Experimental Study of Polyurethane Grout Diffusion in a Water-Bearing Fracture
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 3
Abstract
Polyurethane grouting can be used for antiseepage and reinforcement in underground construction. Understanding the diffusion characteristics of polyurethane grout is critical for good grouting design. However, the influence of water pressure on the diffusion of polyurethane grout is not clear. The aim of this work is to experimentally investigate the diffusion behavior of polyurethane grout in a water-bearing fracture. A series of laboratory experiments was conducted using a self-designed visual fracture grouting device under different conditions. The influences of grouting quantity and water pressure on grout diffusion distance and flow field are discussed. The results show that grout expansive diffusion and the pressure field change of the grout–water system have a phased characteristic. Also, the change of grout pressure is not synchronized with grout diffusion distance. The grout diffusion radius increases with the increase of grouting quantity, but decreases with the increase of hydrostatic pressure. The study helped gain insight into the performance of polyurethane grouting in fracture under static water condition.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors sincerely appreciate anonymous reviews and the Editor for their time and critical comments on this paper. This research was supported by the National Key Research and Development Plan (Grant Nos. 2016YFC0802207, and 2018YFB1600200), the Program for Science and Technology Innovation Talents in Universities of Henan Province (Grant No. 19HASTIT041), the National Natural Science Foundation of China (Grant Nos. 51908514, 51878624, and 51878622), Key Research Projects of Higher Education in Henan Province (Grant No. 18A580001), the Natural Science Foundation of Henan Province (Grant No. 182300410116), the Program for Innovative Research Team (in Science and Technology) at the University of Henan Province (Grant No. 18IRTSTHN007), the Major Scientific and Technological Special Project in Henan (Grant No. 181100310400), and the Postdoctoral Research Sponsorship in Henan Province (Grant No. 19030026).
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 3 • March 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Sep 18, 2019
Accepted: Aug 7, 2020
Published online: Dec 21, 2020
Published in print: Mar 1, 2021
Discussion open until: May 21, 2021
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