Hardness, elasticity modulus and flexion strength of dry set plaster
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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.
KeywordsPolymer Mechanical Property Porosity Brittleness Elasticity Modulus
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- 1.V. M. Röbler and I. Odler, Zement Kalk Gips 2 (1989) 96.Google Scholar
- 2.Lafarge Coppee Recherche, private communication.Google Scholar
- 4.K. K. Phani, Amer. Ceram. Bull 65 (1986) 1584.Google Scholar
- 6.P. Coquard, Thesis, Université d'Aix-Marseille III, France (1992).Google Scholar
- 8.S. Timoshenko, in “Résistance des Matériaux”, Vol. I (Dunod, Paris, 1972) pp. 89–164.Google Scholar
- 14.A. Carpenteri, Nota Technica No. 73, ISCB (University of Bologna, 1983).Google Scholar
- 15.E. Orowan, in “Fundamentals of Brittle Behavior in Metals”, MIT Symposium on Fatigue and Fracture of Metals, June 1950 edited by E. Orowan (Wiley, New York), 1952) p. 154.Google Scholar
- 18.P. Haasen, in “Physical Metallurgy”, 2nd Edn edited by P. Haasen (Cambridge University Press, 1986) p. 62.Google Scholar
- 19.W. Weibull, J. Appl. Rech. 18 (1951) 293.Google Scholar