JP5396207B2 - Construction method of panel for external heat insulation using calcium silicate board - Google Patents

Description

The present invention relates to a method of constructing the outer heat-insulating panels forming a wall surface or the like of a building with an outer heat-insulating panels using the calcium silicate board as insulation.

  In general, wooden boards used as building materials have disadvantages such as burning, decaying, and deforming, and they are also consumption materials for natural resources. Therefore, they should be used as building materials from the viewpoint of global environmental conservation and natural disasters. Is not preferred. For this reason, calcium silicate boards are being used as building materials for such wooden boards.

  Such a calcium silicate board has nonflammability, and there is no fear of decay or insect damage, and is excellent in durability. Moreover, since the same shape and the same quality can be mass-produced, it is convenient for production management. Because of such advantages, calcium silicate plates are used in various applications.

  On the other hand, as one of the construction methods, there is conventionally an outer heat insulation method in which a heat insulating material is provided on the outdoor wall surface of a building frame. The outer heat insulating structure obtained by the outer heat insulating method has a feature that the heat insulating property of the building frame is excellent and the temperature fluctuation in the room is small throughout the year because the heat insulating material is provided on the outside wall surface of the building frame.

  That is, the outer heat insulating structure has an effect of preventing the occurrence of internal condensation, which is a problem in the inner heat insulating structure, suppressing the generation of mold, and having high cooling / heating efficiency. In addition, since the building frame is not directly affected by temperature fluctuations in the outside air, there is no influence on the building frame due to heat and frost damage, and the life of the building frame can be greatly extended.

  In the outer heat insulation method, the heat insulation provided on the outside wall of the building frame is generally organic heat insulation such as rigid urethane foam, expanded polystyrene, phenol foam, or fibrous heat insulation such as rock wool or glass wool. It is done.

  However, there is a problem that organic heat insulating materials are likely to cause deterioration of heat insulating performance due to deterioration, are not fire resistant, and are liable to generate toxic gas in the event of a fire. Further, since the fibrous heat insulating material is gradually compressed by its own weight, there is a problem that a heat insulating gap is likely to be generated, and further, the heat insulating performance is deteriorated over time because it is weak against condensation and water.

  Therefore, it is desired to develop an outer heat insulating structure that can maintain good heat insulating performance for a long period of time and has excellent fire resistance. In addition, it has been desired to develop an outer heat insulation method capable of easily constructing such an outer heat insulating structure.

  In view of such a point, a patent application relating to an outer heat insulating method using a calcium silicate plate as a heat insulating material has been filed as in Patent Document 1 below. As described in claim 1 of Patent Document 1, the invention according to Patent Document 1 is described as follows: “Outside of a building frame made of reinforced concrete, steel reinforced concrete, or masonry with a calcium silicate plate. This is related to an outer heat insulating method characterized in that it is provided on a wall surface with or without an air layer.

  However, when such a calcium silicate plate is used as a heat insulating material for an outer heat insulating method, there is an important problem. That is, in such an outer heat insulating method, as described in claim 3 of Patent Document 1, after the calcium silicate plate is provided on the outdoor side wall surface of the building frame, the chamber of the calcium silicate plate is provided. A net is laid on the entire outer surface, and the anchor is driven so that the calcium silicate plate penetrates from the top of the net to reach the building frame, fixing the net and the calcium silicate plate, and the calcium silicate plate The building housing is fixed, and then a mortar base layer is formed on the net, and then an exterior material is provided on the mortar base layer with a mortar adhesive.

  In such a construction method, there is a problem that the calcium silicate plate itself does not have good adhesion to the mortar, and therefore there is a possibility that the base layer made of mortar may be peeled off.

Japanese Patent Laid-Open No. 2004-19179

  The present invention can easily construct an outer heat insulating structure having good fire resistance, non-flammability, heat insulating properties and durability, and causes an inadvertent peeling of an underlayer composed of mortar while using a calcium silicate plate. It is an object of the present invention to provide a panel for external heat insulation using a calcium silicate plate that is not allowed to occur.

