Pulverized Glass and Plastic Bottles as an Alternative for Lightweight Non-Load Bearing Concrete Blocks

Abstract

This study explores using pulverized glass and shredded plastic bottles as partial replacements for fine aggregates in lightweight, non-load bearing concrete blocks. With growing glass and plastic waste posing environmental risks, the research evaluates sustainable alternatives for the construction sector. Concrete mixes with varying replacement levels (10%– 90%, 30%–70%) were tested following ASTM and BS standards for strength, density, and water absorption. Results show that up to 30% waste replacement reduces unit weight by 25%, maintains acceptable compressive strength (optimal at 20%), and improves water resistance. The study confirms the technical and environmental feasibility of incorporating such waste in concrete, promoting sustainable construction and circular economy practices.