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Improving flexural strength and toughness of geopolymer mortars through additively manufactured metallic rebars.

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Title: Improving flexural strength and toughness of geopolymer mortars through additively manufactured metallic rebars.
Authors: Farina, Ilenia1 ilenia.farina@uniparthenope.it, Modano, Mariano2 modano@unina.it, Zuccaro, Giulio2 zuccaro@unina.it, Goodall, Russell3 r.goodall@sheffield.ac.uk, Colangelo, Francesco1 colangelo@uniparthenope.it
Source: Composites: Part B, Engineering. Jul2018, Vol. 145, p155-161. 7p.
Subjects: Reinforcing bar testing, Reinforcement of elastomers, Fly ash, Surface roughness measurement, Interfacial stresses
Abstract: This paper presents the results of an experimental study on the flexural reinforcement of a geopolymer mortar through additively manufactured metallic rebars. A mortar employing a geopolymer binder with low calcium content fly ash is reinforced with Ti6Al4V rebars additively manufactured though electron beam melting. The effectiveness of reinforcements realized with rebars featuring either smooth or rough surface profiles is studied through three-point bending tests and post-test microscopy analysis. The given experimental results highlight micro and macroscale pullout failure mechanisms in specimens reinforced with rebars showing cylindrical embossments on the lateral surface, which remarkably improve the flexural strength and the interfacial bond strength of the analyzed mortar. The role played by the surface roughness of the reinforced elements on the bond-slip response of the matrix-rebar interface is highlighted, while drawing comparisons with available literature results on cement mortars. [ABSTRACT FROM AUTHOR]
Copyright of Composites: Part B, Engineering 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
An: 129753643
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Improving flexural strength and toughness of geopolymer mortars through additively manufactured metallic rebars.
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  Data: <searchLink fieldCode="JN" term="%22Composites%3A+Part+B%2C+Engineering%22">Composites: Part B, Engineering</searchLink>. Jul2018, Vol. 145, p155-161. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Reinforcing+bar+testing%22">Reinforcing bar testing</searchLink><br /><searchLink fieldCode="DE" term="%22Reinforcement+of+elastomers%22">Reinforcement of elastomers</searchLink><br /><searchLink fieldCode="DE" term="%22Fly+ash%22">Fly ash</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+roughness+measurement%22">Surface roughness measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Interfacial+stresses%22">Interfacial stresses</searchLink>
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  Data: This paper presents the results of an experimental study on the flexural reinforcement of a geopolymer mortar through additively manufactured metallic rebars. A mortar employing a geopolymer binder with low calcium content fly ash is reinforced with Ti6Al4V rebars additively manufactured though electron beam melting. The effectiveness of reinforcements realized with rebars featuring either smooth or rough surface profiles is studied through three-point bending tests and post-test microscopy analysis. The given experimental results highlight micro and macroscale pullout failure mechanisms in specimens reinforced with rebars showing cylindrical embossments on the lateral surface, which remarkably improve the flexural strength and the interfacial bond strength of the analyzed mortar. The role played by the surface roughness of the reinforced elements on the bond-slip response of the matrix-rebar interface is highlighted, while drawing comparisons with available literature results on cement mortars. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Composites: Part B, Engineering 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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      – Type: doi
        Value: 10.1016/j.compositesb.2018.03.017
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 155
    Subjects:
      – SubjectFull: Reinforcing bar testing
        Type: general
      – SubjectFull: Reinforcement of elastomers
        Type: general
      – SubjectFull: Fly ash
        Type: general
      – SubjectFull: Surface roughness measurement
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      – SubjectFull: Interfacial stresses
        Type: general
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      – TitleFull: Improving flexural strength and toughness of geopolymer mortars through additively manufactured metallic rebars.
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            NameFull: Farina, Ilenia
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            NameFull: Modano, Mariano
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            NameFull: Zuccaro, Giulio
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            NameFull: Colangelo, Francesco
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              Text: Jul2018
              Type: published
              Y: 2018
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