Preparation of underwater quick-set and expansion polyurethane grouting material and its properties

Authors

YANG Zhu, State Key Laboratory of Safety Technology of Metal Mine, Changsha Institute of Mining Research Co. Ltd., Changsha 410012, China
XUE Ren, National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Normal University, Changsha 410081, China
WANG Jun, State Key Laboratory of Safety Technology of Metal Mine, Changsha Institute of Mining Research Co. Ltd., Changsha 410012, China
LAN Zhili, National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Hunan Normal University, Changsha 410081, China

Abstract

Quick plugging and dynamic grouting technology under complex geologic conditions in mines is a technical problem in the field of grouting and one of the effective solutions is to develop new chemical grouting materials. Based on the reaction principle of polyurethane materials, we carried out the research and development on production formula of polyurethane grouting materials. By analyzing the polyurethane synthesis reaction temperature and the way of adding reagents as well as conducting contrast experiments on various auxiliaries and additives the best formula for the material was determined. It was found that the grouting material prepared by 4% nano silica modification had better performance, and high hydro-expansion rate, and reaction process and products were environmentally friendly and non-toxic by using phosphoric acid as retarder, ethyl acetate as solvent and PM-33 as catalyst. Our work is believed to provide a new type of one-component quick-set and expansion polyurethane grouting material for grouting under complex geologic conditions.

Keywords

polyurethane, grouting material, quick-set and expansion, optimal formula

DOI

10.3969/j.issn.1001-1986.2020.02.021

Recommended Citation

YANG Zhu, XUE Ren, WANG Jun, et al. (2020) "Preparation of underwater quick-set and expansion polyurethane grouting material and its properties," Coal Geology & Exploration: Vol. 48: Iss. 2, Article 22.
DOI: 10.3969/j.issn.1001-1986.2020.02.021
Available at: https://cge.researchcommons.org/journal/vol48/iss2/22

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