Interrelation of Hardness, Modulus of Elasticity, and Porosity in Various Gypsum Systems

Abstract

The interrelation of hardness, modulus of elasticity, and porosity was investigated in four gypsum systems. Results suggest that intergrowth and interlocking of crystals significantly affect mechanical behavior, at least hardness and modulus of elasticity, E. In addition, both properties are related to porosity, p. This relation can be described empirically by the exponential expression E = E o exp (— p).