Performance-Related Specifications for Asphaltic Binders in Surface Preservation Treatments

摘要

Although the properties of asphaltic binders are crucial to the performance of surface preservation treatments, the binders often are selected based on availability and other factors not necessarily related to performance—this sometimes leads to stripping and raveling or other distress. Performance-related specifications can provide guidance on long-term quality and can help users select the proper asphaltic binder for a specific application. North Carolina State University has received a $500,000, 30-month contract (National Cooperative Highway Research Program Project 9-50, FY 2011) to develop performance-related specifications for asphaltic binders used in preservation treatments for large sections of roadway—chip seals, microsurfacjng, and slurry seals, for example. Research also will evaluate binder tests and will identify and develop performance tests.