The present invention own weight of 2.5 to 5.0 times the water-impregnated outer heat-insulating panels were Nurigi mortar on the surface of the calcium silicate board consisting of xonotlite was or its own weight, 1.3 to 3. A primer containing an alkali metal salt of silicic acid was applied to the surface of a panel for outer heat insulation in which mortar was applied to the surface of a calcium silicate plate made of tobermorite impregnated with 0 times water, The present invention provides a method for constructing an outer heat insulating panel, wherein the outer heat insulating panel is constructed by forming a surface layer or a base layer made of mortar on the surface of the outer heat insulating panel.

  Furthermore, as described above, the present invention applies a primer containing an alkali metal salt of silicic acid to a concrete body as described above, and impregnates water of 2.5 to 5.0 times its own weight through the primer. Mortar on the surface of a calcium silicate plate made of tobermorite impregnated with 1.3 to 3.0 times its own weight of water, or a panel for external heat insulation with a mortar coated on the surface of a calcium silicate plate made of zonotlite An outer heat insulating panel coated with is provided, a primer containing an alkali metal salt of silicic acid is applied to the surface of the outer heat insulating panel, and the surface of the outer heat insulating panel is made of mortar through the primer. The construction method of the panel for external heat insulation characterized by forming and constructing a surface layer or a foundation layer is provided.

  As described above, the present invention is a product obtained by impregnating a calcium silicate plate made of zonotlite included in a panel for external heat insulation with water of 2.5 to 5.0 times its own weight, or for external heat insulation. Since the calcium silicate plate made of tobermorite provided in the panel is impregnated with 1.3 to 3.0 times its own weight of water, the calcium silicate plate is impregnated with such a large amount of water. The adhesion of the mortar to the calcium silicate plate is very good, and there is an effect that inadvertent peeling of the ground layer made of mortar or the like is not caused.

  Moreover, the construction method of the panel for external heat insulation of this invention is the external heat insulation which apply | coated the mortar on the surface of the calcium silicate board which consists of a zonotlite impregnated with 2.5 to 5.0 times the self-weight as mentioned above. An alkali metal salt of silicate is applied to the surface of a panel for outer heat insulation or a panel of calcium silicate plate made of tobermorite impregnated with water 1.3 to 3.0 times its own weight. Since it is a method of applying a primer containing and forming a surface layer or an underlayer made of mortar on the surface of the outer heat insulating panel via the primer, the alkali metal silicate of the primer as described above However, it reacts with calcium in the mortar on the surface of the panel for outer heat insulation to form a film. By forming such a film, the penetration of moisture into the outer heat insulating panel is prevented, and the surface layer portion is strengthened. As a result, when mortar is applied as a surface layer or an undercoat layer to the surface of the outer heat insulating panel with such a strengthened surface layer portion, inadvertent peeling of the mortar from the surface of the outer heat insulating panel is also suitable. There is an effect that can be prevented.

  Furthermore, the construction method of the other panel for external heat insulation of this invention apply | coats the primer containing the alkali metal salt of a silicic acid to the frame which consists of concrete, and uses 2.5-5. A panel for external heat insulation in which mortar is coated on the surface of a calcium silicate plate made of zonotlite impregnated with 0 times water, or silicic acid made of tobermorite impregnated with 1.3 to 3.0 times its own weight of water An outer heat insulation panel coated with mortar is provided on the surface of the calcium plate, a primer containing an alkali metal salt of silicic acid is applied to the surface of the outer heat insulation panel, and the outer heat insulation panel is interposed through the primer. In the method of constructing and applying a surface layer or an underlayer made of mortar on the surface of the primer, the alkali metal silicate of the primer is mixed with calcium on the surface of the concrete frame. To respond, to the coating of. By forming such a film, the penetration of moisture into the housing is prevented and the surface layer portion is strengthened. As a result, in the case where the outer heat insulating panel is provided on the surface of the casing whose surface layer portion is reinforced, there is an effect that it is possible to suitably prevent inadvertent peeling of the outer heat insulating panel from the casing.

