KR102099669B1 - A repair method used with Organic and Inorganic Grout Material for Water leaks and Oil leaks on Concrete construction - Google Patents

Abstract

The present invention provides a water leak and oil leak repair method by the rear injection of a concrete structure, wherein an inorganic rear injection material includes 5 to 75 wt% of ultrafine cement, 0.1 to 20 wt% of silica fume, 0.1 to 20 wt% of fly ash, 0.1 to 20 wt% of tricalcium aluminate cement, 0.01 to 20 wt% of magnesia, and the like, and an organic rear injection material includes 30 to 95 wt% of a styrene-methyl methacrylate-butadiene copolymer, 0.1 to 25 wt% of a polyether-ether ketone copolymer, 0.01 to 15 wt% of furfuryl alcohol, and the like. The present invention provides an effect of effectively blocking the inflow and outflow, of the concrete structure, of oil and fat such as water and asphalt solution.

Description

{A repair method used with Organic and Inorganic Grout Material for Water leaks and Oil leaks on Concrete construction}

The present invention relates to water leakage and oil leakage repairing methods for concrete structure back injection using organic and inorganic injection materials.

In general, in order to repair water leakage through cracks, water-soluble urethane, water-soluble epoxy, etc., and water-soluble organic synthetic polymer resin-based water repellent materials or water-soluble rubber admixtures such as acrylic, EVA, and SBR are added to cement. An inorganic water-based material, or an organic compound such as asphalt, urethane, and epoxy resin containing bentonite mineral particles having the characteristic of increasing the volume by reacting with water, or an inorganic material in which water-soluble rubber admixtures such as acrylic, EVA, and SBR are added to cement The method of hardening, foaming, or swelling by using the water-injection material added to the mixture to the back of the concrete structure is used.

However, when the organic synthetic polymer resin-based water-repellent material having reactivity with water, such as the water-foaming urethane and water-soluble epoxy, is forcibly injected into the back surface of the concrete structure, initially it exhibits an excellent index effect by foaming or curing. The exponential effect gradually decreases due to the amount of inclusion or its solubility and its volume contraction. That is, long-term durability is lacking, and in particular, in the case of such an organic synthetic polymer product, the resistance to alkali is generally poor, and concrete by strong alkaline solution such as sodium hydroxide, calcium hydroxide, potassium hydroxide of concrete dissolved in water A problem has been pointed out that a dropping phenomenon occurs at the interface adhering to the surface and leaks again within a short period of time.

In addition, the inorganic water-based material, in which water-soluble rubber admixtures such as acrylic, EVA, SBR, etc. are added to cement, has low adhesion to a concrete structure, and when more than the amount required for curing is injected into the concrete back surface, before curing It is already dissolved in water and does not exhibit its strength properly. In addition, even if it is sufficiently hardened to exert its strength, brittleness is excessive and cracks occur only if there is a slight deformation in the concrete structure, or cracks are caused by dry shrinkage, and defects leaking through these parts are pointed out.

In addition, the index of adding bentonite mineral particles with the characteristic of increasing the volume when reacting with water to organic compounds such as asphalt, urethane, and epoxy resins, or inorganic mixtures containing water-soluble rubber admixtures such as acrylic, EVA, and SBR in cement. A method of forcibly injecting ash into the back of a concrete structure is also used. However, due to the nature of the organic compound that blocks the water surrounding the surface of the bentonite mineral particles, the volumetric expandability of the bentonite mineral particles is not sufficiently utilized, and also, an inorganic mixture in which a water-soluble rubber admixture such as acrylic, EVA, SBR, etc. is added to cement. In the case of using bentonite mineral particles in a mixture, water is mixed before forced injection into the rear surface of the concrete structure. At this time, bentonite mineral particles have already absorbed water to increase the volume, so sufficient injection is not possible and the back voids cannot be filled. A defect occurs that cannot be filled and leaks again in a short period of time.

On the other hand, in the case of a water-swellable index material mainly composed of acrylic acid, acrylate, or acrylamide, it is widely known as a material capable of overcoming the problems of the conventional concrete structure back injection materials, but it is caused by mold or groundwater. Serious questions have been raised about durability such as loss and dissolution or decomposition. Conventional techniques for overcoming the above disadvantages, for example, Japanese Patent Application Publication No. 10-324551, Japanese Patent Application Publication No. Hei 6-1886, Japanese Patent Application Publication No. 5-70762, etc. The method of overcoming this is proposed by suggesting the method of.

However, it does not have excellent durability as compared with conventional materials, and thus has poor anti-fungal, salt-resistant, or freeze-thaw resistance, particularly lack of swelling / shrinking repeatability in sections where wet / drying is repeated, and excessive water Problems such as loss of decomposition due to a decrease in the bonding force between acrylic acid, acrylate, or acrylamide molecules due to inclusion have not been solved.

On the other hand, the conventional repair method using the various types of concrete structure back injection repair material, that is, along the cracks or leaks, drill a hole through the concrete structure or a waterproof layer pre-installed on the back of the structure with a concrete drill, and then open When the pressure of the injection device is set to the maximum and forced injection is performed by inserting a packer or pipe for injecting the back injection repair material into the inlet, the injection can hardly be checked depending on the state of the back space of the concrete structure that cannot be checked, and the expression of the repair effect is uncertain. On the contrary, there is a problem that the construction cost can be rapidly increased due to infinite injection.

Republic of Korea Patent Publication No. 10-2003-0044650

The present invention is to solve the above problems of the prior art,

Mixing the inorganic back repair material and the organic back repair material on the back of the concrete structure to form a solid single film, or by layering the coating layer of the dual structure of the inorganic back repair film and the organic back repair film to form a layer of water, asphalt, etc. It is an object of the present invention to provide a method for repairing leaks and leaks in the back of a concrete structure that can block inflow and outflow of the concrete structure.

In addition, by accurately injecting the inorganic back repair material and the organic back repair material into the target injection location, contamination or leakage defects due to oil or fat, such as asphalt melts flowing through the cracks of the concrete structure, groundwater or rainwater, or in the storage It is to provide a leak-injection and oil-repairing repair method for a concrete structure that can quickly and accurately repair soil pollution caused by spillage of oil and fat, such as asphalt solution.

