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Particle size distribution of bentonite under different conditions: effect of the dispersion method.

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Title: Particle size distribution of bentonite under different conditions: effect of the dispersion method.
Authors: Zhang, Chenghao1 (AUTHOR) Chenghao.Zhang@Ugent.be, Bezuijen, Adam1 (AUTHOR)
Source: International Journal of Geotechnical Engineering. Sep2025, Vol. 19 Issue 9, p846-859. 14p.
Subjects: Particle size distribution, Drilling fluids, Drilling muds, Shearing force, Bentonite
Abstract: Bentonite, renowned for its absorption and swelling, is widely used as a drilling fluid. Its particle size distribution (PSD) significantly affects infiltration and filter cake formation, yet research frequently omits essential details like testing conditions, equipment, and concentration. To provide a comparative analysis, the PSD of commercial bentonites (Colclay D90 and IBECO S) was evaluated under dry, wet, and hydrated conditions. Hydrated bentonite prepared with high-speed mixing and hydration showed the smallest particle sizes, followed closely by sonication-dispersed wet bentonite, and then dry bentonite. The d85 differences between hydrated and dry states were substantial: 76.56 μm for Colclay and 136.07 μm for IBECO. Interestingly, Colclay had smaller dry particles but larger hydrated ones compared to IBECO. This study revealed there is no 'real' particle size for field slurries, as high concentrations increase PSD while mixing and shear stress may reduce it, emphasizing the importance of clearly describing PSD measurement methods. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Geotechnical Engineering is the property of Taylor & Francis Ltd 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: 188054621
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Particle size distribution of bentonite under different conditions: effect of the dispersion method.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Chenghao%22">Zhang, Chenghao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> Chenghao.Zhang@Ugent.be</i><br /><searchLink fieldCode="AR" term="%22Bezuijen%2C+Adam%22">Bezuijen, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Geotechnical+Engineering%22">International Journal of Geotechnical Engineering</searchLink>. Sep2025, Vol. 19 Issue 9, p846-859. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Drilling+fluids%22">Drilling fluids</searchLink><br /><searchLink fieldCode="DE" term="%22Drilling+muds%22">Drilling muds</searchLink><br /><searchLink fieldCode="DE" term="%22Shearing+force%22">Shearing force</searchLink><br /><searchLink fieldCode="DE" term="%22Bentonite%22">Bentonite</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Bentonite, renowned for its absorption and swelling, is widely used as a drilling fluid. Its particle size distribution (PSD) significantly affects infiltration and filter cake formation, yet research frequently omits essential details like testing conditions, equipment, and concentration. To provide a comparative analysis, the PSD of commercial bentonites (Colclay D90 and IBECO S) was evaluated under dry, wet, and hydrated conditions. Hydrated bentonite prepared with high-speed mixing and hydration showed the smallest particle sizes, followed closely by sonication-dispersed wet bentonite, and then dry bentonite. The d85 differences between hydrated and dry states were substantial: 76.56 μm for Colclay and 136.07 μm for IBECO. Interestingly, Colclay had smaller dry particles but larger hydrated ones compared to IBECO. This study revealed there is no 'real' particle size for field slurries, as high concentrations increase PSD while mixing and shear stress may reduce it, emphasizing the importance of clearly describing PSD measurement methods. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Geotechnical Engineering is the property of Taylor & Francis Ltd 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: 10.1080/19386362.2025.2559044
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 846
    Subjects:
      – SubjectFull: Particle size distribution
        Type: general
      – SubjectFull: Drilling fluids
        Type: general
      – SubjectFull: Drilling muds
        Type: general
      – SubjectFull: Shearing force
        Type: general
      – SubjectFull: Bentonite
        Type: general
    Titles:
      – TitleFull: Particle size distribution of bentonite under different conditions: effect of the dispersion method.
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            NameFull: Zhang, Chenghao
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            NameFull: Bezuijen, Adam
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            – D: 01
              M: 09
              Text: Sep2025
              Type: published
              Y: 2025
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              Value: 19
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              Value: 9
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            – TitleFull: International Journal of Geotechnical Engineering
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