Sectional drawing which shows the construction example of the panel for external heat insulation as one Embodiment. Sectional drawing which shows the process of installing the panel for external heat insulation in a concrete formwork in the construction example of the panel for external heat insulation of the embodiment. Sectional drawing which shows the process of filling concrete in a concrete formwork in the construction example of the embodiment. Sectional drawing which shows the process of demolding the panel for outer heat insulation and concrete from a formwork in the construction example of the embodiment. Sectional drawing which shows the construction example of the panel for external heat insulation of other embodiment. The insulation figure which shows the process of installing the panel for external heat insulation in a metal mold | die in the construction example of the panel for external heat insulation of other embodiment. The heat insulation figure which shows the process of filling concrete in a metal mold | die in the construction example of the embodiment. The heat insulation figure which shows the process of demolding the panel for external heat insulation and concrete from a metal mold | die in the construction example of the embodiment.

  As described above, the panel for external heat insulation using the calcium silicate plate as an example of the present invention is a calcium silicate plate made of zonotlite impregnated with water 2.5 to 5.0 times its own weight, or its own weight. A calcium silicate plate made of tobermorite impregnated with 1.3 to 3.0 times as much water as the above is provided. Moreover, the panel for external heat insulation using the calcium silicate board as another example of the present invention is a calcium silicate board made of zonotlite impregnated with water 2.5 to 5.0 times its own weight, or 1 of its own weight. . Mortar is applied to the surface of a calcium silicate plate made of tobermorite impregnated with 3 to 3.0 times water.

  The reason why the adhesion of the mortar to the calcium silicate plate is improved by impregnating the calcium silicate plate with a large amount of water in this way is not necessarily clear, but it is estimated as follows. In other words, the calcium silicate plate has a very high water absorption capacity. Immediately after applying mortar that is still wet by mixing water, cement, and sand, water in the mortar is inadvertently prepared in the calcium silicate plate. As a result, a phenomenon called so-called dry-out occurs in which the mortar dries before solidifying to form an underlayer or the like on the surface of the calcium silicate plate. It is estimated that the balance of water absorption adjustment is lost and the mortar is inadvertently separated from the surface of the calcium silicate plate. In this respect, by impregnating calcium silicate plate made of zonotlite with water more than 2.5 times its own weight in advance, or by impregnating calcium silicate plate made of tobermorite with water of 1.3 or more of its own weight in advance. Thus, it is considered that the balance of water absorption adjustment of the calcium silicate plate is maintained and inadvertent peeling of the mortar from the surface of the calcium silicate plate is prevented.

  On the other hand, when impregnating calcium silicate plate made of zonotlite with water exceeding 5.0 times its own weight, or when impregnating calcium silicate plate made of tobermorite with water exceeding 3.0 times its own weight In this case, the saturated water content of the calcium silicate plate is exceeded, and the effect of preventing the mortar from being peeled unintentionally is not increased, and the quality of the calcium silicate plate may be deteriorated. From this viewpoint, it is more preferable that the water impregnated in the calcium silicate plate made of zonotlite is 3.0 to 4.5 times the own weight of the calcium silicate plate.

  The calcium silicate plate provided in the outer heat insulating panel of the present invention is a plate made of a silicate raw material, a calcareous raw material and a reinforcing fiber as main components and made by a wet machine and subjected to high temperature and high pressure steam curing by an autoclave. The autoclaved plate is a non-combustible material with a stable quality that has a strong and stable crystal structure and is less susceptible to aging and alteration due to temperature and humidity than other plates that do not have a crystal structure.

Type calcium silicate board is also not limited, xonotlite _{(6CaO · 6SiO 2 · H 2} O), and tobermorite a _{(5CaO · 6SiO 2 · 5H 2} O) may be used. Both zonotlite and tobermorite can be obtained by using a calcareous material and a siliceous material (SiO ₂ ) as main starting materials, kneading, molding and autoclaving.

  A cementitious material is usually used as the calcareous material. CaO and calcium hydroxide can also be used, but when autoclaving after demolding after molding, it is a self-hardening material, normal, early strength, super early strength, sulfate resistant, moderately hot, low heat Portland cement. Can be preferably used. In addition, blast furnace cement, fly ash cement, silica cement and the like which are mixed cements can be suitably used.

  On the other hand, as the siliceous material, silica fine powder mainly composed of α-quartz, silica fume, rice husk ash, fly ash and the like, which are industrial by-products, can be used. The mixing ratio of the calcareous material and the siliceous material is not particularly limited, but when the target product is tobermorite, 10 to 90 parts by weight of the calcareous material such as cement-based material and the siliceous material 90 to 10 parts by weight, more preferably 40 to 50 parts by weight of calcareous material and 60 to 50 parts by weight of siliceous material.

