Concrete admixtures' construction chemicals are the ingredients other than water, portland cement, and aggregates that are used to modify the properties such as heat of hydration, accelerate or retard setting time, workability, water reduction, and dispersion and air-entrainment, impermeability, and durability factors. Concrete admixtures are available as mineral and chemical admixtures. Download PDF Brochure of Study, Click Here! Chemical admixtures are the ingredients in concrete other than portland cement, water, and aggregate that are added to the mix immediately before or during mixing. Producers use admixtures primarily to reduce the cost of concrete construction; to modify the properties of hardened concrete; to ensure the quality of concrete during mixing, transporting, placing, and curing; and to overcome certain emergencies during concrete operations. Chemical admixtures are the ingredients in concrete other than portland cement, water, and aggregate that are added to t...