{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T11:27:51Z","timestamp":1768735671307,"version":"3.49.0"},"reference-count":38,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2020,7,8]],"date-time":"2020-07-08T00:00:00Z","timestamp":1594166400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Natural Sciences Foundation of China","award":["51774323"],"award-info":[{"award-number":["51774323"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Minerals"],"abstract":"<jats:p>This research combines a centrifugal test and nuclear magnetic resonance (NMR) technology to study the water retention capacity of the cemented paste backfill. Backfill samples with cement\u2013tailings ratios of 1:4, 1:8, and 1:12, and solid concentrations of 71%, 74%, 77%, 80%, and 83% respectively, were prepared for the test. The relative centrifugal force (    RCF    ) required for accurate testing and the T2 cutoff value that characterizes the water retention capacity were obtained through an NMR test on the backfill samples after centrifugation in saturated conditions. Based on the soil\u2013water characteristic curve (SWCC), the NMR pore water characteristic distribution model was established, and the pore size distribution and effective water retention characteristics were analyzed. This study shows that when the rotating speed is between 1500 and 4000 rpm, the     R C F     of the backfill ranges from 125.8 to 894.4 g\/min   ,    and the T2 cutoff value will vary from 3 to 10 ms. With an increase in solid concentration of the backfill, both the     RCF     and T2 cutoff value decline. The Scanning Electron Microscope (SEM) analysis confirms that an increase in the solid concentration and cement\u2013tailings ratio will lead to obvious bimodal characteristics of the pore size distribution curve of the backfill. In addition, the porosity will decrease, the critical pore value, which represents a value to distinguish pores with different movable fluid retention capabilities and characterizes the pore size classification, will become smaller, and the pore size distribution will become more diverse. These changes indicate that a high-concentration backfill can effectively reduce the flow of a fine-grained matrix with large pores.<\/jats:p>","DOI":"10.3390\/min10070610","type":"journal-article","created":{"date-parts":[[2020,7,8]],"date-time":"2020-07-08T11:47:46Z","timestamp":1594208866000},"page":"610","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Correlation between the Pore Structure and Water Retention of Cemented Paste Backfill Using Centrifugal and Nuclear Magnetic Resonance Methods"],"prefix":"10.3390","volume":"10","author":[{"given":"Rugao","family":"Gao","sequence":"first","affiliation":[{"name":"School of Resources and Safety Engineering, Central South University, Changsha 410083, China"},{"name":"Department of Mining and Materials Engineering, McGill University, 3450 Rue University Montreal, Montreal, QC H3A 2A7, Canada"},{"name":"Research Center for Mining Engineering and Technology in Cold Regions, Central South University, Changsha 410083, China"}]},{"given":"Keping","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Resources and Safety Engineering, Central South University, Changsha 410083, China"},{"name":"Research Center for Mining Engineering and Technology in Cold Regions, Central South University, Changsha 410083, China"}]},{"given":"Wei","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Resources and Safety Engineering, Central South University, Changsha 410083, China"},{"name":"Research Center for Mining Engineering and Technology in Cold Regions, Central South University, Changsha 410083, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9814-834X","authenticated-orcid":false,"given":"Qifan","family":"Ren","sequence":"additional","affiliation":[{"name":"Civil Engineering Research and Innovation for Sustainability, Department of Civil Engineering, Architecture and Georesources, Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"876","DOI":"10.1016\/j.engstruct.2019.03.061","article-title":"Bearing mechanism and stability monitoring of cemented gangue-fly ash backfill column with stirrups in partial backfill engineering","volume":"188","author":"Du","year":"2019","journal-title":"Eng. Struct."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Wang, D.L., Zhang, Q.L., Chen, Q.S., Qi, C.C., Feng, Y., and Xiao, C.C. (2020). Temperature variation characteristics in flocculation settlement of tailings and its mechanism. Int. J. Min. Met. 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