Durability of Paving Asphalt. Part I. A Study of the Durability and 'Setting' Properties of Paving Grade Asphalts Manufactured in the United States

摘要

The authors present comprehensive information on the properties of asphalt cements that are associated with essential engineering requirements. Data are included for a series of penetration grades of asphalt cements representing nationwide production in 1954-1955 and a special series of asphalt cements graded by viscosity at 140F also representing nationwide sources. Data are reported to show the rheological properties of the original asphalt and the changes in these properties as a result of weathering by the Shot abrasion test and measurements of viscosity, shear susceptibility and microductility. The authors classify the asphalts into 5 groups, depending upon the changes in the properties induced by weathering.