JP2000303394A - Composite hardened body and composite building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composite hardened body useful as a core material for a composite building material by molding and hardening a material in which an organic fibrous material is formulated in a specific inorganic amorphous body. SOLUTION: This composite hardened body 1 is constituted of a material comprising an organic fibrous material 3 composed of a polysaccharide, further a halogen and a crystal body which are formulated in an inorganic amorphous body 2 which is an oxide of at least two elements selected from the group consisting of Al, Si, Ca, Mg, P, S, K, Ti, Mn, Fe and Zn and has a composition of preferably 5-51 wt.% of Al2O3, 8-53 wt.% of SiO2 and 10-63 wt.% of CaO based on the total weight of the composite hardened body in which the total of the three oxides does not exceed 100 wt.% and, for example, is obtained by molding and hardening a paper making sludge being an industrial waste.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite cured product that can be used as various industrial materials and a composite building material using the same.

[0002]

2. Description of the Related Art Effective utilization of various industrial wastes has been studied in recent years from the viewpoint of protecting the global environment. For example, in the construction industry, which has consumed a large amount of forest resources until now, new construction materials are required for industrial waste,
In addition to suppressing the consumption of forest resources, the conventional inorganic boards, for example, calcium silicate board, perlite board, slag gypsum board, wood chip cement board, gypsum board, etc., realize low cost and high functionality. Suggestions have been made for it.

For example, Japanese Patent Application Laid-Open No. 7-41350 discloses that pulp residue (scum) generated after the production of paper is effectively used as a building panel. In this technique, an inorganic substance such as silica or alumina obtained by firing a scum is mixed with cement, fiber and water, and pressed against a porous iron plate. Also, Japanese Patent Laid-Open No. 10-21
No. 8643 discloses a cement admixture containing waste molten slag.

[0004]

However, Japanese Patent Application Laid-Open No.
In the technique of Japanese Patent No. 41350, there is a problem in that workability is poor because an iron plate and cement are used, and furthermore, the cement needs to be cured, thereby lowering productivity.

Further, the technique disclosed in Japanese Patent Application Laid-Open No. 10-218643 has a problem that it has excellent compressive strength but low flexural strength. It is necessary to increase the strength.

[0006] Furthermore, since any technique uses cement, nails or the like cannot be hit, and if forcedly hit, there is a disadvantage that cracks may be generated.

[0007] In view of the above, the present invention solves the above-mentioned problems and, when using industrial waste, provides a composite cured product having improved bending strength without impairing workability and productivity, and a composite cured product having the same. The purpose is to propose the composite building materials used.

[0008]

The gist of the present invention is as follows.
It is as follows. (1) Al, Si, Ca, Na, Mg, P, S, K, T
A composite cured product, characterized in that a fibrous material is mixed in an inorganic amorphous material containing at least two elements selected from i, Mn, Fe and Zn.

(2) A composite cured product characterized in that a fibrous substance is mixed in an inorganic amorphous substance containing at least Al, Si and Ca.

(3) It contains Al, Si and Ca, and additionally contains Na, Mg, P, S, K, Ti, Mn, Fe
And a fibrous material mixed in an inorganic amorphous material containing at least one element selected from Zn and Zn.

(4) In any one of the above (1) to (3), the inorganic amorphous material is Al ₂ O ₃ , Si
In terms of O ₂ and CaO, Al ₂ O ₃ : 5 to 51% by weight based on the total weight of the composite cured product, SiO ₂ : 8 to 53% by weight based on the total weight of the composite cured product, and CaO: composite A composite cured product having a composition containing 10 to 63% by weight based on the total weight of the cured product and a total of three types not exceeding 100% by weight.

(5) The composite cured product according to any one of the above (1) to (4), wherein the fibrous substance is an organic fibrous substance comprising a polysaccharide.

(6) The composite cured product according to any one of the above (1) to (5), further comprising a halogen.

(7) The composite cured product according to any one of the above (1) to (6), further comprising a crystal.

(8) The composite cured product according to any one of the above (1) to (7), wherein the fibrous material is oriented. Here, that the fibrous material is oriented means that the longitudinal direction of each fiber is aligned in a specific direction.

(9) A composite cured product obtained by curing papermaking sludge, which is industrial waste.

(10) A composite building material in which a reinforcing layer is formed on at least one surface of a core material, wherein the composite cured product according to any one of (1) to (9) is applied to the core material. A composite building material characterized by comprising:

(11) A composite building material having a decorative layer formed on at least one surface of a core material, wherein the composite cured product according to any one of the above (1) to (10) is applied to the core material. A composite building material characterized by comprising: 20

(13) A composite building material in which an electromagnetic wave shielding layer is formed on at least one surface of a core material, wherein the composite material according to any one of the above (1) to (11) is applied to the core material. A composite building material characterized by being applied.

(14) A composite building material in which water-resistant paper is adhered to at least one surface of a core material, wherein the composite cured product according to any one of (1) to (12) is applied to the core material. A composite building material characterized by comprising:

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of a composite cured product of the present invention
FIG. 1 schematically shows this. The composite cured body 1 is a mixture of the inorganic amorphous body 2 and the fibrous material 3. The inorganic amorphous material used in the present invention is not particularly limited.
i, Al, Ca, Na, Mg, P, S, K, Ti, M
It is sufficient that at least two elements selected from n, Fe and Zn are included, and inorganic amorphous bodies of various oxides can be used.

As used herein, the term "inorganic amorphous substance comprising two or more oxides" refers to oxide (1) -oxide (2).
An oxide (n) -based (where n is a natural number and oxide (1), oxide (2),... Oxide (n) are different oxides) inorganic amorphous body . Since this inorganic amorphous substance does not have a lattice unit, it is difficult to accurately analyze and define it, and it is impossible to express it by a chemical formula. This is considered to be an amorphous compound produced by the reaction.

Such an inorganic amorphous compound has a fluorescent X
Line analysis revealed that the elements (Al, Si, C
a, Na, Mg, P, S, K, Ti, Mn, Fe, Zn
Are selected, and a halo is observed in the range of 2θ: 15 ° to 40 ° in the analysis chart by X-ray diffraction. The halo is a gradual undulation of X-ray intensity, and is observed as a broad swell on the X-ray chart.

The composite cured product 1 is first made of an inorganic amorphous material 2
Becomes a strength-expressing substance, and since the fibrous material 3 is dispersed in the inorganic amorphous material 2 to improve the fracture toughness value, the bending strength value and the impact resistance can be improved. Further, the amorphous body has the advantage that not only a homogeneous cured body without strength anisotropy can be obtained, but also that a sufficient strength can be obtained at a low density because it is an inorganic amorphous body.

