What is the purpose of adding retarder and water reducing agent to pumped concrete?

1. retarder: pumped concrete mostly uses commercial concrete, which requires small slump loss. especially for large-volume concrete or concrete constructed at high temperatures in summer, retarder must be added. components. when ordinary water reducing agents cannot meet the retarder requirements, chemical retarder should be added, such as hydroxycarboxylic hydrochloric acid, sugars, polyols, etc. it can…