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Aging Effects on Mechanical Characteristics of Multi-Layer Asphalt Structure

This chapter focuses on Asphalt ages during construction, transportation, application phases and service life, as well. Exposure of environmental conditions such as traffic and climate is one of the prominent reasons aging in asphalt. The most common mechanism of aging is the degradation in the chemical structure of the binder by oxidation. Asphalt aging could cause several serious issues on the pavement such as stiffening, stripping that accelerates fatigue cracking and different moisture-induced problems such as raveling and potholes. Therefore, various additives are used as modifiers to improve the mechan- ical properties of asphalt. The most commonly used modifiers are polymers. Styrene butadiene styrene (SBS) polymers are utilized to prevent from deteriorating against exter- nal factors during its service life and to delay its aging in asphalt pavement. In the scope of this study, it was aimed to provide the general perspectives on mechanical characteristics of multi-layer asphalt structure under the aging effects besides traffic conditions.