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Evaluation of hybrid fibre-reinforced concrete slabs in terms of punching shear.

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Title: Evaluation of hybrid fibre-reinforced concrete slabs in terms of punching shear.
Authors: Labib, Wafa Abdelmajeed1 (AUTHOR) wlabib@psu.edu.sa
Source: Construction & Building Materials. Nov2020, Vol. 260, pN.PAG-N.PAG. 1p.
Subjects: Concrete slabs, Concrete columns, Concrete mixing, Flexural strength, Compressive strength, Fibers
Abstract: • Punching shear of SFC and HFC slab-column connection were experimentally studied. • Mechanical properties of SFC and HFC were studied. • Different fibre type and volume were used for determining the samples. • HFC is more effective than SFC in improving punching shear. • HFC is more effective than SFC in improving concrete mechanical properties. This study aims to investigate the influence of hybrid steel-polypropylene fibres in enhancing the capacity of punching shear with respect to concrete slab column connection. This paper adopted the experimental programme of studies to evaluate the influence of hybrid fibre on the punching shear as a key property of a concrete member. The experimental programme, supporting this investigation, involved samples of three mixtures in addition to a reference plain concrete mixture (PC). Fibre type and volume were the factors that have been used for determining these mixtures. The mixtures included single fibre concrete (SFC) mix with steel fibre volume of 0.5%, hybrid fibre-reinforced concrete mix (HFC1) with steel fibre volume of 0.5%, polypropylene fibre volume of 0.2%, hybrid fibre-reinforced concrete mix (HFC2) with steel fibre volume of 1.5%, and polypropylene fibre volume of 0.2%. The experimental programme adopted the use of 600 mm diameter circular slab specimens with overall depth of 75 mm to test the punching shear. The experimental study further investigated the influence of the hybrid fibres on other concrete properties including compressive and, flexural strength; 150-mm cubic specimens and 150 × 150 × 600 mm prismatic beams were used to measure the compressive and flexural strengths, respectively. The results of the study demonstrated a significant improvement in the punching shear capacity in hybrid fibre concrete mixes over plain and single fibre concrete mixes. This improvement has also been demonstrated in other concrete properties including compressive strength, flexural strength, cracking behaviour, ductility, and toughness. The improvement in the concrete properties was observed to be high in HFC2 mixture (0.2% PP, 1.5% SF), and on comparison with the plain concrete mixture a notable increase of 34% in punching sheer capacity was recorded. [ABSTRACT FROM AUTHOR]
Copyright of Construction & Building Materials is the property of Elsevier B.V. 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
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Evaluation of hybrid fibre-reinforced concrete slabs in terms of punching shear.
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  Data: <searchLink fieldCode="AR" term="%22Labib%2C+Wafa+Abdelmajeed%22">Labib, Wafa Abdelmajeed</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wlabib@psu.edu.sa</i>
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Nov2020, Vol. 260, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Concrete+slabs%22">Concrete slabs</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+columns%22">Concrete columns</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+mixing%22">Concrete mixing</searchLink><br /><searchLink fieldCode="DE" term="%22Flexural+strength%22">Flexural strength</searchLink><br /><searchLink fieldCode="DE" term="%22Compressive+strength%22">Compressive strength</searchLink><br /><searchLink fieldCode="DE" term="%22Fibers%22">Fibers</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: • Punching shear of SFC and HFC slab-column connection were experimentally studied. • Mechanical properties of SFC and HFC were studied. • Different fibre type and volume were used for determining the samples. • HFC is more effective than SFC in improving punching shear. • HFC is more effective than SFC in improving concrete mechanical properties. This study aims to investigate the influence of hybrid steel-polypropylene fibres in enhancing the capacity of punching shear with respect to concrete slab column connection. This paper adopted the experimental programme of studies to evaluate the influence of hybrid fibre on the punching shear as a key property of a concrete member. The experimental programme, supporting this investigation, involved samples of three mixtures in addition to a reference plain concrete mixture (PC). Fibre type and volume were the factors that have been used for determining these mixtures. The mixtures included single fibre concrete (SFC) mix with steel fibre volume of 0.5%, hybrid fibre-reinforced concrete mix (HFC1) with steel fibre volume of 0.5%, polypropylene fibre volume of 0.2%, hybrid fibre-reinforced concrete mix (HFC2) with steel fibre volume of 1.5%, and polypropylene fibre volume of 0.2%. The experimental programme adopted the use of 600 mm diameter circular slab specimens with overall depth of 75 mm to test the punching shear. The experimental study further investigated the influence of the hybrid fibres on other concrete properties including compressive and, flexural strength; 150-mm cubic specimens and 150 × 150 × 600 mm prismatic beams were used to measure the compressive and flexural strengths, respectively. The results of the study demonstrated a significant improvement in the punching shear capacity in hybrid fibre concrete mixes over plain and single fibre concrete mixes. This improvement has also been demonstrated in other concrete properties including compressive strength, flexural strength, cracking behaviour, ductility, and toughness. The improvement in the concrete properties was observed to be high in HFC2 mixture (0.2% PP, 1.5% SF), and on comparison with the plain concrete mixture a notable increase of 34% in punching sheer capacity was recorded. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Construction & Building Materials is the property of Elsevier B.V. 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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      – Type: doi
        Value: 10.1016/j.conbuildmat.2020.119763
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Concrete slabs
        Type: general
      – SubjectFull: Concrete columns
        Type: general
      – SubjectFull: Concrete mixing
        Type: general
      – SubjectFull: Flexural strength
        Type: general
      – SubjectFull: Compressive strength
        Type: general
      – SubjectFull: Fibers
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      – TitleFull: Evaluation of hybrid fibre-reinforced concrete slabs in terms of punching shear.
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              M: 11
              Text: Nov2020
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              Y: 2020
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              Value: 260
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