JP2001193286A - Repair and reinforcing method for surface of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair and reinforcing method for the surface of a structure capable of economically lengthening the years of durability of the surface for various deteriorated concrete infrastructures by utilizing new materials. SOLUTION: A predetermined surface of the surface layer of a surface to be repaired of a concrete structure consisting of a plane or curved surface is covered, a surface coming into contact with the concrete structure is tightly adhered to a flexible form 1 having grooves formed to a grid pattern or a pattern of meshes of a net, and a two-liquid type reaction type hardening resin is injected to the surface to be repaired from a filling hole 3A made in the form 1 in this repair and reinforcing method for the structural surface. At this time, a negative pressure is given to the surface to be repaired, and the two-liquid reaction type hardening resin is sucked and filled to the surface to be repaired in a state of a negative pressure given to the surface to be repaired. Moreover to the surface to be repaired, a grid-shaped or mesh-shaped projected stripes made of the two-liquid reaction type hardening resin alone or with a compound member of a tensile reinforcing material are formed. In forming this projected stripes, the two-liquid reaction type hardening resin is injected and continuously and at the same time to the inside having cracks as structural defects thereby forming a reinforcing shape with strong anchors as one united body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing cracks in a concrete structure and repairing and reinforcing a concrete structure having a deteriorated surface layer.

[0002]

2. Description of the Related Art Among the conventional methods for repairing cracks in concrete structures, expensive one-pack chemical fillers are used as a method for repairing cracks of about 0.2 mm and structural defects for hair lines of less than 0.2 mm. A press-in method is known. However, since the material and construction are special and expensive, they are not used in places with a large crack width. At present, cracks of millimeters or more are separately substituted by filling, pouring, or the like of resin paste or resin mortar, but these methods are not sufficient in terms of the reliability of filling. It is not in a state where structural defects can be compensated for in terms of overall performance. In addition, with the conventional technology, concrete hardened bodies are easily and economically integrated with each other,
There was no way to overcome the strength characteristics and the water barrier performance at the same time.

[0003]

SUMMARY OF THE INVENTION Regarding the durability of a concrete structure of an infrastructure, a study will be made by focusing on the cause of deterioration from the surface layer. First, even a general reinforced concrete structure is reinforced from the surface layer. It can be said that all of the gaps between the reinforcing bars are unreinforced concrete.
In other words, at present, the tensile stress generated by various internal and external causes depends only on the tensile resistance of the concrete itself, the performance of which is a weak point.

[0004] Therefore, all reinforced concrete structures are cracked from the surface before a dynamic reinforcing force such as an earthquake or repetitive vibration caused by various factors is generated and the tensile reinforcement starts to resist. Occurs. In addition, concrete, such as mass concrete with a small amount of reinforcing steel, which is often found in concrete structures for civil engineering, is likely to crack as a material fate, from the relationship between shape and scale, due to drying shrinkage and creep. .
As a material factor, expansion cracking due to alkali-aggregate reaction is also increasing.

[0005] Since those cracks have been left for these reasons, the oxidation of the internal reinforcing steel is promoted,
The reinforcing steel rusts and expands, and the concrete surface layer is being destroyed. Furthermore, the promotion of neutralization, which is caused by environmental degradation, and the occurrence of salt damage due to the increase in the use of sea sand as fine aggregates have been problematic as factors promoting rust of reinforcing steel.

[0006] Further, concrete degradation is a problem even in places where hydrogen sulfide is generated such as repeated frost damage under severe environmental conditions and sewage treatment plants.

The problem to be solved by the present invention is to provide a new reinforcement / repair method utilizing new materials for various degraded concrete infrastructures due to these various factors, thereby economically extending the service life. It is an object of the present invention to provide a method of repairing and reinforcing a surface of a structure which can be performed.

[0008]

In order to solve the above-mentioned problems, a method for repairing and reinforcing a structure surface according to the present invention covers a predetermined surface on a surface layer of a repair surface of a concrete structure having a flat or curved surface, and A flexible mold having a groove in which the surface in contact with the concrete structure has a lattice or mesh pattern is brought into close contact, and a two-pack reaction type cured resin is injected into the repair surface from a nozzle provided in the mold. It is characterized by the following. At the time of this injection, it is effective to inject the two-part reaction type cured resin under pressure or under reduced pressure in order to enhance the injection filling effect depending on the degree of progress of crack deterioration at the repaired part.

