JPH1171908A - Repair method for wall of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide not only a waterproof function but also a ventilation function, by sticking a vapor-permeable waterproof sheet on a wall face with polymer cement paste and fix the end of the sheet to the wall face and applying polymer cement paste or mortar on the vapor-permeable waterproof sheet and further, laying an exterior member. SOLUTION: A vapor-permeable waterproof sheet is stuck on a wall face with polymer cement paste and the end of the sheet is fixed to the wall face and polymer cement paste or mortar is applied on the sheet and further, an exterior member is attached on the polymer cement or mortar layer face. The vapor-permeable waterproof sheet is made from ester fiber coated with polyurethane having fine holes and polyethylene-netted tape is stuck with polymer cement paste to fix the end of the vapor-permeable waterproof sheet to the wall face. Cement, synthetic polymer emulsion, water, defoaming agent, sand, etc., are used as the polymer cement paste or the mortar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a wall of a building in which rainwater leaks from an outer wall surface or a part of the outer wall surface is damaged due to damage to the outer wall surface.

[0002]

2. Description of the Related Art In general, a reinforced concrete building has a short roof and a flat roof having no eaves other than a balcony. Until the mid-1950s, the walls were thick and solid concrete was cast, so there was almost no leakage from the walls. However, the construction of buildings has increased significantly since the late 1950s, and the wall thickness has been gradually reduced due to factors such as the pursuit of economic efficiency and the increase in concrete strength. In addition, due to the development of the concrete pumping method, it is no longer possible to cast concrete concrete,
In addition, salt damage caused by using sea sand as concrete aggregate, carbonation of concrete, external water absorption of alkali silicate by chemical reaction with aggregate silica mineral by alkali aggregate reaction, gelation, volume expansion, etc. Due to the various factors described above, cracks and spalling of the concrete frame or wall surface occur frequently, and water leaks into the room.

[0003] Conventionally, the wall surface which has caused such water leakage has been repaired by the following method. (1) Temporary water stoppage treatment by injecting caulking material, resin, etc. into cracks. (2) After the treatment of (1), the outer surface is decoratively finished with an exterior material. (3) The mortar part that has been peeled off and lifted off is scraped off to the base frame part, mortar is applied again, the rough surface base is smoothed, and decorative finishing is performed with an exterior material.

[0004]

However, in the method (1), although the number of days required for construction is short and inexpensive, since only part of the wall surface is treated, new damage occurs from other places. Also, there are drawbacks such as the appearance of the repaired part being raised on the back surface and the finished appearance being impaired. In the method (2), a beautiful appearance can be obtained by a decorative finish,
New damage is likely to occur in areas other than the processing location.

[0005] Furthermore, the method (3) requires a long undercoating step, and causes problems such as a problem of residue treatment due to shaving, noise at the time of shaving, and an influence on the neighborhood due to generation of dust. In addition, there is a disadvantage that the base material made of mortar cracks due to the movement of the skeleton and the shrinkage of the mortar itself, thereby impairing the waterproof effect. In the conventional repair of building walls, waterproofing has been given top priority, and ventilation has not been considered at all. Building walls are required to have a ventilation function in addition to a waterproof function. It is important to make the interior of the building breathe.

[0006]

According to the present invention, a moisture-permeable waterproof sheet is attached to a wall surface, an end of the moisture-permeable waterproof sheet is fixed to the wall surface, and a polymer cement paste or mortar is applied to the moisture-permeable waterproof sheet. Further, the present invention relates to a method for repairing a wall of a building, wherein an exterior material is laminated on a surface of a polymer cement paste or a mortar layer.

[0007] According to the present invention, it is possible to perform repair with excellent waterproofness and ventilation performance in a relatively short period of time by a simple construction method. In addition, even if the wall moves and cracks occur after construction, the moisture-permeable waterproof sheet is firmly adhered to the base and absorbs most of the movement of the frame and mortar, so the propagation of cracks to the exterior material As a result, the exterior material does not peel off, and stable waterproof performance is maintained for a long period of time.

The moisture-permeable waterproof sheet of the present invention is a polyurethane-coated ester fabric having micropores. As an example of this moisture-permeable waterproof sheet, in TAMOUR (Amour) WH-6000 Toyo cross Ltd., water pressure 1500MmAg, moisture permeability 5500g / m ² · 24
hrs, thickness 0.12 mm, weight 68 g / m ² .

As a method of fixing the end of the moisture-permeable waterproof sheet to the wall surface, a method of attaching a polyethylene net type tape with a polymer cement paste, a method of fixing it to a base with a screw using a metal flat bar or a metal angle, A method of directly fixing to the base with a screw, a method of bonding and fixing the moisture-permeable waterproof sheet and the base with a sealant, and the like can be given.

