JP2009242182A - Coloration waterproofing construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: There is no tack (stickiness) on a dried coating film applicable to waterproof finishing of various buildings, water resistance, coloring property, quick drying property, and excellent cracking followability in a temperature condition of -10 ° C. Another object is to provide a colored waterproofing method using the colored waterproofing polymer cement composition.
The present invention includes a step of applying a colored waterproofing polymer cement composition to a surface of a structure and drying to provide a colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer). The colored waterproofing polymer cement composition includes a hydraulic component made of alumina cement, Portland cement and gypsum, and a resin emulsion, and the resin emulsion solids with respect to 100 parts by mass of the hydraulic component. The content is 215 to 380 parts by mass, and the resin emulsion is a colored waterproofing method characterized by having a glass transition temperature of −40 to −5 ° C.
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Description

The present invention includes a hydraulic component and a resin emulsion, and the dried coating film (colored coating waterproof layer) has no tack (stickiness), water resistance, coloring property, quick drying property, and a temperature condition of −10 ° C. TECHNICAL FIELD The present invention relates to a colored waterproofing method using a colored waterproofing polymer cement composition that is excellent in follow-up crack cracking.

When waterproofing is applied to rooftops, basements, verandas, open corridors, and outer walls of concrete structures, polymer cement containing cement in resin emulsions is applied, and it is waterproofed to provide design and durability. A colored paint in which a pigment or the like is blended with a resin emulsion is applied to the surface of the layer.

Examples of polymer cement-based composites include Patent Literature 1 that describes a rapid hardening material composed of anhydrous gypsum and alumina cement having a weight ratio of anhydrous gypsum / alumina cement of 0.1 to 5, a white cement, and a combination of a rapid hardening material and a white cement. The main component is 5 to 200 parts by weight of polymer admixture with respect to 100 parts by weight in total, and has excellent pot life, curability and strength development during construction, no color unevenness and whiteness, and the base material is hardened A polymer cement-based composite material is disclosed that is suitable for color mortars, particularly polymer cement mortars, in which pigments are blended because of white cement.

Patent Document 2 discloses an emulsion of an acrylate ester resin in which an average particle diameter Dx of an acrylate ester resin and an average particle diameter Dy of an alumina cement satisfy a relational expression: Dx ≦ 0.1 × Dy, and A polymer cement-based composite material made of alumina cement capable of preventing the white flower phenomenon is disclosed.

Patent Document 3 includes cement, fine aggregate, a resin component, and a pigment component. As the resin component, acrylic resin emulsion is 20 to 40% by weight in solid content with respect to the total amount of the elastic color polymer cement mortar composition. In addition, an elastic color polymer cement mortar composition containing a powdery inorganic pigment and / or a liquid inorganic pigment as the pigment component is disclosed.

Patent Document 4 discloses a polymer cement mortar composition for a fabric base mainly containing cement, fine aggregate, and a water dispersible synthetic resin, wherein the water dispersible synthetic is based on the total amount of the polymer cement mortar composition for a fabric base. A polymer cement mortar composition for fabric base comprising 10 to 60% by weight of resin, and a paint containing mainly a silicone-modified acrylic resin and an acrylic resin are applied after the polymer cement mortar composition for fabric base is applied and dried. The fabric foundation surface finishing method is disclosed.

Japanese Patent No. 2672027 JP 2007-230805 A JP 2008-37717 A JP 2004-225375 A

A polymer cement containing a cement and an emulsion is used as a waterproofing material such as a building, a finishing material, and a base conditioning material.
When a waterproof layer using polymer cement is provided on the rooftop, basement, veranda, open corridor, and outer walls of concrete structures, it has excellent workability, adhesiveness, water impermeability, water resistance, and ground crack followability. Properties are required, and in particular, the ability to follow cracks in the ground that can follow the cracks in concrete is considered to be an important property in terms of waterproof performance.
Also, in construction that forms a waterproof layer, it is desirable that it be as resistant as possible to the effects of rainfall, etc. due to sudden weather changes, and a construction method that allows simple and rapid construction and materials suitable for that construction method. The demand for is increasing.
The present invention is applicable to waterproofing finishing of various buildings, has no tack (stickiness) on the dried coating film, has water resistance, coloring property, quick drying property, and is capable of following the base crack in a temperature condition of −10 ° C. It is an object of the present invention to provide a colored waterproofing method using an excellent polymer cement composition for colored waterproofing.

The present inventor has worked diligently on the above-mentioned problems, and by using a colored waterproof polymer cement composition containing a hydraulic component composed of alumina cement, Portland cement and gypsum and a resin emulsion, Colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) which has quick drying property, coloring property, and better construction workability, and is dried by applying the colored waterproofing polymer cement composition. However, it has been found that it has no tack (sticky feeling), has good base crack followability at a temperature condition of −10 ° C., and has excellent water resistance, thereby completing the colored waterproofing method of the present invention. .

