Water inseparable polymer cement mortar and concrete structure repair and reinforcement method using the same

摘要

The present invention improves long-term durability by improving physical properties, such as compressive strength, while maintaining the required characteristics of rapid hardness, material inseparability and high fluidity as a mortar material in repairing and reinforcing concrete structures by manufacturing a combination of specific materials. At the same time, by reinforcing the adhesive strength, the repair and reinforcement effect can be maintained for a long time, and the water inseparable polymer has advantages such as workability and eco-friendliness due to excellent material separation resistance and filling properties even in water due to excellent material inseparability. An object of the present invention is to provide a cement mortar and a method of repairing and reinforcing a concrete structure using the same. In addition, the present invention can promote the mixing of the inseparable polymer cement mortar in the water inseparable before/after loading even with the staggered input of the underwater inseparable polymer cement mortar to pursue the homogenization of the physical properties, and repair and reinforcement construction is also performed with the continuity of the mixing. It is another object to provide a mixer for an in-water inseparable polymer cement mortar which can be continued without interruption. The water inseparable polymer cement mortar according to the present invention for achieving the above object is 100 parts by weight of cement, 12.5 to 50 parts by weight of fine aggregate, 0.375 to 3.75 parts by weight of calcium armino ferritic expanding agent, alkylarylsulfonate and alkylammonium salt 0.0375 to 0.125 parts by weight of a powdery thickener containing, 0.0125 to 0.075 parts by weight of a polycarboxylic acid water reducing agent, 0.0025 to 0.025 parts by weight of a silicone antifoaming agent, 0.0005 to 0.025 parts by weight of a polyester antifoaming agent, aluminum powder, nitrogen gas foaming material, peroxide material 0.00025 to 0.0015 parts by weight of a gas foaming material consisting of any one of Ti[OCH(Cl ₃ ) ₂ ] ₄ and (CH ₃ ) ₂ CHOH 90 parts by weight of an ultra-fine particle titanium dioxide sol prepared by a weight ratio of 1:1; 70 parts by weight of a silica sol prepared by using C ₈ H ₂₀ O ₄ Si, (CH _{3 )CHOH in a 1:1 weight ratio;} Zn(C ₂ H ₃ O ₂ ) ₂ 15 parts by weight of zinc oxide sol; 100 parts by weight of a cement mixture comprising 2 parts by weight of at least one metal ion selected from Ag, Zn, and Cu; Based on 100 parts by weight of the cement mixture, 40 to 64% by weight of methyl methacrylate resin, 20 to 24% by weight of butyl acrylate resin, 1 to 3% by weight of nonyphenol, 10 parts by weight of a waterproofing agent composition comprising 1 to 3 wt% of a high fluidizer and 14 to 30 wt% of an additive; Based on 100 parts by weight of the cement mixture, 25 to 30% by weight of a methyl methacrylate resin; 25-30 wt% of polypropylene glycol acrylate resin; 5-10 wt% of Butyl Acrylate resin; 4-5 wt% of polyoxypropylene glycerol triether; 0.1 to 1% by weight of lithium silicate; 1-2% by weight of surfactant; 1 to 2 wt% of a polycarboxylic acid-based fluidizing agent; It is characterized in that it consists of 5 parts by weight of a finishing material consisting of 30 to 38% by weight of water. In addition, in the underwater inseparable polymer cement mortar mixer according to the present invention for achieving the above object, an input hopper is installed on one side of the cover, a discharge chute is installed under the main wall of the mixing barrel, and the bottom center of the mixing barrel is provided with a mixing vane, and a mixing machine for inseparable polymer cement mortar provided with a driving means for the mixing vane at the bottom of the mixing cylinder; An upper driving means is installed in the center of the cover, and an upper stirring vane is installed on an output shaft of the drive means passing through the center of the plane of the cover. And, the concrete structure repair and reinforcement method using an underwater inseparable polymer cement mortar according to the present invention for achieving the above object comprises the steps of chipping the deterioration part of the target structure (S 1); removing the rust of the reinforcing bar in the deteriorated area (S 2); High-pressure washing the rust removal portion of the reinforcing bar with high-pressure water (S 3); applying a primer to the surface of the deteriorated area of the high-pressure washed structure (S 4); mixing an inseparable polymer cement mortar in water on the primer to apply a base material to a predetermined thickness and a predetermined shape (S5); It characterized in that it consists of a step (S6) of applying a finishing material on the base material.