Abstract
Whitetopping refers to a thin Portland cement concrete (PCC) overlay on top of an existing deteriorated hot mix asphalt (HMA) pavement. When the PCC overlay slab thickness is between 5.1 and 10.2 cm, it is commonly referred to as ultra-thin whitetopping (UTW). In this study, the field performance of three in-service UTW sections, on US167, US65, and US90 in Louisiana were evaluated by means of pavement management system (PMS) data. The field performance survey results indicated that the cracking and patch distresses were few for these three UTW sections, which shows a good potential for UTW as an alternate rehabilitation technique for HMA pavement. The pavement condition was fair, good, and fair for US167, US65, and US90 after 13.5, 9.4 and 10.2 years of service, respectively, based on the Louisiana Department of Transportation and Development (LADOTD) PMS criterion for the national highway system. The fair pavement condition for US167 and US90 was mainly due to the relatively high international roughness index (IRI) and faulting values.
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