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| dc.contributor.author | BETELEHEM, TEFERA WORKU | |
| dc.date.accessioned | 2022-11-11T07:03:42Z | |
| dc.date.available | 2022-11-11T07:03:42Z | |
| dc.date.issued | 2022-08 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/14351 | |
| dc.description.abstract | The main objective is to investigate the utilization of waste polyethylene bags for the manufacturing of non-load bearing Hollow Concrete Blocks (HCB) partially replacing the sand volume and analyzing its effect on the compressive strength, density and water absorption of the block. Using waste polyethylene bags as part of a construction material can be an effective solution to the plastic pollution and also help reduce the need of aggregate mining from the environment. The research experiment was conducted by preparing hollow concrete block samples that are prepared by replacing the sand volume (0%, 10%, 20%, 30% and 40 %) with shredded waste polyethylene bags. These replacement percentages are considered to find the possibility of attaining higher diversion of PE wastes to the HCB manufacturing. Results showed a decrease in the compressive strength and density of the HCB with the increase in the amount of shredded polyethylene. The decrease in the density of the blocks is mainly due to the light weight nature of the plastic when compared to the other aggregates. The compressive strength of the blocks up to 40% replacement of shredded polyethylene bags was high compared to the standard compressive strength requirements for a non-load bearing blocks, while the highest value being obtained at 10%; this is due to the prevention and obstruction of micro fractures by the PE by obstructing its propagations and could also be due to the increased bending strength of the plastic converting the shear stress to tensile stress unlike the sand material. However, the water absorption of the HCB increased with increase in the amount of PE. Due to the coarser nature of the shredded polyethylene bags there was a reduction on the packing efficiency of the mortar mix leading to higher pore formation and increased water absorption. The manufacturing cost of the blocks with PE infusion also increased as the percentage of PE replacement increased, this is due to the high cost of recycled PE which was obtained from private recycling company. Generally, results showed that it is viable to use shredded waste polyethylene bags as partial replacement to sand in the manufacturing of non-load bearing HCBs. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | CHEMICAL AND FOOD ENIGINEERING | en_US |
| dc.title | Waste Polyethylene Bags as Partial Replacement of Sand for Hollow Concrete Blocks Manufacturing | en_US |
| dc.type | Thesis | en_US |
