JP2011214223A - Construction method for filling core hole of concrete structure with filler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for filling a core hole of a concrete structure with a filler, which enables simple and rapid preparation of the inorganic filler.SOLUTION: A cartridge houses a cylinder 1 which has a nozzle 11 at one end, a piston wall 2 movable toward a spout at the leading end of the nozzle 11 in the cylinder 1, and a mixed powder of a hydraulic composition and a thickener, which is stored as a mixture for the inorganic filler in the cylinder 1. In the construction method for filling the core hole of the concrete structure with the filler, a liquid is introduced into the cartridge from the spout; vibrations are applied to the cartridge; the mixture for the inorganic filler and the liquid are agitated and mixed together so that the inorganic filler 10 can be prepared in the cartridge; and the piston wall 2 is shifted to the spout side so as to infill the inorganic filler 10 into the wet or dry core hole from the spout.

Description

  TECHNICAL FIELD The present invention relates to a method for filling a core hole filling material for a concrete structure, and in particular, when an anchor or core hole is filled using an inorganic filling material having a specific composition, the filling is efficiently performed without causing sagging. The present invention relates to a simple filling method of a core structure filling material for a concrete structure.

The concrete structure needs to be filled with a material in the generated core hole such as a core hole after the concrete core is taken out for strength measurement or a post-installed anchor.
Since core holes and post-construction anchors are performed everywhere in the structure, filling is performed in all directions such as downward, lateral, and upward.
A concrete drill or a core drill is used to open the core hole. Usually, the concrete drill is dry, and the core drill is wet. The core hole is both dry and wet. Furthermore, in the case of outdoors, the state of the core hole changes depending on the weather.
In addition, in order to fill the core hole with the cement-based material, it is necessary to fill the core hole from behind the core hole using a long nozzle, a pipe, or the like.

The material injected into the core hole provided in the concrete structure can be broadly classified into an inorganic material and an organic material, and there are a capsule type and an injection type as construction forms.
As the core hole filling material, the more flexible the component is, for example, the easier it is to embed anchor muscles. On the other hand, when the filling material is filled with a soft filling material, the core hole is easily sagged.
If sagging of the core hole filling material occurs from the core hole, the adhesion with the concrete structure becomes poor, and for example, the anchor bars may fall off.
Further, the core core filling material that is dripped adheres to the periphery of the structure and needs to be cleaned.

In particular, when the core hole filling material is applied upward, the entrance of the core hole is temporarily sealed or, for example, a sagging prevention cap-shaped instrument is attached to the anchor bar. It is necessary to temporarily fix with a tape or a belt until the core hole filling material is hardened so that the anchor line does not come off.
In addition, for the capsule type, which is an inorganic capsule material, where cement and water are separated and stored in a glass tube, water glass is added to the water to prevent sagging during upward construction, increasing the viscosity and making it difficult to droop. Yes.

Conventionally, when preparing mortar or the like as an inorganic filling material, powder such as cement and water are weighed to a certain ratio and stirred and mixed by a mixer, kneading scoop or scoop, or hand kneading. Then, it was prepared and applied with a brush, a spatula, a trowel, or a pump.
In such a preparation method, since powders such as water and cement need to be weighed, it is necessary to prepare a separate mixing container, which is not a simple method.
Also, in the construction method, after inserting the material into the core hole, the core hole is pushed several times with a stick etc., so there is a case where there is a cavity inside and not fully filled, In addition, a small amount of construction on a small part such as a joint is time-consuming and complicated, and particularly upward construction is difficult, and it is difficult to perform uniform construction.

  Adhesive fillers are mainly used as organic fillers. However, if the core hole is in a wet state, there is a problem with adhesiveness, and the core hole cannot be filled sufficiently, causing sagging. May end up.

  On the other hand, as a simple discharger, in Japanese Patent Laid-Open No. 5-319462 (Patent Document 1), a mixed discharge container main body is filled with a main agent and at the same time a curing agent is contained in a synthetic resin bag. In addition, the container body has a hollow stirring bar, stirring blades, and a slidable bottom plate, while a thread is fixed to one end of the synthetic resin bag, and the thread is in the hollow stirring bar. It is fixed to the container cap, and by pulling this cap and raising and lowering the stirring rod and stirring blade, the synthetic resin bag is torn and both components can be mixed uniformly in a short time, so that they are discharged from the bottom. A simple mixed discharge container is disclosed.

