Journal of Materials Science

, Volume 29, Issue 17, pp 4611–4617 | Cite as

Hardness, elasticity modulus and flexion strength of dry set plaster

  • P. Coquard
  • R. Boistelle
  • L. Amathieu
  • P. Barriac


In this study the mechanical properties of dry set plasters are of interest. Shore C hardness of different plasters is given as a function of porosity for porosities ranging from 41 to 65 vol%. The data, and data collected from literature, show that Young's modulus follows an empirical power law for porosities ranging from 26 to 70 vol%. Flexion strengths were measured on samples of different sizes and porosities (41.4–65 vol%). As they are size dependent, strength variation cannot be correlated to the sole porosity. Finally, analysing the results with Weibull's theory led to the proposition of a brittleness scale for plasters. Brittleness increases with decreasing porosity.


Polymer Mechanical Property Porosity Brittleness Elasticity Modulus 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • P. Coquard
    • 1
  • R. Boistelle
    • 1
  • L. Amathieu
    • 2
  • P. Barriac
    • 2
  1. 1.Centre de Recherche sur les Mécanismes de la Croissance, CristallineCNRSMarseille cedex 09France
  2. 2.Lafarge-Coppée RechercheLa Verpillière cedexFrance

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