JP2003165759A - Material for repairing structure and repairing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material for repairing by filling cracks of a structure and a repairing method using the same, where even narrow spaces of cracks are easily filled and repaired and traces of repairing are hardly noticeable. <P>SOLUTION: The material for repairing consists of a blended powder of aggregate mainly comprising granulated blast-furnace slag particles, cement and a concrete admixture and has a maximum particle diameter of ≤0.5 mm, which is filled in cracks, compacted, finished to smoothen its surface and then an aqueous adhesive or an aqueous solution of the adhesive is sprayed to permeate and harden the compacted repairing material. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair material suitable as a material for repairing cracks formed on a wall surface of a concrete structure or a road surface of an asphalt road, and a repair method using the repair material.

[0002]

2. Description of the Related Art So-called putty (filler prepared by kneading chalk, chalk, zinc white, etc. with oil) has been widely used as a material for repairing cracks of this type.

[0003]

However, since the putty is a viscous material, there is a problem that it is difficult to completely fill the cracks. In addition, there are many complaints that the traces of repair often remain, and the repair work is not easy and often requires skill.

Therefore, the present invention provides a repairing material and a repairing method for a structure which has a good filling property and can be easily repaired even when a gap such as a crack is narrow, and in which a trace of repairing is inconspicuous. Has an aim.

[0005]

[Means for Solving the Problems] A repair material for a structure according to the present invention comprises an aggregate mainly composed of granulated slag particles, a cement, and
It is characterized by being made of mixed powder with concrete admixture. The repair material of the present invention is used by being filled in a crack, and when it is mixed with water or a water-based adhesive, it cures and adheres to a structure, thereby repairing the crack. Since this repair material is a powder, it is easy to be completely filled in the cracks and the surface can be finished smoothly. Therefore, the repair work is easy and the traces of the repair are inconspicuous. Considering good filling properties into cracks, the maximum particle size of the repair material of the present invention is 0.5 mm.
The following is desirable.

Since the granulated slag particles of the aggregate are porous, the repair material as a whole has sufficient water permeability. Therefore, water or an aqueous adhesive easily penetrates and the repair material is sufficiently cured. It Granulated slag is manufactured by quenching molten slag produced in a blast furnace with water. For example, it can be obtained by injecting a predetermined amount of water and a predetermined amount of pressurized water into the molten slag. Depending on the water pressure and the amount of water under pressure, hard and heavy hard granulated slag and porous and light soft granulated slag can be produced separately. In the present invention, the soft granulated slag is preferably used.

Cement is hardened by water and functions as a binder for hardening a repair material and adhering to a structure. For example, Portland cement is preferably used. The blending ratio of cement to aggregate is sufficient if the cement functions as a binder, and the weight ratio of cement to the aggregate weight of 100 is 10 to 2
It is 0, preferably 15-18.

On the other hand, the concrete admixture is a material which contributes to the improvement of strength, and the mixing ratio of the concrete admixture to the aggregate is 100: weight ratio of the concrete admixture to 100.
It is 5 to 5, preferably 0.8 to 3.5. As the type of the concrete admixture, an expansive one is preferable since the internal stress can be reduced by the expansion effect and the crack of the repair material itself can be suppressed.
As the expansive concrete admixture, for example, a material containing free calcium oxide (expandable CaO) as a main component and also containing calcium silicate and a vitreous phase is suitable.
In such a concrete admixture, the crystal growth and crystal pressure of Ca (OH) ₂ generated by the hydration of expansive CaO serve as an expansion source and cancel the contraction when the concrete hardens. However, it is also possible to use a mixture of calcined lime or gypsum and an expansive material made of calcined lime, or to use the property that iron powder rusts and expands.

The repair material of the present invention may be mixed with an appropriate amount of an inorganic pigment or the like. As a result, since the surface of the aggregate is colored with the pigment, it is possible to make the trace of repair even more inconspicuous by using the repair material as, for example, the same color as the structure color or the same color system color. As a conventional coloring means, paint has been sprayed on the surface or the color of the aggregate has been selected. However, the former causes discoloration or decolorization, and the latter limits the color. However, if a pigment is mixed as in the present invention, such a problem does not occur, and repair with a desired color can be maintained for a long period of time.

Next, the structure repairing method of the present invention is a structure repairing method for filling a gap such as a crack formed on the surface of a structure to repair the structure smoothly. The repair material is filled in the gaps and compacted, and the surface is finished to be smooth, and then the compacted repair material is sprayed with a water-based adhesive such as an acrylic adhesive or an aqueous solution of the adhesive to penetrate it.
It is characterized by being cured after this.

According to the repairing method of the present invention, the repairing material exhibits good filling properties as described above, and since the surface is easily finished smooth, cracks and the like can be easily repaired and traces of repairing can be obtained. Is not noticeable. Further, when an aqueous adhesive that hardens the repair material or an aqueous solution of the adhesive penetrates into the repair material and hardens, a surface layer of the adhesive is formed on the surface of the repair material, and the repair state is strongly protected.

