JPS6056863B2 - How to treat the base for ceramic tile construction - Google Patents

Description

[Detailed Description of the Invention] This invention is intended to provide stable adhesion that does not cause peeling during tile construction work in which ceramic tiles are bonded to a cement concrete base using a synthetic resin or rubber adhesive. This is the method.

Normally, a tile base made of cement mortar requires at least three weeks for the mortar to sufficiently harden and dry, and for the alkalinity (pH) of the cement to reach about 6 to 7.

If tiles using adhesive are pasted during this period, the adhesive will deteriorate rapidly due to excess alkali, and the adhesive will have ``blister'' cavities due to large amounts of moisture, resulting in extremely poor bonding conditions. The occurrence of internal stress due to large curing shrinkage is a major cause of tile peeling accidents. This invention aims to rationally improve the cause of peeling accidents by interposing a sheet-like material having an asbestos fiber layer on the surface between the tiles and the base mortar.

The technical feature of this invention is that it has an asbestos fibrous layer at each adhesive interface with the tile and the base.

Asbestos, as is known from asbestos slate, has extremely good adhesion to cementum, and since it is made of fibers, the bonding through physical ``interlocking'' makes the bonding conditions extremely stable. do.

Therefore, the sheet material laminated at the same time as the finishing of the base mortar constitutes the surface layer of the tiled base in a strong and stable state. Furthermore, asbestos material is known to have excellent electrochemical interfacial reactions at the interface with synthetic resin or rubber adhesives and to satisfy stable adhesive conditions. Another major feature of the present invention is that the sheet-like material has high elasticity and has the ability to absorb and disperse large displacement stress such as that caused by curing shrinkage of a concrete base. Examples of sheet materials having an asbestos fiber layer on the surface include those in which asbestos fibers are laminated on the surface of a glass fiber sheet, and those in which asbestos fibers are laminated on the surface of a synthetic resin sheet.

The treatment methods and tile construction conditions are illustrated below.

Figure 1 shows the state of the tile construction base, which is obtained by applying cement mortar 2 to the surface of a concrete frame 1 to finish the base, and then pressing and pasting a sheet material 3 with asbestos fibers on the surface. . FIG. 2 shows a state in which a ceramic tile 5 is pasted onto the base surface using an adhesive 4 such as a synthetic resin or rubber adhesive or cement paste after the construction base has hardened. Tiling work constructed in this way achieves extremely favorable bonding conditions by buffering or blocking the alkali from cement and excess water, which are fatal conditions for organic adhesives, with the intervening sheet layer. I can do it.

The inventors confirmed these effects based on the following experimental results.

Experimental result A: Ceramic tiles were attached to an air-dry base plate made of cement mortar using a synthetic com-based adhesive and cured for two weeks to create a test specimen, and the tiles were pulled while air-dry. The average adhesive strength was 6k91d, but the adhesive strength measured when the test mortar base plate was placed in water for 2 weeks was only 2k91cI.

B: A sheet with an asbestos fiber layer on the surface of the glass fiber sheet according to the present invention was pasted on a base plate made of cement mortar using cement paste, and two days later, tiles were attached using a synthetic rubber adhesive in the same manner as in A. The tensile adhesion strength of the tile (after making a test specimen and leaving it to air dry) was 6k91 on average.
cIt, but the adhesive strength in the wet state of water was 5k9.
It was 1 cIt or more, and almost no decrease in strength was observed.

C: The adhesive strength measured two weeks after tiling was applied to the mortar base surface using a synthetic resin adhesive two days after finishing the base mortar construction.The value was 2 to 3k91c.
T1, however, the tiles similarly pasted on the base by the method of the present invention showed high strength of 5 to 6 kg1d. As described above, this invention completes stable adhesive construction even in conditions where it was previously considered impossible to install tiles, such as when the substrate has high moisture content, high alkalinity, or large shrinkage displacement. It is possible to shorten the construction period and reasonably increase the safety level against peeling.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 illustrate the treatment method and tile construction of the present invention.

1... Concrete frame, 2... Cement mortar, 3... Sheet material with asbestos fibers on the surface, 4... Adhesive, 5・・・・・・
・Ceramic tiles.

Claims (1)

[Claims] 1. When constructing a ceramic tile construction base using cement mortar, a sheet-like material with asbestos fibers on the surface is attached to the surface of the mortar layer to create an integrated laminated finish.
How to treat the base for ceramic tile construction.