A large number of infrastructural concrete buildings are protected
against aggressive environments by coating systems. The functionality of
these coating systems is mainly affected by the composition and
thickness of the individual polymeric layers. For the first time ever, a
mobile nuclear magnetic resonance (NMR) sensor allows a non-destructive
determination of these important parameters on the building site.
However, before this technique can be used on steel-reinforced concrete
elements, the potential effect of the reinforcement on the measurement,
i.e. the NMR signal, needs to be studied. The results show a shift of
the NMR profile as well as an increase of the signals amplitude in the
case of the reinforced samples, while calculating the thickness of
concrete coating leading to identical results.