In order to solve the above technical problem,

The present invention is (a) injection position determining step of determining the injection position according to the presence or absence of cracks, crevices, leak marks and waterproof layer of the concrete structure in which leak defects are occurring; (B) a hole opening step of opening a hole penetrating to the waterproof layer or the ground layer of the concrete structure according to the determination of the injection position; (c) an inlet installation step of installing an inlet having a single tube or a double tube in the opened hole; (d) a sealing step of suturing the site where the leakage defect of the concrete structure occurs; (e) generating a back injection material; (f) an injection step of forcibly injecting the back injection material by a pump through a single pipe injection port or a double pipe injection port; And (g) a sealing step of removing the inlet and sealing it;

The back injection material is mixed with (1) an inorganic back injection material and (2) an organic back injection material to form a single repair layer, or (1) an inorganic back injection material is first injected and cured, followed by (2) an organic back injection material. To form a two-layer repair layer,

The (1) inorganic back injection material is 5 to 75% by weight of ultrafine cement having a size of 30㎛ to 100㎛, 0.1 to 20% by weight of silica fume, 0.1 to 20% by weight of fly ash, 0.1 to 20% by weight of tricalcium aluminate cement , Magnesia 0.01 to 20% by weight, gypsum 0.01 to 20% by weight, boroncarbite 0.01 to 10% by weight, silicon nitride 0.01 to 10% by weight, zirconia 0.01 to 10% by weight, sialon 0.01 to 10% by weight, lithium carbonate 0.01 to 10% by weight %, 0.01 to 10% by weight of calcium sulfite and 0.01 to 10% by weight of duralumin,

The (2) organic back injection material is styrene-methyl methacrylate-butadiene copolymer 30 to 95% by weight, polyether-ether ketone copolymer 0.1 to 25% by weight, furfuryl alcohol 0.01 to 15% by weight, N-β ( Aminoethyl) γ-aminopropyl trimethoxysilane 0.01 to 15% by weight, vinyl acetate-dimethyl maleate 0.01 to 15% by weight, water reducing agent 0.01 to 10% by weight and antifoaming agent characterized in that it comprises 0.01 to 10% by weight Provides leak-injection and leak-repairing methods for concrete structures.

The concrete structure back injection leak and oil leakage repair method of the present invention mixes the inorganic back repair material and the organic back repair material on the back of the concrete structure to form a solid single film, or laminates a double-layered film layer of the inorganic back repair film and the organic back repair film By forming, it provides the effect of effectively blocking the inflow and outflow of concrete components such as water, asphalt solution, etc. inside the concrete structure.

In addition, by accurately injecting the inorganic back repair material and the organic back repair material into the target injection location, contamination or leakage defects due to oil or fat, such as asphalt melts flowing through the cracks of the concrete structure, groundwater or rainwater, or in the storage It provides the effect of quickly and accurately repairing soil pollution due to the spillage of fats and oils, etc.

1 is an exemplary view showing a repair process according to the present invention,
Figure 2 is an exemplary view showing the opening state of the back injection material injection hole according to the present invention,
Figure 3 is an exemplary view showing the opening degree of the back injection material injection hole according to the present invention.

The present invention is (a) injection position determining step of determining the injection position according to the presence or absence of cracks, crevices, leak marks and waterproof layer of the concrete structure in which leak defects are occurring; (B) a hole opening step of opening a hole penetrating to the waterproof layer or the ground layer of the concrete structure according to the determination of the injection position; (c) an inlet installation step of installing an inlet having a single tube or a double tube in the opened hole; (d) a sealing step of suturing the site where the leakage defect of the concrete structure occurs; (e) generating a back injection material; (f) an injection step of forcibly injecting the back injection material by a pump through a single pipe injection port or a double pipe injection port; And (g) a sealing step of removing the inlet and sealing it;

The back injection material is mixed with (1) an inorganic back injection material and (2) an organic back injection material to form a single repair layer, or (1) an inorganic back injection material is first injected and cured, followed by (2) an organic back injection material. To form a two-layer repair layer,

The (1) inorganic back injection material is 5 to 75% by weight of ultrafine cement having a size of 30㎛ to 100㎛, 0.1 to 20% by weight of silica fume, 0.1 to 20% by weight of fly ash, 0.1 to 20% by weight of tricalcium aluminate cement , Magnesia 0.01 to 20% by weight, gypsum 0.01 to 20% by weight, boroncarbite 0.01 to 10% by weight, silicon nitride 0.01 to 10% by weight, zirconia 0.01 to 10% by weight, sialon 0.01 to 10% by weight, lithium carbonate 0.01 to 10% by weight %, 0.01 to 10% by weight of calcium sulfite and 0.01 to 10% by weight of duralumin,

The (2) organic back injection material is styrene-methyl methacrylate-butadiene copolymer 30 to 95% by weight, polyether-ether ketone copolymer 0.1 to 25% by weight, furfuryl alcohol 0.01 to 15% by weight, N-β ( Aminoethyl) γ-aminopropyl trimethoxysilane 0.01 to 15% by weight, vinyl acetate-dimethyl maleate 0.01 to 15% by weight, water reducing agent 0.01 to 10% by weight and antifoaming agent characterized in that it comprises 0.01 to 10% by weight It is related to the leakage injection and leakage repair method of the concrete structure.

In the case where (1) an inorganic back injection material and (2) an organic back injection material are used in combination, it is preferable to mix and use them in a weight ratio of 2 to 8: 1.

It will be described below with reference to the drawings. 1 is an exemplary view showing a repair process of forming a two-layer repair layer by injecting (1) an inorganic back injection material first and curing it, and then (2) injecting an organic back injection material, and FIG. 2 shows a back repair material according to the present invention It is an exemplary view showing the opening state of the injection hole, and FIG. 3 is an exemplary view showing the opening degree of the injection hole of the rear repair material according to the present invention.

The repair method of forming the repair layer of the second layer by injecting (1) the inorganic back injection material of the present invention first and curing it, and then (2) injecting the organic back injection material, for example, the concrete structure 10 or the waterproof layer 20 A first opening step of opening the inorganic back repair material injection hole 30 along both sides of the crack portion 11 to penetrate the hole; An inorganic back repair material injection step of forcibly filling and filling an inorganic back repair material 40 into the rear gap of the concrete structure 10 through the inorganic back repair material injection hole 30; A curing step of allowing the inorganic back repair material 40 to form an inorganic film 50 made of an inorganic hardening body by standing for at least 5 hours after the inorganic back repair material injection step; After the curing step, to penetrate the concrete structure 10 and the inorganic film 50 or the concrete structure 10 and the inorganic film 50 and the waterproof layer 20, the inorganic back repair material injection hole 30 and adjacent to it A second opening step of opening the organic back repair material injection hole 60 at an intermediate position of another inorganic back repair material injection hole 30; An organic back repair material injection step of forcibly injecting the organic back repair material 70 to the outside of the inorganic film 50 through the organic back repair material injection hole 60 to form an organic film 80 made of an organic elastic gel; Sealing step of sealing the organic back repair material injection hole 70, the inorganic back repair material injection hole 30, and the crack 11 with an aqueous sealant 90; through the inorganic structure 50 and the rear surface of the concrete structure , It can be carried out as a process of forming a separate dual-layer coating layer of the organic coating (80).

In addition, the back repair method of forming a single repair layer by mixing (1) an inorganic back injection material and (2) an organic back injection material to form a single repair layer may be omitted by omitting the second opening step. If the single repair layer is to be constructed twice, a second opening is performed according to the second opening step, and (1) a back repair material mixed with an inorganic back injection material and (2) an organic back injection material is injected once more Can be carried out.

