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Conversion of CO2 and Its Utilization in the Preparation of Cement-Slag-CaCO3 Ternary Blends.

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Title: Conversion of CO2 and Its Utilization in the Preparation of Cement-Slag-CaCO3 Ternary Blends.
Authors: Lin, Run-Sheng1 (AUTHOR) linrunsheng@kangwon.ac.kr, Wang, Xiao-Yong2 (AUTHOR) wxbrave@kangwon.ac.kr, Han, Yi3 (AUTHOR) hanyii@kangwon.ac.kr
Source: Journal of Materials in Civil Engineering. Mar2023, Vol. 35 Issue 3, p1-13. 13p.
Subjects: Ultrasonic testing, Carbon dioxide, Carbon emissions, Heat of hydration, Electrical resistivity
Abstract: A reduction in CO2 emissions is necessary in the concrete industry. This study proposes a CO2 conversion technique by which CO2 gas is converted into solid nano CaCO3 and used to replace the partial binder of cement-slag blends in ratios of 2%, 4%, and 6%. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy analyses confirmed the formation of hemicarboaluminate (Hc) and monocarboaluminate (Mc) due to the chemical reaction between nano CaCO3 and the Al2O3 phase in the binder. XRD analysis revealed that at 28 days, the addition of nano CaCO3 can inhibit the transformation of ettringite (AFt) to monosulfate (AFm). As the contents of nano CaCO3 increased, the hydration heat, strength, ultrasonic pulse velocity (UPV), electrical resistivity, and combined water content increased. The degree of increment of the electrical resistivity was more pronounced than that of the strength. For various specimens, the strength and combined water content presented a linear relationship, and the strength and UPV presented an exponential function. The reduction rate of normalized CO2 emissions (the ratio of CO2 emissions of the paste to its strength) was much higher than the replacement percentage of nano CaCO3. This was because nano CaCO3 increased the late strength and had a negative CO2 emission value. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials in Civil Engineering is the property of American Society of Civil Engineers 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: 161514252
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Conversion of CO2 and Its Utilization in the Preparation of Cement-Slag-CaCO3 Ternary Blends.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Run-Sheng%22">Lin, Run-Sheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> linrunsheng@kangwon.ac.kr</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Xiao-Yong%22">Wang, Xiao-Yong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> wxbrave@kangwon.ac.kr</i><br /><searchLink fieldCode="AR" term="%22Han%2C+Yi%22">Han, Yi</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> hanyii@kangwon.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+in+Civil+Engineering%22">Journal of Materials in Civil Engineering</searchLink>. Mar2023, Vol. 35 Issue 3, p1-13. 13p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Ultrasonic+testing%22">Ultrasonic testing</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+emissions%22">Carbon emissions</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+of+hydration%22">Heat of hydration</searchLink><br /><searchLink fieldCode="DE" term="%22Electrical+resistivity%22">Electrical resistivity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A reduction in CO2 emissions is necessary in the concrete industry. This study proposes a CO2 conversion technique by which CO2 gas is converted into solid nano CaCO3 and used to replace the partial binder of cement-slag blends in ratios of 2%, 4%, and 6%. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy analyses confirmed the formation of hemicarboaluminate (Hc) and monocarboaluminate (Mc) due to the chemical reaction between nano CaCO3 and the Al2O3 phase in the binder. XRD analysis revealed that at 28 days, the addition of nano CaCO3 can inhibit the transformation of ettringite (AFt) to monosulfate (AFm). As the contents of nano CaCO3 increased, the hydration heat, strength, ultrasonic pulse velocity (UPV), electrical resistivity, and combined water content increased. The degree of increment of the electrical resistivity was more pronounced than that of the strength. For various specimens, the strength and combined water content presented a linear relationship, and the strength and UPV presented an exponential function. The reduction rate of normalized CO2 emissions (the ratio of CO2 emissions of the paste to its strength) was much higher than the replacement percentage of nano CaCO3. This was because nano CaCO3 increased the late strength and had a negative CO2 emission value. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Materials in Civil Engineering is the property of American Society of Civil Engineers 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: 10.1061/(ASCE)MT.1943-5533.0004626
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Ultrasonic testing
        Type: general
      – SubjectFull: Carbon dioxide
        Type: general
      – SubjectFull: Carbon emissions
        Type: general
      – SubjectFull: Heat of hydration
        Type: general
      – SubjectFull: Electrical resistivity
        Type: general
    Titles:
      – TitleFull: Conversion of CO2 and Its Utilization in the Preparation of Cement-Slag-CaCO3 Ternary Blends.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Lin, Run-Sheng
      – PersonEntity:
          Name:
            NameFull: Wang, Xiao-Yong
      – PersonEntity:
          Name:
            NameFull: Han, Yi
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          Dates:
            – D: 01
              M: 03
              Text: Mar2023
              Type: published
              Y: 2023
          Identifiers:
            – Type: issn-print
              Value: 08991561
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              Value: 35
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Journal of Materials in Civil Engineering
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