Concrete admixtures in the concrete mixing process of incorporation, and according to the requirements to improve the properties of concrete materials. Select admixture species should be based on the main purpose of the use of additives, more determined by technical and economic. Admixture content, and the species should be used according to requirements, construction conditions factors, concrete and other materials determined experimentally. Admixture content (calculated as solids), shall be expressed as a percentage by weight of the cement, weighing errors should not exceed 2% of the specified measurement. The use of coarse and fine aggregate, should be consistent with current national standards. Mixed with the production and use of concrete admixtures should be consistent with existing national quality standards as well as concrete admixtures relevant standards, norms.