Since years Betontest invests in research activities to improve the application of non-destructive evaluation methods in civil engineering. This is done in cooperation with the Institut für Massivbau (concrete construction institute) of Technical University Darmstadt, Germany and Cambridge Ultrasonics - Instrumentation Innovation Ltd, England. We are focusing our research and development efforts to answer practical questions on building site. The following topics should be emphasized:
  • evaluation of cracks with respect to the tightness of secondary barriers to protect the environment from ground polluting liquids,
  • determination of the thickness of slabs and layers of structures which are accessible only from one side to answer questions concerning constructional physics,
  • measuring of the anchoring depth of dowels as an input of static computations,
  • development of image processing techniques to enhance the objectivation in ultrasonic data analysis in the sense of EN29001,
  • quantitative estimation of rebar corrosion in reinforced concrete utilizing X-ray, ultrasound and acoustic emission technique and
  • enhancement of signal analysis in the processing of ultrasonic data collected for non-destructive examination of concrete.
Please note our publications which are partly published on the world wide web.

decision according to a threshold decision according to a threshold

Objectivation of amplitude-evaluation in ultrasonic data analysis
Amplitude statistics are helpful in the analysis of ultrasonic data collected for the inspection of concrete structures. By means of the invention of a threshold T where every amplitude exceeding the threshold is regarded as relevant we can define the probabilities of false alarm, correct detection and miss. One aim of our research work is to keep this probabilities constant.