JPH08301647A - Adhesive reinforcing material for cement concrete and composite material - Google Patents

Abstract

PURPOSE: To increase the adhesion to cement concrete and its durability by admixing blast furnace slag, an ultrafine powdery substance, a water-soluble polymer, a hardening stimulator and water. CONSTITUTION: Blast furnace slag with a Blaine's specific surface area of 200-14,000m<2> /g is combined with 5-30 pts.wt. of an ultrafine powdery substance of <=1μm average particle size to give 100 pts.wt. of their mixture. Further, 0.3-7 pts.wt. of a water-soluble polymer with an average molecular weight of >=100,000, 0.5-5 pts.wt. of hardening stimulator, as necessary, 1-15 pts.wt. of an adhesion reinforcing material and water are admixed to the mixture to give the objective concrete adhesion-reinforcing material. This adhesion- reinforcing material is adhered to cement concrete of <=1 specific gravity to form into an integrated body and the body is aged at room temperature -100 deg.C for a half day to one month to give the objective composite material.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hydraulic composition suitable for adhering and reinforcing cement concrete, and a composite material using the hydraulic composition.

[0002]

2. Description of the Related Art Cement, mortar, concrete, A
Cement-based materials such as LC (light-weight cellular concrete obtained by autoclave curing, hereinafter referred to as ALC) are widely used, but have low strength, poor freeze-thaw resistance,
There are problems such as poor sound insulation, and compounding with various materials has been studied. Among them, in particular, an organic adhesive such as an epoxy resin is generally used to form a composite with a steel plate, but the steel plate and the organic adhesive do not have fire resistance, and the problem of peeling when exposed to fire was there. Also in terms of long-term durability, organic adhesives have a problem that they decompose over a long period of time and cracks occur in the adhesive layer.

[0003]

DISCLOSURE OF THE INVENTION The present invention, by using as an adhesive reinforcing material for cement concrete,
Suitable for processing various cement concretes, manufacturing small materials to large materials and simple shape materials to complex shape materials, and high adhesive strength with them without deteriorating the characteristics of cement concretes. It is an object of the present invention to provide a durable adhesive reinforcing material and a composite material comprising the same, which does not have the above-mentioned problems. For example, AL
By combining a lightweight material such as C with the adhesive reinforcing material of the present invention, the lightweight and workability of ALC, workability,
It is an object of the present invention to solve problems such as freeze-thaw resistance and sound insulation while utilizing the property of being excellent in nonflammability, and to provide an excellent composite material.

[0004]

[Means for Solving the Problems] The present inventors have found that granulated blast furnace slag, silica fume, water-soluble polymer, hardening stimulant,
It was found that an adhesive reinforcing material containing water adheres very well to cement concrete, and found that the use of this adhesive reinforcing material as an adhesive for cement concrete can solve the above-mentioned problems. The present invention has been reached. That is, the present invention

(1) Granulated blast furnace slag, ultrafine powdery substance, water-soluble polymer, hardening stimulant and water, cement cement concrete adhesion reinforcing material, (2) Adhesion reinforcement described in (1) above A composite material in which the material (1) formed by kneading the material and optionally molding it and the cement concrete (material (2)) are brought into close contact with each other and then cured and cured, (3) The following material (3) Item 2. The material (2) or the composite material obtained by sandwiching and integrating the material (1) described in (2) above between the material (2) and the material (2), and curing and curing the material. 3): A cured product obtained by mixing granulated blast furnace slag, ultrafine powdery substance, water-soluble polymer, curing stimulant and water, kneading, molding, and curing for curing. (4) The composite material according to the above (2) or (3), wherein the material (2) is a light weight cement hardened body having a specific gravity of 1 or less, (5) The light weight cement hardened body is an ALC (lightweight foam obtained by curing an autoclave). The composite material according to (4) above, which is concrete. (6) The composite material according to the above (2), (3), (4) or (5), wherein the material (1) is a plate having a thickness of 10 mm or less.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
Cement concretes adhesion reinforcing material of the present invention, granulated blast furnace slag, ultrafine powder material, water-soluble polymer, curing stimulant,
And water. Among these, industrially produced granulated blast furnace slag has a Blaine specific surface area of 2,000 to 1
It has a particle size of 4,000 cm ² / g, all of which can be used, but 3,000 to 6,000 cm ² / g
It is economically preferable to use one having a particle size of.

