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Nuclear magnetic resonance as a tool for the characterization of concrete in different stages on its development

 
: Wolter, B.; Dobmann, G.

Schickert, G.; Wiggenhauser, H. ; British Institute of Nondestructive Testing; Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. -DGZfP-, Berlin; Bundesanstalt für Materialforschung und -prüfung -BAM-, Berlin:
Non-Destructive Testing in Civil Engineering 1995. Vol.1
Berlin, 1995 (DGZfP-Berichtsbände 48.1)
S.181-188
International Symposium on Non-Destructive Testing in Civil Engineering <1995, Berlin>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
Beton; concrete; Feuchteabsorption; Feuchtigkeit; Hydratation; moisture; moisture absorption; nuclear magnetic resonance; pore space; Porenraum

Abstract
Nuclear magnetic resonance (NMR) offers a variety of possiblities for the non-destructive characterisation of mortar or concrete. In each stage of its "life", the material properties of concrete are close connected with moisture. At the earliest stage of concrete development, NMR-methods are suitable to evaluate the degree and the velocity of hydration of cement pastes and quantitatively distinguish different molecular binding states of water. On cemented concrete, NMR-measurement results show the possibility to determine the amount of adsorbed moisture with high accuracy of the water/cement ratio of concrete. In addition there are first results which indicate the possibility to evaluate the pore size distributionand the permeability in porous materials with NMR.

: http://publica.fraunhofer.de/dokumente/PX-26614.html