The first opening step determines the injection location of the inorganic back repair material 40 according to the presence or absence of cracks, crevices, leak marks and waterproof layers in the concrete structure in which oil or asphalt solution, etc. In accordance with the determination of the injection position, the rear gap between the concrete structure, that is, between the concrete structure 10 and the waterproof layer 20, between the waterproof layer 20 and the protective pressing layer 110 or the ground layer 100 of the concrete structure inorganic back repair material In order to inject (40), the water-repellent layer of the concrete structure, the inorganic back repair material injection hole 30 penetrating to the back structural layer or the ground layer are opened in a line.

Figure 2 shows an exemplary view showing the opening state of the rear repair material injection hole according to the present invention, for example, cracks or expansion joints (ExP. J), construction joints (Construction J.), or concrete structures using a concrete drill with a diameter of 5 to 50 mm at 0.5M to 2.0M intervals along the oil leakage traces such as the asphalt solution The water-repellent layer 20 on the back surface or the back repair material injection hole 30 penetrating the ground layer 100 is opened in a line.

That is, cracks in which oil leakage leakages such as the asphalt dissolving solution occur, or gaps such as expansion joints (ExP.J), structural joints (Construction J.), or oil leakage such as the asphalt dissolving solution Watertight layer 20 on the back of the concrete structure using a concrete drill with a diameter of 5 to 50 mm depending on the depth of injection, and at intervals of 0.5 M when there is a large amount of leakage along the trail, and at intervals of 2.0 M when the amount of leakage is small. However, the inorganic back repair material injection hole 30 penetrating the protective pressing layer 110 or the ground layer 100 is opened in a line.

At this time, the injection location of the rear repair material is determined according to the characteristics of the concrete structure, the presence or absence of a waterproof layer, and the type. That is, in determining the proper injection position of the back repair material 40, it is important to determine whether or not to use the existing waterproof layer, and the waterproof layer of the structure within 15 years of age is almost recyclable except for some leaking parts. . For example, in the case of a sheet waterproofing material having poor adhesion, it is possible to maximize the effect by injecting an injection material under the waterproof layer, and in the case of a waterproof coating layer having excellent adhesion, injecting the injection material on the surface of the waterproof layer. Of course, if there is no existing waterproof layer or protective pressing layer, it is necessary to inject the injection material into the gap between the back of the structure and the ground. Therefore, selection of the injection location of the back repair material is essential for maximizing the repair effect, and of course, it is necessary to check the structure characteristics, the presence or absence of a waterproof layer, and accordingly, as shown in FIGS. 2 and 3, The injection position is determined.

Figure 3 shows an exemplary view showing the opening degree of the back repair material injection hole according to the present invention, Figure 3 (a) is a back repair material injection hole so that the inorganic back repair material 40 is injected under the existing waterproof layer 20 (30) is opened, and the existing waterproof layer is applied when the adhesive strength such as the sheet waterproof layer is not good, and FIG. 3 (b) shows the rear repair material injection hole (Fig. 3) so that the inorganic back repair material 40 is injected over the existing waterproof layer 20. 30), which is applied when the existing waterproof layer has good adhesion, such as a waterproof layer, and FIG. 3 (c) penetrates the existing waterproof layer 20 and the protective pressing layer 110 to the ground surface 60 to provide an inorganic back repair material (10) The hole for opening the back repair material to be injected is opened. It can be applied when the existing waterproof layer is completely destroyed or there is no waterproof layer or protective pressing layer in the first place.

In the back repair material injection step, an inlet 120 is installed in the opened back repair material injection hole 30, and the back repair material 40 is forcibly injected into the gap between the concrete structure and the back structure through the inlet 120. The back repair material injected in this way is mostly filled between the concrete structure and the existing waterproof layer or the ground.

The inlet 120 is installed by hitting or tightening a single tube inlet such as a packer or pipe having a length of about 10 to 1,000 with a hammer or the like into the opened back repair material injection hole. Since the installation of the injection port as described above is a known technique, detailed description thereof will be omitted.

The inorganic back injection material is 5 to 75% by weight of ultrafine cement having a size of 30㎛ to 100㎛, 0.1 to 20% by weight of silica fume, 0.1 to 20% by weight of fly ash, 0.1 to 20% by weight of tri calcium aluminate cement, 0.01 of magnesia To 20 wt%, gypsum 0.01 to 20 wt%, boroncarbite 0.01 to 10 wt%, silicon nitride 0.01 to 10 wt%, zirconia 0.01 to 10 wt%, sialon 0.01 to 10 wt%, lithium carbonate 0.01 to 10 wt%, sulfite It may include 0.01 to 10% by weight of calcium and 0.01 to 10% by weight of duralumin.

The ultra-fine cement is preferably used as specified in KS, and is preferably contained in an amount of 5 to 75% by weight based on the total weight of the inorganic back injection material. The ultrafine cement preferably has a powderiness of 3,000 to 5,000 cm 2 / g.

The silica fume is a pozzolanic material and is used to improve long-term strength and durability by a pozzolanic reaction. The silica fume is preferably contained in 0.1 to 20% by weight relative to the total weight of the inorganic back injection material. When the content of the silica fume is less than 0.1% by weight, the effect of improving the strength of the repair layer and improving durability may be weak, and when the content of the silica fume exceeds 20% by weight, early strength development is delayed, workability is poor, and It is not economical because manufacturing cost is high.

The fly ash is coal ash from a thermal power plant, and has pozzolanic properties, and is used to improve long-term strength and durability. The fly ash is preferably contained in 0.1 to 20% by weight relative to the total weight of the inorganic back injection material. When the content of the fly ash is less than 0.1% by weight, the effect of improving the strength and durability of the repair layer may be weak, and when the content of the fly ash exceeds 20% by weight, early strength development is delayed and workability is poor. And the manufacturing cost is high, which is not economical.

The tricalcium aluminate cement is used to improve the early strength development, shrinkage reduction and chemical resistance of the repair layer. The tri calcium aluminate cement is preferably contained in 0.1 to 20% by weight relative to the total weight of the inorganic back injection material. When the content of the tricalcium aluminate cement exceeds 20% by weight, the curing time is shortened and the pot life is reduced. If the content is less than 0.1% by weight, the effect of early strength development and shrinkage reduction is reduced.

The magnesia is used to obtain initial strength expression, corrosion resistance, fire resistance and abrasion resistance. The magnesia is preferably contained in an amount of 0.01 to 20% by weight relative to the total weight of the inorganic back injection material. If the content of magnesia is less than 0.01% by weight, the performance improvement effect is insufficient, and if the content exceeds 20% by weight, initial strength expression may be deteriorated.

The gypsum is used for initial strength development and prevention of shrinkage. The gypsum is used to prevent cracking of concrete and shrinkage of the repair layer by compacting the tissue. The gypsum is preferably contained in an amount of 0.01 to 20% by weight relative to the total weight of the inorganic back injection material. If the content of the gypsum is less than 0.01% by weight relative to the total weight of the inorganic back injection material, the strength of the repair layer and the effect of suppressing cracking may be weak, and when the content of the gypsum exceeds 20% by weight, due to rapid curing properties Good physical properties can be obtained, but over-expansion and water resistance decrease.

