JP3863238B2 - Concrete repair liquid supply mechanism and concrete incorporating the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a repair liquid supply mechanism built in concrete for repairing a crack generated in the concrete, and concrete capable of self-repairing a crack by incorporating the repair liquid supply mechanism.
[0002]
[Prior art]
As is well known, concrete is itself a brittle material that is prone to cracking. Therefore, various crack prevention measures have been proposed and put into practical use, but it is extremely difficult to completely prevent cracking in concrete. Have difficulty. For this reason, especially when it is necessary to prevent the occurrence of cracks, for example, concrete applied to structural members that require sufficient strength or walls that require a high degree of water-stopping, cracks are required. It is necessary to inspect for the presence of cracks frequently and to repair them promptly when cracks are found.
[0003]
[Problems to be solved by the invention]
However, frequently inspecting and repairing concrete requires a lot of labor and expense, and there are many cases where inspection is impossible or repair is difficult even if cracks are found. There is a problem that early detection of a crack is difficult because it is usually impossible to detect the crack until it grows to some extent, and effective improvement measures are required.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide concrete having a function that can be repaired by itself when a crack occurs, and to realize such concrete together. The present invention is to provide a repair liquid supply mechanism that is suitable for use.
[0005]
[Means for Solving the Problems]
In view of the above circumstances, the repair liquid supply mechanism according to the first aspect of the present invention is built in the concrete, and repairs the crack by supplying the repair liquid to the occurrence of the crack generated in the concrete. It is formed as a pipeline network having a plurality of flow paths through which the repair liquid can be circulated by the material having brittleness equivalent to that of concrete, and the repair liquid throughout the pipeline network. Is filled in a pre-pressurized state, and when the concrete has cracked, the pipe network is broken at the crack occurrence point and the repair liquid is allowed to flow out from the broken part. It is what.
[0006]
In addition, the concrete according to the invention of claim 2 has the above-described repair liquid supply mechanism built therein, and when a crack occurs, the pipe network in the mechanism is broken at the crack occurrence location and the repair liquid is supplied. Thus, the crack can be repaired by itself.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. FIG. 1 and FIG. 2 show an example when the concrete of the present invention is applied to a wall body 1 that requires water blocking. Although the wall body 1 of this embodiment is formed as a normal reinforced concrete structure, a repair liquid supply mechanism 2 is built in the wall body 1 and thereby the wall body 1 is cracked. In some cases, it has a function that can be repaired by itself.
[0008]
The repair liquid supply mechanism 2 is a pipe network 4 in which small-diameter pipes 3 are assembled vertically and horizontally to form a lattice shape as a whole. The pipe network 4 is embedded almost entirely in the wall 1 and is connected via a connecting pipe 6 to a tank 5 arranged at an appropriate external position. Then, the repair liquid R is supplied from the tank 5 to the pipeline network 4, and the supplied repair fluid R is filled in the entire pipeline network 4 and can be distributed over the entire pipeline network 4. Further, since the tank 5 is arranged at a position higher than the pipeline network 4, an appropriate liquid head pressure is given to the repair liquid R in the pipeline network 4, as shown in FIG. When the tubular body 3 is broken, the repair liquid R can flow out quickly from the broken portion C. If necessary, a plurality of tanks 5 may be installed.
[0009]
The pipe body 3 and the pipe network 4 formed by assembling the pipe body 3 are made of a material having brittleness equivalent to that of concrete. Therefore, a crack occurs in an arbitrary position of the wall body 1 incorporating the pipe body 3. In this case, the tubular body 3 is also broken at the crack occurrence location. Brittle materials for forming the pipe body 3 and the pipe network 4 are water glass, cement hardened body, paraffin wax, polyolefin resin, epoxy resin, aminoplast resin, polyamide resin, urethane resin, acrylic resin, unsaturated polyester resin. , And mixtures thereof can be suitably employed, but in any case, as described above, the brittleness is comparable to that of concrete, and when the concrete cracks, it is assumed to be broken at the same time. .
[0010]
The pipe body 3 and the pipe network 4 formed by the pipe body 3 can be manufactured by an appropriate method corresponding to the forming material. However, a preferable example of the manufacturing method is to bundle various fibers together with a fiber bundle. At the same time, a resin coating layer is formed on the surface portion of the fiber bundle and a repair liquid is formed in the center portion by assembling or spraying the resin as exemplified above on the surface portion of each fiber bundle. It is possible to adopt a method of forming a tubular body 3 through which the repair liquid R can be circulated by leaving a hollow portion through which R can circulate, that is, by coating a resin only on the surface portion of each fiber bundle. In this case, if high-strength fibers such as steel fibers and carbon fibers are employed as the above-mentioned fibers, these fibers function as a reinforcing material for the wall body 1 to remarkably increase the strength of the wall body 1, particularly the tensile strength. And the occurrence of cracks can be suppressed. However, even when such high-strength fibers are used, it is necessary that the tubular body 3 be broken without any trouble when a crack occurs.
