JPH07112414A - Method of treating surface of cast-in tile in pc slab - Google Patents

Abstract

PURPOSE:To prevent cement paste leaking on the surface side of tile from directly adhering to the tile. CONSTITUTION:In a form bed 10 provided on the inner surface of a form, a large number of tiles are laid close together through joint material 12. After that, concrete C is placed within the form and, after being solidified, removed from the form so as to sticking the tiles 14 along closely laid shape to the surface of a PC slab under the condition that the surfaces of the tiles 14 and the joint material 12 is covered with polymer emulsion 18, which is water- insoluble and alkali-soluble, in order to clean the surface of the tile 14 with alkali solution after demolding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for removing stains on a tile surface after demolding in a PC plate having a tile fixed on the surface in advance.

[0002]

2. Description of the Related Art As a method of fixing tiles on the surface of a PC plate, there is a pre-attachment method. In this method, as shown in FIG. 2A, a tile sheet 4 in which a large number of tiles 3 are spread through a joint material 2 is laid on a formwork bed 1 provided on the inner bottom surface of the formwork. Later, concrete C is placed inside the mold, and after solidification, the mold 3 is removed to adhere the tile 3 to the surface of the concrete C along the spread shape of the joint material 2. By peeling off the sheet 4 and removing the joint material 2, as shown in FIG. 2B, it is possible to obtain a tiled PC plate having an arrangement along a predetermined joint interval.

[0003]

However, in this method, the sealing by the joint material 2 tends to be incomplete, and as shown in FIG. 2 (b), the cement paste of the placed concrete C is used as the joint material 2. And sneaks into the surface side of the tile 3 through the gap between the tile 3 and the tile 3 and becomes a solidified product A, which is a cause of soiling the surface of the tile 3.

In order to remove the solidified substance A, conventionally, a physical removing means such as water jet injection is used.
It was not something that could be removed completely, and it was also the cause of polluting the surrounding environment by scattering of jet water around the area.

Furthermore, since the surface of the tile 3 that has been treated with a glaze has acid resistance, there is also a method of scraping off the adhering material by dissolving it using a scrubbing brush soaked in water containing acid. In this case, there is a risk that the acid will penetrate the joint gap and penetrate into the concrete side, thereby deteriorating the concrete or decreasing the adhesive force with the tile.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a surface treatment for a pre-tiled tile in a PC plate which can prevent the cement paste leaking to the tile surface side from directly adhering to the tile. It provides a method.

[0007]

In order to achieve the above-mentioned object, the present invention is to spread a large number of tiles through a joint material on a formwork bed provided on the inner surface of the formwork, and then to place the inside of the formwork. In the method of placing the tile on the surface of the PC plate along the paved shape by pouring concrete, and then demolding after solidification, the surface of the tile or the surface of the tile and the joint material is previously insoluble in water. It is characterized in that it is coated with an alkali-soluble polymer emulsion, and after the demolding, the surface of the tile is washed with an alkaline solution.

[0008]

With the above construction, the cement paste leaking to the surface side of the tile is a strong alkali, so the polymer emulsion is melted, the cement paste is taken into the inside, and the cement paste is solidified again, Prevents direct contact with tiles. After demolding, by washing the tile surface with an alkaline solution, the emulsion is dissolved therein and rinsed with the mixed cement paste.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 (a) to 1 (d) show a procedure for constructing a prefabricated tile according to the present invention. First, as shown in FIG. A large number of tiles 1 divided by resin joint materials 12
The tile sheet 16 in which 4 is arranged is laid.

The tile sheet 16 constitutes a so-called tile unit, and the sheet 16 is a state in which the surface of the tile 14 is preliminarily divided on the surface thereof by the joint material 12 with an adhesive material or the like. Is laid on the bed 10.

The joint material 12 is made of a synthetic resin elastic molded body or the like, and partitions the tiles 14 at predetermined intervals to prevent cement paste from entering between the tiles 14 and, at least, as a packing. Also has the function of.

Further, a polymer emulsion layer 1 is formed on the joint surface between the tile sheet 16 and the joint material 12 and the tile 14.
8 is interposed and covers the surfaces of the joint material 12 and the tile 14. Although not shown, the polymer emulsion layer 18 may be interposed between the joint material 12 and the tile 14.

The polymer emulsion layer 18 is made of a resin which is insoluble in water and soluble in alkali.
Copolymers of organic compounds containing unsaturated groups such as methyl methacrylate and organic acids containing unsaturated bonds such as acrylic acid (JP-B-57-14285), resins such as silane-based water-absorption-preventing agents And is applied to and covers each surface prior to assembly into a tile unit.

