Traditionally, pavements have been designed using empirical relationships with equations derived from observed pavement failures. Recently, the design of pavements using mechanistic approaches based on known material properties of pavement materials has become an industry expectation. Specifically, a program, AASHTOWares Pavement ME, incorporates both mechanistic and empirical understandings of pavements in order to design and predict long-term pavement distresses. This thesis aims to develop a concrete materials database for mechanical properties specific to Georgias rigid pavements. This database includes laboratory tested values of compressive strength, Youngs modulus, modulus of rupture, and ultimate shrinkage. Twelve Georgia Department of Transportation (GDOT) approved concrete mixtures using Georgia specific concrete materials were batched, tested, and analyzed for these properties. Additionally, this thesis investigates which of these properties are most critical in rigid pavement design through sensitivity analysis conducted with Pavement ME at Input Levels 1, 2, and 3. Ultimately, this study provides design recommendations for critical mechanical properties as well as guidance for which Input Level to use for the design of Georgia rigid pavements.