The boron carbide is used to improve strength, wear resistance, and corrosion resistance. The boron carbide is preferably contained in an amount of 0.01 to 10% by weight based on the total weight of the inorganic back injection material. If the content of the boron carbide is less than 0.01% by weight, the effect of improving performance may be insufficient, and when the content of the boron carbide is more than 10% by weight, workability is lowered and price competitiveness decreases.

The silicon nitride is used for strength, abrasion resistance, and shrinkage prevention of the repair layer. The silicon nitride is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the inorganic back injection material. When the content of the silicon nitride is less than 0.01% by weight relative to the total weight of the inorganic back injection material, strength, abrasion resistance, and crack generation inhibitory effects may be weak, and when the content of the silicon nitride exceeds 10% by weight, due to rapid curing properties Good physical properties can be obtained, but the manufacturing cost is high, which is not economical.

The zirconia is prepared by dispersing zirconia with alumina or silicon nitride, and is used to increase the toughness, corrosion resistance, abrasion resistance and heat resistance of the repair layer. The zirconia is preferably contained in 0.01 to 10% by weight relative to the total weight of the inorganic back injection material. If the content of the zirconia is less than 0.01% by weight, the effect of improving the performance is insufficient, and when the content of the zirconia exceeds 10% by weight, the performance is improved, but price competitiveness is lowered.

The sialon is a compound in which alumina is substituted and dissolved in silicon nitride, and is used to improve strength, corrosion resistance, and wear resistance. The sialon is preferably contained in an amount of 0.01 to 10% by weight based on the total weight of the inorganic back injection material. When the weight ratio of the sialon increases, it shows strength and abrasion resistance. When the content of the sialon is less than 0.01% by weight, the effect of improving strength and chemical resistance may be weak, and when the content of the sialon exceeds 10% by weight There is no further improvement in performance, and the manufacturing cost is high, which is not economical.

The lithium carbonate is used to control the initial curing rate. The lithium carbonate is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the inorganic back injection material. When the content of the lithium carbonate is less than 0.01% by weight, the initial strength expression is delayed, and when the content of the lithium carbonate exceeds 10% by weight, reactivity becomes high, thereby reducing workability and lowering price competitiveness.

The calcium sulfite is used to improve the waterproofing, anti-rust and shrinkage reduction effect. The calcium sulfite is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the inorganic back injection material. When the content of the calcium sulfite is less than 0.01% by weight, the effect of improving performance may be deteriorated, and when the content of the calcium sulfite exceeds 10% by weight, workability is reduced and price competitiveness is reduced.

The duralumin is used to obtain an effect of improving strength expression, wear resistance and scaling resistance. The duralumin is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the inorganic back injection material. If the content of the duralumin is less than 0.01% by weight, the effect of improving strength development, abrasion resistance and scaling resistance is insufficient, and when the content of the duralumin exceeds 10% by weight, workability deteriorates and economic efficiency decreases.

The inorganic back injection material may further include 0.1 to 5% by weight of the copolymer represented by Formula 1 below.

[Formula 1]

In the above formula, a and b are molar ratios, and a + b = 1.

Since the copolymer represented by Chemical Formula 1 has water repellency by an alkyl group substituted with fluorine, it performs a function of suppressing water penetration after repair and reinforcement. In addition, by including a catechol group has excellent bonding strength, it has the characteristics of being well bonded to concrete structures.

The copolymer may have a weight average molecular weight of 3,000 to 100,000, and more preferably 5,000 to 30,000.

The inorganic back injection material may further include lithium magnesium sodium silicate. The lithium magnesium sodium silicate is used to improve reactivity and improve initial strength expression and water resistance. The lithium magnesium sodium silicate is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the inorganic back injection material. When the content of the lithium magnesium sodium silicate is less than 0.01% by weight, the performance improvement effect may be weak, and when the content of the lithium magnesium sodium silicate exceeds 10% by weight, the performance improvement effect is excellent, but the workability and price competitiveness are excellent. Falls.

The inorganic back injection material may further include a re-emulsifying powder resin to improve strength, durability, and material separation prevention. As the re-emulsifiable powder resin, it is preferable to use a mixture of any one or more of polyethylene vinyl acetate, styrene-methylmethacrylate and methylmethacrylate-butylacrylate. The re-emulsifying powder resin is preferably contained in an amount of 0.01 to 10% by weight based on the total weight of the inorganic back injection material. When the content of the re-emulsifiable powder resin is less than 0.01% by weight, the effect of improving performance may be weak, and when the content of the re-emulsifiable powder resin exceeds 10% by weight, viscosity increases and workability deteriorates and initial strength development occurs. Falls.

The inorganic back injection material may further include a water reducing agent. The water reducing agent is used to improve the strength and durability by reducing the water-cement ratio. The water reducing agent may be a polycarboxylic acid-based, melamine-based, or naphthalene-based water-reducing agent. The water reducing agent is excellent in the effect of improving strength and durability, and it is preferable to use a naphthalene-based water reducing agent having an excellent effect of reducing the water-cement ratio, and is preferably contained in an amount of 0.001 to 5% by weight based on the total weight of the inorganic back injection material. .

The inorganic back injection material may further include a retarding agent. The retarder can be used to secure workability for a period of time and delay rapid curing. The retarder is preferably contained in an amount of 0.01 to 5% by weight relative to the total weight of the inorganic back injection material. As the retarder, a well-known substance may be used, for example, sugars such as glucose, glucose, textrin, and dextran, gluconic acid, malic acid, citric acid, acids such as citric acid, or salts thereof, aminocarboxylic acids Alternatively, salts thereof, phosphonic acid or derivatives thereof, polyalcohols such as glycerin, and the like can be used.

The inorganic back injection material may further include an organic copper compound represented by Formula 2 below in 0.1 to 3% by weight.

[Formula 2]

The compound of Formula 2 performs a function of fixing chlorine ions penetrating into the concrete structure by including copper ions. The compound of Formula 2 has a very good fixing ability of chlorine ions.

The compound of Formula 2 may be prepared, for example, by reacting a lithium ditrimethylsilaneamido compound with copper iodide under hexane water.

The compound of Formula 2 can be obtained, for example, by reacting lithium hexamethyldisilazide (silazide) with copper iodide (I), and the lithium hexamethylsilazide (silazide) is hexamethyldisilazane and n- It can be obtained by reacting butyl lithium in hexane. However, it is not limited thereto, and can be easily obtained by a method known in this field (http://reag.paperplane.io/00000722.htm)

The organic back injection material is styrene-methyl methacrylate-butadiene copolymer 30 to 95% by weight, polyether-ether ketone copolymer 0.1 to 25% by weight, furfuryl alcohol 0.01 to 15% by weight, N-β (aminoethyl) It may include 0.01 to 15% by weight of γ-aminopropyl trimethoxysilane, 0.01 to 15% by weight of a vinyl acetate-dimethyl acrylate copolymer, 0.01 to 10% by weight of a water reducing agent, and 0.01 to 10% by weight of an antifoaming agent.

