Molecular Structure and Application Prospect of Polycarboxylate Superplasticizer
Most of the polycarboxylate superplasticizers exist in liquid form on the market. The solid polycarboxylate superplasticizer has the advantages of reducing transportation cost and convenient storage, and is suitable for engineering technologies such as dry mortar, shotcrete and high-grade ceramics. The field has become a hot spot in the field of concrete water reduction research. At present, most of the research reports on powder polycarboxylic acid superplasticizers use a spray drying method to prepare a powder or granulated product by polymerizing an aqueous solution at a high temperature. The problem of adaptability of polycarboxylate superplasticizer to cement. In practical applications, there are many cement plants in China, production processes, cement varieties, cement composition, fineness difference, material sources are very different, and the use of regional environments is different. These problems have brought about the correct use of water reducing agents and the quality of controlled concrete. A lot of trouble. Therefore, the problem of adaptability of polycarboxylate superplasticizers to cement remains a problem that has been and must be solved in the future development. Sulphoaluminate cement (SAC) is a kind of special cement invented by China Academy of Building Materials Science in the 1970s. It is widely used in some aspects because of its characteristics of early strength, high strength, antifreeze and impermeability.