KR200189877Y1 - Nozzle for injecting ultra micro powder for repairing crack - Google Patents

Abstract

The present invention relates to an injection nozzle for injecting a water-infused injection liquid into the ultra-fine crack reinforcement pulverized cement, ceramic and various admixtures.

The ultra fine crack reinforcing material is composed of ultra fine particles cement, ultra fine ceramic and various admixtures, and the average particle diameter of each component is less than 0.1 ~ 4㎛ to penetrate into fine cracks. You can mix and use.

Ultra-fine crack reinforcement material is cheaper than conventional epoxy, and the particles are small, easy to fill even minute cracks, resistant to high temperature, excellent fire resistance, there is no shrinkage and change of material has a semi-permanent crack reinforcement effect. In addition, it can be applied to cracks that are water-resistant and are likely to leak. In addition, it is a premixed type that can be mixed with water at the required concentration in the field.

The injection nozzle of the present invention prevents leakage of the injection liquid by using a sphere or a packer, and is easy to install and reused many times. In addition, it is possible to inject the injection liquid at a desired pressure by using a hydro piston pump using a packing of excellent elasticity.

Description

Nozzle for injecting ultra micro powder for repairing crack}

The present invention relates to a nozzle for injection of ultra-fine crack stiffener. More specifically, the present invention relates to an injection nozzle for injecting a water-infused injection liquid into an ultrafine crack reinforcing material obtained by grinding cement, ceramic, and various admixtures.

In general, a concrete structure is likely to be cracked on the inside or outside of the structure due to various factors such as dry shrinkage, temperature change and leakage of concrete. In addition, if the place where a lot of load is applied, such as the basement parking lot floor or where the construction of the waterproof layer and the finishing concrete layer is poor in the general floor slab, the finishing concrete layer is often lifted even if not exposed to the outside of the structure. In the case of cracks caused by normal dry shrinkage of concrete, most of the cracks have no effect on the structure, but the extent of the dry shrinkage is too severe, and cracks caused by other factors have serious adverse effects on the structure as follows.

Moisture and air are easily introduced into the cracks and excited parts generated in the above-described structure, and the introduced moisture and air promote weathering of the concrete of the structure and cause corrosion of reinforcing steel, which is fatal to the life and safety of the structure. Will be affected.

As a repairing method for the cracks and the excited parts, a method of injecting organic products such as epoxy, urethane, and silicon is widely used.

The method of injecting organic products oxidizes with air after a long time after injection, decreases adhesive strength, changes in volume, easily causes cracks in cracks, and may burn and disappear in case of fire. In addition, even if only a little moisture in the injection part is difficult to harden the role of the reinforcement to perform the role as a reinforcement, and the price is expensive, so it has some limitations in terms of economics for general application as a building material.

It is an object of the present invention to provide a nozzle for injection of ultra-fine cracked reinforcement material which is not only resistant to high temperatures and excellent in fire resistance, but also material-friendly and inexpensive with inorganic materials such as structures.

Another purpose of the present invention is to completely fill the fine cracks, pre-mixed type (pre-mixed type) of the ultra-fine crack reinforcement material can be used to adjust the concentration of the injection solution stirred water as needed to meet the degree of cracking in the field It is to provide a nozzle for injection of ultra-fine crack stiffener.

1 is a cross-sectional view and a bottom view of the injection nozzle of the present invention.

2A is a side view of an injection nozzle without a packer attached.

2B is a side view and a sectional view of an injection nozzle with a packer.

3 is a sectional view of a hydro piston pump.

Brief description of the symbols in the drawings>

1, 11: injection nozzle 2: injection tube

3: spherical insert 4: round plate

5: old 6: spring

7: plug 8: round rib

9: contact hole 10: nipple

12: Appearance 13: Turning

14: slit 15: inner tube

16: nut 17: external contact

18: Packer 20: hydro piston pump 21: suction part 22: cylinder

23: Packing

The ultra fine crack reinforcing material is mixed with the ultra fine particle cement having an average particle diameter of less than 0.1 to 4 μm and the ultra fine particle cement, and is 0.9 to 1.6 times the weight of the ultra fine particle cement and is composed of the ultra fine ceramic having an average particle diameter of less than 0.1 to 4 μm. The ultra-fine particle cement may be used commercially available fine particle cement, when the fine particle cement is larger than the desired particle diameter can be used by grinding the existing cement using a ball mill, jet mill or ultrasonic vibration mill. The ultrafine ceramics may use alumina, gypsum, and elvan, and any ceramic material may be used. The ultrafine ceramics may be pulverized with a ball mill, a jet mill, or an ultrasonic vibrating bill together with the ultrafine cement.