On the repaired surface, a two-component reactive curing resin alone or a lattice or mesh pattern having a composite structure with a tensile reinforcing material is formed. At this time, at the same time, a material of the same quality is also integrally injected into the cracked portion to form a strong anchor.

In order to prevent the material from being deteriorated by ultraviolet rays and to detect defects such as cracks that occur after the repair and reinforcement work, an inorganic ceramic is provided on the surface and peripheral portions of the repair and reinforcement parts. Apply a hard surface finish film by spraying or painting the material.

In another method for repairing and reinforcing a surface of a structure according to the present invention, a collapsed portion of a surface of a concrete structure having a flat or curved surface is removed, and a predetermined space is provided from the surface to temporarily fix the surface. A highly durable panel is attached by an anchor, and a two-part reactive curing resin is filled between the surface layer and the durable panel. In this method, the highly durable panel has a bent portion having a dovetail cross section.

Further, another method for repairing and reinforcing the surface of a structure according to the present invention is to provide a method of drilling a plurality of holes for investigation into a concrete structure having a flat surface or a curved surface, and inserting a microscope to check the state of cracks. The crack is filled with the two-component reaction type cured resin by suction under reduced pressure or resin pressure injection using the inspection pores according to the state of occurrence of the crack.

Further, another repairing and reinforcing method for the surface of a structure according to the present invention is to prevent the deterioration and the like of ultraviolet rays on the surface layer and the peripheral portion of the repairing and reinforcing portion carried out by using a two-component reactive curing resin. For the purpose of discovering defects such as cracks after repair and reinforcement work as early as danger prediction, spray or spray inorganic ceramic material to apply a hard surface finish film. It is characterized by building.

As the two-part reactive curing resin in the present invention, a catalyst-curable unsaturated polyester resin or an acrylic resin can be used. It is preferable to use a liquid epoxy resin or a two-pack polyurethane resin.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the following new construction method is used by using a two-component reaction type cured resin having good compatibility with concrete, so that the following conventional methods are considered impossible. Repair of deteriorated concrete structures
Reinforcement is economically possible.

Material Properties (1) Use of Two-Part Reactive Curing Resin In the embodiment of the present invention, the resin does not cure during storage,
What consists of a two-pack reaction type hardening resin solution which hardens after mixing is used. For example, a two-component reaction-type polyurethane resin composed of a main component solution composed of a polyester polyol or a polyether polyol and a curing agent solution containing a 4.4-diphenylmethane diisocyanate component or a main component solution composed of a bisphenol-type liquid epoxy resin, and a polyamideamine, A two-pack reaction type epoxy resin comprising a curing agent solution containing a component such as a modified polyamine is exemplified. The main agent and hardener solution are easily mixed with the main agent and hardener in advance, and do not impede the hardening reaction in order to facilitate penetration and filling of the deteriorated part of the concrete structure. , A plasticizer such as dibutyl phthalate or dioctyl phthalate, or a high-boiling solvent can be added to such an extent as not to lower the solvent content. In addition, a solution containing a silicic acid component can be mixed with the main agent or used alone for the purpose of improving familiarity with the concrete surface and obtaining a strong bonding force due to a chemical reaction with an alkali component of the concrete structure. Examples of the solution containing a silicate component include a water glass solution mainly containing an alkali metal silicate such as sodium silicate, potassium silicate, and lithium silicate, and a solution of colloidal silica or alkoxylan alone or a mixture of two or more thereof. No.

(2) When using the two-part reactive curing resin, a dedicated (stirring / injection) machine can be used.
The negative pressure area can be easily created by combining a compressor or an electric suction machine with a peripheral insulating frame, and a flexible form having a groove in which the surface in contact with concrete forms a lattice or mesh pattern. is there. (3) A material whose time can be controlled can be selected according to the purpose. The materials used have different curing times depending on the blending components, and can be selected according to the purpose. (4) As for the physical properties of the main body after the filling and hardening reaction, it exhibits an adhesive force that exceeds the material tensile strength of the concrete base material stably for a long time and continues to exhibit a performance that always exceeds the compressive strength of the base material. . Further, the strength can be selected according to the purpose. (5) The adoption of the main body does not cause a defect even in various conditions relating to durability other than the mechanical durability described above.

