Publication

Abstract : This research explores the incorporation of plastic aggregates into foam concrete to enhance thermal insulation while maintaining structural performance. A protein-based foaming agent with a foam-to-water ratio of 1:30 and a curing pressure of 4.5 kg/cm2 achieves a target density of 1200–1300 kg/m3. Plastic aggregates replace fine aggregates on a volumetric basis, and their impact on compressive strength is analyzed using 70 mm cubic specimens. Mechanical properties, including compressive, flexural, and splitting tensile strength, are evaluated along with thermal insulation and sound absorption. Thermal performance is further assessed through numerical modeling in COMSOL Multiphysics. The findings reveal that the optimal incorporation of plastic aggregates results in a compressive strength of 3–5 MPa, making the material suitable for non-load-bearing applications. Compared to conventional foam concrete, the modified mix offers reduced weight and improved thermal efficiency. This study highlights the potential of plastic waste in sustainable construction, contributing to energy-efficient and environmentally responsible building materials