| 摘要 |
FIELD: chemistry.SUBSTANCE: grouting mortar contains cement, aluminium powder, a complex additive - Alfacem A, in the following ratio, pts.wt: cement - 100, aluminium powder - 0.025-0.5, said complex additive - 2.5, water - 50-60.EFFECT: improved operational characteristics of the grouting mortar, particularly lighter hardened cement, obtaining tight contact between the hardened grouting mortar and the rock and the casing column.2 tbl |
