KR100644768B1 - Concrete Surface Hardener and method of treating Concrete Surface using the same - Google Patents

Abstract

The present invention relates to a concrete surface reinforcing agent and a method for forming concrete having a reinforced surface using the same, wherein the concrete surface reinforcing agent comprises 50 to 80% by weight of a silicate resin mixture comprising a sodium silicate resin and a metal modified sodium silicate resin, and 0.1 to 5 weight of silica fine powder %, Surface tension modifier 0.01 to 5.0% by weight, stabilizer 0.01 to 5.0% by weight, water repellent 0.01 to 5.0% by weight, disinfectant 0.01 to 2.0% by weight, antifoaming agent 0.01 to 3.0% by weight and water 5 to 40% by weight. Such concrete surface reinforcing agent is good in appearance, storage stability, surface workability and drying properties, and can form concrete having excellent wear resistance, permeability ratio, adhesion strength and flame retardancy.

Description

Concrete Surface Hardener and method of treating Concrete Surface using the same

The present invention relates to a concrete surface reinforcing agent and a surface treatment method of concrete using the same, and more particularly, to a concrete surface reinforcing agent mainly composed of sodium silicate resin and metal modified sodium silicate resin and the surface treatment method of concrete using the same.

In general, the finishing method of concrete applied as a flooring material is a method of thickening the coating material for polyurethane or epoxy resin flooring material with a thickness of 1 ~ 5mm. This coating method has the advantages that the organic resin has, but the construction cost is high, and has a disadvantage in that the construction is not easy to renovate.

In addition, although a dense impermeable dry coating film is formed on the surface of the concrete, temporary adhesion is exerted, but chemical reaction with the concrete component is difficult to expect. Therefore, in the case of the floor finishing process of thick coating of the organic paint, defects such as lifting, cracking, swelling, or partial detachment of the dry coating may occur due to the expansion of vaporized water in the concrete.

Applicant applied for a water-soluble inorganic transparent coating composition patent in December 2002. This patent discloses a water-soluble inorganic transparent coating composition which can be applied to concrete-based materials to prevent premature aging of the concrete itself and at the same time re-reinforce the aged concrete. The coating composition disclosed in the above-mentioned patent is an amorphous colo stabilized with 40 to 70% by weight of lithium silicate, 5 to 20% by weight of an aqueous emulsion butyl acrylate / stylene copolymer, and stabilized with an inorganic dispersion. This month contains 10 to 40% by weight of Colloidal Silica and extra additives.

The coating composition may be coated on concrete to solve problems such as lifting and dropping due to impermeability and air permeability, and whitening and initial water resistance problems. However, when the characteristics such as wear loss, flame retardancy and adhesion strength are more important than problems such as initial water resistance or whitening, such as a parking lot building, it is not suitable.

In addition, inorganic flooring using sodium silicate as a concrete surface reinforcing agent is sometimes fused with concrete components by chemical reaction with calcium hydroxide in the concrete components, and the neutralized concrete neutralized by the strong alkalinity of sodium silicate itself. In addition to converting and strengthening, it has the advantage of being inexpensive compared to other alkali silicates. However, in the case of conventional sodium silicate, the reaction does not occur uniformly due to the rapid reaction at the concrete surface, or when the water is contacted with water to form a hydrated material, which causes whitening on the concrete surface. Due to the nature of the cable, there are many problems in the initial water resistance.

It is an object of the present invention to provide a concrete surface reinforcing agent composition which is applied to form a concrete surface having good appearance, dryness, transparency, etc., and excellent wear loss, permeability ratio, adhesive strength and flame retardancy. have.

Another object of the present invention is to provide a method for surface treatment of concrete by applying the above-mentioned concrete surface strengthening agent composition.

Coating composition according to an embodiment of the present invention for achieving the object of the present invention is a silicate resin mixture containing sodium silicate resin and metal modified sodium silicate resin 50 to 80% by weight, silica fine powder 0.1 to 5% by weight, surface tension 0.01 to 5.0% by weight of stabilizer, 0.01 to 5.0% by weight of stabilizer, 0.01 to 5.0% by weight of water repellent, 0.01 to 2.0% by weight of disinfectant, 0.01 to 3.0% by weight of antifoam and 5 to 40% by weight of water.

