Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hygrothermal-Chemical Couplings in Degradation of Cementitious Materials
A general approach to modeling chemical degradation processes in cementitious materials, due to combined action of variable hygral, thermal, chemical and mechanical loads, is presented. Mechanics of multiphase porous media and damage mechanics are applied for this purpose, and kinetics of chemical processes is described with evolution equations based on thermodynamics of chemical reactions. The mass-, energy- and momentum balances, as well as the evolution equations, constitutive relationships are briefly summarized. The mutual couplings between the hygral, thermal, chemical and mechanical processes are considered in the equations. Two examples of the model application for analyzing chemo-hygro-thermo-mechanical processes in cement based materials are presented and discussed. The first one deals with the salt crystallization during drying of a concrete wall, and the second one concerns calcium leaching from a concrete wall due to chemical attack of pure water in two different thermal conditions: with and without temperature gradient.
Hygrothermal-Chemical Couplings in Degradation of Cementitious Materials
A general approach to modeling chemical degradation processes in cementitious materials, due to combined action of variable hygral, thermal, chemical and mechanical loads, is presented. Mechanics of multiphase porous media and damage mechanics are applied for this purpose, and kinetics of chemical processes is described with evolution equations based on thermodynamics of chemical reactions. The mass-, energy- and momentum balances, as well as the evolution equations, constitutive relationships are briefly summarized. The mutual couplings between the hygral, thermal, chemical and mechanical processes are considered in the equations. Two examples of the model application for analyzing chemo-hygro-thermo-mechanical processes in cement based materials are presented and discussed. The first one deals with the salt crystallization during drying of a concrete wall, and the second one concerns calcium leaching from a concrete wall due to chemical attack of pure water in two different thermal conditions: with and without temperature gradient.
Hygrothermal-Chemical Couplings in Degradation of Cementitious Materials
Gawin, D. (Autor:in) / Koniorczyk, M. (Autor:in) / Pesavento, F. (Autor:in)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 2003-2012
18.06.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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