JPH1036161A - Hydraulic composition and its hardened product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composition capable of providing a hardened product, having a low specific gravity and a high strength and excellent in water resistance by including specific four components therein. SOLUTION: This hydraulic composition is obtained by including (A) a granulated blast furnace slag which is a fine powdery substance having latent hydraulic properties and 2,000-15,000cm<2> /g specific surface area, (B) an ultrafine powdery substance having a smaller average particle diameter than that of the component A by one order or more and <=1μm average particle diameter such as a silica fume or a fly ash in an amount of 3-30 pts.wt. in 100 pts.wt. total amount of the components A and B, (C) a water-soluble substance, used for accomplishing an improvement in operating efficiency, moldability and physical properties and having effects on an improvement in especially the fluidity such as sodium polyacrylate in a low-molecular weight water- soluble polymer in an amount of 0.1-10 pts.wt. based on 100 pts.wt. total amount of the components A and B and a water-soluble substance such as hydroxypropyl methyl cellulose in a water-soluble polymer having thickening effects in an amount of 0.5-15 pts.wt. based on 100 pts.wt. total amount of the components A and B and (D) an aggregate having <=1 specific gravity and >=300kgf/cm<2> compressive strength therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an exterior material, an interior material,
The present invention relates to a hydraulic composition useful for architectural and civil engineering materials such as roofing materials, partitioning materials, and formwork materials, and a cured product thereof.

[0002]

2. Description of the Related Art In recent years, high-strength inorganic materials using high-strength cement having high bending strength or granulated blast-furnace slag have been developed as building materials. However, although these materials have high strength, they generally have a large specific gravity and are hard, and are brittle, so that they become heavy when used as architectural / civil engineering materials, and have problems in workability and workability. In order to solve this problem, the cured product is made to have a hollow structure, and in terms of composition, various lightweight aggregates are added to reduce the weight, but no satisfactory results have been obtained.

[0003] For example, the weight reduction by making the cured product into a hollow structure is limited to the case where the molding method is extrusion molding, and the hollow ratio is limited in consideration of the shape retention of the molded body from extrusion molding to curing. However, there is a limit to the hollow ratio in terms of reduction in the strength of the material. In terms of composition, the material obtained by adding a lightweight aggregate such as pearlite should significantly reduce the strength and physical properties when immersed in water, etc., and the lightweight aggregate will be crushed during kneading to achieve the expected weight reduction. There are still problems such as difficulties.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a composition having a low specific gravity, high strength, and a cured product having excellent water resistance.

[0005]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, completed the present invention. That is, the present invention

(1) Hydraulic composition containing granulated blast furnace slag, ultrafine powdery substance, water-soluble substance, aggregate having specific gravity of 1 or less and compressive strength of 300 kgf / cm ² or more, (2) water-soluble composition (3) the hydraulic composition according to the above (1), wherein the hydrophilic substance is a water-soluble polymer; and (3) the hydraulic composition according to the above (1) or (2), wherein the aggregate is a ceramic filler of hollow microspheres. ,
(4) The hydraulic composition according to any one of the above (1) to (3) containing an organic fiber, (5) any of the above (1) to (4) containing an alkali stimulant and water. Or (6) a cured product obtained by mixing the hydraulic composition according to (5), molding as necessary, and curing after curing, (7) water according to (5). The present invention relates to a cured product obtained by mixing and molding a hardening composition and then curing and curing, and (8) the cured product according to (7), wherein the molding method is extrusion molding.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The granulated blast furnace slag used in the present invention is a finely powdered substance having latent hydraulic properties, and its specific surface area is usually 2,
000 to 15,000 cm ² / g, preferably 3,000
0 cm ² / g or more, more preferably 4,000 cm ² /
g or more are used.