Although the reason why the inorganic amorphous material is a strength-expressing substance is not clear, it is presumed that crack propagation is inhibited as compared with a crystalline structure.
Further, since the fibrous material is more easily dispersed uniformly in the amorphous state than in the crystalline state, it is considered that the fracture toughness value is also improved.

Here, Si, Al, Ca, Na, Mg,
As the inorganic amorphous body containing at least two kinds of elements selected from P, S, K, Ti, Mn, Fe, and Zn, it is preferable to use these oxides. In particular, a non-inorganic crystalline material containing at least Al, Si and Ca, containing Al, Si and Ca, and additionally containing Na, Mg, P, S,
It is preferable that the inorganic amorphous material contains at least one element selected from K, Ti, Mn, Fe and Zn. Such oxides include Al ₂ O ₃ , SiO _{2
2, CaO, Na 2 O,} MgO, P 2 O 5, SO 3, K
It is desirable to use a system of two or more oxides selected from ₂ O, TiO ₂ , MnO, Fe ₂ O ₃ and ZnO. In particular, Al ₂ O ₃ —SiO ₂ —CaO system or A
An inorganic amorphous body composed of l ₂ O ₃ —SiO ₂ —CaO—oxide system or a composite of these inorganic amorphous bodies is most suitable. The oxide in the latter inorganic amorphous material is represented by A
It is at least one kind of metal and / or non-metal oxide except l ₂ O ₃ , SiO ₂ and CaO.

Firstly, inorganic amorphous body composed of Al ₂ O ₃ -SiO ₂ -CaO system, Al ₂ O _3, SiO ₂ and C
All or a part of each component of aO is a compound having an amorphous structure formed by solid solution or hydration reaction with each other. That is, Al ₂ O ₃ and SiO ₂ , SiO ₂ and C
aO, Al ₂ O ₃ and CaO, Al ₂ O ₃ , SiO
_It is considered to include any of the compounds formed by causing a solid solution or hydration reaction with a combination of ₂ and CaO. In such an inorganic amorphous compound, Al, Si, and Ca are confirmed by fluorescent X-ray analysis, and a halo is seen in the range of 2θ: 15 ° to 40 ° in an analysis chart by X-ray diffraction. The halo is a gradual undulation of X-ray intensity, and is observed as a broad swell on the X-ray chart.

Further, Al ₂ O ₃ , SiO ₂ and CaO
Other than at least one oxide, ie, Al
Inorganic amorphous bodies composed of ₂ O ₃ —SiO ₂ —CaO—oxide system include Al ₂ O ₃ and oxides, and SiO ₂ and oxides other than the above-mentioned combination of Al ₂ O ₃ —SiO ₂ —CaO systems. Substance, CaO and oxide, Al ₂ O ₃ , SiO ₂ and oxide, SiO ₂ , CaO and oxide, Al ₂ O ₃ , Ca
O and oxides, and Al ₂ O ₃ , SiO ₂ , CaO
And a compound formed by causing a solid solution or hydration reaction or the like with a combination of oxides and oxides.

It should be noted that the number of oxides is two or more, that is, Al
₂ O ₃ —SiO ₂ —CaO—Oxide (1)... Oxide (n) -based (n is a natural number of 2 or more) inorganic amorphous materials, these oxides, for example, oxides (1), oxide (2) ... oxide (n) (n is a natural number of 2 or more, and oxide (n) means different oxides if the value of n is different, and Al ₂ O ₃ , SiO ₂ , and CaO are excluded). A compound formed by performing a solid solution or hydration reaction with at least two or more combinations selected from the group consisting of Al ₂ O ₃ , SiO ₂ , and CaO. Compounds formed by causing a solid solution or hydration reaction in at least two or more selected combinations, oxides (1), oxides (2) ... oxides (n) (n is a natural number of 2 or more) ) And at least one selected from each of
It is considered to include any of the compounds formed by performing a solid solution or hydration reaction in combination with at least one selected from Al ₂ O ₃ , SiO ₂ and CaO.

Such an inorganic amorphous compound has a fluorescent X
According to the line analysis, in addition to Al, Si and Ca, the elements (Na, Mg, P, S, K, Ti, Mn, F
e, at least one selected from Zn) is confirmed.
In the analysis chart by the line diffraction, 2θ: 15 ° to 40 °
Halo can be seen in the range. The halo is a gradual undulation of X-ray intensity, and is observed as a broad swell on the X-ray chart.

Here, Al ₂ O ₃ , SiO ₂ and Ca
Oxides to be combined with O are one kind or two or more kinds, and are metals other than Al ₂ O ₃ , SiO ₂ and CaO and / or
Alternatively, non-metal oxides can be used, such as Na ₂ O, M
gO, P ₂ O ₅ , SO ₃ , K ₂ O, TiO ₂ , MnO,
It can be selected from Fe ₂ O ₃ and ZnO. This selection can be made based on the characteristics expected of the composite cured product.

For example, since Na ₂ O or K ₂ O can be removed with an alkali or the like, if the removal treatment is performed prior to the plating treatment, the surface to be plated on the surface of the composite hardened body becomes rough and acts as an anchor for plating. be able to. Mg
O forms a solid solution with Al ₂ O ₃ , SiO ₂ , and CaO to contribute to strength development, and greatly improves bending strength and impact resistance. P
₂ O ₅ is particularly advantageous when used for biomaterials (artificial roots, artificial bones) to aid adhesion with bone. SO ₃
Has a bactericidal action and is suitable for antibacterial building materials. TiO
₂ is a white colorant and also acts as a photo-oxidation catalyst, so it can forcibly oxidize attached organic pollutants and can be cleaned only by irradiating light. Has a unique effect that it can be used as a reaction catalyst. MnO is useful as a dark colorant, Fe ₂ O ₃ is useful as a light colorant, and ZnO is useful as a white colorant. In addition, these oxides
Each of them may be present alone in the inorganic amorphous material.

The composition of the inorganic amorphous material is Al
_In terms of ₂ O ₃ , SiO ₂ and CaO, Al ₂ O
₃ : 5 to 51% by weight, based on the total weight of the composite cured product, Si
O ₂ : contained in an amount of 8 to 53% by weight based on the total weight of the composite cured body and CaO: contained in an amount of 10 to 63% by weight based on the total weight of the composite cured body, and the total thereof does not exceed 100% by weight. Is preferred.

