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Abstract

This thesis presents results from an experimental study on the dynamic modulus and fatigue testing of hot mix asphalts (HMA) commonly used in Georgia. Seventeen mixtures with varying aggregate sources, gradations, binder types, and asphalt contents were used to 1) expand the Georgia department of transportations (GDOT) material input library for dynamic modulus and 2) recommend a test method that predicts realistic strain levels and better fatigue cracking prediction for fatigue performance. The effects of HMA mixture properties on dynamic modulus testing indicate that gradation, binder type, and reclaimed asphalt pavement (RAP) greatly affected moduli. To evaluate fatigue performance of HMA mixtures, three different fatigue tests were used in this study: Cyclic direct tension test based on simplified viscoelastic continuum damage (S-VECD) model, Semicircle Bend Test (SCB), and modified overlay test (OT). The findings from these tests suggest gradation and binder type significantly impact pavement performance

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