However, such a simple discharger is provided with a stirring bar inside, and the mixed discharge container body is prefilled with a plurality of components to be mixed, for example, a first component and a second component. It is.
A discharger having a structure including such a stirring bar has a complicated apparatus structure, and when a plurality of components to be mixed, for example, a first component and a second component are filled in advance, the weight increases. Also, it takes time and effort to carry it, and therefore it becomes expensive.

  JP-A-2004-189309 (Patent Document 2) discloses a blend mainly composed of cement and aggregate and an inorganic filling repair material using water, and the cement and aggregate are the main components. The composition to be filled is put in a filling repair container, the water is put in a water container and sealed, and the water container is put in the filling repair container and fixed to the inner wall of the filling repair container The filling and repairing container is hermetically sealed, the filling and repairing container and the water container are made of a material having no water permeability and air permeability, and at least a part of the filling and repairing container is transparent, and the material of the water container An inorganic filling repair material characterized in that its mechanical strength is weaker than that of the filling repair container is disclosed.

  However, no sagging of the filling material occurs in the core hole in any direction, and it is difficult to reliably fill the core hole deeper.

JP-A-5-319462 JP 2004-189309 A

The purpose of the present invention is to allow an inorganic filler to be prepared quickly and easily, and whether the core hole of a concrete structure is wet or dry, without causing dripping, upward, It is an object of the present invention to provide a method for filling a core hole filling material of a concrete structure, which can efficiently and easily apply the core hole filling material, regardless of whether the filling is performed in a lateral direction or a downward direction.
Furthermore, the object of the present invention is to use an inorganic filling material cartridge to perform the stirring and mixing operation and filling operation of the inorganic filling material in the same container, to suppress the generation of dust during the stirring and mixing operation to almost zero, and to wet It is an object of the present invention to provide a method for constructing a core hole filling material for a concrete structure, which can easily fill a core hole in a state or a dry state in an arbitrary direction such as upward, lateral, downward.

  In order to solve the above-described problems, a method for filling a core structure filling material for a concrete structure according to the present invention includes a cylinder having a nozzle at one end, and a movable inside the cylinder toward a discharge port at the tip of the nozzle. Liquid is introduced from the discharge port into a piston wall and a cartridge containing a mixed powder of a hydraulic composition and a thickener as a mixture for an inorganic filler in the cylinder. Vibration is applied, and the mixture for inorganic filler material and the liquid are agitated and mixed to prepare an inorganic filler material in the cartridge. 2.0% by mass, the water / mixed powder mass ratio is 13 to 50%, and then the piston wall is moved to the discharge port side to wet or dry the inorganic filler from the discharge port. Specially filling the core hole This is a method for filling a core hole filling material of a concrete structure.

Preferably, in the method for filling the core hole filling material of the concrete cultivated material of the present invention, a fine aggregate is further contained in the mixture for the inorganic filling material of the cylinder 1. It is a filling construction method of a core hole filling material of a concrete structure.
More preferably, in the method for filling the core hole filling material of the concrete structure of the present invention, the cylinder filling material is filled with the mixture for inorganic filling material biased toward the piston wall side. A cartridge in which a cavity is formed between the inner surface of the cylinder on the discharge port side and the end surface of the filled mixture for inorganic filler material is used.

Preferably, in the method for filling the core hole filling material of the concrete structure according to the present invention, the liquid in which the volume of the cavity of the cartridge reacts with the filled inorganic filler filling material is discharged. It is characterized by being larger than the volume to be introduced via the outlet.
More preferably, the method for filling the core hole filling material for a concrete structure according to the present invention is characterized in that the piston wall of the cartridge has a shape in close contact with the inner surface of the cylinder.

