An experimentation made on plastic and demolished waste in concrete mix

Abstract

In the current experimental investigation, plastic waste is used as a partial substitute for fine aggregate to the extent of 10%, and coarse aggregate is partially replaced by destroyed material to the extent of 0%, 10%, 20%, 30%, 40%, and 50% of the total amount of coarse aggregate in the experiment. The standard mix for M25 grade concrete has been developed, with a water-to-cement ratio of 0.45. This proportion is employed in the concrete manufacturing process. During the course of this experiment, sixteen distinct combinations are created. The impact moulds used are 150 mm × 75 mm and the cubes used are 150 mm × 150 mm. The specimens used include cubes with dimensions of 1550 mm × 150 mm and cubes with dimensions of 300 mm × 300 mm. The density of concrete may be varied between 2500 and 2100 kg/m3 by replacing plastic garbage with sand at a constant percentage and modifying the replacement percentage of coarse aggregate with damaged material at a variable percentage. It was found that adding more recycled aggregate to fresh concrete made it less workable. According to the results, replacing natural sand and coarse aggregate in normal concrete with plastic waste and recycled aggregate increases compressive strength (fck) and split tensile strength (ft) by up to 10%, but then decreases when the quantity of recycled waste is increased. According to the findings of the experiment, fine aggregate replaced with 10% plastic waste and coarse aggregate replaced with 10% recycled aggregate resulted in excellent quality for new concrete as well as attaining the conventional concrete's goal mean strength.