MRI validation of FEM models to describe moisture induced spalling of concrete

S.J.F. Erich, A.B.M. Overbeek, van, A.H.J.M. Vervuurt, G.H.A. Heijden, van der, L. Pel, H.P. Huinink

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

Fire safety of buildings and structures is an important issue, and has a great impact on human life and economy. One of the processes negatively affecting the strength of a concrete building or structure during fire is spalling. Many exarnples exist in which spalling of concrete during fire has caused severe darnage to structures, such as during the fires in the Mont Blanc and Channel Tunnel. Especially newly developed types of concrete such as HPC and SCC, have shown to be sensitive to spalling, harnpering the application of these new concrete types. To reduce risks and building costs, the processes behind spalling need to be understood. Increasing our knowledge allows us to predict and take effective and cost friendly preventive measures. One of the mechanisms that drives spalling of concrete, is the heating of the moisture present inside concrete. When concrete is heated water will evaporate, which results in a high gas pressure inside the pores of the concrete. In recent years much research has been perforrned on the processes behind spalling. Using this knowledge, a Finite Element Model (FEM) describing the moisture transport processes in heated concrete has been developed. However, the validity of all current models (including our own) is unknown because of debatable input parameters and lack of experirnental techniques to follow the transport process in situ. In cooperation with the Eindhoven University of Technology moisture transport in heated concrete can now be investigated using a home built dedicated ID Magnetic Resonance Imaging (MRI) setup. Using the results of the MRI experiments the validity of our FEM model is being assessed.

Originele taal-2Engels
TitelProceedings of the International FIB Symposium 2008 - Tailor Made Concrete Structures
SubtitelNew Solutions for our Society
RedacteurenJ.C. Walraven, D. Stoelhorst
UitgeverijCRC Press
Pagina's193-193
Aantal pagina's1
ISBN van geprinte versie978-0-415-47535-8
StatusGepubliceerd - 2008
Evenement2008 International FIB Symposium on Tailor Made Concrete Structures: New Solutions for our Society - Amsterdam, Nederland
Duur: 19 mei 200821 mei 2008

Congres

Congres2008 International FIB Symposium on Tailor Made Concrete Structures: New Solutions for our Society
LandNederland
StadAmsterdam
Periode19/05/0821/05/08

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