[0008] As the ultrafine powdery substance used in the present invention, those having an average particle size smaller than the average particle size of the granulated blast furnace slag by at least one order, preferably at least two orders of magnitude are suitable. Is usually 1 μm or less,
Preferably, those having a thickness of 0.05 to 0.5 μm are used. Specific examples of ultrafine powdery substances that can be used include silica fume, fly ash, silica powder, clay, kaolin, metakaolin, talc, calcium carbonate, crushed ceramics, titania, alumina, zirconia, aerosil, and the like. However, in consideration of the viscosity characteristics of the hydraulic composition after kneading and the mechanical properties of the finally obtained cured product, silica fume is preferred. The amount of the ultrafine powdered substance varies depending on the specific surface area of the granulated blast furnace slag and the type and amount of aggregate, but the total amount of the granulated blast furnace slag and the ultrafine powdered substance is 1
Usually 3 to 30 parts by weight, preferably 5 to 5 parts by weight
An amount occupying 20 parts by weight, more preferably 7 to 15 parts by weight, is used.

The water-soluble substance contained in the hydraulic composition of the present invention is used for improving workability, moldability, and physical properties of the composition of the present invention. It is a substance that contributes to thickening effect, strength increasing effect, dispersibility (uniformity) improving effect, water reducing effect, flowability improvement and the like. The expression of these effects by a water-soluble substance is most affected by its molecular structure, but not only by the molecular weight of the water-soluble substance but also by the high and low molecular weight of the water-soluble substance. Although these compounds improve the dispersibility and exhibit a water reducing effect, those having a high molecular weight exhibit a thickening effect of increasing the viscosity of the composition more than those effects. In the present invention, the performance of these water-soluble substances is selectively used. That is, when the composition of the present invention is used in a form such as casting or forming a coating film, the dispersibility improving effect and the water reducing effect are particularly important, and the flowability improving effect is particularly important. Use toxic substances.

As a water-soluble substance having a dispersibility-improving effect, a water-reducing effect, and a fluidity-improving effect (referred to as a water-soluble substance (A)), for example, a relatively low-molecular-weight compound having a carboxylic acid group or a salt thereof in the molecule. Water-soluble polymers include, for example, poly (meth) acrylic acid, (meth) acrylic acid / maleic anhydride copolymer, (meth) acrylic acid / maleic acid / vinyl ether copolymer, (meth) ) Acrylic acid
Itaconic acid-styrene copolymer, maleic acid-C ₅ anhydrous
-C ₈ olefin copolymer, and it may be mentioned salts of these polymers. Here, (meth) acrylic acid refers to acrylic acid or methacrylic acid. Examples of C ₅ -C ₈ olefins in the above-methylbutene, pentene, hexene, cyclopentene, can be mentioned cyclohexene. In the above description, examples of the salt include alkali metal salts such as lithium, sodium, and potassium, and ammonium salts can also be used.
Further, a copolymer of a monomer copolymerizable with (meth) acrylic acid, maleic anhydride, itaconic acid, styrene, vinyl ether, or the like may be used. Examples of copolymerizable monomers include hydroxyethyl (meth) acrylate, N-
Vinyl pyrrolidone, sodium styrene sulfonate, sodium (meth) allyl sulfonate, vinyl acetate, (meth)
Methyl acrylate, ethyl (meth) acrylate, butyl (meth) acrylate), acrylonitrile, (meth)
Acrylamide, ethylene, propylene, isobutylene, and the like are included. Of these water-soluble polymers, sodium polyacrylate is preferred.

[0011] The molecular weight of these water-soluble polymers cannot be generally determined due to their molecular structures, but is usually 1,000 to 20.
000, preferably 3,000 to 100,000. Further, taking sodium polyacrylate which is particularly preferred in the present invention as an example, its molecular weight is usually 1,000
0 to 100,000, preferably 5,000 to 50,000
00 is used. Further, the water-soluble substance (A) is not limited to the above-mentioned water-soluble polymers, and is known as a water reducing agent for cement and concrete, for example, a salt of a formalin condensate of naphthalenesulfonic acid, Lignin sulfonic acid salts, melamine sulfonic acid salts, and the like can be used, and these can be used in combination with the above-mentioned water-soluble substances. When used in combination, the proportion of these water reducing agents in the total water-soluble substance is preferably 50% by weight or less. The amount of the water-soluble substance (A) used is usually 0.1 to 10 parts by weight, preferably 0.3 to 5 parts by weight, based on 100 parts by weight of the total amount of the granulated blast furnace slag and the ultrafine powdery substance. More preferably, it is 0.5 to 3 parts by weight.