  The autoclave treatment temperature is generally 110 ° C. or higher. Specifically, depending on the target product, 180 ° C. is suitable for tobermorite and 200 ° C. is suitable for zonotrite, and 110 ° C. to 150 ° C. is suitable for hydrates having low crystallinity. .

  When forming a calcium silicate plate, the raw material slurry is poured into a mold, molded, or pressure dehydrated, or formed into paper, and then autoclaved under saturated steam pressure to obtain calcium silicate hydrate. Alternatively, there is a method in which calcium silicate hydrate is synthesized in advance by a stirring autoclave or the like and then dehydrated under pressure to obtain calcium silicate hydrate. In the latter method, an alkali-resistant glass fiber or the like can be added as a fiber reinforcing material during molding.

  As the fiber reinforcing material in this case, both organic and inorganic fibers can be used. Cellulose fiber, polypropylene fiber, aramid fiber, etc. can be used as organic fiber reinforcement, and glass fiber, carbon fiber, silicon carbide fiber, stainless steel fiber, aluminum fiber, etc. are used as inorganic fiber reinforcement. can do.

  Moreover, the construction method of the panel for external heat insulation of this invention is the panel for external heat insulation which apply | coated the mortar on the surface of the calcium-silicate board impregnated with water 2.5 to 5.0 times its own weight as mentioned above. Or an alkali metal salt of silicate on the surface of the panel for external heat insulation in which mortar is coated on the surface of a calcium silicate plate made of tobermorite impregnated with water 1.3 to 3.0 times its own weight In this method, a primer is applied, and a surface layer or base layer made of mortar is formed on the surface of the outer heat insulating panel via the primer to form a surface layer.

  Furthermore, as described above, another method for constructing a panel for external heat insulation of the present invention is to apply a primer containing an alkali metal salt of silicic acid to a concrete casing, and through the primer, 2. Apply mortar on the surface of a calcium silicate plate made of zonotlite impregnated with 5 to 5.0 times water or a calcium silicate plate made of tobermorite impregnated with 1.3 to 3.0 times its own weight of water. A surface made of mortar on the surface of the outer heat insulation panel via the primer, and a primer containing an alkali metal salt of silicic acid is applied to the surface of the outer heat insulation panel. It is a method of forming and forming a layer or a foundation layer.

  As the alkali metal salt of silicic acid contained in the primer, potassium silicate is mainly used. However, it is also possible to use lithium silicate or sodium silicate. In addition to the alkali metal salt of silicic acid, the primer can contain, for example, a surfactant.

  Furthermore, the alkali metal salt of silicic acid used as a primer is normally used in the state of aqueous solution. The concentration of the aqueous solution is not particularly limited. For example, in the case of potassium silicate, the concentration of the aqueous potassium silicate solution is preferably 4 to 45% by weight, and preferably 6 to 35% by weight. More preferably, it is 7 to 20% by weight. Moreover, it is preferable that PH is about 9-11.

Hereinafter, more specific embodiments of the present invention will be described.
(Embodiment 1)
This embodiment demonstrates the construction example of one Embodiment which performs an external heat insulation construction using the panel for external heat insulation which comprises a calcium-silicate board.

  In this embodiment, as shown in FIG. 1, an outer heat insulating panel 2 including a calcium silicate plate is provided on the outer surface side of a concrete casing 1, and a mortar is provided on the outer surface side of the outer heat insulating panel 2. The present invention is applied to a structure such as a building to which a large number of tiles 4 are attached via a base layer 3 made of

  As described above, the outer heat insulating panel 2 is a calcium silicate plate made of zonotlite impregnated with 2.5 to 5.0 times its own weight of water, or 1.3 to 3.0 times its own weight of water. A calcium silicate plate made of tobermorite impregnated with mortar is applied and cured.

  When constructing such a structure such as a building, first, as shown in FIG. 2, plywood 6 and 6 for concrete formwork are arranged, and one of the plywood 6 of the plywood 6 and 6 is arranged. The outer heat insulation panel 2 is arranged on the inner surface side, and then the concrete 1a is filled in the space between the plywoods 6 and 6, as shown in FIG.

