| abstract |
The present invention is a shrinkage reduction type comprising 5 to 45% by weight of a shrinkage-reducing strength developer, 10 to 75% by weight of fine aggregate, 7 to 65% by weight of coarse aggregate, 0.01 to 25% by weight of a polymer modifier, and 0.1 to 30% by weight of water. A polymer-modified superfast cement concrete composition comprising: The shrinkage-reducing strength generator includes 100 parts by weight of crude steel portland cement, 20 to 40 parts by weight of calcium sulfoaluminate, 1 to 20 parts by weight of tin oxide, 1 to 20 parts by weight of blast furnace slag, 1 to 20 parts by weight of zinc carbonate, and oxidized 0.1 to 10 parts by weight of magnesium, 0.1 to 10 parts by weight of sericite, and 0.1 to 10 parts by weight of calcium sulfate; The polymer modifier is 100 parts by weight of polymethylmethacrylate-(adamantyl)acrylate copolymer, 20 to 50 parts by weight of styrene-butadiene-styrene copolymer, 10 to 30 parts by weight of N,N-dimethyl acrylamide, Using a compound containing 0.1 to 10 parts by weight of phloretin sulfonate represented by Formula 1 and 0.1 to 10 parts by weight of polyrotaxane; It relates to a shrinkage-reducing polymer-modified super-fast cement concrete composition having excellent resistance to drying and shrinkage and improved resistance to freeze-thaw, neutralization and salt damage, and a concrete overlay pavement method using the same. |