Non-destructive Testing

Head:

Prof. Dr.-Ing. habil. Dipl.-Geophys. Christian Große

The following investigations are offered:

• Quality control of construction products during production, e.g. fresh concrete
• Non-destructive investigation and characterization of materials, building materials and structural components
• Inspection of structural components and structures using non-destructive methods, in particular the following:
  • Detection of damage (defects, cracks, delamination etc.)
  • Determination of structural component dimensions
  • Reinforcement location and cover measurement
  • Determination of moisture in structural components, long-term monitoring of structures (e.g. bridges, halls, or historical structures) and plants
• Long-term monitoring of structures (e.g. bridges, halls, or historical structures) and plants

The following equipment is available:

• Acoustic emission analysis
  • Detection of damage (cracks)
  • Localisation (1D, 2D, 3D), automatic localisation
  • Visualisation of damage evolution in time and space
  • Analysis of damage parameters (fracture size, position of fracture surface, type of fracture)
  • Analyse of friction noise and delamination
  • Investigation of the bonding between the matrix and reinforcement
• Ultrasonic technique
  • Reflection of ultrasound
  • Transmission of ultrasound, e.g. to determine elastic properties (Young’s modulus, porosity etc.)
  • Localisation of defects (gravel honeycomb, voids)
• Impact-echo technique
  • Localisation of defects (gravel honeycomb, voids)
  • Detection of cracks and crack depth / width determination
• Modal and natural frequency analysis
  • Determination of modal parameters (resonant frequency, logarithmic decrement etc.)
  • Determination of elastic properties (Young’s modulus etc.)
  • Detection of cracks
  • Analyse of bonding
• Moisture measurement
  • Electronic measurement of moisture in building
  • Electronic measurement of moisture in wood
• Seismic testing / seismology
  • Vibration (tremor) investigations
  • Natural frequency analysis
• Infrared thermography
  • High-precision temperature measurement and location of heat / moisture leaks
  • Location of hidden construction structures, e.g. wooden framework under plaster in half-timbered houses
  • Location of delaminations
• Georadar
  • Location of reinforcement (untensioned reinforcement, sheaths, prestressing steel)
  • Location of defects
  • Detection of moist regions
• Eddy current test
  • Detection of cracks and crack depth determination in metallic materials