WO2006129727A1

WO2006129727A1 - Protective/reinforcing material for cement coating surface and aerosol cement spray coating material

Info

Publication number: WO2006129727A1
Application number: PCT/JP2006/310912
Authority: WO
Inventors: Takeshi Shirakawa; Fumio Nakayama
Original assignee: Idm Co., Ltd.
Priority date: 2005-06-01
Filing date: 2006-05-31
Publication date: 2006-12-07
Also published as: JP2007008801A

Abstract

A protective/reinforcing material for cement coating surfaces which is easy to use, has satisfactory in situ portability, is reduced in material loss, and produces a stable effect; a cement spray coating material; an aerosol product of these; and an application method employing these. Methyl cellulose of grade &num;1000 was added to water to prepare a solution having a viscosity of 300 cP, and the solution was mixed with an acrylic microemulsion having a particle diameter of 0.04 µm to produce a protective/reinforcing material for cement coating surfaces. This protective/reinforcing material for cement coating surfaces was packed into an aerosol container and sprayed on a surface of a flat concrete plate. Subsequently, a cement paste was applied with a brush to the part coated with the protective/reinforcing material for cement coating surfaces.

Description

Specification

Cement coated surface protection reinforcement and aerosol type cement spray coating material

[0001] The present invention, for example, applies a thin coating material mainly composed of cement to materials widely used in civil engineering structures and building structures such as concrete, mortar, and slate. The present invention relates to a cement coated surface protection reinforcing material, a cement spray coating material, an aerosol product, and a construction method using them.

Background art

[0002] Conventionally, a cement coating material mainly composed of cement has been applied to a base such as concrete, mortar, or slate with a brush, a roller, or the like for the purpose of repair. In this case, the dry out phenomenon occurs at the interface between the base surface and the coating material due to various factors such as non-uniformity of the base, weather and temperature during construction, and the presence of direct sunlight. In many cases, the applied coating material lacks strength.

[0003] As means for solving these problems, there have been taken means such as application of a primer, water-coating to a base, and mixing of a polymer into a coating material to be applied.

Disclosure of the invention

Problems to be solved by the invention

[0004] However, in the method of applying the primer, it is necessary to bring a construction tool such as a brush or a lipstick for application to the site of use, and much labor is required for cleaning after use. Also, with water hammering, depending on the conditions, it dries quickly, and the effects varied. In addition, the method of mixing the polymer into the coating material takes time and effort for mixing, but in the construction of a small area such as partial repair, the loss is large and the material is wasted.

[0005] Furthermore, the application of the cement coating material was inconvenient and economical because it necessitated cleaning of the tool each time, resulting in many coating material losses.

[0006] The present invention has been made in view of the above points, and is easy to use, convenient to carry on the construction site, and has a stable effect with a small loss of material and provides a stable effect. Reinforcing materials, cement spray coating materials, their aerosol products, and applications using them Provides a method.

Means for solving the problem

[0007] (1) The invention of claim 1

The gist is a cement-coated surface protection reinforcing material containing water and a thickener.

[0008] The cement-coated surface protection reinforcing material of the present invention contains a thickener when applied to an object (base) such as concrete, mortar, slate, etc., so that it does not sag and the base absorbs liquid. Even if it is easy to maintain, a film of water (liquid) is maintained for a certain period of time without being suddenly sucked into the substrate.

Therefore, for example, after applying the cement-coated surface protection reinforcing material of the present invention to an object, a coating material (for example, a cement coating material containing cement as a main component, cement paste, cement paste, or cement-based aerosol spraying) Applying a thin coating material with a coating thickness of about 2 mm or less (such as a coating material) can prevent the cement contained in the coating material from drying out. The strength of the film itself is improved. That is, the cement coated surface protection reinforcing material of the present invention has a dry-out of a coating material such as cement as the material itself.

Incorporating a prescription to prevent

[0010] In addition, after applying a coating material such as cement to the base, the method of applying the cement-coated surface protection reinforcing material of the present invention can also prevent dry-out of the cement. And the strength of the film itself formed by the coating material is improved.

[0011] Further, according to the present invention, a uniform water film can be formed at any location on the ground, so that the coating material may be applied to a non-uniform object such as a concrete ground, or Even when the application site is outdoors and the conditions such as the influence of the weather and the orientation of the substrate are not constant, the adhesion between the substrate and the coating material and the strength of the coating material itself can be improved evenly over the entire substrate. You can. That is, according to the present invention, it is possible to solve a problem caused by uneven conditions at the construction site of construction and civil engineering. The above-described effects of the present invention are particularly effective for repairing concrete structures, which have been increasing in recent years.

(2) The invention of claim 2

The thickener is a water-soluble polymer thickener, synthetic polymer thickener, polysaccharide thickener 2. The cement coated surface protection reinforcing material according to claim 1, characterized in that it is at least one selected from an agent and an inorganic thickener power.

[0012] The cement-coated surface protection reinforcing material of the present invention is one or more selected from a water-soluble polymer thickener, a synthetic polymer thickener, a polysaccharide thickener, and an inorganic thickener. By adding this thickener, for example, sufficient strength can be obtained even if the cement coating material applied after applying the cement coating surface protection reinforcing material or before applying it is thin. I can do it.

[0013] Examples of the water-soluble polymer thickener include methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, polyethylene oxide and the like. Examples of the synthetic polymer thickener include polyacrylic acid, acrylic polymer polyurethane, and polyether. Examples of polysaccharide thickeners include xanthan gum, uelan gum, guar gum, and derivatives thereof. Examples of inorganic thickeners include aluminum magnesium silicate, bennite, and synthetic hectorite.

[0014] All of the above thickeners have a structurally high polymer structure, and when dissolved in water, the thickener is thickened by containing water in the polymer structure. In addition, when a cement-coated surface protection reinforcing material containing these thickeners is applied by spraying, water is taken into the polymer structure to prevent water dissipation, sudden suction into the base, and even the base. It is effective to make a film of a certain amount of water on the surface.

