Non-Burnt Ground Oyster Shell Waste Interlocking Block

Abstract

This research aims to utilize ground oyster shell waste (OSW) to replace ordinary Portland cement (OPC) in interlocking blocks. OSW was used to replace OPC at 0, 10, 20, 30, 40 and 50 wt% of binder (CT, 10OSW, 20OSW, 30OSW, 40OSW and 50OSW) in interlocking blocks. The ratio of binder (OPC and OSW) to lateritic soil was 1:6 %wt. The properties of interlocking blocks such as compressive strength at 28, 90 days and water absorption capacity at 28 days were investigated. The result showed that at the age of 28 days CT interlocking blocks had compressive strength and water absorption capacity about 6.3 MPa and 79 kg/m³, respectively. At the same age, the interlocking blocks 10OSW, 20OSW, 30OSW, 40OSW and 50OSW had compressive strength about 6.3, 5.6, 5.0, 4.9, 4.8 and 4.5 MPa, respectively, while, the water absorption capacity of interlocking blocks was 79, 84, 91, 121, 148 and 155 kg/m³, respectively. At the later age of 90 days, CT interlocking blocks had compressive strength of about 8.4 MPa, while, the interlocking blocks 10OSW, 20OSW, 30OSW, 40OSW and 50OSW had compressive strength about 7.4, 6.5, 6.0, 5.9 and 5.6 MPa or 88, 77, 71, 70 and 67% of CT interlocking blocks, respectively.