Shrinkage Reducing Agents
Shrinkage reducing agents (as the Sitren® products from EVONIK) can reduce the volume reduction over time of cementitious products. In practice, plastic shrinkage and drying shrinkage can occur. The additives improve wetting of the cement grains and promote a fine air void distribution which reduces the degree of both effects.
Among the additives are products based on glycol ethers or modified polyethers. The latest generation is very low in VOC content, so they fulfill the requirements of the Emicode EC-1 plus regulation.
Our product range includes both liquid additives for concrete admixtures as well as powdered additives for use in dry mortars (repair mortars, tile adhesives, levelling compounds, grouts or renders).
|Product||Chemistry||Recommended use level (%)|
|Sitren® SRA P 260||Mod. polyether on inorg. carrier||0.2 - 2.0 on dry mortar|
|Sitren® SRA P 270||Mod. polyether on inorg. carrier||0.2 - 2.0 on dry mortar|
|Sitren® PSR 105||Mod. glycol on inorg. carrier||0.5 - 2.5 on dry mortar|
|Sitren® SRA L 210||Modified polyether||0.5 - 3.0|