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Compact Laser Shearography System for Crack Detection

Award Information
Agency: Department of Transportation
Branch: N/A
Contract: DTRT5708C10001
Agency Tracking Number: DTRT57-08-C-10001
Amount: $714,456.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: 05-FH1
Solicitation Number: N/A
Solicitation Year: 2005
Award Year: 2008
Award Start Date (Proposal Award Date): 2007-10-31
Award End Date (Contract End Date): 2009-10-30
Small Business Information
1055 West Germantown Pike
Norristown, PA 19043-
United States
DUNS: 093728483
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 John Newman
 (610) 631-5043
Business Contact
 John Newman
Title: President
Phone: (610) 631-5043
Research Institution

Laser Technology Inc. (LTI) proposes a Phase II SBIR research project to further develop a Compact Shearography System, Analysis Method and Software for micro-crack detection in concrete. There is an urgent need to detect and characterize fine cracks in concrete that form because of various damage mechanisms including alkali-silicate reaction, delayed ettringite formation or frost damage. Fine shrinkage cracks do not pose a structural problem in the static sense, their presence can promote deterioration processes that over time can lead to failure. They allow water to penetrate, which can lead to ASR and DEF, the corrosion of steel reinforcements and fatigue cracks. Work performed by the researchers herein demonstrated shearography can detect non-visible cracks in concrete. Under a Phase I SBIR, we developed and field demonstrated a prototype instrument for micro-crack detection in concrete. Under the Phase II proposed work plan, LTI will further develop the equipment hardware and software for crack analysis and test a number of concrete samples. Shearography will be used to evaluate the HIPERPAV II concrete shrinkage crack model using a modified VTT Finnish early age shrinkage test. We will conduct literature search of crack detection and measurement methods and compare performance with the developed shearography system.

* Information listed above is at the time of submission. *

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