Structural, Pavement & Tunnel Systems
Click on any NDT Test Method Name to link to a more detailed page on the method
NDT Method Applicable On Test For  Freedom
Data PC
NDE
360

Impact Echo
(IE)


Overview


NOTE: All of Olson's Concrete Thickness Gauge's are based on the IE principle
  • Beams
  • Bridge Decks
  • Columns
  • Dams
  • Pavements
  • Pipes
  • Post-Tensioned Ducts
  • Runways
  • Slabs
  • Tunnels
  • Walls
  • Cracks
  • Delaminations
  • Honeycomb
  • Thickness
  • Voids

Impact Echo Scanner (IES)

Overview

  • same as Impact Echo (IE) above
  • same as Impact Echo (IE) above

Multiple Impact Surface Waves
(MISW)


Overview
  • Asphalt
  • Base
  • Concrete
  • Rock
  • Subbase
  • Subgrade Soil
  • Layer Shear Moduli
  • Layer Poisson’s Ratio
  • Layer Thickness
  • Layer Young’s (Elastic) Moduli

Slab Impulse Response (SIR)

Overview

  • Concrete Slabs / Retaining Walls
  • Pavements
  • Pond or Pool Bottoms
  • Runways
  • Spillways
  • Tunnel Liners
  • Delaminations in Decks
  • Soft or Weak Subgrade Support
  • Voids Below Slabs
  • Voids Below Tunnel Linings

Spectral Analysis of Surface Waves
(SASW-S)


Overview
  • Asphalt
  • Concrete
  • Masonry
  • Stone
  • Wood
  • Layer Thickness
  • Material Moduli
  • Shear Wave Velocity Profiles
  • Velocity Calibration Only with CTG Model SASW arm add-on

Ultrasonic Pulse Velocity (UPV)

checkmark.gif Overview


  • Beams
  • Bridge Decks
  • Elevated Slabs
  • Shaft Tops
  • Walls
  • Cracks
  • Delaminations
  • Honeycomb
  • Velocity vs. Strength Correlation with Cores
  • Voids
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