What components are commonly found in blended cement?

Blended cement is specifically formulated to improve durability, workability, and overall performance compared to plain Portland cement. The inclusion of components such as Portland cement, fly ash, slag, and hydrated lime contributes to its enhanced qualities.

Portland cement serves as the primary binding agent. Fly ash, a byproduct of coal combustion in power plants, enhances workability and long-term strength while reducing permeability. Slag, which is produced from the smelting of iron ore, adds additional strength and can improve resistance to chemical attacks. Hydrated lime helps to increase the plasticity and workability of the mixture.

In contrast, other options do not represent the composition of blended cement accurately. For example, sand, gravel, and lime are associated more with general concrete mixes than with blended cement specifically. The option mentioning only cement lacks the essential components that define blended types. Lastly, while water, sand, and additives are components of various concrete mixtures, they do not capture the distinct characteristics of blended cement.