Ultra rapid harding concrete composition having the frost resistance and a repairing method of concrete structure using the same

摘要

The present invention is a fine aggregate 10 to 60% by weight, coarse aggregate 10 to 40% by weight, water 0.1 to 10% by weight, Portland cement 30 to 70 parts by weight, calcium sulfoaluminate 10 to 30 parts by weight, calcium hydroxide 1 to 10 parts by weight, Zinc sulfate 0.1 to 5 parts by weight, lithium carbonate 0.1 to 5 parts by weight, 5 to 25 parts by weight of a binder for concrete containing 5 to 10 parts by weight of cellulose fiber and 5 to 20 parts by weight of ethylene vinyl acetate, and 30 to styrene butadiene styrene latex Functional additives 1 to 20 containing 60 parts by weight, 3 to 25 parts by weight of a polyfunctional compound of the following formula (1), 20 to 50 parts by weight of a polyether-modified siloxane, and 5 to 30 parts by weight of an ethylene-ethyl acrylate-maleic anhydride copolymer Consisting of weight %, the air bubbles are stably maintained until curing even in a high temperature environment, and fine air bubbles are continuously maintained without coarsening of the air bubbles, so that the freezing resistance is excellent, so that the repair effect can be maintained for a long period of time. It relates to an excellent fast-setting cement concrete composition and a concrete structure maintenance method.