Examples of the polymer cement paste or mortar include cement (ordinary Portland cement, white cement, early-strength cement, etc.), synthetic polymer emulsion (styrene-butadiene rubber, vinyl acetate, acrylic resin, etc.), water, A paste or mortar obtained by mixing an antifoaming agent, sand or the like can be used. As the exterior agent, the following various materials described in Japanese Industrial Standards can be used. (1) JIS A 6909 (thin finish coating material) Exterior cement coating material (cement lysine), exterior siliceous coating material (silica lysine), exterior synthetic resin emulsion coating material (resin lysine, acrylic lysine), flexible Type exterior synthetic resin emulsion-based coating material (elastic lysine), exterior synthetic resin solvent-based thin coating material (solution lysine) (2) JIS A 6915 (thick finishing coating material) Exterior cement-based thick coating material (cement stucco), exterior silicate Thick coating material (silica stucco), exterior synthetic resin emulsion coating material (resin stucco, acrylic stucco) (3) JIS A 6910 (multi-layer finish coating material) Cement-based multi-layer coating material (spray tile, cement tile),
Silicic multi-layer coating material (silica tile), synthetic resin emulsion multi-layer coating material (spray tile E), reaction-curable synthetic resin emulsion multi-layer coating material (spray tile RE, epoxy tile), synthetic resin solvent-based Multi-layer coating material (spray tile RS, epoxy spray tile), stretch (elastic) type multi-layer coating material (glossy elastic coating material, rubbery elastic spray material) Next, the repair method of the present invention will be described in detail.

The construction accuracy and durability of waterproofing work are greatly affected by the treatment of the substrate. Therefore, before starting the waterproofing work, the base should be thoroughly inspected and treated. The treatment of the underlayer is generally performed according to the following steps. (1) The repaired surface is fully wrung and washed with water to make the surface clean. (2) The conventional exterior finishing part of the fitting part at the corner of the repaired surface is quenched with a polishing machine over a width of 100 mm,
Put out the mortar surface. (3) Where the finished surface of the waterproof base is raised or peeled off from the skeleton concrete, smooth finish with a polymer cement paste or a polymer cement mortar. (4) If there is a large crack on the exterior wall, V-cut along the crack, finish it smoothly using polymer cement paste or polymer cement mortar, and affix an 18 mm wide curing paper tape along the crack. The air permeable tarpaulin is floated and attached, and the cracks are moved separately so that the movement does not directly add to the air permeable tarpaulin. (5) If the latence floats on the surface of the base or the water absorbency is severe, apply sufficient water to the base and apply the polymer emulsion to the wall surface in a semi-dry state. Further, a kneaded material of polymer cement paste is applied to reinforce defective wall surfaces.

After the completion of the above-mentioned base treatment, the following waterproofing work is performed. (1) Apply the polymer cement paste as an adhesive to the wall surface reinforced as described above. (2) Adhering the moisture-permeable waterproof sheet while expelling the inside air using a brush. After that, it is rolled by a hand roller and is brought into close contact with the substrate. (3) Fix the end of the moisture-permeable waterproof sheet by pressing with a modified silicone sealant, pressing with a net-type tape, or pressing with a metal plate.

After finishing the above construction, the following exterior finishing is carried out. (1) As a spraying base material, a polymer cement paste prepared in advance is uniformly brush-coated on the surface of the waterproof sheet, and a polymer cement mortar trowel is pressed or brushed. (2) Spraying Spraying the exterior material on the base surface with a spray gun or applying or spraying with a roller brush.

Hereinafter, the present invention will be described by way of examples. Example Due to countless floating and cracks on the wall surface of a four-story apartment building 15 years after its construction, a building with high penetration of rainwater was repaired as follows. (1) Substrate treatment Weathered lysine sprayed material on the wife's wall is kerened and washed with water.

The corner joint of the repaired surface is ground using a cup-type diamond grinder to expose the underlying mortar surface. Cracks (3 to 5 mm width) generated on the existing lysine surface were V-cut, and the entire surface was ironed and ironed with latex cement paste to finish it smoothly. (2) Waterproofing work A water-permeable waterproof sheet was vertically adhered to the wall surface with a polymer cement paste, and sufficiently pressed with a hand roller to adhere to the base.

[0016] The moisture-permeable waterproof sheet previously attached and about 10
The following breathable waterproof sheet is adhered by overlapping about mm width. Follow the procedure in the next step to stick the moisture-permeable waterproof sheet.

[0017]

According to the repair method of the present invention, the procedure and content of the repair are simple, and the repair is completed in about half the period of the conventional repair method. In addition, the waterproofing performance of the repaired wall is excellent, and even if the wall foundation moves after construction and cracks occur,
Due to the strong adhesion to the base and the cushioning effect, cracks do not propagate to the exterior material, and excellent waterproof performance and beautiful exterior are maintained for a long time.

Furthermore, in the present invention, since the moisture-permeable waterproof sheet is used, not only the waterproof function but also the ventilation performance can be given to the wall of the building, and the interior of the building can be breathed. You can make it.

Claims (1)

[Claims] 1. A moisture-permeable waterproof sheet is adhered to a wall surface with a polymer cement paste, an end of the moisture-permeable waterproof sheet is fixed to the wall surface, and a polymer cement paste or mortar is applied to the moisture-permeable waterproof sheet. A method for repairing a wall of a building, wherein an exterior material is laminated on a cement paste or a mortar layer surface.