JPS5850250A - Exterior finish of wall surface - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

Conventionally, the exterior finishing of such walls was generally done by covering the surface of a base made of plywood or the like with a waterproof sheet such as tar felt.
After laying a lath net over it, it is common to finish it by applying mortar two to three times to a thickness of 20 to 25 cm. 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 form 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. Unfortunately, it is actually not widely used.

On the other hand, in the framework type construction method 1 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 of the plaster. However, when asphalt emulsion and synthetic resin emulsion are individually mixed to form a mixture, if the emulsifier, thickener, etc. are not well matched, they may separate or the advantages of both may not be fully exhibited. In other words, asphalt emulsions are mainly used to improve waterproofness, and synthetic resin emulsions are used to increase adhesion to heavy topcoats (cement stucco). If the desired function (adhesive force) is not fully achieved, the risk of the topcoat falling off due to its large weight cannot be eliminated, and in addition, since the above-mentioned composition is originally softened by heat,
It is not possible to completely prevent the top coat of cement stucco from shedding or peeling 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 though the adhesion is strong, it cannot be said that there is no risk of the cement stucco topcoat cracking easily and peeling 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 invention is to provide an efficient method for finishing the exterior of a wall.

Therefore, this invention forms a waterproof layer on the surface of the base material,
After laying a lath net on top of it, cement, fiber material,
The present invention provides a method for finishing an exterior wall surface, which comprises applying an exterior material composition in which these are mixed together as a foam particle aggregate component to a predetermined thickness by spraying.

Formation of the waterproof layer is most commonly performed in the same manner as in the conventional construction method. This is done by placing a waterproof sheet such as tar felt on the surface of the base material, but it is also possible to create a waterproof layer by applying rubber asphalt φ4 resin or a mixed composition of asphalt, synthetic resin emulsion, filler, etc. It may also be formed.

The fiber materials used in the exterior material composition include rock wool, asbestos,
Glass fibers, tailings, natural or synthetic fiber waste, etc. may be mentioned, and examples of the foamed particle aggregate include perlite, flint retardant, porcelain, foamed glass, foamed polystyrene powder, etc. These fibrous materials and foamed particle aggregates can be used alone or in combination of two or more. Furthermore, the finishing material composition according to the present invention contains, in addition to the above-mentioned cement, fibrous material, and foamed particle aggregate,
Furthermore, if necessary, inorganic admixtures such as dolomite plaster and calcium carbonate and other additives may be added. The blending amounts of cement, fibrous materials, and foamed particle aggregate can be freely changed depending on the degree of fire retardancy, heat insulation, dew condensation prevention, etc. required for the wall surface to be constructed, but generally speaking. The foamed particle aggregate is 30-4001% compared to 1001% cement. Fiber substances are 10-1501
By the way, in Example 1, which will be described later, perlite is 2241. In addition, in Example 2, cement was 100j, pearlite was 34'31, and tailing was 111. The glass fiber is 11j, and the rock wool is about 61.21.

The above-mentioned exterior material composition is applied particularly by spraying to the surface of the base material on which the lath net is stretched to form a waterproof layer. The thickness of this coating layer is about 5 to 1゜■. After base spraying, it may be finished by top spraying with the same material, or the above coating layer may be used as an undercoat layer and a regular The cement stucco may be sprayed or painted. If the surface is further coated with paint such as acrylic resin, a more beautiful and waterproof finished surface can be obtained.

According to this invention, since the exterior material composition contains cement, fibrous material, and foamed particle aggregate as main materials, the latter two have a great effect on preventing cracks in the paint layer itself. Since this is applied by spraying on the base wall surface covered with lath netting, the coating layer hugs the lath netting and is firmly integrated with it.
Unlike the case of troweling, between the waterproof layer and the waterproof layer, it is lightly adhered and allows some movement of the contact surface, so the effects of distortion of the building and expansion and contraction of the base material will be reduced. Since it is blocked by the waterproof layer, direct spraying rarely reaches the coating layer, and therefore, cracks in the coating layer are reliably prevented. Moreover, since it contains cement as a main component, even if ordinary cement stucco is applied as a top coat thereon, it can be made to have excellent adhesion integrity with it.

