This research investigates non-destructive testing (NDT) techniques for the quality assurance of portland cement concrete pavements and structures. Responses were collected from a survey distributed amongst AASHTO Committee of Materials and Pavements (CoMP) members regarding their use of NDT technologies. Relevant literature was reviewed to determine the fundamental capabilities and limitations of NDT techniques and comparisons were drawn between commercially-available devices. Finally, a series of validation tests were performed to confirm that specific NDT devices perform as expected. From the information gathered, recommendations are made regarding the implementation of NDT technologies for the enforcement of concrete performance-based specifications.M.S