JPS60244502A - Manufacture of pc board to which large-sized thin ceramic board is pointed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to a method for manufacturing a PC board (precast concrete board) having a large thin ceramic board attached to the surface in advance.

(Problems with the invention and its features) Due to the difficulty in controlling distortion, only small-sized ceramic plates were put into practical use, but recently it has become possible to produce lightweight, large-sized thin-walled ceramic plates, and they are now being used as building materials. It has become.

When this size of thin-walled ceramic board is used for surface finishing, in addition to the advantages of conventional tiles, there are also advantages such as fewer joints and continuity of the wall surface. 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. A PC equipped with this large thin ceramic plate
Since the board 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 object of the present invention is to provide a method for manufacturing a PC board pre-attached with a large thin-walled ceramic board, which is integrated into the PC board and can be manufactured with extremely low risk of damage due to stress or external force as described above. Its structural features include the process of spraying an adhesive with high adhesion and force-absorbing properties onto the flat back side of a large thin-walled ceramic plate, and adding combs to the adhesive layer at appropriate stages during the drying process. In other words, the present invention includes the steps of laying a plurality of large thin ceramic plates in a formwork with their back sides facing up, and pouring concrete on top of the joints after appropriate joint treatment. In the first step, a highly adhesive and force-absorbing adhesive is sprayed onto the flat back side of a large thin-walled ceramic plate.
Moreover, by adding combs to this adhesive layer, the large thin-walled ceramic plate and the concrete are integrally bonded, and the stress and external forces generated due to the characteristics of the concrete are absorbed between the large thin-walled ceramic plate and the concrete. It is made so that layers are formed.

In the present invention, it is not necessary to perform the first step and the second step clearly, and in short, the required adhesive layer must be formed on the back surface of the large thin ceramic plate at the stage of pouring concrete. For example, the first step may be carried out at the stage when the large thin ceramic plate is placed in the formwork.

The adhesive used in the present invention can be a cement-rubber composite type that has cement powder as the main ingredient and cationic SBR latex as a hardening liquid. It is of course possible to use other adhesives that are equivalent to or better than.

(Explanation with reference to drawings) In the drawing, 1 is a large thin ceramic plate having dimensions of, for example, 60Q x 60OX7, 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 on the back surface of the large thin ceramic plate 1 in the first step is, for example, 4I+Il++, 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, for example, 4I+Il++. Appropriate layer thickness is about half of the layer thickness of The ceramic plates 1 are laid out in the formwork 4 with their back sides facing up, and temporary joints 5 made of polyethylene foam are applied to the joints between the adjacent large thin ceramic plates 1 and 1 at the front and back, and joint mortar 6 is further applied if necessary. After that, concrete 7 is poured.

(Effects) As is clear from the above explanation, according to the present invention, a product of unprecedented quality can be obtained, and its practical effects are extremely large.

[Brief explanation of the drawing]

Figure 1 is a side view of a large thin ceramic plate that has been subjected to the first process.
FIG. 2 is a partial sectional view showing the final stage of the second step. In the figure, l...Large thin ceramic plate, 2...Adhesive layer, 3
... Comb, 4... Formwork, 7... Concrete. Patent applicant: Fudo Kenken Co., Ltd. Figure 1] Figure 2

Claims (1)

[Claims] The process involves spraying an adhesive with high adhesion and force absorption properties onto the flat back side of a large thin ceramic plate, and adding combs to the adhesive layer at appropriate stages during the drying process. A method for producing a PC board pre-attached with a large thin-walled ceramic board, which includes the steps of installing the PC board with the back side facing up in the formwork, and, after appropriately treating the joints, pouring concrete thereon. .