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Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand

Polymer slurry is widely used in underground engineering treatment, but due to the concealed nature of underground projects, the diffusion pattern of slurry in the sand has been little studied. In this study, the basic physical properties of water-based polyurethane, oil-based polyurethane, and acry...

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Autores principales: Li, Zhenhua, Zhu, Zihao, Zhao, Yahong, Zeng, Cong, Zhang, Peng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459974/
https://www.ncbi.nlm.nih.gov/pubmed/36080709
http://dx.doi.org/10.3390/polym14173635
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author Li, Zhenhua
Zhu, Zihao
Zhao, Yahong
Zeng, Cong
Zhang, Peng
author_facet Li, Zhenhua
Zhu, Zihao
Zhao, Yahong
Zeng, Cong
Zhang, Peng
author_sort Li, Zhenhua
collection PubMed
description Polymer slurry is widely used in underground engineering treatment, but due to the concealed nature of underground projects, the diffusion pattern of slurry in the sand has been little studied. In this study, the basic physical properties of water-based polyurethane, oil-based polyurethane, and acrylate and epoxy resin were compared, and the performance of chemical grouted sands with different polymer slurry/sand mass ratios (PS/S) was tested. The higher the PS/S, the better the mechanical and impermeability properties of the chemical grouted sands. In this paper, water-based polyurethane was selected to carry out orthogonal tests on the diffusivity of slurry in sands. This experiment investigated the degree of influence of sand quality, grouting pressure and sand compactness on the diffusion of slurry in sands. The test results show that, in terms of factors affecting the final pressure of grouting, the sand density has the greatest influence, followed by the sand quality, and the grouting pressure is the smallest. In terms of slurry diffusibility, grouting pressure has the greatest influence, followed by sand compactness, and the sand quality is the smallest. The diffusion mechanism of slurry in the sand was deduced from the morphology of chemical grouted sands. Water-based polyurethane showed splitting-compression-penetration diffusion in sands of different grades, and the diffusion pattern of the slurry was not the same in low-pressure (1–1.5 MPa) grouting and high-pressure (2 MPa) grouting, and lateral splitting occurred in the case of high-pressure grouting diffusion.
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spelling pubmed-94599742022-09-10 Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand Li, Zhenhua Zhu, Zihao Zhao, Yahong Zeng, Cong Zhang, Peng Polymers (Basel) Article Polymer slurry is widely used in underground engineering treatment, but due to the concealed nature of underground projects, the diffusion pattern of slurry in the sand has been little studied. In this study, the basic physical properties of water-based polyurethane, oil-based polyurethane, and acrylate and epoxy resin were compared, and the performance of chemical grouted sands with different polymer slurry/sand mass ratios (PS/S) was tested. The higher the PS/S, the better the mechanical and impermeability properties of the chemical grouted sands. In this paper, water-based polyurethane was selected to carry out orthogonal tests on the diffusivity of slurry in sands. This experiment investigated the degree of influence of sand quality, grouting pressure and sand compactness on the diffusion of slurry in sands. The test results show that, in terms of factors affecting the final pressure of grouting, the sand density has the greatest influence, followed by the sand quality, and the grouting pressure is the smallest. In terms of slurry diffusibility, grouting pressure has the greatest influence, followed by sand compactness, and the sand quality is the smallest. The diffusion mechanism of slurry in the sand was deduced from the morphology of chemical grouted sands. Water-based polyurethane showed splitting-compression-penetration diffusion in sands of different grades, and the diffusion pattern of the slurry was not the same in low-pressure (1–1.5 MPa) grouting and high-pressure (2 MPa) grouting, and lateral splitting occurred in the case of high-pressure grouting diffusion. MDPI 2022-09-02 /pmc/articles/PMC9459974/ /pubmed/36080709 http://dx.doi.org/10.3390/polym14173635 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Zhenhua
Zhu, Zihao
Zhao, Yahong
Zeng, Cong
Zhang, Peng
Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand
title Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand
title_full Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand
title_fullStr Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand
title_full_unstemmed Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand
title_short Experimental Investigation on the Diffusion Law of Polymer Slurry Grouted in Sand
title_sort experimental investigation on the diffusion law of polymer slurry grouted in sand
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9459974/
https://www.ncbi.nlm.nih.gov/pubmed/36080709
http://dx.doi.org/10.3390/polym14173635
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