That is, the first of the present invention is a step of applying a colored waterproofing polymer cement composition coating on the surface of the structure and drying to provide a colored waterproofing polymer cement composition coating film (colored coating waterproofing layer). The colored waterproofing polymer cement composition includes a hydraulic component composed of alumina cement, Portland cement, and gypsum, and a resin emulsion, and the resin emulsion is added to 100 parts by mass of the hydraulic component. The solid content is 215 to 380 parts by mass, and the resin emulsion is a colored waterproofing method characterized by having a glass transition temperature of -40 to -5 ° C.
The second of the present invention is a structure having a colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) obtained on the surface layer by the first colored waterproofing method of the present invention.

In the following, preferred modes of the colored waterproofing method of the present invention are shown, and a plurality of these can be combined in the present invention.
1) A step of applying a primer to the surface of the structure and drying to form a primer layer; and a colored waterproofing polymer cement composition applied to the upper surface of the primer layer and dried to form a colored waterproofing polymer cement composition Providing a coating film (colored coating film waterproof layer).
2) The colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) coated with the colored waterproofing polymer cement composition and dried has no tack and the colored waterproofing polymer cement composition is 1 kg. The colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) coated with / m ² and dried has a ground crack followability of 0.95 mm to 5.0 mm at a temperature condition of −10 ° C.
3) The resin emulsion contains an acrylic copolymer emulsion.
4) The alumina cement is a white alumina cement.
5) Portland cement shall be white Portland cement.
6) The colored water-proof polymer cement composition contains silica sand, a pigment and a setting retarder.
7) The colored water-proof polymer cement composition further contains a setting accelerator.

In the colored waterproofing construction method of the present invention, the dried coating film (colored coating waterproof layer) has no tack (stickiness), water resistance, coloring property, quick drying property, and resistance to cracking of the base under a temperature condition of −10 ° C. By using a polymer cement composition for coloring and waterproofing that combines excellent finish and waterproofing, a waterproof coating (colored coating waterproofing layer) that combines beauty, waterproofness and durability can be quickly produced with a small number of processes. Can be formed.

The present invention is a colored waterproofing polymer cement composition comprising a hydraulic component comprising alumina cement, Portland cement and gypsum and a resin emulsion, wherein the solid content of the resin emulsion is 100 parts by mass of the hydraulic component. A colored waterproofing method using a colored waterproofing polymer cement composition characterized by being 215 to 380 parts by mass.
Moreover, this invention is a structure which has the polymer cement composition coating film for coloring waterproofing (coloring coating film waterproofing layer) obtained by the said coloring waterproofing construction method in a surface layer.

The colored waterproofing construction method of the present invention will be described with reference to FIGS. However, this invention is not restrict | limited by FIG. 1 or FIG. 2, In addition to the wall surface of a building, it can be used for a rooftop, a basement, a veranda, an open corridor, etc. FIG. 3 shows a waterproof construction method using a conventional polymer cement composition.

In the conventional waterproofing method using a polymer cement composition, as shown in FIG. 3, a step of providing a primer layer (C-2), a step of providing a polymer cement hardened body layer (C-3), a topcoat layer (coloring) The step (C-4) of providing a (finishing material layer) is required, and a coating waterproof layer or a colored coating waterproof layer can be formed through three steps.

On the other hand, in the colored waterproofing construction method of the present invention, as shown in FIG. 1, a colored waterproofing polymer cement composition is applied and dried without providing a primer layer on the wall surface of the building. As shown in -2), a colored waterproofing polymer cement composition coating film (colored coating film waterproof layer) can be formed in one work process. The colored waterproofing polymer cement composition used in the colored waterproofing method of the present invention has a particularly high affinity with the concrete surface, and has good waterproofness and followability of cracking of the foundation even when a primer layer is not provided on the concrete surface. It can be demonstrated.

Further, the colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) obtained by applying and drying the colored waterproofing polymer cement composition used in the present invention has no tack (stickiness). Further, it is not necessary to further provide a top coat layer on the surface of the colored coating waterproof layer, not only the number of steps can be reduced, but also the materials used can be reduced, and an economically excellent effect can be obtained.

Furthermore, in the colored waterproofing method of the present invention, as shown in FIG. 1 (B-2), a primer is applied to the wall surface of the building and dried to provide a primer layer, and then the colored waterproof polymer cement composition is applied. And dried to form a colored waterproofing polymer cement composition coating (colored coating waterproof layer) in two work steps (B-2 and B-3) as shown in FIG. can do. The colored waterproofing polymer cement composition used in the colored waterproofing method of the present invention has a particularly high affinity with the concrete surface, and has good waterproofness and followability of cracking of the foundation even when a primer layer is not provided on the concrete surface. However, when a primer layer is provided on the concrete surface, the adhesive strength between the concrete surface and the colored waterproofing polymer cement composition coating film (colored coating film waterproof layer) can be further increased. This is suitable because a highly durable colored coating waterproof layer can be formed.

  Next, the primer and colored waterproofing polymer cement composition used in the present invention will be described.

