The impact-echo method is based on monitoring the periodic arrival of reflected stress waves generated by a small mechanical impact. Unlike traditional ultrasonic pulse velocity testers that require access to both faces of a member and it is not possible to determine the depth to anomalies,   Mirador requires access to only one face and is able to obtain information on the depth of  internal flaws or the thickness of a solid member. The Echolyst software for data acquisition and 2D/3D visualization makes the impact-echo technique more friendly and easier to interpret.   

Impact-Echo test.

• Measure the thickness of pavements, asphalt overlays, plate-like concrete elements like slabs or walls, etc.
• Detect the presence and depth of voids and honeycombing
• Detect voids below slabs-on-ground
• Evaluate the quality of grout injection in post-tensioning cable ducts or joints for precast elements
• Integrity of a membrane below an asphalt overlay protecting structural concrete
• Delamination surveys of bridge decks, piers, cooling towers, chimneystacks, etc.
• Detect debonding of overlays and patches
• Detect ASR damage and freezing-and-thawing damage
• Measure the depth of surface-opening cracks
• Estimate early-age strength development (with proper correlation)

Impact-Echo test.

• Data Acquisition System: 
  • 2 channels, 4 MB/channel 
  • 8 bits resolution, 50 MHz bandwidth 
  • -5V to 5V Input Voltage Range
  • USB interface

• Dry contact, high sensitivity, piezoelectric handheld transducers 
• Equipped with Echolyst software that allows:
  • real-time waveform display while testing
  • create 2-D and 3-D visual representations 
  • look at reflecting interface on different cutting planes
  • audio assisted prompts to speed up data acquisition
  • superimpose test results on real image of test location
  • report generation

• Accuracy (assuming a constant P-wave speed):
  • Thickness measurement, direct calibration: ± 2%
  • Thickness measurement by surface P-wave speed measurement: ± 3%
  • Depth of surface-opening cracks: ± 4%

• Operating conditions: Temperature: -10 to 50 °C,  RH ≤ 95 %

Mirador -3000 Kit

Includes:

Mirador-5000 Kit

Includes:

To be ordered separately

• Technical Data Sheet

• ECH-TDS Echolyst

• Publications

• ASTM C1383, “Test Method for Measuring the P-Wave Speed and the Thickness of Concrete Plates Using the Impact-Echo Method”