The increasing global concern over natural resource depletion and industrial waste accumulation has driven extensive research into sustainable concrete production. Self-compacting concrete (SCC), owing to its superior flowability, workability, and durability, offers significant potential for integrating industrial and agricultural by-products as supplementary cementitious materials (SCMs) and aggregate substitutes. This review synthesizes findings from five key studies examining the performance of SCC incorporating ferrochrome slag (FS) as a fine aggregate replacement, rice husk ash (RHA) as a cement substitute, limestone powder (LP), unground rice husk ash (URHA), metakaolin (MK), and nano silica (NS) as supplementary materials. The review covers fresh-stage properties, mechanical strength, durability characteristics, microstructural behavior, environmental implications, and statistical validation methods. Results consistently indicate that FS can replace natural fine aggregate up to 40% without significant compromise in structural performance, while RHA incorporated at 10-15% enhances compressive and tensile strength. Combined use of LP and URHA in slag-cement SCC further improved strength efficiency and reduced shrinkage. Functional ANOVA analysis confirmed no statistically significant difference in compressive and split tensile strength when sand is partially replaced with FS. Environmental assessments reveal reduced carbon footprint, embodied energy, and cost savings when waste materials are incorporated.

Keywords: Self-compacting concrete; Ferrochrome slag; Rice husk ash; Supplementary cementitious materials; Limestone powder; Durability; Sustainability; Functional ANOVA; Microstructure