Field Evaluation of Surface Treatments on Existing Asphalt Pavement in National Highway

In Korea, recently, surface treatments are recommended to use in distressed pavements due to cost-effective, extension of pavement life, and improvement of surface performance such as friction and noise. In this study, microsurfacing and polymer slurry seal are selected to evaluate assessment of field application and their performance. The test section using both surface treatments were built on hot-mix asphalt (HMA) surfaced national highway at the same time and then their performance are monitored right after the construction. To evaluate the field performance of surface treatments, friction, noise, crack and IRI values are measured using noise-measuring vehicle, British pendulum tester (BPT), and pavement evaluation surveyor (PES) before and after applying surface treatments. On the basis of the field performance of surface treatments, pavement surface treated with microsurfacing and polymer slurry seal shows better fiction resistance and noise reduction compared to pavement surface without preservation treatment. It is postulated that the surface characteristics using surface treatments can be improved but long-term performance should be monitored over the service life.