Field and laboratory permeability of asphalt concrete pavements

摘要

Hot mix asphalt pavements that have been poorly designed, compacted, and (or) constructed have higher chances of experiencing moisture-related damage. This research evaluates the interrelationship between field-laboratory permeability and other mechanical and physical pavement characteristics. Eight sites in Eastern Ontario were selected for evaluating the pavement's field permeability and core extraction. Laboratory specimens of the same mixes studied in the field were prepared using the Superpave gyratory compactor (SGC). The relative density (RD), lab permeability, and indirect tensile strength (IDT) tests were performed on the field-recovered cores and SGC specimens. Permeability, RD, and IDT were found to be related such that as RD and (or) IDT decreases, the permeability increases exponentially. The strength of these relationships varied for the three test settings (SGC, field-recovered cores, and field measurements). The coefficients of field permeability and laboratory permeability using field-recovered cores were statistically different, with a fair relationship between these two test settings.