The primer used in the present invention strongly adheres the building wall and the colored waterproofing polymer cement composition coating (colored coating waterproofing layer), and when the colored waterproofing polymer cement composition is applied and applied. In addition, in order to prevent moisture in the polymer cement composition from penetrating into the wall of the building, air in the pores of the wall of the building passes through the polymer cement composition and bubbles are formed on the surface of the polymer cement composition. More preferably, it is used to prevent the formation.

As the primer, a commercially available primer mainly composed of an acrylic-styrene copolymer resin or an ethylene vinyl acetate copolymer can be used, and a primer mainly composed of an acrylic-styrene copolymer resin can be suitably used.

The coating amount of the primer for the polymer cement composition is such that the resin solid content in the primer for the polymer cement composition is preferably in the range of 0.05 to 0.2 kg / m ² , particularly preferably 0.08 to 0.15 kg / it is preferable to apply a range of m ^2.
The primer application operation can be performed by applying the above-described application amount in a single process, and the primer can be applied in two to three operations.
The thickness of the primer layer for polymer cement composition obtained by applying and drying the primer for polymer cement composition is preferably in the range of 0.01 to 0.2 mm, particularly preferably in the range of 0.05 to 0.15 mm. It is preferable that

The drying time after applying the primer can be appropriately determined according to the temperature condition and ventilation condition, and it is usually preferable to dry for 0.5 to 2 hours in summer and 1 to 4 hours in winter. .

Preferred embodiments of the colored waterproof polymer cement composition used in the present invention are shown below.

  The colored waterproof polymer cement composition used in the present invention contains a hydraulic component composed of alumina cement, Portland cement and gypsum, and a resin emulsion.

Several types of alumina cements with different mineral compositions are known and commercially available, but the main component is monocalcium aluminate (CA), and commercial products can be used regardless of the type. From the viewpoint of colorability, white alumina cement is preferred.
As the alumina cement, a cement having a particle size that does not hinder the present invention may be used, and a commercially available one may be used. For example, it is preferable to use a cement having a particle size of about 1 μm to 90 μm as a main component.

Portland cement includes ordinary Portland cement, early-strength Portland cement, super-early-strength Portland cement, medium heat Portland cement, low-heat Portland cement, Portland cement such as white Portland cement, mixed cement such as blast furnace cement, fly ash cement, silica cement, etc. However, white Portland cement is preferable from the viewpoint of colorability.
As the Portland cement, one having a particle size that does not hinder the present invention may be used, and a commercially available one may be used. For example, a material having a particle size of about 1 μm to 45 μm is preferably used as a main component.

As for gypsum, each gypsum such as anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum can be used as one type or a mixture of two or more types regardless of the type.
Gypsum functions as a component that retains dimensional stability after the slurry obtained by kneading the polymer cement composition and water is cured.
As the gypsum, a gypsum having a particle diameter that does not hinder the present invention may be used, and a commercially available one can be used. For example, a gypsum having a particle diameter of about 1 μm to 100 μm is preferably used as a main component.

  The hydraulic component (total of alumina cement, Portland cement and gypsum = 100% by mass) is preferably a composition comprising 5 to 90% by mass of alumina cement, 5 to 90% by mass of Portland cement and 5 to 50% by mass of gypsum, more preferably Is composed of 10-80 mass% alumina cement, 10-85 mass% Portland cement and 6-45 mass% gypsum, more preferably 15-70 mass% alumina cement, 15-70 mass% Portland cement and 8-35 gypsum. By using a composition consisting of 35% by mass, particularly preferably 35-50% by mass of alumina cement, 30-55% by mass of Portland cement, and 10-25% by mass of gypsum, it has good rapid hardening and low shrinkage or low expansion. It is preferable because it is easy to obtain a cured product with little volume change during curing

A known resin emulsion can be used as the resin emulsion.
As the resin emulsion, a synthetic resin emulsion can be used. As the synthetic resin emulsion, a polyvinyl acetate emulsion, a copolymer emulsion of ethylene and vinyl acetate, a copolymer of ethylene, vinyl acetate and a (meth) acrylic acid derivative. Emulsion, Copolymer emulsion of ethylene and (meth) acrylic acid derivative, Emulsion of poly (meth) acrylic acid derivative, Copolymer emulsion of styrene and (meth) acrylic acid derivative, Polychloroprene latex, Vinyl acetate and chloride Ethylene, styrene, vinyl acetate, (meth) acrylic acid, such as vinyl copolymer emulsion, styrene-butadiene copolymer emulsion, acrylonitrile-butadiene copolymer emulsion, vinyl acetate and (meth) acrylic acid derivative emulsion Invitation It can be used an emulsion of a synthetic resin body and including at least one. The (meth) acrylic acid derivative means an acid derivative such as acrylic acid and / or methacrylic acid or an ester thereof, and includes at least one or more of these components.

