Distributes strains in fibre-reinforced concrete mixed with the ground

The subject of the project was to investigate the structural behaviour of a new material: fibre-reinforced concrete mixed with the ground. Its possible applications include slurry walls and other geotechnical structures. After experiences in the research field, six reinforced beams were now prepared for mechanical tests in laboratory conditions. Each beam was equipped with 4 EpsilonSensors and 4 EpsilonRebars to monitor strains and crack development.

DFOS Sensors Installed: EpsilonSensor and EpsilonRebar

Project challenges

How to apply non-invasive diagnostics in demanding historic structures?
How to get precise measurement data to detect local damage and imperfection?
How to measure detailed strain profiles over the entire height of the brick masonry wall?

Benefits of using the DFOS monitoring system

Distributed measurements of unregular strains over the entire length
Simultaneous analysis of both compression and tension zone
Direct local damage and cracks detection, even in a very weak material
Reliable data for the safety assessment of new material introduced to industry

Results of using the DFOS monitoring system

The mechanical tests were performed in the Laboratory of the Cracow University of Technology. Thanks to thousands of sensing points inside the element, it was possible to analyse its behaviour in a very detailed way, including detecting all the cracks in the tension zone.

Moreover, one of the goals was to analyse the quality of the results obtained by sensors with different stiffness: EpsilonSensors (negligible elastic modulus not influencing the specimen) and EpsilonRebars (high stiffness locally strengthening the specimen).

Technical specifications

28 800 measurement points
288 m of sensing path
24 x ER, 24 x ES
short-term (laboratory)

Example results

Recomendations (optional)

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John Doe

Project partner

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