The reason is that the content of Al ₂ O ₃ is 5% by weight.
If the content is less than 50% or more than 51% by weight, the strength of the composite cured product will be reduced, and if the content of SiO ₂ is less than 8% by weight or more than 53% by weight, the strength of the composite cured product will be reduced. In addition, the content of CaO is less than 10% by weight or 6%.
Even when the amount exceeds 3% by weight, the strength of the composite cured product is still lowered.

Further, in terms of oxide, CaO / SiO
Adjusting the ratio of ₂ to 0.2 to 7.9 and the ratio of CaO / Al ₂ O ₃ to 0.2 to 12.5 is advantageous for obtaining a cured product having high strength.

Further, Al ₂ O ₃ , SiO ₂ and CaO
Oxides other than Na ₂ O, MgO, P ₂ O ₅ , S
O ₃ , K ₂ O, TiO ₂ , MnO, Fe ₂ O ₃ and Z
When one or more of nO is contained, the preferred content of each component is as follows. It goes without saying that the total amount of these oxides does not exceed 100% by weight. Na ₂ O: 0.1-2.4 wt% MgO with respect to the total weight of the composite hardened product: 0.3 to 22.0 wt% P ₂ O relative to the total weight of the composite hardened product _5: composite cured body 0.1 to 14.6% by weight based on the total weight of SO ₃ : 0.1 to 7.0% by weight based on the total weight of the composite cured body K ₂ O: 0 based on the total weight of the composite cured body .1～2.4 wt% TiO _2: from 0.1 to 17.4 wt% MnO, relative to the total weight of the composite hardened product: 0.1 to 3.0 wt% Fe with respect to the total weight of the composite cured body ₂ O ₃ : 0.2 to 35.6% by weight based on the total weight of the composite cured body ZnO: 0.1 to 3.6% by weight based on the total weight of the composite cured body The reason for limiting the range is that if the ratio is outside the above range, the strength of the composite cured body is reduced.

The composite cured product of the present invention has a specific gravity of 0.2 to
2.2 is desirable. When the specific gravity is in the range of 0.2 to 2.2, practical compressive strength and bending strength can be obtained, and this range can be said to be an advantageous range for obtaining strength. The specific gravity refers to the density of a substance when the density of water at 4 ° C. is set to 1, and the specific gravity is measured by measuring the volume and weight of the cured product, and (weight / volume) /0.9999973.
It is calculated by In particular, the specific gravity is 0.5
-1.8 is preferred, and 0.7-1.4 is optimal. This is because cracks during nailing can be specifically suppressed in this range. That is, if the specific gravity is less than 0.5, the pores are too large and the pores develop cracks, and conversely 1.8.
If the ratio exceeds 1, the effect of the inorganic amorphous material itself becomes too large, the reinforcing effect of the fibrous material is relatively reduced, the fracture toughness value is lowered, and cracks tend to occur. Therefore, 0.5-1.
Only when the specific gravity is adjusted to the range of 8, cracks can be suppressed.

It should be noted that the presence or absence of an amorphous structure can be confirmed by X-ray diffraction. That is, 2θ: 15 ° by X-ray diffraction
If a halo is observed in the region of ４０40 °, it can be confirmed that it has an amorphous structure. In the present invention, in addition to those having a completely amorphous structure, Hydrogen Aluminum Silicate, Kaolinite, Zeolit
e, Gehlenite, syn, Anorthite, Melitite, Gehlenit
e-synthetic, tobermorite, xonotlite, ettringite
Or SiO ₂ , Al ₂ O ₃ , CaO, Na ₂ O, Mg
O, P ₂ O ₅ , SO ₃ , K ₂ O, TiO ₂ , MnO, F
oxides such as e ₂ O ₃ and ZnO, and CaCO ₃
Crystals such as (Calcite) may be mixed.

Although it is not considered that these crystals themselves become a strength-expressing substance, if they have effects such as increasing the hardness and density to improve the compressive strength and suppressing the progress of cracks. Conceivable. The content of the crystal is desirably 0.1 to 50% by weight based on the total weight of the composite cured product. The reason for this is that if the number of crystals is too small, the above effects cannot be obtained, while if the number is too large, the strength is reduced.

Incidentally, the Al ₂ O ₃ —SiO ₂ based crystalline compound is selected from Hydrogen Aluminum Silicate and Kaolini.
te, Zeolite, Al ₂ O ₃ —CaO based crystalline compounds are Calcium Aluminate, CaO—SiO ₂ based crystalline compounds are Calcium Silicate, Al ₂ O ₃ —SiO ₂ —Ca
O-type crystalline compounds are Gehlenite, syn and Anorthite, and Al ₂ O ₃ —SiO ₂ —CaO—MgO-type crystalline compounds are Melitite and Gehlenite-synthetic.

Further, a crystal containing Ca is desired.
Best, Gehlenite, syn (Ca_Two Al_Two O₇ ), Meliti
te-synthetic (Ca_Two (Mg_0.5 Al_0.5 ) (Si_1.5 
Al _0.5 O₇ )), Gehlenite-synthetic (Ca_Two (M
g_0.25Al_0.75) (Si_1.25Al_0.75O₇ )), Anorth
ite, ordered (Ca_Two Al_Two Si_Two O₈ ) 、 Carbon carbonate
(Calcite) may be contained.

Further, in the composite cured product of the present invention, an inorganic amorphous material composed of at least two or more oxides contains
Halogen may be added. This halogen is a solid solution,
It acts as a catalyst for the hydrate formation reaction and acts as a combustion inhibitor. Its content is desirably 0.1 to 1.2% by weight. Because, when the content is less than 0.1% by weight, the strength is low,
If the content exceeds 1.2% by weight, harmful substances are generated by combustion. As the halogen, chlorine, bromine and fluorine are desirable.

Similarly, calcium carbonate (Calcite) may be added. Calcium carbonate itself is not a strength-expressing substance, but it is thought that by surrounding an inorganic amorphous body around calcium carbonate, it contributes to the improvement of strength by an action such as inhibiting the progress of cracks. The content of the calcium carbonate is desirably 48% by weight or less based on the total weight of the composite cured product. The reason for this is that if it exceeds 48% by weight, the bending strength is reduced. Also, 0.1
% By weight or more is desirable. If the content is less than 0.1% by weight, it does not contribute to the improvement in strength.

