LATEX MODIFIED UTRA HIGH EARLY STRENGTH CEMENT CONCRETE COMPOSITION HAVING EXCELLENT FREEZING AND THAWING DURABILITY AND SALT DAMAGE RESISTANCE AND REPAIRING METHOD FOR ROAD PAVEMENT THEREWITH

摘要

The present invention is a latex-modified ultra-strength cement concrete composition having excellent salt damage and freeze-thaw resistance, 10 to 40 wt% of ultra-strength binder, 10 to 50 wt% of fine aggregate, 5 to 40 wt% of coarse aggregate, 0.1 to 10 wt% of mixing water % and 0.1 to 10% by weight of a latex modifier; The ultra-strength binder is based on 100 parts by weight of crude Portland cement, 20 to 40 parts by weight of calcium aluminate, 10 to 30 parts by weight of magnesium sulfate, 10 to 30 parts by weight of Zonotolite, 0.1 to 5 parts by weight of citrus peel fiber, and the following formula 1 to contain 0.1 to 5 parts by weight of modified sulfur and 0.1 to 5 parts by weight of biocellulose powder; The latex modifier is 60 to 80% by weight of styrene, 10 to 30% by weight of methyl methacrylate, 1 to 20% by weight of 2-ethylhexyl 2-propenoate, and 2-propenamide-co-prop-2-eno 50 to 70% by weight of a core consisting of 0.1 to 5% by weight of ic acid, and surrounding the core, 60 to 80% by weight of methyl methacrylate, 10 to 30% by weight of styrene, 4-bromo-pent-4-enoic acid 1 to 20% by weight, 0.1 to 5% by weight of N-isopropylacrylamide and 30 to 50% by weight of a shell consisting of 0.1 to 5% by weight of cyclohexyl acrylate; The latex modifier by having a structure having a concentration gradient in which the composition ratio of styrene continuously decreases from the center of the core to the outer shell of the shell; Latex-modified ultra-strength cement concrete composition having excellent resistance to salt and freeze-thaw, which exhibits excellent strength characteristics at an early stage and can extend the durability of structures with excellent resistance to salt and freeze-thaw, and a road pavement repair construction method using the same will be. [Formula 1] In the above formula, R 1 is H or a linear or branched C1 to C4 alkyl group, n is an integer from 0 to 5;