(3) The invention of claim 3

The gist of the cement coated surface protection reinforcing material according to claim 1, wherein the viscosity is in the range of 5 to 5000 cps.

[0015] The cement-coated surface protection reinforcing material of the present invention has an effect of maintaining a constant water film by preventing the dissipation of water and rapid suction into the ground surface on the surface of the ground surface by having a viscosity of 5 cps or more. Is even higher.

[0016] Further, the cement-coated surface protection reinforcing material of the present invention has a viscosity of 5000 cps or less, so that, for example, when spraying the cement-coated surface protection reinforcing material, the rod-shaped, mousse-shaped, or spray-free It can be atomized uniformly without being possible.

[0017] In the cement coated surface protection reinforcing material of the present invention, the viscosity can be controlled by the addition amount of the thickener and the molecular weight of the thickener. If the thickener has a large molecular weight, If the addition amount of the thickener is reduced and the molecular weight of the thickener is small, by adding more, the above viscosity range and

can do.

[0018] The viscosity in the present invention is measured using a BL-type tachometer under conditions of a temperature of 20 ° C, a rotor No. 60, and a rotational speed of 6 Orpm.

(4) The invention of claim 4

The cement-coated surface according to any one of claims 1 to 3, wherein the emulsion contains an emulsion such that the active ingredient is in a ratio of 2 to 25 wt% with respect to the total amount of the cement-coated surface protection reinforcing material. The gist is protection reinforcement.

[0019] The cement-coated surface protection reinforcing material of the product of the present invention contains an emulsion. For example, the cement coating material applied after or before applying the cement-coated surface protection reinforcing material is a thin coating. Can give enough strength.

[0020] The emulsion in the present invention is not particularly limited, and examples thereof include acrylic, ethylene vinyl acetate, and styrene butadiene. Among them, acrylic emulsions have good stability when aerosolized and are not too high in viscosity, so that they can be aerosolized and formed into a uniform atomized state when sprayed. Also, if acrylic emulsions are combined, the cement coated surface protection reinforcing material film becomes transparent, and it is preferable not to form a cloudy film like when other emulsions are dried.

[0021] The mixing ratio of the emulsion is in the range of 2 to 25 wt% of the total amount of the cement-coated surface protective reinforcing material in terms of the effective component equivalent amount of the emulsion. When the content is 2 wt% or more, the above-described effect due to the incorporation of emulsion is further improved. In particular, even when the cement coated surface protection reinforcing material of the present invention is used for the purpose of strengthening the surface protection after applying a cement-based thin coating material, cement paste, cement paste, or cement-based aerosol-type spray coating material, The surface of the coating material with high effect can be strengthened.

[0022] When the content is 25 wt% or less, the aerosol can be stably formed. In addition, when spraying, it is possible to perform a uniform spray that is made into a fine force that does not come out in the form of a stick or become mousse.

(5) The invention of claim 5 The gist of the cement coated surface protection reinforcing material according to claim 4, wherein the emulsion is a microemulsion having a particle size of 0.1 µm or less.

[0023] The cement-coated surface protection reinforcing material of the present invention has an emulsion particle size of 0.1 μm or less (more preferably microemulsion of 0.05 / zm or less). Transparency when converted into

[0024] Since the transparency of the cement-coated surface protection reinforcing material depends on the proportion of the active ingredient, microemulsion is not necessarily an essential requirement for achieving transparency, but stability is good. Microemulsion is also preferable from the viewpoint that a wide range of mixing amounts can be taken.

(6) The invention of claim 6

The gist of the cement-coated surface protection reinforcing material according to any one of claims 1 to 5, which is used as a content of an aerosol product.

[0025] Since the cement-coated surface protection reinforcing material of the present invention is used as an aerosol product, it is convenient to carry at the site where it is used (many of which are construction and civil engineering sites). Can be used on site. Also, there is no need to clean equipment.

[0026] In addition, the use of cement-based coating materials in recent years is dispersed in various places such as repairing concrete cracks, repairing partial color unevenness, concealing repair marks after filling concrete defects, repairing, and renovation. Small area repair work There are many repair applications, and it is less likely to be applied to a large area at once. In such a case, the cement coated surface protection reinforcing material of the present invention used as an aerosol product is efficient and useless in use.

(7) The invention of claim 7

An aerosol container, the cement-coated surface protection reinforcing material according to any one of claims 1 to 6 accommodated in the aerosol container, and the aerosol container filled to spray the cement-coated surface protection reinforcing material. An aerosol product for enhancing the protection of the cement coated surface, characterized by having a propellant gas.

[0027] The aerosol product of the present invention is convenient to carry at the site of use (many of which are construction and civil engineering sites) and can be used at the next site as it is after use. In addition, there is no need to clean equipment.

[0028] Further, the recent use of cement-based coating materials includes repair of concrete cracks and partial color unevenness. There are many applications for repairing small areas that are dispersed in each location, such as repairing the surface of a damaged area, concealing repair marks after filling a defective part of the concrete, repairing, and rebuilding. In such cases, the aerosol product of the present invention is efficient and useless in use.

[0029] The injection gas in the present invention is not particularly limited as long as the cement-coated surface protection reinforcing material can be stably discharged. For example, DME, liquid nitrogen, liquefied carbon dioxide, LPG, chlorofluorocarbon, and a mixture thereof Is mentioned.

(8) The invention of claim 8

8. The aerosol product for strengthening cement-coated surface protection according to claim 7, wherein the propellant gas is at least one selected from DME, liquid nitrogen, liquefied carbon dioxide gas, LPG, and Freonka.

[0030] Since the aerosol product of the present invention uses the above-mentioned as a propellant gas, the cement coated surface protection reinforcing material can be discharged stably.

(9) The invention of claim 9

Before and after applying the cement-based coating material, or after Z, applying the cement-coated surface protection reinforcing material according to any one of claims 1 to 6 to the surface on which the cement-based coating material is applied. The gist of the method for strengthening the second coated surface protection.

