High range water reducer, HRWR, has different names in different countries.
Europe and the United States used to call it superplasticizers, SP;
Germany named it superverflussigar;
In Japan call it air-entraining (AE) high range water reducer.
In the development process of concrete technology, the invention and application of superplasticizers are recognized as the 3rd technology breakthrough.
In recent years, the performance of concrete materials has been greatly improved. Chemical admixtures are making the rapid development of construction technology, especially in the performance of superplasticizers and its popularity in applications.