In addition, in the concrete manufacturing method having a reinforced surface according to an embodiment of the present invention for achieving another object of the present invention, a silicate resin mixture 50 to 80% by weight, including silicate resin and metal modified sodium silicate resin, silica Fine powder 0.1 to 5 wt%, surface tension modifier 0.01 to 5.0 wt%, stabilizer 0.01 to 5.0 wt%, water repellent 0.01 to 5.0 wt%, bactericide 0.01 to 2.0 wt%, antifoaming agent 0.01 to 3.0 wt% and water 5 to 40 wt% To form a concrete surface reinforcement comprising a. The concrete surface enhancer is then applied to the plastered concrete surface. Then, the concrete surface strengthening agent remaining on the concrete surface is removed. The concrete is then formed with a reinforced surface by drying the concrete.

Concrete surface reinforcing agent according to the present invention can be used to reinforce the surface of the concrete laid on the floor, and provides excellent wear resistance, adhesion strength and flame retardancy to the concrete.

Hereinafter, the present invention will be described in detail.

Concrete surface reinforcing agent of the present invention is a composition for reinforcing the surface of the concrete laid on the floor, silicate resin mixture containing sodium silicate resin and metal modified sodium silicate resin, fine silica powder, surface tension modifier, stabilizer, water repellent, bactericide, antifoaming agent And water.

The silicate resin mixture includes 25 to 65% by weight of sodium silicate resin and 35 to 75% by weight of the metal modified silicate resin. In particular, the sodium silicate resin has a molar ratio of SiO ₂ to Na ₂ O (Molecular Ratio) is in the range of 3.2 to 4.5, preferably has a 3.5 to 4.2 molar ratio. The sodium silicate resin has a solid content of 30 to 40% by weight, preferably 33 to 38% by weight of the total weight. Herein, the molar ratio is 3.2 to 4.5 mol of SiO ₂ with respect to 1 mol of Na ₂ O.

The metal modified sodium silicate resin preferably has a mole ratio of SiO ₂ to Na ₂ O in the range of 3.2 to 4.5, and more preferably 3.5 to 4.2 molar ratio. The sodium silicate resin preferably has a solid content of 30 to 40% by weight, more preferably 33 to 38% by weight of the total weight. It is also preferable that the mixing ratio of the sodium silicate resin and the metal modified silicate resin is 25:75 to 65:35. The metal modified sodium silicate resin is an aluminum modified sodium silicate resin modified by aluminum metal.

Here, when the content of the silicate resin compound of the first component included in the concrete surface reinforcing agent is less than 50% by weight, there is a problem that the effect as a surface reinforcing agent is insufficient, such as reinforcing effect and adhesion strength of the concrete surface is significantly lowered. do. On the other hand, when the content of the silicate resin compound exceeds 80% by weight, it is not preferable because the surface treatment workability of the concrete is inferior.

Therefore, the concrete surface strengthening agent preferably contains 50 to 80% by weight of the silicate resin compound, more preferably 60 to 75% by weight.

In addition, when the content of the sodium silicate resin to the silicate resin compound is less than 25% by weight, or the content of the metal modified silicate resin to the silicate resin compound exceeds 75% by weight, the storage stability of the silicate resin compound is inferior A problem occurs. On the other hand, when the content of sodium silicate resin is more than 65% by weight, or the content of the metal modified silicate resin is less than 35% by weight, the initial water resistance is significantly lowered.

Therefore, the content of the sodium silicate resin and the metal modified silicate resin included in the silicate resin compound used to form the concrete surface strengthening agent composition is preferably 25:75 to 65:35, more preferably It has a content ratio of 35:65 to 60:40.

The concrete surface strengthening agent of this invention contains the fine silica powder of a 2nd component. The fine silica powder is more than 99% of the silica component, the fine powder having a particle size of several to several tens of microns.

If the content of the fine silica powder included in the concrete surface reinforcing agent is less than 0.1% by weight, it is not preferable because the wear resistance auxiliary effect of the concrete is shown to be insignificant. On the other hand, when the content exceeds 5% by weight, the reinforcing agent is not preferable because fine powder particles are precipitated during storage, and the appearance of foreign matter appears. Therefore, the fine silica powder is preferably included in the concrete surface strengthening composition 0.1 to 5% by weight, more preferably 1 to 4% by weight.

The concrete surface strengthening agent of this invention contains the surface tension modifier which is a 3rd component. Examples of the surface tension modifier include polyether modified siloxane copolymers, nonionic organic surfactants, polycarbonate salt solutions, fluorine modified polyacrylates, sodium polyacrylates, and the like. These can be used individually or in mixture.