[0031] In the present invention, for example, the cement-coated surface protection reinforcing material according to any one of claims 1 to 6 is first applied to a portion of the object (base) to which the cement-based coating material is applied later. Then, a cementitious coating material can be applied. Thereafter, a cement coated surface protection reinforcing material may be further coated on the cement-based coating material.

[0032] Alternatively, a cement-based coating material may be first applied to an object (base), and then the cement-coated surface protection reinforcing material according to any one of claims 1 to 6 may be applied thereon.

[0033] According to the present invention, for example, a cement-based coating material (cement-based thin coating material, cement paste, cement paste, cement-based aerosol-type spraying material, etc.) on construction and civil engineering construction sites. ), It is possible to easily and efficiently realize prevention of dry-out and improvement of adhesion between the base and the coating material.

[0034] Further, according to the present invention, conventionally performed primer application, water hammering, It is not necessary to perform curing after construction.

(10) The invention of claim 10

The gist of the cement coated surface protection reinforcing method according to claim 9, wherein the cement coated surface protection reinforcing material is applied using the aerosol product according to claim 7 or 8.

[0035] According to the present invention, since the cement-coated surface protection reinforcing material is applied using the aerosol product according to claim 7 or 8, tools such as a brush, a brush, and a spray gun are not necessary. There is no need to bring a primer or primer to the construction site. Furthermore, it is not necessary to clean these instruments after construction, which increases construction efficiency.

[0036] In recent years, more than half of cement-based thin coating materials are repainted, repaired, repaired cracks, etc., and many small areas are often used rather than large areas at once. In such a field, it is very inefficient to carry in a lot of tools and materials, and a lot of material is left, resulting in a lot of loss. According to the present invention, it is not necessary to prepare tools and materials just to carry aerosol products.

(11) The invention of claim 11

The main point is a cement spray coating material that is used as the contents of an aerosol product that includes A) a fast-hardening cement and B) an organic polymer of powder, and sprays the powder.

[0037] The cement spray coating material of the present invention can be used, for example, as follows. First, create a water film by spraying water on the surface of a cement-based substrate such as concrete, mortar, or slate, and spray the cement spray coating material of the present invention there. To do.

[0038] When used as described above, the cement spray coating material of the present invention is cured by causing a hydration reaction of the cement in a very short time and exhibits strength as a coating film.

[0039] Further, the cement spray coating material of the present invention is a coating film having sufficient strength even in a very thin cement layer without drying out due to the interaction between the fast-curing cement and the powdered organic polymer. Can be made. In other words, in the present invention, due to mutual curing of the fast-curing cement and the powdered organic polymer, the cement comes into contact with water and reacts to cure and develop strength through a so-called hydration reaction. [0040] Furthermore, the cement spray coating material of the present invention includes a powdered organic polymer, and thus has high adhesion to the substrate.

[0041] According to the cement spray coating material of the present invention having the above-described effects, the color, dirt, and dirt of materials generally used widely in civil and civil engineering such as concrete, mortar, and slate, and inside and outside of building structures are used. Can be repaired easily and economically. That is,

(0The cement spray coating material itself is cement, and the repair material is not noticeable with the same material as the base material such as the target concrete.

[0042] Since it is used as a GO aerosol product, it does not require tools and equipment when used in the field and can be easily used by anyone.

[0043] (m) In the case of repair coating, it is often performed while moving in various places in a small area. With conventional brush coating or roller coating, the movement of materials, tools, equipment, and in some cases The power that required cleaning and increased material loss Since the cement spray coating material of the present invention is used as an aerosol product, it is possible to largely eliminate the waste and loss that have been seen in the past.

[0044] (iv) Since the main material of the cement spray coating material is cement and is non-combustible, it is safe to burn no fire and emit harmful gases.

[0045] In addition, without mixing cement and water in advance, spray only cement (without powder organic polymer) onto a film of water (thickening agent is not blended and viscosity is low). With this method, it is inherently difficult to produce a strong coating film. In such a case, even if the cement layer has a thickness of 0.5 mm or less, a normal cement causes a dry-out phenomenon and the strength is hardly obtained. This is because even if water is sprayed on the ground and only the cement is sprayed on it, the cement is in contact with water for a maximum of about 10 minutes. In addition, the water necessary for it is dissipated into the air, and it is sucked into the ground and is insufficient.

[0046] Therefore, in the present invention, as a result of intensive studies, this problem has been solved by combining fast-curing cement and powdered organic polymer. In other words, the cement spray coating material of the present invention contains a fast-curing cement, so that curing progresses in a short time after spraying, and also contains a powdered organic polymer, so that moisture necessary for the hydration reaction of the fast-curing cement is included. Can be secured It has only water retention and improves the strength and adhesion of the coating after curing.

[0047] Examples of the powdered organic polymer in the present invention include, for example, ethylene vinyl acetate powder polymer, trade names DM-200, DM1645P, D5100P, LE-201C 5, manufactured by Clariant Polymer, and trade names 1080, manufactured by NSC Japan. 50E100, HM110, methylcellulose, hydroxyethyl cellulose, carboxymethylcellulose and the like. The particle size of the powdered organic polymer is preferably in the range of 20 to 300 μm.

[0048] In the present invention, the blending ratio (weight ratio) of A) fast-curing cement and B) organic polymer of powder is preferably in the range of 1: 0.05 to 0.30.

[0049] The dosage form of the cement spray coating material of the present invention is, for example, substantially free of water! /, In a powder form.

(12) The invention of claim 12

12. The cement spray coating material according to claim 11, wherein the fast-setting cement is any one of alumina cement, jet cement, and super-hard setting cement, or a mixture of two or more kinds.

[0050] Since the cement spray coating material of the present invention contains the above-mentioned cement as a fast-curing cement, it is particularly excellent in fast-curing.

