JP2014047544A - Outer covering component of building, and outer covering paint material composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an appropriate constitution of an outer covering component of a building, using an outer covering paint material composition including scallop shell powder.SOLUTION: An outer covering component 1C forming an outer covering of a building includes at least: a layer of an outer covering primer coating material 1C1 applied to an indoor side; and a layer of an outer covering finish coating material 1C3 applied to the outdoor side surface of the layer of the outer covering primer coating material 1C1. The outer covering primer coating material is prepared by adding moisture to an outer covering primer coating material composition, and the outer covering primer coating material composition contains at least a 10-20 mass% scallop shell powder obtained by pulverizing scallop shell to screen it within a particle size range of 0.20 mm to 0.70 mm and a 50-70 mass% solidification material. The outer covering finish coating material is prepared by adding moisture to an outer covering finish coating material composition, and the outer covering finish coating material composition contains at least a 35-45 mass% scallop shell powder and a 25-45 mass% solidification material. The scallop shell may be pulverized after it is burnt at 470°C to 530°C.

Description

  The present invention relates to an exterior coating composition containing scallop shell powder and a building exterior structure using the same.

  Since scallops are used only for scallops, large quantities of scallop shells are industrial waste. Conventionally, several techniques for using such scallop shells as building materials have been proposed.

  Patent document 1 is disclosing the stucco material and tile which have scallop shell powder as a main component, and a manufacturing method. In Patent Document 1, scallop shell is fired at 350 to 450 ° C. as a stucco material, and the maximum particle size of scallop shell powder mainly composed of calcium carbonate obtained by pulverizing the shell is 2 mm, and the 1000 μm sieve is 95 to 100 mass%. The scallop shell powder whose particle size is adjusted so that the 780 µm sieve under 95 to 100 mass% and the 75 µm sieve under 5 mass% or less is blended so as to be 40 to 60 mass% of the total amount of the plaster material excluding moisture. Other components of the plaster material include slaked lime, soot and pigments. In the case of tiles, other components include slaked lime, white cement, lightweight aggregate, soot and pigment. In either case, water is added and kneaded. In the case of a tile, it is press-molded into a predetermined shape.

JP 2007-284294 A

  As described above, a stucco material mainly composed of scallop shell powder is presented, but a suitable application form to an actual building is not presented. In particular, scallop shell powder has excellent sterilizing power and durability, so it can be applied to places where mold and algae are likely to be generated in buildings, such as outdoor temperature and humidity, and exteriors exposed to weather such as wind and rain. Expected to be preferable.

  In view of the above, an object of the present invention is to provide a suitable configuration of a building exterior component using an exterior coating composition containing scallop shell powder.

In order to achieve the above object, the present invention provides the following configuration. In addition, the code | symbol in parenthesis is the code | symbol in drawing which illustrated embodiment mentioned later, and attaches | subjects it here for reference.
According to a first aspect of the present invention, in the exterior structure (1C) that forms the exterior of a building, a layer of an exterior undercoat material (1C1) applied indoors and a layer of the exterior undercoat material (1C1) An exterior overcoat (1C3) layer applied to the outer surface, and the exterior undercoat (1C1) is prepared by adding moisture to the exterior undercoat composition, The exterior undercoat material composition comprises 10 to 20% by mass of scallop shell powder obtained by pulverizing scallop shells and screening to a particle size range of 0.20 mm to 0.70 mm, and 50 to 70% by mass of solidified material. The exterior topcoat (1C3) is prepared by adding moisture to the exterior topcoat composition, and the exterior topcoat composition is 35 to 45% by mass of the scallop shell. Powder and 25-45 mass% solidifying material; , At least.

Said aspect WHEREIN: It is suitable for the said scallop shell powder to grind | pulverize after baking a scallop shell shell at 470 degreeC-530 degreeC.
In addition, it is preferable to further include a net-like reinforcing material (1C2) embedded in the layer of the exterior undercoat material (1C1).
Moreover, it is preferable to further have a layer of the overcoat material (1C5) applied to the outdoor side of the layer of the exterior topcoat material (1C3).
Moreover, it is suitable that the layer of the exterior undercoat material (1C1) is applied to the surface on the outdoor side of the heat insulating board (1B3) installed outside the building housing.