More preferably, in the method for filling the core hole filling material of the concrete structure of the present invention, the liquid is introduced from the discharge port of the cartridge, and the cartridge is vibrated to give the liquid and the inorganic filling material. The material mixture is stirred and mixed, the piston wall is moved to the discharge port side, the discharge port at the tip of the nozzle is inserted into the inner part of the core hole, and the inorganic filling material is extruded from the discharge port. And
More preferably, in the method for filling the core hole filling material of the concrete structure of the present invention, when the inorganic filling material is extruded from the discharge port inserted in the deep part of the core hole, the cartridge is inserted. It is characterized by being mounted on a sealing gun.
Here, in the present invention, the “core hole” includes all holes and holes related to the concrete structure such as an anchor core hole and a core punched hole from the concrete structure for strength measurement.

According to the method for constructing a core hole filling material for a concrete structure according to the present invention, the core hole in any direction of the concrete structure is upward, downward regardless of whether the core hole is wet or dry. Regardless of the orientation such as the horizontal orientation, the inorganic filler can be easily and firmly filled up to the inside of the core hole, and the filled inorganic filler does not fall off.
Therefore, a special instrument for preventing sagging or a temporary fixing seal is not required.
Furthermore, for example, even after the anchor muscle is inserted, there is almost no disconnection due to the weight of the anchor muscle, and there is little need for temporary pressing until the anchor muscle stops moving, or it can be simple and reduce the work of temporary pressing. can do.
The construction method of the core hole filling material of the concrete structure of the present invention can be filled from the inside of the core hole using a long nozzle, and can be constructed in all directions such as top, side, and bottom, and the inside of the hole can be dried. Filling can be performed regardless of the wet state, and by using a caulking container or the like with a long nozzle, it becomes possible to work and construct more easily.

The core hole filling material of the concrete structure according to the present invention can be prepared easily when the inorganic filling material is to be applied, and the filling up to the inner part of the core hole can be carried out by an expert. Even without it, it can be easily constructed.
In addition, it is possible to easily prepare inorganic fillers at the construction site, without the need for special tools for preparing inorganic fillers, and by stirring easily by adding water and shaking the cartridge In addition, an inorganic filling material can be prepared, and the filling work can be easily carried out as it is.
In addition, since the inorganic filler is mixed and stirred in a sealed cartridge during construction, there is almost no dust generation, and the construction site is contaminated with dirt like a normal mixing container. Nor.
Thus, the construction method of the core hole filling material of the concrete structure of the present invention, particularly using the inorganic filler cartridge, construction that was not good with a trowel or spatula by the injection method with its attached nozzle, In particular, it is possible to simply carry out upward, oblique, and sideways construction.

It is sectional drawing which shows the form of one Example of the cartridge for inorganic type filling materials used for this invention. FIG. 1 schematically shows a state in which the nozzle of the inorganic filling material cartridge in FIG. 1 is removed, the aluminum sheet at the discharge port of the cartridge is broken, and a liquid that reacts with the mixed powder of the hydraulic composition and the thickener is filled. It is a figure of one Example shown in FIG. It is a figure which shows typically one Example of the form which constructs an inorganic type filling material with respect to the transverse core hole of a concrete structure using the sealing gun equipped with the cartridge for inorganic type filling materials applied to this invention. . It is a photograph figure which shows the state which filled the horizontal direction hole of the concrete structure with various inorganic type filling materials. It is another photograph figure which shows the state which filled the horizontal direction hole of the concrete structure with various inorganic type filling materials.

The method for filling a core structure filling material for a concrete structure according to the present invention will be described in detail below.
A method for filling a core structure filling material for a concrete structure according to the present invention includes a cylinder having a nozzle at one end, a piston wall movable in the cylinder toward a discharge port at the tip of the nozzle, In addition, a mixed powder of a hydraulic composition and a thickener that is a mixture for an inorganic filler, or a mixed powder and a fine aggregate of a hydraulic composition and a thickener that are a mixture for an inorganic filler, and Is introduced into the cartridge containing the liquid, and the cartridge is vibrated, the cartridge is vibrated, and the mixture for the inorganic filling material and the liquid are stirred and mixed, and the inorganic filling material is contained in the cartridge. The prepared inorganic filler contains 0.02 to 2.0% by weight of a thickener, the water / mixed powder weight ratio is 13 to 50%, and the piston wall is Move to the discharge port side and leave the discharge port The system filling material, filled into the wet or dry core hole, which is filled construction method.

