JPH086465B2 - Mortar wall crack repair method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for repairing cracks generated in a mortar wall in a building, and relates to a simple method for repairing without leaving a trace of repair.

[Conventional technology]

Mortar wall, which is often used as the outer wall of the building,
Originally, the outer wall is extremely durable, but depending on the conditions under which it is used, cracks may occur due to external factors such as severe weather conditions and abnormal vibrations. If this is left unattended, cracks will further expand, and water will leak and internal corrosion will cause aging of the building, so some repair is necessary.

Conventionally, in the repair of such a mortar wall, as a simple method, a sealing material has been injected and adhered along the crack from the surface of the mortar wall to seal the crack. Further, in order to make the traces of repair by the sealing material inconspicuous in appearance, a coloring agent may be applied to the surface of the injected and bonded sealing material.

In addition, in the case of many cracks or in order to leave no trace of repair on the appearance, the entire wall surface with cracks was repaired by dubbing from underground.

[Problems to be solved by the invention] In the conventional repairing method, injecting and adhering the sealing material along the cracks, in the case of repairs that are normally performed, it is a very simple construction, As shown in FIG. 4, it was difficult to sufficiently fill the inside of the generated crack with the sealing material, and it was difficult to obtain a satisfactory repair effect. That is, since the sealing material is adhered only around the opening of the crack, the crack cannot be expanded due to external vibration or distortion of the wall, resulting in a gap in the repaired portion. Furthermore, since the repair material is adhered to the sealing material, it will be raised in the shape of a stucco pattern, etc. However, there was a problem that the trace of the repair could be clearly discriminated and the appearance was not preferable.

Further, in the case of repair by dubbing from the mortar base to the entire wall surface where cracks have occurred, the repair effect and the finish on the appearance are also preferable, but there is a problem that it becomes an extremely expensive construction. .

The present invention has been made in view of the above problems, similar to a normal repair using a sealing material, can be carried out at low cost by simple construction, moreover, the effect of sealing and preventing recurrence of cracks is high. Furthermore, it is an object of the present invention to provide a method for repairing cracks in a mortar wall that leaves almost no trace of repair in appearance, similar to dubbing repair for the entire wall surface.

[Means for solving the problem]

In order to achieve the above object, in the method of repairing the cracks generated in the mortar wall of the present invention, an elastic sealing material is injected in accordance with the cracks, and further, the inside of the cracks and the peripheral edge of the opening are slid. After that, before drying the elastic sealing material, stucco powder is adhered to cover the sealing material, and then a coloring agent is applied to repair cracks in the mortar wall.

[Work]

In the repair method configured as described above, the elastic sealing material injected following the crack is further slidably attached to the inside of the crack and the peripheral edge of the opening, so that the sealing material is strong and surely. To be glued. Then, the sealing fills the opening of the crack almost smoothly without sealing the stack pattern and seals it. Further, since the stucco powder is adhered after the sealing material is slid on and before the sealing material is dried, the stack powder is easily repaired by the adhesive force of the sealing material.
Next, when a coloring agent is applied from the surface of the adhered stucco powder, the coloring agent adheres to the stucco powder, so that the repaired portion is hidden and a state similar to the surrounding wall surface is exhibited.

〔Example〕

 Next, examples of the present invention will be described.

1 to 3 are cross-sectional views showing a repaired state by this repairing method, in which a sealing material 1, a stucco powder 2, and a coloring agent 3 are applied to a crack A generated in a mortar wall.
Is used. In the present invention, the crack A has an opening width of about 0.3 mm or more, but if the opening width is smaller than that, it can be dealt with by the method described later.

Generally, the mortar wall has a mortar brush finish lysine finish, a mortar base syrup removal finish, various mortar brush finish plaster finishes, a mortar brush finish resin spray tile finish, etc., but this repair method is It can be applied to any of the cases, and in the figure, an example of repairing cracks generated on the wall surface of stucco finish is shown.

