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Thermal Conductivity of Seawater Cement-Based Materials: Effect of Water-to-Cement Ratio, Curing Age, Sand Content, and Porosity.

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Title: Thermal Conductivity of Seawater Cement-Based Materials: Effect of Water-to-Cement Ratio, Curing Age, Sand Content, and Porosity.
Authors: Du, He1 (AUTHOR) duhe3@mail2.sysu.edu.cn, Chen, Yuxuan2 (AUTHOR) chenyx559@mail2.sysu.edu.cn, Yan, Han3 (AUTHOR) wtl820520@163.com, Song, Baocang4 (AUTHOR) 30073232@qq.com, Liu, Jiankun5 (AUTHOR) liujiank@mail.sysu.edu.cn, Liang, Siming6 (AUTHOR) liangsm8@mail.sysu.edu.cn
Source: Journal of Materials in Civil Engineering. Sep2023, Vol. 35 Issue 9, p1-11. 11p.
Subjects: Thermal conductivity, Seawater, Porosity, Petrophysics, Seawater salinity, Sand, Pore water, Water salinization
Abstract: The microstructures of seawater cement-based materials normally are influenced by the salinity in seawater, which could result in different properties. The thermal conductivity (λ -value) of seawater cement-based materials is a key input parameter for the heat transfer analysis. However, few studies have been conducted on this issue. This study investigated the λ -value of seawater cement-based materials using experimental and numerical methods. The influences of water-to-cement (w/c) ratio, curing age, and sand content on the λ -value of seawater cement-based materials were examined experimentally. Then a three-dimensional mesoscale finite-element model was established to assess the influences of pore size and porosity on the λ -value of cement-based materials. It was found that the λ -value of seawater cement-based materials increases with increasing curing age or sand content, and a low w/c ratio contributes to a high λ -value, similar to that of the tap-water cementitious material. The λ -value of seawater cement paste with curing ages of 1 and 7 days was slightly greater than that of the tap-water cement paste. However, no significant difference was found between the λ -values of the 28-day seawater and tap-water cement pastes. Pore size had a negligible influence on the λ -value. The λ -value of cement-based materials decreased with increasing porosity, and the decrease in λ -value of cement-based materials with pores filled with air was more significant than that with pores filled with water, indicating that the pore-water saturation has a great effect on the thermal conductivity. [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.)
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DbLabel: Engineering Source
An: 164959181
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  Data: Thermal Conductivity of Seawater Cement-Based Materials: Effect of Water-to-Cement Ratio, Curing Age, Sand Content, and Porosity.
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  Data: <searchLink fieldCode="AR" term="%22Du%2C+He%22">Du, He</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> duhe3@mail2.sysu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Yuxuan%22">Chen, Yuxuan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> chenyx559@mail2.sysu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yan%2C+Han%22">Yan, Han</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> wtl820520@163.com</i><br /><searchLink fieldCode="AR" term="%22Song%2C+Baocang%22">Song, Baocang</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> 30073232@qq.com</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Jiankun%22">Liu, Jiankun</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> liujiank@mail.sysu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Liang%2C+Siming%22">Liang, Siming</searchLink><relatesTo>6</relatesTo> (AUTHOR)<i> liangsm8@mail.sysu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+in+Civil+Engineering%22">Journal of Materials in Civil Engineering</searchLink>. Sep2023, Vol. 35 Issue 9, p1-11. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Seawater%22">Seawater</searchLink><br /><searchLink fieldCode="DE" term="%22Porosity%22">Porosity</searchLink><br /><searchLink fieldCode="DE" term="%22Petrophysics%22">Petrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Seawater+salinity%22">Seawater salinity</searchLink><br /><searchLink fieldCode="DE" term="%22Sand%22">Sand</searchLink><br /><searchLink fieldCode="DE" term="%22Pore+water%22">Pore water</searchLink><br /><searchLink fieldCode="DE" term="%22Water+salinization%22">Water salinization</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The microstructures of seawater cement-based materials normally are influenced by the salinity in seawater, which could result in different properties. The thermal conductivity (λ -value) of seawater cement-based materials is a key input parameter for the heat transfer analysis. However, few studies have been conducted on this issue. This study investigated the λ -value of seawater cement-based materials using experimental and numerical methods. The influences of water-to-cement (w/c) ratio, curing age, and sand content on the λ -value of seawater cement-based materials were examined experimentally. Then a three-dimensional mesoscale finite-element model was established to assess the influences of pore size and porosity on the λ -value of cement-based materials. It was found that the λ -value of seawater cement-based materials increases with increasing curing age or sand content, and a low w/c ratio contributes to a high λ -value, similar to that of the tap-water cementitious material. The λ -value of seawater cement paste with curing ages of 1 and 7 days was slightly greater than that of the tap-water cement paste. However, no significant difference was found between the λ -values of the 28-day seawater and tap-water cement pastes. Pore size had a negligible influence on the λ -value. The λ -value of cement-based materials decreased with increasing porosity, and the decrease in λ -value of cement-based materials with pores filled with air was more significant than that with pores filled with water, indicating that the pore-water saturation has a great effect on the thermal conductivity. [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/JMCEE7.MTENG-15810
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 1
    Subjects:
      – SubjectFull: Thermal conductivity
        Type: general
      – SubjectFull: Seawater
        Type: general
      – SubjectFull: Porosity
        Type: general
      – SubjectFull: Petrophysics
        Type: general
      – SubjectFull: Seawater salinity
        Type: general
      – SubjectFull: Sand
        Type: general
      – SubjectFull: Pore water
        Type: general
      – SubjectFull: Water salinization
        Type: general
    Titles:
      – TitleFull: Thermal Conductivity of Seawater Cement-Based Materials: Effect of Water-to-Cement Ratio, Curing Age, Sand Content, and Porosity.
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          Name:
            NameFull: Du, He
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            NameFull: Chen, Yuxuan
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            NameFull: Yan, Han
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            NameFull: Song, Baocang
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            NameFull: Liu, Jiankun
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            NameFull: Liang, Siming
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          Dates:
            – D: 01
              M: 09
              Text: Sep2023
              Type: published
              Y: 2023
          Identifiers:
            – Type: issn-print
              Value: 08991561
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              Value: 35
            – Type: issue
              Value: 9
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            – TitleFull: Journal of Materials in Civil Engineering
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