Influence of Eggshell Powder and Silica Fume as a Partial Replacement of Cement on the Properties of Concrete

Carbon dioxide (CO2) gas emissions from the cement manufacturing process have a harmful effect on the surroundings. The building sectors are looking for alternatives to cementitious material that can lower construction costs and reduce the effect of cement production on the surroundings. Concrete made with waste products as a cementitious material uses less cement, which lowers overall building costs and reduces CO2 emission. This study’s goal was to determine whether SF and ESP could substitute cement in the manufacturing of concrete. Cement was substituted by utilizing four percentages of eggshell powder (2.5%, 5%, 7.5%, and 10%), blended with four percentages of silica fume (5%, 10%, 15%, and 20%) by weight of cement. In this investigation, the M40 grade of concrete was utilized. The workability, compressive strength, flexural strength, water absorption, and UPV test of eggshell- and silica fume-based concrete were analyzed. The outcomes showed that as the SF and ESP content rose, concrete’s workability declined. ‘Good’ quality concrete was indicated by the UPV test. Furthermore, the inclusion of ESP and SF in concrete enhances the material’s compressive and flexural strength. Also, it was discovered that the highest mechanical strength properties were achieved by mixing 5% ESP with 10% SF in cement and as the content of waste material increases, the mechanical strength decreases.