JPH0733708B2 - Special glue for joint masu construction method and joint masu construction method - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a special glue for temporarily fixing tiles to a joint in the joint pre-construction method among the tile pre-attachment construction methods, and a joint mas construction method using the same. It is a thing.

(Conventional Technology) As one of the tile pre-attachment methods, there is a joint method. In this method, a large number of recesses (joints) are formed on one surface of a resin sheet such as expanded polystyrene, and the tile surface is fitted into these recesses by using a fixative and fixed. Then, fix these tile units to the formwork,
In this state, concrete is poured, then the formwork and resin sheet are removed, and tiles are attached to buildings, etc., which makes it easy to perform complicated and time-consuming tile attaching work. Further, there are various advantages such as being applicable to a building having a complicated outer shape.

Conventionally, in this method, the fixing agent for fixing the tile to the joint of the resin sheet is wheat flour kneaded with water, or a nonvolatile content of 40 to 50, which is a mixture of starch paste and wheat flour obtained by heat treatment.
% Putty is used, but when this fixative is used, the phenomenon that the tile joints become rough after placing concrete, that is, the uncured concrete phenomenon occurs, and the tile joints are severely roughened. In this case, the tiles may not be firmly fixed and the tiles may come off later,
It was practiced to apply mortar to the tile joints after construction.

Moreover, since the tile joint is roughened by the above-mentioned fixing agent, the tile is stuck and fixed by a double-sided tape instead of this fixing agent, but it is also carried out.
It is complicated to peel off the double-sided tape after placing concrete, and the surface of the tile is soiled because the double-sided tape is attached.

The time required for the cement to come into contact with water and complete the setting is C ₃
S, C ₃ A, the stage of hydrolysis and hydration of gypsum,
The cement component was dissolved in water and reached a saturated or supersaturated state, followed by a hydration process in which the hydrated component was precipitated, and it was recognized that the Ca ion concentration in the liquid phase reached its maximum at this time. There is.

The above-mentioned conventional fixing agent containing wheat flour as a main component roughens the tile joints, the crude proteins in the wheat flour migrate to the cement side, and suppress the hydration of cement by adsorbing to cement particles and hydrates. It is considered that the phosphate forms a sparingly soluble calcium salt and coats the cement particles, delays the hydration reaction and inhibits coagulation.

(Problems to be Solved by the Invention) The present invention does not roughen tile joints as described above,
Moreover, the tile and the resin sheet can be firmly fixed, the work to fix the tile to the resin sheet is easy, and the fixing agent is left on the tile surface when the resin sheet is peeled off after placing concrete. In addition, it is intended to obtain a special glue for the joint construction method, which is easy to remove the fixative and has good storage stability, so that the joint construction method can be efficiently performed.

(Means for Solving the Problems) As a result of intensive research for solving the above problems, the present inventors have solved these problems by mixing a resin powder and an aqueous binder at a constant ratio, and are still better. They have found that they can be used as fixatives, and completed the present invention.

As the resin powder, water-insoluble substances such as polystyrene, polyvinyl chloride, polycarbonate, polyester, polyethylene, polypropylene, and phenol resin can be preferably used alone or in combination. The size of this resin powder is usually about 1 to 150 μm,
Particularly preferably, it is about 80-100 μ. If it is smaller than the above range, a fixing agent having excellent adhesion between the tile surface and the resin sheet can be obtained, but since the film formed by drying after fixing is a dense and hard film, the resin sheet is used. There is a tendency that it becomes difficult to wash with water after peeling, and if it is larger than the above range, it becomes easy to wash with water after the above dry film formation, but the resin powder easily precipitates, and the tile surface and the resin sheet Adhesion tends to be low.

Aqueous binders include, for example, starch, starch derivatives, casein, sodium alginate and other aqueous natural binders, cellulosics such as methylcellulose, carboxymethylcellulose, hydroxymethylcellulose, other cellulose derivatives, polyvinyl alcohol, polyvinylpyrrolidone and others. Aqueous synthetic binders and the like can be used alone or in combination. This water-based binder, when used as a special glue for joint construction method, mainly forms and maintains a putty state in which each component is uniformly mixed, and also has an appropriate adhesiveness between the tile surface and the resin sheet, Adhesion and the like can be imparted.

