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Effect of sulfates on bond behavior between carbon fiber reinforced polymer sheets and concrete

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Title: Effect of sulfates on bond behavior between carbon fiber reinforced polymer sheets and concrete
Authors: Al-Rousan, R. rzalrousan@just.edu.jo, Haddad, R.1, Al-Sa’di, K.1
Source: Materials & Design. Jan2013, Vol. 43, p237-248. 12p.
Subjects: Sulfates, Chemical bonds, Carbon fiber-reinforced plastics, Mathematical models, Strains & stresses (Mechanics), Shear (Mechanics)
Abstract: Abstract: The bond–slip behavior between sulfate-damaged concrete and carbon fiber reinforced polymer-sheets was investigated using double shear pull-off concrete specimens. Concrete blocks (150×150×100mm) were subjected to two different levels of sulfate cyclic treatment before and after bonded to carbon fiber reinforced polymer (CFRP) sheets. Other sets of concrete specimens bonded and unbounded to CFRP were maintained in lime water as controls. CFRP were attached to concrete at three different CFRP bonded widths (bf ) of (50,100 and 150mm) and two CFRP bonded lengths (Lf ) of (65 and 85mm). Present and literature data were employed in the development of a statistical model to estimate the ultimate shear strength and slippage between CFRP sheets and sulfate-damaged concrete. The results showed reductions in the bond stress and corresponding slippage with further cyclic sulfate treatment, with specimens bonded to CFRP before showing better bond behaviors than those of specimens bonded to CFRP after sulfate treatment. The ultimate normal stress in CFRP sheets decreased with further sulfate treatment. The statistical model developed showed excellent fit of the data used and collected as indicated by the high R 2 (coefficients of determination) values. [Copyright &y& Elsevier]
Copyright of Materials & Design 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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Header DbId: egs
DbLabel: Engineering Source
An: 80027728
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Effect of sulfates on bond behavior between carbon fiber reinforced polymer sheets and concrete
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  Data: <searchLink fieldCode="AR" term="%22Al-Rousan%2C+R%2E%22">Al-Rousan, R.</searchLink><i> rzalrousan@just.edu.jo</i><br /><searchLink fieldCode="AR" term="%22Haddad%2C+R%2E%22">Haddad, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Al-Sa’di%2C+K%2E%22">Al-Sa’di, K.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%26+Design%22">Materials & Design</searchLink>. Jan2013, Vol. 43, p237-248. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Sulfates%22">Sulfates</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+bonds%22">Chemical bonds</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+fiber-reinforced+plastics%22">Carbon fiber-reinforced plastics</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models%22">Mathematical models</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+%28Mechanics%29%22">Shear (Mechanics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The bond–slip behavior between sulfate-damaged concrete and carbon fiber reinforced polymer-sheets was investigated using double shear pull-off concrete specimens. Concrete blocks (150×150×100mm) were subjected to two different levels of sulfate cyclic treatment before and after bonded to carbon fiber reinforced polymer (CFRP) sheets. Other sets of concrete specimens bonded and unbounded to CFRP were maintained in lime water as controls. CFRP were attached to concrete at three different CFRP bonded widths (bf ) of (50,100 and 150mm) and two CFRP bonded lengths (Lf ) of (65 and 85mm). Present and literature data were employed in the development of a statistical model to estimate the ultimate shear strength and slippage between CFRP sheets and sulfate-damaged concrete. The results showed reductions in the bond stress and corresponding slippage with further cyclic sulfate treatment, with specimens bonded to CFRP before showing better bond behaviors than those of specimens bonded to CFRP after sulfate treatment. The ultimate normal stress in CFRP sheets decreased with further sulfate treatment. The statistical model developed showed excellent fit of the data used and collected as indicated by the high R 2 (coefficients of determination) values. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Materials & Design 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.matdes.2012.07.018
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 237
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      – SubjectFull: Sulfates
        Type: general
      – SubjectFull: Chemical bonds
        Type: general
      – SubjectFull: Carbon fiber-reinforced plastics
        Type: general
      – SubjectFull: Mathematical models
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      – SubjectFull: Strains & stresses (Mechanics)
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      – SubjectFull: Shear (Mechanics)
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      – TitleFull: Effect of sulfates on bond behavior between carbon fiber reinforced polymer sheets and concrete
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            NameFull: Haddad, R.
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            NameFull: Al-Sa’di, K.
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            – D: 01
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              Text: Jan2013
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