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Faculty of Civil Engineering, University of Rijeka , Rijeka , Croatia
Faculty of Civil Engineering, University of Rijeka , Rijeka , Croatia
Concrete is widely used, but its production consumes natural resources and generates significant CO₂ emissions. Modern construction requires structural stability and durability while reducing environmental impact through sustainable materials. This study investigated the use of PVC sawdust as a partial replacement for fine aggregate and metakaolin as a partial replacement for cement in concrete mixtures. The addition of PVC sawdust significantly reduced workability (slump decrease of 96.7 %) and compressive strength (30.2 %), while slightly increasing ductility. Concrete with 15 % PVC sawdust is not suitable for load-bearing elements but may be used in lightweight and non-structural components, supporting waste utilization and sustainable construction.
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