In addition, the exterior material composition can be made extremely lightweight by containing foamed particle aggregate and fibrous material, and can eliminate the risk of peeling or falling off of the coating layer of the composition. Since it is lightweight and spraying is a construction method, it has good workability on site and can significantly shorten the construction period. Further, since the coating layer of the exterior material composition according to the present invention has low thermal conductivity, it is effective as an energy-saving wall, and can form an exterior wall with excellent heat insulation, dew condensation prevention, fire retardance, etc. - Below, various suitable formulation examples of the exterior material composition used in the present invention will be shown as examples of the present invention, particularly as novel products.

Example 1 Cement 100 parts by weight Inorganic admixture (calcium carbonate) 34 Kansuiseki (3 liters)
2o Ethylene/vinyl acetate copolymer powder 6
Weight division cotton
6 Perlite 3o
〃Other additives 4 〃Example 2 Cement 100 parts by weight Tailings 8 〃Glass fiber
1 #Iwawata
18 Perlite
84 Example 3 Cement Zoo weight part silica sand
16 〃 Glass (fiber) 5 “Pearlite 75 〃 Styrofoam
15 Ethylene/vinyl acetate copolymer powder 2
．． 5 #Asbestos 5 Rock Cotton 2.5 parts by weight Example 4 Cement 100 parts by weight Silica sand
26.5〃 Pearlite 33.2” Ethylene・
Vinyl acetate copolymer powder 1.6 Asbestos
4.9 Written amendment to the above procedures.

October 21, 1981 Patent Application No. 137195 3, Relationship with the case of the person making the amendment Patent applicant 4, Agent 5, Date of amendment order (voluntary amendment) 6. Inventions increased by amendment Number 8, Contents of amendment (1) "The above cement" in line 13 of page 5 of the specification is corrected to "cement."

121 The same book, page 6, line 13 [This coating layer thickness is 5~
10-] is corrected to [the total layer thickness of this coating layer thickness is 5 to 20].

[31 In the same book, page 8, line 3, before the word ``very'', add [its weight is that of ordinary cement stucco].

(4) Next to “thermal conductivity” on page 8, line 9 of the same book,
Approximately as much as ordinary cement stucco.

15) In the same book, page 8, line 11, add ``simple and inexpensive'' next to ``outer walls.''

Procedural Amendment 1, Incident Relation to Patent Application No. 137195 of 1982
Patent applicant 4, agent 6, the number of inventions to be increased by the amendment to 8, the entire text of the description of the contents of the amendment is amended in the attached supplementary specification.

Amended Description 1, Name of the Invention, Wall Exterior Finishing Method 2, Claims After forming a waterproof layer on the surface of the base material and stretching a lath net over it, cement, fibrous material, and foamed material are applied. A wall exterior finishing method comprising applying an exterior material composition containing particle aggregate as a main component and a mixture thereof to a predetermined thickness.

3. Detailed Description of the Invention The present invention relates to a method for finishing the exterior of walls, particularly exterior walls, in buildings and pharmaceuticals.

Conventionally, the exterior finishing of such walls was generally done by covering the surface of a base material such as plywood with a waterproof sheet such as tar felt.
After laying a lath net over it, it is normal to finish it by applying two to three coats of mortar to a thickness of 20 to 25 cm. However, the above-mentioned mortar application work performed in two or three times not only poses a major obstacle to saving labor and shortening the time required for on-site work, but also increases the temperature between the mortar layer and the underlying surface. It was undeniable that a difference in elongation of 1 m due to changes in humidity would inevitably cause cracks in the mortar. 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 are expensive. It has its drawbacks and is not widely used in practice.

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, and then The method of applying cement stucco is adopted. However, when asphalt emulsion and synthetic resin emulsion are individually mixed to form a mixture, if the emulsifier, thickener, etc. are not well matched, they may separate or the advantages of both may not be fully exhibited. In other words, asphalt emulsions are used primarily to improve waterproofness, and synthetic resin emulsions are used primarily to increase adhesion to top coats (cement stucco). If the desired function (adhesion) is not fully achieved, the risk of the top coat falling off due to its large weight cannot be eliminated, and in addition, since the above composition is originally softened by heat,
It is not possible to completely prevent the top coat of 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 though the adhesion is strong, it cannot be said that there is no risk of the cement stucco topcoat cracking easily and peeling or falling off.

