Mortar composition for repairing cross-section of concrete structure with fast hardening durability and waterproof and method of repairing cross-section of concrete structure using the same

摘要

The present invention relates to a mortar composition having a rapid curing property, durability and a waterproof property for repairing a concrete cross section and a method for repairing a cross section using the same. More specifically, provided is a method for repairing a cross section of a concrete structure, wherein durability and adhesion strength are enhanced in repairing damaged portion of a deteriorated concrete structure to keep a repairing effect for a long time and, at the same time, make repair work stably completed for a short time. According to the method of the present invention, an excellent economical effect and an outstanding effect of preventing neutralization of concrete can be provided and, in particular, water tightness is strengthened to minimize an influence of an external atmospheric environment such as acid rain, and a binder and a controlling agent are mixed at an optimal ratio to control speed of coagulation and elicit a rapid curing property. When the method of the present invention is used to repair the damaged portion of a concrete structure, very excellent physical properties such as bending strength, tensile strength and compression strength and the like can be provided, good capability of attachment to a concrete structure can be given, and outstanding chemical resistance and a waterproof property are also provided. Moreover, excellent resistance for freezing and thawing and damage from sea water is provided. In addition, a curing speed of mortar is increased and an effect of preventing neutralization and a waterproof effect can be enhanced. In particular, water tightness is strengthened to minimize an influence of an external atmospheric environment such as acid rain, and a binder and a controlling agent are mixed at an optimal ratio to control a coagulation speed and elicit a rapid-curing property. In addition, a surface protection agent which has excellent adhesion force with mortar for repairing the lower part, and outstanding impact resistance, chemical resistance, a waterproof property, neutralization prevention, corrosion resistance, anti-fungal property, contaminant resistance, permeability, weather resistance and the like is used to keep an effect of repairing a cross section for a long time. The present invention comprises: a first step of cleaning a surface of a degraded portion by using high pressure cleansing water; a second step of coating an exposed reinforcing bar with an anti-corrosion coating agent; a third step of coating a surface where the anti-corrosion coating agent is coated with mortar composition for repairing cross-section; and a fourth step of coating a surface where the mortar composition for repairing cross-section is coated with a surface protecting material.