  According to a second aspect of the present invention, there is provided a layer of an exterior undercoat (1C1) applied to the indoor side and an exterior overcoat (1C3) applied to the outdoor side surface of the exterior undercoat (1C1) layer. And an exterior primer composition other than moisture constituting the exterior primer in the exterior structure (1C) that forms at least a building exterior, and scallop shells are crushed to 0.20 mm to 0 mm It is characterized by containing at least 10 to 20% by mass of scallop shell powder sieved to a particle size range of 70 mm and 50 to 70% by mass of a solidified material. The scallop shell powder is preferably pulverized after firing the scallop shell at 470 ° C to 530 ° C.

  According to a third aspect of the present invention, there is provided a layer of an exterior primer (1C1) applied on the indoor side and an exterior overcoat material (1C3) applied on the outdoor side surface of the exterior primer (1C1) layer. And an exterior topcoat material composition other than moisture that constitutes the exterior topcoat material in the exterior structure (1C) that forms at least the exterior of the building. The scallop shell is crushed to 0.20 mm to 0 mm It contains at least 35 to 45% by mass of scallop shell powder that has been sieved to a particle size range of 70 mm and a solidified material of 25 to 45% by mass. The scallop shell powder is preferably pulverized after firing the scallop shell at 470 ° C to 530 ° C.

  The building exterior structure according to the present invention has a configuration in which two layers of exterior coating materials prepared by adding moisture to two types of exterior coating material compositions having different compositions containing scallop shell powder are laminated. . The two types of exterior coating material compositions are an exterior undercoat material composition and an exterior topcoat material composition, and the two types of exterior coating materials are an exterior undercoat material and an exterior topcoat material. The exterior undercoat layer located on the indoor side has a small proportion of scallop shell powder and a large proportion of solidified material, and constitutes an exterior base for the indoor side while maintaining the sterilizing power and durability of scallop shell powder. It can be firmly joined to the surface of the member. On the other hand, the exterior topcoat layer located on the outdoor side has a large proportion of scallop shell powder and a small proportion of solidified material, and is suitable for protection from the outdoor environment due to the sterilization power and durability of scallop shell powder. At the same time, a finished surface with white and smoothness can be obtained. The combination of these two layers realizes an exterior structure utilizing the features of scallop shell powder.

  In any exterior coating material composition, a scallop shell powder having a particle size range of 0.20 mm to 0.70 mm is selected. By eliminating the range of 0.70 mm or more, it is possible to secure a workability that is easy to apply and to obtain a smooth finished surface with no surface roughness due to large-diameter particles. Further, by eliminating the range of less than 0.20 mm, generation of fine cracks after curing is avoided. This is because the smaller the particle size, the denser it is, but it tends to shrink and easily crack.

  The scallop shell powder may be an unfired powder, but it is more effective if it is a fired powder. In the case of a baked powder, it is preferable to fire at 470 ° C to 530 ° C. This firing temperature is for avoiding the transformation from calcium carbonate to quick lime that occurs when firing at a high temperature of 700 ° C. or higher. Quick lime gradually changes to slaked lime when it returns to room temperature, but cannot fulfill its role as an aggregate, that is, a function to ensure strength. In the present invention, scallop shell powder is included as an aggregate in the exterior coating composition, and the solidifying material is added separately. The scallop shell powder serves as an aggregate, and the solidified material combines the particles of the scallop shell powder to ensure the strength as a whole.

  Since scallop shell powder is made from industrial waste of scallop shell generated in large quantities, it can be manufactured at low cost.

In addition, the strength of the exterior structure can be improved by embedding a net-shaped reinforcing material in the exterior undercoat material layer.
Moreover, the layer of the overcoat material applied on the outdoor side of the outer overcoat material layer can protect the surface facing the outdoors.
Moreover, it becomes possible to combine an exterior structure body with an external heat insulation construction method suitably by apply | coating the exterior undercoat material to the heat insulation board installed in the outdoor side of the building frame. The structural frame can be applied to both reinforced concrete and wooden structures.

It is the expansion | deployment perspective view which showed typically the example which applied the exterior structure body by this invention to the outer wall of a wooden building. FIG. 2 is an exploded perspective view schematically showing an example in which the exterior structure according to the present invention is applied to the outer wall of a reinforced concrete building. FIG. 3 is a view schematically showing a cross section of the exterior structure body 1 </ b> C of FIGS.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an exploded perspective view schematically showing an example in which an exterior structure according to the present invention is applied to an outer wall of a wooden building.

