| 摘要 |
The present invention relates to a cement mortar composition for repairing a cross-sectional surface of a concrete structure, and to a method for repairing a concrete structure by using the same. The cement mortar composition comprises 10-60 wt% of a mineral binder, 20-70 wt% of a fine aggregate, 0.01-15 wt% of a powder function improver, and 1-20 wt% of water. The powder function improver comprises 35-98 wt% of styrene-p-methoxystyrene, 1-45 wt% of vinyl acetate, 0.1-35 wt% of methylmethacrylate-butadiene-styrene, 0.1-25 wt% of polyvinyl acetate-vinyl versatate, and 0.01-25 wt% of polyvinylpyrrolidone. According to the present invention, fluidity, flexural strength, tensile strength, adhesive strength, and durability are excellent, and flexural toughness, acid resistance, salt damage resistance, neutralization resistance, freezing and thawing resistance, and water tightness are improved. Thus, concrete corrosion caused by chemical erosion can be prevented, so maintenance costs used therefor can be remarkably reduced. |
