| 摘要 |
PURPOSE: A polymer modified concrete composition for paving bridges is provided to improve the construction speed by mass-producing the composition using a ready-mixed concrete plant or a field batching plant, and to improve the seawater damage resistance. CONSTITUTION: A polymer modified concrete composition for paving bridges is formed of cement, aggregate, polymer emulsion, and water. The polymer emulsion contains a polycarboxylate-based surfactant or a water-dispersible urethane based surfactant for preventing the cohesion, and a nonionic surfactant for preventing the cohesion. The polymer emulsion contains a cement hydration retarder, and one of latex or acryl. The 0.1-10 wt% of polycarboxylate-based surfactant is contained in the polymer emulsion. 0.1-5 wt% of water-dispersible urethane based surfactant is contained in the polymer emulsion. 0.1-10 wt% of nonionic surfactant is contained in the polymer emulsion. [Reference numerals] (AA) Item; (BB) Cement; (CC) Water; (DD) Latex; (EE) Surfactant; (FF) Shrinkage reducing agent; (GG) Hydration delaying agent; (HH) Copolymer of polyethylene glycol mono(meta) allyl ether and maleic anhydride; (II) Copolymer of lene glycol mono (meta) allyl ether and (meth) acrylic acid; (JJ) Modified water-dispersible polyurethane copolymer; (KK) Fatty acid diethanol amine compound; (LL) Amine oxide; (MM) Nonylphenol ethylene oxide byproduct; (NN) Polyoxyethylene alkyl ether; (OO) Cycloalkyl polyoxyalkylene; (PP) Sodium gluconate; (QQ) Comparative example; (RR) Example-1; (SS) Example-2; (TT) Example-3; (UU) Example-4 |
