retarder

1. Precautions for the use of retarder In the use of retarder, should be based on different construction temperatures, through the test to find the best mixing amount of retarder. Then according to the construction requirements of the initial solidification time. In the range of the best dosage with the corresponding reasonable dosage. In order

1.Definition of retarder Retarder is an additive that reduces the hydration rate and heat of hydration of gypsum and prolongs the setting time. 2.Classification of retarder At present, there are mainly three kinds of gypsum retarders in common use. ① organic acids and their soluble salts: hydroxycarboxylic acid and its salt, citric acid, tartaric acid