When the composition of the present invention is formed by extrusion molding or press molding, etc., the water-soluble substance is required to have a thickening effect and a strength increasing effect. An effective water-soluble substance (referred to as water-soluble substance (B)) is used. As the water-soluble substance (B), a water-soluble polymer having a relatively high molecular weight is used, and specific examples thereof include celluloses such as hydroxypropylmethylcellulose, hydroxyethylcellulose and carboxymethylcellulose among the water-soluble polymers shown above. Derivative, polyacrylic acid, polymethacrylic acid, alkali metal salt of polyacrylic acid or polymethacrylic acid, copolymer of acrylamide with acrylic acid or metal salt of methacrylic acid, polyacrylamide, copolymerization of acrylic acid and maleic acid Examples include, but are not limited to, unified metal salts.

Among these water-soluble polymers, polyacrylic acid salts such as sodium polyacrylate, sodium polymethacrylate, potassium polyacrylate, potassium polymethacrylate, lithium polyacrylate, lithium polymethacrylate, and polymethacrylic acid. Acid salts, cellulose derivatives such as carboxymethylcellulose and hydroxypropylmethylcellulose are preferable, and sodium polyacrylate having a large thickening effect and a large strength increasing effect is particularly preferable. These water-soluble polymers are not only used alone, but also
More than one species may be used in combination. Although the molecular weight of these water-soluble polymers is not particularly limited, for example, when sodium polyacrylate is taken as an example, the molecular weight is usually 1
A material of not less than 00,000, preferably not less than 500,000 is used. The molecular weight distribution may be a single molecular weight distribution, or may have a wide distribution from low molecular weight to high molecular weight.

These water-soluble substances (B) are preferably kneaded uniformly into the hydraulic composition when the hydraulic composition is kneaded, and may be finely pulverized powder, beads or as required. It is preferable to use an aqueous solution. The amount of the water-soluble substance (B) varies depending on the properties required for the cured product of the present invention. 15 parts by weight, preferably 1.0 to 10 parts by weight,
More preferably, it is 1.5 to 5 parts by weight. Hereinafter, the water-soluble substances (A) and (B) are collectively referred to as a water-soluble substance.

The specific gravity used in the present invention is 1 or less and the compressive strength is 3
Aggregate of not less than 00 kgf / cm ² is not particularly limited as long as it has such specific gravity and compressive strength, but an aggregate having low water absorption is preferable. The specific gravity is preferably 0.5 or less, and the compressive strength is preferably 500 to 1500 kgf / cm ² . The compressive strength of the aggregate can be measured, for example, by placing a sample of known volume in a sealed container, pouring mercury into the container, sealing the container, gradually applying pressure from above the container to break the aggregate, It can be measured from the relationship between pressure reduction and pressure.
Specific examples of the aggregate having such specific gravity and compressive strength include silica-alumina microballoons and fly ash balloons; for example, a coal floater manufactured by Shinseikenken Co., Ltd., a ceramic balloon made of hard ceramic, and hollow microspheres. Ceramic fillers such as Microcells (trade name, manufactured by Chichibu Onoda Co., Ltd.), glass microballoons, and the like; fly ash balloons, hollow microsphere ceramic fillers are preferable, and hollow microsphere ceramic fillers are particularly preferable. These aggregates can be used alone or in combination of two or more.

