Denka CSA20 is an expansive additive which forms a stable ettringite crystalline structure within the cement matrix and gives a durable shrinkage reduction.

The additive reduces shrinkage, heat of hydration and may increase strength. In Europe these additives are used mainly in shrinkage compensated external renders, concrete repair and screeds.



Concrete Mix Propotion  
Ordinary Portland Cement : 295kg/m3
Power CSA Type-S : 25kg/m3
W/(cement+ P-CSA) : 50.0%
Sand-Aggregate ration : 44.6%