JPS61117367A - Injection of adhesive - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of injecting an adhesive, and more specifically, to a part of a building or structure where concrete, mortar, etc. lifts from the building frame or cracks. The present invention relates to a method for automatically injecting adhesive without requiring human intervention.

Conventional technology and problems to be solved.

Usually, the interior and exterior finishes of buildings and structures are plastered with concrete or mortar, or tiled or stoned. However, as the mortar, tiles, etc. age, they may become detached from the underlying structure or develop defects such as cracks.

In general, floating mortar etc. can be easily detected by percussing it with a test hammer based on the difference in sound. However, defects such as floating or cracking in the conocrete or mortar of such buildings and structures may cause secondary disasters such as becoming a path for rainwater to enter or falling off.

Therefore, recently, as one of these maintenance methods, adhesive is injected into the cavities of cracks or floating parts of concrete or mortar, etc. to fill the cracks and restore the bond between the underlying structure and the mortar. It is being said. Such restoration repair methods are normal.

The method of construction is to use mortar, tiles, etc. to identify any floating areas, create an adhesive injection opening, and then inject adhesive into the opening using a grease gun. however,
This injection method using a grease gun injects the adhesive in a short time and under high pressure, so the air in the crack or floating cavity is compressed and injected, making it possible to inject the adhesive into the details of the crack or floating area. If this is not possible, or if the injection pressure is released after injection, the adhesive that has been injected so far will flow back, staining the area around the injection opening and the wall surface, and making it impossible to completely repair cracks and floats. In order to solve this problem, the adhesive can be injected under low pressure over a long period of time, but in this case, the injection process takes time, which poses a problem in terms of productivity.

On the other hand, a method has also been implemented in which the adhesive is contained in a rubber balloon and the adhesive is injected using the contraction pressure of the rubber. However, when a large amount of adhesive is contained in a rubber balloon, the adhesive can be easily injected by the contraction pressure of the rubber, but when the amount of adhesive is small, the injection pressure becomes weaker and the injection process is insufficient. Furthermore, if the adhesive is a reaction-curing type of epoxy resin, for example, the viscosity of the adhesive will be high, and its injectability (injection speed) will be reduced.

The inventors of the present invention have carried out intensive research to solve the problems of such injection repair methods, and as a result, the inventors have found that by applying a certain pressure gas to a flexible and deformable adhesive container and causing it to deform under pressure, The present inventors discovered that adhesive can be automatically and gradually squeezed out from a container, and that even a small cylinder can be used as a vaporized gas source container to sufficiently fill the adhesive, leading to the completion of the present invention.

That is, the present invention provides a method for repairing cracks or floating parts of concrete or mortar by injecting an adhesive into the cracks or floating parts. The nozzle of a flexible and deformable adhesive container fitted into a cylindrical pressure-resistant container is inserted into the injection hole of the cap body, and the adhesive container is held in an airtight atmosphere. However, the present invention provides an adhesive injection method characterized in that a pressure gas is applied to the adhesive container to press and deform the adhesive, and the adhesive is squeezed out while being injected into the crack or floating portion.

Next, the adhesive injection method according to the present invention will be described in detail based on the accompanying drawings.

The method of the present invention can be carried out using, for example, the injection apparatus shown in FIGS. 1 and 2 and according to the operating procedures (i to 2) shown below.

1) After visually inspecting and percussing the cracks or floating areas B in the concrete or mortar wall surface A of the building or structure, use a drill to drill into the cracks or floating areas B.
An injection opening C is provided that typically has a diameter of 4 to 10 Trr1n and reaches the main body. If necessary, clean the inside of the opening C by removing drill bits with a brush or thin metal fittings.

Especially in the case of crack part B, the injection opening C is 20 to 30
Seal the surface of the cracked part with cement, epoxy resin adhesive, hot melt adhesive, etc. to prevent the adhesive to be injected from flowing out, leaving an injection opening C at a ratio of one per 011 interval. to create an injection opening C.

11) Next, insert a nozzle butt body 1 for adhesive injection into the opening C (this has an injection hole 2 passing through the center)
Paste. In this case, a suitable adhesive (for example, a fast-curing epoxy resin adhesive, a modified acrylic adhesive, etc.) may be used.

111) After that, after the adhesive on the cap body 1 has hardened and the cap body 1 will not fall, apply an injection adhesive (for example, epoxy resin adhesive, acrylic resin adhesive, urethane resin adhesive). The nozzle 4 of a flexible and deformable adhesive container 3 (e.g. a plastic or rubber tube container) containing a liquid (not shown) (e.g., polymer cement slurry, etc.) is inserted into the injection hole 2 of the cap body 1.

