Raising the water content or adding chemical admixtures increases concrete workability.

Portland blast-furnace slag cement has a lighter colour, better concrete workability, easier finishability, higher compressive and flexural strength, lower permeability, improved resistance to aggressive chemicals and more consistent plastic and hardened consistency.

Fly ash from pulverized coal combustion is a typical mineral admixture utilized in the production of concrete, where it partially replaces cement and improves concrete workability, pumping characteristics, hardness and resistance to alkali attack.