The above aqueous binder, relative to 100 parts by weight of the resin powder, it is good to use about 2 to 50 parts by weight in terms of solid content,
It is mixed in a powder state in advance and made into a putty, or it is treated with heat or chemicals to be made into a paste and mixed with resin powder for use. This aqueous binder mainly acts as described above,
After the concrete is placed and the construction is completed, it is convenient if the special glue is dried and the film is easily peeled off so that it can be washed with water, and it can be thickened with a strong adhesive and a small amount of addition. It is often preferable to use a combination of the two.

A wetting agent for the above resin powder may be added to this special glue. Examples of such wetting agents include propylene glycol, ethylene glycol, glycerin, water-soluble polyethylene glycol, water-soluble polypropylene glycol and other glycols, castor oil, Olive oil, rapeseed oil,
Sulfated oils such as cottonseed oil, soybean oil, bran oil, funnel oil and tall oil, ionic surfactants and nonionic surfactants can be used alone or in combination.

In the case of glycols, sulfated oils, etc., the wetting agent is preferably about 2 to 30 parts by weight, particularly preferably 5 to 10 parts by weight, based on 100 parts by weight of the resin powder. Is about 0.01 to 3 parts by weight, particularly preferably about 0.1 to 1 part by weight.

This special glue is produced by thoroughly mixing the above-mentioned components, and is adjusted with water so that the nonvolatile content is about 40 to 70%. Also, depending on the material used, antiseptic,
It is advisable to add a fungicide and use it.

This special glue can be applied by applying the putty shape as described above to the joints of the resin sheet, and by sticking the tiles here from the surface side, the tiles will stick. It can be fixed to joints, and a resin sheet with this tile fixed is attached to the formwork, and then concrete is poured. During this time, the tiles are jointed to the place where concrete is placed, so they will not fall off. After pouring concrete, when this special glue dries to form a film, the adhesiveness to the tile surface is almost lost,
The resin sheet can be easily peeled off from the tile surface, and even if a small amount of special glue is left on the tile surface, it can be easily removed by washing with water. And when the above concrete is cast, this special glue does not act on concrete and cement to inhibit solidification, does not cause the tile joints to become rough, and creates a firm joint, so the tile is It is securely fixed to the structure and does not peel off or fall off later.

(Example 1) 100 parts by weight of a starch-based sizing agent (Tokiwanol 100, manufactured by the applicant) having a nonvolatile content of 33.5% was diluted with 60 parts by weight of water, and the funnel oil 10 was added.
After adding and mixing parts by weight, 100 parts by weight of 100 μ polyester resin powder was gradually added with stirring to obtain a special paste.

(Example 2) In Example 1, instead of the polyester resin powder, 1 was used.
Special glue was obtained using ~ 2μ of polyvinyl chloride resin powder.

(Example 3) Propylene glycol 10 while stirring 100 parts by weight of water
After injecting a suspension in which 3 parts by weight of carboxymethyl cellulose was dispersed in 100 parts by weight, 100 parts by weight of 100 μl polyvinyl chloride resin powder was gradually added while stirring to obtain a special paste.

(Comparative Example 1) 18% non-volatile starch starch paste (Tokiwa paste Neo1, manufactured by the applicant company)
100 parts by weight of water was diluted with 60 parts by weight of water, and 100 parts by weight of third-strength flour of wheat flour was gradually added with stirring to obtain a conventional fixative.

(Comparative Example 2) In Comparative Example 1, a conventional fixing agent was obtained by using second-strength flour as the wheat flour.

(Test) The special glues of Examples 1 to 3 and the conventional fixatives of Comparative Examples 1 and 2 were measured and tested for the items shown in (1) to (5) below.

(1) Viscosity: Measured with a Visco Tester (manufactured by Rion Co., Ltd.) according to JIS-K6838.

(2) pH: Measured according to JIS-K6837.

