| 摘要 |
Construction chemical composition for tile mortar The present invention relates to a construction chemical composition applicable as fast setting floor and wall tile mortar exhibiting the pull-off strength values of at least 0,5 MPa after 6h as required by industrial norm DIN EN 12004 for fast setting cementitious tile adhesives ("F" classification). The composition comprises - preferably 25 - 45 wt% Portland cement, preferably free of fast-hardening aluminate cement - preferably 0,5 - 1 wt% hardening accelerator comprising calcium-silicate-hydrate CSH, preferably in combination with 0,5 - 2,5 wt% calcium salt, - preferably 1 - 5 wt% latex powder with a molecular weight of at least 500.000 g/mol - preferably 0,1 - 0,5 wt% water retention agent selected from at least cellulose ether - optionally rheology modifier - and the rest sand and CaCO3 filler. Although the composition is based on Portland cement it has a pull-off strength after 6h meeting the DIN requirements and can therefore be used as a fast setting tile mortar. Its properties do not depend on the quality of the Portland cement and due to the substitution of aluminate cement, it can be provided at overall low cost. |
