Influence of Portland Cement Type on Unconfined Compressive Strength and Linear Expansion of Cement-Stabilized Phosphogypsum
Publication: Journal of Environmental Engineering
Volume 129, Issue 10
Abstract
This technical note summarizes the results of a laboratory-testing program aimed at evaluating the engineering properties of cement-stabilized phosphogypsum mixtures for road base and subbase construction. Phosphogypsum is a solid byproduct of the production of phosphoric acid, a major constituent of many fertilizers that has chemical and radioactive properties may cause environmental problems. For every ton of phosphoric acid produced, approximately 5.0 tons of phosphogypsum are generated. This magnifies the problem of dealing with growing phosphogypsum stockpiles. The research program described herein, covered the physical characterization of phosphogypsum, and tests that uncovered the influence of cement type and content, curing time, and compaction energy on its unconfined compressive strength and expansion. The laboratory results indicate that cement-stabilized phosphogypsum mixtures have potential applications as road base and subbase materials.
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Information
Published In
Journal of Environmental Engineering
Volume 129 • Issue 10 • October 2003
Pages: 956 - 960
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Apr 18, 2003
Accepted: Apr 18, 2003
Published online: Sep 15, 2003
Published in print: Oct 2003
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