Cement Retarder (Sodium Gluconate, Citric Acid, Tartaric Acid, etc.)

Cement retarders can delay the cement hydration reaction, thereby prolonging the setting time of concrete, making fresh concrete maintain plasticity for a long time, facilitating pouring, and improving construction efficiency. It does not affect concrete in the later stage admixtures. Examples include Lignosulfonate and its derivatives, low molecular weight cellulose and its derivatives, hydroxycarboxylic acid (salt), organic phosphonic acid (salt), boric acid (salt), etc.