what are the chemical properties and it's role in PC base concrete admixture ?

Thank you for posting your query.

Can you please be more specific and let us know what do you mean by, "PC base concrete admixture" ?

Polycarboxylates or polymer based concrete admixtures are added to concrete for achieving High Self Compacting of concrete in less water utility. They are added at regions of constructions; where water is in limited in source.