The ultrafine powdery substance is preferably one order or more smaller than the average particle size of the granulated blast furnace slag, more preferably two or more orders smaller. A preferable average particle diameter is 1 μm or less, and 0.01 to 0.5 μm is more preferable. Specific examples of the ultrafine powdery substance that can be used include silica fume, calcium carbonate, fly ash, titania, zirconia, alumina, and blast furnace slag, with silica fume being preferred. The ultrafine powder is used in an amount of 5 to 30 parts by weight, preferably 7 to 15 parts by weight, in 100 parts by weight of the total amount of the granulated blast furnace slag and the ultrafine powder.

The water-soluble polymer used in the present invention is not particularly limited as long as it has the following thickening effect.
Specific examples of the water-soluble polymer that can be used include alkali metal salts of poly (meth) acrylic acid, poly (meth) acrylamide, copolymers of alkali metal salts of (meth) acrylic acid and acrylamide, methylcellulose, hydroxypropyl. Examples thereof include cellulose derivatives such as methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose, and among these, sodium salt of polyacrylic acid is preferable. Here, (meth) acrylic means acrylic or methacrylic.

Since these water-soluble polymers are used as a kneading aid of an adhesion reinforcing material, that is, a thickener, it is preferable to use one having a large molecular weight and a large thickening effect. The average molecular weight is 100,000 or more, preferably 500,000 or more, more preferably 1,0 when the alkali metal salt of poly (meth) acrylic acid is taken as an example.
Use one of at least 100,000.

The amount of these water-soluble polymers used is 0.3 to 7 parts by weight, preferably 1 to 5 parts by weight, more preferably 100 parts by weight of the total amount of granulated blast furnace slag and ultrafine powder. Is 1 to 3 parts by weight. When the amount of the water-soluble polymer used is 0.5 parts by weight or less, the kneading is not performed well, and the amount of added water tends to increase. Further, even if 10 parts by weight or more is used, the kneading property does not change any more, which is not only economically disadvantageous but also tends to deteriorate the water resistance of the finally obtained composite material.

Various alkaline substances can be used as the curing stimulant. Specific examples of curing stimulants that can be used include
Examples thereof include hydroxides, carbonates and silicates of alkali metals such as sodium, potassium and lithium, but hydroxides of alkali metals are preferable, and sodium hydroxide is most preferable. Although the curing stimulant may be used in the form of powder, it is preferably used in the state of an aqueous solution. The amount of the curing stimulant used is usually 0.5 to 5 parts by weight based on 100 parts by weight of the total weight of the granulated blast furnace slag and the ultrafine powdery substance. When the curing stimulant is used in an aqueous solution, its concentration is usually 2 to 10% by weight, preferably 4 to 8% by weight.

The amount of water used is determined so that the entire adhesive reinforcing material will be in a good (uniform) kneading state, but for approximately 100 parts by weight of the total amount of granulated blast furnace slag and ultrafine powder substance. 10 to 80 parts by weight, preferably 15 to 50 parts by weight. If the amount of water used is too small, the kneading cannot be performed, and if it is too large, the moldability will be poor even if the kneading can be performed, or the bending strength of the obtained composite material will be low, which is not preferable. When the curing stimulant is used as an aqueous solution, water is used so that the total amount of water contained in the aqueous solution is in the above range.

Various materials can be added to the adhesive reinforcing material of the present invention for the purpose of improving its moldability and physical properties of the resulting composite material. Specifically, for the purpose of improving moldability, fiber materials such as pulp, polypropylene fiber, polyethylene fiber, vinylon fiber, carbon fiber, and aramid fiber are used.
Further, fine aggregates such as silica sand, silica stone powder, and pearlite can be added for the purpose of reducing hardening shrinkage of the composite material. The amount of these fibrous substances used depends on the type, but with respect to the total amount of 100 parts by weight of granulated blast furnace slag and ultrafine powdered substances,
The amount is generally 1 to 15 parts by weight, preferably 2 to 7 parts by weight.
Similarly, the amount of fine aggregate used is 20 to 200 parts by weight, preferably 50 to 150 parts by weight.

Next, the method for producing the adhesive reinforcing material of the present invention will be described. First, a predetermined amount of granulated blast furnace slag, an ultrafine powdery substance, a water-soluble polymer and, if necessary, fibers and fine aggregates are mixed as uniformly as possible. The equipment that can be used for mixing may be any as long as the mixture can be uniformly mixed, and specific examples thereof include an Erich type mixer and an oscillating stirring type omni mixer. A hardening stimulant and water (an aqueous solution in which a hardening stimulant is dissolved in a predetermined amount of water, if necessary) are added to this powder mixture, and further mixed so that the whole mixture becomes uniform to obtain an adhesion reinforcing material of the present invention. be able to.

