MORTAR COMPOSITION HAVING EMHANCED CRACK CONTROL PERFORMANCE AND REPAIRING AND REINFORCING METHOD OF CONCRETE STRUCTURE USING THE SAME

摘要

The present invention is a mortar composition with improved crack control performance, including 10 to 80% by weight of a crack-controlled binder, 10 to 80% by weight of fine aggregate, 0.01 to 20% by weight of a performance-improving admixture, and 0.1 to 30% by weight of water; The crack control type binder is based on 100 parts by weight of crude steel Portland cement, 40 to 70 parts by weight of calcium sulfoaluminate, 40 to 70 parts by weight of calcium fluorite smelting by-product, 10 to 30 parts by weight of magnesium chloride, 1 to 10 parts by weight of manganese carbonate, 1 to 10 parts by weight of hard shale protein and 0.1 to 5 parts by weight of clinoptilolite; The performance-improving admixture is, based on 100 parts by weight of the acrylamide-acrylic acid copolymer, 70 to 80 parts by weight of the polyamide-imide copolymer, 40 to 70 parts by weight of ethoxyethyl acrylate, and a poly-oligomeric represented by the following formula (1). Silsesquioxane 10 to 30 parts by weight, butyl (meth) acrylate-butadiene copolymer 10 to 30 parts by weight, poly(lactic acid) and poly(3-hydroxypropionate) (poly(3 -hydroxypropionate)) containing 1 to 10 parts by weight of biopolymer, 1 to 10 parts by weight of polyhydroxyalkanoate, 1 to 10 parts by weight of fermented paper sludge, and 0.1 to 5 parts by weight of xanthorazole; It satisfies basic physical performance and durability such as flexural strength, compressive strength, and adhesion strength in harsh environments where cracks are likely to occur, and improves crack resistance due to drying shrinkage, thereby minimizing defects even after repair and reinforcement. It relates to an improved mortar composition and a method for repairing and reinforcing concrete structures using the same. [Formula 1]