| abstract |
(57) [Summary] [Objective] To provide a cement-based injectable composition for repair, which has excellent injectability, adhesive strength, durability and the like. [Structure] (1) 30 to 80 parts by weight of Portland cement classified to a maximum particle size of 20 μm or less, (2) 20 to 7 blast furnace slag fine powder classified to a maximum particle size of 20 μm or less 0 parts by weight, (3) 0.5 to 3 parts by weight of melamine sulfonic acid formaldehyde high condensate, (4) 0.05 to 0.5 parts by weight of water-soluble cellulose derivative and (5) alkali metal nitrite and / or A cement-based injectable composition for repair, comprising 1 to 5 parts by weight of an alkaline earth metal nitrite. |