As a two-part reactive curing resin satisfying such requirements, for example, Carbo Lis Flex (CarboL)
ith Flex: Carbotech, Germany). This two-part reaction type cured resin uses sodium silicate as a main agent liquid and a polyurethane prepolymer as a curing agent liquid. When both solutions react, they form a hard, elastic organic mineral containing silicate. When both solutions are thoroughly mixed, the resulting viscous emulsion is immiscible with water and does not absorb any water from, for example, surrounding soil or rock formations.

As another two-part reaction curing resin, CarboLith (trade name of CARBOTECH, Germany) can be used. This two-part reaction type cured resin uses a mixture of sodium silicate and an additive as a main agent liquid, and a polyisocyanate of 4.4-diphenylmethane diisocyanate group as a curing agent liquid. During the reaction, a non-foamable organic mineral resin (silicate resin) is formed at the same time that the polyurea mass is formed. Also, when the two solutions are mixed with each other, the resulting viscous emulsion does not absorb any more water and does not mix with the water and penetrates from the concrete surface into the interior.

Incidentally, the two-pack reaction type cured resin of the present invention is not limited to the above-mentioned examples, and it goes without saying that other resins can be used.

The following points should be noted when implementing this method. (1) Before starting the pouring operation, cure the filling material to prevent the filling material from hardening and to prevent the pouring material from leaking. (2) A liquid material that easily flows before starting the curing reaction,
Regarding the method of filling the construction part with the injection machine, “press-fitting”, “negative pressure suction injection”, “pour-in” and the like are mentioned according to the situation of the construction part. If the cracks in the concrete structure reach the back, pressurize the resin to accelerate the injection speed.If the crack depth remains in the concrete surface layer, apply negative pressure to the repaired surface. Before the resin hardens, it can spread to minute gaps.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments. <First Embodiment> FIG. 1 is a perspective view showing the structure of an apparatus for carrying out a method according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a flexible mold made of rubber or the like whose surface is coated with polyvinylidene chloride or the like from which a two-component reaction-type cured resin is easily peeled, and 2 denotes a grid formed on the flexible mold 1. V-grooves, 3A are injection holes provided at several places of the flexible mold 1, 3B are suction holes provided at the center of the flexible mold 1,
4 is a peripheral sealing material, 5A is an injection hose communicating with the injection hole 3A, 5B is a suction hose communicating with the suction hole 3B, 6 is a pressure interlocking valve, 7 is a pressure reducing device, and 8 is an injection of a two-component reaction type cured resin. -Reaction-type cured resin supply device for

In the first embodiment, a concrete structure having a flat or curved surface is repaired. For example, in the case of a tunnel having an arched ceiling, as shown in FIG. 2 (a), a compressive force is applied to the concrete wall 10 by applying earth pressure. Cracks 11 occur due to the aging of the structure inside 10, and if these are left as they are, the cracks progress. Eventually, the concrete walls will fall off, increasing the risk of accidents. Then, V of flexible form 1
After the tension reinforcing material 12 such as carbon fiber is set in the groove 2 in a built-in manner, or the tension reinforcing material 12 is temporarily fixed in a predetermined place in advance, the flexible form 1 is placed on the surface of the concrete wall 10. Then, the pressure interlocking valve 6 is operated to reduce the pressure through the suction hole 3B at the center of the flexible mold 1.

Thereafter, when the pressure-linked valve 6 is actuated to inject the two-part reactive curing resin from the two-part reactive curing resin supply device 8 through the injection hole 3A, the two-part reactive curing resin is injected from the V groove 2 communicating with the injection hole 3A. The liquid-reaction-type cured resin penetrates and hardens the wall surface, especially the cracked portion, and binds the internal structure of the concrete to reinforce the wall surface. Further, since the V-groove 2 is in close contact with the entire surface of the concrete wall 10, the hardening agent filled in the V-groove 2 forms a ridge 13, which is a lattice-like reinforcing portion, together with the tensile reinforcing material 12. Prevents concrete walls from falling off.

