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Materials and Structures

, Volume 48, Issue 8, pp 2685–2696 | Cite as

A new calcium sulfate-based plaster composed of composite particles

  • Aranda Berenger
  • Guillou Olivier
  • Christophe Lanos
  • Carole Daiguebonne
  • Stéphane Freslon
  • Christophe Tessier
  • Mélissa Laurans
  • Christophe Baux
  • Hélène Greffet
Original Article

Abstract

Flash-calcination of gypsum by a new patented process produces a particular type of plaster. This particular plaster has been characterized and compared to a classical β-plaster. It appears as a stable mixture of hemihydrate and of γ-anhydrite. Because of its composition, this new plaster presents several stable states depending on the storage conditions. A study of its reactivity followed by XRD and thermal analyses has been realized. It reveals that even after several months of exposition under moist atmosphere, γ-anhydrite is still present in the sample. A model of composite particle of plaster is proposed for explaining this unusual behavior.

Keywords

γ-Anhydrite Hemihydrate Grain model Thermal characterization 

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Copyright information

© RILEM 2014

Authors and Affiliations

  • Aranda Berenger
    • 1
    • 2
    • 4
  • Guillou Olivier
    • 1
    • 2
  • Christophe Lanos
    • 1
    • 3
  • Carole Daiguebonne
    • 1
    • 2
  • Stéphane Freslon
    • 1
    • 2
  • Christophe Tessier
    • 4
  • Mélissa Laurans
    • 1
    • 4
  • Christophe Baux
    • 1
    • 3
  • Hélène Greffet
    • 1
    • 2
  1. 1.Université européenne de BretagneRennesFrance
  2. 2.Institut des Sciences Chimiques de RennesINSA, UMR 6226RennesFrance
  3. 3.Laboratoire de Génie Civil et de Génie MécaniqueIUT de Rennes, EA 3913RennesFrance
  4. 4.I-KR SASRennesFrance

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