A Study of Physical Factors Affecting the Durability of Asphaltic Pavement

摘要

The report is a summary of the results obtained, as of the reporting date, in a continuing study of the factors affecting in-service asphalt hardening and pavement durability. Among the factors considered are traffic density, mixture composition, aggregate type and gradation, pavement density and air voids, and asphalt consistency and chemical composition as determined by the Rostler method of analysis. Pavement durability is evaluated by periodic inspection. Asphalt hardening is evaluated principally by changes in composition, penetration, viscosity and ductility. The wearing courses in three pavement groups are studied. (BPR Abstract).