Fast-hardening cement concrete composition with improved long-term durability And method for repairing and rehabilitating road pavement using the composition

摘要

The present invention in the fast-setting cement concrete composition with improved long-term durability, fast-setting mixed material 5 to 45% by weight, fine aggregate 30 to 60% by weight, coarse aggregate 15 to 60% by weight, latex modifier 3 to 20% by weight, and water 2 Containing to 25% by weight, the fast-setting mixture is crude steel Portland cement 20 to 80 parts by weight, magnesium sulfoaluminate 10 to 50 parts by weight, amorphous tricalcium aluminate 1 to 30 parts by weight, mullite 5 to 20 parts by weight , 0.01 to 10 parts by weight of alkylene amide, 0.01 to 10 parts by weight of propylene glycol alginate, 0.01 to 10 parts by weight of calcium stearate, and 0.5 to 10 parts by weight of calcium aluminate, and the latex modifier is 30 to 65 parts by weight of chloroprene rubber , 10 to 30 parts by weight of siloxane rubber of a network structure, 15 to 30 parts by weight of cellulose nanofibers having a lignin content of 25 to 40% by weight and a hydroxymethyl group not modified with a carboxylic acid or salt thereof, and 1 to 30 parts by weight of a natural shellac resin Containing 10 parts by weight, and maintaining watertightness, adhesion, durability, and crack resistance, and excellent chloride penetration resistance and freeze-thaw resistance according to temperature change, the fast-setting cement concrete composition and road pavement maintenance method with improved long-term durability. will be.