Here, if the content of the surface tension regulator included in the concrete surface reinforcing agent is less than 0.01% by weight, it is not preferable because the effect of lowering the surface tension is insufficient. On the other hand, if the content exceeds 3% by weight is not preferable because the effect of lowering the surface tension does not increase but only increases the cost. Therefore, the concrete surface strengthening agent preferably contains 0.01 to 5% by weight of the surface tension modifier, more preferably 0.1 to 2% by weight.

The concrete surface strengthening agent of the present invention includes additives which are the fourth component. Examples of the other additives include stabilizers, water repellents, disinfectants, antifoaming agents, and the like. Preferably, at least three substances are mixed and used.

Among the additives, the content of the stabilizer included in the concrete surface reinforcing agent is preferably 0.01 to 5.0% by weight, more preferably 0.05 to 2% by weight. The stabilizer is preferably a quaternary ammonium solution.

In addition, the content of the water repellent included in the concrete surface reinforcing agent in the additives is preferably 0.01 to 5.0% by weight, more preferably has a content of 0.05 to 2% by weight. The water repellent is preferably a polysiloxane emulsion.

In addition, the content of the bactericide included in the concrete surface reinforcing agent among the additives is preferably 0.01 to 2.0% by weight, more preferably has a content of 0.02 to 1% by weight. The fungicide is preferably a thiazole compound.

In addition, the content of the antifoaming agent included in the concrete surface reinforcing agent of the additives is preferably 0.01 to 3.0% by weight, more preferably has a content of 0.02 to 1.5% by weight. It is preferable to use the said polyether modified siloxane copolymer.

The concrete surface strengthening agent of the present invention includes water (H ₂ O) as the fifth component. Here, if the content of the water contained in the concrete surface reinforcement is less than 5% by weight, the viscosity of the surface reinforcement is too high to have a problem that is not suitable for performing the concrete surface treatment operation. On the other hand, the use of more than 40% by weight is not preferable because the efficiency of the surface treatment operation is not suitable. Thus, the concrete surface strengthening agent contains 5 to 40% by weight of water, preferably 15 to 35% by weight.

Concrete surface reinforcing agent formed by the above-described composition is not only good appearance condition, storage stability, surface workability and dryness of the surface reinforcement, but also can form a surface-reinforced concrete having excellent wear resistance, adhesion strength and flame resistance. .

Surface treatment method of concrete

Surface treatment method of concrete reinforced by concrete surface reinforcing agent composition, first, the silicate resin mixture containing sodium silicate resin and metal modified sodium silicate resin, 50 to 80% by weight, fine silica powder 0.1 to 5% by weight, surface tension regulator 0.01 To 5.0% by weight, stabilizer 0.01 to 5.0% by weight, water repellent 0.01 to 5.0% by weight, fungicide 0.01 to 2.0% by weight, antifoaming agent 0.01 to 3.0% by weight and 5 to 40% by weight of water to form a concrete surface strengthening agent.

Since the concrete surface reinforcing agent and its components have been described in detail above, they will be omitted to avoid duplication.

The concrete surface enhancer is then applied to the concrete plastered floor. The coating method is to spray the concrete surface reinforcement at a low pressure by using a low pressure injector, or to push it with a mechanical plastering roller to wet the concrete surface reinforcement so that it can evenly penetrate into the concrete from the concrete floor surface. At this time, the surface reinforcing agent should be kept wet for at least 20 minutes in order to sufficiently penetrate into the concrete. In addition, the coating method is preferably applied to the concrete surface in an area ratio of 5 square meters to 7 square meters per 1 L of the surface strengthening agent.

If the treatment area for the concrete floor is less than 5 square meters, the surface reinforcing agent will remain excessive even after treatment on the concrete surface, which is not preferable in terms of removal work or economical efficiency, and when it exceeds 7 square meters, the surface treatment efficiency drops drastically. It is not preferable because it is.

Therefore, the surface reinforcement treatment method of the concrete using the concrete surface reinforcement composition should be used within the area ratio of 5 square meters to 7 square meters per liter of surface reinforcing agent.

Subsequently, after at least 20 minutes have passed after the concrete surface hardener has been applied, the concrete surface hardener remaining on the concrete surface is removed. The removal method is to remove the concrete surface enhancer from the concrete surface using a tool such as a sponge. In this case, if the concrete surface enhancer is not removed, the remaining concrete surface enhancer component behaves like a silicate gel, resulting in a poor appearance.

Thereafter, the concrete surface reinforcement may be dried to complete the surface reinforcement-treated concrete flooring.

Hereinafter, the present invention will be described in detail through specific embodiments of the present invention. However, the present invention is not limited to the following examples.