If the cracks are large and are connected to the outside, etc., the suction and injection will be incomplete because the negative pressure region cannot be formed even if the vacuum effect is applied. In that case, the automatic press-fit pump linked to the pressure-operated valve 6 is operated, and the injection method is switched from “suction” to “press-fit” to perform injection. Also at this time, the work fixing plate is mechanically pressed so that the pitch between the V-grooves is simultaneously restrained by the mold frame and is not moved by the injection effect simultaneously with the suction. FIG. 2B is an explanatory view of a concrete wall surface after repair, and FIG. 2C is a sectional view thereof.

<Second Embodiment> FIG. 3 is a view for explaining a method according to a second embodiment of the present invention. FIG. 3 (a-
1) and (a-2) are a sectional view and a front view of a deteriorated structure 20 such as a dam. Prior to construction, Figure 3 (b-1)
As shown in (b-2), the collapsed portion of the surface concrete is removed. Thereafter, as shown in FIGS. 3 (c-1) and 3 (c-2), a high-durability panel 22 such as a precast concrete panel is attached with a predetermined gap provided between the wall and the wall by the temporary anchor 21. Next, a two-part reactive hardening resin is injected and filled into the gap between the highly durable panel 22 and the wall surface. As a result, the concrete wall surface and the highly durable panel 22 are firmly adhered to each other, and the filled layer 23 of the two-component reaction-type cured resin becomes a waterproof layer. Since it can be insulated from the external environment, it is also effective as a measure for preventing deterioration after repair work.

<Third Embodiment> FIG. 4 is a perspective view for explaining a method according to a third embodiment of the present invention, and FIG. 5 is a sectional view thereof. In this embodiment, as in the second embodiment, after the collapsed portion of the surface concrete of the deteriorated structure 20 is removed, a stainless steel folded plate 24 having a dovetail-shaped bent portion formed at a predetermined interval is separated from the separator 25. Then, a hardener 26 is poured into or filled with the wall surface (see FIG. 5 (b)). In order to prevent deformation of the folded stainless steel plate 24, a support 27 is assembled outside the folded stainless steel plate 24 and cured. Since the stainless steel folded plate 24 is formed with a bent portion having a dovetail-shaped cross section, the stainless steel folded plate 24 performs an anchoring action in shape. In addition, since the bent portion has an expanding effect, it can adapt to the difference in the coefficient of thermal expansion from the two-component reactive curing resin. The support 27 is incorporated into the outside of the folded stainless steel plate 24, cured and fixed, and the two-component reaction type cured resin is injected into the inside. Since the strength is developed in a short time, the support 27 is removed after confirming that it has hardened to a state in which it is difficult to deform. It should be noted that other than the stainless steel folded plate 24, any material having high durability can be used as a composite material. In addition, this method is not limited to the method of repairing a deteriorated structure, but can be naturally used as a method of finishing the inner surface of a newly constructed concrete container structure.

<Fourth Embodiment> FIGS. 6 and 7 are views for explaining a method according to a fourth embodiment of the present invention. FIG.
As shown in (a), when a crack 31 is found in a concrete structure 30 such as a railway tunnel by visual inspection or the like, a drill or the like is used near a reinforcing bar 32 near the crack 31 as shown in FIG. The investigation pore 33 is pierced. The location of the reinforcing bar 32 can be known by an electromagnetic flaw detector or the like. Next, a microscope 36 with a light source device 35 mounted on a microscope inspection device 34 that can run on a rail as shown in FIG.
And observe the display 37 for the presence of cracks and the like. When a crack is found, as shown in FIG. 6 (c), a negative pressure is suctioned from one of the investigation pores 33 using the investigation pore 33, and the other investigation pore 33 is used.
, A two-pack reaction type cured resin is injected. As a result, the two-component reaction-type cured resin is filled in the crack, and a portion where the structure is likely to be peeled off is adhered to prevent the falling off.

As a method of repairing the entire ceiling surface at once, as shown in FIG. 7, a flexible mold 38 provided on the upper part of the microscope inspection device 34 is brought into close contact with the ceiling surface, and
In the same manner as in the embodiment, the ceiling surface of one span is repaired by negative pressure and injection of a two-part reactive curing resin. When the repair is completed, it is possible to move to the next span and continue the investigation and repair.

