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Paving blocks are a composition of building materials made from a mixture of cement, water, and aggregates in a certain ratio. This study uses PP plastic as a substitute for cement in Paving blocks. The purpose of this study is to determine the compressive strength characteristics of various Paving block shapes by utilizing 50% Polypropylene (PP) plastic as a substitute for cement, and to identify obstacles in making Paving blocks. Paving blocks are produced at the Civil Engineering Laboratory of Balikpapan University, South Balikpapan District, Balikpapan City, East Kalimantan. This study involved variations in a mixture of PP plastic and sand with the following ratio: 50% PP plastic: 50% sand. This test was also conducted at the Civil Engineering Laboratory of Balikpapan University. The results of this study indicate that the highest compressive strength occurs in the hexagon shape of a mixture of 50% PP plastic: 50% sand, reaching 16 MPa. From all tests for block, diamond, and hexagon shapes, it can be seen that the optimal shape of this test is the hexagon shape. [ABSTRACT FROM AUTHOR]