(13) The invention of claim 13

The summary of the cement spray coating material according to claim 12, wherein the fast-curing cement further contains Portland cement.

[0051] In the cement spray coating material of the present invention, since the fast-curing cement further contains Portland cement, it is particularly excellent in fast-curing!

[0052] The cement spray coating material of the present invention can produce various colors by, for example, mixing pigments. In that case, it is preferable to contain white alumina cement and Portland cement.

(14) The invention of claim 14

The gist of the cement spray coating material according to any one of claims 11 to 13, characterized in that it contains gypsum in a proportion of 3 to 30 wt% with respect to the fast-curing cement component.

[0053] The cement spray coating material of the present invention is a ratio of 3 to 30 wt% with respect to the fast-curing cement component By including gypsum, it is cured by simply spraying it with an aerosol method and making it collide with a water film on the object, giving the desired strength. In other words, a faster instantaneous curing speed can be achieved.

In the present invention, the blending amount of gypsum is 3 wt% or more with respect to the fast-curing cement component, so that it is further excellent in fast-curing property, and if it is 30 wt% or less, the durability of the coating film after curing, Water resistance is even better.

[0054] Examples of the gypsum include natural anhydrous gypsum and natural dihydrate gypsum.

(15) The invention of claim 15

Titanium oxide and Z or inorganic powder pigment is added in an amount of 0.1 to 2 with respect to the sum of the components A) and B).

Owt. The gist of the present invention is the cement spray coating material according to any one of claims 11 to 14, which is contained at a ratio of / c ^.

[0055] The cement spray coating material of the present invention contains titanium oxide, inorganic powder pigments of each color, or both in a proportion of 0.1 to 20 wt% of the total amount of A) and B) components. It is possible to produce various colors, and the value of the product is high.

[0056] In the present invention, since the amount of titanium oxide and inorganic powder pigment is 0.1 lwt% or more, the coloring power is further increased, and by 20 wt% or less, the coating strength after curing is increased. As a result, it is possible to obtain an effect that the color fading is small when a long time has passed after coating, and the cost of the product can be kept low.

[0057] Examples of the inorganic powder pigments include iron oxide yellow, ben pattern, acid chromium, carbon black, and the like. The particle size of the inorganic powder pigment is preferably in the range of 0.5 to LO m.

[0058] If no titanium oxide or inorganic powder pigment is contained, the color of the cement spray coating material is gray when using a cement gray color or white cement.

(16) The invention of claim 16

A ratio of 5 to 200 parts by weight of inorganic powder composed of silica sand, calcium carbonate, clay, or talc and having a particle size of 100 microns or less to 100 parts by weight of component A) and B) The gist of the cement spray coating material according to any one of claims 11 to 15, which is included. [0059] The cement spray coating material of the present invention contains silica sand, calcium carbonate, clay, talc pulverized to a particle size of 100 microns or less, preferably 60 microns or less, or a mixture of two or more. As a result, the coating film strength after curing is improved, and cracking prevention when thickly applied is achieved.

[0060] The blending ratio of the inorganic powder is 5 to 200 parts by weight (more preferably 10 to: LOO parts by weight) with respect to the total amount of components A) and B). When it is 5 parts by weight or more (more preferably 10 parts by weight or more), the spray from the nozzle becomes smooth when spraying, and so-called shortness of breath does not occur. Further, the surface of the coating layer does not become brittle because the strength of the coating layer of the cement spray coating material is high by being 200 parts by weight or less (more preferably 100 parts by weight or less).

[0061] In addition, the particle size of the inorganic powder is adjusted to a particle size of 100 microns or less, more preferably 60 microns or less, in view of how the material passes through the spray nozzle or suction port in the can. Is good.

(17) The invention of claim 17

The gist of the cement spray coating material according to any one of claims 11 to 16, comprising a water-soluble polymer.

[0062] In the cement spray coating material of the present invention, the water-soluble polymer contained functions as a water retention agent, and secures moisture necessary for the hydration reaction of fast-curing cement. Therefore, the effect of preventing dry-out and improving the strength and adhesion of the coating after curing is even more remarkable.

[0063] As the water-soluble polymer, for example, there are one or more types in which methyl cellulose, hydroxyethyl cellulose, and force methylcellulose strength are also selected. The blending amount of the water-soluble polymer is preferably, for example, in the range of 0.05 wt% to 0.2 wt% of the fast-curing cement. The molecular weight of the water-soluble polymer is preferably in the range of, for example, the viscosity power of the 2 wt% aqueous solution, OOOcps to 15000 cps.

(18) The invention of claim 18

An aerosol container and any one of claims 11 to 17 contained in the aerosol container.

And a spray gas filled in the aerosol container for injecting the cement spray coating material, the cement spray coating material being powdered The gist of the aerosol product is discharged in the final state.

[0064] In the present invention, a cement spray coating material having the composition of claims 11 to 17 is filled in an aerosol container and ejected with an injection gas. By applying aerosol, it is possible for anyone to easily perform repair painting that requires special equipment and devices. In addition, even if the area to be repaired is a small area, it can be constructed without loss of cement spray coating material.

(19) The invention of claim 19

19. The aerosol product according to claim 18, which is the gas power for injection LPG or DMF.

[0065] In the aerosol product of the present invention, the injection gas is LPG or DMF (N, N-dimethyl

(Formamide), even if it contains cement spray coating material, such as cement, silica sand or inorganic pigment, which has a large specific gravity, these can be extruded and sprayed at a stable discharge pressure.

(20) The invention of claim 20

The aerosol container includes a container main body and a valve mechanism provided on an upper portion of the container main body, and the valve mechanism includes a housing communicating with the inside of the container main body, and an orifice that opens in the housing. On the side of the air container, and an outlet opening outside the air container. The stem is inserted into the housing so as to be movable up and down, the biasing means for biasing the stem upward, and the stem. A stem gasket that seals the orifice when not pushed down and opens the orifice when the stem is pushed down, and the housing includes the inside of the housing and the container body for the injection. A communication hole communicating with a gas-filled portion of the gas, and the stem gasket is moved up and down the stem; It slides on the side surface of the serial stem and gist aerosol product according to claim 18 or 19, characterized in.

