{"title":"使用混合纤维的锂长石尾矿水泥基填料的弯曲性能和微观结构研究","authors":"Daopei Zhu, Suikang Zhang, Xiaoshun Wu","doi":"10.1016/j.dibe.2024.100455","DOIUrl":null,"url":null,"abstract":"<div><p>The brittle fracture and toughness of cemented tailings backfill (CTB) are not conducive to underground mining projects. Incorporating fibers may enhance the flexural properties of the CTB. This study used glass (GS) and polypropylene (PP) fibers to fabricate fiber-reinforced cemented lithium feldspar tailing backfill (FCLTB) specimens. The flexural strengths and microstructures of the specimens were analyzed using a three-point flexure test and scanned electron microscopy (SEM). Following a three-point bending test, it was observed that Upon decreasing the amount of GS fiber, the bending strength of the FCLTB specimens initially decreased and then increased. However, with an increase in the PP fiber content, the average bending module of the FCLTB specimens initially reduced and then rose. The combined use of GS and PP fibers significantly improved the toughness of the CLTB samples after the peak. Composite fibers resist the formation of cracks under load.</p></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":null,"pages":null},"PeriodicalIF":6.2000,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666165924001364/pdfft?md5=7def3136d66970e24ca3db7261102441&pid=1-s2.0-S2666165924001364-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Study on the flexural performance and microstructure of lithium feldspar tailings cementitious filler using mixed fibers\",\"authors\":\"Daopei Zhu, Suikang Zhang, Xiaoshun Wu\",\"doi\":\"10.1016/j.dibe.2024.100455\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The brittle fracture and toughness of cemented tailings backfill (CTB) are not conducive to underground mining projects. Incorporating fibers may enhance the flexural properties of the CTB. This study used glass (GS) and polypropylene (PP) fibers to fabricate fiber-reinforced cemented lithium feldspar tailing backfill (FCLTB) specimens. The flexural strengths and microstructures of the specimens were analyzed using a three-point flexure test and scanned electron microscopy (SEM). Following a three-point bending test, it was observed that Upon decreasing the amount of GS fiber, the bending strength of the FCLTB specimens initially decreased and then increased. However, with an increase in the PP fiber content, the average bending module of the FCLTB specimens initially reduced and then rose. The combined use of GS and PP fibers significantly improved the toughness of the CLTB samples after the peak. Composite fibers resist the formation of cracks under load.</p></div>\",\"PeriodicalId\":34137,\"journal\":{\"name\":\"Developments in the Built Environment\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.2000,\"publicationDate\":\"2024-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2666165924001364/pdfft?md5=7def3136d66970e24ca3db7261102441&pid=1-s2.0-S2666165924001364-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Developments in the Built Environment\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666165924001364\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Developments in the Built Environment","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666165924001364","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Study on the flexural performance and microstructure of lithium feldspar tailings cementitious filler using mixed fibers
The brittle fracture and toughness of cemented tailings backfill (CTB) are not conducive to underground mining projects. Incorporating fibers may enhance the flexural properties of the CTB. This study used glass (GS) and polypropylene (PP) fibers to fabricate fiber-reinforced cemented lithium feldspar tailing backfill (FCLTB) specimens. The flexural strengths and microstructures of the specimens were analyzed using a three-point flexure test and scanned electron microscopy (SEM). Following a three-point bending test, it was observed that Upon decreasing the amount of GS fiber, the bending strength of the FCLTB specimens initially decreased and then increased. However, with an increase in the PP fiber content, the average bending module of the FCLTB specimens initially reduced and then rose. The combined use of GS and PP fibers significantly improved the toughness of the CLTB samples after the peak. Composite fibers resist the formation of cracks under load.
期刊介绍：
Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.
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