Evaluating the Effects of Concrete Pavement Curling and Warping on Ride Quality

Curling and warping are two phenomena that occur as a result of differences within concrete pavement slabs. Curling is caused by temperature variation between opposing surfaces of slabs; warping is caused by moisture variation between opposing surfaces of the slabs. In 2012, a 9-inch concrete pavement (Class P) was placed on on State Highway 34 near Greeley on pavement that underwent full depth reclamation. The eastbound lanes had smoothness problems related to slab curl, while the westbound lanes did not. This result provides a side-by-side comparison of a curling pavement and non-curling pavement that have the same design. Using the eastbound and westbound lanes as a comparison, this study will evaluate the construction conditions that lead to curling and warping.