<Fifth Embodiment> FIGS. 8 and 9 are views for explaining a method according to a fifth embodiment of the present invention.
Is a sectional view, and FIG. 9 is a front view. In the present embodiment, after the repair and reinforcement work of the first embodiment is completed, it is inevitable that cracks and peeling phenomena newly occur, including in other places due to various reasons, so the meaning of early danger prediction is important. Also, the finishing work is performed with a hard surface film by a method such as spraying or painting an inorganic ceramic material.

That is, as shown in FIGS. 8 (a) and 9 (a), after a portion where a crack has occurred is filled with a two-part reactive curing resin according to the first embodiment (FIG. 8 (b)). 9) and FIG. 9 (b)), a hard surface layer film 14 is formed by a method such as spraying or painting an inorganic ceramic material (FIGS. 8 (c) and 9 (c)). As a result, it is possible to prevent surface layer deterioration of the two-component reaction-type cured resin. After this repair, a new crack 1
5 (see FIG. 8D and FIG. 9).
(D)). The new cracks 15 can be easily found visually by forming on the surface layer 14 of the uniform hard ceramic. Since it is possible to prevent the crack 15 from immediately peeling off due to the effective action of the tension reinforcing material 12 in the ridge 13, an inspection sheet 16 is attached when it is found, and the width of the crack at that time is recorded. At the time of the next inspection, it is possible to determine whether or not repair is necessary by measuring whether or not cracks have progressed.

As described above, according to the fifth embodiment, it is possible to visually inspect the danger prediction efficiently and efficiently by repairing / reinforcing and detecting the destruction state of the ceramic surface layer film at a new defective portion.

[0033]

As described above, according to the present invention, the following effects can be obtained. (1) By changing the conventional local point press-fitting method to a suction injection or press-fitting method in which a flexible form having a groove in which a surface in contact with a concrete structure has a lattice or mesh pattern is closely attached. In addition, it is possible to omit a pre-processing work such as a leak prevention for the point press-fitting method, and it is possible to greatly reduce a filling and filling work time. (2) The efficiency is improved in terms of filling performance by changing to suction injection in a sealed state without being limited to press-fitting. (3) By forming a grid-like ridge on the surface layer, a concrete exfoliated body larger than the grid frame size can be restrained by dispersing the load around the concrete. (4) Since the surface peeled body due to the internal filler during the pouring operation can also be fixed by the planar restraint of the attachment, lifting can be prevented in advance. (5) In addition to the adhesive effect of the lattice-shaped molded body, since the material is continuously formed by penetrating into cracks that are obstacles, anchor strength is increased by a synergistic effect. (6) Since a method is used in which a predetermined surface is covered on the surface layer of the repair surface, and the surface in contact with the concrete structure is repaired by closely adhering a flexible form having grooves forming a lattice or a mesh pattern. Injection repair can also be performed on undiscovered faults at the same time. (7) Since a tensile reinforcing material can be compounded inside a ridge-shaped molded product having a lattice or mesh pattern, strength measures can be taken according to the purpose. (8) After completion of the repairing and reinforcing methods, by applying a coating finish with a hard ceramic film, it is easy to find a fault location occurring afterward, and the inspection cost can be reduced. (9) By combining this new method with a new high-strength concrete panel and an old concrete structure, the water-blocking effect of the two-component hardener is effective, and the life of the old concrete inside can be extended. . (10) Under severe environmental conditions for a concrete structure, by adopting this method, a composite with a highly durable metal panel or the like can be economically prevented from deteriorating from the concrete surface layer. (11) The hole of the microscope for inspection can be used for filling the repair material. (12) A material whose time can be controlled can be selected according to the purpose. (13) The physical properties of the two-part reaction type cured resin after the filling and curing reaction are such that the adhesive strength exceeding the material tensile strength of the concrete base material is stably exhibited for a long time and the compressive strength of the base material is always exceeded. Continue to demonstrate performance. (14) The adoption of the two-pack reaction type cured resin does not cause a defect even for various durability conditions other than the mechanical durability described above. (15) As described above, it is possible to economically repair and reinforce deteriorated concrete, which has been impossible in the past.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an apparatus for performing a method according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a repair process according to the first embodiment.