[0066] In the air zonole product of the present invention, the stem gasket slides on the side surface of the stem when the stem moves up and down. For example, as shown in FIG. 2, when the stem 13 is pushed down, the stem gasket 17 is in contact with the position A above the orifice 25 on the outer surface of the stem 13. As shown in Fig. 1, when the stem 13 is returned (raised), the stem gasket 17 slides between the position A force and the orifice 25 on the outer surface of the stem 13 To do. As a result, the cement spray coating material adhering to the periphery of the orifice 25 on the outer surface of the stem 13 can be removed, so that the orifice 25 is not clogged.

[0067] In addition, the aerosol product of the present invention remains in the housing by having a communication hole that communicates the inside of the housing and the portion of the container body that is filled with the gas phase of the injection gas. Cement spray coating can be removed. This will be described in detail below with reference to FIG.

[0068] As shown in FIG. 3 (a), immediately after the contents are discharged, a mixed liquid of, for example, cement spray coating material and a mixture of spraying gas remains in the housing 11 . If the mixed liquid remains as it is, the cement spray coating material in the mixed liquid may obstruct the operation of the stem 13 or clog the orifice 25.

In the present invention, as shown in FIG. 3 (b), the spray gas force communication hole 18 in the container body 5 flows into the inside of the housing 11 and the cement spray coating material and the spray gas are supplied. The liquid level of the liquid mixture with the liquid is pushed down to the liquid level formed by the injection gas. This allows the cement spray coating material in the housing 11 to be removed. As a result, the operation of the stem 13 is not hindered by the cement spray coating material remaining in the housing 11 and the stem 25 is not clogged.

(21) The invention of claim 21

A step of spraying a cement spray coating material according to any one of claims 11 to 17 in a powder state on an object, and a liquid containing water before, Z, or after the step of the object. The gist of the repair method is characterized by having a process of spraying on the surface.

[0070] In the present invention, for example, first, a liquid containing water is sprayed on an object, and then the cement spray coating material according to any one of claims 11 to 17 is powdered on the sprayed portion. Can be sprayed with. Thereafter, a liquid containing water may be further sprayed.

[0071] Alternatively, first, the cement spray coating material according to any one of claims 11 to 17 is sprayed on the object in a powder state, and then a liquid containing water is sprayed on the sprayed portion. be able to.

[0072] According to the present invention, the organic powdered water is necessary for the hydration reaction of fast-curing cement. A fast-hardening cement in the cement spray coating material causes a hydration reaction with water in a short time while maintaining the above, so that a high-strength coating film can be stably formed in a short time.

[0073] Further, by spraying the cement spray coating material, and then applying a force to the water, it is possible to form a coating film with more stable strength. In other words, according to this method, even when the sprayed cement spray coating layer is thick, moisture necessary for the hydration reaction is supplied to the upper portion of the cement spray coating layer to further increase the strength. it can.

[0074] Examples of the object in the present invention include a base material that is widely used in civil engineering structures and building structures such as concrete, mortar, and slate.

[0075] Further, examples of the liquid containing water include water, various aqueous solutions, and the cement-coated surface protection reinforcing material of the invention according to claims 1 to 6.

[0076] In the present invention, for example, the cement spray coating material can be applied using the aerosol product according to claims 17-18. In this case, for example, if there is only an aerosol product and water, construction can be performed without other tools and equipment, so the use site is small and scattered in each place. Is preferred.

Brief Description of Drawings

FIG. 1 is a cross-sectional view of an aerosol product when a stem is not pushed down.

FIG. 2 is a cross-sectional view of an aerosol product when the stem is pushed down.

FIG. 3 is an explanatory diagram showing the action and effect of the aerosol product, where (a) shows a state in which liquid remains in the housing, and (b) shows a state in which the housing force liquid is pushed down. Explanation of symbols

1 ·· 'Aerosol container

3 ···, opening

5

7 ·· 'Valve mechanism

i l

ls-• 'stem

15 · · ·

17 •, Stem gasket 18 ··· Communication hole

19 · · · Tube

25 · · · Orifice

BEST MODE FOR CARRYING OUT THE INVENTION

[0079] Embodiments of the present invention will be described in detail below.

Example 1

[0080] (a) Production of cement-coated surface protection reinforcement

In water, methyl cellulose # 1000 grade was prepared and the viscosity was set to 300 cps. To this solution, microemulsion mainly composed of 2-ethylhexyl acrylate having a particle size of 0.035 microns and a solid content of 35 WT% was mixed. The amount of microemulsion was 10 wt% of the total active ingredient solution (including microemulsion).

[0081] Through the above process, a slightly viscous aqueous solution (cement-coated surface protection reinforcing material) having a translucency and a viscosity of 320 cps was produced.

(b) Manufacture of aerosol products for enhanced protection of cement coated surfaces

The cement-coated surface protection reinforcing material produced in (a) above was stored as its contents in a well-known aerosol container. The aerosol container was filled with DME (1,2-dimethoxyethane) as a filling gas. At this time, the ratio of the cement coated surface protection reinforcement and DME was 200 g: 60 g of harm IJ.

[0082] The cement-coated surface protection reinforcing material and the filling gas may be mixed and stored in the aerosol container or may be stored separately. When storing separately, for example, an inner bag made of a stretchable material cover is provided inside the aerosol container, and the second coated surface protection reinforcing material is stored therein, and the filling gas is outside the inner bag ( It can be filled between the inner bag and the housing of the aerosol container.

(c) Implementation of cement coated surface protection strengthening method

First, a concrete flat plate to which cement was applied was prepared. The surface moisture content of this concrete slab was 4.5%.