At this time, preferably, a strong shearing force is applied to the above mixture to knead it into a clay form. Specific examples of the kneader that can be used here include a kneader ruder, a uniaxial or biaxial paddle type kneader, a pressure kneader, and a two-roll kneader.

Next, the composite material of the present invention will be described. The adhesive reinforcing material of the present invention obtained as described above can be used as the material (1) as it is as an adhesive reinforcing material for cement concrete, but it can also be molded into a predetermined shape and used. Specific examples of the molding machine that can be used at this time include a press molding machine and a vacuum extrusion molding machine, but it is preferable to use a vacuum extrusion molding machine in which the molded body does not contain bubbles. The shape of the molded body is not particularly limited, but a plate shape having a thickness of 10 mm or less, more preferably 7 mm or less is preferable.

Next, the obtained adhesive reinforcing material (the molded body thereof if necessary) is brought into close contact with cement concretes (material (2)) to be adhesively strengthened to obtain an integral body. The material (2) used here is not particularly limited as long as it is a commonly used cement concrete, but for example, ordinary Portland cement, alumina cement, blast furnace cement, etc. are used as raw materials, and water reducing agents, foaming agents, etc. And various additives such as various aggregates and fibers, and ALC. Among these materials (2), a lightweight cement hardened product having a specific gravity of 1 or less is preferable, and ACL is particularly preferable. A light-weight cement hardened product having a specific gravity of 1 or less has low strength, particularly low bending strength because it is lightweight, and when used in a site where a large tensile force acts, the material must be thickened to provide rigidity. As a result, the material becomes heavier. The adhesive reinforcing material of the present invention can easily solve these problems by, for example, integrating with and reinforcing the lightweight cement hardened material.

Further, the material (1) may be sandwiched between two or more materials (2) to be integrated. When a plurality of materials (2) are adhesively reinforced, the following material (3) may be used instead of the material (2) as long as at least one material is the material (2). Material (3): A cured product obtained by mixing granulated blast furnace slag, ultrafine powder, water-soluble polymer, curing stimulant and water, kneading, molding, and curing. In the above, as the material (3), a material obtained by curing and curing the material (1) can be used. The curing and curing in this case can be performed in the same manner as the curing and curing of the integrated product described below. Here, the plurality of existing materials (2) or materials (3) may be the same as or different from each other. Further, in the present invention, among the above-mentioned materials (2), those which are usually cured are used, but those which are not cured can also be used.

The method of integration is not particularly limited, but usually, the adhesive reinforcing material (or molded body thereof) of the present invention is compressed by being pressure-bonded to the material (2) to be bonded or sandwiched between the material (2). And make it an integrated product. At this time, in order to prevent the moisture in the adhesive reinforcing material of the present invention from migrating to the material (2), it is necessary to wet the material (2) with water beforehand depending on the dry state of the material (2). May be high. In this case, there are a method of spraying water on the surface of the material (2) by spraying or the like, or a method of immersing the material (2) in water.

The composite material of the present invention can be obtained by curing and curing the integrated product thus obtained. Curing is carried out under the condition that the water content of the integrated product does not evaporate. Specifically, steam curing is performed at a temperature of room temperature to 100 ° C.
Since the curing reaction of the adhesion reinforcing material used in the present invention proceeds faster at higher temperatures, it is preferable to perform steam curing at a temperature near 100 ° C. Also, autoclave curing may be performed with steam at 100 ° C or higher. The curing time is usually half a day to 1 month, depending on the curing temperature. In addition, the curing time when curing with steam at around 100 ° C is
It is usually half a day to 2 days.

[0021]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. In the following, “part” means “part by weight”. Further, the tensile test, the maximum breaking load, and the maximum deflection in the examples were measured as follows. -Tensile test: The obtained composite material is cut in a direction perpendicular to the adhesive surface to form a rectangular parallelepiped having a cross section of 4 x 4 cm (the thickness varies depending on the composite material), and a jig for tensile strength measurement is coated with epoxy resin. Adhesion using, and after 24 hours, using Tensilon (manufactured by Orientec Co., Ltd.), pulling speed 0.5
mm / min. -Maximum breaking load and maximum deflection: Measured by a three-point bending test using Tensilon. Distance between spans: 26 cm, loading speed 0.5 mm / min (the test body was fixed with the material (2) on the upper surface and measured)

Reference Example 1 100 parts of ordinary Portland cement, 200 silica sand No. 6
Parts and 65 parts of water are kneaded with a mortar mixer, and 4 × 4 × 1
After pouring into a 6 cm cement mortar test body mold, it was cured in water at room temperature for 28 days to be cured to obtain a material a.

