A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modeling chemo-hygro-thermo-mechanical couplings in 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 and physical relations are briefly summarized. The mutual couplings between the hygral, thermal, chemical and mechanical processes are considered in the equations. Then, numerical methods used for solution of the model governing equations are presented. For this purpose the finite element method is applied for space discretization and the finite difference method for integration in time domain. 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 at two different temperatures.
Modeling chemo-hygro-thermo-mechanical couplings in 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 and physical relations are briefly summarized. The mutual couplings between the hygral, thermal, chemical and mechanical processes are considered in the equations. Then, numerical methods used for solution of the model governing equations are presented. For this purpose the finite element method is applied for space discretization and the finite difference method for integration in time domain. 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 at two different temperatures.
Modeling chemo-hygro-thermo-mechanical couplings in cementitious materials
Gawin, Dariusz (author) / Koniorczyk, Marcin (author) / Pesavento, Francesco (author)
2012
10 Seiten, Bilder, Tabellen, 16 Quellen
Conference paper
English
| British Library Conference Proceedings | 2003
| UB Braunschweig | 2015
| TIBKAT | 2015