Development of WPC Spacer Blocks using Waste Plastic

This study develops Wood-Plastic Composite Spacer Blocks (WPC-SB) using waste plastic and sawdust as sustainable alternatives to conventional concrete spacers. Samples were fabricated in varying ratios (e.g., 1:25 and 1:30 wood-to-plastic) and tested for water absorption (IS-3495:1992) and compressive strength (IS-14858:2000). The 1:30 sawdust-to-plastic ratio showed optimal performance, with low water absorption (4.11–5.26%) and strength up to (1.11–1.24 kN). Environmental tests confirmed eco-friendly, with minimal impact to the water quality (pH 8.67, turbidity 3.4 NTU, Dissolved Oxygen 23.4mg/lit). WPC-SB combines waste recycling, durability, and compliance with construction standards, offering a practical solution for sustainable infrastructure. Keywords: Wood-Plastic Composite (WPC), Spacer blocks, Wood-Plastic Composite Spacer Blocks (WPC-SB), Mix Aggregate (MA), Waste Plastic (WP), Sawdust (S)