Analysis of Mechanical Properties and Permeability of Sand Moulding by Using Eggshell in Sand Casting

This study aimed to analyse the usage of Eggshell as mixture material of bentonite in metal casting process which used dried sand moulding. Eggshell variations in this study were 4%, 7%, 10% eggshell, and additional 3% of bentonite on each sample. This study used pre-experimental method and included to One-Shot Case Study model. The highest strength was found on the sample 3 ES 10%. Tensile strength of dried sand moulding reach up to 0.09 kg/cm 2 , the compressive strength of dried sand moulding reached up to 3.11 kg/cm 2 , and the shear strength of dried sand moulding reached up to 1.13 kg/cm 2 . Based on the test result indicated that permeability of sand moulding by heat treatment at 110oC for 60 minutes at sample of 3 ES 10% was at 178.3 ml / min.