Evaluation of Overlay Tester Test Procedure to Identify Fatigue-Cracking Prone Asphalt Mixtures

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CAIT project no.: CAIT-UTC-NC57

Fiscal Year: 2017/2018

Status: Final

Principal investigator(s): Thomas Bennert, Ph.D.

Performing organization(s): Rutgers CAIT

Managing organization: Rutgers CAIT

In cooperation with: New Jersey Department of Transportation, Bureau of Materials
Partner project manager: Paul Hanczaryk

In cooperation with: Port Authority of New York/New Jersey
Partner project manager: Darius Pezeshki

Supported by: USDOT OST-R

UTC, grant, or agreement no.: DTRT13-G-UTC28


The purpose of this study is to evaluate the Overlay Tester using field cores from a recently completed FHWA accelerated loading facility (ALF) fatigue cracking study. The study comprised of 10 different lanes, each produced to the same target volumetrics, but with varied recycled asphalt contents, base asphalt binder grades, and the addition of warm mix asphalt technologies. Each lane was trafficked until fatigue cracking failure, and therefore, they provide an excellent means to compare field and laboratory performance. In addition, FHWA did not include the Overlay Tester in any of their testing plans; thus, additional testing using the Overlay Tester would be first for the test facility’s materials.