Faculty of Engineering, Technology, Applied Design & FineArt (FETADFA)
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Browsing Faculty of Engineering, Technology, Applied Design & FineArt (FETADFA) by Subject "Cement"
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Item Restricted Investigating the Effect of Coffee Husk Ash as Partial Replacement of Cement in Concrete C-15.(Kabale University, 2024) Ainembabazi, EdinaThis study explored the impact of incorporating Coffee Husk Ash (CHA) as a partial substitute for cement in concrete, aiming to lower costs and provide a sustainable disposal option for agricultural waste. CHA, obtained from the combustion of coffee husks, was added in varying proportions of 0%, 5%, 10%, and 15% by weight of cement, with a mix ratio of 1:1.5:3 and a water-cement ratio of 0.6. Compressive strength tests were performed at 7, 14, and 28 days of curing. The findings revealed that compressive strength increased with the addition of CHA up to 5%, in comparison to the 0% control sample; however, strength decreased significantly beyond this point. Consequently, it is advised to use CHA as a partial cement replacement at a maximum of 5%, as this not only improves compressive strength but also provides environmental advantages and lowers the costs associated with concrete production.Item Restricted Investigating the Effect of Wood Charcoal Dust as Partial Replacement for Cement in Plain Concrete.(Kabale University, 2024) Akankunda, LindahThe increasing demand for cement, driven by the current construction boom, has escalated its production, making it a critical component in concrete. However, the cement industry significantly depletes natural resources such as aggregates, consumes substantial energy, and contributes to environmental pollution. Utilizing by-products like Wood Charcoal Dust (WCD) and agricultural waste ashes offers a dual benefit: addressing disposal challenges and providing a sustainable alternative to cement in concrete production. Incorporating WCD as a partial replacement for cement can lower construction costs and promote environmental sustainability. This research investigates the impact of Wood Charcoal Dust (WCD) on the compressive strength of concrete. WCD was used as a partial substitute for cement, and its effects on concrete properties were analyzed. Concrete cubes measuring 150 mm × 150 mm × 150 mm were tested for compressive strength after water curing for 7, 14, and 28 days. The results were compared with conventional concrete (C20 mix), revealing notable improvements in compressive strength when WCD was incorporated. The optimum replacement percentage of cement with WCD was also determined. Cement was partially replaced with WCD at proportions of 5%, 10%, 15%, and 20% by weight. Tests conducted included slump tests, compressive strength, durability (water absorption), and fresh density at varying WCD percentages. The findings indicated that the maximum compressive strength was achieved with a 5% WCD substitution. The slump test results showed a decrease in workability as the WCD content increased, and the compressive strength declined with higher WCD replacement levels. Chemical analysis revealed that WCD contains pozzolanic materials, with a combined SiO₂, Al₂O₃, and Fe₂O₃ content of 20.69%. In conclusion, replacing cement with 5% WCD provides the optimal balance, enhancing compressive strength while maintaining workability. This substitution demonstrates the potential of WCD as an environmentally friendly and cost-effective cement alternative for sustainable construction.