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Influence of RPC grouting materials on shear behavior of wet joints in PCSBs with confining stress.

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Title: Influence of RPC grouting materials on shear behavior of wet joints in PCSBs with confining stress.
Authors: Feng, Jiahui1 (AUTHOR) jhfeng@mail2.gdut.edu.cn, Hu, Zebin1 (AUTHOR) 812676058@qq.com, Jiang, Haibo1 (AUTHOR) hbjiang@gdut.edu.cn, Hu, Jiahao1 (AUTHOR) 605026997@qq.com, Qiu, Yitao1 (AUTHOR) 1697137832@qq.com
Source: Construction & Building Materials. Sep2021, Vol. 299, pN.PAG-N.PAG. 1p.
Subjects: Strains & stresses (Mechanics), Precast concrete, High strength concrete, Grouting, Concrete beams, Reactive power
Abstract: • Shear performance of RPC-filled wet joints in precast concrete segmental beams. • Effect of primary parameters on the shear behavior of RPC- filled wet joints. • A simplified formula was proposed for the shear capacity of RPC-filled wet joints. Reactive power concrete (RPC), an advanced cement-based material, has excellent mechanical properties. The cast-in-place wet joints are located in the middle of precast concrete segmental beams (PCSBs) which could eliminate the errors caused by the assembly of the precast concrete segments. Due to the discontinuity of the reinforcements and complicated stress conditions, those wet joints are the weak parts in the PCSBs. Pouring RPC grouting materials in wet joints could effectively improve the cracking resistance. This research not only puts emphasis on the influence of the geometry of wet joints, including shear key depth (25 mm, 35 mm, and 45 mm), but also reveals the influence of confining stress (0.5 MPa and 2.0 MPa), different concrete type (PRC with and without steel fibers), and different volume fractions of steel fibers (0.5% and 2.0%) on shear behavior. The results showed that higher shear capacity of RPC joints could be obtained by exerting a higher confining stress on the specimens, or using a concrete with higher tensile strength. Shear capacity of RPC joint with 2.0% steel fibers in volume fraction increased by 67.87% than that with 0.5% steel fibers in volume fraction. The AASHTO 2003 formula overestimated the shear capacity of the wet joints, showing an average ratio of calculated results to the experimental ones of 1.69, with a standard deviation of 0.53. A simplified formula was proposed to calculate the shear capacity of RPC joints based on tensile strength of concrete and Mohr's circle. The results from the simplified formula were found to agree well with the experimental values, inferred from an average ratio of the predicted values to experimental results of 1.10, with a standard deviation of 0.12. [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.)
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DbLabel: Engineering Source
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  Label: Title
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  Data: Influence of RPC grouting materials on shear behavior of wet joints in PCSBs with confining stress.
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  Data: <searchLink fieldCode="AR" term="%22Feng%2C+Jiahui%22">Feng, Jiahui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jhfeng@mail2.gdut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Hu%2C+Zebin%22">Hu, Zebin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 812676058@qq.com</i><br /><searchLink fieldCode="AR" term="%22Jiang%2C+Haibo%22">Jiang, Haibo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hbjiang@gdut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Hu%2C+Jiahao%22">Hu, Jiahao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 605026997@qq.com</i><br /><searchLink fieldCode="AR" term="%22Qiu%2C+Yitao%22">Qiu, Yitao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 1697137832@qq.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Sep2021, Vol. 299, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Precast+concrete%22">Precast concrete</searchLink><br /><searchLink fieldCode="DE" term="%22High+strength+concrete%22">High strength concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Grouting%22">Grouting</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+beams%22">Concrete beams</searchLink><br /><searchLink fieldCode="DE" term="%22Reactive+power%22">Reactive power</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • Shear performance of RPC-filled wet joints in precast concrete segmental beams. • Effect of primary parameters on the shear behavior of RPC- filled wet joints. • A simplified formula was proposed for the shear capacity of RPC-filled wet joints. Reactive power concrete (RPC), an advanced cement-based material, has excellent mechanical properties. The cast-in-place wet joints are located in the middle of precast concrete segmental beams (PCSBs) which could eliminate the errors caused by the assembly of the precast concrete segments. Due to the discontinuity of the reinforcements and complicated stress conditions, those wet joints are the weak parts in the PCSBs. Pouring RPC grouting materials in wet joints could effectively improve the cracking resistance. This research not only puts emphasis on the influence of the geometry of wet joints, including shear key depth (25 mm, 35 mm, and 45 mm), but also reveals the influence of confining stress (0.5 MPa and 2.0 MPa), different concrete type (PRC with and without steel fibers), and different volume fractions of steel fibers (0.5% and 2.0%) on shear behavior. The results showed that higher shear capacity of RPC joints could be obtained by exerting a higher confining stress on the specimens, or using a concrete with higher tensile strength. Shear capacity of RPC joint with 2.0% steel fibers in volume fraction increased by 67.87% than that with 0.5% steel fibers in volume fraction. The AASHTO 2003 formula overestimated the shear capacity of the wet joints, showing an average ratio of calculated results to the experimental ones of 1.69, with a standard deviation of 0.53. A simplified formula was proposed to calculate the shear capacity of RPC joints based on tensile strength of concrete and Mohr's circle. The results from the simplified formula were found to agree well with the experimental values, inferred from an average ratio of the predicted values to experimental results of 1.10, with a standard deviation of 0.12. [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:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.conbuildmat.2021.123993
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Precast concrete
        Type: general
      – SubjectFull: High strength concrete
        Type: general
      – SubjectFull: Grouting
        Type: general
      – SubjectFull: Concrete beams
        Type: general
      – SubjectFull: Reactive power
        Type: general
    Titles:
      – TitleFull: Influence of RPC grouting materials on shear behavior of wet joints in PCSBs with confining stress.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Feng, Jiahui
      – PersonEntity:
          Name:
            NameFull: Hu, Zebin
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            NameFull: Jiang, Haibo
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            NameFull: Hu, Jiahao
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            NameFull: Qiu, Yitao
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          Dates:
            – D: 13
              M: 09
              Text: Sep2021
              Type: published
              Y: 2021
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              Value: 09500618
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              Value: 299
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            – TitleFull: Construction & Building Materials
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