Design Mixture of Concrete Slab Using Recycled Polyethylene and Bamboo Powder Dust as a Partial Replacement for Coarse and Fine Aggregates

Plastic bottles are one of the main reasons for land pollution in the world, wherein Philippines produces an estimated 2.7 million tons of plastic waste annually which takes a long time to decompose, alongside with the bamboo sawdust. This waste can cause detrimental pollutants that can have an impact on the environment in the near future. One such affected area by this problem is Concepcion Palasan, in Sariaya, Quezon. The study aimed to investigate the effecttiveness of recycled plastic bottles particles and bamboo sawdust as a partial alternative for fine and coarse aggregates in the concrete mixture for slab. Recycled Polyethylene (RP) plastic bottles and bamboo powder sawdust was collected. Both the compressive strength and weight classification percentage were determined by testing the concrete mixture. The percentage levels of recycled plastic bottles are composed of 1%, 3%, 5% with the ratio polyethylene to bamboo sawdust of 1:0.5 were prepared to partially replace the volume of coarse and fine aggregates respectively, which were cured for 7, 14, and 28 days before undergoing several tests, including compressive strength, density and flexural tensile strength. The samples were tested and analyzed through laboratory tests conducted at MEGA Testing Center Inc. In Lucena City. The study found that the mixture of 3% recycled polyethylene with 1.5% bamboo sawdust as partial replacement for coarse and fine aggregates achieved the highest compressive strength test compared to other mixture with an average of 3560 PSi (24.57 MPa), with a density of 2240 kg/m3 which passed the standard specification of ASTM C90, and considered as a normal weight concrete.