Abstract:

Asphalt is considered a valuable construction material because of its strong, adhesive, and durable characteristics. Asphalt binder is a viscoelastic material and has a different behavior under different climate condition and traffic loadings and speed. Dynamic Modulus of Asphalt Mixtures E* is an important factor in pavement design therefore Highway Authority in Turkey has developed a mathematical model for the determination of E* based on research conducted for this purpose. During this study, it was found that this model is not sufficient for the determination of E* under different climate conditions (temperatures) and traffic speeds. An experimental program has been conducted for testing different typical virgin and modifies asphalt binders in Turkey. The results have been analyzed using Mechanistic Empirical Pavement Design Method MEPDM as the new model will be part of this new design method as recommended by Highway Authority in Turkey. A new approach for the determination of E* in Turkey has been found and recommended.

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