Analyzing of Coatings on Steel - Reinforced Concrete Elements by Mobile NMR

Archives of civil engineering

Prof. Dr. J. OrlowskyIng., habil., Technische Universität Dortmund, Department of Building Materials, August-Schmidt-Str. 8, 44227 Dortmund, GermanyEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Ing., habil., Technische Universität Dortmund, Department of Building Materials, August-Schmidt-Str. 8, 44227 Dortmund, Germany

关键词: Keywords: Coating;    Concrete;    Non-destructive Testing;    NMR;    Layer Thickness;   

DOI  :  10.1515/ace-2015-0052

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

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.

【 授权许可】

Unknown