Browsing by Author "Samrawit Yeshaw"

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    Solid Waste Bottom Ash as A Partial Replacement of Cement in Concrete Production
    (Addis Ababa University, 2023-06) Samrawit Yeshaw; Abrham Gebre (PhD)
    Cement production is hazardous to the environment due to generation of high carbon dioxide (CO2) and heat. To reduce CO2 emissions and protect the environment, researchers have found a wide variety of waste products that can be used as additional cementitious materials for concrete. The most common supplementary cementitious materials are fly ash, blast furnace, silica fume, bottom ash and others. Solid waste bottom ash is one of the supplementary cementitious materials. Solid waste resources are increasingly being used in the production of concrete. Particularly, using recycled solid waste in place of cement, a key component of concrete, has appealed due to its ability to reduce greenhouse gas emissions. The purpose of this study is to investigate the use of Municipal Solid Waste Incinerator Bottom Ash (MSWI) as partial replacement of cement and study the properties of concrete. Concretes were casted to compare the compressive strength, splitting tensile strength, flexural strength. Moreover water permeability test is done on normal strength concrete when cement is partially replaced with municipal solid waste bottom ash at different percentages. The workability of concrete decreased with an increase of percentage replacement of cement by Bottom ash. The obtained results of compressive, tensile and flexural strength show decrement with an increase of BA. However, the replaced concrete samples possess a better water tightness performance than the controlled sample. Solid waste bottom ash can be used to partially replace cement in a normal strength concrete.