| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to dry mortar compositions based on portland cement, mineral aggregate in form of sand, a super-plasticiser and an ultra-fine silica additive, meant for preparing finishing mortar. The dry construction mixture contains portland cement, graded sand, super-plasticiser S-3 and ultra-fine silica additive - amorphous silicon dioxide which is a product of thermal treatment of rice husks, with the following content of components, wt %: portland cement 33.09-33.13, graded sand 66.19-66.27, super-plasticiser S-3 0.30-0.36, amorphous silicon dioxide 0.30-0.36. ^ EFFECT: higher water impermeability and adhesive strength of the mortar. ^ 2 tbl |
