Chapter 1. Plaster of Paris Used in the Sanitary Ware Industry

  1. John B. Wachtman Jr.
  1. A. Mirhabibi1,
  2. Z. Sadeghian1 and
  3. E. Mani2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314050.ch1

A Collection of Papers Presented at the 94th Annual Meeting and the 1992 Fall Meeting of the Materials & Equipment/Whitewares Manufacturing: Ceramic Engineering and Science Proceedings, Volume 14, Issue 1/2

A Collection of Papers Presented at the 94th Annual Meeting and the 1992 Fall Meeting of the Materials & Equipment/Whitewares Manufacturing: Ceramic Engineering and Science Proceedings, Volume 14, Issue 1/2

How to Cite

Mirhabibi, A., Sadeghian, Z. and Mani, E. (1993) Plaster of Paris Used in the Sanitary Ware Industry, in A Collection of Papers Presented at the 94th Annual Meeting and the 1992 Fall Meeting of the Materials & Equipment/Whitewares Manufacturing: Ceramic Engineering and Science Proceedings, Volume 14, Issue 1/2 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314050.ch1

Author Information

  1. 1

    Ceramic Department Iran University of Science and Technology Tehran, Iran

  2. 2

    Isfahan Refractory Research Center Isfahan, Iran

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375235

Online ISBN: 9780470314050

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Keywords:

  • water to plaster ratio;
  • modulus of rupture;
  • gypsum;
  • analysis of dry plaster;
  • plaster molds

Summary

In this work, the effect of particle size and water-to-plaster ratio (w/p) in a specific range on bending stress of plaster samples is studied. It was generally believed that an increase in w/p should lead to a decrease in modulus of rupture (MOR), but our experiences prove opposite within the specific range w/p = 70:100–86:100. In this specific range, the local increase of MOR is observed in the MOR-w/p curve. The results show that the presence of air bubbles has a drastic effect on this behavior. In addition, a decrease in particle size within a specific range could also decrease the MOR.