Numerical and Experimental Studies of Diffusion Law of Grouting with Expansible Polymer
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 2
Abstract
Polyurethane has been widely used as new chemical grouting material. Expansion characteristics caused by chemical reactions make polymer grout different from other types of grout. To throw light on the diffusion process of polymer grout in a fracture, a density model was derived by fitting the experimental data based on the polymerization mechanism of polyurethane. In addition, a numerical simulation of polymer diffusion in a single fracture was developed to predict the pressure distribution. An experiment was carried out to analyze the diffusion distance and pressure field under different grouting masses. Comparison of results from numerical calculation and experiments indicates that the numerical approach is able to predict polymer diffusion in the fracture. The numerical simulation is suitable for rapid determination of the grouting mass, diffusion shape, flow-front position, and pressure distribution, which could provide guidance on assessing polymer grouting parameters.
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Acknowledgments
This research was supported by National Key Research and Development Plan (Grant No. 2016YFC0802207), the National Natural Science Foundation of China (Grant Nos. U1404525 and 51378473), Key Research Projects of Higher Education in Henan Province (18A580001), and the Program for Innovative Research Team (in Science and Technology) at the University of Henan Province (No. 14IRTSTHN027).
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 2 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Nov 22, 2016
Accepted: Jul 7, 2017
Published online: Dec 12, 2017
Published in print: Feb 1, 2018
Discussion open until: May 12, 2018
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