Influence of Calcined CaSO₄ Whisker and Dispersion Method on Bending Strength of Gypsum Board

Abstract:

The hydration ability of CaSO₄ whiskers calcined under the condition of 475-500 °C for 10-60 min was researched by X-ray diffraction and scanning electron microscope. The optimal calcined CaSO₄ whiskers were added into building gypsum and the bending strength of gypsum board was influenced by different dispersion methods. The results show that the whiskers calcined under 475 °C for 30 min begin to hydrate and the aspect ratio of whisker calcined under 500 °C and 525 °C has no changed for 1 h of hydration time. The bending strength value of gypsum board with ultrasonic dispersed whisker is lower than that of gypsum board with directly mixed whisker.

• Periodical: Applied Mechanics and Materials (Volumes 638-640)
• Pages: 1350-1353
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.638-640.1350
• Online since: September 2014
• Authors: Chang Chen*, Yu Bin Wang, Wei Zhang, Xiao Yu Xue, Lei Liu, Yi Song
• Keywords: Calcium Sulfate Whisker, Gypsum Board, Microstructure

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