The asphalt QC challenge

Kristi Connor, a former student at Auburn University, prepares an asphalt sample to run a specific gravity test. Photo: National Center for Asphalt Technology.

Technicians with the Kansas DOT take an asphalt sample behind the paver.

Robert S. James, a civil engineer working in the lab at the National Center for Asphalt Technology, prepares to run a bulk specific gravity test on a sample of hot mix asphalt.

Milestone Contractors technician Dan Brown prepares to gyrate a pill specimen of hot mix asphalt in a Pine Gyratory compactor.

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