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Dynamic Compressive Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Geopolymer Composites.

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Title: Dynamic Compressive Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Geopolymer Composites.
Authors: Li, Mingyang1 (AUTHOR), Liu, Qi1 (AUTHOR), Tan, Yizhong1 (AUTHOR) tanyizhong@aeu.edu.cn, Dai, Fanfei1 (AUTHOR), Wang, Shenghui1 (AUTHOR)
Source: Materials (1996-1944). Mar2026, Vol. 19 Issue 6, p1128. 25p.
Subjects: Compressive strength, Hopkinson bars (Testing), Polyvinyl alcohol, Fibers, Energy dissipation, Composite materials
Abstract: Polyvinyl alcohol (PVA) fibers are commonly added to fiber-reinforced geopolymer composites (FRGC) to enhance their properties; however, systematic research on the dynamic mechanical properties of polyvinyl alcohol fiber-reinforced geopolymer composites (PVA-FRGC) is still required. In this study, an orthogonal experimental design was adopted to investigate the effects of the fly ash/slag ratio, fiber length, and fiber volume content on the dynamic mechanical properties (dynamic compressive strength, fragmentation degree, and energy absorption capacity) of PVA-FRGC. A split Hopkinson pressure bar (SHPB) was used to test the dynamic mechanical properties of the material. The results indicate that the fly ash/slag ratio, fiber length, and fiber volume content all exert significant effects on the dynamic compressive strength and energy absorption capacity of PVA-FRGC. The addition of PVA fibers significantly improves the dynamic compressive strength of PVA-FRGC, which reaches 157.52 MPa, 183.26 MPa, and 210.68 MPa under three different strain rates ranging from 75.4 s−1 to 179.6 s−1, respectively. Although the energy absorption capacity of PVA-FRGC is not significantly improved, the integrity of the specimens after fragmentation is remarkably enhanced. Specifically, under the three load levels, the average particle sizes of PVA-FRGC are 241.43%, 245.04%, and 127.80% higher than those of plain geopolymers, respectively. Considering the comprehensive dynamic mechanical properties, a fly ash/slag ratio of 5:5, a fiber length of 9 mm, and fiber volume content of 2.0% can be regarded as the local optimal mix proportion. [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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  Data: Dynamic Compressive Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Geopolymer Composites.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Mingyang%22">Li, Mingyang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Qi%22">Liu, Qi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tan%2C+Yizhong%22">Tan, Yizhong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> tanyizhong@aeu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Dai%2C+Fanfei%22">Dai, Fanfei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Shenghui%22">Wang, Shenghui</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Mar2026, Vol. 19 Issue 6, p1128. 25p.
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  Data: <searchLink fieldCode="DE" term="%22Compressive+strength%22">Compressive strength</searchLink><br /><searchLink fieldCode="DE" term="%22Hopkinson+bars+%28Testing%29%22">Hopkinson bars (Testing)</searchLink><br /><searchLink fieldCode="DE" term="%22Polyvinyl+alcohol%22">Polyvinyl alcohol</searchLink><br /><searchLink fieldCode="DE" term="%22Fibers%22">Fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Polyvinyl alcohol (PVA) fibers are commonly added to fiber-reinforced geopolymer composites (FRGC) to enhance their properties; however, systematic research on the dynamic mechanical properties of polyvinyl alcohol fiber-reinforced geopolymer composites (PVA-FRGC) is still required. In this study, an orthogonal experimental design was adopted to investigate the effects of the fly ash/slag ratio, fiber length, and fiber volume content on the dynamic mechanical properties (dynamic compressive strength, fragmentation degree, and energy absorption capacity) of PVA-FRGC. A split Hopkinson pressure bar (SHPB) was used to test the dynamic mechanical properties of the material. The results indicate that the fly ash/slag ratio, fiber length, and fiber volume content all exert significant effects on the dynamic compressive strength and energy absorption capacity of PVA-FRGC. The addition of PVA fibers significantly improves the dynamic compressive strength of PVA-FRGC, which reaches 157.52 MPa, 183.26 MPa, and 210.68 MPa under three different strain rates ranging from 75.4 s−1 to 179.6 s−1, respectively. Although the energy absorption capacity of PVA-FRGC is not significantly improved, the integrity of the specimens after fragmentation is remarkably enhanced. Specifically, under the three load levels, the average particle sizes of PVA-FRGC are 241.43%, 245.04%, and 127.80% higher than those of plain geopolymers, respectively. Considering the comprehensive dynamic mechanical properties, a fly ash/slag ratio of 5:5, a fiber length of 9 mm, and fiber volume content of 2.0% can be regarded as the local optimal mix proportion. [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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        Value: 10.3390/ma19061128
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      – Code: eng
        Text: English
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        PageCount: 25
        StartPage: 1128
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      – SubjectFull: Compressive strength
        Type: general
      – SubjectFull: Hopkinson bars (Testing)
        Type: general
      – SubjectFull: Polyvinyl alcohol
        Type: general
      – SubjectFull: Fibers
        Type: general
      – SubjectFull: Energy dissipation
        Type: general
      – SubjectFull: Composite materials
        Type: general
    Titles:
      – TitleFull: Dynamic Compressive Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Geopolymer Composites.
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            NameFull: Li, Mingyang
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            NameFull: Liu, Qi
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            NameFull: Tan, Yizhong
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            – D: 15
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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              Value: 19
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