This study was conducted to test the compressive strength of concrete hollow blocks prepared from three treatments with upcycled plastics as partial replacement to choker aggregates, find out which proportion of concrete hollow blocks with upcycled plastics was the most acceptable in terms of compressive strength, and ascertain the cost analysis of concrete hollow blocks. The study used Randomized Complete Block Design (RCBD) replicated three times composed of the three proportions with upcycled plastics and the control group cured in 28 days. The Universal Testing Machine (UTM) was used to test the compressive strength. Results of the study showed that the control group had a highest compressive strength. Treatments B and C had equal compressive strength. Treatment C had the lowest compressive strength of 2.00 MPa. The results of all treatments passed the minimum compressive strength of 1.50 MPa. In addition, the masses of the concrete hollow blocks in all treatments, including the control group were lightweight. As to cost, results indicated that the concrete hollow blocks prepared from 0% upcycled plastics obtained the lowest price in terms of cost analysis. With these results, the use of concrete blocks using upcycled plastics as construction materials in projects is highly forwarded. Concrete and manufacturing industries may also venture into the production of concrete blocks using upcycled plastics to encourage backyard economy, recycle wastes, and help in the conservation of the environment.
