Development Trend of Polycarboxylate Superplasticizers and New Types of Superplasticizers
Key words
Polycarboxylate superplasticizer, high-strength self-compacting concrete, high dispersion, high slump retention, sulfonated chitosan superplasticizer, polycarboxylate superplasticized powder
The development of polycarboxylate superplasticizers is gradually moving towards precision and specialization in subdivided application fields.
High dispersion type polycarboxylate water reducer and high slump retention type polycarboxylate water reducer are synthesized by new technology. The combination of the two can be applied to high-strength self-compacting concrete. High-strength self-compacting concrete refers to high-performance concrete that can flow and compact under the action of its own gravity.
Adding water reducing agent can be gypsum with good slurry rheology and high hardening strength. By means of synthesis, a high-efficiency water-reducing agent with high water-reducing agent rate, less influence on gypsum coagulation, and green environmental protection polycarboxylate super-reducing agent can be prepared. It can be used for the production needs of the gypsum board assembly line.
The new superplasticized powder of polycarboxylate superplasticizer synthesized by special production process, such as centrifugal spray drying technology and low temperature control process, has excellent workability, better adaptability with other cementitious materials, and more High dispersion and dispersion retention.
Chitosan (CS) is a natural polymer material made from shrimp shells. Using this as raw material, sulfonated chitosan water reducing agent can be prepared. Sulfonated chitosan water reducing agent has good cement dispersibility and cement mortar water reduction rate, which can increase the fluidity of cement mortar and enhance the compressive strength of cement mortar.
