In concrete mixtures, what characteristic of aggregates can influence workability?

The characteristic of aggregates that influences workability includes shape, size, and texture. Workability refers to how easily a concrete mixture can be mixed, transported, placed, and finished. Among the factors influencing workability, the shape of the aggregates plays a significant role; angular aggregates tend to interlock more than rounded aggregates, making the mix less workable. In addition, the size of the aggregates affects the ability of the paste to coat them, and the texture determines how easily the paste adheres to the aggregate surface.

For instance, smoother aggregates allow for better flow of the concrete, increasing workability, while rough or jagged aggregates can create more friction and resistance, reducing workability. All these factors combined greatly affect how easily the concrete can be handled and finished in construction practices.