Compressive Strength of Lightweight Concrete with the Use of Waste Polyethylene Terephthalate Bottles

This research presents the development of lightweight aggregate concrete using fine aggregate that is manufactured from waste polyethylene terephthalate (WPET) bottles. WPET with the average diameter of 1-3 mm was used with four different contents of 5%, 10%, 15% and 20% by weight. In comparison to the control concrete, the 90-day WPET concrete compressive strength showed that the use of WPET particles up to maximum replacement level of 10% produces concrete with acceptable strength. However, the ultimate strength of concrete was gained at 5% of cement replacement by weight. It is concluded that the replacement of cement with 5% WPET improves the compressive strength of concrete compared to the control concrete