An inorganic filler material cartridge used in the core hole inorganic filler material construction method of the present invention has a cylinder 1 having a discharge port 6 at one end, and is movable toward the discharge port 6 in the cylinder 1. The piston wall 2 and the cylinder 1 contain a mixed powder of a hydraulic composition and a thickener as a mixture for an inorganic filler. The cylinder 1 may contain fine aggregate in addition to the mixed powder.
Here, the mixed powder of the hydraulic composition and the thickener, or the mixed powder of the hydraulic composition and the thickener and the fine aggregate contained in the cylinder 1 are mixed with the inorganic filler mixture 3. Called.

FIG. 1 is a cross-sectional view showing an embodiment of an inorganic filler material cartridge used in the core hole filling method for an inorganic filler material according to the present invention.
As shown in FIG. 1, the cartridge includes a cylinder 1, a discharge port sealing aluminum sheet 4, a movable piston wall 2, and an inorganic filling material mixture 3.
The shape of the cylinder 1 is a cylindrical shape or the like, and the shape in which the distance that the piston wall 2 can move in the cylinder 1 along the inner wall of the cylinder 1 toward the discharge port 6 of the cylinder 1 becomes long, that is, the piston wall 2 is A shape that is as close to the discharge port 6 as possible is adopted.
Thereby, the inorganic type filling material with which the core hole mixed with the liquid inside the cylinder is filled can be extruded and used without waste.

The cylinder 1 has a discharge port 6 at one end, but the inside of the discharge port 6 is sealed until the liquid A is introduced into the cartridge.
As a means for sealing the discharge port 6, as shown in FIG. 1, the discharge port 6 is provided with a sealing sheet such as an aluminum sheet 4, a discharge port 6 is provided with a cap, or aluminum. Either means may be used by providing the sheet 4 and sealing with a cap.
By sealing the discharge port 6 in this way, the inside and the outside air are blocked, and the inorganic filler filling mixture 3 accommodated in the cylinder 1 is prevented from coming into contact with moisture contained in the air. In addition, the lifetime of the cartridge for inorganic filler material applied to the method for applying the inorganic filler material of the present invention can be extended.

A piston wall 2 that moves toward the discharge port 6 is provided on the opposite side of the discharge port 6 of the cylinder 1, and the shape of the piston wall 2 is that of the outer periphery of the piston wall 2 and the inner wall of the cylinder 1. The shape is such that the inner circumference is equal, and the piston wall 2 is in close contact with the inner surface of the cylinder 1.
As a result, the piston wall 2 can move smoothly along the inner wall of the cylinder 1 and the space between the piston wall 2 and the inner wall of the cylinder 1 is sealed.
For example, most of the piston wall 2 used in the cartridge of the silicone sealant has a truncated cone shape, and if the outer periphery of a part of the piston wall 2 is smaller than the inner periphery of the inner wall of the cylinder 1, When a gap is formed between the inner wall of the cylinder 1 and the piston wall 2 moves in the direction of the discharge port 6 of the cylinder 1, the fine aggregate contained in the inorganic filler enters the gap, and the piston The movement of the wall 2 is hindered, which is not preferable.

  As the shape of the discharge port 1 of the cylinder 1, any shape can be adopted as long as the liquid A can be introduced into the cylinder 1.

The cylinder 1 contains hydraulic composition powder and thickener powder, or hydraulic composition powder, thickener powder, and fine aggregate.
As the powder of the hydraulic composition, only hydraulic powder, hydraulic powder and non-hydraulic powder can be used.
Hydraulic powder means powder that hardens in contact with water, preferably Portland cement, calcium silicate, calcium aluminate, calcium fluoroaluminate, calcium sulfoaluminate, calcium aluminoferrite, calcium phosphate, semi At least one powder selected from the group consisting of powder of water or anhydrous gypsum and self-hardening quick lime is included.
The hydraulic powder preferably has an average particle size of about 10 to 50 μm from the viewpoint of pot life at the time of molding, and has a Blaine specific surface area of 2500 cm ² / g or more from the viewpoint of ensuring high strength. Preferably there is.

