JP2000063161A - Filler inorganic hydraulic composition and board material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent bending strength and suppress the shrinkage of a product when carrying out the die forming by forming the shape of a filler composed of an expanded plastic into a flaky state. SOLUTION: This inorganic hydraulic composition is obtained by compounding 100 pts.wt. of an inorganic hydraulic material with 0.1-50 pts.wt. of at least flaky expanded plastics. Furthermore, the composition is compounded with 1-20 pts.wt. of an organic binder, 5-300 pts.wt. of an aggregate, 5-200 pts.wt. of an inorganic compound powdery or granular material releasing an incombustible gas at 100-1,000 deg.C, 1-150 pts.wt. of a hardening accelerator, 0.01-5 pts.wt. of an admixture and 0.01-10 pts.wt. of a fibrous material. An expanded polystyrene, an expanded urethane, etc., can be cited as the flaky expanded plastics and inorganic cements, ettringite, etc. can be cited as the inorganic hydraulic material. An acrylic acid emulsion, etc. can be cited as the organic binder. When converted into a product such as a building material, etc., the flaky expanded plastics are oriented in a layer state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inorganic hydraulic composition, a filler to be incorporated therein, and a plate material that can be used as a building material or the like.

[0002]

2. Description of the Related Art Products made of inorganic hydraulic materials such as cement have excellent compressive strength, but have low tensile strength and bending strength, and therefore various reinforcing materials have been used to improve these properties. For example, a structural material in which a fiber reinforcing material such as cellulose fiber or a plastic fiber is mixed with cement (Japanese Patent Laid-Open No. 8-169738), and a concrete in which a fibrous organic resin is mixed into the cement as a reinforcing material (Japanese Patent Laid-Open No. 10-1439). Gazette) is known. In addition, as a composite solid of expanded polystyrene / cement, a group of melted and solidified crushed expanded polystyrene bodies are bonded and fixed using cement paste consisting of cement / water as a medium, and a composite solid having the required molding shape. (Japanese Patent Laid-Open No. 5-194057).

[0003]

However, the fibrous reinforcing material must be blended in a large amount in order to improve the tensile strength and the bending strength, and it is difficult to mix, and the high heat insulating property, There is a problem that the weight cannot be reduced. Further, when a crushed product of expanded polystyrene is mixed, the weight of concrete can be reduced, but there is a problem that tensile strength and bending strength are not improved.

The present invention has been made to cope with such a problem, and it is an inorganic hydraulic composition capable of providing excellent bending strength and suppressing the shrinkage of the product at the time of molding, and its filling. It is an object to provide a material and a plate material obtained by molding an inorganic hydraulic composition.

[0005]

The filler of the present invention is a filler comprising a foamed plastic compounded in an inorganic hydraulic composition, wherein the shape of the foamed plastic compound is a flaky shape. And

The inorganic hydraulic composition of the present invention is an inorganic hydraulic material 1
It is characterized in that at least 0.1 to 50 parts by weight of flaky foamed plastic is mixed with 00 parts by weight.

Further, with respect to 100 parts by weight of the inorganic hydraulic material, 0.1 to 50 parts by weight of flaky foamed plastic, 1 to 20 parts by weight of organic binder, 5 to 300 parts by weight of aggregate, and 10 to 10 parts by weight.
Inorganic compound powder that emits nonflammable gas at 00 ℃ 5 to 200
Parts by weight, curing accelerator 1 to 150 parts by weight, admixture 0.01 to 5
By weight, 0.01 to 10 parts by weight of the fiber material are mixed.

The plate material of the present invention is a plate material formed by molding an inorganic hydraulic composition, wherein the inorganic hydraulic composition is the above-mentioned inorganic hydraulic composition.

In the filler of the present invention, the flaky foamed plastics are formed into a predetermined shape, so that when the filler is blended with the inorganic hydraulic composition, a product having excellent heat insulation and bending strength can be obtained. Further, since the inorganic hydraulic composition of the present invention contains flaky foamed plastics, when it is used as a product such as a building material, the flaky foamed plastics are oriented in a layered form, so that the bending strength is improved. . In addition, since the foam is compounded, a product that is lightweight and has excellent heat insulating performance, such as a plate material, can be obtained.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The inorganic hydraulic material according to the present invention can be used as long as it is an inorganic compound that is cured by reacting with water. For example, inorganic cements, ettringite, gypsum, etc. can be mentioned. Among these, inorganic cements, which are easy to obtain heat insulation, toughness, and durability, are preferable. Inorganic cements include hydraulic cements such as Portland cement, early-strength Portland cement, white Portland cement, alumina cement, and gypsum, latent hydraulic properties such as blast furnace cement and high sulfate slag cement, lime slag cement, and Keens cement. Examples thereof include cements, mixed cements such as silica cement, fly ash cement, lime silica cement, alkali silicate, oxychloride cement, and phosphate cement. Among these, hydraulic cements and latent hydraulic cements are preferable because the flaky foamed plastics can be easily mixed.

