Mechanical and Microstructural Attributes of Cementitious Composites Incorporating Silicomanganese Fume

This study explores the feasibility of incorporating silicomanganese fume (SMF), a byproduct of the ferroalloy industry, as a sustainable supplementary cementitious material (SCM) in concrete. Cement was partially replaced with SMF at varying levels (0%, 10%, 20%, and 30%) to evaluate its impact on mechanical properties, microstructure, and environmental sustainability. Compressive strength tests revealed that up to 20% SMF replacement resulted in an 8% strength gain compared to the control specimen, attributed to its pozzolanic activity. However, replacement levels beyond 20% led to a decline in strength, highlighting the importance of optimizing substitution levels. Microstructural investigations using SEM/EDS confirmed that SMF enhances hydration and densifies the microstructure. In addition to mechanical and microstructural benefits, incorporating SMF offers significant environmental advantages. By reducing cement content, SMF effectively lowers concrete carbon footprint, addressing the pressing need for sustainable construction materials. Using this industrial byproduct also supports circular economy principles, diverting waste from landfills and promoting resource efficiency. The findings demonstrate that SMF can be a viable SCM for reducing the environmental impact of concrete production without compromising performance. This study highlights the dual benefits of improved mechanical properties and enhanced sustainability, positioning SMF as a promising material for greener construction practices. This work contributes to advancing the adoption of SCMs in concrete, providing a pathway to achieving carbon reduction targets and fostering sustainable development.