JPS6220321B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a water-permeable pavement board and a method for manufacturing the same, and more specifically, to improving the functionality of pavement in order to improve walkability in rainy weather and the environment for plant growth. The present invention relates to a paving board that can maintain good water permeability and air permeability, and a method for manufacturing the same.

(Prior art and problems to be solved by the invention) Conventionally, in order to increase the durability of pavements, it has been recommended to use materials and structures with excellent watertightness. Expanded.

As a result, the majority of natural water, or rainwater, is difficult to return to the ground and is treated as surface drainage. These human-induced changes also cause negative ecological problems, such as depletion of shallow groundwater, which causes land subsidence, fatigue of the soil, and changes in the growing environment for plants. Additionally, because the pavement is impervious to water, people may experience poor walkability in rainy weather. That is, rainwater flowing on the road surface, puddles and splashing due to uneven road surfaces, etc. Particularly in the case of such surface drainage, if the amount of drainage is large, the drainage treatment capacity is lacking, which causes large puddles to form. On the other hand, increasing the wastewater treatment capacity requires a considerable amount of equipment, which is economically difficult.

One possible way to solve these problems is to allow rainwater to penetrate into the paving plates, and in recent years, permeable pavement technology using ceramic paving plates has also been developed.

By the way, as a ceramic plate, there is, for example, the plate of Japanese Patent Publication No. 1983-38536. In other words, this plate is made by crushing and sifting ceramic tiles into fine particles, kneading them with a heat-resistant binder such as water glass or glaze, shaping them, and firing them, and is used as a sound-absorbing plate. It is something that

However, in such ceramic plates, the crushed fragments are sieved into fine particles and are uniform, so the gaps between the particles are also very small, so it is difficult to use this plate as a paving board. Even when used, the drainage effect is not very good because water does not pass smoothly through the gaps between particles.
Moreover, there was a problem in that impurities such as sand could not be flushed out at the same time as the water.

In addition, since the plate is composed of fine particles of sieved debris, the surface of the plate is uniform, so even if this plate is used as a paving board, it cannot obtain an excellent non-slip effect. There was a problem.

Furthermore, since the above-mentioned plates are made by simply kneading ceramic fragments with a heat-resistant binder and forming them, the fragments and the heat-resistant binder do not firmly adhere to each other. Even when used as a board, a strong and robust paving board cannot be obtained, and there is a problem that separation of the crushed pieces and the heat-resistant binder may occur.

In any case, the above-mentioned plates were manufactured solely as sound-absorbing plates, and if they were used as paving plates, various problems such as those described above would occur.

In order to solve all of the above-mentioned problems, the present invention has been developed as a pavement board that is highly permeable and breathable while maintaining the functionality of the pavement, and a method for manufacturing the same. It has exceptional water permeability, reduces clogging caused by dirt, dust, etc., and has a good cleaning effect.
Furthermore, the purpose is to provide the surface with a non-slip function.

(Means for Solving the Problems) The present invention has been made to solve the above problems in order to achieve the above object, and the means for solving the problems are to solve the above problems. The crushed pieces 2 of the glass, the crushed glass pieces 3, and water glass are mixed together, press-formed, and fired at a firing temperature of 700°C or higher to form a paving board body, and the surface of the paving board body is formed into a rough surface. Moreover, the main body of the paving board has numerous pores formed therein.

In addition, the manufacturing method is characterized by stirring and mixing a large number of large and small irregularly shaped ceramic fragments 2, glass fragments 3, water glass, and a coloring material added as necessary, and then stirring and mixing them in the mold of a molding machine. Next, the poured mixture is press-molded to form a molded body 7, and then the molded body 7 is fired at a firing temperature of 700°C or higher for a certain period of time to thermally melt the glass fragments and water glass. The object of the present invention is to produce a water-permeable pavement board that adheres to ceramic debris and has a rough surface and numerous pores.

(Function) In other words, since the pavement board is made up of a large number of ceramic fragments of different sizes and shapes, the pores that occur between the fragments are also randomly sized and small.
Therefore, moisture such as rainwater passes through these pores smoothly, and since each crushed piece is covered with the water glass, moisture passes through the pores without being absorbed by the ceramic crushed pieces themselves. As a result, the water is quickly drained directly under the paving slabs, and the water permeability of the paving slabs is therefore significantly improved. Furthermore, fine foreign matter such as sand, dirt, dust, etc. is immediately discharged directly under the paving board from the random sized pores at the same time as water flows out, and coarse foreign matter other than the above impurities is inside the paving board. Since the foreign matter does not penetrate into the surface and adheres only to the relatively large pores on the surface, washing the paving board with water can remove the foreign matter that has adhered to the pores on the surface. It never occurs.

