Simulation of Freeze-Thaw Cycles

Associated people

J. Bluhm, T. Ricken (TU Dortmund), W.M. Bloßfeld

Abstract

In civil engineering, the processes of freezing and thawing of fluid and gas saturated porous media is a point of great discussion. In addition they are strongly influenced by the fluid-ice phase transition. Ice formation in porous media results from coupled heat and mass transport and is accompanied by ice expansion. In a multiphase approach, a macroscopic quadruple model consisting of the constituents solid (cement stone), liquid (freezable water), ice and gas is developed within the framework of the Theory of Porous Media (TPM). The usefulness of the model for saturated porous solids under cycling thermal loading is demonstrated by a comparison of computationally and experimentally gained data of the CIF-Test (Capillary suction, Internal damage and Freeze-Thaw Test). Beside the influence of the heat of fusion, especially, the capillary suction as well as frost suction in gas and liquid filled porous media will be studied.

References

Ricken, T & Bluhm, J. [2010], "Modeling fluid saturated porous media under frost attack", GAMM-Mitt., Vol. 33 (1), pp. 40-56.

Bluhm, J., Ricken, T., & Blossfeld, M. [2009], "Dynamic Phase Transition Border under Freezing-Thawing Load in Porous Media -- A Multiphase Description", Schroeder, J. (ed.): Report 47, Institute of Mechanics, University Duisburg-Essen, Germany.

Bluhm, J. and Ricken, T. & Blossfeld, M. [2009], "Freezing and thawing load in porous media - Experiment and Simulation", PAMM, Vol. 9, pp. 387 -388.

Bluhm, J. & Ricken, T. & Blossfeld, M. [2008], "Energetische Aspekte zum Gefrierverhalten von Wasser in porösen Strukturen", PAMM, Vol. 8, pp. 10483 - 10484.