[0011]
In addition, as said pipe body 3 and the pipe network 4 formed by it, it has sufficient ductility at the time of manufacturing this, or being embedded in concrete, and passage of time after being embedded in concrete. At the same time, it is preferable to employ a material having a property of becoming brittle by reacting with moisture or an alkali component in the concrete and finally becoming brittle as concrete. By doing so, it is possible to avoid the tube body 3 from being inadvertently broken at the time of manufacture or embedding as compared with the case where it has brittleness from the beginning.
[0012]
On the other hand, the repair liquid R is usually liquid and has a property of reacting with moisture, an alkali component or air in the concrete by contacting with the concrete, or filling the cracks by the reaction. Products that produce the reaction products obtained, for example, alkali silicate chemicals known as surface strengthening agents for concrete (for example, the brand name Crystal Sealer of Nikko Co., Ltd., which is an alkali silicate aqueous solution, or the brand name Ultra Ash manufactured by the same company) Etc.), epoxy resin that hardens by reacting with alkali components of concrete, etc. can be adopted, but in any case, the liquid can be maintained in the pipe body 3 and can be distributed over the entire pipe network 4. If the tube 3 is broken due to a crack, it will flow into the crack, or if the crack is fine Shall have the get property closing cracks by naturally cured or reacted to the product in it will, within the cracks oozed into the crack by capillary action in like.
[0013]
In order to incorporate the repair liquid supply mechanism 2 including the above-described pipe network 4 in the wall body 1, after the pipe network 4 manufactured in advance is placed in a mold for forming the wall body 1, It is only necessary to place concrete in the formwork.
[0014]
The wall body 1 incorporating the repair liquid supply mechanism 2 as described above has the pipe body 3 and the pipe network 4 formed thereby have the same brittleness as the concrete constituting the wall body 1. Therefore, as described above, when a crack occurs in an arbitrary portion of the wall body 1, the tube body 3 is also simultaneously broken at the crack occurrence portion. When the tube 3 is broken, the repair liquid R flows through the pipeline network 4 from each direction and flows into the crack from the broken portion C as shown by arrows in FIG. The repair liquid R hardens in the cracks, or reacts with moisture and alkali components in the concrete, so that the reaction product can automatically close the cracks. That is, the wall body 1 has a self-repairing function for cracks. Therefore, if such a wall body 1 is applied as a water blocking wall that requires a high level of water blocking, for example, the reliability of the water blocking performance can be secured for a long period of time, and is conventionally necessary. The inspection work for confirming the presence or absence of cracks and the repair work for the cracks discovered thereby are unnecessary, which is extremely effective.
[0015]
In addition, after the pipe body 3 is broken and crack repair is performed, the broken part C of the pipe body 3 is blocked by the repair liquid R flowing out from the broken part C. Therefore, the pipe body 3 thereafter. However, in the repair liquid supply mechanism 2 described above, the pipes 3 are assembled in a lattice shape to form the pipe network 4 as a whole. Even if it becomes impossible to flow, the repair liquid R can flow through the entire pipeline network 4 without any trouble, and therefore can be dealt with as it is even if cracks occur in other places.
[0016]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above, and appropriate design changes and various applications are possible. For example, as the material for forming the tube body 3 and the repair liquid R, it is naturally possible to employ materials other than those exemplified above as long as they have similar properties and functions. Moreover, the form of the pipe network 4 is not limited to the linear pipe bodies 3 assembled in a planar lattice shape as in the above-described embodiment, and for example, it may be assembled in a three-dimensional solid lattice shape. It is also possible to form a pipeline network in which a large number of tubular bodies that draw a free curve are randomly entangled two-dimensionally or three-dimensionally.
[0017]
Moreover, although the said embodiment is an example at the time of applying to the wall body 1, this invention can be widely applied to not only such a wall body 1 but various structures generally comprised with concrete, The form of the repair liquid supply mechanism 2 may be changed according to the form of the structure to be applied. For example, FIG. 3 and FIG. 4 show an example in which the present invention is applied to a pile head of a concrete pile 11, and in this case, a pipe network formed by assembling the tubular bodies 13 into a circular basket-like three-dimensional grid. The repair liquid supply mechanism 12 is configured by 14, and is arranged in a form in which the repair liquid supply mechanism 12 is mounted on the outside of the pile rebar 15 at the pile head. In this case, if the pile head is cracked due to the damage of a major earthquake, the pipe body 13 and the pipe network 14 are also broken along with it, and the repair liquid R flows out to plug the crack. Therefore, the structural strength and reliability of the pile 11 can be ensured.
