JPH0411156A - Special glue for joint square process and joint square process - Google Patents

Abstract

PURPOSE:To improve the efficiency of work, by using special glue for joint square process which contains resin powder and a water binding agent, and temporarily fixing a tile to the joint square of a resin made sheet. CONSTITUTION:Special glue is prepared by mixing and kneading 2-50 weight part (converted into a solid amount) of a water binding agent such as starch, methyl cellulose or the like against the resin powder 100 weight part of polystyrene, polyvinyl chloride or the like whose size is 1-150mu. And after the special glue is applied to the joint square of a sheet made of resin, tiles are temporarily fixed by pressing them against the joint square. In addition, the sheet on which the tiles are temporarily fixed is fitted to a mold frame, and then, concrete is placed thereon.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides a special glue for temporarily fixing tiles to the joints in the joint method of the tile tipping construction method, and a joint method using the same. It is related to construction methods.

(Conventional technology) One of the construction methods for tile tipping is the joint construction method. This method involves forming a large number of recesses (joints) on the side of a sheet made of resin such as expanded polystyrene, and fitting the tiles into these recesses using a fixing agent with the surface of the tile facing the sheet. The method involves fixing these tile units to the formwork, pouring concrete in this state, then removing the formwork and resin sheet, and attaching the tiles to the structure, etc., which is complicated. It has various advantages, such as the ability to easily perform tiling work, which previously required time and effort, and the ability to be applied to buildings with complex external shapes.

Conventionally, in this construction method, the fixing agent used to fix the tiles to the joints of the resin sheet contains flour kneaded with water, or a mixture of flour and starch paste obtained by heat treatment, with a non-volatile content of 40 to 40%.
A 50% putty type fixative is used, but when this fixative is used, the tile joints become rough after concrete is placed, that is, the concrete remains uncured. In severe cases, the adhesion of the tiles may become insufficient and the tiles may peel off later, so mortar has been applied to the joints of the tiles after installation.

In addition, the above fixatives cause roughness of the tile joints, so instead of using this fixative, tiles are sometimes pasted and fixed with double-sided tape.
Peeling and removing the double-sided tape after concrete is poured is a hassle, and the problem of staining the tile surface due to pasting the double-sided tape arises.

The period until cement comes into contact with water and solidification is completed is C
This is the stage of hydrolysis and hydration reaction of 3S, Ca A, and limestone wax, and after the cement components are dissolved in water and reach a saturated or supersaturated state, the hydration process is followed in which hydrated components are precipitated. It has been observed that during this period the Ca ion concentration in the liquid phase is at its highest.

The reason why the above-mentioned conventional fixatives mainly composed of wheat flour ruin the tile joints is that the crude proteins in the flour migrate to the cement side and adsorb to cement particles and hydrates, suppressing the hydration of the cement. This is thought to be because the phosphate forms a poorly soluble calcium salt and coats the cement particles, slowing the hydration reaction and inhibiting coagulation.

(Problems to be solved by Hakko) The present invention does not damage the tile joints as described above,
Moreover, the tile and resin sheet can be firmly fixed, making it easier to fix the tile to the resin sheet, and leaving the fixing agent on the tile surface when the resin sheet is removed after concrete pouring. The purpose of this invention is to obtain a special glue for the joint construction method, which has no adhesive residue, easy removal of the fixing agent, and good storage stability, and to enable an efficient joint construction method.

(Means for Solving the Problems) As a result of intensive research to solve the above problems, the present inventors have solved these problems by mixing a resin powder and an aqueous binder, thereby creating an even better fixative. The present invention has been completed based on the discovery that this can be done.