The flaky foamed plastics, which is a filler, is formed by adding a foaming agent to plastics and utilizing the gas generated during heating, or the gas generated during the reaction of the reactive plastics raw material is used. It is a thin piece of foamed plastics obtained by a foaming molding method. This foamed plastics is made of different types of plastics such as thermoplastic and thermosetting, foaming means such as decomposable foaming agent and evaporative foaming agent, molding methods such as injection foaming method and extrusion foaming method, foaming ratio 3 to 4 The expansion ratio such as low expansion of less than twice or high expansion of 10 to 70 times, cell structure such as independent or open cells, and the like can be variously selected depending on the type and application of the hydraulic hardening material of the present invention. The closed cell structure is preferred when heat insulation is required, for example, for exterior wall construction.

In the present invention, expanded polystyrene, expanded urethane, expanded polyolefin such as expanded polyethylene and expanded polypropylene are suitable for improving bending strength and reducing weight.

The above-mentioned foamed plastics is processed into a flaky shape. As a processing method, a method of cutting a thin sheet,
Any method may be used, such as a method of molding using a mold or a method of slicing a plate-shaped body or a lump body from the surface. In the present invention, a method of slicing a plate or a lump from the surface is particularly preferable. As the plate-shaped body or the lump-shaped body, a foamed plastic body that is disposed of as industrial waste can be used. If it is a method of slicing, each flaky shape does not have the same shape, and since individual flaky plastics have a thick portion and a thin portion mixed,
When blended in a slurry of an inorganic hydraulic material, it becomes easy to uniformly disperse. In addition, after blending, the flaky plastics are easily oriented in layers when they are poured into a molding die due to a restoring force centering on a thick portion. As a result, the bending strength of products such as building materials obtained using the inorganic hydraulic composition of the present invention is improved.

The specific shape of the flaky plastic is a flaky shape in which the thickness, width and length are not all the same, and the thickness is 0.1 to 15 mm, the width is 1 to 300 mm, and the length is 1 to 300.
Those within the range of mm are preferable. Further, it may have a shape in which the tip direction changes into a wedge shape when the thickness section is viewed from the thick portion to the thin portion. Further, it may be in the form of flakes having substantially the same thickness. Such a shape can be obtained by slicing a plate-shaped body or a lump of foamed plastics with a slicer or the like.

The blending ratio is at least 0.1 to 50 parts by weight of flaky foamed plastics per 100 parts by weight of the inorganic hydraulic material.
Parts by weight, preferably 1 to 30 parts by weight. Within this range, the bending strength of the product is improved. Further, since the filler is flaky foamed plastic, it is possible to suppress the shrinkage of the inorganic hydraulic material.

The organic binder according to the present invention is taken into the inorganic hydraulic material together with the hydration reaction of the inorganic hydraulic material such as inorganic cement, and imparts water resistance and durability. For example, an acrylic resin emulsion such as a pure acrylic emulsion obtained by copolymerizing an acrylic ester or a methacrylic ester or a styrene acrylic emulsion into which styrene is introduced, a vinyl acetate resin emulsion, a vinyl acetate / Veova copolymer resin emulsion, styrene- Examples thereof include a butadiene resin emulsion. The aqueous emulsion may contain a protective colloid, a surfactant, a pigment, a pigment wetting agent, a viscosity modifier, a freeze-thaw stabilizer, an antifoaming agent, an antifungal agent and the like.

The aggregate according to the present invention can be used as long as it can maintain the hydration reaction of the inorganic hydraulic material and maintain the strength. Examples thereof include fly ash, river sand, silica sand, crushed stone gravel, expanded calcium carbonate, obsidian perlite, pearlite perlite, calcined vermiculite, and shirasu balloon.