Further, the addition of a binder is advantageous for further improving the strength, water resistance, chemical resistance and fire resistance. The binder desirably comprises one or both of a thermosetting resin and an inorganic binder. As thermosetting resins, phenolic resins,
At least one resin selected from melamine resin, epoxy resin and urea resin is desirable. As the inorganic binder, at least one selected from the group consisting of sodium silicate, silica gel and alumina sol is desirable. Note that a thermosetting resin, for example, at least one thermosetting resin selected from a phenol resin, a melamine resin, an epoxy resin, a urea resin, and a urethane resin may be applied to the surface.

Next, in the present invention, in the inorganic amorphous material,
The fibrous material to be mixed can be either organic or inorganic
Is also good. Organic fibrous materials include vinylon and polypropylene
Synthetic fibers such as pyrene and polyethylene, and polysaccharides
At least one member selected from the group consisting of organic fibrous materials
Can be used, but is an organic fibrous material consisting of polysaccharides
It is desirable. Because polysaccharides have OH groups
And the hydrogen bond causes Al _Two O_Three , SiO_Two Or CaO
It is because it is easy to bond with various compounds of the above.

The polysaccharide is desirably at least one compound selected from amino sugars, uronic acids, starch, glycogen, inulin, lichenin, cellulose, chitin, chitosan, hemicellulose and pectin. Organic fibrous materials composed of these polysaccharides include:
Pulps, pulp residues, ground papers such as newspapers and magazines are advantageously suitable. The pulp contains about 10 to 30% by weight of lignin in addition to cellulose.

On the other hand, as the inorganic fibrous material, at least one selected from alumina whiskers, SiC whiskers, silica-alumina-based ceramic fibers, glass fibers, carbon fibers, and metal fibers can be used.

The content of the fibrous material is from 2 to 75.
% By weight. The reason for this is that if the content is less than 2% by weight, the strength of the composite cured product is reduced, while if it exceeds 75% by weight, the fire protection performance, water resistance, dimensional stability and the like may be reduced. Further, the average length of the fibrous material is desirably 10 to 3000 μm. If the average length is too short, no entanglement occurs, and if the average length is too long, voids are formed, and the strength of the inorganic cured product is likely to decrease.

It is recommended that the above-mentioned composite cured product is obtained by drying and coagulating and curing industrial waste, and particularly, the one obtained by drying and coagulating and curing papermaking sludge (scum). That is, the papermaking sludge is a pulp residue containing an inorganic substance, is low in cost because industrial waste is used as a raw material, and contributes to solving environmental problems. Moreover, the papermaking sludge itself has a function as a binder, and has an advantage that it can be formed into a desired shape by kneading with other industrial waste.

In the papermaking sludge, in addition to pulp, Al, Si, Ca, Na, Mg, P, S, K, T
selected from i, Mn, Fe and Zn oxides, hydroxides, carbonates or composite compounds thereof, or sols which are precursors of these oxides, or composites thereof, halogen and calcium carbonate At least one
It is common to include seeds, and water. In particular, waste paper of high quality paper contains a large amount of calcium-based crystals such as kaolin and calcium carbonate. Therefore, paper sludge containing a large amount of waste paper is suitable.

The water content of the papermaking sludge is from 20 to
Desirably, it is 80% by weight. This is because if the water content is less than 20% by weight, it becomes too hard and molding becomes difficult, while if it exceeds 80% by weight, it becomes a slurry and molding becomes difficult.

Here, as shown in FIG.
It is advantageous to mix the inorganic powder 4 therein to improve the fire resistance or to improve the strength by forming a strength-expressing substance by reacting with the inorganic amorphous material. By adjusting, the specific gravity of the composite cured body can also be adjusted.

Examples of the inorganic powder include calcium carbonate, calcium hydroxide, shirasu, shirasu balloon, perlite,
At least one selected from aluminum hydroxide, silica, alumina, talc, calcium carbonate, and industrial waste powder
Seeds can be used. In particular, as the industrial waste powder, it is desirable to use at least one type of industrial waste powder selected from calcined powder of papermaking sludge, grinding dust of glass, and crushed silica sand. This is because by using these industrial waste powders, cost reduction can be realized and furthermore, it can contribute to solving environmental problems.

The inorganic powder obtained by calcining papermaking sludge can be obtained by subjecting papermaking sludge to heat treatment at 300 to 1500 ° C. The inorganic powder thus obtained is
Since it is amorphous, has excellent strength and toughness, and has a low density, it can be reduced in weight by being dispersed in a composite cured product. In addition, when the papermaking sludge is fired at 300 ° C. or higher and lower than 800 ° C., or after being heat-treated at 300 to 1500 ° C., the inorganic powder obtained by quenching is advantageous because it surely contains an inorganic amorphous substance. The inorganic powder preferably has a specific surface area of 1.6 to 100 m ² / g. If it is less than 1.6 m ² / g, the contact area between the inorganic amorphous material and the inorganic powder becomes small, and the strength is reduced.
If it exceeds 00 m ² / g, effects such as crack development and improvement in hardness are reduced, and as a result, strength is reduced.

Further, it is desirable that the inorganic powder contains at least one inorganic substance selected from silica, alumina, iron oxide, calcium oxide, magnesium oxide, potassium oxide, sodium oxide and phosphorus pentoxide. . These are chemically stable, have excellent weather resistance, and have desirable characteristics as industrial materials such as building materials.

If the average particle size of the inorganic powder is too small or too large, sufficient strength cannot be obtained.
It is desirable to be in the range of 100 μm. The content of the inorganic powder is desirably 10 to 90% by weight. That is, if the amount of the inorganic powder is too large, the strength is reduced, and if the amount of the inorganic powder is too large, the strength is reduced, and in any case, the strength is reduced.

The composite cured product according to the present invention is used in various industries, and is used as a medical material for artificial limbs, artificial bones and artificial roots, including new building materials replacing calcium silicate plates, perlite boards, plywood, gypsum boards and the like. It can be used for electronic materials such as materials, core substrates of printed wiring boards, and interlayer resin insulation layers.

Therefore, a composite building material will be described below as one application example of the composite cured body. That is,
As shown in FIG. 3, in a composite building material in which a reinforcing layer 6 is formed on at least one surface of the core material 5 and on both surfaces in the illustrated example, the composite cured body 1 of the present invention is applied to the core material 5. It is characterized by the following. That is, by using the core material 5 as the composite cured body 1 of the present invention, even when a tensile force is applied to the core material, the core material itself has excellent bending strength, and furthermore, a reinforcing layer is formed on the surface of the core material. Is provided, so that it is not easily broken.
Further, even when pressure is locally applied to the surface, no dent or dent occurs.

