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Fibre reinforced gypsum binder composite, its microstructure and durability

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Abstract

The effect of E-type glass fibre on the strength and durability of gypsum binder composites was studied under different climatic conditions and by accelerated methods. After 50 cycles of wetting and drying at 60°C an irregular deposition of gypsum binder products was found at the surface of glass fibres. Durability of E-type glass (borosilicate) fibres employed as reinforcement in the gypsum binder composites was examined after immersion into aqueous extract of gypsum binder at temperature 27° to 60°C. The exposed glass fibres were studied by scanning electron microscope and by weight loss determination. Deterioration of E-type glass fibres was observed at 50° and 60°C on exposure to aqueous gypsum binder extract which is directly related to the durability of gypsum binder composites. It is concluded that gypsum binder composites should be used under 50°C.

Résumé

L’effet de la fibre de verre de type E sur la force et la durabilité des matériaux liants à base de gypse a été étudié sous différentes conditions climatiques et par des méthodes accélérées. Après 50 cycles de mouillage et séchage à 60°C, une déposition irrégulière de liants à base de gypse a été dévouverte à la surface des fibres de verre. La durabilité des fibres de verre (borosilicate) de type E utilisées afin de renforcer les matériaux liants à base de gypse a été examinée après immersion dans un extrait aqueux du liant à base de gypse à une température de 27 à 60°C. Les fibres de verre exposées ont été scannées et étudiées à l’aide d’un microscope électronique et leur perte de poids a été déterminée. Une détérioration des fibres de verre de type E a été observée à 50 et 60°C après exposition à l’extrait aqueux du liant à base de gypse, qui est directement lié à la durabilité des liants à base de gypse. En conclusion, les composites liants à base de gypse doivent être utilisés à une température inférieure à 50°C.

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Authors and Affiliations

  1. Central Building Research Institute, Roorkee, India

    M. Singh & M. Garg

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  1. M. Singh
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  2. M. Garg
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Singh, M., Garg, M. Fibre reinforced gypsum binder composite, its microstructure and durability. Mat. Struct. 33, 525–528 (2000). https://doi.org/10.1007/BF02480530

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  • DOI: https://doi.org/10.1007/BF02480530

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