United States Department of Transportation
i
Phase II NCAT test track results.
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2006-12-01
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[PDF-3.49 MB]
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Abstract:There is a need to be able to quickly test materials and mixtures in-place, under real traffic.
There have been many developments during the last few years that need verification prior to
adopting. One such development is the new proposed mechanistic pavement design procedure.
Another is the development of proposed performance tests that need verification. It will take at
least 15 to 20 years to verify these procedures on existing highways. However, accelerated
loading facilities such as the National Center for Asphalt Technology (NCAT) Test Track can
accomplish these verification studies safely in two to three years. This can be done at reduced
cost and without adversely affecting the driving public.
The NCAT test track was built in 2000 and has now been in use for five years. Experimental
sections on the 1.7 mile Pavement Test Track are cooperatively funded by a number of state DOTs
and the Federal Highway Administration (FHWA), with operation and research managed by NCAT.
State DOTs that have sponsored work at the track include: Alabama, Florida, Georgia, Indiana,
Missouri, Mississippi, North Carolina, Oklahoma, South Carolina, and Tennessee. In 2000, forty-six
different test sections were installed at the facility, each at a length of 200 feet. Materials used
locally by the section sponsors were transported to NCAT during construction to maximize the
applicability of results to the sponsors. In 2003, many of these sections were rebuilt and traffic again initiated.
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