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Thermo-mechanical degradation of fibre–matrix bond and flexural behaviour in steel-fibre-reinforced concrete after elevated-temperature exposure.

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Title: Thermo-mechanical degradation of fibre–matrix bond and flexural behaviour in steel-fibre-reinforced concrete after elevated-temperature exposure.
Authors: Liu, Xinrong1 (AUTHOR), Wang, Wenjie1 (AUTHOR) wenjie.wang@seu.edu.cn, Zhang, Yunpeng1 (AUTHOR), Liu, Jianxun2 (AUTHOR)
Source: Magazine of Concrete Research. 2026, Vol. 78 Issue 9/10, p581-595. 15p.
Subjects: Fiber-matrix interfaces, High temperatures, Deterioration of materials, Fiber-reinforced concrete, Fiber testing, Bending strength
Abstract: The thermo-mechanical degradation of fibre–matrix bond and the flexural behaviour of steel-fibre-reinforced concrete (SFRC) specimens subjected to elevated temperatures (200°C, 400°C and 600°C) were investigated. Fibre pull-out and four-point bending tests were conducted independently to characterise the temperature-dependent degradation of interfacial bond and flexural response. The results showed that moderate heating (400°C) enhanced the bond strength and pull-out energy to, respectively, 158% and 188% of their room-temperature (20°C) values, owing to frictional strengthening and preserved matrix integrity. Severe deterioration occurred at 600°C, and both indices decreased to approximately 63% of their reference values owing to microcracking and chemical bond loss. Flexural strength decreased progressively with temperature, retaining 42.8% for SFRC and 24.7% for plain concrete at 600°C. Despite matrix damage, the SFRC exhibited stable ductility and higher fracture toughness, confirming the sustained efficiency of fibre bridging under thermal degradation. These findings provide insights into the temperature-dependent fibre–matrix bond degradation and corresponding flexural response of SFRC within the investigated temperature range of 200–600°C. [ABSTRACT FROM AUTHOR]
Copyright of Magazine of Concrete Research is the property of Emerald Publishing Limited 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 195151395
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Thermo-mechanical degradation of fibre–matrix bond and flexural behaviour in steel-fibre-reinforced concrete after elevated-temperature exposure.
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  Data: <searchLink fieldCode="JN" term="%22Magazine+of+Concrete+Research%22">Magazine of Concrete Research</searchLink>. 2026, Vol. 78 Issue 9/10, p581-595. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Fiber-matrix+interfaces%22">Fiber-matrix interfaces</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Deterioration+of+materials%22">Deterioration of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Fiber-reinforced+concrete%22">Fiber-reinforced concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Fiber+testing%22">Fiber testing</searchLink><br /><searchLink fieldCode="DE" term="%22Bending+strength%22">Bending strength</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The thermo-mechanical degradation of fibre–matrix bond and the flexural behaviour of steel-fibre-reinforced concrete (SFRC) specimens subjected to elevated temperatures (200°C, 400°C and 600°C) were investigated. Fibre pull-out and four-point bending tests were conducted independently to characterise the temperature-dependent degradation of interfacial bond and flexural response. The results showed that moderate heating (400°C) enhanced the bond strength and pull-out energy to, respectively, 158% and 188% of their room-temperature (20°C) values, owing to frictional strengthening and preserved matrix integrity. Severe deterioration occurred at 600°C, and both indices decreased to approximately 63% of their reference values owing to microcracking and chemical bond loss. Flexural strength decreased progressively with temperature, retaining 42.8% for SFRC and 24.7% for plain concrete at 600°C. Despite matrix damage, the SFRC exhibited stable ductility and higher fracture toughness, confirming the sustained efficiency of fibre bridging under thermal degradation. These findings provide insights into the temperature-dependent fibre–matrix bond degradation and corresponding flexural response of SFRC within the investigated temperature range of 200–600°C. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Magazine of Concrete Research is the property of Emerald Publishing Limited 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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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 15
        StartPage: 581
    Subjects:
      – SubjectFull: Fiber-matrix interfaces
        Type: general
      – SubjectFull: High temperatures
        Type: general
      – SubjectFull: Deterioration of materials
        Type: general
      – SubjectFull: Fiber-reinforced concrete
        Type: general
      – SubjectFull: Fiber testing
        Type: general
      – SubjectFull: Bending strength
        Type: general
    Titles:
      – TitleFull: Thermo-mechanical degradation of fibre–matrix bond and flexural behaviour in steel-fibre-reinforced concrete after elevated-temperature exposure.
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            NameFull: Liu, Xinrong
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            NameFull: Wang, Wenjie
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            NameFull: Zhang, Yunpeng
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            NameFull: Liu, Jianxun
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          Dates:
            – D: 01
              M: 07
              Text: 2026
              Type: published
              Y: 2026
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              Value: 78
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              Value: 9/10
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            – TitleFull: Magazine of Concrete Research
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