A retarding additive varieties a protecting coating around the surfaces on the cement particles. The barrier cuts down access by water molecules to the unhydrated cement, as a result it retards the hydration reactions. Inspite of these changes, freeze-thaw overall performance remains satisfactory for mixtures with First air written content https://concreteaccelerator22951.liberty-blog.com/32401474/air-entraining-things-to-know-before-you-buy