Reference Example 2 80 parts of ordinary Portland cement, 20 silica fume
Part, silica stone powder 60 parts, pulp 4 parts, molecular weight 15,000 methyl cellulose 2 parts, and water 30 parts are kneaded by a kneader ruder, and the thickness is 20 mm and the width is 4 cm and the length is 1 by a vacuum extrusion molding machine.
Material b was obtained by molding into a plate shape of 0 cm.

Reference Example 3 The material b obtained in Reference Example 2 was placed in a vinyl bag and kept at room temperature for 2 hours.
After being cured for 4 hours, the cured product obtained by curing for 4 hours in an autoclave at 180 ° C. is cut into 4 cm squares, and the material c
I got

Example 1 90 parts of granulated blast furnace slag having a Blaine value of 4000 cm ² / g and 10 parts of silica fume, 3 parts of sodium polyacrylate having an average molecular weight of 2,000,000 as a water-soluble polymer,
50 parts of silica sand No. 7 as fine aggregate is put in a mortar mixer and mixed for 2 minutes, then an aqueous solution of 1.5 parts of sodium hydroxide dissolved in 22 parts of water as a hardening stimulant is added and kneaded for 6 minutes with a kneader ruder. The kneaded product thus obtained was molded into a plate having a thickness of 5 mm and a width of 100 mm by using a vacuum extrusion molding machine to obtain a molded body of the adhesive reinforcing material of the present invention.

A molded body of the adhesive reinforcing material of the present invention is 4 × 1.
After cutting into 0 cm and using two pieces of the material a obtained in Reference Example 1 to wipe water on each long side surface (surface to be adhered) with a spray of water, lightly wipe it off, and then sandwich with 100 kgf with a pressing machine. Bonding was performed by applying a pressure of / cm ² to obtain an integrated product of the molded body of the adhesive reinforcing material of the present invention and the material a. This was put in a vinyl bag, sealed, and aged for 15 hours in a thermo-hygrostat adjusted to a temperature of 90 ° C. and a humidity of 98% to obtain a composite material of the present invention. When a tensile test was performed on this composite material, it broke not at the bonded portion but at the material a portion.

Example 2 Granulated blast furnace slag having a Blaine value of 10,000 cm ² / g was used, 3 parts of methylcellulose having an average molecular weight of 4,000 was used as a water-soluble polymer, and the amount of water added was changed to 25 parts. Was used in the same manner as in Example 1 except that the molded article of the adhesive reinforcement material of the present invention obtained in the same manner as in Example 1 was aged at a temperature of 70 ° C. and a humidity of 98% for 20 hours to obtain a composite material of the present invention. It was When a tensile test was performed on this composite material, it broke not at the bonded portion but at the material a portion.

Example 3 A composite material of the present invention was obtained in the same manner as in Example 1, except that the material c obtained in Reference Example 3 was used in place of the material a. When a tensile test was performed on this composite material, it broke at the portion of the material c, not at the bonded portion.

Example 4 The adhesive reinforcing material of the present invention obtained in the same manner as in Example 1 in which the material b obtained in Reference Example 2 was cut into a length of 10 cm and cut into 4 × 10 cm between two sheets. Molded body of
Part) was sandwiched between them and a pressure of 20 kgf / cm ² was applied by a pressing machine to bond them to obtain an integrated body of the adhesive reinforcing material of the present invention and the material b. This was put in a vinyl bag, sealed, and aged for 15 hours in a thermo-hygrostat adjusted to a temperature of 90 ° C. and a humidity of 98% to obtain a composite material of the present invention. When a tensile test was performed on this composite material, it broke at the hardened part of the material b, not at the bonded part.

Example 5 Granulated blast furnace slag 9 having a Blaine specific surface area of 4,000 cm ² / g
0 parts, silica fume 10 parts, sodium polyacrylate (molecular weight 4,000,000) 2.5 parts, silica sand 75
Part and 4 parts of pulp were put into an Erich-type mixer, and powder-mixed. Next, a hardening stimulant aqueous solution consisting of 2 parts of sodium hydroxide and 28 parts of water was added, mixed and then kneaded with a kneader ruder to obtain a clay-like kneaded material (adhesion reinforcing material of the present invention). Width of this kneaded product is 1 using a vacuum extrusion molding machine.
A molded product A was obtained by molding into 0 cm and a thickness of 4 mm.

Example 6 The adhesive reinforcing material obtained in the same manner as in Example 5 was molded in the same manner as in Example 5 to obtain a molded product B having a width of 10 cm and a thickness of 7 mm.