  The structural frame of the outer wall 10 of the wooden building has a pillar 1A1 and an inter-column 1A2, and a structural plywood 1A3 is fixed to these outdoor sides. A gap between the column 1A1 and the inter-column 1A2 is filled with a filling heat insulating material 1B1 such as glass wool or rock wool. On the outdoor side of the structural plywood 1A3, a heat insulating board 1B3 such as polystyrene foam is installed via a moisture permeable waterproof sheet 1B2. An exterior component 1C is provided on the outdoor side of the heat insulation board 1B3.

  The exterior structure 1C has a laminated structure composed of a plurality of constituent elements each extending in a planar shape. An exterior primer 1C1 is provided as the most indoor layer. The exterior undercoat material 1C1 is applied on the outdoor side surface of the heat insulating board 1B3. The thickness of the exterior undercoat material 1C1 is, for example, 1.5 to 2.5 mm, but is not limited to this range. The reinforcing material 1C2 is preferably embedded in the layer of the exterior undercoat material 1C1. The reinforcing material 1C2 is, for example, a glass fiber net (for example, a fiber diameter of 0.35 mm and a mesh of about 4 mm × 4 mm).

  A layer of the exterior topcoat material 1C3 is applied to the surface on the outdoor side of the exterior undercoat material 1C1. The thickness of the exterior overcoat 1C3 is, for example, 1.5 to 2.5 mm, but is not limited to this range.

  A layer of the overcoat material 1C5 that is the outermost layer is applied to the outdoor side of the exterior topcoat material 1C3 via an optionally applied overcoat adjustment material 1C4 layer. The overcoat material 1C5 is for surface protection, and is, for example, an acrylic resin-based finishing coating material for buildings. The overcoat adjusting material 1C4 is applied when it is necessary to assist or reinforce the overcoat material 1C5.

  The thickness of the overcoat adjusting agent 1C4 and the overcoat material 1C5 is thinner than that of the exterior undercoat material 1C1 and the exterior overcoat material 1C3. The thickness of the main part of the exterior structure 1C depends on the layer of the exterior undercoat material and the layer of the exterior overcoat material.

  As shown in the example of FIG. 1, the exterior structure 1C of the present invention is preferably combined with an outer heat insulating method (also referred to as an outer heat insulating method). In the outer heat insulating method, the heat insulating board 1B3 is arranged on the outdoor side of the building frame. 1C of the exterior structure of FIG. 1 also plays a role of protecting the heat insulation board 1B3 from the outdoor environment. This is due to the excellent durability, bactericidal properties and moisture permeability due to the inclusion of scallop shell powder.

  A feature of the exterior component 1C is that two layers of an exterior undercoat 1C1 and an exterior overcoat 1C3 are combined. Each of these layers is obtained by applying a kneaded material to which moisture has been added to an exterior coating material composition containing scallop shell powder. The component composition of the exterior coating composition constituting each layer is different. In the present specification, among exterior coating compositions, those used for exterior undercoat materials are referred to as “exterior undercoat composition”, and those used for exterior overcoat are referred to as “exterior overcoat composition”. “Exterior coating composition” is a general term for these. Table 1 shows a blending example of the exterior coating composition. The exterior coating composition does not contain moisture added during construction.

  The exterior undercoat composition that forms the layer of the exterior undercoat 1C1 is composed of 10 to 20% by mass of scallop shell powder, 50 to 70% by mass of solidified material, and the remaining other components. For example, ordinary cement is suitable as the solidifying material of the exterior primer composition. Other types of cement may be used as needed.

  On the other hand, the exterior topcoat material composition forming the layer of the exterior topcoat material 1C3 is composed of 35 to 45% by mass of scallop shell powder, 25 to 45% by mass of solidified material, and the remaining other components. The solidifying material of the exterior topcoat composition is preferably a mixture of white cement and slaked lime (for example, an appropriate ratio such as 1: 1, 2: 1, or 1: 2).

  Other components in the exterior coating composition are inorganic lightweight aggregates or admixtures such as cryolite and pearlite, and organic additives such as acrylic resins. You may add the additive used for a general exterior coating material as needed.

  Scallop shell powder plays a role as an aggregate of the exterior coating composition. In the exterior undercoat material composition, it is preferable that the amount of the solidified material is larger than the amount of the scallop shell powder, while in the exterior overcoat material composition, the amount of the scallop shell powder is larger than the amount of the solidified material. is there. The exterior undercoat material composition contains a large amount of a solidifying material so as to be firmly fixed to a constituent member serving as an exterior base on the indoor side. Since the exterior topcoat composition is directly affected by the outdoor environment, it contains a large amount of scallop shell powder for the bactericidal activity and durability of the scallop shell powder to protect it from the outdoor environment. This is also to ensure whiteness and smoothness on the finished surface by scallop shell powder.

