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Preparation and Mechanism of Alkaline-Activated Coal Gangue-Based Geopolymer Grouting Material.

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Title: Preparation and Mechanism of Alkaline-Activated Coal Gangue-Based Geopolymer Grouting Material.
Authors: Wang, Keyong1 (AUTHOR), Guo, Sihan1,2 (AUTHOR), Sun, Yuying1,3 (AUTHOR), Li, Kunlin2,4 (AUTHOR), Shi, Zhenyue1,3 (AUTHOR) skd992844@sdust.edu.cn, Wang, Qingbiao1,2,4 (AUTHOR), Tian, Chenglin1,3 (AUTHOR), Sun, Yong1,4 (AUTHOR)
Source: Materials (1996-1944). May2026, Vol. 19 Issue 9, p1812. 19p.
Subjects: Grouting, Compressive strength, Rheology, Sustainable buildings, Structural analysis (Science), Permeability, Underground construction
Abstract: To respond to the national "double carbon" strategic goal, promote the green and low-carbon transformation of the building materials industry, and develop low-carbon and environmentally friendly grouting materials, this study prepared an alkaline-activated coal gangue-based geopolymer grouting material (AACGM). The effects of CG content, alkali activator modulus, and alkali activator content on material fluidity, setting time, compressive strength, and impermeability were systematically studied using orthogonal tests. The optimal mix ratio was determined and the internal mechanism was revealed by microscopic analysis. The results show that the comprehensive performance is the best when the content of CG is 50%, the modulus of alkali activator is 1.6, and the content of alkali activator is 14%. The primary and secondary order of influence of various factors on the performance is as follows: CG content > alkali activator content > alkali activator modulus. Microscopic analysis revealed that the hydrolysis polymerization products of the material are mainly C-S-H, C-(N)-A-S-H gel, and zeolite-like phase, forming a dense three-dimensional network structure, which is the internal mechanism of its good mechanical and impermeability properties. This study provides a new concept for the utilization of CG, and the prepared materials are of great significance in the field of grouting reinforcement in underground engineering. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 193715618
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  Label: Title
  Group: Ti
  Data: Preparation and Mechanism of Alkaline-Activated Coal Gangue-Based Geopolymer Grouting Material.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Keyong%22">Wang, Keyong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Sihan%22">Guo, Sihan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Yuying%22">Sun, Yuying</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Kunlin%22">Li, Kunlin</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Zhenyue%22">Shi, Zhenyue</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> skd992844@sdust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Qingbiao%22">Wang, Qingbiao</searchLink><relatesTo>1,2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Chenglin%22">Tian, Chenglin</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Yong%22">Sun, Yong</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. May2026, Vol. 19 Issue 9, p1812. 19p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Grouting%22">Grouting</searchLink><br /><searchLink fieldCode="DE" term="%22Compressive+strength%22">Compressive strength</searchLink><br /><searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainable+buildings%22">Sustainable buildings</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Science%29%22">Structural analysis (Science)</searchLink><br /><searchLink fieldCode="DE" term="%22Permeability%22">Permeability</searchLink><br /><searchLink fieldCode="DE" term="%22Underground+construction%22">Underground construction</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To respond to the national "double carbon" strategic goal, promote the green and low-carbon transformation of the building materials industry, and develop low-carbon and environmentally friendly grouting materials, this study prepared an alkaline-activated coal gangue-based geopolymer grouting material (AACGM). The effects of CG content, alkali activator modulus, and alkali activator content on material fluidity, setting time, compressive strength, and impermeability were systematically studied using orthogonal tests. The optimal mix ratio was determined and the internal mechanism was revealed by microscopic analysis. The results show that the comprehensive performance is the best when the content of CG is 50%, the modulus of alkali activator is 1.6, and the content of alkali activator is 14%. The primary and secondary order of influence of various factors on the performance is as follows: CG content > alkali activator content > alkali activator modulus. Microscopic analysis revealed that the hydrolysis polymerization products of the material are mainly C-S-H, C-(N)-A-S-H gel, and zeolite-like phase, forming a dense three-dimensional network structure, which is the internal mechanism of its good mechanical and impermeability properties. This study provides a new concept for the utilization of CG, and the prepared materials are of great significance in the field of grouting reinforcement in underground engineering. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/ma19091812
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 19
        StartPage: 1812
    Subjects:
      – SubjectFull: Grouting
        Type: general
      – SubjectFull: Compressive strength
        Type: general
      – SubjectFull: Rheology
        Type: general
      – SubjectFull: Sustainable buildings
        Type: general
      – SubjectFull: Structural analysis (Science)
        Type: general
      – SubjectFull: Permeability
        Type: general
      – SubjectFull: Underground construction
        Type: general
    Titles:
      – TitleFull: Preparation and Mechanism of Alkaline-Activated Coal Gangue-Based Geopolymer Grouting Material.
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Wang, Keyong
      – PersonEntity:
          Name:
            NameFull: Guo, Sihan
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            NameFull: Sun, Yuying
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            NameFull: Li, Kunlin
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            NameFull: Shi, Zhenyue
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            NameFull: Wang, Qingbiao
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            NameFull: Tian, Chenglin
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            NameFull: Sun, Yong
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 19961944
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              Value: 19
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Materials (1996-1944)
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