Mortar composition for repairing and reinforcing underwater concrete structures and method of repairing and reinforcing underwater concrete structures using the same

摘要

The present invention relates to a mortar composition for repair and reinforcement of an underwater concrete structure and a repair and reinforcement method for an underwater concrete structure using the same. More specifically, in repairing and reinforcing the underwater concrete structure, physical strength such as compressive, bending, and tensile strengths of a repairing and reinforcing surface is strengthened. Durability and water resistance are improved by strengthening the bonding strength with a concrete surface, and chemical resistance and waterproof properties are excellent. Moreover, the present invention has excellent resistance to freeze-thawing and salt damage, can maintain a repair and reinforcement effect of the underwater concrete structure for a long time, and can stably complete underwater repair and reinforcement work in a short time, thereby being economical and solving environmental pollution and quality degradation problems caused by material separation. The present invention comprises 100 parts by weight of a binder, 100 to 200 parts by weight of a silica sand, 0.5 to 10 parts by weight of a reinforcing fiber, 10 to 50 parts by weight of a polymer, 0.5 to 2.0 parts by weight of a shrinkage prevention agent, 3 to 7 parts by weight of a silica fume, 0.5 to 10 parts by weight of a clinker, 0.5 to 10 parts by weight of a plaster, 0.5 to 10 parts by weight of an alpha-type hemihydrate gypsum, 0.01 to 5 parts by weight of a fly ash, 0.1 to 5 parts by weight of a red mud, 0.01 to 10 parts by weight of a calcined pozzolana, 0.01 to 10 parts by weight of a microsilica, 0.1 to 1.0 parts by weight of a defoamer, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a thickener mixture.