The concrete admixtures are also called concrete additives. These materials are added to the concrete before mixing or during the mixing process to improve the properties of the fresh concrete. The dosage of concrete additive is generally not more than 5% of the cement dosage. The characteristics of concrete additives are characterized by many varieties and small amounts, which have a great influence on the performance of concrete. In addition, it has the characteristics of less investment, quick effect and remarkable technical and economic benefits. Reasonable use of admixtures in concrete can achieve various technical-economic benefits such as saving cement, saving energy, shortening the construction period, improving concrete properties and construction operating conditions.