The non-hydraulic powder means a powder that does not harden when contacted with water alone, but its components are eluted in an alkaline or acidic state or in a high-pressure steam atmosphere. It is intended to include powders that react with components to form products.
The non-hydraulic powder is at least one selected from the group consisting of calcium hydroxide powder, dihydrate gypsum powder, calcium carbonate powder, slag powder, fly ash powder, silica stone powder, silica sand powder, clay powder and silica fume powder. The powder is preferred.

As the thickener powder, for example, those having water retention can be preferably used, and examples thereof include methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose and the like.
If a thickener is not added to the cement-based material, the extrudability is good when the amount of water is large, but the mortar droops when filled into the core hole. This is because the fluidity deteriorates rapidly and the water cannot be pushed out.

The blending amount of the thickener is 0.08 to 0.5% by mass, preferably 0.1 to 0.2% by weight in the inorganic filler.
By blending the thickener within the above range, the fluidity of the inorganic filler can be improved and extruded with a long nozzle. If the addition amount of the thickening material is less than the above range, extrusion is possible, but if it is injected into the core hole in the lateral direction, the oblique direction, or the upward direction, sagging occurs. When the amount of the thickener exceeds the above range, the viscosity increases and sagging decreases, but a large force is required when extruding, and in some cases it cannot be extruded.
Further, even if the hydraulic composition powder and the thickener powder are mixed and introduced into the cylinder 1 in advance, the hydraulic composition powder and the thickener powder are separated into the cylinder 1 separately. Either method may be used.

Moreover, as a fine aggregate accommodated in this cylinder 1 as needed, what is normally used can be used without limitation, River sand, mountain sand, land sand, crushed sand, sea sand Examples thereof include fine aggregates such as silica sand Nos. 1 to 7 or fine powders such as silica stone powder and limestone powder. The particle diameter of the fine aggregate used is preferably 2.0 mm or less from the viewpoint of smooth movement of the piston and prevention of material blockage in the nozzle.
Here, the particle diameter is a value measured according to JIS A 1102 “Aggregate Screening Test Method”.
Furthermore, a known water-reducing material and a reaction accelerator powder can be added to the hydraulic composition powder, and the kneading properties of the mortar can be brought into a favorable state for construction.

  The main component of the liquid A introduced into the cylinder 1 and reacting with the inorganic filler filling mixture 3 is water, but if necessary, a polymer, a setting retarder, or the like is mixed in advance. It is also possible.

In the cylinder 1, the inorganic filler mixture 3 is accommodated, but is not filled in the entire cylinder 1, but is filled with a certain cavity 5.
When the container of the cartridge is erected, it is preferable that the inorganic filler mixture 3 is filled in a biased manner toward the piston wall 2 side, and the cavity 5 appears on the discharge port 6 side.
That is, the cavity 5 is preferably provided between the inner surface of the cylinder 1 on the discharge port 6 side and the end surface of the filled inorganic material mixture 3.

The volume of the cavity 5 is the same as or slightly larger than the volume to which the liquid A that reacts with the volume of the filled inorganic filler material mixture 3 should be introduced from the discharge port 6.
The volume of the liquid A such as water that reacts with the inorganic filler mixture 3 varies depending on the components of the inorganic filler mixture 3 and the desired viscosity of the resulting inorganic filler, and is set in advance. It is something that can be done.
Thereby, while the capacity | capacitance of the mixture for inorganic type filling materials obtained in the cylinder 1 is increased as much as possible, the introduced liquid A and the mixture for inorganic type filling materials 3 can be smoothly stirred and mixed by vibration.

  In the present invention, the mass ratio of water / mixed powder is 13 to 50%, preferably 16 to 40%, which can be easily extruded with a long nozzle and filled with an inorganic filler from the inside of the hole. It can be done, and even after construction, it will not sag even upwards or sideways.