First, the elastic sealing material 1 is injected into the generated crack A in accordance with the crack. As the sealing material, elastic materials such as polysulfide, two-component polyurethane, butyl rubber and acrylic are used. On the other hand, inelastic sealing materials are not suitable because they cannot follow the expansion of cracks due to wall strain due to external vibration after repairing cracks. The injection of the sealing material is carried out by using a commonly used sealing gun. Then, the injected sealing material 1 is initially in a state of being raised in the opening of the crack A,
Next, this is slidably attached to the inside of the crack by using a brush or the like, and further slidably attached to the peripheral portion of the opening. At this time, it is preferable that the surrounding stucco pattern is not buried and is scattered with a brush so that it is slidably attached to the peripheral edge portion of the opening. In this way, the cracks are sealed by the sealing material, and the surface of the opening is smoothed to the surface without exposing the stucco pattern.

Then, the stucco powder 2 is attached to the exposed surface portion of the sealing material 1 slid on the cracks before the sealing material is dried. In order to attach the stucco powder 2, it is made uniform using a brush or the like, and is attached almost evenly. The stucco powder used at this time may be of the same quality as the material used for the stucco pattern, for example, synthetic resin-based, silica sand-based, cement-based, etc., but usually cement-based stucco powder may be used.

At this stage, since the sealing material is in a completely covered state, the coloring agent 3 is then applied from the surface of the attached stucco powder 2 to finish. Colorant 3 is
It may be similar to the top coat 13 used on the wall surface to be repaired, but it is used after being toned depending on the color change of the wall surface. The colorant is applied by using a sprayer, a sprayer, or simply by brush coating.

In the repair method described above, the sealing material injected into the crack is firmly slid on the inside of the crack and the peripheral edge of the opening with a brush or the like, and the elastic sealing material is used as the sealing material. Therefore, it follows the distortion after repair. Since the stucco powder is attached to the opening of the crack before the sealing material is dried, the stucco powder can be easily attached to the sealing material without using a binder such as another adhesive.
In addition, stucco powder attached to the surface of the sealing material,
It is similar to the stucco pattern material used on the wall surface, and the colorant is easily fixed and the appearance after finishing is extremely good.

The opening width of the cracks on the mortar wall is about 0.3m.
In repairing so-called hair cracks smaller than m,
Rub the undiluted solution of the top coat used for wall surface finishing with a brush, or if discoloration has occurred due to aging, slide the cement stucco powder with a brush after moistening the hair crack surface. It can be easily repaired by inserting it.

〔The invention's effect〕

Since the repair method of the present invention is configured as described above, it has the following effects.

Unlike the dubbing repair of the entire wall surface, only the cracked part that has occurred is repaired, which is a simpler construction than the conventional repairing of only the sealing material, and can be implemented at low cost. Moreover, since the elastic sealing material is surely slid on the cracks, the effect of sealing and preventing the recurrence of the cracks is high. Also,
Since stucco powder is attached before drying the sealing material,
The sealing material can be easily coated. Since the surface of the sealing material and the stucco powder attached to it are colored and finished on the stucco powder, it is very preferable in appearance, leaving almost no trace of repair as in the case of dubbing repair.

[Brief description of drawings]

1 and 2 are cross-sectional views showing a repaired state by the crack repairing method of the present invention, and FIG. 3 is a cross-sectional view of an essential part showing a repaired part formed by an elastic sealing material, stucco powder and a coloring agent, FIG. 4 is a sectional view showing a conventional repaired state. 1 ... Elastic sealing material, 2 ... Stucco powder, 3 ... Coloring agent, 11 ... Mortar base, 12 ... Stucco pattern, 13 ... Top coat, A ... Crack.

Claims (1)

[Claims] Claim: What is claimed is: 1. An elastic sealing material is injected in accordance with a crack, and after the elastic sealing material is slidably adhered to the inside of the crack and the peripheral edge of the opening, stucco powder is adhered to the elastic sealing material before drying. A method for repairing cracks in a mortar wall, which comprises coating a material and then applying a coloring agent.