[0083] Next, using the aerosol product for strengthening the cement coated surface protection manufactured in (b) above, The surface of the concrete plate was sprayed with a cement-coated surface protection reinforcement as a base material.

The coating amount by spraying was set to 0.15 kg / m ² . The sprayed cement-enhanced surface-protecting reinforcing material is in a uniform spray form, and even when sprayed onto the concrete surface, there is no dripping and rapid absorption into the ground! .

Next, while there was a water film of the cement-coated surface protection reinforcing material, the cement paste was applied to the portion where the cement-coated surface protection reinforcing material was applied by a brush coating method. The coating amount of the cement paste is 1. Okg / m ^2. The composition of the cement paste is as follows. (Cement paste;)

Normal Portland cement: 100 parts

Silica sand: 50 parts

Methylcellulose # 4000: 0. 05 parts

Example 2

[0085] Cement paste was applied to the surface of the concrete flat plate. The composition, application method and application amount of the concrete flat plate and cement paste were the same as those in Example 1. Next, before the cement paste is dried, the cement coated surface protection reinforcing material is applied to the surface of the cement paste film by using the aerosol product for reinforcing cement coated surface protection manufactured in (b) of Example 1 above. Sprayed. The coating amount by spraying was set to 0.15 kg / m ² .

(Comparative Example 1)

Water was applied to the same concrete flat plate as in Example 1 as a base material. The application method is a method using a hand-type spray bottle, and the application amount is 0.15 kg / m ² .

[0086] Next, a cement paste was applied to the portion where water was applied. The composition, application amount, and application method of the cement paste are the same as in Example 1.

(Comparative Example 2)

A cement paste without applying a base material was applied to the same concrete flat plate as in Example 1. The composition, coating amount, and coating method of the cement paste are the same as in Example 1. (Test to confirm the effect of the invention)

(0 test method

For each of Example 1, Comparative Example 1, and Comparative Example 2, the cement paste was applied and then cured at 20 ° for 14 days.

[0087] Thereafter, the adhesion between the concrete flat plate as a base and the cement paste was tested. The test was conducted using a Kenken type adhesion tester.

(ii) Test results

Table 1 shows the test results.

[0088] [Table 1]

[0089] As shown in Table 1, in Example 1 in which the cement coated surface protection reinforcing method was performed using the cement coated surface protection reinforcing material, the adhesion strength was much higher than in Comparative Examples 1 and 2. I helped.

[0090] Also in Example 2, the same effect as in Example 1 was observed.

Example 3

[0091] (a) Manufacture of cement spray coating material

25 parts by weight of alumina cement and 75 parts by weight of Portland cement were mixed and ground using an Ishikawa-type Reika machine to obtain a fast-hardening cement. To this fast-hardening cement, 10 parts by weight of ethylene vinyl acetate powder polymer (trade name DM-200, manufactured by Clariant Polymer Co., Ltd.) as an organic polymer, and 60 parts by weight of silica sand No. 300 (under 60 micron particle size) A small V-shaped The mixture was mixed until it became uniform with a blender to obtain a cement spray coating material. In order to avoid water contamination as much as possible, these machines were thoroughly dried and performed in an atmosphere of dry air. The finished cement spray coating material has a powder dosage form and is substantially free of water.

(b) Manufacture of Air Zonole products

70 g of the cement spray coating material prepared in a) was placed in an aerosol container (capacity 420 cc) as its contents. In addition, the aerosol product was completed by filling the aerosol container with LPG as the propellant gas. The ratio of cement spray coating material and LPG was 70g: 150g.

The configuration of the aerosol container will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the aerosol container when the stem is not pushed down, and FIG. 2 is a cross-sectional view of the aerosol container when the stem is pushed down.

The aerosol container 1 includes a substantially cylindrical container body 5 having an opening 3 on the upper side thereof, a valve mechanism 7 provided in the opening 3, and a valve mechanism 7 in the opening 3 of the container body 5. And a metal lid body 9 for caulking and fixing to the body. Further, the valve mechanism 7 includes a housing 11, a stem 13, a panel (biasing means) 15, a stem gasket 17, a tube 19,

It has.

The housing 11 is a member having a two-stage substantially cylindrical shape whose diameter is larger at the upper side and smaller at the lower side, and is fixed to the opening 3 of the container body 5 by the lid body 9. The housing 11 has an upper opening 21 on its upper surface, and a rubber stem gasket 17 is attached thereto. The housing 11 is provided with a lower opening 23 on the lower surface thereof, and the inside of the housing 11 and the inside of the container body 5 are communicated with each other through the lower opening 23. Further, the housing 11 is provided with a communication hole 18 on the side surface thereof for communicating the inside of the housing 11 with the inside of the container body 5.

[0095] The stem 13 is a substantially cylindrical member, and has an outlet 31 on the upper surface thereof and an orifice 25 on the side surface thereof. The outlet 31 and the orifice 25 communicate with each other through a hollow portion in the stem 13. The stem 13 is a stem provided at the center of the stem gasket 17. A stem hole 29 provided at the center of the lid body 9 and the stem hole 29 is inserted so as to be movable up and down. The outer surface of the stem 13 is in airtight contact with the stem hole 27 of the gasket 17. Here, the outlet 31 of the stem 13 is outside the container body 5, and the orifice 25 is located inside the housing 11.

The panel 15 has an upper end held in an annular panel fixing groove 33 formed on the lower side of the stem 13, and a pedestal portion 35 with its lower end projecting inward from the housing 11. It is made to contact. Therefore, this panel 15 urges the stem 13 upward.

The upper end of the tube 19 is fitted to the outside of the portion 37 whose diameter is reduced in the housing 11, and the lower end thereof reaches the vicinity of the bottom of the container body 5.

