Study on Utilization of Waste Plywood Dust as Partial Replacement of Sand in HCB Production

摘要

River sand is large scale depletion of resources and costly due to transportation. Thus in this research, study was carried out to assess the feasibility of waste plywood dust which is easily located in Dire Dawa university as a sand replacement material in hollow concrete block production. Laboratory based investigation was conducted by replacing sand with waste of plywood dust in proportions of 0% (control), 5%, 10% and 15% of sand and compressive strength behavior and density test of replaced waste plywood dust studied in comparison to controlled hollow concrete block. As a result, the replacement of fine aggregate with certain waste of plywood dust made the hollow concrete blocks lighter in weight and the compressive strength of waste plywood dust 5% replacement range satisfy the minimum compressive strength set by Ethiopian standard of HCB for class.