Ultra fine crack reinforcing material can be used by further mixing various admixtures to further improve the performance. The admixture is composed of a fluidizing agent, an expanding agent, and an adhesive, and may be used by adding or deleting components of the admixture or adjusting the composition ratio of the components as necessary. The fluidizing agent is 0.1 to 3% by weight based on the weight of the ultrafine crack reinforcing material, the average particle diameter is 0.1 to 4㎛, it is preferable to use a naphthalene sulfonate-based surfactant as a main component. The swelling agent is 0.0005 to 0.003% by weight relative to the total weight of the ultrafine crack reinforcing material, the average particle diameter of 0.1 to 4㎛, it is preferable to use aluminum as a main component. The adhesive is 0.5 to 3% by weight based on the total weight of the ultrafine crack reinforcing material, the average particle diameter is 0.1 to 4㎛, it is preferable to use ethylene vinyl acetate as a main component.

1 is a cross-sectional view and a bottom view of the injection nozzle of the present invention, the injection nozzle (1) of the present invention is for injecting the injection liquid stirred water to the ultra-fine crack reinforcing material, the injection nozzle (1) Consists of a nipple 10, a sphere 5, a spring 6 and a stopper 7.

The nipple 10 has a circular plate 4 integrally formed at the end of the old insertion part 3 of the circular pipe divided into the injection tube 2 and the old insertion part 3, and the old insertion part 3 The inner diameter and the outer diameter of the larger than the injection pipe (2), the circular plate 4 has a hole coinciding with the inner diameter of the old insertion portion (3) is formed integrally with the end of the old insertion portion (3) A plurality of contact holes 9 and a plurality of circular ribs 8 are formed on the bottom surface so as to facilitate attachment to the cracks.

The sphere 5 is smaller than the inner diameter of the sphere insertion unit 3 and larger than the inner diameter of the injection tube 2, and is inserted into the sphere insertion unit 3 through the hole of the circular plate 4.

The spring 6 is inserted into the sphere inserting portion 3 into which the sphere 5 is inserted through the hole of the circular plate 4 so that the sphere 5 blocks the hole of the injection tube 2. 5) Support.

The stopper 7 has a hole formed in the center, and serves to block the hole of the circular plate 4 after the spring 6 is inserted into the hole of the circular plate 4.

The injection nozzle 1 is mainly used for cracking the bottom of the slab, the pillar and the wall, and the sphere 5 serves to prevent the injection liquid from flowing backward. In addition, it is usually made of plastic or resin to facilitate removal after injection of the injection liquid.

Concrete crack repair and reinforcement method using the injection nozzle (1) is as follows.

First, in consideration of the degree of cracking of the structure is mixed with water in a certain ratio to the ultra-fine crack stiffener to make a stirred injection liquid. A plurality of holes are drilled at predetermined intervals in the crack portion of the structure, and the holes are removed using a vacuum cleaner or the like. The crack is sealed, and then, the injection nozzle 1 is provided in the perforation part, and water is injected into the hole through the injection nozzle 1 provided to keep the crack in a wet state. After the injection liquid is injected into the injection nozzle 1 using a pump or a grease gun, and the like is maintained for a predetermined time and the injection nozzle 1 is removed, the crack of the structure is completely filled with the injection liquid. As long as the life of the structure is maintained, the cracks are filled and reinforced.

FIG. 2A is a side view of the injection nozzle without a packer, and FIG. 2B is a side view and a cross-sectional view of the injection nozzle with a packer. The injection nozzle 11 of the present invention includes an inner tube 15, an exterior 12, and a packer. It consists of 18.

The inner tube 15 has a hollow circular pipe shape, and at one end is integrally formed or attached to the exterior contact portion 17 whose outer diameter gradually increases toward the end portion thereof, and is formed along the outer circumference at the opposite end thereof. The nut 16 is fastened to the external thread.

