“Liquefaction” of asphalt caused by cyclic loading, as a potential reason of extreme rutting

ABSTRACT: The frictional resistance of compacted asphalt might diminish as a result of cyclic anisotropic loading, if the pores of the asphalt are sufficiently saturated with binder material. The authors introduce the term of liquefaction, describe the mode of adding the binder material in order to avoid the reduction of effective stresses and the resulting extreme rutting. A material model, known from soil mechanics, is introduced, which is suitable for describing the mechanical behaviour of high temperature asphalt.