The particle size of the aggregate is not particularly limited, but usually the average particle size is 5 mm or less, preferably 1 mm or less, more preferably 500 μm or less. The particle size distribution of the aggregate may be narrow or wide. The amount of the aggregate is usually 5 to 200 parts by weight, preferably 5 to 100 parts by weight, more preferably 10 to 50 parts by weight, based on 100 parts by weight of the total amount of the granulated blast furnace slag and the ultrafine powdery substance. It is. If the amount of the aggregate is too small, the effect of reducing the weight is reduced, and if it is too large, the kneadability, moldability and physical properties of the cured product of the hydraulic composition are reduced.

The hydraulic composition of the present invention contains organic fibers as necessary. Specific examples of organic fibers that can be used include virgin pulp, recycled pulp, hemp, natural fibers such as cotton, nylon, vinylon, polypropylene, polyester, acrylic, and synthetic fibers such as aramid.
There is no particular limitation as long as it is an organic fiber generally used in building materials. Although the fiber length is not particularly limited, it is usually 12
mm or less is used. The amount of organic fiber used is usually 1 to 50 parts by weight, preferably 2 to 50 parts by weight, in the case of natural fibers, based on 100 parts by weight of the total amount of granulated blast furnace slag and ultrafine powdery substance.
30 parts by weight, more preferably 3 to 15 parts by weight, in the case of synthetic fibers, the total amount of granulated blast furnace slag and ultrafine powdery substance 10
It is usually 0.1 to 15 parts by weight, preferably 0.2 to 10 parts by weight, based on 0 parts by weight. These may be used alone or in combination of two or more.

In the hydraulic composition of the present invention, various admixtures can be further used, if necessary. Specific examples of the admixture that can be used include pulverized slow-cooled slag, ferrochrome slag, wollastonite, silica, alumina, fly ash, perlite, talc, silica sand, silica powder, clay, kaolin, calcium carbonate, and ground ceramics , Titania, zirconia, mica, gravel, etc. have an average particle size of 10μ
m or more of inorganic filler, carbon fiber, glass fiber, inorganic fiber material such as steel fiber, wood chip, styrene foam, curing retarder, silane coupling agent, water repellent, surface treatment agent,
Pigments and the like. If the present invention is carried out by adding, for example, red iron oxide (iron oxide) as a pigment among these admixtures, a cured product colored brown can be obtained. When pearlite is used as a lightening material, the effect of the present invention is remarkably reduced. However, from the viewpoint of cost, it can be used as a general-purpose lightening material.

In the case of the inorganic filler and the inorganic fiber material, the amount of the admixture is usually 10 to 200 parts by weight based on 100 parts by weight of the total amount of the granulated blast furnace slag and the ultrafine powdery substance. In the case of a curing retarder, a surface treatment agent, a pigment and the like, 0.1 to 10 parts by weight is similarly used as needed.

Next, a method for producing the hydraulic composition of the present invention will be described. The hydraulic composition of the present invention can be obtained by mixing granulated blast furnace slag with an ultrafine powdery substance, a water-soluble substance, an aggregate and, if desired, the admixture in a mixer. In addition, a predetermined amount of water described below can be added to the hydraulic composition thus obtained, and the curing reaction can be stored without starting the curing reaction. A predetermined amount of an alkali stimulant and water described below are added to the hydraulic composition thus obtained,
The hydraulic composition of the present invention described in the above (2) can be obtained by mixing and kneading as necessary.

The alkali stimulants used in the present invention include:
Various alkaline substances can be used. Specific examples of alkali stimulants that can be used include sodium hydroxide, potassium hydroxide, hydroxides of alkali metals such as lithium hydroxide,
Alkali metal carbonates such as sodium carbonate and potassium carbonate, hydroxides of alkaline earth metals such as calcium hydroxide and magnesium hydroxide, sodium silicate, sodium metasilicate, potassium silicate, potassium metasilicate, sodium orthosilicate, water Examples include silicates such as glass, but are not limited to these as long as they are alkaline substances. Among these alkali stimulants, hydroxides of alkali metals are preferred, and sodium hydroxide is particularly preferred. One or more of these curing stimulants may be used in combination.

