Structural Concrete Blocks with Recycled PET: Density, Absorption and Compressive Strength

Acosta-Alvarado M.; Rodriguez-Moreno A.; Alvarado C. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2025) · DOI: 10.18687/laccei2025.1.1.879

Resumen

Plastic is one of the main contributors to environmental pollution, which prompted this research aimed at evaluating the influence of adding recycled PET plastic on the density, absorption, and compressive strength of concrete blocks intended for structural use. An experimental design was employed, producing blocks with a control sample and incorporating recycled PET in proportions of 5%, 10%, and 15%. Concrete blocks with recycled PET were subjected to standard tests according to NTP 399.602:2017, including compressive strength, dry density and absorption. The results showed compressive strengths of 15.51, 13.57, and 12.57 MPa, absorption values of 73, 80, and 84 kg/m3 and densities of 2074, 2050, and 1989 kg/m3 respectively, for the different PET proportions. It is concluded that adding 5% recycled PET plastic meets the minimum requirements established by the standard, positioning it as a sustainable alternative for manufacturing concrete blocks.

Instituciones: Universidad Privada del Norte