Plastic waste generates numerous environmental problems because its decomposition is time-consuming. Recently, the use of plastic waste as a substitute material in concrete has been known to reduce the quality of concrete due to its slippery surface. This study assesses the applicability of artificial aggregate results in plastic waste, namely crushed plastic. In addition, the use of commercial plastic aggregate pellets as the substitution material is also evaluated. The quality of concrete is prepared for K250 or 20.75 MPa in 28 days of compressive strength tests. Several compositions of crushed and pellets of plastic are substituted for coarse aggregate in concrete mix design, and its impact on compressive and flexural strength is evaluated. The results of this study show that the substitution of plastic as coarse aggregate reduces the compressive strength of concrete with the strength of the control sample of 28.20 MPa. Using 10–20% artificial crushed plastic fulfills the targeted strength of 20.75 MPa, with a maximum strength of 23.63 MPa achieved in crushed plastic of 10%. A significant improvement in flexural strength was achieved when the crushed plastic of 10–20 was added. This study concluded that using artificial crushed plastic has considerable potential to be an alternative way to reduce plastic waste and develop green concrete.