eng Science and Education Publishing American Journal of Civil Engineering and Architecture 2328-3998 2018-04-17 6 4 133 139 10.12691/ajcea-6-4-1 AJCEA2018641 article Abrham Hawaz W/amanuel 1 Emer Tucay Quezon quezonet09@gmail.com 2 Mamuye Busier 3 Department of Civil Engineering, College of Engineering, Hawassa University, Hawassa, Ethiopia Department of Civil Engineering, Institute of Technology, Ambo University and affiliated with Jimma Institute of Technology, Jimma University, Jimma, Ethiopia Faculty of Civil & Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia Cement being the main constituent of concrete plays a vital role in concrete production. In Ethiopia, the cement consumption has grown well with a growth rate of about 16.1% per year. Hence, an alternative material to partially replace cement was initiated to reflect the needs of local community in the study area. The waste quantity of animal bones has impacted the environment which are unusual to see in other Non-African countries. The primary aim of the research is to investigate the effects of varying dosage replacement of cement by animal bone powder (ABP) in the normal concrete production. The bone samples collected from Seka Waste Disposal Site of Jimma town, approximately 10km from the bus station where a quantity of waste animal bones can be found. After cleaning and drying, the bone samples burned in the Furnace. The average required energy to burn the animal bone obtained at a temperature of 340°C. The burnt bone was allowed to cool before grinding in a hammer mill and sieving. There were six proportions prepared to start from 0% (as control specimen), 5%, 10%, 15%, 20% and 25% dosage increment by weight of bone powder, and evaluated the normal concrete strengths of C-25 grade concrete. The laboratory test results indicated the chemical analyses of bone powder composed similar compounds of oxide in cement but slightly lesser in content based on ASTM C-150. Likewise, the effects of replacing animal bone on the properties of cement such as consistency and setting time remained within the acceptable limits of the Standard Specifications. On the other hand, the results of compressive, flexural tensile, and the split tensile strengths significantly declined from the control specimen during the dosage increment of the replacement made. Therefore, the optimum dosage of bone powder indicated 10% by weight to replace cement content in normal concrete mix production. http://pubs.sciepub.com/ajcea/6/4/1/ajcea-6-4-1.pdf animal bone powder cement concrete strengths optimum dosage partial replacement