Fine aggregate (FA), commonly composed of sand or finely crushed stone, is a crucial component of concrete that fills the voids between coarse aggregates and assists in producing a compact and uniform concrete mix. The quality, size, and distribution of fine aggregates significantly affect the workability, strength, and durability of the concrete. Particularly under severe environmental conditions, the role of fine aggregates becomes critical as they influence the concrete’s ability to withstand weathering, chemical attack, and physical abrasion.