The styrene-methylmethacrylate-butadiene copolymer is used to improve the bonding strength and durability. The styrene-methylmethacrylate-butadiene copolymer is preferably contained in an amount of 30 to 95% by weight based on the total weight of the organic back injection material. When the content of the styrene-methylmethacrylate-butadiene copolymer exceeds 95% by weight, workability is improved, but initial strength expression may be lowered, and the content of the styrene-methylmethacrylate-butadiene copolymer is 30% by weight. If it is less than%, the initial strength of concrete is improved, but workability is significantly reduced.

The styrene-methyl methacrylate-butadiene copolymer may be prepared by polymerizing a styrene monomer, a methyl methacrylate monomer, and a butadiene monomer in a molar ratio of 0.1 to 0.5: 0.1 to 0.5: 0.1 to 0.5, and the weight average molecular weight is 500,000 To 3,000,000 can be used. The styrene-methylmethacrylate-butadiene copolymer may be prepared directly or purchased commercially.

The polyether-etherketone copolymer is used to improve toughness, adhesion strength, abrasion resistance and durability. The polyether-ether ketone copolymer is preferably contained in an amount of 0.1 to 25% by weight based on the total weight of the organic back injection material. When the content of the polyether-ether ketone copolymer exceeds 25% by weight, the performance is improved, but the viscosity is high and the workability (slump) may decrease, and the content of the polyether-etherketone copolymer is less than 0.1% by weight. Back side toughness, adhesion strength and durability improvement effect may be weak.

The polyether-ether ketone copolymer may have a weight average molecular weight of 50,000 to 3,000,000. The polyether-etherketone copolymer may be prepared directly or commercially available.

The furfuryl alcohol is used to improve adhesion strength, chemical resistance, abrasion resistance and heat resistance. The furfuryl alcohol is preferably contained in an amount of 0.01 to 15% by weight relative to the total weight of the organic back injection material. When the content of the furfuryl alcohol exceeds 15% by weight, performance may be improved, but price competitiveness may decrease. If the content of furfuryl alcohol is less than 0.01% by weight, the effect of improving strength and durability may be weak.

The N-β (aminoethyl) γ-aminopropyltrimethoxysilane is used to improve the reactivity of the organic back injection material to improve strength and durability. The N-β (aminoethyl) γ-aminopropyl trimethoxysilane is preferably contained in an amount of 0.01 to 15% by weight based on the total weight of the organic back injection material. When the content of the N-β (aminoethyl) γ-aminopropyl trimethoxysilane exceeds 15% by weight, the effect of improving strength and durability is no longer expressed and the price competitiveness may be lowered, and the N-β (amino If the content of ethyl) γ-aminopropyltrimethoxysilane is less than 0.01% by weight, the effect of improving strength and durability may be insufficient.

The vinyl acetate-dimethyl maleate copolymer is used to improve workability, strength and durability. The vinyl acetate-dimethyl maleate copolymer is preferably contained in an amount of 0.01 to 15% by weight relative to the total weight of the organic back injection material. When the content of the vinyl acetate-dimethyl maleate copolymer is less than 0.01% by weight, the performance improvement effect is lowered, and when the content exceeds 15% by weight, strength and durability are improved, but the viscosity is lowered and material separation is likely to occur.

The water reducing agent improves strength and durability by reducing the water-cement ratio, and at the same time serves to improve initial workability by delaying the hydration reaction of the crude steel cement. The water reducing agent is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the organic back injection material. As the water reducing agent, a polycarboxylic acid-based water reducing agent can be preferably used.

The anti-foaming agent is used to lower the amount of air and lower the voids to improve strength and durability. The antifoaming agent is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the organic back injection material. As the water reducing agent, a silicone-based water reducing agent can be preferably used.

The organic back injection material of the present invention may further include 3 to 15% by weight of a copolymer represented by the following Chemical Formula 3:

[Formula 3]

In the above formula, R1 and R2 are hydrogen or a methyl group,

a, b, c and d are mole fractions, a is 0.1 to 0.5, b is 0.1 to 0.5, c is 0.1 to 0.5, d is 0.1 to 0.5, and a + b + c + d = 1.

The copolymer represented by Chemical Formula 3 includes a catechol group and a methoxysilane group, a rubber group, and is characterized by including a 2-octyl cyanoacrylate monomer.

The catechol group is a functional group that adheres well to both organic and inorganic components. Therefore, the catechol group is well combined with organic and inorganic materials, and functions to improve the strength and bonding strength of the bonding material. In addition, the silane group is a functional group that adheres well to both organic and inorganic components. Therefore, the catechol group and the silane group improve the strength and durability of the organic back injection material, and can be well combined with the inorganic back injection material. In addition, the rubber group provides soft physical properties and improves water resistance, and the 2-octyl cyanoacrylate monomer performs a function of enhancing bonding strength with other components.

The copolymer represented by Chemical Formula 3 may have a weight average molecular weight of 50,000 to 5,000,000, more preferably 100,000 to 300,000.

The organic back injection material may further include 1 to 5% by weight of a cationic polymer surfactant represented by the following Chemical Formula 4:

 [Formula 4]

In the above formula, a and b are molar ratios, and a + b = 1.

The cationic polymer surfactant of Chemical Formula 4 may be preferably used having a weight average molecular weight of 100,000 to 150,000.

Among the cationic polymer surfactants of Formula 4, the catechol group is a natural component and provides adhesion to both organic and inorganic materials without side effects, and the cationic surfactant grafted on the main chain functions to mix inorganic and organic components well. Perform.

In addition, the organic back injection material may further include ethylenebisstearic acid amide. The ethylenebisstearic amide is used to improve strength and water resistance. The ethylenebisstearic acid amide is preferably contained in an amount of 0.01 to 10% by weight based on the total weight of the organic back injection material. When the content of the ethylenebisstearic acid amide exceeds 10% by weight, the performance is improved, but the viscosity can be increased and the workability can be lowered. When the content of the ethylenebisstearic acid amide is less than 0.01% by weight, the performance improvement effect may be weak. .

In addition, the organic back injection material may further include 2,2'-methylenebis (4-methyl-6-tert-butylphenol) (2-2'-methylenebis (4-methyl-6-tert-butylphenol)). have. The 2,2'-methylenebis (4-methyl-6-tert-butylphenol) is used to improve toughness, heat resistance, and weather resistance. The 2,2'-methylenebis (4-methyl-6-tert-butylphenol) is preferably contained in an amount of 0.01 to 10% by weight relative to the total weight of the organic back injection material, the 2,2'-methylenebis ( If the content of 4-methyl-6-tert-butylphenol) exceeds 10% by weight, the performance is improved, but the workability is lowered, and the 2,2'-methylenebis (4-methyl-6-tert-butylphenol) If the content is less than 0.01% by weight, the effect of improving performance is insufficient.

In the present invention, the sealing step of sealing the portion where the leakage defect of the concrete structure is generated includes (1) an inorganic back injection material; (2) organic back injection material; Or it can be carried out by a method of sealing by mixing (1) an inorganic back injection material and (2) an organic back injection material.

