JPS6130106B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exterior finishing method for walls in buildings, particularly exterior walls.

Conventionally, the exterior finishing of such walls was generally done by placing a waterproof sheet such as tar felt on the surface of a base made of plywood, etc., then placing lath netting on top of it, and then applying 20 to 25 mm of mortar by plastering. 2-3 thick
It is common to finish by applying two coats. However, applying mortar in two or three times as described above not only poses a major obstacle to saving labor and shortening the time required for on-site work, but also reduces the temperature and humidity between the mortar layer and the underlying surface. There was an unavoidable drawback that cracks would inevitably occur in the mortar due to the difference in expansion and contraction due to changes. Therefore, in recent years, methods have been considered to prevent cracks on the mortar surface by mixing alkali-resistant glass fibers into the mortar or spraying an elastic coating material on the mortar surface, but these methods have the drawback of increasing cost. However, in reality, it is not widely adopted.

On the other hand, in the framework construction method called the two-by-four construction method, which has made remarkable progress in recent years, a mixture of asphalt emulsion, synthetic resin emulsion, filler, etc. is applied to the surface of the base material instead of the conventional waterproof sheet. The method used is to apply cement stucco on top.
However, when mixing asphalt emulsion and synthetic resin emulsion individually to make a mixture, if the emulsifier, thickener, etc. are not well matched, they may separate or the advantages of both may not be fully demonstrated. . In other words, asphalt emulsions are mainly used to improve waterproofness, and synthetic resin emulsions are used mainly to increase adhesion to heavy top coats (cement stucco). If the intended function (adhesive force) of the emulsion is not fully fulfilled, the risk of the topcoat falling off due to its large weight cannot be eliminated, and in addition, the above-mentioned composition originally softens when exposed to heat. Furthermore, the top coat cannot completely prevent the cement stucco from slipping off or peeling off during times of heat such as fire. In addition, considering the expansion and contraction of the underlying surface and the distortion of the building, over many years the expansion and contraction of the underlying material will concentrate at the joints of the underlying plywood and around the openings of window frames, etc. Even if it is said to have strong adhesion, the top coat tends to crack the cement stucco, and there is no risk of it peeling off or falling off.

In view of the above-mentioned shortcomings of the prior art, this invention prevents cracks from forming on the exterior wall surface, and provides an exterior wall finish with excellent heat insulation and dew condensation properties in a simple and easy way by eliminating the conventional mortar process. The purpose of this paper is to provide an efficient wall surface finishing method.

Therefore, this invention forms a waterproof layer on the surface of a base material, spreads a lath net on top of the waterproof layer, and then uses cement, fiber material, and inorganic foamed particle aggregate as main components, or the inorganic foamed Cement above particle aggregate
The purpose of the present invention is to provide a method for finishing an exterior wall surface, which comprises applying an exterior composition containing 200 to 400 vol% of these mixed materials to a predetermined thickness by troweling or spraying.

Formation of a waterproof layer is most commonly carried out by applying a waterproof sheet such as tar felt on the surface of the base material, as in conventional construction methods, but there are other methods such as applying a rubber asphalt emulsion or asphalt. The waterproof layer may be formed by applying a mixed composition such as a synthetic resin emulsion and a filler.

Examples of the fibrous material used in the exterior material composition include rock wool, asbestos, glass fiber, tailings, natural or synthetic fiber waste, etc., and examples of the foamed particle aggregate include perlite, anti-flinder stone, karishite, and foamed material. Examples include glass. These fibrous materials and foamed particle aggregates may be used alone or in combination of two or more. Also,
The finishing composition according to the present invention may be prepared by adding dolomite plaster, inorganic admixtures such as calcium carbonate, and other additives as necessary in addition to cement, fibrous materials, and foamed particle aggregate. . The amounts of cement, fibrous material, and foamed particle aggregate should be determined based on the fire retardant, heat insulating, and fireproof properties of the wall being constructed.
It can be changed freely depending on how much anti-condensation properties etc. are required, but generally cement
For 100 vol, it is appropriate that the foamed particle aggregate should be about 200 to 400 vol, and the fiber material should be about 10 to 150 vol. Incidentally, in Example 1, which will be described later, per 10 vol of cement, perlite is about 224 vol and rock wool is about 27 vol, and in Example 2, per 100 vol of cement is about 343 vol of perlite, 11 vol of tailing, 11 vol of glass fiber, and about 61.2 vol of rock wool.

