The Engineering Properties and Heat Transfer of Concrete Block Mixed with Polystyrene

Abstract

Study of engineering properties and heat transfer of concrete blocks mixed with plastic waste. Polystyrene replaces sand in the ratios of 0, 5, 10, and 15 percent. The mixing ratio of cement: sand: rock dust is equal to 1: 2: 6 by weight. Water is used in the proportion of 10 percent of the total weight of the mixture. To study engineering properties and heat transfer of concrete Percent absorption value at 7 days and compressive strength of concrete blocks at 7, 14, and 28 days of incubation. Studies have shown that a ratio of 15 percent to polystyrene waste gives the best engineering properties. It has an average density value of 2,258.72 kg/m³. The average water absorption value was equal to 6.49 percent and the average compressive strength at curing ages 7, 14, and 28 were equal to 50.10, 53.16, and 53.73 kg/cm², respectively, which values ​​were by TIS 58-2017 standards, non-stick type. Bear weight 60-minute heat transfer test using a heat spotlight. T1 (heat emitting side) has an initial temperature of 35 °C. Start recording values. T2 (heat receiving side) records the temperature difference between T1-T2, with the temperature between 35-70 °C. The heat transfer test results of concrete blocks mixed with 15 percent polystyrene plastic waste had a thermal conductivity equal to 3.368 W/m·k. The thermal resistance value is 0.021 m²·k/W. and the heat transfer coefficient of the concrete block is 48.116 W/m²·k. Using polystyrene plastic waste instead of 15 percent sand results in good heat transfer values ​​and is also a guideline for managing plastic waste to be used as construction materials. that can be developed commercially in the future