JPH03100276A - Repair of crack on mortar wall - Google Patents

Abstract

PURPOSE:To simplify execution by attaching an elastic group sealing material into the inside of a crack and an opened port peripheral edge part and carrying out the covering with stucco material before the drying of the sealing material and applying a coloring agent. CONSTITUTION:An elastic sealing material 1 in polysulfite group, etc., is poured into a crack A, and attached with an opened port peripheral edge part. Then, before the drying of the sealing material, 1 stucco powder 2 is smoothly attached by using a brush, etc., and coloring agent 3 is applied onto the surface of the powder 2, and finishing is performed. The sealing material 1 is attached firmly and surely onto the inside of the crack A and the opened port peripheral edge part, and the stucco powder 2 is easily attached onto the sealing material 1, and the coloring agent 3 is fixedly attached onto the stucco powder 2. Therefore, execution is simplified at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for repairing cracks generated in mortar walls in buildings, and relates to a method for easily repairing cracks without leaving any traces of the repair.

[Conventional technology]

Mortar walls, which are often used as exterior walls of buildings, are extremely durable, but depending on the conditions in which they are used, they can crack due to external factors such as harsh weather conditions or abnormal vibrations. Sometimes. If this is left untreated, the cracks will expand further and the building will deteriorate due to closed water and internal corrosion, so some type of repair will need to be carried out.

Conventionally, in repairing such mortar walls, a simple method has been to inject and adhere a sealing material from the surface of the mortar wall along the cracks to repair the cracks. Furthermore, in order to make the traces of the sealant repair less noticeable, colorants were sometimes applied to the surface of the injected/adhered sealant.

Furthermore, in cases where a large number of cracks have occurred, or in order to leave no trace of the repair on the exterior, the entire wall surface where the cracks have occurred is repaired by dubbing the mortar base.

[Problem to be solved by the invention]

In the conventional repair method, sealing material is injected and bonded along the crack, which is an extremely simple repair method, but as shown in Figure 4, the crack that has occurred It has been difficult to fill the inside of the sealant with a sufficient amount of sealant, making it difficult to obtain a satisfactory repair effect.

That is, since the sealing material adheres only to the periphery of the opening of the crack, it cannot follow the expansion of the crack caused by external vibration or wall distortion, resulting in a problem that a gap is created at the repaired location. Furthermore, the sealant to which the repaired area is adhered causes the shape of the stucco pattern to be raised, and even if the colorant is applied from the surface of the sealant, the colorant does not adhere well to the sealant. Therefore, there was a problem in that the traces of the repair were clearly discernible, and the appearance was also unfavorable.

In addition, in the case of repairing the entire wall surface where cracks have occurred by dubbing it from the mortar base, although the repair effect and the appearance finish are favorable, there is a problem that the construction is extremely expensive. .

The present invention has been made in view of the above-mentioned problems, and can be easily applied to paper warehouses in the same way as normal repairs using sealants, and is effective in sealing cracks and preventing their recurrence. To provide a method for repairing cracks in a mortar wall that hardly leaves any traces of repair in appearance, similar to dubbing repair of the entire wall surface.

[Means to solve the problem]

In order to achieve the above object, in the method of repairing cracks generated in a mortar wall according to the present invention, an elastic sealant is injected along the crack, and is then slid onto the inside of the crack and the periphery of the opening. After that, cracks in the mortar wall are repaired by applying stucco powder to cover the elastic sealant before drying, and then applying a colorant.

[For production]

In the repair method configured as described above, the elastic sealant injected along the crack is further slid against the inside of the crack and the periphery of the opening, so the sealant is firmly attached and reliably fixed. Glued. and,
The sealing material fills and seals the crack openings in a substantially smooth manner without being raised in the stucco pattern. Moreover, since the stucco powder is attached after the sealant is slid on and before the sealant is dried, the stucco powder can be easily repaired due to the adhesive force of the sealant. Next, when a colorant is applied to the surface of the stucco powder, the colorant adheres to the stucco powder and hides the repaired area, making it look like the surrounding wall surface.

〔Example〕

Next, examples of the present invention will be described.

Figures 1 to 3 are cross-sectional views showing the state of repair using this repair method. , stucco powder 2, and colorant 3 are used. In the present invention, cracks A with an opening width of about 0.3+am or more are targeted, but cracks with an opening width smaller than that can be dealt with by the method described below.

