Evaluation of new methods to determine position, size and cover of reinforcements in concrete

  • Geymayer, Helmuth, (Co-Investigator (CoI))
  • Skumautz, Josef Richard, (Co-Investigator (CoI))

Project: Research project

Project Details

Description

After discussing different standards regulating the requirements for positioning, size and cover of reinforcements in concrete structures (state of the art), the various nondestructive test methods presently used to determine the size, position and cover in reinforced concrete structures are described and particualr emphasis is laid on magnetic measuring methods.
Two modern measuring sytemes were selected for detailed performance testing in the laboratory and on site. Both are based on magnetic measuring procedures, i.e. the Profometer 4 from Proceq and the Ferroscan System FS 10 from Hilti. A test program to investigate the effect of different influences such as distance, diameter and type of reinforcement, age and composition of concrete, multilayer reinforcement etc. was carried out and the repeatability and reproduceability of the measurements were determined.
Laboratory investigations were followed by practical field applications and the advantages and disavantages of both measuring devices were compared and possibilities for further improvements were suggested.
StatusFinished
Effective start/end date1/01/9731/01/99