Influences on layer thickness measurements of concrete coatings by mobile NMR on steel-reinforced concrete constructions

Author(s): J. Orlowsky, M. Raupach
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 252- 253
Total Pages: 2
Language: English

Abstract: 
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 this important parameter directly 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. This has been done in the frame of a wide test program at the ibac, RWTH Aachen University. Content of the present paper are the description, results and the analysis of these investigations. 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 lead to identical results.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00