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Experimental Investigation on mechanical properties of concrete by replacing fine Aggregate with quarry Dust
Basic economic principles define scarcity when demands exceed supply. Currently, nothing illustrates this principle than construction materials demand and supply in cities as urbanization is booming at a cost of displacing rural farmers. Thus, looking for alternative construction material inputs for structural concrete production is an active challenge that needs immediate action. Use of alternative materials is also a step forward to save our planet by saving wastes and going green. Based on methodology for sampling, three samples of sand and quarry dust were collected from three main sand local markets found at German Square, Gorro and Laghare. Visual inspections, impurities, workability and mechanical properties of concrete tests were conducted on sand and quarry dust samples. The index properties test reveals that sand and quarry dust used for the study qualify the aggregate requirements. From each quarry dust and sand sample mix design, six concrete cubes with 150 mm × 150 mm × 150 mm size, six cylinders with size 150mm*300mm size and six flexure/beam with 100mm*100mm*500mm size were casted using concrete mix ratio 1:2:3. For strength of 25 MPa that can be used (mostly) in moderate height building (cement: sand: quarry dust: coarse aggregates: water). To determine variation in strength as regards of the different percentage of quarry dust samples. Concrete produced from each sand and quarry dust samples with the same cement content but different coarse aggregates, and water were subjected to compressive strength, split tensile and flexural strength test at the age of 7 and 28 days. It was discovered that the higher the percentage of quarry, the higher the increment effect on the mechanical properties of concrete strength and the reduction on workability. This paper gives recommendations on means of achieving required concrete strength when using quarry dust and sand from the study area and suggest contactors, designers and other concerned parties to wash quarry dust before using.
Experimental Investigation on mechanical properties of concrete by replacing fine Aggregate with quarry Dust
Basic economic principles define scarcity when demands exceed supply. Currently, nothing illustrates this principle than construction materials demand and supply in cities as urbanization is booming at a cost of displacing rural farmers. Thus, looking for alternative construction material inputs for structural concrete production is an active challenge that needs immediate action. Use of alternative materials is also a step forward to save our planet by saving wastes and going green. Based on methodology for sampling, three samples of sand and quarry dust were collected from three main sand local markets found at German Square, Gorro and Laghare. Visual inspections, impurities, workability and mechanical properties of concrete tests were conducted on sand and quarry dust samples. The index properties test reveals that sand and quarry dust used for the study qualify the aggregate requirements. From each quarry dust and sand sample mix design, six concrete cubes with 150 mm × 150 mm × 150 mm size, six cylinders with size 150mm*300mm size and six flexure/beam with 100mm*100mm*500mm size were casted using concrete mix ratio 1:2:3. For strength of 25 MPa that can be used (mostly) in moderate height building (cement: sand: quarry dust: coarse aggregates: water). To determine variation in strength as regards of the different percentage of quarry dust samples. Concrete produced from each sand and quarry dust samples with the same cement content but different coarse aggregates, and water were subjected to compressive strength, split tensile and flexural strength test at the age of 7 and 28 days. It was discovered that the higher the percentage of quarry, the higher the increment effect on the mechanical properties of concrete strength and the reduction on workability. This paper gives recommendations on means of achieving required concrete strength when using quarry dust and sand from the study area and suggest contactors, designers and other concerned parties to wash quarry dust before using.
Experimental Investigation on mechanical properties of concrete by replacing fine Aggregate with quarry Dust
Abinet Fekede Geremew (author)
2020-03-12
doi:10.20372/nadre/19880
Theses
Electronic Resource
English
DDC:
690
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