The amount of the alkali stimulant used depends on the specific surface area of the granulated blast furnace slag, the type and amount of ultrafine powdery material, the type and amount of aggregate, and the amount of water required for mixing and kneading them. Although different, in general, for a total amount of 100 parts by weight of granulated blast furnace slag and ultrafine powdery substance, 0.5 to 20 parts by weight,
Preferably it is 1 to 15 parts by weight, more preferably 2 to 10 parts by weight. The alkaline stimulant may be used as it is, but is preferably used as an aqueous solution.

As the water used in the present invention, ordinary industrial water can be used, and may be tap water, well water, ion-exchanged water, etc., and is not particularly limited. The amount of water used depends on the particle size of the granulated blast furnace slag, the amount of ultrafine powdered material added, the type and size and amount of aggregate, and the type and amount of organic fibers and admixtures used as necessary, and mixing Although it varies depending on the kneading state, it is generally 20 to 300 parts by weight, preferably 30 to 100 parts by weight, more preferably 35 to 80 parts by weight based on 100 parts by weight of the total amount of the granulated blast furnace slag and the ultrafine substance. It is.

The mixer used for mixing includes, but is not limited to, an omni mixer, a planetary mixer, an Erich-type mixer and the like. The kneader used for kneading is not particularly limited, but a kneader-ruder type kneader having both a kneader and a ruder is preferably used.

The hydraulic composition of the present invention thus obtained can be used by applying it using a trowel, a roll coater or the like, in addition to using it as an irregularly shaped material, or, if necessary, casting or press molding. Alternatively, the cured product of the present invention can be obtained by curing and curing a molded product formed into a desired shape by an extrusion molding method or the like. In the case of extrusion molding, it is preferable to use a vacuum extruder that also has a vacuum device. Curing and curing may be carried out usually at a temperature from room temperature to 200 ° C., but more preferably in a wet state. In particular, in the early stage of curing and curing, it is preferable to keep the molded body under saturated steam or prevent the molded body from being dried by means such as covering the molded body with vinyl. The curing time is not particularly limited, and the curing time until curing is sufficiently high as the curing temperature is high is not particularly limited, but is usually 4 hours to 2 hours.
It is about 8 days. Underwater curing, steam curing or autoclave curing under pressure may be used, but in order to easily obtain a high-strength cured product in a short time at a temperature of 60 to 90 ° C.
Two hours of steam curing is sufficient. The cured product thus obtained can be used as it is as a building material, but it is usually preferable to evaporate a predetermined amount of water at room temperature to about 120 ° C. before use. Drying varies greatly depending on the amount of aggregates and fibers in the cured product of the present invention, the purpose of use, and the like, but is usually 10 to 9 times the amount of water used for mixing.
0% by weight, preferably 30 to 70% by weight is removed. The cured product of the present invention thus obtained usually has a specific gravity of 1.8 to 1.3, and preferably 1.3 to 0.3 under preferable conditions.
8. The bending strength is usually 200 to 400 kgf / cm ² ,
The water absorption after day water immersion is usually 0.1 to 10% by weight.
As described above, surprisingly, the cured product of the present invention is an extremely high-performance cured product having high strength, low water absorption, and excellent water resistance despite being lightweight.

[0026]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Example 1 90 parts by weight of granulated blast furnace slag having a specific surface area of 4,000 cm ² / g, 10 parts by weight of silica fume, and ceramic filler of hollow microspheres as aggregate (Chichibu Onoda Co., Ltd.)
Product name, Microcells SLG, particle size range 20-30
0 μm, specific gravity 0.4, compressive strength 700 kgf / cm ² ) 40 parts by weight, 3 parts by weight of sodium polyacrylate having a weight average molecular weight of 1.5 million, and 5 parts by weight of pulp were mixed by an Erich mixer and mixed with water of the present invention. A hard composition was obtained. Furthermore, sodium hydroxide 3 was added to 40 parts by weight of water to the hydraulic composition.
An aqueous solution in which parts by weight were dissolved was added and further mixed. The mixture was transferred to a kneader-ruder type kneader and kneaded for about 5 minutes to obtain a hydraulic composition of the present invention.