As the resin powder, for example, water-insoluble materials such as polystyrene, polyvinyl chloride, polycarbonate, polyester, polyethylene, polypropylene, and phenol resin can be suitably used alone or in combination. The size of this resin powder is generally about 1 to 150 microns, particularly preferably about 80 to 100 microns. If the size is smaller than the above range, a fixing agent with excellent adhesion between the tile surface and the resin sheet can be obtained, but the film that dries after fixing becomes a dense and hard film, so the resin sheet cannot be used. It tends to be difficult to wash with water after peeling off, and if the size is larger than the above range, it will be easier to wash with water after drying the upper layer, but the resin powder will be more likely to precipitate, and the tile surface and resin sheet will be difficult to wash. The adhesion between them tends to decrease.

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

The above aqueous binder is usually used in an amount of about 2 to 50 parts by weight in terms of solid content per 100 parts by weight of the resin powder. It is treated with chemicals and made into a paste and used by mixing it with resin powder. This water-based binder mainly has the above-mentioned effects, but it is convenient if the special glue dries and forms a film that can be easily peeled off and washed with water after concrete is poured and construction is completed. It is often preferable to use a combination of those with strong viscosity and those that can thicken with a small amount added.

The above-mentioned resin powder wetting agent may be added to this special glue, and such wetting agents include, for example, 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, nonionic surfactants, and the like can be used alone or in combination.

In the case of glycols, sulfated oils, etc., the amount of the above-mentioned wetting agent is 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. about 0.01 to 3 parts by weight, particularly preferably 0.01 to 3 parts by weight.
．． About 1 to 1 part by weight is preferable.

This special glue is produced by thoroughly mixing the above-mentioned components, and is used after adjusting the non-volatile content with water as appropriate to about 40 to 70%. Further, it is preferable to add a preservative or a fungicide as appropriate depending on the material used.

This special glue is in the form of a putty as described above, and if you apply it to the joints of the resin sheet and press the tile from the surface side, it will stick. The tiles can be fixed to the joints, and the resin sheet with the tiles fixed is attached to the formwork, and then concrete is poured. During this time, the tiles will be placed at the joints until the concrete is poured, so there will be no chance of them falling off. After concrete is poured, when this special glue dries into a film, it has almost no adhesiveness to the tile surface.
The resin sheet can be easily peeled off from the tile surface, and even if a small amount of special glue remains on the tile surface, it can be easily removed by washing with water. When pouring concrete, this special glue does not act on the concrete or cement and inhibit coagulation, creating a firm joint without causing roughness of the tile joint.
The tiles are securely fixed to the structure and will not peel or fall off later.

(Example 1) Starch-based sizing agent with non-volatile content of 33.5% (Tokiwanol 100)
, manufactured by Application Corporation) diluted 100 parts by weight with 60 parts by weight of water,
After adding and mixing 10 parts by weight of funnel oil, 100 parts by weight was added while stirring.
A special glue was obtained by gradually adding 100 parts by weight of μ polyester resin powder.

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

(Example 3) While stirring 100 parts by weight of water, inject a suspension of 3 parts by weight of carboxymethyl cellulose in 10 to 1 part of propylene glycol, and then add 100 parts by weight of 100μ polyvinyl chloride resin powder while stirring. A special glue was obtained by adding gradually.

(Comparative Example 1) 100 parts by weight of a starch-based sizing agent with a non-volatile content of 18% (Tokiwa Nori Neol, manufactured by Seisaku Zensha) was diluted with 60 parts by weight of water, and while stirring, 100 parts by weight of Mikasa strong wheat flour was gradually added. A conventional fixative was obtained.

(Comparative Example 2) In Comparative Example 1, a conventional fixative was obtained using Mikasa strong flour as wheat flour.

(Test) Regarding the special glues of Examples 1 to 3 and the conventional fixatives of Comparative Example 1.2, measurements and tests were conducted regarding the matters shown in (1) to (5) below.

(1) Viscosity: Measured using a Visco Tester (manufactured by Rion Co., Ltd.) according to JIS-6838.

(2) pH: Measured according to JIS-6837.

(3) Non-insertion portion: Measured according to JIS-6839.

