Addition of Eggshell Powder and Silica Fume to the Compressive Strength of Normal Concrete

Nowadays, the need for concrete as a construction material is increasing rapidly. This requires innovation in the materials that make up concrete to reduce negative environmental impacts, including by using waste as concrete mixtures. In this research, compressive strength testing was carried out on concrete with a planned f'c of 25 MPa which was added with eggshell powder and silica fume. The addition of eggshell was 2%, 4%, 6%, and 8% of the weight of cement and the addition of silica fume was 5%, 10%, and 15% of the weight of cement. The results of the research show that concrete with the addition of 2% eggshell produces a maximum compressive strength of 24,168 MPa. Meanwhile, concrete with the addition of 2% eggshell and 5% silica fume produces a maximum compressive strength of 14,624 MPa. The higher the percentage of added eggshells and silica fume, the lower the compressive strength of the concrete