Innovative Use of the Glass and Seashell waste Powders as Partial Cement Replacements in Eco-Flowable Sand Concrete

This study aims to investigate the use of seashell waste powder (SWP) and glass waste powder (GWP) as partial cement substitutes in Flowable Sand Concrete (FSC), with substitution ratios ranging from 0 to 20%, focusing on their impact on slump flow, compressive, and tensile strengths. The findings suggest that incorporating these powders into the concrete improves its workability and yields favorable mechanical properties. Specifically, with a 10% substitution of cement with SWP and GWP, the mix showed an increase of 3.57% in slump flow, an enhancement in compressive strength by 9.22% at 7 days and 8.93% at 28 days, and an improvement in tensile strength by 9.84% at 7 days and 3.72% at 28 days, compared to the control mix. Using these waste materials reduces costs and CO₂ emissions, aiding sustainability.