USE OF NONDESTRUCTIVE TESTING IN EVALUATING COMPOSITE PAVEMENTS

This paper describes two projects that were conducted in the Detroit Metropolitan area, in which nondestructive testing (NDT) using a Falling Weight Deflectometer (FWD) was used to evaluate the portland cement concrete (PCC) slabs in composite pavements. The first project described is the Nine Mile Road project in the City of Oak Park. The second project is the Military Road project in Dearborn. Nondestructive test data was analyzed to determine the strength of the PCC pavement and the extent of repairs that were needed in the PCC pavement. This information was used to decide on the rehabilitation strategy for these projects. However, this paper will not cover the determination of rehabilitation strategies for these projects. This paper will describe the evaluation of the Nine Mile Road project in detail. The nondestructive data obtained for this project was analyzed by three different methods and the results from these methods were compared.