ABSTRACT

This study presents the results of the experimental and mechanical assessment and investigation of periwinkle shell (pws) for use as reinforcement additive in grindstone. Locally sourced periwinkle shell was sourced and washed thoroughly to remove impurities. Further impurities were removed by hand picking. After which the periwinkle shell was sundried for 2 months to make it dry and free from moisture. The periwinkle shell was then crushed with a periwinkle grinding machine into fine particle. The periwinkle was sieved to get a particle size of 1.40mm. The sand and gravel used in this work was also sieved to get particle size (1.40mm). The cement used in this work is Ordinary Portland cement (opc) which is grey in colour. The cement, water, sand, grounded periwinkle and aggregate was mixed according to design proportion. Eight proportion consisting of Sample A (.34% of water,7.63 of sand,36.69% of cement,32.45% of fine aggregate andl4.49% of periwinkle), Sample B (7.63% of water,9.13% of sand, 36.69% of cement, 32.45% of fine aggregate and 7.43% of eriwinkle shell) ETC. were produced and their mechanical properties(hardness, compressive strength, tensile strength and water absorption) were evaluated. The results showed that hardness, and compressive increased in Sample C irrespective of the replacement with periwinkle shell had the optimal result.