The motive to conduct this study was initiated from repeated observations of excessive wastes ofrnasphalt surface and road maintenance techniques in Addis Ababa. The study was focused onrndetermining the materials property of recycled granular materials containing different percentagesrnof recycled asphalt pavement (RAP) to use as an unbound base course material. rnLaboratory tests and field implementation were carried out to determine the physical andrnmechanical properties of virgin aggregates and various aggregate-RAP blends at differentrnpercentages. The results were used to evaluate the strength of granular layer for pavementrnconstruction through proper compaction and control of RAP usage. The tests were also conductedrnto check the standards and requirements specified by the Addis Ababa City Roads Authorityrn(AACRA) and Ethiopian Roads Authority (ERA) using the procedures of the AmericanrnAssociation of State Highway and Transportation Officials (AASHTO) testing manual. rnThe sieve analysis test results showed that gradation of material RAP 1 and RAP 2 are better thanrnthe virgin aggregate gradation currently used by AACRA. Both standard and modified proctorrncompaction tests were carried out to evaluate the effect of variable compaction; the results alsornshowed that the dry density of materials resulted from standard compaction is lower than the resultrnin modified compaction of the same material. The laboratory CBR results showed that the blendsrnwith high content of virgin aggregate achieved high bearing capacities. Low CBR values wasrnachieved by neat RAP materials of 100% RAP 1 and 100% RAP 2 materials. The blends containingrn75% VA in all material types resulted in higher CBR values. RAP materials implemented in fieldrnas an unbound base course material for trial did not show any of early pavement distresses in onernyear service time. rnBeyond determining materials property the study review and asses current material production andrnroad maintenance activity to consider major economic and environmental benefits emanated fromrnusing the recycled materials instead of virgin aggregate productions. In this regard, the economicrnbenefits by using RAPs resulted in 50% saving of virgin aggregate production costs annually. Inrnaddition to economic benefits, reuse of RAPs may reduce road construction wastes generated fromrnroad maintenance and rehabilitation activity by 23% which is needless for the city, Addis Ababa.