In general, mortar walls can be finished with ricin for mortar brushes, lacquered finish for mortar base, plastering finish for various mortar brushes, and resin-sprayed tile finish for mortar brushes, depending on the finish on the mortar base. It can be applied to any case, and the figure shows an example of repairing a crack that occurred on a stucco-finished wall surface.

First, an elastic sealing material 1 is injected into the generated crack A along the crack.

This sealing material is made of an elastic material such as polysulfide, two-component polyurethane, butyl rubber, or acrylic. On the other hand, inelastic sealing materials are not suitable because they cannot follow the expansion of cracks caused by wall distortion due to external vibrations after crack repair. Injection of the sealant is performed using a commonly used sealing gun. The injected sealant L is initially piled up at the opening of the crack A, so next, use a brush or the like to push it sufficiently into the crack, and then apply it to the periphery of the opening. Also attach it to the section. At this time, it is preferable to scatter the stucco pattern with a brush so as not to bury the surrounding stucco pattern and to apply it as thinly as possible to the periphery of the opening.

In this way, the cracks are sealed with the sealant and the surface of the opening is made substantially smooth with respect to the surface without protruding the stucco pattern.

Then, stucco powder 2 is attached to the exposed surface portion of the sealant 1 that has been slid onto the crack before the sealant dries. To apply the stucco powder 2, use a brush or the like to apply it uniformly and evenly. The stucco powder used at this time may be of the same quality as the material used for the stucco pattern, such as synthetic resin-based, siliceous-based, cement-based, etc., and usually cement-based stucco powder may be used.

At this stage, the sealing material is completely covered and in a state of being in a state of being, so next, the coloring material 3 is applied from the surface of the stucco powder 2 which has been adhered to the surface of the stucco powder 2 for finishing. Coloring agent 3 is
It may be similar to the top coat 13 used on the wall surface to be repaired, but it is used after adjusting the color depending on the degree of discoloration of the wall surface. The colorant is applied using a sprayer, a mist sprayer, etc., or simply by brushing.

In the above-mentioned repair method, the sealant injected into the crack is firmly attached to the inside of the crack and the periphery of the opening by a brush, etc., and an elastic sealant is used as the sealant. Therefore, it will follow the distortion etc. after repair. Since the stucco powder is attached to the opening of the crack before the sealant is dried, the stucco powder is easily attached to the sealant without using any other bonding agent such as an adhesive.

In addition, stucco powder that adheres to the surface of the sealant,
It is similar to the stucco pattern material used on walls, and the coloring agent is easily fixed to it, giving it an extremely good appearance after finishing.

In addition, the opening width of the crack that occurred in the mortar wall was approximately 0.3
To repair so-called hair cracks that are smaller than 1/2 inch, you can use a brush to apply the undiluted solution of the top coat used to finish the wall, or if the color has discolored due to aging, use cement stucco powder. It can be easily repaired by moisturizing the hair crack surface and rubbing it in with a brush.

〔Effect of the invention〕

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, this repair only repairs the cracked part where the crack has occurred, and it is a simpler construction than the conventional repair using only sealant, and can be carried out on the paper storage. Moreover, since the elastic sealant is reliably attached to the crack, it is highly effective in sealing the crack and preventing its recurrence. Furthermore, since the stucco powder is applied before the sealant dries, the sealant can be easily coated. Since the surface of the sealant and the stucco powder attached thereto are leveled and colored on top of the stack powder, it leaves almost no traces of the repair and is extremely desirable in terms of appearance, similar to dubbing repair.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views showing the state of repair by the crack repair method of the present invention, FIG. FIG. 4 is a sectional view showing a conventional repair state. ! ...Elastic sealing material, 2 ... Stucco powder, 3 ... Coloring agent, 11 ... Mortar base, 12 ... Stucco pattern , 13...Top coat, A...Crack.

Claims (1)

[Claims] Injecting an elastic sealant along the crack and sliding it on the inside of the crack and the periphery of the opening, and then applying stucco powder to cover the sealant before drying the elastic sealant, A method for repairing cracks in a mortar wall, the method comprising subsequently applying a coloring agent.