  The scallop shell powder is pulverized after firing the scallop shell, or is pulverized without firing. In either case, sieving is performed so that the particle size is within a predetermined range after pulverization. When scallop shell powder is used, either the fired powder or the unfired powder may be used, or the fired powder and the unfired powder may be mixed and used.

An example (when baking) of the manufacturing process of scallop shell powder is as follows. (When not firing, at least step 3 is omitted or steps 2 and 3 are omitted.)
-Step 1: After removing the inside by boiling the shell, the shell is left outdoors for several months and dried while being turned over occasionally. In this step, salt is removed.
Step 2: The dried shell is pulverized to a size that can be charged into a firing furnace (primary pulverization).
-Process 3: It bakes in the range of 470 degreeC-530 degreeC with a baking furnace. About 500 ° C is preferred.
Step 4: Crush with a crusher so as to obtain a crushed piece having a size of about 2 mm at the maximum (secondary pulverization).
-Process 5: It prepares so that it may become a predetermined particle size range by sieve selection. The predetermined particle size range will be described in Table 2 described later.
The scallop shell powder thus obtained is white and odorless.

The example of a mixing | blending of 2 types of exterior coating material compositions is as follows, for example.
・ Exterior primer composition:
Scallop shell powder 15% by mass
Normal cement 60% by mass
Pearlite 20% by mass
Acrylic resin 5% by mass
・ Exterior coating composition:
Scallop shell powder 40% by mass
White cement 25% by mass
Slaked lime 10% by mass
Pearlite 20% by mass
Acrylic resin 5% by mass

  Table 2 shows the test results showing the relationship between the particle size range and the characteristics of the scallop shell powder in the above-described formulation example of the exterior undercoat material composition. Preparation of scallop shell powder having a predetermined particle size range was performed by sieve selection. About the characteristic, water was added to the exterior primer composition, the exterior primer was prepared, and it evaluated by the workability | operativity at the time of apply | coating on a heat insulation board, and the state of the finished surface after curing.

  In the case of containing particles having a particle diameter exceeding 0.70 mm (samples (1) and (2)), the workability was poor, and the particles were exposed on the finished surface, and the roughness was conspicuous. In addition, when it contains particles with a particle size of less than 0.20 mm (samples (1), (2), (3), (4), (7), (8)), it tends to shrink and has a fine finish. Cracks occurred. As a result, the good particle size range with good workability and finished surface was 0.20 mm to 0.70 mm (samples (5) and (6)).

Further, an exterior primer material sample prepared by the formulation example of the above exterior primer composition containing scallop shell powder that has been sieved to a particle size range of 0.25 mm to 0.60 mm is used as a polystyrene foam insulation board (200 × 100 × 40 mm). ) Was subjected to a test for melting in frozen air (according to JIS A1435-1991 “Frost Resistance Test Method for Building Exterior Wall Materials”). Did not occur. Further, when a moisture permeability test (JIS A 1324 cup method) was performed on almost the same specimen, a moisture permeability coefficient of about 100 ng / (m ² · s · Pa) was obtained.

  Each test result about the above exterior undercoat material composition was substantially the same also about the exterior topcoat material composition by said compounding example.

  In addition, the Building Standard Act Construction Ordinance Article 108 No. 1 and No. 2 “Fireproof performance of outer wall (proof stress) for 30 minutes” for the overall structure shown in FIG. After evaluation, it passed this.

  FIG. 2 is an exploded perspective view schematically showing an example in which the exterior structure according to the present invention is applied to the outer wall of a reinforced concrete building. The same components as those in the example of FIG.

  The structural frame of the outer wall 11 of the reinforced concrete building is a concrete frame 1A4. A heat insulating board 1B3 is joined to the outdoor surface via an adhesive 1B4. An exterior component 1C is provided on the outdoor side of the heat insulation board 1B3. The exterior structure 1C is the same as the example in FIG.

  The configuration of the building outer wall shown in FIGS. 1 and 2 is an example, and the configuration of the exterior structure 1C on the indoor side is not limited to the illustrated example. For example, even when there is no heat insulation board 1B3, the exterior structure 1C can be constructed. In that case, the construction may be performed directly on the surface of the building frame on the outdoor side, or an appropriate exterior base may be provided for construction.