The exterior 12 is slightly larger than the outer diameter of the inner tube 15 and smaller than the outer diameter of the outer contact 17, so that the outer contact 17 and the nut 16 of the inner tube 15 are exposed at both ends. A plurality of slits 14 are inserted, cut from the center to one end, are formed along the circumference of the cylinder, and the projections 13 are formed along the outer circumference at the opposite ends. When the nut 16 of the inner tube 15 is tightened, the exterior contact portion 17 of the inner tube 15 gradually enters the interior of the exterior 12, and pushes open the inner wall of the exterior 12. Play a role.

The packer 18 is cylindrical in shape and is inserted in close contact with the outer surface 12 except for the protrusions 13. The packer 18 may be used as long as it is a material having elasticity such as rubber or resin, and seals a gap between the injection nozzle 11 and the perforation so that the injection liquid does not leak.

Concrete crack repair reinforcement method using the injection nozzle 11 is as follows.

First, in consideration of the degree of cracking of the structure is mixed with water in a certain ratio to the ultra-fine crack stiffener to make a stirred injection liquid. A plurality of holes are formed by drilling the cracks of the structure at predetermined intervals, and impurities are removed by using a vacuum cleaner or the like in the holes. Subsequently, the injection nozzle 11 is installed in the hole, but the external appearance 12 of the injection nozzle 11 is fixed and the nut 16 of the inner tube 15 of the injection nozzle 11 is tightened. The outer wall of 12 compresses the packer 18 of the injection nozzle 11 so that the packer 18 is in close contact with the hole. Water is injected into the hole through the injection nozzle 11 to maintain the crack in a wet state, and the hydro piston pump 20 is connected to the injection nozzle 11 with a hose. The hydro piston pump 20 sucks the injection liquid and injects the injection liquid into the crack through the hose and the injection nozzle 11, and then the inner tube 15 of the injection nozzle 11. Loosen the nut 16 and pull out the injection nozzle 11 from the hole. In addition, the seal is completely reinforced if the injection nozzle 11 is removed and the perforation is sealed and retained for a predetermined period of time. The injection nozzle 11 is mainly used where the finishing concrete is excited in the floor slab or underground parking lot that requires high pressure injection, and can be injected without leakage of the injection liquid due to the packer 18, and the injection The nozzle 11 can be taken out and reused after injection. In addition, the hydro piston pump 20 may use a conventional pump, but if the ultra-particulate crack reinforcing material is blocked between the packing 23 of the suction part 21 and the wall of the cylinder 22 or of the cylinder 22. When the operation is not smooth, the packing 23 may be made of a material such as acetylene resin having excellent elasticity, sealing property and durability.

In the above-described concrete crack repair reinforcement method, in order to reinforce fine cracks first and to reinforce wide cracks, an injection liquid containing about 1 to 1.5 times of water is injected into the initial stage of the injection in order to reinforce the wide cracks. After filling the fine cracks first, the amount of water may be gradually reduced to inject the amount of water to about 0.3 to 0.8 times the weight of the total concrete cracking reinforcement. This is because the concentrated injection liquid may not be filled in the fine cracks.

Referring to the embodiment of the present invention actually made a test body and a comparative example that can be compared with the above examples.

Comparative Example 1

Sample preparation is as follows.

First, prepare a concrete specimen of 300 × 300 × 100 (unit: mm) and insert wire mesh. The prepared specimen is hammered with a hammer to form a crack having a width of about 0.3 mm, and the circumference of the broken specimen is tightened with a steel band. The upper, lower and side surfaces of the crack are sealed. The sealed specimen is installed on the test bench, and the injection nozzle of the present invention is installed on the specimen. Two or three outlets with a perforation diameter of 1-2 mm are to be installed to confirm injection and maintain pressure in the crack.

500 g of ordinary Portland cement, 500 g of ceramic, 20 g of naphthalene sulfonate-based surfactant, 0.005 g of aluminum, and 5 g of ethylene vinyl acetate were mixed and pulverized by a ball mill to prepare an ultrafine crack reinforcement material having an average particle diameter of 8 μm, followed by stirring with water 550 g. Prepare a liquid. In particular, water is not injected through the injection nozzle before injection of the injection liquid. The prepared injection liquid is injected at a pressure of 2 to 3 kg using a general syringe pump. As described above, 3 days after the injection, the test body was destroyed and visually confirmed, and no injection liquid was injected at all.

Comparative Example 2

The ultrafine particle crack reinforcement of Comparative Example 1 was carried out in the same manner as in Comparative Example 1 except that the average particle diameter was 4 µm. As a result of the test, only about 30mm wide crack and about 30mm around the injection nozzle were injected.

