DOWEL BAR RETROFIT: I-90, KACHESS RIVER TO YAKIMA RIVER. POST-CONSTRUCTION REPORT

This report documents the rehabilitation of a faulted Portland cement concrete (PCC) pavement with epoxy coated dowel bars. The dowel bars were installed parallel with centerline at each joint to reestablish panel to panel interlock. The construction project also included the trial installation of tied PCC shoulders as a means of stabilizing the panels. Diamond grinding was also included in the contract to bring the retrofit pavement back to a smooth longitudinal profile. Early performance results indicate that the retrofit dowel bars are performing better than the tied shoulders with regard to preventing the reoccurrence of faulting.