Further, the composite building material according to the present invention is provided with a decorative layer such as a coating, a decorative panel and a decorative veneer on the reinforcing layer 6 upon its use. Scratches such as dents are less likely to occur, and the decorative surface is not distorted by the scratches and the design is not degraded.

The reinforcing layer 6 has a structure in which the fiber base material 6b is embedded in the resin 6a. It is particularly desirable to use a thermosetting resin for the resin 6a. That is, unlike a thermoplastic resin, a thermosetting resin has excellent fire resistance and does not soften even at a high temperature, so that the function as a reinforcing layer is not lost. As the thermosetting resin, a phenol resin, a memelamine resin, an epoxy resin, a polyimide resin, a urea resin and the like are suitable. In order to impart sufficient rigidity, impact resistance, and even higher fire resistance to the reinforcing layer, the content of the thermosetting resin in the reinforcing layer is desirably in the range of 10% by weight to 65% by weight.

On the other hand, it is desirable to use inorganic fibers for the fiber base 6b. This is because the strength of the reinforcing layer 6 can be improved and the coefficient of thermal expansion can be reduced. It is preferable to use glass fiber, rock wool, and ceramic fiber as the inorganic fiber because they are low in cost and have excellent heat resistance and strength. This fiber base material is a material obtained by molding a discontinuous fiber into a mat shape, or a material obtained by cutting continuous long fibers into a mat shape by cutting into 3 to 7 cm (a so-called chopped strand mat), and dispersing in water to form a sheet. A material obtained by piling up, a continuous long fiber spirally laminated to form a mat, or a continuous long fiber woven is applicable.

Further, the thickness of the reinforcing layer is from 0.2 mm to
It is desirable to be 3.5 mm. This is because, if it is set in this range, sufficient rigidity and impact resistance can be obtained, and high workability can be maintained. The reinforcing layer may contain a flame retardant such as aluminum hydroxide and magnesium hydroxide, and a commonly used inorganic binder such as silica sol, alumina sol, and water glass. Preferably, the reinforcing layer includes an elastic polymer. This is because even if the nail is hit, no crack is generated from the nail as a starting point, and the elastic polymer can secure the frictional force with the nail surface and improve the holding force of the nail.

As such a resin, a resin composition for imparting nail strength, which is composed of a thermosetting resin and an elastic polymer, is desirable. That is, the emulsion of the elastic polymer is dispersed in the uncured thermosetting resin liquid. By curing such a resin, the elastic polymer "islands" are dispersed in the "sea" of the thermosetting resin matrix, and the strength of the resin can be secured and the toughness can be imparted. . The elastic polymer is preferably a rubber-based latex, an acrylic-based latex, an acrylate-based latex, or a urethane-based latex. This is because these can be dispersed in a liquid state in an uncured thermosetting resin liquid. Because both thermosetting resin and elastic polymer are liquid,
Easy to impregnate porous and fibrous substrates.

The rubber-based latex includes nitrile-butadiene rubber (NBR) and styrene-butadiene rubber (S
BR) is good. The thermosetting resin is a phenolic resin,
Melamine resin, epoxy resin, polyimide resin and the like are preferable. It is preferable that the weight ratio of the solid content of the thermosetting resin to the elastic polymer is 95/5 to 65/35. The reason is that if the amount of the thermosetting resin is too large, the toughness decreases,
Cracks tend to occur and the holding power of the nail decreases. Conversely, if the amount of the elastic polymer is too large, the resin strength decreases and the holding power of the nail decreases. As described above, the holding force of the nail is such that the weight ratio of the solid content of the thermosetting resin and the elastic polymer is 95/5.
~ 65/35 is optimal.

In the present invention, the composite cured product may be used as a core material, and at least one surface thereof may have a decorative layer.
The decorative layer used is melamine resin paint, melamine resin impregnated paper, polyester resin paint, diallyl phthalate resin impregnated paper, UV curable resin paint, vinyl chloride resin film, urethane resin paint, polyacryl urethane, vinyl fluoride resin film, At least one selected from decorative boards
Types of resin-based decorative layer, natural wood veneer (rose, teak, pine, ash, oak, cedar), natural stone, artificial stone, carpet, vinyl chloride tile, cloth carpet, decorative plywood, tatami, etc. can be used. .

The decorative board has a three-layer decorative board composed of a phenol resin-impregnated core layer, a melamine resin-impregnated pattern layer, and a melamine resin-impregnated overlay layer, a melamine resin-impregnated backer layer, a phenol resin-impregnated core layer, and a melanin resin-impregnated pattern. A decorative board having a four-layer structure consisting of a layer and a melamine resin-impregnated overlay layer can be used. Especially in the case of a decorative board having a phenolic resin impregnated core layer as the core layer,
Since the surface strength is significantly increased, it can be applied to floor materials and the like. The thickness of this decorative layer is desirably 0.1 to 10 mm.

In the building material of the present invention, it is preferable that a reinforcing layer composed of a resin and a fiber base material is formed between the core material and the decorative layer. This is because impact resistance can be further improved, and application to flooring materials that require severe durability is also possible. The resin constituting this reinforcing layer is preferably a thermosetting resin. This is because, unlike a thermoplastic resin, a thermosetting resin has excellent fire resistance and does not soften even at a high temperature, so that the function as a reinforcing layer is not lost. Further, in order to improve the water resistance and strength, the composite cured product of the present invention may be provided as a composite building material by attaching water-resistant paper to at least one surface.

Hereinafter, the method for producing the composite cured product and the composite building material of the present invention will be described. First, a method for producing a composite cured product is as follows. That is, papermaking sludge is used as a raw material of the composite cured product. Papermaking sludge includes printing and information paper, kraft paper, titanium paper,
It is desirable to use papermaking sludge discharged when making tissue paper, dust paper, toilet paper, sanitary products, towel paper, industrial hybrid paper, and household hybrid paper. As the commercially available papermaking sludge, "cyclone ash", "raw sludge", etc., which are handled by Maruto Kiln Co., Ltd. can be used.

The papermaking sludge is poured into a desired formwork, or into a formwork provided with a filter, and then pressed to remove water, or a method of forming a papermaking sludge slurry. Perform molding. Then, after molding, drying and curing at a heating temperature of 20 to 160 ° C. yields a composite cured product. If the heating temperature is too high, deformation or cracks may occur, while if it is too low, a long time is required for drying and the productivity is reduced.

