| abstract |
In order to improve the performance of cementitious compositions or mortars in applications such as cementitious tile adhesive (CBTA) or external thermal insulation composite systems (ETICS), powdered polyurethane soft foam, preferably recycled powdered polyurethane soft foam, Are used in hydraulic binders or cementitious compositions, preferably as preliminary blending additives, with acidic polymer powders (RDP). The use of powdered polyurethane flexible foams as a partial replacement for RDP unexpectedly provides increased wetting mortar density, fast coagulation time, improved impact resistance and increased adhesion after soaking with excellent workability and fast open time. |