The (g) sealing step of removing the inlet and sealing it is the (2) organic back injection material; Alternatively, (1) an inorganic back injection material and (2) an organic back injection material may be used by mixing, or may be performed using a sealant commonly used in this field.

Hereinafter, embodiments of the performance improving polymer cement concrete composition according to the present invention are presented in more detail, and the present invention is not limited by the following examples.

Preparation Example 1 Synthesis of Copolymer of Formula 1

First, 2- (Perfluorohexyl) ethyl methacrylate (CAS 2144-53-8) and dopamine methacrylamide were added in a molar ratio of 1: 1 in a four-necked flask equipped with a reflux cooling tube, a nitrogen introduction tube, a thermometer, and a stirring device. After addition, PGMEA was added and heated to 70 ° C., followed by stirring under a nitrogen stream for 30 minutes. To this, 1.3 parts by weight of 2,2'-azobisisobutyronitrile (abbreviated as AIBN) was added to 100 parts by weight of the total monomers, followed by polymerization for 18 hours. It was confirmed that the conversion ratio was 95% or more by analyzing the α-Cl monomer remaining in the reaction solution by gas chromatography. The obtained reaction solution was precipitated with hexane and dried in vacuo to isolate the copolymer. As a result of measuring the molecular weight of the obtained copolymer by GPC, the weight average molecular weight was 25,000.

[Formula 1]

In the above formula, a and b are molar ratios, and a = 0.5 and b = 0.5.

Preparation Example 2: Preparation of copolymer of formula (3)

1,3-butadiene, dopamine methacrylamide, 3- (trimethoxysilyl) propyl methacrylate, and 2-octylcyanoacryl in ethylbenzene, which is a reaction solvent. The rate monomer was added in a molar ratio of 1: 1: 1: 1, and 0.5 parts by weight of normal mercaptan was mixed to 100 parts by weight of the total monomer to make it uniform.

The polymerization solution prepared above is polymerized at a temperature of 105 ° C. in the first reactor, and polymerized at a temperature of 130 ° C. in the second reactor, while being charged to the 26 L reactor at a rate of 14 L / hr, and the third and fourth reactors. When the polymerization was carried out at a temperature of 140 ° C and 145 ° C in the reactor, and the polymerization conversion ratio reached 75%, the unreacted monomer and reaction solvent were removed from the volatile bath at a temperature of 230 ° C, washed, dehydrated, and dried to obtain a weight average molecular weight of 275,000. A phosphorous copolymer of Formula 3 was obtained.

[Formula 3]

In the above formula, R1 and R2 are methyl groups,

a, b, c and d have a molar fraction of 1: 1: 1: 1.

Preparation Example 3: Synthesis of cationic polymer surfactant of Formula 4

(1) Synthesis of cationic surfactant compounds

To a 250 ml flask, 41.86 g of dimethyl dodecylamine represented by Chemical Formula 5 and 21.78 g of epichlorohydrin represented by Chemical Formula 6 were added. As a solvent, 28.98 g of isopropyl alcohol and 7.38 g of distilled water were used. Then, the reaction was performed by stirring at 25 ° for 5 hours. Since the epoxy group is destroyed when the temperature of the reactant due to the reaction heat is increased due to the exothermic reaction, the reaction was performed by taking a water bath at 25 ° C. As a result of the reaction, glycidyl dimethyldodecylammonium chloride of Chemical Formula 7 was obtained. The reaction yield was 85% through amine value measurement and 79% of epoxy value remained.

[Formula 5]

[Formula 6]

[Formula 7]

Glycidyldimethyltetradecylammonium chloride, glycidyldimethylhexadecylammonium chloride, and glycidyldimethyloctadecylammonium chloride are synthesized in the same manner as the synthesis method described above.

(2) Synthesis of acrylic monomers substituted with cationic surfactant compounds

The cationic surfactant compound of Formula 7 prepared above and acrylic acid are dissolved in an isopropyl alcohol solvent in a molar ratio of 1: 1, and maintained in a 45 ° oven for 24 hours to proceed with the reaction. After the reaction was completed, the composition was transferred to a glass filter, and washing was performed to remove unreacted material with 2 L of isopropyl alcohol. After washing, drying was performed in a 45 ° vacuum oven for 8 hours to synthesize an acrylic monomer substituted with a cationic surfactant compound.

(3) Synthesis of cationic polymer surfactant

The glycidyl dimethyl dodecyl ammonium chloride acrylate monomer and dopamine methacrylamide prepared above were added in a molar ratio of 3: 1, and 0.5 parts by weight of normal mercaptan was mixed with 100 parts by weight of the total monomers made. A small amount of disodium hydrogen phosphate was dissolved and stirred in 130 parts by weight of ion-exchanged water in a stainless steel high-pressure reactor with a stirrer, and the reactor was filled with an inert gas such as nitrogen and heated. The reaction was terminated by polymerization at 72 ° C for 3 hours and at 110 ° C for 2 hours. After the reaction was completed, washed, dehydrated and dried to obtain a polymer compound of Formula 4 having a weight average molecular weight of 76,000.

[Formula 4]

In the above formula, R1 and R2 are hydrogen and n is 7.

Example 1: Preparation of back injection material

(1) Manufacture of inorganic back injection material

Ultrafine cement sized from 30㎛ to 100㎛ 48% by weight, 5% by weight of silica fume, 10% by weight of fly ash, 10% by weight of tricalcium aluminate cement, 5% by weight of magnesia, 5% by weight of gypsum, 3% by weight of boron carbide , 3% by weight of silicon nitride, 3% by weight of zirconia, 1% by weight of sialon, 1% by weight of lithium carbonate, 1% by weight of calcium sulfite, 1% by weight of duralumin, 1% by weight of lithium magnesium sodium silicate, 1% by weight of polyethylene vinyl acetate, water reducing agent An inorganic back injection material was prepared by mixing 1% by weight and 1% by weight of a retarder. At this time, the water reducing agent was a polycarboxylic acid-based water reducing agent, and the retarding agent was a citric acid-based retarding agent.

(2) Preparation of organic road backing material

Styrene-methylmethacrylate-butadiene copolymer 92% by weight, polyether-etherketone copolymer 1% by weight, furfuryl alcohol 1% by weight, N-β (aminoethyl) γ-aminopropyl trimethoxysilane 1% by weight , Vinyl acetate-dimethyl maleate copolymer 1% by weight, ethylenebisstearic acid amide 1% by weight, 2,2'-methylenebis (4-methyl-6-tert-butylphenol) 1% by weight, water reducing agent 1% by weight and antifoaming agent 1 An organic back injection material was prepared by mixing weight percent. At this time, the water-reducing agent was a polycarboxylic acid-based water reducing agent, and the antifoaming agent was a silicone-based antifoaming agent.

(3) Preparation of organic / inorganic mixed back injection material

An organic / inorganic mixed back injection material was prepared by mixing the inorganic back injection material and the organic back injection material in a weight ratio of 5: 1.