Next, the hydraulic composition obtained above was subjected to a vacuum extruder under reduced pressure of about 20 mmHg to obtain a plate-shaped material having a thickness of 10 mm, a width of 100 mm and a length of 600 mm, and a diameter of 20 m.
After forming into a cylinder having a length of 400 mm and a length of 400 mm, it was cured at a temperature of 90 ° C. and a relative humidity of 98% for 12 hours. The cured product thus obtained was dried in a dryer at 80 ° C. for 2 days to obtain a cured product of the present invention having a specific gravity of 1.24. This plate-shaped cured body is 30 mm wide and 180 mm long in the extrusion direction.
Into a test piece, and a two-point supporting one-point loading bending strength test was performed using a universal tensile tester (Tensilon: Orientec Co., Ltd.) with a span of 150 mm and a loading speed of 0.1 mm.
When performed at 5 mm / min, the bending strength was 245 kgf /
cm ² , and the flexural modulus was 1.4 × 10 ⁵ kgf / cm ² .

The weight increase rate and the water absorption elongation rate when the plate-like cured body is immersed in water are respectively 4.
0%, 0.01%, 11% each after immersion for 15 days,
0.09%. The flexural strength and flexural modulus when the plate-like cured body was immersed in water for one week were 205 k each.
gf / cm ² and 1.22 × 10 ⁵ kgf / cm ² .

In addition, this plate-like cured product is JIS A
When a flame retardant base material test was performed according to 1321 description,
The temperature rise was 40 ° C. or less, which was a pass. Further, the obtained cured product could be sawed and screwed.
In addition, the obtained plate-like cured body was JIS A1435.
As a result of a frost damage resistance test according to the description of above, no change in appearance was observed even after the 300 cycle test. Further, when the obtained plate-shaped cured product was dried at 60 ° C. for 21 days, the change in weight moisture content and the change in length were −6.7%, respectively.
And -0.05%. Further, a water permeability test was performed on the obtained plate-like cured body according to the method described in JIS A6910, and it was 0.7 ml. Furthermore, when the obtained plate-like cured product was exposed outdoors and observed over time, there was no change in appearance even after one year had passed, and the changes in size, weight and strength were extremely small. Further, the columnar cured body was cut out to a length of 4 cm, and the loading speed was set at 0.
1000 kg when the compressive strength test was performed at 2 mm / min.
f / cm ² .

Example 2 The procedure of Example 1 was repeated except that the pulp was increased to 10 parts by weight, the polypropylene fiber (fiber length: 6 mm) was added as an organic fiber by 2 parts by weight, and the amount of water added was increased to 53 parts by weight. By performing the same operation, a hydraulic composition of the present invention was obtained. Further, this hydraulic composition was molded, cured, and dried in the same manner as in Example 1, and had a specific gravity of 1.15 and a bending strength of 2.
00 kgf / cm ² , flexural modulus 1.0 × 10 ⁵ kgf
/ Cm ² , and a cured product of the present invention having a compressive strength of 910 kgf / cm ² .

When the cured product was immersed in water, the weight increase rate and the water absorption elongation rate were 8.6% and 0.
06% and 16% after immersion for 15 days, respectively. The flexural strength and flexural modulus when immersed in water for one week were 145 kgf / cm ² and 7.7 × 1 respectively.
0 was ⁴ kgf / cm ^2. Further, the obtained cured product is
Sawing, screwing and nailing were all possible.

Example 3 In Example 1, the aggregate was changed from 40 parts by weight of Microcells SLG to 50 parts by weight of fly ash balloon (trade name: Coal Floater, manufactured by Shin-Senken Co., Ltd.).
The hydraulic composition of the present invention was obtained by performing the same operation as in Example 1 except that the pulp was reduced to 2 parts by weight, the polypropylene fiber (fiber length: 6 mm) was added to 2 parts by weight, and the amount of water added was changed to 42 parts by weight. I got something. Further, this hydraulic composition was molded, cured and dried in the same manner as in Example 1, and dried.
16. Flexural strength 215 kgf / cm ² , Flexural modulus 1.
4 × 10 ⁵ kgf / cm ² , compressive strength 1110 kgf /
cm ² of the cured product of the present invention was obtained.

