UTILIZATION OF USED TIRES AND LDPE (LOW-DENSITY POLYETHYLENE) PLASTIC WASTE AS BASIC MATERIALS FOR CONCRETE BRICK

Tires and LDPE plastic wastes are wastes that are non-biodegradable and require further processing to decompose. If it is not processed, it will pollute the environment and disrupt the life of various organisms. Tires and LDPE plastic waste can, however, be used as a mixture for making concrete bricks that contribute best in building infrastructure development by applying the principle of recycling. The addition of a mixture of used tire waste and LDPE plastic waste is useful for improving the physical properties and pavement content of concrete bricks and preventing the depletion of natural resources, achieving an Eco-Friendly program and making the cost of concrete bricks relatively cheaper. Concrete bricks are made with a mixture of used tire waste and LDPE plastic waste with 6 samples of different compositions. The quality of concrete brick is seen from three aspects, namely density, porosity and water absorption. The best quality of concrete bricks was obtained in sample 6 with a composition of 750 grams of used tire powder, 750 grams of LDPE plastic waste, 500 grams of coarse aggregate, 200 grams of cement and 750 ml of oil to obtain a density of 1129.252/1280, 864 kg/m³, 0.5% porosity, 0.434 % water absorption. The results showed that the addition of a mixture of used tire waste and LDPE plastic waste resulted in better quality concrete bricks achieved by increasing the density of concrete bricks and reducing the porosity and water absorption values produced