JPH0360284B2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field to which the Invention Pertains) The present invention relates to a PC with a large thin-walled ceramic plate pre-attached to its surface.
This invention relates to a method for manufacturing a board (precast concrete board).

(Problem to be solved by the invention and its characteristics) Traditionally, only small tiles for building materials were put into practical use because it was difficult to control the warpage and distortion that occurs during the firing process. It became possible to use it as a building material.

When this large thin-walled ceramic board is used for surface finishing, in addition to the advantages of conventional tiles, it has the advantage of having fewer joints and providing continuity on the wall surface, so it can be attached to a PC board in advance to create curtain walls, etc. However, there are the following problems in this case.

In order to ensure accuracy, large thin ceramic plates cannot be made with combs on the back due to manufacturing methods, and are manufactured with both front and back sides flat, making it difficult to attach them to concrete reliably. Since this PC board pre-attached with large thin-walled ceramic plates is a composite product, there is a risk of damage due to external forces such as stress and vibration caused by concrete creep, drying shrinkage, and thermal expansion.

The present invention provides a PC board pre-attached with a large thin-walled ceramic plate, which allows a product in which the large-sized thin-walled ceramic plate and the concrete body are reliably integrated and is extremely unlikely to be damaged by stress or external force as described above to be obtained. The purpose of this method is to provide a method for manufacturing a ceramic plate, and its structural features include spraying an adhesive with high adhesion and force absorption onto the flat back side of a large thin ceramic plate, and The process involves adding combs to the layers at appropriate stages during the drying process, laying multiple large thin-walled ceramic plates in the formwork with their backs facing up, and applying appropriate joint treatment, followed by pouring concrete on top. The point is that it includes the process of setting up.

That is, in the first step, the present invention sprays an adhesive with high adhesion and force absorption onto the flat back surface of a large thin ceramic plate, and by making combs in the adhesive layer, The large thin-walled ceramic plate and the concrete are integrally joined together, and a layer is formed between the large thin-walled ceramic plate and the concrete to absorb stress and external force caused by the characteristics of the concrete.

In the present invention, it is not necessary to clearly separate the first step and the second step, and in short, the required adhesive layer must be formed on the back side of the large thin ceramic plate at the stage of pouring concrete. For example, when a large thin-walled ceramic plate is laid in the formwork, the first
You may also perform the following steps.

The adhesive used in the present invention has a cement powder as a main ingredient, and a cationic adhesive as a hardening liquid.
A cement-rubber composite type adhesive with added SBR latex can be used, but it is of course also possible to use other adhesives whose adhesion and force absorption are equal to or better than this.

(Explanation with drawings) In the drawing, 1 is a large thin ceramic plate with dimensions of, for example, 600 x 600 x 7 mm, and both its front and back surfaces are flat. Then, an appropriate pattern can be printed on the surface if necessary.

The thickness of the adhesive layer 2 that is sprayed onto the back surface of the large thin ceramic plate 1 in the first step is, for example, 4 mm, and the depth of the combs 3 that are made on the surface of this layer 2 at appropriate times during the drying process is as follows. Approximately half the layer thickness is appropriate.

When the first process has already been applied to the large thin ceramic plates 1, the second process is the same as the conventional tile attachment method, in which the large thin ceramic plates 1 are laid out in the formwork 4 with their back sides facing up. Before and after that, a temporary joint 5 of polyethylene foam is applied to the joint between the adjacent large thin ceramic plates 1, 1, and after applying joint mortar 6 if necessary, concrete 7 is poured.

(Effects) As is clear from the above description, according to the present invention, it is possible to obtain an excellent product that has not been seen before, and its practical effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is a side view of a large thin ceramic plate subjected to the first step, and FIG. 2 is a partial cross-sectional view showing the state at the final stage of the second step. In the figure, 1...large thin ceramic plate, 2...adhesive layer, 3...comb pattern, 4...formwork, 7...concrete.

Claims (1)

[Claims] 1. Spraying adhesive with high adhesion and force absorption onto the flat back side of a large thin-walled ceramic plate, adding combs to the adhesive layer at appropriate stages during the drying process, and manufacturing multiple large thin-walled ceramic plates. A large, thin-walled ceramic plate is pre-attached, which includes the steps of: laying the ceramic plate with its back side facing up in the formwork, and, after applying appropriate joint treatment, pouring concrete on top of it.
How to manufacture PC boards.