21–26mm aggregates are coarse crushed stones widely used in heavy-duty concrete mixes and road construction projects. Their relatively large size and durable composition make them ideal for structural applications that require high load-bearing capacity and long-term strength.

In construction, these aggregates are commonly incorporated into reinforced concrete, industrial flooring, bridge decks, and retaining walls, where they enhance the overall compressive strength of the concrete. Their angular shape ensures good interlocking and bonding with cement, resulting in a solid and stable mix.

In roadwork, 21–26mm aggregates serve as sub-base or base material, providing a strong foundation layer beneath asphalt or concrete pavements. Their ability to withstand heavy traffic loads and environmental wear makes them a reliable choice for highways, airport runways, and other high-traffic infrastructure.