The inorganic compound powder or granules releasing a nonflammable gas at 100 to 1000 ° C according to the present invention means an inorganic compound releasing a nonflammable gas such as steam gas or carbon dioxide gas in a temperature range of 100 to 1000 ° C. . In particular, an inorganic compound capable of releasing 10% or more by weight as a nonflammable gas is preferable. Specifically, aluminum hydroxide that produces steam gas at 200 ° C to 250 ° C, calcium carbonate that produces carbon dioxide gas at approximately 800 ° C, bentonite and sepiolite that produces vapor gas at approximately 900 ° C, and steam at approximately 150 ° C. Baking soda which produces gas and carbon dioxide, magnesium hydroxide which produces steam gas at about 400 ° C., and the like can be exemplified. These can be used alone or as a mixture.

The hardening accelerator according to the present invention can be used as long as it accelerates the hydration reaction of the inorganic hydraulic material, and examples thereof include water glass, calcium salt, tin chloride, etc. which give quick setting and rapid hardening. be able to.

The admixture according to the present invention refers to a water retention agent, a viscosity modifier, etc. for improving the workability of construction, such as methyl cellulose and AE agent.

The fiber material according to the present invention contributes to improving the bending strength of the product and prevents cracks, and conventionally known fiber materials can be used. Examples thereof include alkali resistant glass fibers, ceramic fibers, polyester fibers, aromatic polyamide fibers such as Nomex and Kevlar.

The blending ratio is 0.1 to 50 parts by weight, preferably 1 to 30 parts by weight, and 1 to 20 parts by weight, preferably 5 to 10 parts by weight of an organic binder based on 100 parts by weight of the inorganic hydraulic material. Parts by weight, aggregate 5 to 300 parts by weight,
Preferably 50 to 150 parts by weight, 5 to 200 parts by weight, preferably 30 to 100 parts by weight, inorganic compound powder or granules that release a nonflammable gas at 100 to 1000 ° C., 1 to 150 parts by weight, preferably 10 parts by weight. ~ 100 parts by weight, admixture 0.01 to 5 parts by weight,
Fiber material 0.01 to 10 parts by weight. Within this range,
The bending strength of the product is improved. Further, since it is a flaky foamed plastic, it is possible to suppress the shrinkage of the inorganic hydraulic material. Further, heat resistance and water resistance are improved.

A method for producing a cement board used for a building material or the like by using the inorganic hydraulic composition of the present invention is, for example, a method in which a slurry of cement and flaky foamed plastics is put in a mold and a predetermined press is applied. It can be manufactured by applying pressure. The slurry preferably has a concentration capable of forming a plate material and has a relatively low viscosity.
When such a slurry is poured into a mold, the flaky foamed plastics are oriented in layers in the process. The viscosity of the slurry is preferably 180 or more in terms of flow value. Further, the mold may have a pattern on the surface or may be plain.

A cross section of the obtained plate material is shown in FIG. Plate material 1
Inside the cement material 2 is flaky foamed plastics 3
Are dispersed, and the flaky foamed plastics 3 are oriented in layers. Therefore, no shrinkage is observed during molding, bending strength is improved, and a lightweight product having excellent heat insulation and surface elasticity can be obtained. As shown in Fig. 1, the reason for the excellent heat insulation is as follows.
It is considered that the heat transfer path 4 becomes longer due to the flaky foamed plastics 3. On the other hand, in the case of a plate material containing a conventional powder or granular material, as shown in FIG. 2, the heat transfer path 4 is not obstructed by the powder or granular material 5 and becomes the shortest distance of the inorganic substance having excellent thermal conductivity. Therefore, the heat insulating property is inferior to the product obtained from the inorganic hydraulic composition of the present invention. The inorganic hydraulic composition of the present invention and the plate material obtained therefrom can be suitably used for building materials in general, building interior and exterior materials, artificial wood, and roofing materials.

[0025]

[Examples] Examples 1 to 21 Polystyrene foam (expansion ratio 30 times) was used to obtain an average thickness of about 1
It was sliced into mm to obtain a filler made of flaky foamed plastics having the length and width shown in Table 1. To 100 parts by weight of Portland cement, 5 parts by weight of the above filler and 60 parts by weight of water were mixed to form a mixed slurry, which was poured into a formwork and hardened while pressing the surface to a thickness of 13 mm.
The board material was obtained. When observing the cross section of the obtained plate material,
Flaky foamed plastics are oriented in layers in the thickness direction,
The surface of the plate material had elasticity. In addition, no shrinkage was observed during molding. The bending strength of the obtained plate material is JIS
It measured according to R5201. The results are shown in Fig. 3. The curve numbers in FIG. 3 are the graph numbers shown in Table 1. For example, Example 15 (graph number: 4, length: 5
(mm) plate material had a bending strength of 35 kgf / cm ² . The heat conductivity of the plate material of Example 15 was measured according to JIS A 1420, and it was 0.045 kcal / m ² · h ·
It was excellent at ℃ and heat insulation.

