag (GGBFS) in a laboratory. A full-scale field testing section was then built to evaluate the in situ performance of the stabilization schemes determined in the laboratory and the impact of coarse aggregates (retained on the No. 4 sieve) on stabilization efficiency. An elaborate laboratory and in situ testing program was performed to provide construction quality control and to characterize the mechanical properties of stabilized BCS. The GGBFS-stabilized BCS performed well in terms of strength, stiffness, and water resistance, but fly ash was not effective in stabilizing BCS. The viability of field mixing techniques and field curing conditions was confirmed by the testing results, which provided some experimental basis for BCS stabilization in the future.
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Acknowledgments
The writers would like to acknowledge the financial support provided by the Louisiana Department of Transportation and Development and Louisiana Transportation Research Center (LTRC) under State Project No. 736-99-1213 and LTRC Research Project No. 03-8GT. The writers would like to extend their appreciation for the help in resilient modulus tests from Dr. Louay Mohammad and Dr. Ananda Herath of LTRC’s EMCRF. The authors also want to thank the following colleagues for their assistance during the material sampling and testing: Gavin Gautreau, Bill King, Melba Bounds, Paul Brady, William Tierney, and Aaron Austin. The help from the pavement section personnel is also greatly appreciated.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 19 • Issue 4 • April 2007
Pages: 329 - 339
Copyright
© 2007 ASCE.
History
Received: Mar 23, 2005
Accepted: Aug 1, 2005
Published online: Apr 1, 2007
Published in print: Apr 2007
Notes
Note. Associate Editor: Manoochehr Zoghi
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