In particular, in order to form the composite cured product into a plate shape,
The papermaking sludge is conveyed by a conveyor and pressed by a roll to form a sheet-like molded body. The sheet-like molded body is pressed while being heated at a heating temperature of 80 to 160 ° C. to form a plate-like core material. The pressure at that time is 1 to 400 kgf / cm ²
Is appropriate. The specific gravity can be adjusted by appropriately changing the pressure. For example, the specific gravity is approximately 1.4 at 350 kg / cm ² . Note that the term “pressing” refers to maintaining the pressure applied. Then, the fibrous material is oriented in a direction crossing the pressing direction by the pressure applied at the time of pressing, so that the bending strength of the core material can be improved.
In addition, the pressurization removes moisture and suppresses the progress of crystallization, which is advantageous for forming an amorphous body.

As a method for adjusting the specific gravity, besides changing the pressure at the time of pressurizing, there is a method of adding an inorganic powder or a method of adding various foaming agents to form bubbles in the inorganic amorphous body. Further, the inorganic powder can be dispersed in the composite cured product by adding and mixing the inorganic powder to the papermaking sludge, followed by heating and curing.

In addition to the papermaking sludge, metal alkoxides and metal hydroxides can be used as raw materials. For example, a mixture of alkoxides or hydroxides of Al, Si, and Ca and a crushed product of used paper are mixed, and the mixture is hydrolyzed and polymerized in the presence of an acid or alkali to form a sol. You may make it gel. Such gels result in Al ₂ O ₃ , SiO ₂ , Ca
O, Na ₂ O, MgO, P ₂ O ₅ , SO ₃ , K ₂ O, T
It is presumed that they will be the same as compounds obtained by solid solution or hydration reaction of oxides such as iO ₂ , MnO, Fe ₂ O ₃ and ZnO.

By the way, various techniques using papermaking sludge can be found, but all of them have different technical contents from the present invention. That is, JP-A-49-86438 discloses that
A hot-pressed mixture of pulp scum (cellulose component) and lime scum is disclosed, but pulp scum means cellulose and uses the inorganic component in papermaking sludge as in the present invention. However, it is not a dispersion of fibers in inorganic amorphous. For this reason, fracture at the grain boundaries of limescale or crack propagation cannot be prevented, and problems remain in bending strength and compressive strength. Moreover, the limescale is
Crystalline substance (calcium oxide) burned from paper pulp
Which is clearly distinguished from the amorphous body of the present invention.

Further, Japanese Patent Application Laid-Open Nos. 7-47537 and 7-6
9701, 6-293546 and 5-270
No. 872 discloses a technique of combining cement and inorganic reinforcing fibers, and JP-A-10-15923 discloses a technique of mixing pulp sludge with crystalline gypsum.
Japanese Patent Application Laid-Open No. 9-2880 discloses a technique which focuses only on fibers in pulp waste, and Japanese Patent Application Laid-Open No. 53-81388 discloses a fiber in pulp waste (20% fiber, 0.01% earth and sand).
Each of the techniques described above is different from a technique in which a fibrous substance is dispersed in an inorganic amorphous material as in the present invention.

Further, Japanese Patent Application Laid-Open No. 51-30088 describes a technique for forming baked ash of pulp waste and a lightweight inorganic material, but does not describe calcination conditions and the like. Cannot be obtained. JP-A-8-2
No. 46400 discloses a technique in which waste paper pulp itself is used instead of papermaking sludge. JP-A-48-443
No. 49 discloses a technique in which a pulp waste containing an organic substance and an inorganic substance is mixed with a polymer emulsion or the like. The term "inorganic" refers to silicon oxide, aluminum oxide and iron oxide. And two or more metal oxides as in the present invention are different from those constituting a complex amorphous system. And, JP
JP-A-99524 discloses a ceramic (polycrystalline) base material, which is different from an amorphous base material as in the present invention.

The composite building material is manufactured as follows. First, the papermaking sludge is formed into a sheet by a conventionally known method such as circular net making, fourdrinier forming, dewatering press forming, extrusion forming, etc., and dried, or the paper making sludge is conveyed by a conveyor and pressed with a roll. Form into a sheet and dry. On the other hand, the fiber base material is impregnated with a resin,
And dried to obtain a reinforcing sheet. Next, the sheet-shaped molded body and the reinforcing sheet are laminated and pressed together while heating to form a composite building material including a core material (composite cured body) and a reinforcing layer. The heating temperature here is 80 to 200
It is suitable that the temperature and the pressure are about 1 to 400 kgf / cm ² .

[0077] By this pressing, the fibrous material can be oriented to increase the bending strength, and since water can be removed by applying pressure, it is possible to prevent water from being taken in and excessive crystallization.

Instead of the above method, the resin composition was impregnated into a mat of inorganic fibers, dried, and then heated and pressed.
A method may be used in which a thermosetting resin is cured and molded to form a reinforcing layer, and the reinforcing layer is attached to a core material that has been cured in advance with an adhesive.

Further, the surface of glass fiber, rock wool, or ceramic fiber is coated with a thermosetting resin such as a phenol resin in another configuration, and a fiber base made of these fibers is laminated on a sheet-like molded body. And hot pressing. This method of coating the fiber surface with a thermosetting resin in a separate step is advantageous because the adhesion to the impregnated resin is improved, the fibers are easily bonded to each other, and the resin impregnation rate can be further improved. .
Examples of such a coating method include a method in which the fiber base material is impregnated with an uncured thermosetting resin and dried, or a method in which a raw material melt of glass fiber, rock wool, and ceramic fiber flows out of a nozzle and is blown. Alternatively, there is a method in which fibers are formed by a centrifugal method, and a solution of a thermosetting resin such as a phenol resin is sprayed simultaneously with the formation of the fibers.

When glass fiber, rock wool, or ceramic fiber is used as the constituent material of the fiber base material, it is preferable to coat a silane coupling agent. The surface of the composite building material obtained in this way,
The back surface can be painted, or a decorative plate or a decorative veneer can be attached with an adhesive or the like. The coating is performed by printing and spraying various pigments, inks, and the like. The decorative board is a three-layer decorative board including a phenol resin-impregnated core layer, a melamine resin-impregnated pattern layer, and a melamine resin-impregnated overlay layer, a melamine resin-impregnated backer layer, a phenol resin-impregnated core layer, and a melamine resin-impregnated pattern layer. And a decorative plate having a four-layer structure composed of an overlay layer impregnated with a melamine resin. In particular, in the case of a decorative board having a phenolic resin-impregnated core layer as the core layer, the surface strength is significantly increased, so that it can be applied to flooring materials and the like. In addition, high quality wood such as cedar and cypress can be used as the decorative veneer. Furthermore, instead of forming a reinforcing layer, a thermosetting resin,
For example, phenol resin, melamine resin, epoxy resin,
At least one or more thermosetting resins selected from urea resins may be applied to the surface of the composite cured body.