The glass transition temperature of the polymer component contained in the resin emulsion is not particularly limited and any glass component can be used, but preferably −40 ° C. to −5 ° C., more preferably −38 ° C. to −−. A resin emulsion having a temperature of 10 ° C., particularly preferably in the range of −36 ° C. to −15 ° C. can be suitably used.

  In the polymer cement composition, the content of the hydraulic component and the solid content of the resin emulsion can be appropriately selected according to the purpose, but the solid content of the resin emulsion is preferably 215 with respect to 100 parts by mass of the hydraulic component. ~ 380 parts by mass, more preferably 220 to 350 parts by mass, particularly preferably 225 to 320 parts by mass, the coating film after drying (colored coating waterproof layer) has no tack (stickiness), A coating film (colored coating film waterproof layer) of a polymer cement composition which is excellent in quick-drying property and followability of cracking in a base under a temperature condition of −10 ° C. is preferable.

The colored waterproofing polymer cement composition used in the present invention includes a hydraulic component composed of alumina cement, Portland cement and gypsum, and a resin emulsion, and further includes a fine aggregate, a setting modifier (setting accelerator, setting retarder). And a pigment.

As the fine aggregate, silica sand, river sand, sea sand, mountain sand, crushed sand and the like can be appropriately selected and used.

As the fine aggregate, an aggregate having a particle size of 1 mm or less, preferably an aggregate having a particle size of 0.032 to 0.6 mm, more preferably an aggregate having a particle size of 0.054 to 0.425 mm, particularly preferably 0.8. The main component is an aggregate of 054 to 0.3 mm.
The particle size of the fine aggregate is measured using several sieves having different nominal dimensions as defined in JIS Z 8801.

  The setting modifier can be added as appropriate within the range that does not impair the characteristics of the hydraulic component, and the polymer cement composition can be used by appropriately selecting the components, addition amount and mixing ratio of the setting accelerator and setting retarder. This is preferable because the time can be adjusted.

As the setting accelerator, a known component that promotes setting can be used. For example, a lithium salt having a setting promoting property can be preferably used.
The setting amount of the setting accelerator is 0.002 to 1.5 parts by mass with respect to 100 parts by mass of the hydraulic component, 0.005 to 1 part by mass, and particularly 0.01 to 0.5 parts by mass. It is preferable to do.

  Examples of lithium salts include inorganic lithium salts such as lithium carbonate, lithium chloride, lithium sulfate, lithium nitrate, lithium hydroxide, lithium acetate, lithium oxalate, lithium tartrate, lithium malate, and lithium citrate. Lithium salts such as organic lithium salts can be used. In particular, lithium carbonate is preferable from the viewpoints of effects, availability, and cost.

  As the setting retarder, a known setting retarder can be used. Examples of setting retarders include organic acids such as sodium sulfate, sodium bicarbonate, sodium tartrate (L-sodium tartrate, DL-sodium tartrate, sodium hydrogen tartrate, etc.), sodium malate, sodium citrates, sodium gluconate For example, sodium salts such as inorganic sodium salts and organic sodium salts, and oxycarboxylic acids can be used alone or in combination of two or more.

Oxycarboxylic acids include oxycarboxylic acids and their salts.
Examples of the oxycarboxylic acid include aliphatic oxyacids such as citric acid, gluconic acid, tartaric acid, glycolic acid, lactic acid, hydroacrylic acid, α-oxybutyric acid, glyceric acid, tartronic acid, malic acid, salicylic acid, and m-oxybenzoic acid. Examples thereof include aromatic oxyacids such as acid, p-oxybenzoic acid, gallic acid, mandelic acid and tropic acid.
Examples of oxycarboxylic acid salts include alkali metal salts of oxycarboxylic acids (specifically, sodium salts, potassium salts, etc.), alkaline earth metal salts (specifically, calcium salts, barium salts, magnesium salts, etc.), etc. Can be mentioned.
In particular, sodium bicarbonate and sodium L-tartrate are preferred from the standpoints of setting delay effect, availability, and cost, and more preferably used in combination.

  When one or more kinds of setting retarders are used, the addition amount of each setting retarder is 0.01 to 5 parts by mass, and further 0.05 to 4 parts by mass with respect to 100 parts by mass of the hydraulic component. In particular, it is preferable to add in the range of 0.1 to 3 parts by mass.

As the pigment, a white pigment, a chromatic pigment, a black pigment, and the like can be used, and these can be used in combination of two or more. By using the pigment, the polymer cement composition can be colored, and a colored polymer cement composition coating film (colored coating film waterproofing layer) excellent in aesthetics can be formed.

  Examples of white pigments include titanium dioxide (titanium oxide), lead white, and zinc oxide. These can be used in combination of two or more.

  Known pigments can be used without limitation, for example, inorganic pigments such as metal oxides, hydroxides, sulfides, chromates, carbonates, sulfates and silicates; azo series, diphenylmethane series And organic pigments such as triphenylmethane, phthalocyanine, nitro, nitroso, anthraquinone, quinacridone red, benzidine, and condensed polycyclic. Further, it may be colored fibers or glossy metal particles. There is no restriction | limiting in particular about the hue of a chromatic color pigment, Any things, such as yellow, blue, red, and green, can be used. Two or more kinds of these pigments can be used in combination.

