Concrete Innovation Using Tree Branch Waste as Coarse Aggregate and Stone Ash as Fine Aggregate

Concrete is a widely used construction material. This research investigates the effect of adding tree branch waste and stone dust as substitutes for coarse and fine aggregates on concrete’s physical and mechanical properties. The results show that these additives significantly impact weight and compressive strength. The weight comparison for 10% additive concrete was 7.28 kg at 7 and 14 days, while for 20% additive concrete, it was 7.02 kg at 7 days and 7.06 kg at 14 days. Normal concrete weighed 7.50 kg at 7 days and 7.66 kg at 14 days. The planned compressive strength (K250 or F’c: 20 MPa) for 28 days was met, with samples containing 10% and 20% additives exceeding the planned strength. However, increased use of these materials led to a reduction in compressive strength. Therefore, the addition of tree branches and stone dust should be limited to 10%, as the highest compressive strength was obtained at this percentage. This research suggests that using tree branch waste and stone dust as partial substitutes for aggregates can reduce concrete’s weight while maintaining its strength. Limiting the addition to 10% is recommended for optimal results.