A new calcium sulfate-based plaster composed of composite particles

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• 作者：Aranda Berenger ; Guillou Olivier ; Christophe Lanos…
• 关键词：γ ; Anhydrite ; Hemihydrate ; Grain model ; Thermal characterization
• 刊名：Materials and Structures
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：48
• 期：8
• 页码：2685-2696
• 全文大小：3,299 KB
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• 作者单位：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. Université européenne de Bretagne, Rennes, France
  2. Institut des Sciences Chimiques de Rennes, INSA, UMR 6226, 35708, Rennes, France
  4. I-KR SAS, 20 Avenue des buttes de Co?smes, 35708, Rennes, France
  3. Laboratoire de Génie Civil et de Génie Mécanique, IUT de Rennes, EA 3913, 35704, Rennes, France
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

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.