In view of the above-mentioned drawbacks of the prior art, this invention
The purpose of this project is to provide a wall exterior finishing method that prevents cracks from forming on the surface, and that can easily and efficiently finish exterior walls with excellent heat insulation and dew condensation properties by eliminating the conventional mortar process. be.

Therefore, this invention forms a waterproof layer on the surface of the base material,
After laying a lath net on top of it, cement, fiber material,
The present invention provides a method for finishing a wall exterior, which is characterized in that an exterior material composition containing foamed particle aggregate as a main component and a mixture thereof is applied to a predetermined thickness by troweling or spraying.

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

The fiber materials used in the exterior material composition include rock wool, asbestos,
Glass fibers, tailings, natural or synthetic fiber waste, etc. can be mentioned, and examples of the foamed particle aggregate include perlite, anti-flint stone, porcelain, foamed glass, foamed polystyrene powder, and the like. These fibrous materials and foamed particle aggregates may be used alone or in combination of two or more. Furthermore, the finishing material 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 material, and foamed particle aggregate. There is also.

The amounts of cement, fibrous material, and foamed particle aggregate are as follows:
It can be changed freely depending on the degree of fire prevention, heat insulation, dew condensation prevention, etc. required for the wall surface to be constructed, but in general, cement (Cement) is 1001, while foamed particle aggregate is 30 to 4001. The appropriate fiber material is about 10 to 150j. By the way, Example 1 described below uses cement 100
1, perlite is 224 parts, rock wool is about 271 parts, and in Example 2, cement is 100j, vanillaite is 3431 parts, and tailings are 11 parts. , glass fiber 1111 and rock wool 61.21.

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 under-spraying and then top-spraying with the same material, or by using the above-mentioned coating layer as an undercoat and then applying the top coat. Ordinary cement stucco can be sprayed or painted. If the surface is further coated with paint such as Acrylic Jusushi, a more beautiful and waterproof finish can be obtained.

According to this invention, since the exterior material composition contains cement, fibrous material, and foamed particle aggregate as main materials, the latter two have a great effect on preventing cracks in the paint layer itself. Then, this is applied to the base wall surface covered with the lath net to a predetermined thickness by troweling or spraying, so the coating layer hugs the lath net and is firmly integrated with it. Unlike the case of troweling with cement mortar, which has a large weight, it adheres lightly to the waterproof layer below, allowing some movement of the contact surface, which prevents distortion of the building and the foundation. The effects of expansion and contraction of the material are blocked by the waterproof layer and are less likely to directly affect the coating layer, thus reliably preventing cracks from forming in the coating layer. Moreover, by containing cement as the main component, even if ordinary cement stucco is applied as a top coat thereon, it can be made to have excellent adhesion integrity. In addition, because the exterior material composition contains foamed particle aggregate and fibrous material, its weight is about 1/1 that of ordinary cement stucco.
3, it can be made very lightweight, and it can eliminate the risk of peeling or falling off of the coating layer of the composition, and it is lightweight, and spraying is a construction method. It has good workability on site and can significantly shorten the construction period. Furthermore, the coating layer of the exterior material composition according to the present invention has a thermal conductivity of about 1 that of ordinary cement stucco.
15, it is possible to easily and inexpensively form an outer wall that is effective as an energy-saving wall and has excellent heat insulation, dew condensation prevention, fire prevention, etc.

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 admixture (calcium carbonate) 34 Kansuiseki (3 liters)
20 Ethylene/vinyl acetate copolymer powder 6
〃Iwawata
6 Perlite 30
Other additives 4 Example 2 Cement 100 parts by weight Tailings 8 Glass fiber
1 Rock cotton
18 ・I perlite
84 I/Example 3 Cement 100 parts by weight Silica Sand 16 I/Glass fiber, 5 parts by weight Perlite
75 Styrofoam
15 Ethylene e-vinyl acetate copolymer powder 2.
5. 〃Asbestos' 5 〃Rock
Cotton 2.5〃Example 4 Cement 100 parts by weight Silica Sand 265〃Pearlite 33.2 "1 Shine-vinyl acetate copolymer powder 1.6〃Asbestos
4.9 or more

Claims (1)

[Claims] After a waterproof layer is formed on the surface of the base material and a lath net is stretched over it, an exterior material composition consisting of cement, fiber material, and foamed particle aggregate as the main components and mixed together is sprayed according to the law. A wall exterior finishing method characterized by applying the coating to a predetermined thickness.