The weight gain and water absorption elongation of this cured product when immersed in water were 1.1% and 0.1%, respectively, after immersion for one day.
It was 8% and 0.08% after immersion in 02% and 15 days, respectively. The flexural strength and flexural modulus when immersed in water for one week were 195 kgf / cm ² and 1.2 × 10, respectively.
^{It was 5} kgf / cm ² . Further, a water permeability test was performed on the obtained cured product according to the method described in JIS A6910, and it was 0.3 ml.

Example 4 A plate-like material having a porosity of 40% was produced from the hydraulic compositions obtained in Examples 2 and 3 (curing and curing conditions were as in Example 1).
As a result, a lightweight material having an apparent specific gravity of 0.7 (cured body of the present invention) was obtained.

Example 5 In Example 1, 50 parts by weight of silica sand (Chichibu Silica Sand No. 7) was further added, and Microcells SLG was added from 40 parts by weight to 20 parts by weight.
Example 1 except that water was replaced by 35 parts by weight instead of parts by weight
The hydraulic composition of the present invention was obtained in the same manner as in the above. Further, the hydraulic composition was molded, cured and dried in the same manner as in Example 1, and had a specific gravity of 1.60, a bending strength of 320 kgf / cm ² ,
Flexural modulus 2.0 × 10 ⁵ kgf / cm ² , compressive strength 1
A cured product of the present invention of 210 kgf / cm ² was obtained.

The rate of weight increase and the rate of elongation of water when the cured product was immersed in water were 1.3% and 0.3%, respectively, after immersion for one day.
01% and 8% after immersion for 15 days, respectively. The flexural strength and flexural modulus when immersed in water for one week were 280 kgf / cm ² and 1.8 × 10 ⁴ , respectively.
^{It was 5} kgf / cm ² . In addition, when a flame retardant base material test was performed on the plate-like cured body according to JIS A1321, the temperature rise was 35 ° C. or less, which was a pass.
In addition, the obtained plate-like cured body was JIS A1435.
As a result of a frost damage resistance test according to the description of above, no change in appearance was observed even after the 300 cycle test. When a water permeability test was performed on the obtained plate-like cured body according to JIS A6910, the result was 0.52 ml.

Example 5 In Example 1, the pulp was increased to 7 parts by weight, and vinylon fibers (produced by Unitika, fiber length 6 mm) were used as organic fibers.
Parts by weight, perlite (Mitsui perlite; 5 for processing)
Was added and the amount of water added was increased to 56 parts by weight, and the same operation as in Example 1 was carried out to obtain a hydraulic composition of the present invention. Further, this hydraulic composition was molded, cured and dried in the same manner as in Example 1, and dried.
0, flexural strength 140 kgf / cm ² , flexural modulus 0.8
× 10 ⁵ kgf / cm ² , compressive strength 720 kgf / cm
^Thus, a plate-shaped cured product (cured product of the present invention) of No. 2 was obtained.

When the cured product was immersed in water, the weight increase rate and the water absorption elongation rate were 10.8% after immersion for 1 day, respectively.
0.05% and 19% and 0.12 respectively after 15 days immersion
%Met. The flexural strength and flexural modulus when immersed in water for one week were 96 kgf / cm ² and 7.3 ×, respectively.
It was 10 ⁴ kgf / cm ² . Further, the obtained cured product could be sawed, screwed, or nailed. The cured product obtained was subjected to a water permeability test according to JIS A6910, and found to be 2.3 ml.