Example 1

31.5 wt% sodium silicate resin and 38.5 wt% metal modified sodium silicate resin, 3.0 wt% silica fine powder, 1.0 wt% surface tension modifier (Tego Wet KL-245, Tigo), stabilizer (Betolinquart-25, welner silicate) 0.15 Weight%, 0.2% by weight of water repellent (Tego Phobe 1400, Tigo), 25.5% by weight of water to check the uniform solution condition, then disinfectant (Sky-Bio B-95, SK Chemical) 0.05% by weight, antifoaming agent (Tego Foamex 810, Tigo) 0.1% by weight of the mixture was mixed until uniform, and then filtered and packed to prepare a concrete surface reinforcement having an initial viscosity of 14 seconds (Fordcup # 4) and a solid content of 31.2% by weight.

Example 2

The same method as in Example 1, except that 31.5% by weight of the silicate resin and 38.5% by weight of the metal-modified sodium silicate resin, 35.0% by weight of the sodium silicate resin and 35.0% by weight of the metal-modified sodium silicate resin 35.0 Using weight percent, an initial viscosity of 13 seconds (Fordcup # 4) and a concrete surface strengthening agent having a solid content of 31.1 weight percent were prepared.

Example 3

The same method as in Example 1, except that 31.5% by weight of sodium silicate resin and 38.5% by weight of metal modified sodium silicate resin, 39.8% by weight of sodium silicate resin and 32.5% by weight of metal modified sodium silicate resin instead of 3.0% by weight of fine silica raw material Using 2.0 wt% of the fine silica powder, a concrete surface strengthening agent having an initial viscosity of 12 seconds (Fordcup # 4) and a solid content of 30.7 wt% was prepared.

Comparative Example 1

In the same manner as in Example 1, 31.5 wt% of sodium silicate resin and 38.5 wt% of metal modified sodium silicate resin, 32.9 wt% of sodium silicate resin and 40.1 wt% of metal modified sodium silicate resin instead of 3.0 wt% of silica fine powder Using to prepare a concrete surface reinforcement with an initial viscosity of 13 seconds (Fordcup # 4), solid content of 30.8% by weight.

Comparative Example 2

The same method as in Example 1, except that 31.5% by weight of the silicate resin and 38.5% by weight of the metal modified sodium silicate resin, 31.5% by weight of the sodium silicate resin and 38.5% by weight of the metal-modified sodium silicate resin 38.5 A concrete surface strengthening agent having an initial viscosity of 16 seconds (Fordcup # 4) and a solid content of 33.2% by weight was prepared using 2.0% by weight of fine silica powder and 6.4% by weight of organic auxiliary resin (Acronal S-559, BASF). .

Evaluation of Concrete Surface Reinforcers

Using a flooring or slat test plate finished with concrete as a material, the treated area per 1 L of the concrete surface reinforcement prepared in Examples 1-3 and Comparative Examples 1-2 of the present invention on the material was about 6 square meters. After adjusting and surface treatment, it dried at room temperature for 7 days. The resultant is used as an analytical specimen to evaluate the appearance, transparency, storage stability, surface treatment workability and dryness of concrete surface reinforcing agent, and wear loss, permeability ratio, adhesive strength and flame retardance of surface treated concrete. Was evaluated. The evaluation results are shown in Table 1 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Exterior Good Good Good usually Bad Storage stability Good Good Good Good usually Surface workability Good Good Good Good usually Dryness Good Good Good usually Bad Wear loss Good Good usually Bad usually Pitching cost Good Good Good usually Bad Adhesion strength Good Good Good Good usually Flame retardant Good Good usually usually Bad

In Table 1, each evaluation item for the concrete surface reinforcing agent and concrete is as follows.

Good: When the test result of evaluation of Table 2 is favorable.

Moderate: The test results are not good but show usable levels.

Poor: When the level is unavailable.

