Laboratory Tests on Compaction and Crushing Behaviors of Construction Waste Slag–Clay Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 11
Abstract
Construction waste slag–clay mixture has been widely used as filling material, which has significant social, economic, and environmental protection benefits. However, the slag–clay mixture undergoes significant particle breakage when compacted in practical engineering, which affects the compaction property of the mixture. To determine the compaction property of slag–clay mixture, a series of compaction tests was conducted to investigate the influences of slag content and initial gradation on its compaction behavior. The factors affecting particle crushing were investigated. The results showed that the optimum water content of the slag–clay mixture decreases, whereas the maximum dry density increases first and then decreases, as the slag content increases. The optimum slag content of slag–clay mixtures is 30% despite different initial gradations. The results also showed that the breakage degree of slag particles increases with slag content. Breakage is greater in slag with uniform gradation and slag with large particles. The compaction and the crushing behavior of slag–clay mixture can be well explained by the structural model of a binary mixture.
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Acknowledgments
This work presented in this paper was supported by the National Natural Science Foundation of China (Grants Nos. 51822809 and 41772283) and the Fundamental Research Funds for the Central Universities.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 27, 2018
Accepted: May 29, 2019
Published online: Aug 21, 2019
Published in print: Nov 1, 2019
Discussion open until: Jan 21, 2020
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