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SUMMARY:Modelling degradation processes of cement-based materials by means
  of mechanics of multi-phase porous media
DTSTART:20170224T121500
DTEND:20170224T130000
DTSTAMP:20260408T172835Z
UID:3d492a961a3b64910b32d655f10216a43fab13da8db07b4a7ec3dd20
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dariusz Gawin\nFull Professor at Łódź University of T
 echnology\, Poland\nBio: Prof. Gawin is ordinary professor at the Łódź 
 University of Technology\, Poland where he is the vice-rector of the Unive
 rsity for Innovations and Development\, and the Head of the Department of 
 Building Physics and Building Materials. He got his PhD (with honours) in 
 Civil Engineering at the Łódź University of Technology (Poland)\, Facul
 ty of Civil Engineering and Architecture in 1990\; and a Master (with hono
 urs) in Mechanical Engineering at the Gdańsk University of Technology (Po
 land)\, Institute of Naval Architecture in 1981. His current research inte
 rests are related to the durability of building materials\, the numerical 
 modelling of the mechanics of multiphase porous materials as well as susta
 inable buildings\, energy efficiency and the energy auditing of a building
 .\n \nCivil Engineering Seminar Series Spring 2017\n\nModelling degradati
 on processes of cement-based materials by means of mechanics of multi-phas
 e porous media\n \nProf. Dariusz Gawin\nFull Professor at Łódź Univers
 ity of Technology\, Poland\n\n\nAbstract: A general approach to modelling 
 various degradation processes in cementitious materials\, due to combined 
 action of variable hygral\, thermal\, chemical and mechanical loads\, will
  be presented. Mechanics of multiphase porous media and damage mechanics a
 re applied for this purpose. Kinetics of physico-chemical processes\, like
  for example: cement hydration\, salt crystallization/dissolution\, calciu
 m leaching\, Alkali Silica Reaction (ASR)\, and water freezing/thawing\, i
 s described with evolution equations based on thermodynamics of chemical r
 eactions. The mass-\, energy- and momentum balances\, the evolution equati
 ons describing chemical reactions and deterioration processes\, as well as
  the constitutive and physical relations will be presented. The mutual cou
 plings between the chemical\, hygral\, thermal and mechanical processes wi
 ll be discussed\, both from the viewpoint of physicochemical mechanisms an
 d mathematical modelling. Numerical methods used for solution of the model
  governing equations will be presented. For this purpose the finite elemen
 t method is applied for space discretization and the finite difference met
 hod for integration in the time domain.  \nSeveral examples of the model 
 application for analysing transient chemo-hygro-thermo-mechanical processe
 s in cementitious materials will be solved and discussed. The first exampl
 e deals with concreting and maturing of massive structure. The second exam
 ple concerns calcium leaching from a concrete wall due to chemical attack 
 of pure water\, exposed to gradients of both temperature and pressure. The
  third one describes cracking of concrete element\, caused by development 
 of expanding products of ASR. The fourth example concerns the salt crystal
 lization during drying of a wall made of concrete/ceramic brick\, causing 
 degradation of a surface layer due to development of crystallization press
 ure. The last example concerns freezing and thawing of a wet concrete wall
  in variable temperature and relative humidity\, causing frost damage.\n 
 \n 
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 &lang=en&dim_lang=en&tree_groups=centres_nevralgiques%2Cacces%2Cmobilite_r
 eduite%2Censeignement%2Ccommerces_et_services%2Cvehicules%2Cdeveloppem
STATUS:CONFIRMED
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