  Next, by removing the plywood 6 and 6 for concrete formwork and removing the plywood, as shown in FIG. 4, the panel 2 for heat insulation having a calcium silicate plate on the outer surface side of the frame 1 of the concrete 1a is obtained. Will be provided. Then, although not shown in figure, the primer which consists of potassium silicate salt is apply | coated to the outer surface side of the panel 2 for external heat insulation, and mortar is apply | coated through the primer, and the base layer 3 is formed. Then, by attaching a large number of tiles 4 to the surface of the base layer 3, a structure such as a building as shown in FIG. 1 is formed.

(Embodiment 2)
This embodiment is a construction example of another embodiment in which outer heat insulation is performed using an outer heat insulation panel including a calcium silicate plate. In the present embodiment, as shown in FIG. 5, an outer heat insulating panel 2 including a calcium silicate plate is provided on the outer surface side of the concrete casing 1, and the outer heat insulating panel 2 is painted on the outer surface side. Is applied to a structure such as a building in which the surface layer 5 is formed. As the paint to be applied, mortar or the like can be used, but the type is not particularly limited.

  As the outer heat insulating panel 2, as in the first embodiment, a calcium silicate plate made of zonotlite impregnated with water 2.5 to 5.0 times its own weight, or 1.3 to 3.0 of its own weight. A calcium silicate plate made of tobermorite impregnated with double water is applied with mortar and cured.

  Also in the present embodiment, as in the first embodiment, as shown in FIG. 2, the plywood 6 and 6 for concrete formwork are arranged, and the outer heat insulation is provided on the inner surface side of one of the plywood 6 and 6. After the panel 2 is arranged, the concrete 1a is filled in the space between the plywoods 6 and 6 as shown in FIG. 3, and the plywoods 6 and 6 are removed and removed from the mold, as shown in FIG. An outer heat insulating panel 2 having a calcium silicate plate is provided on the outer surface side of the housing 1 of 1a.

  Thereafter, a primer made of potassium silicate is applied to the outer surface side of the panel 2 for outer heat insulation, and mortar is applied through the primer to form the surface layer 5, thereby building as shown in FIG. And the like are formed.

(Embodiment 3)
This embodiment is a construction example of another embodiment in which outer heat insulation is performed using an outer heat insulation panel including a calcium silicate plate. Also in the present embodiment, the outer heat insulating panel 2 including the calcium silicate plate is provided on the outer surface side of the concrete casing 1 as in the second embodiment, and the outer surface side of the outer heat insulating panel 2 is coated. This is applied to a structure such as a building in which the surface layer 5 is formed. However, the construction procedure is different from that of the second embodiment.

  That is, in this embodiment, a primer made of potassium silicate is applied to the outer surface side of the existing concrete frame 1, and the outer heat insulating panel 2 is attached via the primer, and the outer heat insulating panel 2 is attached. The surface layer 5 is formed by applying a primer made of the same potassium silicate as described above to the outer surface side of the, and applying mortar through the primer.

  As the outer heat insulation panel 2, as in the first and second embodiments, a calcium silicate plate made of zonotlite impregnated with water 2.5 to 5.0 times its own weight, or 1.3 to 3 of its own weight. A calcium silicate plate made of tobermorite impregnated with 0.times. Water is coated with mortar and cured. While the first and second embodiments are applied to a new wall surface such as a building, the present embodiment is applied to an existing wall surface.

(Embodiment 4)
This embodiment is a construction example of another embodiment in which outer heat insulation is performed using an outer heat insulation panel including a calcium silicate plate. In this embodiment, as shown in FIG. 6, the outer heat insulation panel 2 is accommodated in the mold 7, and then the concrete 1 a is filled in the space of the mold 7 as shown in FIG. 7.

  Thereafter, by removing the outer heat insulating panel 2 and the concrete 1a from the mold 7, the outer heat insulating panel 2 having a calcium silicate plate is provided on the outer surface side of the casing 1 of the concrete 1a. In this embodiment, the external insulation panel 2 is attached to the frame 1 of the concrete 1a in advance in a factory or the like, and what is attached with the external insulation panel 2 in this manner is applied to a construction site or the like. It will be transported and constructed.

