Polyethylene Terephthalate Waste Utilisation for Production of Low Thermal Conductivity Cement Sand Bricks

There is a tremendous increase in plastic waste that negatively impacts the environment due to various industrial activities. Furthermore, has non-biodegradable properties make it hard reduce its accumulation around globe. Hence, this study aims investigate possibility of incorporating Polyethylene terephthalate (PET) as partial replacement material sand improve thermal insulation cement brick by looking at findings low conductivity value. The uses PET bottle been cut into small flakes and grind using granulator machine produce granules whose size not more than 5 mm, similar size. This was added other raw materials, i.e., sand. percentages vary from 2.5%, 5%, 7.5% weight. produced two types samples, control brick. All samples undergo laboratory works involving geotechnical gradation, physical, mechanical, testing. Based on results obtained, optimum proportion bricks making 5% having lowest value 0.581 W/mK meeting standard requirements 3.90 MPa > 3.45 (ASTM C129-11 for compressive strength), 2,146 kg/m3 2,000 normal weight non-loadbearing brick). Thus, can be potential bricks. Its enhance existing reduces consumption, solves problems, promotes better environmentally-friendly construction industry.