| abstract |
The present invention comprises 15 to 55% by weight of cement-based binder, 15 to 55% by weight of fine aggregate, 0.1 to 30% by weight of polymer-based admixture, and 5 to 40% by weight of water, and the cement-based binder has a Blaine powder of 3,500 20 to 80% by weight of ˜7,000 cm 2 / g of fine cement, 5 to 35% by weight of gypsum, 10 to 40% by weight of calcium aluminate and 0.1 to 10% by weight of lithium carbonate, wherein the polymer-based admixture is polyurethane resin 45 Cement mortar composition characterized by comprising ∼85 wt%, isocyanate-based curing agent 0.1-25 wt%, dibutyltin dilorate 0.1-20 wt% and phosphazene 0.01-15 wt%, concrete structure using same It relates to the repair method of the, injection repair method for the concrete structure, the surface treatment method of the concrete structure and the surface protection treatment method of the concrete structure. According to the present invention, it is cured within a short period of time, and while the construction time is short, the construction is easy, and the waterproofness, durability, and the like can be excellent. |