55–90mm aggregates are large-sized crushed stones commonly used in construction projects that require high strength and durability. Due to their substantial size, these aggregates are not typically used in everyday concrete work but are specifically chosen for heavy-duty applications such as foundations of large buildings, highways, bridges, retaining walls, and other load-bearing structures.

Their robust size and angular shape provide excellent load distribution and interlocking capability, making them highly effective in stabilizing large structural bases. These aggregates help reduce settlement and increase the overall stability of the concrete mix, especially in areas subjected to extremely high mechanical stress or weight loads. Additionally, they offer improved drainage and resistance to erosion, which is essential in road construction and other long-term infrastructure projects.