ORIGINAL RESEARCH article
Front. Earth Sci.
Sec. Earth and Planetary Materials
Volume 13 - 2025 | doi: 10.3389/feart.2025.1604681
This article is part of the Research TopicAdvances in Structure, Characterization, and Failure Mechanisms of Geomaterials: Theoretical, Experimental, and Numerical ApproachesView all 10 articles
Experimental Investigation on the Resistivity and Mechanical Properties of High-Resistance Cement-Based Grouting Materials for Mining
Provisionally accepted
- 1CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an, China
- 2North China Institute of Science and Technology, Langfang, China
- 3Jilin University, Changchun, Hebei Province, China
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The electrical characteristics of cement-based grouting materials are the foundation for implementing geophysical electrical exploration in coal mine grouting engineering.However, the preparation methods for high-resistivity grouting materials, which act as "contrast agents" in geophysical surveys, remain unclear due to the multiple influencing factors of resistivity. To address this, resistivity experiments were conducted using a self-developed apparatus to investigate the effects of curing age, admixture type, and dosage on the resistivity characteristics of grouting materials. This led to identifying optimal mix proportions for conventional cement-based high-resistivity grouting materials. Concurrently, mechanical strength tests were performed to analyze the impact of admixture dosage and curing age on compressive strength. The results indicate that the resistivity enhancement effects of four common cement additives can be ranked as follows: pyrophyllite powder > polyvinyl alcohol > air-entraining agent > fly ash. Considering both resistivity increase and mechanical strength, talc powder and polyvinyl alcohol emerge as viable candidates for use as additives in cement-based high-resistivity grouting materials. Specifically, with a talc powder dosage of 15%, the electrical resistivity of the grouted body after 28 days reached 4966.7 Ω•m, which is 119.1 times that of the control group (41.7 Ω•m). Similarly, with a polyvinyl alcohol dosage of 1%, the resistivity reached 7070.6 Ω•m, which is 169.6 times that of the control group. These findings provide critical insights for developing high-resistivity grouting materials with dual functionality as geophysical contrast agents and structural reinforcements.Keywords：coal mine grouting, cement-based materials, admixtures, high-resistivity ratio formulation, compressive strength.
Keywords: coal mine grouting, cement-based materials, Admixtures, high-resistivity ratio formulation, Compressive Strength
Received: 02 Apr 2025; Accepted: 05 May 2025.
Copyright: © 2025 Xu, Qi, Dong, Dai, Yin, Ma and Zhong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Bin Xu, CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an, China
Shuning Dong, CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an, China
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