A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Diatomaceous Earth (Brewery Silage) As Partial Replacement of Cement in Pervious Concrete
Pervious concrete is a special type of concrete with relatively high void content and high water permeability. Basically, it is leading construction material that meets the need of sustainable material for pavement construction. Using this pavement type avoids Environmental impacts, such as water pollution, water logging, climate change and urban hot islands. However, the usage of pervious concrete is limited to light weight traffic due to lower strength compares to the conventional concrete. On the other hand, increasing the demand of Portland cement concrete as a construction material increased the global warming by immersing carbon during the production. Partial replacement of cement with Diatomaceous Earth solve the aforementioned problems by enhances the mechanical properties of pervious concrete and decreasing the demand of Portland cement. It also minimizes cost and add sustainability feature by reducing landfills required to accommodate Diatomaceous Earth wastes. This study experimentally investigates brewery silage (Diatomaceous Earth) as a partial replacement of Portland cement in pervious concrete mix. Fresh and dry samples of mixtures were prepared in concrete laboratory and their respective mechanical properties were investigated through a series of tests. The investigations were performed using compressive strength, splitting tensile strength, flexural strength, permeability, hardened density and porosity tests. The experiment was designed by preparing mix considered 0 to 30% Diatomaceous Earth (DE) replacement of cement at 5% increment and tests were conducted at the ages of 7 and 28 days. Based on experimental investigation, DE has resulted an increase in compressive, splitting tensile and flexural strength up to 85.1%, 43.75% and 52.54%, respectively. It is also found that, the optimum replacement level for both strength and permeability is found to be 15%. The ideal porosity of the concrete mix that reconciles permeability and strength is found to be 16.9%. The Scanning electron microscopy (SEM) image of Diatomaceous Earth sample composed largely of porous structure, which can tell the material has visible “inner” porosity. The high water demand of DE due to inner porosity has been mitigated by proposing consistency driven water demand for pervious concrete mixes containing DE.
Diatomaceous Earth (Brewery Silage) As Partial Replacement of Cement in Pervious Concrete
Pervious concrete is a special type of concrete with relatively high void content and high water permeability. Basically, it is leading construction material that meets the need of sustainable material for pavement construction. Using this pavement type avoids Environmental impacts, such as water pollution, water logging, climate change and urban hot islands. However, the usage of pervious concrete is limited to light weight traffic due to lower strength compares to the conventional concrete. On the other hand, increasing the demand of Portland cement concrete as a construction material increased the global warming by immersing carbon during the production. Partial replacement of cement with Diatomaceous Earth solve the aforementioned problems by enhances the mechanical properties of pervious concrete and decreasing the demand of Portland cement. It also minimizes cost and add sustainability feature by reducing landfills required to accommodate Diatomaceous Earth wastes. This study experimentally investigates brewery silage (Diatomaceous Earth) as a partial replacement of Portland cement in pervious concrete mix. Fresh and dry samples of mixtures were prepared in concrete laboratory and their respective mechanical properties were investigated through a series of tests. The investigations were performed using compressive strength, splitting tensile strength, flexural strength, permeability, hardened density and porosity tests. The experiment was designed by preparing mix considered 0 to 30% Diatomaceous Earth (DE) replacement of cement at 5% increment and tests were conducted at the ages of 7 and 28 days. Based on experimental investigation, DE has resulted an increase in compressive, splitting tensile and flexural strength up to 85.1%, 43.75% and 52.54%, respectively. It is also found that, the optimum replacement level for both strength and permeability is found to be 15%. The ideal porosity of the concrete mix that reconciles permeability and strength is found to be 16.9%. The Scanning electron microscopy (SEM) image of Diatomaceous Earth sample composed largely of porous structure, which can tell the material has visible “inner” porosity. The high water demand of DE due to inner porosity has been mitigated by proposing consistency driven water demand for pervious concrete mixes containing DE.
Diatomaceous Earth (Brewery Silage) As Partial Replacement of Cement in Pervious Concrete
Ayantu Mitiku (author)
2020-05-15
doi:10.20372/nadre/19802
Theses
Electronic Resource
English
DDC:
690
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