A higher Fineness Modulus of aggregates indicates what about the aggregate size?

A higher Fineness Modulus indicates that the particles within the aggregate are generally larger. The Fineness Modulus is a numerical index that helps measure the coarseness or fineness of aggregates, typically calculated by summing the cumulative percentages of the aggregate retained on a series of standard sieves and dividing that sum by 100.

When the Fineness Modulus value is elevated, it reflects a greater proportion of the aggregate being retained on larger sieves, which means that the overall aggregate size is coarser. This characteristic is significant in concrete and construction applications, as it influences workability, strength, and other properties of the final composite material.

Thus, a higher Fineness Modulus is associated with larger average size of aggregate particles, which plays a crucial role in determining various engineering performance aspects of the materials being used.