The purpose of this research is to investigate the dynamic shear strength, moduli and damping properties of hot-mix asphalt (HMA) mixtures. Unconsolidated undrained (UU) triaxial compression testing method with pore pressure measurements under temperature controlled environmental conditions will be utilized for testing of partially saturated HMA specimens at achievable saturations. A dynamic loading apparatus capable of applying pulsating repeated loads at different frequencies will be employed indetermining the dynamic parameters with respect to number of cycles to cause failure. The decrease in peak foad as the number of cycles increases will be observed as it is reflected by progressive flattening of the stress-strain curves. The Superpave~(TM) Gyratory Compactor will be utilized in preparation of the partially saturated test specimens. The analysis will be based on the effective stress values at achievable saturations. The study will investigate, under repeated loads, the change in the material properties of the pavement mixture with respect to the mixture's asphalt cement content and mixture design parameters at different testing temperatures.
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