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%|