(2) Next, a cylindrical pressure-resistant container (for example, a cylindrical pipe, preferably a transparent plastic pipe whose inside can be seen through) 5 into which the adhesive container 3 is fitted is connected and engaged with the opening body, and then the pressure-resistant container 5 A partition plate 7 having an insertion hole 6 is fitted and engaged with the open end of the adhesive container 3 to hold the adhesive container 3 in an airtight atmosphere. Next, a vaporizable liquid (Ri1), for example N
After inserting the nozzle 9 of the cylinder 8 filled with gas (2, CO2, fluorocarbons, chlorinated hydrocarbon diether, etc.) into the hole 6, the airtight sealing lid 10 is engaged and fixed to the partition plate 7. The injection device is assembled in this way (see FIG. 2).

(2) Tighten the sealing lid 10 and move it forward toward the cylinder to press the nozzle 9 of the cylinder 8 and blow out the vaporized gas. In this case, the pressure of the vaporized gas is usually 2
It is sufficient to set it to about 7 K9/d. This vaporized gas pressure deforms the adhesive container 3 under pressure, and the injection adhesive is squeezed out from the container 3 and injected into the crack or floating portion B through the opening C. Note that various shapes such as a bellows-shaped container 3A or a sausage-shaped container 3B shown in FIG. 3 may be used as the flexible and deformable adhesive container.

The method of the invention can also be carried out using the injection device shown in FIG. 4 as a modified array.

First, one convex mortar body having an injection hole 2 is attached to an injection opening C provided in a crack or floating part B of a concrete or mortar wall surface A, and the nozzle 4 of the adhesive container 3 is applied. Insert into the injection hole 2 of the mortar body LA. Next, after the pressure container 5A is connected and engaged with the convex portion of the pressing body IA, a partition plate 7A that can be slid easily is installed on the inner wall of the pressure container 5A, and the adhesive container 3 is placed in an airtight closed atmosphere. to hold. After that.

A vaporized gas ejection chamber 11 is provided by fitting a sealing lid 10A to the open end of the pressure container 5A, and a cylinder 8A is connected to the chamber 11 via a hose 12. The vaporized gas ejected from the cylinder 8A fills the chamber 11 and causes the partition plate 7A to slide toward the adhesive container 3, thereby deforming the container 3 under pressure.
The injection adhesive inside can be efficiently injected into the crack or floating portion B. Thus, such a modification does not involve direct application of vaporized gas to the adhesive container to deform it.

The partition plate 7A is pressed against the adhesive container by the action of vaporized gas pressure, thereby deforming the container. In addition.

As pressure gas it is also possible to use vaporized gas pressure or compressed air supplied from a compressor.

According to the method of the present invention having the above configuration, the following advantages can be achieved.

■The pressure of the vaporized gas gradually increases, and the adhesive is injected slowly at first, then at a constant high pressure (9/ci from 2 to 7).
), so sufficient injection can be carried out.

And it is possible to inject even the smallest details.

■The adhesive is cooled by the heat of vaporization of the vaporizable liquid, delaying the reaction and hardening of the adhesive, so that the injection speed and amount do not decrease due to an increase in the viscosity of the adhesive. Continuous injection work is possible, and the adhesive can be injected to the smallest detail.

■If you make an injection opening in the crack or floating part, stick the mortar to it, and set it so that the adhesive can be injected, the injection can be done automatically without changing hands, so it is a single operation. is easy and comfortable.

■Since the work can be continued under pressure until the adhesive is almost cured, there is no backflow of adhesive due to the internal pressure of the floating cavity even after the injection device is removed. Complete the injection work without contaminating the vine.

[Brief explanation of the drawing]

FIG. 1 is an exploded view showing one row of injection devices used in the method of the present invention, FIG. 2 is a schematic view showing the assembled state of the device, FIG. 3 is a schematic view showing another adhesive container, and FIG. FIG. 2 is a schematic diagram showing an assembled state of an injection device used in a modified example of the method of the present invention. t, tA: Nozzle stopper body, 3.3A, 3B: Adhesive container, 5.5A: Pressure-resistant container, 8.8A: Gas cylinder 1 other person

Claims (1)

[Claims] 1. In a method of repairing cracks or floating parts of concrete or mortar by injecting an adhesive, an adhesive injection opening is provided in the crack or floating part, and an opening for the adhesive injection is provided in the crack or floating part. A flexible and deformable adhesive container fitted into a cylindrical pressure-resistant container is inserted into the injection hole of the nozzle cap body, and the adhesive container is placed in an airtight atmosphere. A method for injecting an adhesive, which comprises applying pressure gas to the adhesive container while holding the adhesive container to deform the adhesive container, and squeezing out the adhesive while injecting the adhesive into a crack or a floating part. 2. The method according to item 1 above, wherein the pressurized gas is vaporized gas from a cylinder filled with a vaporizable liquid.