  Specific examples of chromatic pigments that can be used in the present invention include inorganic pigments such as petals, ultramarine blue, cobalt blue, titanium yellow, bitumen, zinc sulfide, barium yellow, cobalt blue, and cobalt green; quinacridone red, polyazo Yellow, anthraquinone red, anthraquinone yellow, polyazo red, azo lake yellow, berylene, phthalocyanine blue, phthalocyanine green, isoindolinone yellow, watching red, permanent red, para red, toluidine maroon, benzidine yellow, first sky blue, brilliant carmine 6B Organic pigments such as, colored fibers, glossy metal particles, and the like. These pigments can be used in combination of two or more.

  Examples of the black pigment include carbon black and iron black. Two or more black pigments can be used in combination.

By using white pigments, chromatic pigments, and black pigments in combination, it is possible to form a colored polymer cement composition coating film (colored coating waterproof layer) that is achromatic and highly environmentally harmonious. It can be suitably used for required construction sites.

The polymer cement composition of the present invention can contain an additive as long as the characteristics of the present invention are not impaired.
Examples of the additive include commonly used antifoaming agents, thickeners, water reducing agents, and fluidizing agents.

  As the antifoaming agent, known materials such as synthetic materials such as silicone-based, alcohol-based and polyether-based materials or plant-derived natural materials can be used. By using an antifoaming agent, it becomes easy to control the amount of bubbles contained in the colored polymer cement composition coating film (colored coating film waterproof layer) to a predetermined amount or less.

  The addition amount of the antifoaming agent can be added within a range that does not impair the characteristics of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 100 parts by mass of the hydraulic component. It is preferable to include 1.5 parts by mass, more preferably 0.01 to 1 part by mass, particularly 0.02 to 0.5 parts by mass. The addition amount of the antifoaming agent is preferably within the above range because the antifoaming effect is appropriate.

The thickener has an effect of adjusting the viscosity of the colored polymer cement composition, and particularly has an effect of imparting a good ironing workability to the colored polymer cement composition, and is excellent by the sand aggregate roller and the pattern roller. Patterning characteristics can be obtained.

The thickener includes hydroxyethyl methylcellulose, and other cellulose-based, protein-based, latex-based, and water-soluble polymer-based materials excluding hydroxyethylmethylcellulose can be used alone or in combination.
As the thickener, a water-soluble polymer such as a polyether, urethane or acrylic, a cellulose or a protein can be used, and a water-soluble polymer such as a water-soluble polyurethane can be used. A thickener can be preferably used.

  The addition amount of the thickener can be added within a range that does not impair the characteristics of the present invention, and is preferably 0.001 to 2 parts by mass, more preferably 0.005 to 1 in 100 parts by mass of the hydraulic component. It is preferable to contain 0.01 part by mass, more preferably 0.01 to 0.8 part by mass, particularly 0.03 to 0.6 part by mass. If the addition amount of the thickener is more than the above range, the fluidity may be lowered, and if it is less than the above range, dripping is likely to occur due to excessive fluidity. It is preferable to use within a suitable range.

  By using a thickener and antifoaming agent in combination, the separation of aggregates such as hydraulic components and fine aggregates, the suppression of bubble generation, and the surface of the coating film (colored coating waterproof layer) of the polymer cement composition It is preferable for improving the properties of the polymer cement composition and for improving the properties of the coating film (colored coating film waterproof layer).

  In the case of constituting a polymer cement composition, a particularly preferable component constitution includes a hydraulic component composed of alumina cement, Portland cement and gypsum, a resin emulsion, fine aggregate such as silica sand, a pigment and a setting modifier.

In the polymer cement composition of the present invention, a predetermined amount of a resin emulsion is measured in a stirring vessel, and a predetermined amount of a hydraulic component, fine aggregate, pigment, setting modifier, and blended as necessary while stirring the emulsion with a stirrer. An antifoaming agent, a thickener, etc. can be added, and it can prepare by stirring and mixing for several minutes.
Hydraulic components, fine aggregates, pigments, setting modifiers, antifoaming agents, thickeners, etc. to be blended as necessary may be added singly or in combination with several other types in advance The order of addition is not particularly limited. Moreover, what has a stirring function, such as a general solid-liquid stirrer, can be used for a stirrer without a problem.

  The polymer cement composition of the present invention is prepared by stirring and mixing a resin emulsion, a hydraulic component, a fine aggregate, a pigment, a coagulation adjusting agent, an antifoaming agent, a thickener and the like to be blended as necessary. In this case, it is preferable not to add water from the viewpoint of material separation and deterioration of physical properties of the coating film (colored coating film waterproof layer).