[0081]

EXAMPLES (Example 1) Unfired papermaking sludge ("raw sludge" handled by Maruto Kiln Co., Ltd .: solid content 34% by weight, moisture 66)
1512 g). Next, while conveying the papermaking sludge by a conveyor, a pressure of 350 kgf / cm ² was applied to obtain a sheet-shaped molded product having a thickness of 10 mm. This sheet-like molded body was heated at 100 ° C. to obtain a plate-shaped composite cured body. When the thus obtained composite cured product was analyzed using a fluorescent X-ray analyzer (Rigaku RIX2100), it was found that the composition was as follows in terms of oxide. The pulp was calcined at 1100 ° C. and measured from the weight loss.

Pulp: 50.4% by weight, MgO: 1.4% by weight SiO ₂ : 25.2% by weight, SO ₃ : 0.5% by weight Al ₂ O ₃ : 14.0% by weight, P ₂ O _5: 0.2 wt% CaO: 8.0 wt%, Cl: 0.2% by weight TiO _2: 1.0 wt%, ZnO: 0.1 wt% Others traces specific gravity was 1.5.

Further, the side surface of the composite cured product was examined with an optical microscope (5
(0x), the fibers were oriented in a direction perpendicular to the pressing direction.

Example 2 Unsintered papermaking sludge ("raw sludge" handled by Maruto Kiln Co., Ltd., solid content 34% by weight, moisture 6)
(6% by weight) was prepared. Next, the papermaking sludge was conveyed by a conveyor, and a pressure of 3 kgf / cm ² was applied to form a sheet-shaped molded product having a thickness of 10 mm. This sheet-like molded body was heated at 100 ° C. to obtain a plate-shaped composite cured body. When the thus obtained composite cured product was analyzed using a fluorescent X-ray analyzer (RIX2100, manufactured by Rigaku), it was found that the composition was as follows in terms of oxide. The pulp was calcined at 1100 ° C. and measured from the weight loss. Pulp: 46.0 wt%, TiO _2: 1.0 wt% Al ₂ O _3: 14.0 wt%, SO _3: 1.0 wt% CaO: 8.0 _{wt%, P 2 O 5: 0} . 2% by weight Na ₂ O: 0.2% by weight, Cl: 0.3% by weight K ₂ O: 0.2% by weight, other: trace amount Fe ₂ O ₃ : 0.2% by weight, same as in Example 1 The measured specific gravity was 1.2.

Example 3 103 parts by weight of a fired papermaking sludge ("Cyclone Ash" handled by Maruto Kiln Co., Ltd.) and 1209 parts by weight of the unfired papermaking sludge of Example 1 were kneaded. The composition of the calcined sludge was analyzed using an X-ray fluorescence analyzer (RIX2100 manufactured by Rigaku) and converted into oxides as follows. (Burned material of paper sludge) SiO ₂ 34.1 wt% MgO 6.0 wt% Al ₂ O ₃ 20.7 wt% P ₂ O ₅ 2.7 wt% Fe ₂ O ₃ 12.4 wt% TiO ₂ 1 0.0% by weight CaO 21.3% by weight SO ₃ 0.5% by weight Cl 0.2% by weight ZnO 0.1% by weight Others Trace amount Average particle diameter 11.0 μm True specific gravity 2.756 Specific surface area 19.0 m ² / g The specific gravity measured in the same manner as in Example 1 was 0.8. Then, while conveying the kneaded material by a conveyor, 3 kgf / c
While applying a pressure of m ² , a sheet-like molded body having a thickness of 10 mm was obtained. This sheet-like molded body was heated at 110 ° C. to obtain a plate-shaped composite cured body.

Example 4 The same as Example 1, except that the pressure was 400 kgf / cm ² and the specific gravity was adjusted to 1.9.

Example 5 After a sheet-like glass fiber was impregnated with a phenol resin solution containing a curing agent (45% in terms of solid content in terms of impregnation amount), it was dried at a temperature of 80 ° C. for 20 minutes to obtain a reinforcing sheet. Obtained. Further, a phenol resin was applied to the front and back surfaces of the core material and dried at a temperature of 80 ° C. for 20 minutes. Next, a sheet-like molded body was formed in the same manner as in Example 2. Then, the reinforcing sheet is placed on the front and back surfaces of the sheet-shaped molded body, and at a temperature of 110 ° C., a pressure of 7 kgf /
pressed in cm ² 20 minutes to produce a composite building material comprising a core material reinforcing layer and thickness 10mm 1mm thick at both sides. Further, the composite building material has a thickness of 0.
A 2 mm decorative cedar veneer was attached via a vinyl acetate adhesive.

Example 6 1512 parts by weight of the unsintered papermaking sludge of Example 1 and 378 parts by weight of a phenol resin were kneaded to obtain a kneaded product. The resulting kneaded material was conveyed by a conveyor, and a pressure of 3 kgf / cm ² was applied to form a 10 mm-thick sheet-like molded product. This sheet-shaped molded body was heated at 110 ° C. to obtain a plate-shaped composite cured body. An 18 μm-thick copper foil was adhered to both surfaces of the composite cured product via a vinyl acetate adhesive to form an electromagnetic wave shielding layer.

(Example 7) 1200 parts by weight of the unsintered papermaking sludge of Example 1, 600 parts by weight of a phenolic resin and 600 parts by weight of a papermaking sludge fired product ("Cyclone Ash" handled by Maruto Kiln Co., Ltd.) A kneaded product was obtained. The kneaded product was formed into a sheet having a thickness of 10 mm while being pressed by a pressure of 3 kgf / cm ² while being conveyed by a conveyor.
This sheet-shaped molded body was heated at 110 ° C. to obtain a plate-shaped composite cured body. A phenolic resin was applied to both surfaces of the composite cured product, and water-resistant paper was stuck on both surfaces, and was cured by heating at 100 ° C. for 1 hour.

(Embodiment 8) Basically the same as in Embodiment 1, except that water is added to unfired papermaking sludge to obtain a solid content of 1%.
A slurry of 5% by weight was prepared, and 470 kg of this slurry was subjected to a dewatering press method at 130 kgf / cm ² (12.7MP).
A sheet-like molded body having a thickness of 10 mm was formed while applying the pressure of a). Next, this sheet-shaped molded body was heated at 100 ° C. to obtain a plate-shaped composite cured body. This specific gravity was 1.6.

