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Technical University of Munich

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
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