Admixtures: Admixtures play a vital role in production of quality concrete and mortars in all segments of the industry –Ready-mix, precast and site-batch. It is the ingredient in concrete other than cement, water and aggregate that is added to the mix immediately before or during mixing. Use d primarily to reduce the cost of concrete construction, to modify the properties of hardened concrete; to ensure the quality of concrete during mining, transporting, placing, and curing; and to overcome certain emergencies during concrete operations.