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Key Words: Plastic Flow Rutting,DS(Dynamic Stabilit),Modified Asphalt,Number of Heaby vehicle


Evaluation of Plastic Flow Rutting Resistance of Dense-Graded Asphalt Pavements on Expressways

Akio IIDA. Shigeru SHIMENO, Masahiro KANEDA, Masakazu SATOU

An analysis of rutting depth on expressways was conducted and it was made clear that the Dynamic Stability (DS) of more than 800 should be a target value to plastic flow rutting on expressways with daily heavy traffic volume of less than 5000 vehicles in one direction and the DS of more than 2000 to restrain plastic flow rutting on expressways with daily heavy trafic volume ofless than or equal to 5000 vehicles. Tests to determine the property of modified asphalt cements was conducted with the Accelerated Pavement Testing Machine,and following properties were found to be desired to have enough resistance to the plastic flow rutting softening point of 60Å$Bqá(B,viscosity at 60Å$Bqá(B of more lO00paÅEs,though more date are required.