[0012]

EXAMPLES Next, the present invention will be described in detail based on examples. FIG. 1 shows a cracked road surface to be repaired.
The width of the crack is about 1 to 3 mm. First, granulated slag, Portland cement, concrete admixture, and an inorganic pigment of a color suitable for the road surface to be repaired, the weight ratio of Portland cement to the aggregate weight of 100 is 15.6, the weight ratio of concrete admixture Was 1.25 and the weight ratio of the inorganic pigment was 0.31 to prepare a repair material. The maximum particle size of this repair material was 0.5 mm.

In carrying out the repair, first, as shown in FIG. 1, the cracked portion was brushed off to remove stains. Then, as shown in FIG. 2, the repair material contained in the container was embedded inside the crack so as to be in an excessively large state. The repair material may be continuously discharged from a thin nozzle as illustrated. Next, as shown in FIG. 3, the repair material was embedded in the cracks while removing the extra portion of the repair material with a spatula. Subsequently, as shown in FIGS. 4 to 5, the repair material was compacted by tapping with a trowel, and the surface of the repair material was finished to be flush with the road surface.

Next, as shown in FIGS. 6 to 7, an aqueous adhesive solution was sprayed onto the surface of the compacted and smoothed repair material to penetrate the repair material. As the adhesive, "NS High Flex HF-1000" manufactured by Nippon Kasei Co., Ltd., which is commercially available as a mortar adhesive, is used.
On the other hand, it was diluted with water at a ratio of 2 to obtain an aqueous adhesive solution. After spraying the adhesive, it was cured until it was cured, and finally the repair material was cured. The curing time was 3 hours in summer fine weather.

FIG. 8 shows a state where the repair is completed. The repair material completely closed the cracks in a smooth state, the color of the repair material was similar to that of the road surface, and the trace of repair was not conspicuous, confirming that the repair condition was good.

[0016]

As described above, according to the present invention,
A repair material composed of a mixed powder of aggregates composed mainly of water granulated slag particles, cement, and a concrete admixture is filled in a repair part such as a crack, and water or an adhesive agent is permeated into the repair material. Since it is characterized in that it is hardened, there is an effect that good repair can be easily carried out in which traces of repair are inconspicuous.

[Brief description of drawings]

FIG. 1 is a photograph showing a preparatory stage of a repairing method according to an embodiment of the present invention.

FIG. 2 is a photograph showing a repair material filling step of the repair method according to the embodiment.

FIG. 3 is a photograph showing a process of removing the excess of the repair material in the repair method according to the embodiment.

FIG. 4 is a photograph showing a compaction process of a repair material of a repair method according to an example.

FIG. 5 is a photograph showing a state where compaction of the repair material by the repair method according to the example is completed.

FIG. 6 is a photograph showing an adhesive spraying step of the repairing method according to the example.

FIG. 7 is a photograph showing a state in which the application of the adhesive by the repair method according to the example is completed.

FIG. 8 is a photograph showing a completed state of the repair method according to the example.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) C04B 18:14 C04B 22:06 Z 22:06 22:04 22:04 14:02 A 14:02) 111: 72 111 : 72 (72) Inventor Fumihiko Kobayashi, 557 Tode, Kumagaya, Saitama Sanwa Grand Co., Ltd. (72) Inventor Yoshihiro Moriyama, 557, Tode, Kumagaya, Saitama Sanwa Grand Co., Ltd. F-term (reference) 2D051 AC02 AD01 AD07 AF02 AF05 AF15 AH02 AH03 EA06 EB04 EB06 2D053 AA14 AD01 AD03 2E176 AA01 BB15 4G012 PA02 PA29 PB02 PB03 PC09 PC11 PE04

Claims (5)

[Claims] 1. A repair material for a structure, comprising a mixed powder of an aggregate mainly composed of granulated slag particles, cement, and a concrete admixture. 2. The mixing ratio is such that the weight ratio of the cement is 10 to 20 and the weight ratio of the concrete admixture is 0.5 to 5 with respect to 100 of the weight of the aggregate. The repair material for the structure described in 1. 3. The repair material for a structure according to claim 1, wherein the maximum particle diameter is 0.5 mm or less. 4. The structure repair material according to claim 1, further comprising an appropriate amount of pigment mixed therein. 5. A method for repairing a structure by filling a gap such as a crack formed on the surface of the structure to repair the structure smoothly, wherein the repair material for the structure according to any one of claims 1 to 4 is used. A structure characterized by filling the gap and compacting and finishing the surface smooth, and then spraying a water-based adhesive or an aqueous solution of the adhesive on the compacted repair material to infiltrate it, and then curing. Repair method.