Evaluation of Pavement Rehabilitation Strategies on Route 165 and Prediction Performance

Abstract

Many roads in Rhode Island are coming to their intended design life and are now considered in poor condition. Significant number of roads with severe deterioration is being rehabilitated through full depth reclamations (FDR) with various additives. FDR can rejuvenate subbase and pavement structures. Route 165 in Exeter, Rhode Island, was selected as a test road with four different treatments and a control. The road had severe pavement distresses such as alligator cracking, pot holes, shoving and raveling and was not a candidate for a resurfacing. The road had a FDR in 2013 which included a control section, three test sections with additives which consisted of calcium chloride, asphalt emulsion, and Portland cement, and a geo-grid section. Triaxial testing was performed on the subbase materials and subgrade soils before and after the FDR treatments to determine the resilient modulus. The results of the material testing were used to predict the performance of each of the test sections by using AASHTOWare Pavement ME Design software.