ASPHALT CONCRETE PATCHING MATERIAL EVALUATION INTERIM REPORT

There are a great number of proprietary pothole patching products available on the market that claim to be the "perfect" fix to repair asphalt concrete highway potholes. These products are difficult to evaluate. Without actually placing the products in a test deck, it is difficult to determine the quality of a product by looking at the product literature. The objective of this study was to evaluate new patching materials to determine their viability. Issues such as uniformity, availability, handling, stockpiling impacts, compatibility with common roadway materials, and field performance were investigated. A literature review of laboratory, field, and pothole patching material ranking was performed. Both a laboratory and field verification component were included. The laboratory component included a series of material tests with pass-fail criteria. The field portion of the study included manufactured potholes and natural potholes. All fieldwork performed was done with standard maintenance procedures. Following placement, pothole test patches were monitored and will continue to be monitored for an additional year.