The dominant layered pavement structure requires aggregate, the higher construction level needs a lot of new materials and to minimize the problem of natural damage due to rock mining, one alternative is substituting concrete waste for coarse aggregate. The concrete waste that will be used is the quality of K-225 as a coarse aggregate substitution material and asphalt modified by polymer (plastic) type PET (Polyethylene Terephthalate) which is mineral bottle. This study aims to determine the characteristics of asphalt concrete base course (AC-BC) mix using waste concrete as coarse aggregate substitution and 6% PET as asphalt substitution. The total specimens are 75 specimens with variations of waste concrete as coarse aggregate substitution are 5% and 15%. The use of waste concrete as coarse aggregate substitution and 6% PET as asphalt substitution according to the specifications of Bina Marga 2018 Revision 2 (2020). The results in this study the best concrete waste, namely at 5% variation at lower 5.68% asphalt content with a stability is 1168.70 kg, flow is 3.63 mm, density is 2.44 t/m³, VIM (Void in mix) is 3.86%, VMA (Void in mineral aggregate) is 17.29%, VFA (Void filled by asphalt) is 77.67% and MQ (Marshall quotient) is 323.98 kg/mm. The durability for the best mix composition is 91.71% which means the mix has durability according to specifications.

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