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Crystal chemistry of clinker relicts from aged cementitious materials.

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Title: Crystal chemistry of clinker relicts from aged cementitious materials.
Authors: Secco, Michele1,2 michele.secco@unipd.it, Peruzzo, Luca3, Palasse, Laurie4, Artioli, Gilberto1,5, Viani, Alberto6, Francesco Gualtieri, Alessandro7
Source: Journal of Applied Crystallography. Oct2014, Vol. 47 Issue 5, p1626-1637. 12p.
Subjects: Portland cement, Clinker brick, Crystal structure, Electron probe microanalysis, Ferrites, Aluminates, Scanning electron microscopy
Abstract: Despite the general tendency to consider Portland cement virtually fully hydrated within a few years, the occurrence of non-reacted clinker phases in cementitious materials that are several decades old is rather common. In this work, the integration of microstructural analysis by scanning electron microscopy and quantitative microchemical and micromineralogical characterization techniques, such as electron microprobe analysis and electron backscatter diffraction, allowed the definition of the crystal-chemical properties of partially hydrated cement residuals within different types of aged cementitious materials. The results on several clinker relicts show that the calcium silicate phases are transformed systematically and pervasively by hydration reactions, whereas the aluminate and ferrite phases do frequently persist in the anhydrous state. These relict phases may be distinguished through their peculiar chemical, mineralogical and textural features. These observations raise interesting questions concerning the long-term hydration kinetics of clinker phases and the durability behaviour of cementitious materials in operating conditions. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Applied Crystallography is the property of Wiley-Blackwell 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: 108775634
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Crystal chemistry of clinker relicts from aged cementitious materials.
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  Data: <searchLink fieldCode="AR" term="%22Secco%2C+Michele%22">Secco, Michele</searchLink><relatesTo>1,2</relatesTo><i> michele.secco@unipd.it</i><br /><searchLink fieldCode="AR" term="%22Peruzzo%2C+Luca%22">Peruzzo, Luca</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Palasse%2C+Laurie%22">Palasse, Laurie</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Artioli%2C+Gilberto%22">Artioli, Gilberto</searchLink><relatesTo>1,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Viani%2C+Alberto%22">Viani, Alberto</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Francesco+Gualtieri%2C+Alessandro%22">Francesco Gualtieri, Alessandro</searchLink><relatesTo>7</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Applied+Crystallography%22">Journal of Applied Crystallography</searchLink>. Oct2014, Vol. 47 Issue 5, p1626-1637. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Portland+cement%22">Portland cement</searchLink><br /><searchLink fieldCode="DE" term="%22Clinker+brick%22">Clinker brick</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+structure%22">Crystal structure</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+probe+microanalysis%22">Electron probe microanalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Ferrites%22">Ferrites</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminates%22">Aluminates</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Despite the general tendency to consider Portland cement virtually fully hydrated within a few years, the occurrence of non-reacted clinker phases in cementitious materials that are several decades old is rather common. In this work, the integration of microstructural analysis by scanning electron microscopy and quantitative microchemical and micromineralogical characterization techniques, such as electron microprobe analysis and electron backscatter diffraction, allowed the definition of the crystal-chemical properties of partially hydrated cement residuals within different types of aged cementitious materials. The results on several clinker relicts show that the calcium silicate phases are transformed systematically and pervasively by hydration reactions, whereas the aluminate and ferrite phases do frequently persist in the anhydrous state. These relict phases may be distinguished through their peculiar chemical, mineralogical and textural features. These observations raise interesting questions concerning the long-term hydration kinetics of clinker phases and the durability behaviour of cementitious materials in operating conditions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Applied Crystallography is the property of Wiley-Blackwell 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:
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    Identifiers:
      – Type: doi
        Value: 10.1107/S1600576714018287
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 1626
    Subjects:
      – SubjectFull: Portland cement
        Type: general
      – SubjectFull: Clinker brick
        Type: general
      – SubjectFull: Crystal structure
        Type: general
      – SubjectFull: Electron probe microanalysis
        Type: general
      – SubjectFull: Ferrites
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      – SubjectFull: Aluminates
        Type: general
      – SubjectFull: Scanning electron microscopy
        Type: general
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      – TitleFull: Crystal chemistry of clinker relicts from aged cementitious materials.
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            NameFull: Secco, Michele
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            NameFull: Peruzzo, Luca
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            NameFull: Palasse, Laurie
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            NameFull: Artioli, Gilberto
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            NameFull: Viani, Alberto
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            NameFull: Francesco Gualtieri, Alessandro
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            – D: 01
              M: 10
              Text: Oct2014
              Type: published
              Y: 2014
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              Value: 47
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