Water-Pressure Synergy Mechanisms of Pressure-Driven Geopolymer Granulation of Solid Waste
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 5
Abstract
Using solid waste to produce artificial aggregate (AA) to replace natural aggregate has attracted extensive research interest. This study proposes pressure granulation under minor water to produce AA. The strength formation and water-pressure synergy mechanisms are discussed by setting water and load configurations and characterizing the internal pore structure. In addition, the water damage to the AA is discussed. The results show that the squeeze-out effect caused by the synergistic effect of water and load determines AA’s physical and mechanical properties. Furthermore, the law of the squeeze-out effect is proven by the fact that the AA with a compressive strength of 19.77 MPa was obtained under a 10% water-to-powder ratio and a 55 kN load. In addition, water erosion severely affects AA’s strength, which might be relieved by decreasing the water absorption of AA.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This study was funded by the National Natural Science Foundation of China joint fund for regional innovation and development (Grant No. U20A20315).
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Journal of Materials in Civil Engineering
Volume 35 • Issue 5 • May 2023
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© 2023 American Society of Civil Engineers.
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Received: Apr 13, 2022
Accepted: Sep 8, 2022
Published online: Feb 28, 2023
Published in print: May 1, 2023
Discussion open until: Jul 28, 2023
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