Hot Modulus of Rupture Model of Refractory Materials

Jiří Hamáček, Jan Urbánek, Jan Macháček

Department of Glass and Ceramics, Institute of Chemical Technology, Prague 16628/Czech Republic

Revision

Volume 6, Issue 4, Pages 83 - 88

Abstract

A new model of the temperature dependence of the hot modulus of rupture (HMOR) has been proposed. This HMOR model presumes a viscoelastic behavior of a refractory material at the point of rupture. In the simplest case, a refractory material is considered to be a Maxwellian solid for which the viscosity parameter of a dash-pot is described by a simple Arrhenian relationship and the elastic parameter of a spring is independent of temperature. Experimental data points were interlaid by the model curve and the excellent agreement has been found in spite of the fact that only three adjustable parameters are involved in the HMOR model.

Keywords

hot modulus of rupture, refractory castables, model

References

[1] Banerjee S. in: Refractories handbook. Ed. Schacht C.A. New York 2004, 1–10 [2] Hamácˇek, J.; et al.: On the high temperature bending strength of castables. Ceramics-Silikaty 56 (2012) 198–203 [3] EN 993-7, Determination of modulus of rupture at elevated temperatures [4] Carbone, G.; Persson, B.N.J.: Hot cracks in rubber: Origin of the giant toughness of rubberlike materials. Eur. Phys. J. E 17 (2005) 261 [5] Frontline Systems, Inc.: http://www.frontsys.com [6] Machácˇek, J.; et al.: Modeling of hot modulus of rupture of castables at very high temperature Ceramics-Silikáty, submitted [7] Ye, F.; Rigaud, M.; X. Liu; X. Zhong: Rheology of alumina-based graphite-containing castables. Ceram. Int. 30 (2004) 801

Copyright

Göller Verlag GmbH