In the prestressed pipe pressure slurry retarded beauty is what kind of seam an agent

Prestressed pipe pressure slurry in retarding the seam an agent in the prestressed pipe pressure slurry retarded the seam an agent kinds of prestressed pipe pressure slurry prestressed pipe pressure slurry retarded beauty seam an agent, prestressed pipe pressure slurry of retarding the definition of the seam an agent of retarding the seam an agent is to reduce the hydration speed and hydration heat of cement or gypsum, prolong the setting time of a kind of beauty to add seam an agent. With reference to national standard 'concrete and the classification of the seam an agent, naming and definition of' ( GB8075 - 87). The regulation, the definition of beauty for the retarded mortar seam an agent is as follows: retarded seam an agent in the United States: extend the slurry setting time to add the seam an agent. Second, the prestressed pipe pressure slurry retarded the types of the seam an agent according to the structure of prestressed pipe pressure slurry can be retarded the seam an agent is divided into the following categories: 1. Sugar sugar, calcium, gluconate, calcium sugar is made from a sugar residues after lime treatment 2. Hydroxy carboxylic acid and its salts citric acid, tartaric acid and its salt, wine with natural tartaric acid retarding effect is best. 3. : inorganic zinc salt, phosphate, etc. 4. Lignin sulfonate, etc in all retarded the seam an agent, lignin sulfonate maximum amount and has good water reducing effect.