Example 7 Example 5 except that a curing stimulant consisting of 3 parts of sodium polyacrylate, 20 parts of silica sand, 20 parts of pearlite, 4 parts of pulp, 2.4 parts of sodium hydroxide and 34 parts of water was used. The same operation was performed to obtain a molded product C having a width of 10 cm and a thickness of 4 mm.

Example 8 The adhesive reinforcing material obtained in the same manner as in Example 7 was molded in the same manner as in Example 5 to obtain a molded body D having a width of 10 cm and a thickness of 7 mm.

Examples 9 to 12 After soaking in water in advance, the surface water was wiped off 3
Molded bodies A, B, C and D obtained in Examples 5 to 8 were closely adhered to and integrated with a 5 mm-thick ALC plate (4 cm x 30 cm), and covered with a vinyl sheet so as not to dry, and at 24 ° C at 90 ° C. The composite material of the present invention was obtained by steam curing for an hour. In the obtained composite material, the ALC and the extrusion molded body were sufficiently adhered.
Table 3 shows the results of a three-point bending test performed on the obtained composite material.

[0035]

[Table 3] Table 3 Example Molded product Maximum breaking load Maximum deflection type (Kg) (mm) 9 A 138 1.28 10 B 175 1.55 11 C 117 0.93 12 D 171 1.15

Example 13 After being immersed in water in advance, the surface water was wiped off 50
The mm-thick ALC plate (4 cm × 30 cm) and the molded body A obtained in Example 5 were cured by curing in the same manner as in Examples 9 to 12, and 4 cm ×
Formed product A having a thickness of 2 mm by a two-roll press between it and a cured product cut into a size of 30 cm (4 cm × 30
cm) were sandwiched and integrated, and again cured and cured to obtain the composite material of the present invention. The 2 mm thick adhesive layer of the obtained composite material was completely cured, and the adhesive layer and the ALC plate, and the adhesive layer and the cured product were sufficiently adhered. A three-point bending test was conducted on this composite material. As a result, the maximum breaking load was 258 kg and the maximum deflection was 1.02 mm.

Comparative Examples 1 to 7 Molded bodies A to D were cured and cured in the same manner as in Examples 9 to 12 to obtain cured bodies A, B, C and D and thicknesses of 35 mm and 50 m.
Three-point bending test of each of the ALCs of m and 100 mm was conducted. The results are shown in Table 4.

[0038]

[Table 4] Table 4 Comparative example Hardened body Maximum breaking load Maximum deflection type (Kg) (mm) 1A10-2B24-3C7-4D16-5ALC35mm170.396ALC50mm330.3. 357 ALC100mm 108-

Test Example The composite materials of the present invention obtained in Examples 9 to 11 were sufficiently dried, and the cured product side of the material (1) was heated for 20 minutes with an open flame of a burner. Even after this test, the ALC and the hard body were sufficiently adhered.

[0040]

By using the adhesive reinforcing material of the present invention as an adhesive for cement concrete, it is possible to obtain a material having high adhesive strength and high durability, and various cement concrete materials are processed into small materials. From a large material or a material having a simple shape to a material having a complicated shape, and by further adhering the cement concrete and the molded article of the adhesive reinforcing material of the present invention, the excellent properties that the cement concrete has By utilizing this, it is possible to manufacture a composite material having higher strength and excellent freeze-thaw resistance, fire resistance, sound insulation, and the like. The composite material of the present invention thus obtained is extremely useful as a building material such as a floor material, an outer wall material, a form material, and a partition material.

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Claims (6)

[Claims] 1. A cement concrete adhesion-reinforcing material comprising granulated blast furnace slag, ultrafine powder, water-soluble polymer, hardening stimulant and water. 2. A composite obtained by kneading the adhesive reinforcing material according to claim 1 and, if necessary, closely adhering the material (1) and cement concrete (material (2)), and then curing and curing. Material. 3. The material (3) according to claim 2 or the material (2) according to claim 2, or between the material (2) and the material (2).
A composite material obtained by sandwiching and integrating the described material (1) and then curing and curing it. Material (3): A cured product obtained by mixing granulated blast furnace slag, ultrafine powder, water-soluble polymer, curing stimulant and water, kneading, molding, and curing. 4. The composite material according to claim 2, wherein the material (2) is a light-weight cement hardened product having a specific gravity of 1 or less. 5. The composite material according to claim 4, wherein the light-weight cement hardened product is ALC (light-weight cellular concrete obtained by curing in an autoclave). 6. The composite material according to claim 2, wherein the material (1) is a plate having a thickness of 10 mm or less.