Investigation of the physical-mechanical properties and durability of high-strength concrete with recycled PET as a partial replacement for fine aggregates

In this study, PET plastic waste, which is a type of polymer commonly used in the manufacture bottles, has been incorporated into concrete by partially replacing natural fine aggregate. An experimental study was conducted casting and testing 90 cylinders 54 cubes. A mixture designed aggregate substituted with waste (PW) at ratio 0%, 25%, 50%, various w/c ratios .40, .45, .55. Physical, mechanical, durability properties were assessed. The downside test results show degradation each following characteristics: slump, compressive strength, splitting tensile ultrasonic pulse velocity, water absorption, porosity. these characteristics increased increase volume (PA) ratio. While positive side showed that PA ratio, fresh dry densities decreased further, using 50% PET, density became below 2000 kg/m 3 . Therefore, it classified as lightweight concrete. Moreover, fracture changed from brittle to more ductile compared control Also, thermal conductivity significantly (11%–47%), less than .71 W/mK, accordingly, bearing insulator.