FIG. 3 is a diagram schematically showing a cross section of the exterior structure 1C of FIGS. 1 and 2 with the thickness exaggerated. The construction method of the exterior structure 1C is, for example, as follows.
Step 1: After applying the exterior undercoat material 1C1 to the heat insulating board 1B3 with a trowel thinner than a predetermined thickness (first time), the reinforcing material 1C2 is pasted while being pressed so as to be embedded in the exterior undercoat material 1C1. Then, the exterior undercoat 1C1 is applied again with a trowel (second time) to embed the reinforcing material 1C2, and the exterior undercoat 1C1 has a predetermined thickness. As another method, the reinforcing material 1C2 may be fixed to the heat insulating board 1B3 with an appropriate fastener, and the exterior undercoat material 1C1 may be applied from above the reinforcing material 1C2 to embed the reinforcing material 1C2.
Step 2: The exterior undercoat material 1C1 is cured and dried to some extent.
Step 3: The exterior topcoat material 1C3 is applied at a predetermined thickness with a trowel on the exterior undercoat material 1C1.
-Process 4: The exterior topcoat 1C3 is cured and dried.
-Process 5: Apply overcoat adjustment material 1C4 with a roller or spraying, and let it dry.
Step 6: Apply the overcoat material 1C5 with a roller or spray.
Step 7: Curing the overcoat material 1C5.

10, 11 Building outer wall 1A1 Pillar 1A2 Spacer 1A3 Structural plywood 1B1 Filling insulation 1B2 Breathable waterproof sheet 1B3 Thermal insulation board 1C Exterior component 1C1 Exterior undercoat 1C2 Reinforcement 1C3 Exterior overcoat 1C4 Overcoat adjustment material 1C5

Claims (9)

In the exterior structure (1C) that forms the exterior of the building,
A layer of exterior primer (1C1) applied to the indoor side;
A layer of the exterior topcoat material (1C3) applied to the surface on the outdoor side of the layer of the exterior undercoat material (1C1),
The exterior undercoat (1C1) is prepared by adding moisture to an exterior undercoat composition, and the exterior undercoat composition is 0.20 mm to 0.70 mm by pulverizing scallop shells. At least a scallop shell powder of 10 to 20% by mass screened to a particle size range, and a solidified material of 50 to 70% by mass, and
The exterior topcoat (1C3) is prepared by adding moisture to the exterior topcoat composition, and the exterior topcoat composition comprises 35 to 45% by mass of the scallop shell powder and 25 to 25% by weight. 45% by mass of a solidifying material.   2. The building exterior component according to claim 1, wherein the scallop shell powder is obtained by firing and baking the scallop shell at 470 ° C. to 530 ° C. 3.   The building exterior structure according to claim 1 or 2, further comprising a net-like reinforcing material (1C2) embedded in a layer of the exterior undercoat material (1C1).   The building exterior component according to any one of claims 1 to 3, further comprising a layer of an overcoat material (1C5) applied on an outdoor side of the layer of the exterior topcoat material (1C3).   The layer of the exterior undercoat (1C1) is applied to the surface on the outdoor side of the heat insulation board (1B3) installed outside the housing of the building. Building exterior structure. A layer of exterior undercoat (1C1) applied to the indoor side and a layer of exterior overcoat (1C3) applied to the outdoor side surface of the exterior undercoat (1C1) layer. An exterior undercoat material composition other than moisture constituting the exterior undercoat material in the exterior structure (1C) forming the exterior,
It contains at least 10 to 20% by mass of scallop shell powder crushed and sieved to a particle size range of 0.20 mm to 0.70 mm, and 50 to 70% by mass of solidified material. Exterior primer composition.   The exterior undercoat composition according to claim 6, wherein the scallop shell powder is obtained by firing and baking the scallop shell at 470 ° C to 530 ° C. A layer of exterior undercoat (1C1) applied to the indoor side and a layer of exterior overcoat (1C3) applied to the outdoor side surface of the exterior undercoat (1C1) layer. An exterior topcoat material composition other than moisture constituting the exterior topcoat material in the exterior structure (1C) forming the exterior,
It contains at least 35 to 45% by mass of scallop shell powder crushed and screened to a particle size range of 0.20 mm to 0.70 mm and a solidified material of 25 to 45% by mass. Exterior topcoat composition.   The exterior topcoat composition according to claim 8, wherein the scallop shell powder is obtained by firing and baking the scallop shell at 470 ° C to 530 ° C.

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