(3) Nonvolatile matter: Measured according to JIS-K6839.

(4) Roughness: A commercially available concrete panel (12 mm thick) is wiped clean, and then a polypropylene thin strip (5 mm width, 1 mm thickness) is instantly glued to the panel surface (Richbond, manufactured by Florex Co., Ltd.). Jelly)
It was adhered in a frame shape so as to have a size of 40 × 40 mm, and the inside was used as a sample application surface such as special glue. A 100 mmφ × 20 mm high concrete pouring mold was made with corrugated paper so that the coated surface was the center.

Next, the sample is applied to the entire application surface surrounded by a strip of polypropylene, and dried mortar (cement 1:
Sand 3) Add 100 parts by weight of water to 17 parts by weight of water, knead it well, pour it to the height of the above corrugated paper mold, and then leave it indoors (18 ° C, 65% RH) for 72 hours. The solidified product was used as a test body.

After forcibly peeling the test body from the concrete panel,
The surface of the mortar that was in contact with the sample was scraped off with a metal spoon (18 cm) until it could be scraped by hand, and the scraped surface was a surface hydrophobizing agent (Konishi Co., Ltd., Bondguard).
Was sprayed.

With the spray side of the test piece facing up,
It was placed on a minimum scale of 10 mg and a maximum scale of 2000 g, manufactured by And & Co., and water was added to the scraped off portion until it became horizontal with the mortar surface, and the water injection amount was measured.

The value obtained by subtracting the non-contact volume of mortar (blank volume = volume of fixative + volume of polypropylene strip) from the average χ (cm ³ ) of water injection volume of each test body and dividing by the application volume of the sample It was rough.

[If there is no roughness: Roughness = -1.56] (5) Detergency: Use a template (made by Takeda Co., No.1513 ・ 01) on a hard glass plate, and sample 30 mmφ x 1 mm
Apply 5 pieces to thickness, and apply this for 72 hours indoors (22 ℃, 67% RH)
After curing, the glass plate was immersed in water at 15 ° C. so as to be vertical, and the time (min) until 4 out of 5 pieces started to disintegrate (disintegrate) was defined as the washability.

(Results) The results of the above tests are shown in the table.

The appearance and characteristics of the special glues of the examples were not changed even after 3 months.

(Consideration) With the special glue of the example, the mortar is not roughened, and the cleanability is better or equivalent to that of the comparative example. The conventional fixative containing wheat flour as the main component shows that the mortar is rough, that is, the mortar is uncured in the part in contact with the fixative, and thus it is found to be unsuitable as a fixative.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michiyuki Takeuchi 3-6, Koiemotocho, Tokoname City, Aichi Prefecture Inatsusu Co., Ltd. (72) Inventor, Kyoji Kawamura 3-6, Koiemotocho, Tokoname City, Aichi Prefecture Inatsux Co., Ltd. (72) Inventor Tsuneo Kozuka 1-1-16 Naguno, Nishi-ku, Nagoya-shi, Aichi Chubu Raw Materials Co., Ltd. (56) References: SHO 58-153638 (JP, U)

Claims (5)

[Claims] 1. A special paste for a joint construction method containing 2 to 50 parts by weight of an aqueous binder (as solid content) with respect to 100 parts by weight of resin powder. 2. A special glue for a joint-mass construction method, which comprises resin powder, an aqueous binder, and a wetting agent for the resin powder. 3. The special glue for the joint construction method according to claim 2, which contains 2 to 50 parts by weight of an aqueous binder (as solid content) and 2 to 30 parts by weight of a wetting agent to 100 parts by weight of the resin powder. 4. Aqueous binder 2 per 100 parts by weight of resin powder.
A joint joint construction method that uses a special glue for joint joint construction method that contains up to 50 parts by weight (solid content) and temporarily fixes the tiles to the joints of the resin sheet joint. 5. A joint sizing method characterized by temporarily fixing a tile to a joint sill of a resin sheet by using a special glue for the joint shaving method containing a resin powder, an aqueous binder, and a wetting agent for the resin powder. .