[0098] When the aerosol container 1 having the above-described configuration contains a cement spray coating material, LPG, and a glass ball 39 for promoting stirring, and is allowed to stand, the container body 5 as shown in FIG. 1 and FIG. Inside, a cement spray coating layer, an LPG liquid layer, and an LPG gas layer are formed in descending order. At this time, the communication hole 18 formed in the housing 11 is in the gas layer of LPG. When discharging the contents, shake the aerosol container 1 to stir the contents so that the cement spray coating material and the LPG liquid layer are mixed.

[0099] In the aerosol product of this example, when the stem 13 is not pushed down, the state shown in FIG. 1 is obtained. At this time, the stem 13 is moved upward by the elastic force of the panel 15, and the orifice 25 is closed by the stem gasket 17. Therefore, the inside of the container body 5 and the outlet 31 of the stem 13 are not in communication, and the cement spray coating material is not discharged. On the other hand, when the user pushes down the stem 13, the state shown in FIG. At this time, the orifice 25 of the stem 13 is detached from the stem gasket 17. As a result, a path is formed from the inside of the container body 5 to the inside of the tube 19, the inside of the housing 11, the orifice 25 of the stem 13, and the outlet 31, and the contents are discharged.

[0100] The aerosol product of this example has an effect that the cement spray coating material does not easily clog the orifice 25 due to the above-described configuration. This will be specifically described below. When the stem 13 is pushed down, as shown in FIG. 2, the stem gasket 17 is in contact with a position A (see FIG. 2) above the orifice 25 on the outer surface of the housing 11. When returning the position of the stem 13 from the state of FIG. 2 to the state of FIG. 1, the stem gasket 11 is moved from the position A to the orifice. Slide the outer surface of the stem 13 up to 25. As a result, it is possible to remove the cement spray coating material adhering to the periphery of the orifice 25, so that the orifice 25 is not clogged.

[0101] Further, since the housing 11 is provided with the communication hole 18 opened in the gas phase of LPG, the cement spray coating material remaining inside the housing 11 can be removed. This will be specifically described below with reference to FIG. Since the mixed liquid of cement spray coating material and LPG (liquid layer) passes through the inside of the housing 11 when being discharged, immediately after discharging, the liquid is mixed inside the housing 11 as shown in FIG. The liquid mixture remains. If the mixed liquid remains as it is, the cement spray coating material contained in the mixed liquid may obstruct the operation of the stem 13 or clog the orifice 25.

[0102] However, in the aerosol container 1 of the present embodiment, the mixed liquid can be removed from the housing 11 by the action of the communication hole 18. That is, when the aerosol container 1 is allowed to stand after discharging, a cement spray coating layer, an LPG liquid layer, and an LPG gas layer are also formed in this order in the container body 5 as shown in FIG. 3 (b). Thus, the communication hole 18 comes to face the LPG gas layer. Then, the LPG gas flows into the inside of the housing 11 from the communication hole 18 and pushes down the liquid level of the mixed liquid of the cement spray coating material and LPG (liquid layer) to the LPG liquid level. As a result, the cement spray coating material in the housing 11 can be removed.

[0103] The cement spray coating material and the spray gas may be mixed and stored in an aerosol container, or may be stored separately. When storing separately, for example, an inner bag made of a stretchable material cover is provided inside the aerosol container, in which cement spray coating material is stored, and the propellant gas is outside the inner bag (inner bag). And between the aerosol container housing).

(c) Implementation of repair method (Part 1)

Water was sprayed on the slate substrate with a spray. Sprayed amount of water was 0. 15kg / m ^2. Next, before the water film dried, a cement spray coating material was sprayed using the aerosol product produced in (b). The cement spray coating material is sprayed in a powder state and in a drought state substantially containing water. The distance between the nozzle of the aerosol product and the slate substrate was 30 cm. The application amount of the cement spray coating material was set to 0.8 kg / m ² . On the slate substrate, A thin film of the mentament was formed uniformly, and the adhesion to the ground was also good.

(d) Implementation of repair method (Part 2)

First, the concrete pier, which was graffitied with color spray, was removed with a graffiti remover (cleaner, thinner). However, the color spray penetrated into the inside through a minute hole on the concrete surface, and it was impossible to completely remove it. In such a case, even if the conventional paint is used for repair, the texture will be different and the result will be uncomfortable.

[0104] Next, water was struck with a samurai brush on the part of the concrete pier that was to be repaired. This water hammering was performed sufficiently to form a water film on the concrete surface.

[0105] Then, immediately (while there was a water film), the cement spray coating material was sprayed using the aerosol product produced in (b). The applied cement spray coating material was initially wetted by water, but spraying was performed to the extent that this wet color disappeared.

[0106] Thereafter, water was further sprayed with a commercial sprayer within 5 minutes. The repair coating completed in this way was strong enough to not peel off even after one year. In addition, the applied cement spray coating material is a cement-based material similar to concrete piers, so the wrinkles, color, and texture did not change from the surrounding unrepaired parts, and it was finished to the extent that it did not cause any repairs. .

Example 4

[0107] Basically, in the same manner as in Example 3, a cement spray coating material and an aerosol product were manufactured.

It was. However, in Example 4, the raw materials for the cement spray coating material were as follows.

[0108] Alumina cement: 25 parts by weight

Portland cement: 75 parts by weight

Powdered organic polymer (same as Example 3): 10 parts by weight

Silica sand # 300 (particle size under 60 microns): 60 parts by weight

Titanium oxide (manufactured by Ishihara Sangyo Co., Ltd., trade name: R—820): 5: parts by weight

Iron oxide yellow as inorganic powder pigment: 0.4 parts by weight

In the manufacturing process of cement spray coating material, the titanium oxide and inorganic powder face The material was added simultaneously with the powdered organic polymer and silica sand.

[0109] The cement spray coating material and aerosol product produced in Example 4 exhibited the same effects as in Example 3.

Example 5

[0110] Basically, in the same manner as in Example 3, a cement spray coating material and an aerosol product were produced. However, in Example 5, the raw materials for the cement spray coating material were as follows.