FIG. 2 is a schematic view showing an embodiment of the usage form of the cartridge for inorganic filling material of FIG. 1, in which the aluminum sheet 4 sealing the discharge port 6 of the cartridge is broken, It is a figure which shows typically the state with which the liquid A which reacts with the mixture 3 for inorganic type filler materials from the discharge outlet 6 was filled.
For example, the nozzle of the inorganic filling material cartridge shown in FIG. 1 of the present invention is removed, the inner aluminum sheet 4 that has sealed the discharge port 6 is broken, and the liquid A such as water is The gas is introduced into the cavity 5 provided in the cylinder 1 from the discharge port 6 of the cylinder 1.
After the liquid A having a preset volume is introduced into the cavity 5, the discharge port 6 is temporarily sealed by a simple sealing means 7 such as a cap.

Next, the cartridge is vibrated, and the mixture 3 for the inorganic filler material and the liquid A are stirred and mixed.
The vibration may be a method of shaking the cartridge up and down, left and right, etc. by human power, or a method of applying vibration using a machine. Physically, the liquid introduced with the mixture 3 for the inorganic filler in the cylinder 1 is used. Any method can be adopted as long as A is homogeneously mixed.
Therefore, it is possible to simply mix the mixture 3 for the inorganic filler material and the liquid A without stirring and mixing them without obtaining a special apparatus or the like to obtain the injection-type inorganic filler material 10. .

  The inorganic filling material 10 obtained by uniformly mixing the mixture 3 for inorganic filling material and the liquid A in the cylinder 1 by vibration is moved through the piston wall 2 of the cartridge to the discharge port 2. Thus, it is extruded and applied to a desired direction in the concrete structure 30, for example, a laterally oriented core hole portion 31.

The core hole into which the inorganic filler material is injected can be applied to either a dried or wet core hole.
Normally, when filled into a dry concrete hole, moisture is absorbed into the dry hole wall, resulting in a dry-out state, and there is a possibility that sufficient curing reaction is not performed in that part, resulting in insufficient strength. By blending a thickener, the inorganic filling material used in the process can confine moisture inside the injected material and prevent dryout.
Conventionally, when injected into a wet hole, the water-cement ratio increases due to the water in the hole, resulting in a decrease in strength. Due to the moisture in the holes, the fluidity increases, and there is a possibility of flowing out from the holes facing sideways and upward. The inorganic filler used in the present invention can prevent moisture from entering the cement material and obtain an appropriate strength by blending an appropriate amount of a thickener.
Therefore, even if an inorganic filling material is filled in any inorganic core such as sideways, upwards, downwards, and diagonals, no sagging occurs and the core holes can be filled effectively.

As an example, when the inorganic filler 10 obtained from the discharge port 6 is extruded sideways, as shown in FIG. 3, the cartridge is mounted on a discharge machine generally called a sealing gun or a caulking gun. Can be done.
The sealing gun or caulking gun can be used as a cartridge gun for mounting a cartridge.
The cartridge is used for construction, with the sealing means 7 such as a cap removed, the tip of the nozzle 11 cut and attached to the discharge port 6 and attached to the cartridge gun. FIG. 3 schematically shows such a state.

When the cartridge is mounted on the cartridge gun, the movement of the cartridge mounted with the nozzle 11 is restricted by the tip support member 21 so that it does not move in the direction of movement of the piston wall 2, and the body support member 22. So that the cartridge is held. The tip support member 21, the body support member 22, or a body 23 described later can be integrally formed as necessary.
The body support member 22 is connected to the body 23 on the side opposite to the side connected to the tip support member 21. Further, a grip portion 24 is fixed to the body 23 so that a lever 25 that can move around a fulcrum 29 of the body can be easily operated with one hand. An interlocking portion 26 that is interlocked with the movement of the lever 25 is provided, and the pressing shaft 27 moves in the cartridge direction by the movement of the interlocking portion 26. The pressing shaft 27 can be moved only in the cartridge direction by the operation of the interlocking portion 26. The piston wall 2 is in contact with the pressing portion 28 of the pressing shaft 27 of the gun 20 on the outside air side, that is, on the surface side opposite to the surface of the piston wall 2 in contact with the hydraulic composition 10.

