JPS5948777B2 - Manufacturing method of thick tiles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing thick-shaped presses, and more particularly to a method for producing thick-shaped presses molded using cement as a main component.

Conventionally, it has been widely used to form flat roofing materials using hydraulic inorganic materials such as cement, but it is difficult to give a solid appearance to the roof with flat roofing materials. It has its drawbacks.

For this reason, attempts have been made to mold tiles with undulating shapes like Japanese or Western tiles using the above-mentioned hydraulic inorganic materials, but these tiles usually have a flat wall thickness. It has the disadvantage that it is thicker and has a larger volume, making it heavier.

This is also the case with tiles molded and fired from clay, such as Japanese tiles, which have the disadvantage that the frame structure of the house must be made strong, or that it requires a great deal of effort and effort to transport.

In view of the above, the present invention is directed to the case where so-called thick-shaped tiles having a undulating shape such as Japanese tiles or Western tiles are molded using a hydraulic inorganic material such as cement.

The first invention was made with the aim of making it lighter than the conventional one, and the first invention was made to have a weight ratio of cement to silica sand, or cement/silica sand = 0.75 to 1.5. Add sand to material A so that the weight ratio of material A/sand is 40 to 60, and then add water to the entire mixture of material A and sand so that the weight ratio is 0.4 to 0.7. A second invention is a method for manufacturing a thick roof tile, which comprises adding and kneading to form a thick roof tile, and then subjecting it to high-temperature, high-pressure steam sound generation. Sand was added to material A with a cement/silica sand ratio of 20.75 to 1.5 so that the weight ratio of material A/sand was 40 to 60, and then the entire mixture with material A and sand was added. Water was added and kneaded to give a weight ratio of 0.4 to 0.7.

After forming a thick tile and performing primary curing, a white cement: silica sand: pigment nia, krylic emulsion is applied to the surface of the thick tile. 0.20):
Apply a paint mixed at a weight ratio of (0.1 to 0.8),
This is a method for producing a thick tile, which is characterized by drying, further applying an acrylic emulsion resin paint thereon, drying, and then curing with high temperature and high pressure steam.

Next, this invention will be explained.

In the method for producing a thick tile of this invention, the weight ratio of cement and silica sand is cement/silica sand = 0.75 to 1.5.
For material A, which is blended and mixed uniformly so that
Sand is added so that the weight ratio of material A/sand is 40 to 60, and the mixture is further mixed uniformly.

The silica sand in the above is added as an aggregate, and the reason why it is added in a larger amount than sand is to reduce the weight of the molding material, and the weight ratio of cement/silica sand is reduced to 0. The reason for setting the value in the range of .75 to 1.5 is that if the cement/silica sand ratio is less than 0.75, the amount of silica sand blended will be too large, and although the weight of the molded tiles can be reduced, the strength will be reduced. Also, if the cement/silica sand ratio is set to a value larger than 1.5, the amount of aggregate mixed will decrease, and if this amount is mixed, the weight of the tile will increase, making it difficult to reduce the weight. This is because it becomes difficult to achieve this goal.

Also, the reason why the blending ratio of material A and sand is set in the range of 40 to 60 is to minimize the weight of the sand blend, and the blending ratio is set to a value less than 40. If you do that, the weight of the tile will increase.

Also, if the blending ratio is greater than 60, the weight of the tile can be reduced, but the strength may not be sufficient.

Next, for the entire mixture of material A and sand, 0.4 to 0.
Add water and knead so that the weight ratio is 7.

The amount of water added is necessary and sufficient to give fluidity to the material when press molding or extrusion molding thick tiles.

In other words, if the water content is less than the above range, it cannot be expected that the material will have sufficient fluidity, and especially when extrusion molding is performed, a very large extrusion pressure will be required, and if the water content is more than the above range, the material will have poor fluidity. As a result, the molded body cannot maintain its shape sufficiently.

Then, a thick roof tile is formed from the mixed material obtained as described above by press molding or extrusion molding, and this is steam-cured under high temperature and high pressure.

In addition, when coloring tiles manufactured in the above manner, the press-molded or extruded thick tile is naturally cured until it reaches a hardening strength that can withstand post-processing, and then white cement is applied to the tile surface. Silica sand: Pigment Niacrylic emulsion l: (0,5-1.5): (0,05-0.20
): (0.1 to 0.8) by weight is applied as an undercoat and dried, then an acrylic emulsion resin paint is applied, dried, and then cured at high temperature and pressure.

In addition, the reason why white cement is blended into the undercoat paint in the above is to strengthen the strength of the paint film during high-temperature, high-pressure steam curing (autoclave) in the subsequent process, and at the same time improve the affinity between the undercoat film and the tile surface. This is to do so.

Furthermore, silica sand is added as an aggregate to the white cement, and is used in place of sand in order to reduce the weight of the coating film.

Next, a test piece (150 mm) obtained by the manufacturing method of the present invention
Tests were conducted on bending strength, water absorption rate, and specific gravity for 2mm (thickness)
The results shown in Figures A to C were obtained.

That is, Figure 1A shows the bending strength (kg/crIt), and shows the strongest range.

concentrated near the center of the graph.

The diagram in Figure 1 shows the water absorption rate (I), and it was found that the greater the amount of silica sand mixed with cement or sand, the lower the water absorption rate.

Figure 1C shows the specific gravity, and it was found that the greater the amount of silica sand mixed with the cement, the lower the specific gravity.

In consideration of these points A to C in FIG. 1, the blending range shown in FIG. 2 is the range that can achieve weight reduction and impart strength.

Next, strength and peeling tests were conducted on the coated film, and the results shown in the table below were obtained.

In the above table, C is white cement, G is pigment, E is emulsion, and the top coat is acrylic emulsion paint in an amount of 80 to 120 g.
/m3.

As described above, this invention uses a large amount of silica sand as aggregate, and employs steam curing using high temperature and high pressure in the curing stage. The weight of the material can be reduced, and at the same time, the strength can be improved.

Furthermore, even when painting thick roof tiles, since silica sand is mixed into the undercoat paint, the weight of the paint itself can be reduced, and these inorganic substances and organic substances mixed with it are
Because it exhibits sufficient affinity for the paint applied to the surface and upper layer of tiles, it has various effects such as increasing the strength of the paint film.

[Brief explanation of the drawing]

Figures 1A to 1C are graphs showing the test results of thick tiles obtained according to the present invention, and Figure 2 is a graph showing the most preferred blending amount according to the present invention.

Claims (1)

[Claims] 1 Weight ratio of cement and silica sand or cement/silica sand =
Sand was added to material A, which had a weight ratio of 0.75 to 1.5, so that the weight ratio of material A/sand was 40 to 60. Furthermore, for the entire mixture of material A and sand, 0.4
Water was added and kneaded to a weight ratio of ~0.7. A method for producing a thick press, which is characterized by forming a thick press and then curing it with high-temperature, high-pressure steam. 2 The weight ratio of cement and silica sand is cement/silica sand -
Sand was added to material A, which had a weight ratio of 0.75 to 1.5, so that the weight ratio of material A/sand was -40 to 60. Furthermore, for the entire mixture of material A and sand, 0.4
Water was added and kneaded to a weight ratio of ~0.7. After forming a thick tile and performing primary curing, a white cement:silica sand:pigment Niacrylic emulsion is applied to the surface of the thick tile. 20)
: A paint compounded in a weight ratio of (0.1 to 0.8) is applied and dried, and then an acrylic emulsion resin paint is applied and dried, followed by high-temperature and high-pressure steam curing. A method for manufacturing thick-formed presses.