  As the outer heat insulation panel 2, as in the first to third embodiments, a calcium silicate plate made of zonotlite impregnated with water 2.5 to 5.0 times its own weight, or 1.3 to 3 of its own weight. A calcium silicate plate made of tobermorite impregnated with 0.times. Water is coated with mortar and cured.

Example 1
A commercially available calcium silicate plate made of zonotlite (trade name: New Best Light (manufactured by Nippon Insulation Co., Ltd.) 300 mm × 300 mm × 25 mm) was immersed in water contained in the container for about 5 hours and left to stand. The weight of the calcium silicate plate before being immersed in water was 450.1 g, and the weight of the calcium silicate plate after being immersed in water was 218.6 g. As a result, it was found that the calcium silicate plate was impregnated with 3.73 times its own weight of water.

(Example 2)
A calcium silicate plate made of tobermorite (manufactured by Nichias Co., Ltd .: 100 mm × 100 mm × 6 mm) was immersed in water contained in the container for about 2 hours and allowed to stand. The weight of the calcium silicate plate before and after being immersed in water was measured, and as a result, it was found that the calcium silicate plate was impregnated with 2.0 times its own weight of water.

DESCRIPTION OF SYMBOLS 1 Housing 2 Panel for outer heat insulation 3 Underlayer 5 Surface layer

Claims (6)

Contains an alkali metal salt of silicic acid on the surface of the panel for external heat insulation (2) in which mortar is coated on the surface of a calcium silicate plate made of zonotlite impregnated with water 2.5 to 5.0 times its own weight The outer heat insulation is characterized in that a surface layer (5) or a ground layer (3) made of mortar is formed on the surface of the outer heat insulating panel (2) through the primer and applied. Panel construction method. Contains an alkali metal salt of silicic acid on the surface of the panel for external heat insulation (2) in which mortar is applied to the surface of a calcium silicate plate made of zonotlite impregnated with 3.0 to 4.5 times its own weight of water. The outer heat insulation is characterized in that a surface layer (5) or a ground layer (3) made of mortar is formed on the surface of the outer heat insulating panel (2) through the primer and applied. Panel construction method. Contains an alkali metal salt of silicic acid on the surface of the panel for external heat insulation (2) in which mortar is applied to the surface of a calcium silicate plate made of tobermorite impregnated with 1.3 to 3.0 times its own weight of water The outer heat insulation is characterized in that a surface layer (5) or a ground layer (3) made of mortar is formed on the surface of the outer heat insulating panel (2) through the primer and applied. Panel construction method. Silica composed of zonotolite obtained by applying a primer containing an alkali metal salt of silicic acid to a concrete body (1) and impregnating 2.5 to 5.0 times its own weight with water through the primer. An external heat insulation panel (2) coated with mortar is provided on the surface of the calcium plate, and a primer containing an alkali metal salt of silicic acid is applied to the surface of the external heat insulation panel (2). A method for constructing an outer heat insulating panel, comprising forming a surface layer (5) or a ground layer (3) made of mortar on the surface of the outer heat insulating panel (2). Silicate composed of zonotlite, in which a primer containing an alkali metal salt of silicic acid is applied to the concrete frame (1) and impregnated with 3.0 to 4.5 times its own weight of water through the primer. An external heat insulation panel (2) coated with mortar is provided on the surface of the calcium plate, and a primer containing an alkali metal salt of silicic acid is applied to the surface of the external heat insulation panel (2). A method for constructing an outer heat insulating panel, comprising forming a surface layer (5) or a ground layer (3) made of mortar on the surface of the outer heat insulating panel (2). Silica composed of tobermorite coated with a primer containing an alkali metal salt of silicic acid on the concrete body (1) and impregnated with 1.3 to 3.0 times its own weight of water through the primer An external heat insulation panel (2) coated with mortar is provided on the surface of the calcium plate, and a primer containing an alkali metal salt of silicic acid is applied to the surface of the external heat insulation panel (2). A method for constructing an outer heat insulating panel, comprising forming a surface layer (5) or a ground layer (3) made of mortar on the surface of the outer heat insulating panel (2).

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