Example 6 1800 parts by weight of granulated blast furnace slag having a specific surface area of 4,000 cm ² / g, 200 parts by weight of silica fume, and Microcells S were mixed in an omni mixer (manufactured by Chiyoda Giken).
400 parts by weight of LG, water-soluble polymer (2-methylbutene-
Mixture of 1-maleic anhydride copolymer and sodium salt of formalin condensate of naphthalenesulfonic acid, 57 parts by weight of WORK500S (trade name, manufactured by Nippon Zeon Co., Ltd.)
140 parts by weight of a 25% by weight aqueous sodium hydroxide solution, water 4
Then, 00 parts by weight were added and kneaded for 15 minutes to obtain a hydraulic composition of the present invention. The obtained paste-like hydraulic composition was prepared according to JI
The flow value F0 measured according to the description of SR5201 is 2
The fluidity was good at 10 mm and F15 was 253 mm. This hydraulic composition was poured into a container so as not to be dried and subjected to steam curing at 90 ° C. for 24 hours. As a result, the hydraulic composition kneaded product was sufficiently cured, and had a specific gravity of 1.57, a compressive strength of 520 kgf / cm ² , Bending strength 80kgf / cm ²
The cured product of the present invention was obtained.

Example 7 The hydraulic composition of the present invention containing water and sodium hydroxide obtained in Example 1 was applied with a pressing machine at a pressure of 300 kgf to a thickness of 10 mm, a length of 300 mm and a width of 300 mm.
Into a plate shape. Then, the plate-shaped molded body was placed at 80 ° C. and a relative humidity of 98% for 6 hours to cure and harden. The cured product thus obtained was dried in a dryer at 80 ° C. for 2 days to obtain a plate-shaped cured product of the present invention having a specific gravity of 1.1.
This plate-shaped cured body was subjected to a two-point supporting one-point loading bending strength test in the same manner as in Example 1 between spans of 150 mm and a loading speed of 0.5 mm.
/ Min, the flexural strength is 170kgf / c
m ² , and the flexural modulus was 1.0 × 10 ⁵ kgf / cm ² .

The weight increase rate and the water absorption elongation rate when this plate-like cured product was immersed in water were respectively 5.
0%, 0.03%, 13% each after immersion for 15 days,
0.12%. The plate-shaped cured product was cut into a cube having a length of 1 cm square and subjected to a compressive strength test at a loading speed of 0.2 mm / min. As a result, it was 750 kgf / cm ² .
The flexural strength and flexural modulus when the plate-like cured body was immersed in water for one week were 145 kgf / cm ² , respectively.
It was 7.8 × 10 ⁵ kgf / cm ² .

[0043]

Industrial Applicability The hydraulic composition of the present invention provides a cured product that is lightweight and has high strength and is excellent in durability, workability, workability, water resistance, frost damage resistance and dimensional stability. Further, when the cured body of the present invention is obtained, a lighter material can be obtained by using a method of reducing the weight by the hollow structure. The cured product of the present invention
Outer wall material, inner wall material, base material or curtain for tile dry construction,
It is useful as any building material such as exterior materials such as gable boards and caps, interior materials, roof materials, partition materials, formwork materials, and tile joint materials.

Claims (8)

[Claims] 1. A hydraulic composition containing granulated blast furnace slag, ultrafine powdery substance, water-soluble substance and aggregate having a specific gravity of 1 or less and a compressive strength of 300 kgf / cm ² or more. 2. The hydraulic composition according to claim 1, wherein the water-soluble substance is a water-soluble polymer. 3. The hydraulic composition according to claim 1, wherein the aggregate is a ceramic filler of hollow microspheres. 4. The hydraulic composition according to claim 1, further comprising an organic fiber. 5. The method according to claim 1, further comprising an alkali stimulant and water.
5. The hydraulic composition according to any one of items 4 to 4. 6. A cured product obtained by mixing the hydraulic composition according to claim 5, molding as required, and then curing and curing. 7. A cured product obtained by mixing and molding the hydraulic composition according to claim 5, curing and curing. 8. The cured product according to claim 7, wherein the molding method is extrusion molding.