Example 2: Preparation of back injection material

(1) Preparation of inorganic back injection material

48% by weight of ultra-fine cement, 5% by weight of silica fume, 10% by weight of fly ash, 10% by weight of tricalcium aluminate cement, 5% by weight of magnesia, 5% by weight of gypsum, 3% by weight of boron carbide, 3% by weight of silicon nitride, zirconia 3% by weight, 1% by weight of sialon, 1% by weight of lithium carbonate, 1% by weight of calcium sulfite, 1% by weight of duralumin, 1% by weight of lithium magnesium sodium silicate, 1% by weight of polyethylene vinyl acetate, 1% by weight of water reducing agent, and retarder 1 An inorganic back injection material was prepared by mixing weight percent. At this time, the water-reducing agent was a polycarboxylic acid-based water reducing agent, and the retarding agent was a citric acid-based retarding agent.

(2) Preparation of organic back injection material

Styrene-methylmethacrylate-butadiene copolymer 79% by weight, 7% by weight of the copolymer of formula 3 prepared in Preparation Example 2, 2% by weight of a polyether-ether ketone copolymer, 2% by weight of furfuryl alcohol, N- β (aminoethyl) γ-aminopropyltrimethoxysilane 2% by weight, vinyl acetate-dimethyl maleate copolymer 2% by weight, ethylenebisstearic acid amide 2% by weight, 2,2'-methylenebis (4-methyl-6- Tert-butylphenol) was used containing 2% by weight, 1% by weight of a water reducing agent and 1% by weight of an antifoaming agent. At this time, the water-reducing agent was a polycarboxylic acid-based water reducing agent, and the antifoaming agent was a silicone-based antifoaming agent.

[Formula 3]

In the above formula, R1 and R2 are methyl groups,

a, b, c and d have a molar fraction of 1: 1: 1: 1.

Weight average molecular weight 275,000

(3) Preparation of organic / inorganic mixed back injection material

An organic / inorganic mixed back injection material was prepared by mixing the inorganic back injection material and the organic back injection material in a weight ratio of 5: 1.

Example 3: Preparation of back injection material

(1) Preparation of inorganic back injection material

48% by weight of ultra-fine cement, 5% by weight of silica fume, 10% by weight of fly ash, 10% by weight of tricalcium aluminate cement, 5% by weight of magnesia, 5% by weight of gypsum, 3% by weight of boron carbide, 3% by weight of silicon nitride, zirconia 3% by weight, 1% by weight of sialon, 1% by weight of lithium carbonate, 1% by weight of calcium sulfite, 1% by weight of duralumin, 1% by weight of lithium magnesium sodium silicate, 1% by weight of polyethylene vinyl acetate, 1% by weight of water reducing agent, and retarder 1 An inorganic back injection material was prepared by mixing weight percent. At this time, the water-reducing agent was a polycarboxylic acid-based water reducing agent, and the retarding agent was a citric acid-based retarding agent.

(2) Preparation of organic back injection material

Styrene-methylmethacrylate-butadiene copolymer 73% by weight, 7% by weight of the copolymer of formula 3 prepared in Preparation Example 2, 3% by weight of the copolymer represented by Formula 4 prepared in Preparation Example 3, polyether- 3% by weight of ether ketone copolymer, 3% by weight of furfuryl alcohol, 3% by weight of N-β (aminoethyl) γ-aminopropyl trimethoxysilane, 2% by weight of vinyl acetate-dimethyl maleate copolymer, ethylenebisstearic acid amide 1 An organic back injection material was prepared by mixing 3% by weight, 2,2'-methylenebis (4-methyl-6-tert-butylphenol), 1% by weight of a water reducing agent, and 1% by weight of an antifoaming agent. At this time, the water-reducing agent was a polycarboxylic acid-based water reducing agent, and the antifoaming agent was a silicone-based antifoaming agent.

[Formula 4]

In the above formula, R1 and R2 are hydrogen and n is 7.

Weight average molecular weight 76,000

(3) Preparation of organic / inorganic mixed back injection material

An organic / inorganic mixed back injection material was prepared by mixing the inorganic back injection material and the organic back injection material in a weight ratio of 5: 1.

Example 4: Preparation of back injection material

(1) Preparation of inorganic back injection material

Ultrafine cement 45% by weight, silica fume 5% by weight, fly ash 10% by weight, tricalcium aluminate cement 10% by weight, magnesia 3% by weight, gypsum 5% by weight, boron carbide 3% by weight, silicon nitride 3% by weight, zirconia 3% by weight, 1% by weight of sialon, 1% by weight of lithium carbonate, 1% by weight of calcium sulfite, 1% by weight of duralumin, 1% by weight of lithium magnesium sodium silicate, 1% by weight of polyethylene vinyl acetate, prepared in Preparation Example 1 An inorganic back injection material was prepared by mixing 3 wt% of the copolymer of Formula 1, 2 wt% of the compound of Formula 2, 1 wt% of the water reducing agent, and 1 wt% of the retarder. At this time, the water-reducing agent was a polycarboxylic acid-based water reducing agent, and the retarding agent was a citric acid-based retarding agent.

[Formula 1]

In the above formula, a and b are molar ratios, and a = 0.5 and b = 0.5.

The weight average molecular weight is 25,000.

[Formula 2]

(2) Preparation of organic back injection material

It was prepared in the same manner as in Example 3.

(3) Preparation of organic / inorganic mixed back injection material

An organic / inorganic mixed back injection material was prepared by mixing the inorganic back injection material and the organic back injection material in a weight ratio of 5: 1.

Test Example 1: Evaluation of compressive strength

The results of the compression strength test according to the method specified in KS F 2405 for the organic / inorganic mixed back injection material prepared in Examples 1 to 4 were shown. Table 1 below shows the change in compressive strength over time.

division Compressive strength (MPa) 3 days later 7 days later 14 days later 28 days later Example 1 28.1 36.0 39.1 46.8 Example 2 29.8 38.0 41.0 49.0 Example 3 31.0 39.0 42.0 50.0 Example 4 31.5 39.8 43.0 51.5

As shown in Table 1, the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 exhibited excellent compressive strength.

Test Example 2: Evaluation of adhesive strength

For the organic / inorganic mixed back injection material prepared according to Examples 1 to 4, adhesive strength was measured according to the method specified in KS F 2762, and the results are shown in Table 2.

division Adhesive strength (MPa) 7 days later 28 days later Example 1 1.9 2.1 Example 2 2.1 2.3 Example 3 2.2 2.4 Example 4 2.3 2.6

As shown in Table 2, the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 exhibited excellent adhesive strength. In particular, Examples 2 to 4 showed better effects.

