The recycling technique of asphalt pavement materials has been used in the past decade, however, unsolved problems still exist such as rutting or instability. The slow reaction of the softening agents or the new binders or both may be responsible for this phenomenon. The viscosity of the binder in the cold-recycled pavement materials mixed with emulsified asphalts is experimentally analyzed by evaluating certain rheological characteristics of the mixture using the creep test at three temperatures. The properties of the recycled mixture are determined at both early and accelerated long-term aging and the results are compared with the properties of virgin materials. Master creep curves are developed using the time-temperature superposition technique. The creep behavior of the recycled asphalt mixture used in this study does not support the hypothesis of the long-term reaction between the emulsified asphalt and the reclaimed materials. In addition, the bulk specific gravity and the retained moisture in the compacted recycled mixture were evaluated at various ages.
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