Gypsum retarder

Gypsum retarder: is a chemical additive added to gypsum building materials, mainly used to prolong the setting time of gypsum, thereby providing longer working time and better construction performance. Mechanism of action: Gypsum retarder delays the growth and setting process of gypsum crystals by affecting the hydration reaction of gypsum slurry. Common retarders include organic acids, inorganic salts, high molecular polymers, etc., which can react with calcium ions, sulfate ions, etc. in gypsum to form complexes or reduce the activity of ions in the solution, thereby achieving the effect of slow setting. Product characteristics: Gypsum retarders are usually powdery, easily soluble in water, non-toxic and odorless. They can effectively control the setting time of gypsum, so that gypsum can maintain fluidity for a period of time, reducing the waste and loss of gypsum. Application field: Gypsum retarders are widely used in gypsum building materials made of plastering gypsum, bonding gypsum, gypsum putty, gypsum products, etc., mainly to reduce the setting speed of gypsum. Classification of retarders: There are three main types of commonly used retarders: organic acids and their soluble salts, alkaline phosphates, and proteins. Organic acid and its soluble salt retarders mainly include citric acid, sodium citrate, tartaric acid, potassium tartrate, acrylic acid, and sodium acrylate. Technical advantages: The new organic acid retarder has higher stability and lower dosage, and can more effectively control the setting time of gypsum. Nanomaterial retarders change the microstructure of gypsum slurry, affect its hydration reaction process, and achieve the retarding effect. Environmental protection: Gypsum retarders tend to be organic components with harmless ingredients, or protein products, to meet market and environmental protection requirements. Economic benefits: The use of gypsum retarders can improve the workability of gypsum products, improve construction performance, reduce material waste, and improve construction efficiency. Convenience of construction: The addition amount of gypsum retarders is low and the effect is good, which can significantly improve the construction performance and durability of gypsum materials. Gypsum retarders play an important role in the production of gypsum building materials, helping to improve the performance and construction efficiency of gypsum materials.