Prediction of service life in concrete by using SCM's with partial replacement by fly ash, Slag and Silica fume

This research paper explores the use of SCMs (Supplementary Cementitious Materials) in concrete to enhance durability and predict service life. The study focuses on partial replacement of cement with fly ash, slag, and silica fume. The paper discusses durability-based design, fundamentals of corrosion, carbonationinduced corrosion, and chloride-induced corrosion. The literature review covers studies on the use of SCMs in concrete and their impact on chloride resistance and compressive strength. The paper assesses the properties of materials used in concrete and uses Life-365 software to predict the service life of concrete made of different mixes. The software analysis shows that using fly ash, slag, and silica fume individually can increase the service life of concrete, but combining SCM's can significantly improve the service life. The paper also presents the results of a compression test conducted on specimens containing different combinations of SCMs. The most preferred combination of SCM's for durability purposes is Fly ash + Silica fume. The paper recommends not performing accelerated curing before RCPT and curing specimens containing SCM's for 56 days before testing