United States Department of Transportation
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Evaluation of MIT-SCAN-T2 for thickness quality control for PCC and HMA pavements : research project capsule.
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2013-04-01
[PDF-158.12 KB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
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Abstract:Thickness is currently a pay item for portland cement concrete (PCC) pavements
and a quality control item for both PCC and hot mix asphalt (HMA) pavements.
A change in pavement thickness of 0.5 in. can result in a reduction of multiple
years of service. Current thickness measurements are performed by destructively
coring the fi nished pavement and measuring the thickness of the core. This
is frequently performed at the end of the project construction and only fi ve
representative samples are collected for each lot. Today, multiple nondestructive
pavement evaluation tools are available and the accuracy of such
devices has signifi cantly increased in recent years. Non-destructive thickness
measurements will allow the Department a more effi cient and eff ective method
of maintaining pavement quality without damaging the pavement.
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