The above-mentioned exterior material composition is applied by troweling or spraying onto the surface of a base material on which a waterproof layer is formed and a lath net is stretched. The total thickness of this coating layer is about 5 to 20 mm, and it may be finished by performing undercoating and then topcoating with the same material, or alternatively, the above coating layer can be used as an undercoat layer and then You can also finish by spray painting with regular cement stucco. In addition,
If you apply paint such as acrylic resin on the surface,
Furthermore, a beautiful finished surface with excellent waterproofness can be obtained.

According to this invention, the exterior material composition includes cement,
By including fibrous substances and foamed particle aggregates as main materials, the latter two in particular have a great effect on preventing cracks in the coating layer itself. In particular, foamed particle aggregate has a weight of 200 to 400% for 100vol% of cement.
Because it is mixed in a large amount (vol%), it weakens the shrinkage force caused by the condensation of cement, and prevents the fine cracks that occur due to the shrinkage force from continuously growing, and as a result, the coating layer To achieve the effect of effectively preventing the occurrence of large visible cracks on a surface. Moreover,
The above coating layer is applied to a predetermined thickness by troweling or spraying on the base wall surface covered with lath netting, so the coating is firmly integrated with the lath netting in a mold that hugs it. On the other hand, unlike the case of troweling with heavy cement mortar, the layer is lightly adhered to the underlying waterproof layer, allowing some movement of the contact surface, which prevents distortion of the building. The effects of expansion and contraction of the base material are blocked by the waterproof layer and are less likely to directly affect the coating layer, and therefore, cracks in the coating layer are reliably prevented. Moreover, by containing cement as a main component, even if a normal cement stucco is applied thereon as a top coat, it can be made to have excellent adhesion integrity. In addition, by including the foamed particle aggregate and fiber material, the exterior material composition can be made very light, about 1/3 of the weight of ordinary cement stucco, and It eliminates the risk of the paint layer peeling or falling off, and since it is lightweight and sprayed, it is easy to work on site, and the construction period is significantly shortened. can. In addition, the coating layer of the exterior material composition according to the present invention has a very low thermal conductivity, about 1/5 of that of ordinary cement stucco, so it is effective as an energy-saving wall, and has good heat insulation and prevention of dew condensation. In addition to this, since the particulate aggregate mixed in a large amount is made of an inorganic material, an outer wall with excellent fire prevention performance can be easily and inexpensively formed.

Below, as examples of the present invention, various suitable formulation examples of the exterior material composition used in the present invention will be shown, particularly as a new product.

Example 1 Cement 100 parts by weight Inorganic mixture (calcium carbonate) 34〃 Kansui stone (3 rin) 20〃 Ethylene/vinyl acetate copolymer powder 6 Rock cotton 6〃 Perlite 30〃 Other additives 4 Example 2 Cement 100 parts by weight Tailing 8〃 Glass fiber 1 Rock cotton 18〃 Perlite 84〃 Example 3 Cement 100 parts by weight Silica sand 16〃 Glass fiber 5 parts by weight Perlite 75〃 Styrofoam 15〃 Ethylene/vinyl acetate copolymer powder 2.5〃 Asbestos 5 Rock cotton 2.5〃 Example 4 Cement 100 parts by weight Silica sand 26.5〃 Perlite 33.2〃 Ethylene/vinyl acetate copolymer powder 1.6〃 Asbestos 4.9〃

Claims (1)

[Scope of Claims] 1. After forming a waterproof layer on the surface of the base material and placing a lath net on top of the waterproof layer, Aggregate relative to 100vol% of the above cement
A wall exterior finishing method characterized by applying an exterior material composition containing 200 to 400 vol% of these materials to a predetermined thickness. 2. The wall exterior finish according to claim 1, characterized in that one or more of the following are used in combination as the inorganic foamed particle aggregate: perlite, anti-flint rock, porcelain, and foamed glass. Method.