C7.1 - Characterization of carbon fiber-based strain gauge made by embroidery technology for integration in concrete

AMA Conferences 2017
2017-05-30 - 2017-06-01
Nürnberg, Germany
Proceedings Sensor 2017
C7 - Textile-based Sensors
M. Heinrich, A. Bauer, L. Kroll - Technische Universität Chemnitz (Germany)
401 - 404


Based on approx. 40,000 national bridges of which 39% obtained in the condition monitoring satisfactory to sufficient according to the report of BMVBS 2013, the demand for an online condition monitoring for the efficient and economic sustainable maintenance and repair measures is there [1]. Thus, cost reductions of up to 50% are possible with the usage of condition monitoring systems [2]. Plus, the foundation of wind turbines in off-shore areas as well as for supporting concrete elements in
high-rise buildings demands for the usage of those systems.

The in the paper presented carbon fiber-based strain gauges aim for the development of a novel condition monitoring system for the integration in supporting concrete elements that take or rather evaluate the dynamic load and thus optimize the maintenance and repair measure intervals. The sensor comprises of a carbon fiber roving that is fixed on a textile base by means of embroidery technology. In the subsequent etching process the base is washed out and the remaining embroidery element is impregnated with epoxy resin. This way an open sensor structure is formed that is resistant to alkaline influences and provides an optimal integration into coarse concrete. First investigations on electro-mechanical and thermal behavior show a great potential for the condition rating of supporting
concrete elements.