Typical Formulation Ingredients
Ingredient
Parts by weight
PVAc redispersible powder, RE526Z (Wacker)
PVA, Vinol 540S (Rohm and Haas)
(Source: Petrie, E.M., “Chemical Admixtures for Concrete and Mortar: Part II – Material Composition and Market Trends”, SpecialChem4Adhesives, 2007
Resulting Properties
Redispersible polymer powders work in almost the same fashion as latex admixtures except that the polymer is added as a dry powder in the cement mix before addition of water. During mixing with water prior to application, the redispersible polymer powder is re-emulsified in the modified mortar and concrete and behaves in the same manner as the latex admixtures.
The powders are dry blended with cement and aggregates. When the dry cement blend is mixed with water and agitated, the polymer powder re-disperses (re-emulsifies) easily and provides essentially the same systems as when liquid polymer latexes are directly applied to the cement mixture.