As shown in FIG. 3A, the nozzle 11 of the gun is inserted into the core hole 21 of the concrete structure 30, preferably at the back of the core hole 21, and the inorganic filler 10 is inserted into the drilled core hole. Is discharged (FIG. 3B). Specifically, the gripping part 24 and the lever 25 of the cartridge gun equipped with the cartridge are gripped by hand, and the lever 25 is pulled toward the gripping part 24 around the fulcrum 29, so that the lever 25 is moved to the lever 25 at the fulcrum 29. The interlocking portion 26 configured to be interlocked moves in the nozzle direction, and thereby the pressing shaft 27 connected to the interlocking portion 26 also moves. Then, the pressing portion 28 integrated with the pressing portion 27 is moved in the nozzle direction, the piston wall 2 is similarly moved in the nozzle 11 direction, and the inorganic filling material 10 in the cartridge is moved to the nozzle 11. Thus, the liquid is discharged into the sideways core hole (FIG. 3B).
The lever 25 and the interlocking portion 26 are configured to automatically return to their original positions. However, when the interlocking portion 26 returns, the pressing shaft 27 is configured not to move, and the lever 25 is moved to the gripping portion 24 side. Each time it is pulled, the pressing shaft 27 moves only in the cartridge direction, and the inorganic filling material 10 is discharged from the back of the core hole sideways.

  As a result, even if the core hole of the concrete structure 30 is filled with the inorganic filler, the inorganic filler is prevented from flowing through the core hole and sagging. Therefore, the filling material streak inserted into the core hole does not fall even before the filling material material is cured.

  As described above, the construction method of the present invention allows the inorganic filler material to be easily constructed with almost no generation of dust, and can be easily constructed, and can be used in any direction using the inorganic filler material cartridge. It is possible to easily carry out construction without variations including hole filling construction and core hole filling construction, and it can be easily fixed without causing sagging and insertion of reinforcing bars etc. Become.

(Examples 1-6, Comparative Examples 1-5)
The injection type inorganic filler of the present invention was prepared using the following materials.
Raw materials and cement used : Mild Jet Cement, manufactured by Sumitomo Osaka Cement Co., Ltd. ・ Fine Aggregate: Sand Nippon Steel Industry No. 4 Sand ・ Methylcellulose: Product Name: Metroles SNB60T, manufactured by Shin-Etsu Chemical Co., Ltd. ・ Water: Tap water

Cement, methylcellulose, and fine aggregate were introduced in advance into the cartridge shown in FIG. 1, and the mixture 3 for filling material was filled so that the cavity 5 was formed inside the cartridge. The cavity 5 has approximately the same volume as the volume of water added to obtain mortar which is a desired inorganic filler.
In addition, the mixture for filling materials is a mixture of the above cement and fine aggregate in a mass ratio of 1: 1 and methylcellulose powder blended so as to have a mixing amount shown in Table 1 below with respect to the obtained mortar mass. It is.
The mixture 3 for inorganic filling material and the cavity 5 (substantially the same capacity as the water to be blended) to be filled were designed so that the obtained inorganic filling material (mortar) had a viscosity of about 63 Pa · s.
Water A is added to the cavity 5 of the cartridge so as to have the blending amount shown in Table 1 with respect to the water / mixed powder (cement + methylcellulose), the discharge port 6 is sealed, and the cartridge is moved up and down. The mixture was well stirred to prepare an inorganic filler (mortar).

The cartridge in which the mortar was prepared was attached to the inorganic filling material cartridge gun shown in FIG.
As shown in FIG. 3, the concrete structure 30 was provided with sideways drilling core holes 31 (Φ30 × 130 mm) using a concrete drill. It was confirmed that the drill core hole was dry.
Using each cartridge gun provided with a cartridge containing the prepared inorganic filler of Examples 1 to 6 and Comparative Examples 1 to 5 in the core hole, a nozzle is installed in the inner part of the core hole. Then (FIG. 3A), each injection filling material was injected from the nozzle, and each filling material was filled from the back of the core hole 31 (FIG. 3B). Specifically, as described above, the nozzle 11 of the gun is turned sideways, and the piston wall 2 is moved by pulling the lever 25, so that the nozzle 11 moves sideways from the back of the core hole 31 to the core hole 31. Filled. Table 1, FIG. 4 and FIG. 5 show the sagging state of each filling material 1 at the time of filling each filling material.

