Impact Echo Based Concrete Bridge Deck Testing

  Tech Brief 

Impact Echo Based Sonic Surface Scanner (S3)

As a result of research funding from the National Cooperative Highway Research Program, Olson Engineering developed the Sonic Surface Scanner (S3) based on the Impact Echo (IE) test method.

Olson's S3 is the most technically advanced system for structural condition assessment to date. No other system on the market tests for both top and bottom concrete deck delaminations, while performing over 20,000 impact echo tests in 1 hour.

For decks with additional problems such as freeze-thaw cracking or alkali-silica reaction cracking damage, Spectral Analysis of Surface Waves (SASW) tests can be performed on bridge decks at the same time as Impact Echo tests to evaluate complete bridge deck integrity and provide many benefits over traditional chain dragging of bare concrete decks including:

  • Highly accurate mapping of top deck steel delaminations to 1 foot or less
  • Detects bottom deck rebar delamination in areas without top delamination
  • Thickness profiling of sound deck areas
  • Complete deck integrity evaluations with combined IE-SASW scanning
  • Highly accurate bridge damage maps for repair bids

Applicable On: Concrete Decks (ex: parking decks, bridge decks, industrial building floors, etc)

Test For: Top and Bottom Concrete Delaminations