[0111] Alumina cement: 25 parts by weight

Portland cement: 75 parts by weight

Powdered organic polymer (same as Example 3): 10 parts by weight

Silica sand # 300 (particle size under 60 microns): 60 parts by weight

Gypsum (made by Kokusai Shoji Co., Ltd., trade name: natural anhydrous gypsum): 10 parts by weight

In the manufacturing process of the cement spray coating material, the gypsum was added simultaneously with the powdered organic polymer and silica sand.

[0112] The cement spray coating material and the aerosol product produced in Example 5 exhibited the same effects as in Example 3.

Example 6

[0113] Basically, in the same manner as in Example 3, a cement spray coating material and an aerosol product were produced. However, in Example 6, the raw materials for the cement spray coating material were as follows.

[0114] Alumina cement: 25 parts by weight

Portland cement: 75 parts by weight

Powdered organic polymer (same as Example 3): 10 parts by weight

Silica sand # 300 (particle size under 60 microns): 60 parts by weight

Methylcellulose (# 10000): 0.2 parts by weight

In the manufacturing process of the cement spray coating material, the methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose were added simultaneously with the powdered organic polymer and silica sand.

[0115] The cement spray coating material and aerosol product produced in Example 6 exhibited the same effects as in Example 3. It is needless to say that the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the present invention.

[0117] For example, in Example 1 and Example 2, instead of brushing cement paste,

Using the aerosol product produced in Example 3 or Example 4, the cement spray coating material was

It may be applied.

[0118] Further, in Example 3, instead of applying water to the base, the cement-coated surface protection reinforcing material produced in Example 1 can be applied. Further, instead of watering after application of the cement spray coating material, the cement coated surface protection reinforcing material produced in Example 1 can be applied.

Claims

The scope of the claims

[1] A cement-coated surface protection reinforcement containing water and a thickener.

[2] The thickener is one or more selected from a water-soluble polymer thickener, a synthetic polymer thickener, a polysaccharide thickener, and an inorganic thickener. The cement coated surface protection reinforcing material according to claim 1.

[3] The cement coated surface protection reinforcing material according to claim 1 or 2, wherein the viscosity is in the range of 5 to 5000 cps.

[4] The cement according to any one of claims 1 to 3, wherein the emulsion contains an emulsion such that the active ingredient is in a ratio of 2 to 25 wt% with respect to the total amount of the cement-coated surface protection reinforcing material. Bonded surface protection reinforcement.

5. The cement coated surface protection reinforcing material according to claim 4, wherein the emulsion is a microemulsion having a particle size of 0.1 μm or less.

[6] The cement coated surface protection reinforcing material according to any one of claims 1 to 5, which is used as a content of an aerosol product.

[7] an aerosol container;

The cement-coated surface protection reinforcing material according to claim 1, which is contained in the aerosol container,

A spray gas filled in the aerosol container to spray the cement-coated surface protection reinforcing material;

An aerosol product for enhancing the protection of cement-coated surfaces, comprising:

[8] The aerosol product for reinforcing cement-coated surface protection according to claim 7, wherein the propellant gas is at least one selected from DME, liquid nitrogen, liquefied carbon dioxide gas, LPG, and chlorofluorocarbon.

[9] Before and after applying the cementitious coating material, or after Z, applying the cement-coated surface protection reinforcing material according to any one of claims 1 to 6 to the surface on which the cementitious coating material is applied. A special method for strengthening protection of the second coated surface.

10. The cement-coated surface protection reinforcing method according to claim 9, wherein the cement-coated surface protection reinforcing material is applied using the aerosol product according to claim 7 or 8.

[11] A) a fast-curing cement, and B) a powdered organic polymer,

Cement spray coating intended for use in aerosol products that inject powder.

[12] The cement spray coating material according to claim 11, wherein the fast-curing cement is one of alumina cement, jet cement, super-hard-hardening cement, or a mixture of two or more.

13. The cement spray coating material according to claim 12, wherein the fast-curing cement further contains Portland cement.

[14] The cement spray coating material according to any one of [11] to [13], wherein gypsum is contained in a proportion of 3 to 30 wt% with respect to the fast-setting cement component.

[15] Titanium oxide and Z or inorganic powder pigment are added in an amount of 0.1 to 2 with respect to the sum of the components A) and B).

Owt. The cement spray coating material according to any one of claims 11 to 14, which is contained at a ratio of / c ^.

[16] Inorganic powder composed of silica sand, calcium carbonate, clay, or talc and having a particle size of 100 microns or less is 5 to 200 weights per 100 weight parts of A) and B) in total. The cement spray coating material according to claim 11, wherein the cement spray coating material is contained at a ratio of parts.

[17] The cement spray coating material according to any one of [11] to [16], comprising a water-soluble polymer.

[18] an aerosol container;

The cement according to any one of claims 11 to 17, which is accommodated in the aerosol container.

Play paint,

Injecting the cement spray coating material, the spraying gas filled in the aerosol container,

An aerosol product in which the cement spray coating material is sprayed in a powder state.

[19] The gas according to claim 18, wherein the gas for injection is LPG or DMF. Azorore products.

[20] The aerosol container includes a container body and a valve mechanism provided on an upper part of the container body,

The valve mechanism includes a housing communicating with the interior of the container body;

A stem that is provided with an orifice that opens inside the housing on a side surface thereof, an outlet that opens outside the aerosol container, and is inserted into the housing so as to be movable up and down;

A biasing means for biasing the stem upward;

A stem gasket that seals the orifice when the stem is not depressed, and opens the orifice when the stem is depressed;

The housing has a communication hole that communicates the inside of the housing and a portion of the container body that is filled with the gas phase of the injection gas,

20. The aerosol product according to claim 18 or 19, wherein the stem gasket slides on a side surface of the stem when the stem moves up and down.

[21] A step of spraying the object with the cement spray coating material according to any one of claims 11 to 17 in a powder state;

A repairing method comprising: a second step of spraying a liquid containing water on the object before and after the step A and after Z.