After the above installation work, as shown in (b),
Concrete C is placed inside the formwork. After the casting, when the cement paste in the concrete C flows from the gap between the joint material 12 and the tile 14 to the surface side, the cement paste dissolves the polymer emulsion layer 18 and between the surface of the tile 14 and the sheet. It exudes.

Polymer emulsion layer 18 once dissolved
In accordance with the solidification of the concrete C, the cement paste is taken in and dispersed therein, and the cement paste is solidified again. After the concrete C is solidified and released from the mold, the back surface of the tile 14 adheres the joint material 2 to the surface of the concrete C at a predetermined depth along the laid shape. Next, when the sheet 16 is peeled off and the joint material 12 is removed, the polymer emulsion layer 18 incorporating the leaked cement paste remains on the surface of the tile 14 as shown in (c).

In this state, it seems that the cement paste itself is directly attached to the surface of the tile 14 at first glance, but it is not actually attached, and the surface of the tile 14 is attached to the film of the polymer emulsion layer 18. However, it is isolated from the cement paste.

Therefore, by washing this surface with alkaline water, the polymer emulsion layer 18 is dissolved and washed away, and the cement paste mixed in the inside is also removed at the same time.

The alkaline water used for cleaning is an aqueous solution of a caustic soda solution, a commercially available alkaline detergent, etc., and is alkaline, so that it is harmless to the concrete C and inhibits adhesion to the concrete itself or the tile 14. Surface treatment is completed without any.

After that, the surface is washed with water to remove the alkali content, so that the PC plate in which the tile 14 is integrated with the surface of the concrete C is completed as shown in FIG.

In the above embodiments, the unitized tiles were applied to the PC plate through the tile sheet, but when the large tiles were to be annexed, the tiles were directly attached to the formwork bed. In this case, the polymer emulsion layer may be interposed between the tile and the joint material and the bed.

[0022]

As described above in detail with reference to the embodiments, in the surface treatment method for the pre-applied tile in the PC plate according to the present invention, the cement paste leaked to the surface side of the tile dissolves the polymer emulsion, Since the cement paste is taken into the inside and solidified again in a state of being mixed with the cement paste, by washing the tile surface with an alkaline solution after demolding, the emulsion is dissolved in this and washed off together with the mixed cement paste.

Therefore, in the present invention, since the cement paste does not directly adhere to the surface of the tile, a more reliable surface treatment can be performed as compared with the physical forced removal means by jet water flow and the surface treatment method such as pickling. It is also possible to prevent deterioration of concrete itself and deterioration of adhesive strength with tiles.

[Brief description of drawings]

1 (a) to 1 (d) are explanatory views showing a tile pre-positioning procedure according to the method of the present invention.

2A and 2B are explanatory views showing a tile pre-adding procedure and a defect thereof according to a conventional method.

[Explanation of symbols]

 10 Formwork bed 12 Joint material 14 Tile 18 Polymer emulsion layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masahiro Asami, 570-22 Himekawahara, Arai City, Niigata Prefecture (72) Inventor, Moriichi Moriichi, 1-10-4 Minamidai, Kawagoe City, Saitama Prefecture Within Shokubeton Japan Co., Ltd. (72) Inventor Masao Kawahara 1-10-4 Minamidai, Kawagoe City, Saitama Prefecture In Shokubeton Japan Co., Ltd. (72) Inventor Miki Aoyama 4-640 Shimoseido, Kiyose City, Tokyo (72) Inventor Obayashi Corp. Research Institute (72) Inventor Hayashi Original 4-640 Shimo-Seido, Kiyose-shi, Tokyo Inside the Obayashi Technical Research Institute, Inc. (72) Inventor Haruka Haruka, 4-640, Shimo-Seido, Kiyose-shi, Tokyo Inside the Obayashi Technical Research Institute (72) Inventor, Ito Mitani Kiyose, Tokyo 4-640 Ichishita-Seido, Obayashi Technical Research Institute Co., Ltd.

Claims (2)

[Claims] 1. A mold bed provided on the inner surface of a formwork is laid with a large number of tiles through a joint material, after which concrete is placed inside the formwork, and after solidification, the mold is removed. In the method of adhering a tile to a PC plate surface along the spread shape, the surface of the tile is previously coated with a water-insoluble and alkali-soluble polymer emulsion, and after the demolding, the surface of the tile is treated with an alkaline solution. A surface treatment method for a pre-tiled tile in a PC plate, which comprises washing. 2. The method for surface treatment of a pre-tiled tile in a PC plate according to claim 1, wherein the surface of the joint material is coated with a water-insoluble and alkali-soluble polymer emulsion.