Test Example 3: Evaluation of water penetration resistance

For the organic / inorganic mixed back injection material prepared according to Examples 1 to 4, a moisture permeability resistance test was performed according to the method specified in KS F 4042 (Polymer cement mortar for repairing concrete structures), and the results were as follows. It is shown in Table 3.

division Moisture permeation resistance (m) Example 1 0.5 Example 2 0.4 Example 3 0.4 Example 4 0.2

As shown in Table 3, the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 exhibited excellent moisture permeation resistance. Particularly, in the case of Example 4, the compound of Formula 1 was included to show a remarkably excellent effect.

Test Example 4: Neutralization resistance evaluation

For the organic / inorganic mixed back injection material prepared according to Examples 1 to 4, a neutralization resistance test was performed according to the method specified in KS F 4042 (Polymer cement mortar for repairing concrete structures), and the results are shown in the following table. It is shown in 4.

division Moisture permeation resistance (m) Example 1 0.3 Example 2 0.15 Example 3 0.12 Example 4 0.10

As shown in Table 4, the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 exhibited excellent neutralization resistance.

Test Example 5: salt penetration resistance evaluation

For the organic / inorganic mixed back injection material prepared according to Examples 1 to 4, a salt penetration resistance test was performed by KS F 2711, and the results are shown in Table 5 below.

Example 1 Example 2 Example 3 Example 4 Salt penetration resistance (coulombs) 480 420 390 210

As shown in Table 5, it was confirmed that the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 had excellent resistance to salt penetration. In particular, in the case of Example 4, it can be confirmed that the salt penetration resistance was greatly improved by including the compound of Formula 2.

Test Example 6: Evaluation of freeze-thaw resistance

The organic / inorganic mixed back injection material prepared according to Examples 1 to 4 was subjected to a freeze-thaw resistance test according to the method specified in KS F 2456, and the results are shown in Table 6 below.

Example 1 Example 2 Example 3 Example 4 Freeze-thaw resistance (%) 89 90 91 92

As shown in Table 6, the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 exhibited excellent ring freeze-thaw resistance.

Test Example 7: Evaluation of rust resistance

The organic / inorganic mixed back injection material prepared according to Examples 1 to 4 was subjected to an anti-rust test by KS F 2561 (rust inhibitor for reinforced concrete), and the results are shown in Table 7 below.

Test Items Example 1 Example 2 Example 3 Example 4 Anti-rust rate (%) 96.0 97.0 97.5 98.5

As shown in Table 7, the organic / inorganic mixed back injection material prepared according to Examples 1 to 4 has a low anti-corrosion rate and thus has a high anti-corrosive effect.

As described above, the preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the above embodiments, and various modifications are made by those skilled in the art within the scope of the technical spirit of the present invention. This is possible.

(10): Concrete structure (11): Crack
(20): waterproof layer (30): inorganic injection hole
(40): Back repair material (50): Inorganic film
(60): Back repair material injection hole (70): Back repair material
(90): inorganic cement mortar or water-based sealant
(100): Ground layer (110): Protective pressing layer

Claims (8)

(a) an injection position determination step of determining an injection position according to the presence or absence of a crack, a gap, a leak mark, and a waterproof layer in a concrete structure in which a leak defect occurs; (B) a hole opening step of opening a hole penetrating to the waterproof layer or the ground layer of the concrete structure according to the determination of the injection position; (c) an inlet installation step of installing an inlet having a single tube or a double tube in the opened hole; (d) a sealing step of suturing the site where the leakage defect of the concrete structure occurs; (e) generating a back injection material; (f) an injection step of forcibly injecting the back injection material by a pump through a single pipe injection port or a double pipe injection port; And (g) a sealing step of removing the inlet and sealing it;
The back injection material is mixed with (1) an inorganic back injection material and (2) an organic back injection material to form a single repair layer, or (1) an inorganic back injection material is first injected and cured, followed by (2) an organic back injection material. To form a two-layer repair layer,
The (1) inorganic back injection material is 5 to 75% by weight of ultrafine cement having a size of 30㎛ to 100㎛, 0.1 to 20% by weight of silica fume, 0.1 to 20% by weight of fly ash, 0.1 to 20% by weight of tricalcium aluminate cement , Magnesia 0.01 to 20% by weight, gypsum 0.01 to 20% by weight, boroncarbide 0.01 to 10% by weight, silicon nitride 0.01 to 10% by weight, zirconia 0.01 to 10% by weight, sialon 0.01 to 10% by weight, lithium carbonate 0.01 to 10% by weight %, 0.01 to 10% by weight of calcium sulfite and 0.01 to 10% by weight of duralumin,
The (2) organic back injection material is styrene-methyl methacrylate-butadiene copolymer 30 to 95% by weight, polyether-ether ketone copolymer 0.1 to 25% by weight, furfuryl alcohol 0.01 to 15% by weight, N-β ( Aminoethyl) γ-aminopropyl trimethoxysilane 0.01 to 15% by weight, vinyl acetate-dimethyl maleate copolymer 0.01 to 15% by weight, 0.01 to 10% by weight of a polycarboxylic acid-based water reducing agent and 0.01 to 10% by weight of an antifoaming agent Concrete structure characterized by characterized in that the back injection leak and oil leakage repair method. According to claim 1,
The (1) inorganic back injection material is a concrete structure, characterized in that it further comprises 1 to 5% by weight of the copolymer represented by the following formula (1) Leakage and leakage repair method:
[Formula 1]

In the above formula, a and b are molar ratios, and a + b = 1. According to claim 2,
The (1) inorganic back injection material is an organic copper compound represented by the following formula (2) 0.1 to 3% by weight relative to the total weight of the composition concrete structure rear injection leakage and leakage repair method:
[Formula 4]

According to claim 3,
The (2) organic back injection material is a concrete structure characterized in that it further comprises 3 to 15% by weight of the copolymer represented by the following formula (3) Leak injection and leakage repair method:
[Formula 1]

In the above formula, R1 and R2 are hydrogen or a methyl group,
a, b, c and d are mole fractions, a is 0.1 to 0.5, b is 0.1 to 0.5, c is 0.1 to 0.5, d is 0.1 to 0.5, and a + b + c + d = 1. According to claim 4,
The (2) organic back injection material is a concrete structure, characterized in that it further comprises 1 to 5% by weight of a cationic polymer surfactant represented by the following formula (4) Leakage and leakage repair method:
[Formula 2]

In the above formula, R1 and R2 are hydrogen or a methyl group,
a and b are molar ratios, and a + b = 1. The method of claim 5,
The (2) organic back injection material is 0.01 to 10% by weight of ethylenebisstearic acid amide and 2,2'-methylenebis (4-methyl-6-tert-butylphenol) selected from 0.01 to 10% by weight Concrete structure characterized in that it further comprises a back injection leak and leak repair method. The method of claim 6,
The (1) inorganic back injection material is characterized in that it further comprises 0.01 to 10% by weight of lithium magnesium sodium silicate. The method of claim 7,
Further comprising a step of installing an injection volume adjusting device for installing one or more adjusting devices capable of adjusting the injection amount around the installed injection hole, characterized in that during the forced injection of the back injection material, by adjusting the opening and closing of the injection amount adjusting device to adjust the injection amount Concrete structure back injection leak and oil leakage repair method.

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