Modelling of hydro-thermo-chemo-mechanical phenomena in building materials

Bulletin of the Polish Academy of Sciences. Technical Sciences

D. GawinCorresponding authorDepartment of Building Physics and Building Materials, Lodz University of Technology, 6 Politechniki Ave., 90-924 Lodz, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  M. KoniorczykDepartment of Building Physics and Building Materials, Lodz University of Technology, 6 Politechniki Ave., 90-924 Lodz, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  F. PesaventoDepartment of Civil, Architectural and Environmental Engineering, University of Padova, Via Marzolo 9, 35131 Padova, ItalyOther articles by this author:De Gruyter OnlineGoogle Scholar² 

[1] Department of Building Physics and Building Materials, Lodz University of Technology, 6 Politechniki Ave., 90-924 Lodz, Poland;Department of Civil, Architectural and Environmental Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy

关键词: Keywords : building materials;    chemical degradation;    hydro-thermal processes;    mechanics of multi-phase porous media;    numerical solution;   

DOI  :  10.2478/bpasts-2013-0004

学科分类：工程和技术（综合）

来源: Polska Akademia Nauk * Centrum Upowszechniania Nauki / Polish Academy of Sciences, Center for the Advancement of Science

【 摘 要 】

A general approach to modelling chemical degradation processes in building materials, due to combined action of variable hydrothermal, chemical and mechanical loads, is presented. Mechanics of multiphase porous media and damage mechanics are applied for this purpose, and kinetics of degradation 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. Then, the model governing equations are numerically solved with the finite element method. Three examples of the model application for analyzing degradation processes of building materials are presented and discussed. The first one deals with capillary suction of the salt solution by two different building materials, the second one with the salt crystallization during drying of a brick wall, and the third one concerns calcium leaching from a concrete wall due to the chemical attack of pure water under pressure gradient at two different temperatures

【 授权许可】

Unknown