FIG. 3 is a view for explaining a method according to a second embodiment of the present invention.

FIG. 4 is a perspective view illustrating a method according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view for explaining a method according to a third embodiment of the present invention.

FIG. 6 is a view for explaining a construction method according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram showing an example of an apparatus for implementing a fourth embodiment.

FIG. 8 is a cross-sectional view for explaining a method according to a fifth embodiment of the present invention.

FIG. 9 is a front view for explaining a method according to a fifth embodiment of the present invention.

[Explanation of symbols]

1 Flexible frame, 2 V groove, 3 A injection hole, 3 B suction hole, 4 peripheral sealing material, 5 A injection hose, 5 B suction hose, 6 pressure interlocking valve, 7 decompression device, 8 two-component reactive curing resin, 9 supply Equipment, 10 Concrete wall, 11 Crack, 12 Tensile reinforcement, 13 Ridge, 14 Surface film, 15 New crack, 20 Deteriorated structure, 21
Temporary anchor, 22 High durability panel, 23 Packing layer, 24 stainless folded plate, 25 separator, 26
Two-component reaction-type cured resin, 27 support, 30 concrete structure, 31 crack, 32 reinforcing bar, 33 investigation pore, 34 microscope investigation device, 35 light source device, 36 microscope, 37 display,
38 Flexible frame

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayuki Kurose 9-9 Ienocho, Nagasaki City, Nagasaki Prefecture Taiyo Technology Development Co., Ltd. (72) Inventor Kazuhiko Tawaraguchi 1-3-32 Takamiya, Minami-ku, Fukuoka City, Fukuoka Prefecture (72) Inventor Masashi Tanno 67-1 Kokuki Okuki, Shirooka-cho, Minamisaitama-gun, Saitama Prefecture Park City Shiraoka B-407 F-term (Reference) 2E176 AA01 BB14 BB17

Claims (8)

[Claims] 1. A flexible mold having a predetermined surface on a surface of a repair surface of a concrete structure having a flat surface or a curved surface, and having a groove in which a surface in contact with the concrete structure has a lattice or mesh pattern formed thereon. A method for repairing and reinforcing a structure, wherein a frame is brought into close contact, and a two-component reaction-type cured resin is injected into the repair surface from a nozzle provided in the mold. 2. A repair and repair method for a structure according to claim 1, wherein a convex lattice or a mesh pattern composed of a two-part reactive curing resin alone or a composite with a tensile reinforcing material is formed on the repair surface. Reinforcement method. 3. The method according to claim 2, wherein:
2. The method for repairing and reinforcing a structure according to claim 1, wherein the inside of the crack, which is a structural defect, is simultaneously filled and injected with the two-component reactive curing resin to form an integral and strong anchored reinforcing shape. . 4. A concrete structure consisting of a flat surface or a curved surface, in which a collapsed portion of a surface layer is removed, a high-durability panel is attached by a temporary anchor at a predetermined distance from the surface layer, and the surface layer and the high surface are fixed. A method for repairing and reinforcing a structure, characterized by injecting a two-part reactive curing resin into the repaired surface between durable panels. 5. The method for repairing and reinforcing a structure according to claim 4, wherein the highly durable panel has a bent portion having a dovetail cross section. 6. A state of a crack is inspected while drilling a plurality of holes for investigation into a concrete structure having a flat or curved surface and inserting a microscope. The method for repairing and reinforcing a structure according to claim 1, wherein the two-part reactive curing resin is injected using the holes. 7. For the purpose of preventing the ultraviolet ray deterioration on the surface portion and the peripheral portion of the repair and reinforcement portion implemented in claim 1,
A method of repairing and reinforcing a structure characterized by forming a hard surface finish film by applying an inorganic coating agent by spraying or brushing. 8. The two-part reactive curing resin according to claim 1, wherein the two-part reactive curing resin is a two-part reactive curing resin comprising a base solution containing a silicic acid component and a curing agent solution containing 4.4-diphenylmethane diisocyanate. Repair and reinforcement methods for structures described in the section.