(4) Roughness: Commercially available concrete panel (12mm thick)
After wiping it clean, attach a thin polypropylene strip (5 m wide, 1 m thick) to the panel surface using instant adhesive (manufactured by Florex Co., Ltd., rich bond jelly), so that the inside has 40 x 40 buttons. The inside of this frame was used as the surface to which a sample of special glue or the like was applied. A mold for concrete pouring measuring 100 cm in diameter and 20 cm in height was made from corrugated paper so that this coated surface was in the center.

Next, the sample was applied to the above-mentioned coating surface surrounded by a thin polypropylene strip, and then dried mortar (cement 1
:Sand 3) Mix well by adding 17 parts by weight of water to 100 parts by weight, and pour it into the above corrugated paper mold to the full height, then indoors (18°C, 65% RH). The specimen was left to stand for 2 hours to harden and was used as a test specimen.

After forcibly peeling the specimen from the concrete panel,
Place a metal spoon (18 cm) on the mortar surface that was in contact with the sample.
) until it could be scraped off by hand, and a surface hydrophobizing agent (manufactured by Konishi Co., Ltd., Bond Guard) was sprayed on the scraped surface.

Place the test piece on a direct-reading balance (knee-shaped) with the spray surface facing up.
Manufactured by &D, minimum scale 10■, maximum scale 2000
g), water was poured into the side drop part until it was level with the mortar surface, and the amount of water poured was measured.

The value obtained by subtracting the non-contact volume of mortar (blank volume; volume of fixative + volume of thin polypropylene strip) from the average χ (C!+) of the water injection volume of three test specimens and dividing it by the applied volume of the sample. It got rougher.

X (ci) -2,50 (coarseness 1.60 [When there is no roughness: degree of roughness = -1,56:1 (5)
Cleanability: Using a template (manufactured by Takeda Corporation, K 1513.01) on a hard glass plate, 30! l
Apply 5 pieces to a thickness of ll1φX1+am, and apply this indoors (2
2℃, 67%RH)? After curing for 2 hours, immerse the glass plate vertically in water at 15°C.
The time (min) until the particles begin to fall apart (disintegrate) was defined as the washability.

(Result) The results of the above test are shown in the table.

It should be noted that no change in appearance or characteristics was observed in any of the special glues of the Examples even after 3 months had passed.

(Discussion) With the special glue of the example, no roughness of the mortar was observed, and the cleanability was better than or equal to that of the comparative example.

Conventional fixatives containing wheat flour as a main component show roughness of the mortar, that is, unhardened mortar in the areas in contact with the fixative, and are found to be unsuitable as fixatives.

table Test results

Claims (1)

[Claims] 1. A special glue for joint construction method containing resin powder and an aqueous binder. 2. The above resin powder is polystyrene, polyvinyl chloride,
2. The special glue for joint construction method according to claim 1, which contains one or more of polycarbonate, polyester, polyethylene, polypropylene, and phenol resin. 3. The special glue for joint construction method according to claim 1 or 2, wherein the resin powder has a size of 1 to 150μ. 4. The special glue for joint construction method according to any one of claims 1 to 3, wherein the aqueous binder contains one or more of aqueous natural binders, cellulosic products, and aqueous synthetic binders. 5. The special glue for joint construction method according to any one of claims 1 to 4, further comprising a wetting agent for the resin powder. 6. The special glue for joint construction method according to claim 5, wherein the wetting agent contains one or more of glycols, surfactants, and sulfated oils. 7. 2 to 5 parts of aqueous binder per 100 parts by weight of resin powder
The special glue for joint construction method according to any one of claims 1 to 4, which contains 0 parts by weight (in terms of solid content). 8. A joint construction method characterized by temporarily fixing tiles to the joints of a resin sheet using a special glue for joint construction methods containing resin powder and an aqueous binder. 9. A joint construction method characterized by temporarily fixing tiles to the joints of a resin sheet using a special glue for joint construction methods containing resin powder, an aqueous binder, and a wetting agent.