Comparative Examples 1 to 4 A polystyrene foam (expansion ratio: 30 times) was molded into a substantially cubic body having a side length shown in Table 2 to obtain a filler. The thickness was the same as in Example 1 except that this filler was used.
A plate material of 3 mm was obtained. The bending strength of the obtained plate material is JIS
It measured according to R5201. The results are shown in Fig. 3. The bending strength of the plate material of Comparative Example 2 was 25 kgf / cm ² . Also,
When the thermal conductivity was measured by the same method as in Example 15,
It was 0.062 kcal / m ² · h · ° C.

[0027]

[Table 1]

[Table 2]

The plate materials of Examples 1 to 21 were excellent in bending strength. In addition, the flaky foamed plastics having a larger length and width with respect to the thickness showed more excellent bending strength.

Example 22 Example 15 was added to 100 parts by weight of Portland cement.
5 parts by weight of the flaky foamed plastics used in, 20 parts by weight of acrylic emulsion (20% by weight), 50 parts by weight of fly ash, 30 parts by weight of aluminum hydroxide powder, 15 parts by weight of water glass, methyl cellulose admixture 0.1
By weight, 0.1 part by weight of alkali-resistant glass fiber was mixed and mixed, and then cured to obtain a plate material having a thickness of 13 mm. The cross section of the obtained plate material had the flaky foamed plastics oriented in a layered form, and when the bending strength of the plate material was measured by the same method as in Example 1, it was 40 kgf / cm ² .

Comparative Example 5 Example 22 except that the polystyrene foam powder used in Comparative Example 2 was used in place of the flaky foamed plastics.
A plate material having a thickness of 13 mm was obtained under the same condition method as described above. Example 1
The bending strength of the plate was measured by the same method as
It was gf / cm ² .

[0031]

Since the filler of the present invention is flaky foamed plastics, it is oriented in layers in the slurry of the inorganic hydraulic composition. As a result, a product having excellent heat insulating properties and bending strength as a plate material can be obtained.

Since the inorganic hydraulic composition of the present invention contains flaky foamed plastics, it has improved flexural strength, excellent heat insulation and surface elasticity, such as lightweight construction board materials. Is obtained.

In addition to the above-mentioned characteristics, a product such as a building board material having excellent heat resistance and durability can be obtained because the organic binder, the aggregate and the like are blended together with the flaky foamed plastics.

Since the plate material of the present invention is formed by molding the above-mentioned inorganic hydraulic composition, the flaky foamed plastics are oriented in the thickness direction in a layered manner in the inorganic hydraulic composition. as a result,
A plate material having excellent bending strength and heat insulation can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a plate material obtained by using an inorganic hydraulic composition of the present invention.

FIG. 2 is a cross-sectional view of a plate material containing a conventional powder and granules.

FIG. 3 is a view showing a result of measuring bending strength of a plate material.

[Explanation of symbols]

1 plate material 2 cement materials 3 Flaky foamed plastics 4 Heat transfer path 5 Granules

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Claims (4)

[Claims] 1. A filler made of foamed plastics to be mixed with an inorganic hydraulic composition, wherein the shape of the foamed plastics is flaky. 2. An inorganic hydraulic composition, characterized in that at least 0.1 to 50 parts by weight of flaky foamed plastic is mixed with 100 parts by weight of the inorganic hydraulic material. 3. 100 to 100 parts by weight of inorganic hydraulic material, 0.1 to 50 parts by weight of flaky foamed plastic, 1 to 20 parts by weight of organic binder, 5 to 300 parts by weight of aggregate, and 100 to 1000 ° C.
5 to 200 parts by weight of an inorganic compound powder that emits a non-combustible gas, a curing accelerator of 1 to 150 parts by weight, an admixture of 0.01 to 5 parts by weight, and a fiber material of 0.01 to 10 parts by weight. Inorganic hydraulic composition. 4. A plate material formed by molding an inorganic hydraulic composition, wherein the inorganic hydraulic composition is the inorganic hydraulic composition according to claim 2 or 3.