[0018]
Further, in addition to the wall body 1 and the pile 11 described above, concrete structures that can be considered as objects of application of the present invention include columns, beams, panel zones that are their joints, roof slabs, floor slabs, outer walls, and underground outer walls. , Driving formwork, foundation, earthquake-resistant wall, continuous underground wall, etc. In addition, the concrete structures may be used for water storage tanks, waste storage facilities, radiation shielding walls, reactor containment vessels, road bridge decks, and the like.
[0019]
The concrete of the present invention can of course be built on site, but if the concrete of the present invention is manufactured as a precast product with a built-in repair liquid supply mechanism, mass production is possible and quality control is possible. Is also easier.
[0020]
In the above embodiment, the repair liquid supply tank is always connected to the pipe network and the repair liquid R is always supplied. However, after the repair liquid R is filled in the pipe network, the tank is removed. It is also conceivable that the repair liquid R is sealed in the pipeline network, and is appropriately replenished when the repair liquid R in the pipeline network is reduced. In that case, if the repairing liquid R is slightly pressurized and sealed in the pipeline network, the repairing liquid R will quickly flow out when the pipe breaks.
[0021]
Furthermore, if the repair liquid R is colored and it flows out of the pipe network and cracks are repaired, it can be easily confirmed that cracks are repaired and cracks are repaired. This can be easily confirmed visually.
[0022]
【The invention's effect】
As described above, sealant liquid supply mechanism of the present invention, sealant liquid throughout its a material having a concrete equivalent brittle is formed as a conduit network having a plurality of distribution channels allowing flow and repair liquid Is filled in the pressurized state in advance , so if the concrete is cracked simply by incorporating it in the concrete, the pipe network breaks at the crack occurrence point, and the repair liquid flows out from there. Thus, the crack can be closed by itself, and therefore the concrete having the self-repairing function of the crack can be realized by using this. Therefore, it is possible to ensure the reliability of the concrete in which it is built for a long period of time, and it is not necessary to carry out inspection work to confirm the occurrence of cracks and repair work for cracks that were found in the past. It is very effective.
Moreover, when the pipe network breaks and the crack repair is performed, the fractured portion is blocked and the flow of the repair liquid after that becomes impossible, but the repair liquid supply mechanism of the present invention has a plurality of flow paths. Since it is configured as a pipeline network having a route, even if the repair fluid flow path is partially blocked, the repair fluid can be circulated through the entire pipeline network through other flow channels without any problems. Therefore, even if cracks occur in other places after that, it can be dealt with as it is.
In addition, the concrete of the present invention has a self-repair function for cracks by incorporating the above-described repair liquid supply mechanism, and therefore, inspection work and crack repair work for confirming the occurrence of cracks are unnecessary. For example, it is particularly suitable when applied to a structural member that needs to ensure sufficient strength, a wall body that requires a high degree of water blocking, or the like.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment when the present invention is applied to a wall.
FIG. 2 is a perspective view of the same.
FIG. 3 is an elevation view showing an embodiment when the present invention is applied to a pile head.
FIG. 4 is a perspective view of the repair liquid supply mechanism.
[Explanation of symbols]
C Broken part R Repair liquid 1 Wall (concrete)
2 Repair fluid supply mechanism 3 Tube 4 Pipe network 5 Tank 11 Pile (concrete)
12 Repair fluid supply mechanism 13 Pipe 14 Pipe network

Claims (2)

It is a mechanism for repairing the crack by supplying a repair liquid to the crack occurrence location that is built in the concrete and generated in the concrete,
It is formed as a pipeline network having a plurality of flow paths through which the repair liquid can be circulated over the whole by a material having brittleness equivalent to concrete, and the repair liquid is preliminarily pressed over the entire pipeline network. The concrete repair liquid is characterized in that when the concrete is cracked, the pipe network breaks at the crack occurrence location and the repair liquid flows out from the fractured portion. Supply mechanism.  The concrete repair liquid supply mechanism according to claim 1 is built in, and when a crack is generated, the pipe network in the mechanism is broken at the crack occurrence location and the repair liquid is supplied, so that the crack itself Concrete characterized by being able to repair itself.

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