The polymer cement composition of the present invention is prepared by stirring and mixing a resin emulsion, a hydraulic component, a fine aggregate, a pigment and a coagulation modifier, and an antifoaming agent, a thickening agent and the like to be blended as necessary. However, when a fluidizing agent or a water reducing agent is used, the fluidity of the polymer cement composition increases due to the addition of a small amount, making it difficult to control the sagging property, so that the fluidizing agent or the water reducing agent is not used in the present invention. It is preferable.

In the present invention, a slurry of a polymer cement composition prepared by stirring and mixing a hydraulic component, a resin emulsion, fine aggregates such as silica sand, a pigment, a setting modifier, and the like is a B-type viscometer (manufactured by Toki Sangyo Co., Ltd.). ) And rotor no. 4, the viscosity measured at 6 rpm is preferably in the range of 30000-80000 mPa · s, more preferably in the range of 40000-70000 mPa · s, particularly preferably in the range of 45000-65000 mPa · s. The viscosity measured at 12 rpm is preferably in the range of 15000 to 45000 mPa · s, more preferably in the range of 20000 to 40000 mPa · s, and particularly preferably in the range of 25000 to 36000 mPa · s. It is preferable because it has coating workability and the applied coating film (colored coating film waterproof layer) has good shape retention.
The TI value is a value obtained by dividing the viscosity value of 6 rpm obtained above by the viscosity value of 12 rpm.
Moreover, the TI value (viscosity value of 6 rpm / viscosity value of 12 rpm) of the slurry of the polymer cement composition is preferably in the range of 1.50 to 2.00, more preferably in the range of 1.60 to 1.90. In particular, the range of 1.65 to 1.80 is preferable since stable ironing workability can be obtained.

  The polymer cement composition of the present invention is used by being applied to the surface of the workpiece by a general method using a roller, a trowel, a brush, a spray, and the like, and the applied coating (colored coating waterproofing layer) is dried. A coating film (colored coating film waterproof layer) of the polymer cement composition can be formed. It is preferable to repeat the same operation after drying the coating film to form a plurality of coating films. In addition, when constructing a structure such as a roof of a building or a wall of a structure, a mesh such as a nonwoven fabric or a woven fabric is sandwiched between coating films (colored coating waterproofing layer) of the polymer cement composition. A method of placing a mesh on the dried polymer cement composition coating (colored coating waterproofing layer), applying a polymer cement composition on the mesh and fixing the mesh can be adopted. Waterproof performance and a tough coating film (colored coating film waterproof layer) are preferable.

  The polymer cement composition of the present invention preferably has a drying time from the application to the surface of the work using rollers, trowels, brushes, sprays, etc. until a dried coating film (colored coating film waterproof layer) is obtained. The range of 1 to 5 hours, more preferably the range of 1.5 to 4 hours, particularly preferably the range of 2 to 3.5 hours, while ensuring good working time, quickly after the application work It is preferable because it can be dried and transferred to the next step.

In addition, a polymer cement composition coating film (colored coating film waterproofing layer) formed by applying and drying the polymer cement composition of the present invention to a surface of a workpiece using a roller, a trowel, a brush, a spray, or the like at 1 kg / m ^2. ) Preferably has a ground crack followability in the range of 0.95 to 5 mm, more preferably in the range of 0.98 to 3 mm, and particularly preferably in the range of 1 to 2 mm under the temperature condition of −10 ° C. It is preferable because highly durable waterproof properties can be imparted to buildings and structures that are used for a long period of time. In addition, the base crack crack followability is determined by measuring the elongation of the test specimen A under a predetermined temperature condition using a precision universal material testing machine under the condition of a tensile speed of 5 mm / min. The elongation at the time when the defect occurs is measured, and the elongation is defined as the base crack followability.

  The polymer cement composition coating film (colored coating film waterproof layer) formed using the polymer cement composition of the present invention does not have tack (stickiness) and the polymer cement composition coating film (color coating film waterproofing). There is no need to apply a finishing material such as a top coat on the layer. Therefore, by using the polymer cement composition of the present invention, it is possible to rapidly form a polymer cement composition coating film (colored coating film waterproof layer) having aesthetics, waterproofness and durability with a small number of steps. .

  Hereinafter, the present invention will be described in more detail based on examples. However, the present invention is not limited by the following examples.

(Evaluation and measurement method)
1) Evaluation method of drying time A primer (the same resin emulsion as in each example and comparative example) was previously added to a 5 mm thick slate plate (50 × 150 mm) under a temperature condition of 23 ° C. ± 2 ° C., and water was added to the resin emulsion. The liquid diluted 3 times) was applied in an amount of 0.2 kg / m ² . A polymer cement composition prepared by mixing and stirring a hydraulic component and various resin emulsions was applied to the primer application surface of this slate plate with a trowel in an amount of 1 kg / m ² . After application, the applied surface was touched with a finger, and the time until the polymer cement composition did not stick to the finger or was able to be applied repeatedly was defined as the drying time.

