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Examining the structural viability of recycled fine aggregates in sustainable concrete.

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Title: Examining the structural viability of recycled fine aggregates in sustainable concrete.
Authors: Panghal, Harish1 (AUTHOR) harish_phd2k18@dtu.ac.in, Kumar, Awadhesh1 (AUTHOR)
Source: Journal of Mechanical Science & Technology. Jun2024, Vol. 38 Issue 6, p2931-2942. 12p.
Subjects: Elastic modulus, Concrete, Mineral aggregates, Pozzolanic reaction, Tensile strength, Compressive strength
Abstract: This study investigates the potential of incorporating recycled fine aggregates (RFA) into sustainable concrete. In this research, a conventional compaction technique is utilized to establish the order of compressive strength and, consequently, to assess particle packing density in terms of weight within a specific cylindrical volume and evaluate workability, compressive and flexural strengths, splitting tensile strength, elasticity modulus, and microstructural properties (analyzed through XRD, SEM, and EDAX). The study found that RFA can improve concrete properties, hardened characteristics, and microstructure up to an optimum 25 % RFA replacement threshold (RFA 25). Beyond this value, concrete strength and microstructure deteriorate. RFA 25 exhibits significantly higher compressive (14.75 %), flexural (6.61 %), and splitting tensile (13.14 %) strengths compared with the reference concrete, along with a 5.71 % decrease in the modulus of elasticity. Lower replacement levels promoted pozzolanic reactions, enhancing strength through additional hydration products, whereas higher replacements reduced strength. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Mechanical Science & Technology is the property of Springer Nature 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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  Data: Examining the structural viability of recycled fine aggregates in sustainable concrete.
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  Data: <searchLink fieldCode="AR" term="%22Panghal%2C+Harish%22">Panghal, Harish</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> harish_phd2k18@dtu.ac.in</i><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Awadhesh%22">Kumar, Awadhesh</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Mechanical+Science+%26+Technology%22">Journal of Mechanical Science & Technology</searchLink>. Jun2024, Vol. 38 Issue 6, p2931-2942. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Elastic+modulus%22">Elastic modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete%22">Concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Mineral+aggregates%22">Mineral aggregates</searchLink><br /><searchLink fieldCode="DE" term="%22Pozzolanic+reaction%22">Pozzolanic reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Tensile+strength%22">Tensile strength</searchLink><br /><searchLink fieldCode="DE" term="%22Compressive+strength%22">Compressive strength</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: This study investigates the potential of incorporating recycled fine aggregates (RFA) into sustainable concrete. In this research, a conventional compaction technique is utilized to establish the order of compressive strength and, consequently, to assess particle packing density in terms of weight within a specific cylindrical volume and evaluate workability, compressive and flexural strengths, splitting tensile strength, elasticity modulus, and microstructural properties (analyzed through XRD, SEM, and EDAX). The study found that RFA can improve concrete properties, hardened characteristics, and microstructure up to an optimum 25 % RFA replacement threshold (RFA 25). Beyond this value, concrete strength and microstructure deteriorate. RFA 25 exhibits significantly higher compressive (14.75 %), flexural (6.61 %), and splitting tensile (13.14 %) strengths compared with the reference concrete, along with a 5.71 % decrease in the modulus of elasticity. Lower replacement levels promoted pozzolanic reactions, enhancing strength through additional hydration products, whereas higher replacements reduced strength. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Mechanical Science & Technology is the property of Springer Nature 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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        Value: 10.1007/s12206-024-0513-2
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 2931
    Subjects:
      – SubjectFull: Elastic modulus
        Type: general
      – SubjectFull: Concrete
        Type: general
      – SubjectFull: Mineral aggregates
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      – SubjectFull: Pozzolanic reaction
        Type: general
      – SubjectFull: Tensile strength
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      – SubjectFull: Compressive strength
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              M: 06
              Text: Jun2024
              Type: published
              Y: 2024
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