Test method of concrete surface hardener and surface reinforced concrete division Test Methods If good Exterior The condition of the surface strengthening agent is visually evaluated and evaluated. No foreign matter and uniform Storage stability The viscosity after storing a surface strengthening agent at 40 degreeC for 7 days is compared with an initial viscosity, and is evaluated by a viscosity increase rate. Less than 20% Surface workability After the concrete is treated with the surface strengthening agent, the surface of the concrete is observed and evaluated by an electron microscope (800 times).  Concrete surface voids are evenly filled Dryness After surface treatment, the resultant was dried for 7 days at room temperature, and then evaluated for appearance. If the appearance is dry enough without stickiness Wear loss Housing construction specification 31350-'02 If less than 4,500mg Pitching cost KS F 2451-'93 1 hour, less than 0.7 Adhesion strength KS F 4716-'02 1.5 N / mm ² or more Flame retardant The test shall be evaluated in accordance with KSF 2271-1998 [Test method for flame retardancy of exterior materials and structures of buildings]. In case of flame retardant grade 1 or higher

Referring to Table 1, it can be seen that the concrete surface reinforcing agent of the embodiments of the present invention is superior in appearance, storage stability, surface creation and drying properties compared to the comparative example. In particular, the concrete surface-treated with the concrete surface reinforcing agent of the embodiment can be seen that the reinforcement of the comparative example is less wear, excellent permeability ratio, adhesion strength and flame retardancy.

Concrete surface reinforcement composition according to the present invention as prepared by mixing an appropriate amount of fine silica fine powder, surface tension regulator, stabilizer, water repellent, bactericide, antifoaming agent, water in the sodium silicate resin and metal modified sodium silicate resin mixture, the surface, The appearance, storage stability, surface workability and dryness of the reinforcing agent are good.

Concrete surface treated with the concrete surface reinforcing agent composition of the present invention is the surface is reinforced to have excellent wear resistance, permeability ratio, adhesion strength and flame retardancy.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (12)

50 to 80% by weight of a silicate resin mixture comprising 25 to 65% by weight of sodium silicate resin and 35 to 75% by weight of aluminum modified silicate resin, Silica fine powder 0.1 to 5% by weight, 0.01 to 5.0 wt% surface tension modifier, 0.01 to 5.0 wt% stabilizer, 0.01 to 5.0 wt% water repellent, 0.01 to 2.0 wt% disinfectant, 0.01 to 3.0 wt% antifoam, and 5 to 40 wt% water. The surface tension modifier is at least one selected from the group consisting of polyether modified siloxane copolymer, nonionic organic surfactant, polycarbonate solution, fluorine modified polyacrylate, sodium polyacrylate, and the stabilizer is quaternary ammonium Solution, wherein the water repellent is a polysiloxane emulsion, the fungicide is a thiazole compound, and the antifoaming agent is a polyether modified siloxane copolymer. The concrete surface strengthening agent of claim 1, wherein the sodium silicate resin has a molar ratio of SiO ₂ to Na ₂ O of 3.2 to 4.5 and a solid content of 30 to 40 wt%. The concrete surface of claim 1, wherein a molar ratio of SiO ₂ to Na ₂ O of the aluminum modified sodium silicate resin is in a range of 3.2 to 4.5, and a solid content is in a range of 30 to 40 wt%. Strengthening agent. delete delete delete delete 50 to 80% by weight of silicate resin mixture, 25 to 65% by weight of sodium silicate resin and 35 to 75% by weight of aluminum modified silicate resin, 0.1 to 5% by weight of fine silica powder, 0.01 to 5.0% by weight of surface tension regulator, and 0.01 to 5.0% of stabilizer Forming a concrete surface strengthening agent comprising 5.0 wt%, 0.01 to 5.0 wt% water repellent, 0.01 to 2.0 wt% disinfectant, 0.01 to 3.0 wt% antifoam, and 5 to 40 wt% water; Applying the concrete surface reinforcing agent to the concrete surface plastered on the floor; Removing the concrete surface enhancer remaining on the concrete surface; And Drying the concrete to form a concrete having a reinforced surface, wherein the surface tension modifier is a polyether modified siloxane copolymer, a nonionic organic surfactant, a polycarbonate solution, a fluorine modified polyacrylate, sodium At least one selected from the group consisting of polyacrylates, the stabilizer is a quaternary ammonium solution, the water repellent is a polysiloxane emulsion, the fungicide is a thiazole compound, and the antifoam is a polyether-modified siloxane copolymer. Method of surface treatment of concrete. 9. The method of claim 8, wherein the surface treatment uses 1 L of concrete surface reinforcing agent per 5 to 7 square meters of concrete. The surface treatment of concrete according to claim 8, wherein the sodium silicate resin has a molar ratio of SiO ₂ to Na ₂ O of 3.2 to 4.5 and a solid content of 30 to 40 wt%. Way. The method of claim 8, wherein the metal-modified sodium silicate resin has a molar ratio of SiO ₂ and Na ₂ O (Molecular Ratio) is in the range of 3.2 to 4.5, the solid content of 30 to 40% by weight of the concrete Surface treatment method. delete