What additives should be added to underwater concrete of cast-in-place pile?

Polycarboxylic acid water reducer should be added to underwater concrete of cast-in-place pile.

Polycarboxylic acid high performance water reducer

HSC polycarboxylic acid high performance water reducer is a new generation of high performance water reducer developed by our company. After adding this product, the concrete has high slump retention performance, and the slump is basically not lost within half an hour. 1h slump loss is very small, which has the characteristics of low dosage of external regenerant, high water reduction rate and small shrinkage. Adding this product can greatly improve the fluidity of concrete and keep good construction performance of concrete for a long time; At the same time, it can improve the workability and physical and mechanical properties of concrete and improve the quality of concrete.