2) Evaluation method of ground crack followability (-10 ° C zero span evaluation method)
To a 5 mm thick slate plate (50 × 150 mm) with a cut in the center, a primer (a solution obtained by diluting the resin emulsion three times by adding water to the resin emulsion using the same resin emulsion as in each of the examples and comparative examples) in advance. It was applied in an amount of ² kg / m ² . A polymer cement composition prepared by mixing and stirring a hydraulic component and various resin emulsions was applied to the primer application surface of this slate plate with a trowel in an amount of 1 kg / m ² . After the application, the specimen is cured for 14 days under a temperature condition of 23 ± 2 ° C. to obtain a specimen A.
Elongation measurement by the base crack follow-up test is performed under the conditions of a test material A at a measurement temperature of −10 ° C. and a precision universal material testing machine (manufactured by Intesco Corporation, 210XLS) at a tensile speed of 5 mm / min. . The elongation when a defect such as a crack occurs in the specimen A by visual observation is measured, and the elongation is defined as the base crack followability.

3) Evaluation method of tack (stickiness) Using a primer (the same resin emulsion as in each of the examples and comparative examples) in advance on a 5 mm thick slate plate (50 × 150 mm) under a temperature condition of 23 ° C. ± 2 ° C., water is added to the resin emulsion. Was added 3 times diluted) and applied in an amount of 0.2 kg / m ² . A polymer cement composition prepared by mixing and stirring a hydraulic component and various resin emulsions was applied to the primer application surface of this slate plate with a trowel in an amount of 1 kg / m ² . After coating, the surface tackiness of the polymer cement composition coating film (colored coating film waterproof layer) cured for 1 day under a temperature condition of 23 ± 2 ° C. was evaluated by finger touch.
○: No tack, △: Tack is felt a little, ×: Tack is felt strongly

4) Evaluation method of water resistance A primer (the same resin emulsion as in each of the examples and comparative examples) was previously added to a 5 mm thick slate plate (50 × 150 mm) under a temperature condition of 23 ° C. ± 2 ° C., and water was added to the resin emulsion. The liquid diluted 3 times) was applied in an amount of 0.2 kg / m ² . A polymer cement composition prepared by mixing and stirring a hydraulic component and various resin emulsions was applied to the primer application surface of this slate plate with a trowel in an amount of 1 kg / m ² . After application, 5 g of water was dropped on the surface of the polymer cement composition coating film (colored coating film waterproof layer) cured for one day at a temperature of 23 ± 2 ° C., and the condition was visually observed after the water dried. did.

5) Measuring method of slurry viscosity Under an environment of temperature 20 ° C. and humidity 65%, first, emulsion, alumina cement, Portland cement, gypsum, silica sand and thickening which are polymer cement compositions shown in Table 1 in a 2 L plastic container The agent is added at the blending ratio shown in Table 1 (total of 1250 g) and mixed for 3 minutes under a condition of 1300 rpm using a 0.15 KW stirrer to obtain a homogeneous slurry. Immediately thereafter, a B-type viscometer (manufactured by Toki Sangyo Co., Ltd.) and rotor No. 4 was used to quickly fill a 200 mL cup with about 250 g of slurry, immediately after filling, set to 6 rpm, measure the viscosity after 1 minute of rotor rotation, and further change the setting to 12 rpm and 1 minute after rotating the rotor. Measure the viscosity.
The TI value is a value obtained by dividing the viscosity value of 6 rpm obtained above by the viscosity value of 12 rpm.
TI value = (viscosity value at 6 rpm) / (viscosity value at 12 rpm)

[Examples 1-3 and Comparative Examples 1-6]
The following materials were used.

(Resin emulsion)
1) Acrylic A
・ Proof 1299ap (Tg = -21 ° C., solid content 55%, manufactured by BASF Pozzolith)
2) Acrylic B
・ Aqua shutter stock solution (AC) (Tg = -43 ° C, solid content 54%, manufactured by Ube Industries)
3) Ethylene-vinyl acetate based aqua shutter stock solution (Tg = -3 ° C, solid content 53%, manufactured by Ube Industries)

(Raw material for polymer cement composition)
1) Hydraulic component / alumina cement (Turner White, Kerneos)
・ Portland cement (white cement, Taiheiyo Cement)
Gypsum (Type ^II anhydrous gypsum, manufactured by Central Glass Co., Ltd., Blaine specific surface area 3460 cm ² / g)
2) Fine aggregate, silica sand: No. 7 silica sand.
3) Pigment / white pigment (Taipaque CR-97, manufactured by Ishihara Techno)
・ Black pigment (Baiferox 318, manufactured by LANXESS)
4) Setting retarder:
-Bicarbonate Na: Sodium bicarbonate (made by Tosoh Corporation).
-Sodium tartrate: L-disodium tartrate (manufactured by Fuso Chemical Industries).

(Preparation of polymer cement composition)
A hydraulic cement, fine aggregate, pigment, setting controller and various resin emulsions were mixed for 3 minutes at a blending ratio shown in Table 1 to prepare a polymer cement composition.