Comparative Example 3

The ultrafine particle crack reinforcing material of Comparative Example 1 was carried out in the same manner as in Comparative Example 1 except that the average particle diameter was 2 μm. As a result of the test, no crack was inserted in the crack less than 0.1mm in width.

Comparative Example 4

It was carried out in the same manner as in Comparative Example 1 except for using a general cement instead of the ultra-fine crack stiffener of Comparative Example 1. The test showed no injection at all.

Comparative Example 5

Except for using an epoxy instead of the ultra-fine crack reinforcement of Comparative Example 1 was carried out in the same manner as in Comparative Example 1. The test resulted in the injection and hardening up to the minute crack, but the injected epoxy was ignited and burned about 4 seconds later.

Comparative Example 6

30 minutes before the injection, water was first injected to carry out the same method as Comparative Example 5 except that the crack was kept in a wet state. As a result of the test, even the fine crack was injected well, but after about 3 days, the epoxy was injected into the crack due to the hardening.

Example 1

Before the injection of the injection solution was carried out in the same manner as in Comparative Example 3 except that water is injected through the injection nozzle to maintain the humidity in the parent cracks. As a result of the test, the injection was well up to the crack of less than 0.1mm in width.

Example 2

After excavating the pressed concrete on the floor of the parking lot with a diameter of 13 mm and 500 to 1,000 mm intervals, 5,000 g of ordinary Portland cement, 5000 g of ceramic, 200 g of naphthalene sulfonate-based surfactant, 0.05 g of aluminum, and 50 g of ethylene vinyl acetate were mixed. After grinding with a ball mill to prepare an ultra-fine particle reinforcing material having an average particle diameter of 2㎛, and 5,500g of water is stirred to prepare an injection liquid. Subsequently, the injection liquid is injected into a general hydro piston pump. Test results showed that the metal packing of the piston of the cylinder of the hydro piston pump generated heat, and the injection liquid stuck to the cylinder wall, causing it to fail. This is because the particle size of the ultrafine crack stiffener is too fine to penetrate between the metal packing and the cylinder.

Example 3

The same method as in Example 2 was performed except that the packing 23 using an acetylene resin was used instead of the metal packing of Example 2. As a result of the experiment, the pump of the cylinder 22 was smooth and the injection was confirmed by the Al radar and the core collector.

When analyzing the test results of the comparative examples and examples described above, in order to fill the cracks less than 0.1mm in width, ultra-fine crack reinforcement having an average particle diameter of about 2㎛ is required. In addition, considering that the cracks generated in the structure of the building generally have moisture due to leakage, etc., when the conventional epoxy is used as the injection liquid, the epoxy may not be cured. It is easy to ignite fire. The ultra-fine crack reinforcement which solves these problems requires some moisture during hardening and uses almost the same inorganic material as the structure, so it is material friendly and resistant to high temperature and fire.

Ultra-fine crack reinforcement material is cheaper than conventional epoxy, and the particles are small, easy to fill even minute cracks, resistant to high temperature, excellent fire resistance, there is no shrinkage and change of material has a semi-permanent crack reinforcement effect. In addition, it can be applied to cracks that are water-resistant and are likely to leak. In addition, it is a premixed type that can be mixed with water at the required concentration in the field.

The injection nozzle of the present invention prevents leakage of the injection liquid by using a sphere or a packer, and is easy to install and reused many times. In addition, it is possible to inject the injection liquid at a desired pressure by using a hydro piston pump using a packing of excellent elasticity.

Claims (1)

The circular plate 4 is integrally formed at the end of the old insertion part 3 of the circular tube divided into the injection tube 2 and the old insertion part 3, and the internal diameter and the external diameter of the old insertion part 3 are A nipple (10) larger than the injection tube (2), the circular plate (4) having a hole coinciding with the inner diameter of the old insertion section (3) integrally with an end of the old insertion section (3); A sphere (5) inserted into the sphere inserting portion (3) through the hole of the circular plate (4); The sphere 5 is inserted through the hole of the circular plate 4 into the sphere insertion portion 3 into which the sphere 5 is inserted to support the sphere 5 so that the sphere 5 blocks the hole of the injection tube 2. A spring 6; And, A stopper (7) blocking the hole of the circular plate (4) after the spring (6) is inserted into the hole of the circular plate (4); Injection nozzle, characterized in that consisting of.