  In the above table, the case where filling is possible and no sagging is evaluated as ◯, the case where the sagging cannot be packed, or the case where the viscosity is too high to be extruded from the nozzle is evaluated as x, and the middle The thing of the state was represented as evaluation (triangle | delta).

From Table 1, according to the construction method of the inorganic filling material of the present invention, the inorganic filling material filled in the core hole of the concrete structure does not cause sagging and can ensure good filling properties. Recognize. On the other hand, it is apparent that the comparative example is difficult to fill due to sagging.
Moreover, even when the inside of the core hole provided in the concrete structure was wet, the same evaluation as above could be performed.

  As described above, according to the method for filling an inorganic filler material of the present invention, an inorganic filler material containing a specific amount of methylcellulose can be effectively applied without sagging in the core hole. In a concrete structure in the field, it can be effectively applied to construct in any direction, whether it is wet or dry.

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Piston wall 3 Mixture for inorganic filler materials 4 Aluminum sheet 5 Cavity 6 Discharge port 7 Sealing means A Liquid 10 Inorganic filler material 11 Nozzle 20 Cartridge gun 21 Tip support member 22 Body support member 23 Body 24 Grasping part 25 Lever 26 Interlocking part 27 Pressing shaft 28 Pressing part 29 Support point 30 Concrete structure 31 Core hole

Claims (7)

A cylinder having a nozzle at one end, a piston wall movable toward the discharge port at the tip of the nozzle in the cylinder, a hydraulic composition and a thickening agent as a mixture for an inorganic filler in the cylinder Liquid is introduced into the cartridge containing the mixed powder of the agent from the discharge port, the cartridge is vibrated, and the mixture for the inorganic filler material and the liquid are stirred and mixed, thereby the cartridge. An inorganic filler material is prepared, the prepared inorganic filler material contains 0.02 to 2.0% by mass of a thickener, the water / mixed powder mass ratio is 13 to 50%, and A method of filling a core hole filling material for a concrete structure, characterized in that the piston wall is moved to the discharge port side and the inorganic filling material is filled into the wet or dry core hole from the discharge port. . The method for filling core hole filling material for concrete cultivated material according to claim 1, wherein fine aggregate is further contained in the mixture for inorganic filling material in the cylinder. Filling method of core hole filling material of structure. 3. The method of filling a core hole filling material for a concrete structure according to claim 1 or 2, wherein the cylinder filling of the cartridge is filled with the inorganic filling material mixture biased toward the piston wall, and the discharge port. A core hole filling material for a concrete structure, characterized by using a cartridge in which a cavity is formed between the inner surface of the cylinder on the side and the end face of the filled mixed inorganic filler material Filling construction method. The method for filling a core structure filling material for a concrete structure according to any one of claims 1 to 3, wherein the volume of the cavity of the cartridge is the filling mixture for the inorganic filling material. The method for filling the core hole filling material of a concrete structure, characterized in that it is larger than the capacity to be introduced through the process. The method for filling a core structure filling material for a concrete structure according to any one of claims 1 to 4, wherein the piston wall of the cartridge has a shape that is in close contact with the inner surface of the cylinder. Filling method of filling material core hole. The method for filling a core structure filling material for a concrete structure according to any one of claims 1 to 5, wherein a liquid is introduced from the discharge port of the cartridge, and vibration is applied to the cartridge, thereby the inorganic filling material. The mixture for stirring is mixed, the piston wall is moved to the discharge port side, the discharge port at the tip of the nozzle is inserted into the inner part of the core hole, and the inorganic filling material is extruded from the discharge port. A method for filling a core hole filling material of a concrete structure. The method for filling a core structure filling material for a concrete structure according to any one of claims 1 to 6, wherein the cartridge is inserted when the inorganic filling material is extruded from the discharge port inserted in the inner part of the core hole. A method for filling a core hole filling material of a concrete structure, characterized in that the method is carried out with a sealing gun attached.

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