Investigation on Sisal Fibre Concrete with Waste Foundry Sand as Partial Replacement of Fine Aggregate

The growing demand for sustainable building materials has led to exploring ecological alternatives to traditional concrete components. This study studies the mechanical properties and sustainability of reinforced concrete of sisal fibers incorporating waste foundry sand (WFS) in partial replacement of fine aggregates. Known for its natural strength, Sisal fibers increase the elasticity and flexible properties of concrete, while WFS from the metal industry provides an effective solution for waste disposal and resource preservation. In this study, class M30 concrete was prepared with different proportions of WFS (10%, 20%, 30%, 40%), replacing the fine aggregates and 1 % by volume of cement sisal fibers are added. Experimental tests were conducted to assess compression resistance, flexural strength, and tension resistance. The results show that inclusion of WFS improves the properties of concrete resistance to optimal exchange levels, while sisal fibers increase crack resistance and the ability to absorb energy. In addition to 20% of WFS replacements, there is a decline in productivity due to poor performance and increased vacuum content. This study concludes that the combination of Sisal and WFS offers a promising alternative for sustainable concrete production, contributing to environmental preservation and reducing construction costs.