  About the obtained polymer cement composition, slurry characteristics, drying time, -10 ° C zero span, tack (stickiness) and water resistance were evaluated. The results are shown in Table 1.

In Comparative Example 1 and Comparative Example 2, the drying time, tack (stickiness), and water resistance were good, but the amount of the resin emulsion was too small relative to the amount of the hydraulic component. Was less than 1.0 mm, which was insufficient as a base material crack followability of the waterproof material. In the case of Comparative Example 5, the drying time and tack (stickiness) were good, but the water resistance was poor, and the obtained coating film (colored coating film waterproof layer) had a −10 ° C. zero span. It was as small as 0.9 mm or less, and was insufficient as a base material crack followability of the waterproof material.
Since Comparative Example 3 has tackiness (stickiness), when walking on the paint film (colored paint waterproof layer), the paint film (color paint waterproof layer) adheres to the shoe and the paint film (color paint waterproof layer) ) May be damaged, and further, dust and the like will adhere and become dirty, and the appearance will be impaired.
In Comparative Example 4, the tack (stickiness) was strong and the water resistance was poor.

  In Examples 1 to 3, since the drying time is fast, the construction time can be shortened when coating twice, and the coating film (colored coating waterproof layer) becomes a colored finish layer by coloring with a pigment. In addition, it is possible to omit a coating process for applying paint or the like. In addition, since there is no tack (feel of stickiness), it is possible to walk on the paint film (colored paint waterproof layer) after drying, and it is possible to keep aesthetics for a long time without causing dirt due to dust. . Furthermore, since the water resistance is good and a −10 ° C. zero span can be secured at 1.0 mm or more, the performance as a waterproof material can be sufficiently satisfied.

[Example 4]
(Prototype experiment of structure with colored coating waterproof layer on the surface)
Polymer cement composition prepared by mixing hydraulic components, fine aggregates, pigments, setting modifiers and various resin emulsions at a temperature of 23 ° C. ± 2 ° C. for 3 minutes at the mixing ratio shown in Example 1 shown in Table 1. Was prepared.
Next, the prepared polymer cement composition was applied and applied to the surface of the concrete wall shown in FIG. 3 at a temperature condition of 23 ± 2 ° C. using a pattern roller so that the applied amount was 1 kg / m ² . When the adhesiveness (tack) of the surface of the polymer cement composition coating film (colored coating waterproof layer) cured for one day after the construction of the polymer cement composition was evaluated by finger touch, tackiness (tackiness) was recognized. Therefore, a colored paint waterproofing layer having a good finished surface could be formed.

It is a fragmentary sectional view which shows typically an example of the construction procedure of the coloring waterproofing method of this invention. It is a fragmentary sectional view which shows typically an example of the construction procedure of the conventional waterproofing construction method. It is a perspective view of the concrete structure which provided the colored coating-film waterproof layer by the colored waterproofing construction method of this invention.

Claims (9)

A colored waterproofing construction method comprising a step of applying a colored waterproofing polymer cement composition to a surface of a structure and drying to form a colored waterproofing polymer cement composition coating film (colored coating waterproofing layer). The waterproof polymer cement composition includes a hydraulic component made of alumina cement, Portland cement and gypsum, and a resin emulsion. The solid content of the resin emulsion is 215 to 380 parts by mass with respect to 100 parts by mass of the hydraulic component. Yes, the resin emulsion has a glass transition temperature of -40 to -5 ° C. A step of applying a primer to the surface of the structure and drying to form a primer layer, and a colored waterproofing polymer cement composition coating film to which the colored waterproofing polymer cement composition is applied and dried on the upper surface of the primer layer The colored waterproofing construction method according to claim 1, further comprising a step of providing (colored coating waterproofing layer). The colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) coated with the colored waterproofing polymer cement composition and dried has no tack, and the colored waterproofing polymer cement composition is 1 kg / m. ⁽²⁾ A colored waterproofing polymer cement composition coating film (colored coating film waterproofing layer) that has been applied and dried is characterized by having a base crack followability of 0.95 mm to 5.0 mm at a temperature condition of −10 ° C. The colored waterproofing construction method according to claim 1 or 2. The colored waterproofing method according to any one of claims 1 to 3, wherein the resin emulsion includes an acrylic copolymer emulsion. The colored waterproofing method according to claim 1, wherein the alumina cement is a white alumina cement. The colored waterproof construction method according to claim 1, wherein the Portland cement is white Portland cement. The colored waterproofing polymer method according to any one of claims 1 to 6, wherein the colored waterproofing polymer cement composition contains silica sand, a pigment, and a setting retarder. The colored waterproofing construction method according to any one of claims 1 to 7, wherein the colored waterproofing polymer cement composition further includes a setting accelerator. The structure which has the polymer cement composition coating film for coloring waterproofing (coloring coating film waterproofing layer) in the surface layer obtained by the coloring waterproofing construction method of any one of Claims 1-8.

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