(Example 9) Basically the same as Example 2, except that water was added to unfired papermaking sludge to obtain a solid content of 1%.
A slurry of 5% by weight was prepared, and 260 kg of this slurry was subjected to a dehydration press method at 85 kgf / cm ² (8.33 MPa).
While applying the pressure, a sheet-like molded body having a thickness of 10 mm was obtained. Next, this sheet-shaped molded body was heated at 100 ° C. to obtain a plate-shaped composite cured body. This specific gravity was 1.3.

(Comparative Example 1) 60 parts by weight of calcined scum, water 3
6 parts by weight, 100 parts by weight of cement and 0.3 parts by weight of vinylon fiber were mixed with a forced stirring mixer for 3 minutes to prepare a slurry.
After pressurizing at kgf / cm ² , the mold was released.

(Comparative Example 2) Lime-based sewage sludge molten slag (manufactured by Osaka City Sewerage Corporation and having the following main chemical components) was pulverized by a ball mill, and the fineness was 0.35 m in specific surface area.
95 parts by weight of ordinary Portland cement "Chichibu Onoda Co., Ltd." was mixed with 5 parts by weight of a pulverized mixture to give a ² / g (plain value of 3500 cm ² / g), and the SO ₃ content in the cement was 2% by weight. The mixture was adjusted with natural gypsum so as to obtain a mixed cement composition. The cement and sand were mixed at a ratio of 1: 3 and left for 3 days.

SiO ₂ : 33.4% by weight, MgO: 2.4% by weight Al ₂ O ₃ : 14.2% by weight, P ₂ O ₅ : 7.0% by weight Fe ₂ O ₃ : 5.0% by weight %, NaO: 0.7% by weight CaO: 33.9% by weight, K ₂ O: 0.7% by weight

The cured composites and composite building materials obtained in the above Examples and Comparative Examples were tested for flexural strength, compressive strength, workability, and nailability. Table 1 shows the results. The test method was such that the bending strength was JI
S A6901, and the compression strength is JIS A 541
The measurement was performed according to the method specified in No. 6. The workability was determined by cutting using a circular saw for woodworking. Furthermore, regarding nailing properties, the diameter was 4 m.
A nail having a length of 50 mm and a length of 50 mm was hit and checked for cracks.

[0096]

[Table 1]

The crystal structures of the composite cured products of Examples 1 and 3 were confirmed by X-ray diffraction. The X-ray diffraction charts are shown in FIGS. 4 and 5, respectively. For X-ray diffraction, use Rigaku MiniFlex,
Cu was targeted. A gentle undulation (halo) is observed in the range of 2θ = 15 ° to 30 °, and a peak indicating a crystal structure is also observed, which indicates that the crystal structure is mixed in the amorphous structure. From the peaks, calcium carbonate crystals (Calsite), Kaolinite, SiO ₂
Was identified. The content of calcium carbonate was 9.8% by weight based on the composite cured product in terms of a converted value.

[0098]

As described above, the composite cured product of the present invention is excellent in processability and productivity, has high bending strength, and is an inexpensive material because it uses industrial waste. Therefore, advantageous application in various fields is possible,
In particular, since it is possible to drive nails, it is possible to provide an optimum material for building materials at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a composite cured product of the present invention.

FIG. 2 is a schematic cross-sectional view of a composite cured product of the present invention.

FIG. 3 is a schematic sectional view of the composite building material of the present invention.

FIG. 4 is an X-ray diffraction chart.

FIG. 5 is an X-ray diffraction chart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Composite hardened body 2 Inorganic amorphous body 3 Fibrous material 4 Inorganic powder 5 Core material 6 Reinforcement layer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenji Sato 1- 1 north of Ibigawa-cho, Ibi-gun, Gifu Prefecture Inside the Ogaki-Kita Plant (72) Inventor Toshihiro Nomura 1- 1 north of Ibigawa-cho, Ibi-gun, Gifu F-term in the Ogaki Kita Plant (reference) BA10B BA10C BA10D BA10E BA13 DG01A DG10E DH00B DH00C GB07 HB00D JA11A JA12A JB07E JD08E JL01 JL02 JL16 JL16A YY00A 4L055 AA20 AF09 AG03 AG15 AG16 GA17 AG18 AG19 A20 GA79 AG37 A04 AGAH

Claims (13)

[Claims] 1. Al, Si, Ca, Na, Mg, P,
A composite cured product characterized in that a fibrous material is mixed in an inorganic amorphous material containing at least two elements selected from S, K, Ti, Mn, Fe and Zn. 2. A composite cured product comprising a fibrous material mixed in an inorganic amorphous material containing at least Al, Si and Ca. 3. An inorganic amorphous material containing Al, Si and Ca, and additionally containing at least one element selected from Na, Mg, P, S, K, Ti, Mn, Fe and Zn. And a fibrous material mixed therein. 4. The method according to claim 1, wherein
The inorganic amorphous material was converted to Al ₂ O ₃ , SiO ₂ and CaO, respectively, in an amount of 5 to 51% by weight based on the total weight of the Al ₂ O ₃ : composite cured body, and SiO ₂ : the total weight of the composite cured body. 8 to 53% by weight based on the weight and 10 to 63% by weight based on the total weight of the CaO: composite cured product, and the total of the three
A composite cured product having a composition containing not more than 0% by weight. 5. The method according to claim 1, wherein
A composite cured product, wherein the fibrous material is an organic fibrous material comprising a polysaccharide. 6. The method according to claim 1, wherein
A composite cured product further comprising a halogen. 7. The method according to claim 1, wherein
A composite cured product further comprising a crystal. 8. The method according to claim 1, wherein
A composite cured product characterized in that fibrous materials are oriented. 9. A composite cured product obtained by curing papermaking sludge as industrial waste. 10. A composite building material in which a reinforcing layer is formed on at least one surface of a core material, wherein the composite material according to any one of claims 1 to 9 is applied to the core material. A composite building material characterized by the following. 11. A composite building material in which a decorative layer is formed on at least one surface of a core material, wherein the composite material according to claim 1 is applied to the core material. A composite building material characterized by the following. 12. A composite building material having an electromagnetic wave shielding layer formed on at least one surface of a core material, wherein the core material comprises:
A composite building material obtained by applying the composite cured product according to any one of claims 1 to 11. 13. A composite building material in which water-resistant paper is adhered to at least one surface of a core material, wherein the composite material according to claim 1 is applied to the core material. A composite building material characterized by the following.