POWDERED EGG AND SNAIL SHELLS AS CEMENT ALTERNATIVE IN MAKING PAVERS

Abstract

This study explored the use of powdered snail shell and eggshell as partial cement alternatives in paver production. The main goal was to evaluate how these alternative binders affect slump, compressive strength, and flexural strength, and to compare their performance against traditional cement-based pavers. Results from the slump test showed that mixtures with pure eggshell had the highest workability, indicating better flow characteristics. Compressive strength tests over 3, 8, and 15 days revealed that while pavers made with 100% eggshell or snail shell had very low strength, partial replacements slightly improved this property. Eggshell demonstrated pozzolanic activity, contributing positively to compressive strength, whereas snail shell showed limited effectiveness. Overall, pavers with alternative binders had lower compressive and flexural strengths compared to those made entirely of cement. The study found that cement-based pavers remain superior in durability and strength, while eggshell mixtures offer better workability but insufficient strength. Recommendations include adjusting the cement-to-eggshell or snail shell ratios to optimize performance, extending curing periods to better assess strength development, and exploring additives to enhance mixture properties. Furthermore, additional testing on durability, environmental resistance, split tensile strength, and water absorption is suggested for a comprehensive evaluation of alternative binders. In summary, powdered eggshell and snail shell show promise as sustainable cement substitutes, but significant further research is necessary to improve their effectiveness and ensure they meet industry standards for paver production.