Integrated Asphaltic Mixture Analysis System for the Design of Heavy Duty Highways in the U.S

摘要

The report describes the development of an Integrated Asphaltic Mixture Analysis System for the Design of Heavy Duty Highways in the U.S. addressing the two most common forms of pavement distress, fatigue and rutting. The environment of the U.S. has been sub-divided into five groups. For these groups two design strategies with fatigue and rutting as the major concerns have been developed. Simple creep tests have been utilized for developing the design method with rutting as the dominant concern. Fatigue testing program (which is time-consuming and expensive process requiring specialized equipment) is eliminated through direct tension tests, while developing the design strategy with fatigue as the major concern. Finally, an effort is made to develop an integrated design method in which design asphalt contents can be made to mitigate rutting and obtain optimum fatigue performance for the design of heavy duty asphalt concrete layer.