(Example) Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.

Fig. 1 is a perspective view of a paving board as an example, and Fig. 2 is a longitudinal cross-sectional view.
It is formed by press-molding a mixture of , a desired colorant and water glass, and then firing it, and its surface is fixed to each other by the crushed pieces 2, and is coated by thermal melting of water glass. Innumerable pores 5 of random sizes are formed between the large number of crushed pieces 2, .

The paving board 1 having the above structure is used by laying it on a sidewalk surface, for example, and since the broken pieces 2 are coated with water glass as described above, water is absorbed into the ceramic broken pieces 2. without being absorbed
While passing through the pores 5 between the crushed pieces 2, ..., it gradually penetrates the entire pavement board 1 from the surface layer A to the inner layer B, and further from the inner layer B to the back layer C, according to the positional change of the pores 5. After that, it will be immediately discharged directly under the paving board.

Therefore, the surface of the pavement board 1 can usually have a water permeability of close to 100%, although it depends on the rainfall intensity.
As a result, the problem of poor drainage, such as the formation of puddles due to surface drainage as in the past, has been resolved.

Furthermore, since the large number of ceramic fragments 2 are irregularly sized and small, the pores 5 between the fragments 2, etc. are also generated randomly in size, and therefore, fine foreign matter such as dirt, dust, sand, etc., enters the stomata at the same time as water flows out. Coarse particles that are difficult to be discharged from the paving plate 1 do not penetrate into the interior of the paving plate 1 and adhere to the relatively large diameter pores 5 on its surface. Such coarse foreign matter could be easily removed by washing the pavement board 1 with water, and the decrease in water permeation effect due to clogging could almost be eliminated.

Furthermore, since the surface 4 of the paving board 1 is formed into a rough surface by a large number of large and small irregularly shaped debris 2, even if a puddle forms on the surface 4 of the paving board 1 or it freezes, the rough surface 4 It has a non-slip effect and can improve walking safety.

Furthermore, when a desired recess 6 is formed on the back side of the paving board 1 as shown in FIG. 3, a part of the paving board 1 becomes thinner due to the recess 6, which further improves water permeability. The drained water collects in the recess 6 and has an excellent effect on the drainage surface.

Further, by forming the recesses 6 in this manner, the weight of the paving board 1 can be reduced, and it also has practical effects such as being economically inexpensive to manufacture.
Further, the shape of the recessed portion 6 is not limited to the embodiment described above, and, for example, it is also possible to form the back surface by continuously forming unevenness.

Next, to explain the manufacturing method of the paving board, first of all, in terms of volume ratio, 60% ceramic debris and 2 to 3 fine glass fritted debris.
% and water glass (concentrated aqueous solution of sodium silicate) at a mixing ratio of 10%, dilute this 2 to 3 times with water, stir and mix each, and pour this into the mold of the molding machine main body. , then pressure molded,
When this is demolded, the size is 300mm x as shown in Figure 4.
A molded body 7 of 300 mm x 30 mm thickness is completed. When this molded body 7 is then placed in a firing pot and fired at approximately 700°C for 1 hour, the glass fragments 3 that are its constituent molecules are thermally melted and adhere to each ceramic fragment 2, bonding the fragments 2 together. At the same time, the water glass is also thermally melted to cover each of the broken pieces 2.

The fragments 2 constituting the paving board 1 formed in this manner are randomly arranged on the surface in various irregular shapes, thereby exhibiting a non-slip function. Furthermore, the paving board 1 after forming is formed into a so-called millet-like shape, and countless pores 5 are formed between the crushed pieces 2 which are constituent molecules, and this produces a water permeation effect.

Furthermore, since water glass is mixed in, the water glass covers the crushed pieces 2 after firing, so that the water is not absorbed by the crushed pieces 2, but passes through the pores 5 and directly under the paving board 1. It will be quickly discharged and the water permeation effect will increase.

Moreover, the strength of the paving board 1 itself is maintained by thermally melting the broken glass pieces 3 by firing after molding.

As described above, since it is carried out by an extremely simple method of mixing, molding, and firing, it has advantages such as good workability, suitability for mass production, and manufacturing at low cost.

Furthermore, it is extremely easy to manufacture colored paving boards by adding a desired coloring agent when mixing materials such as ceramic fragments and glass fragments, which can be used to decorate sidewalks, etc. The effect can be increased. Further, the size of the crushed pieces 2 can be arbitrarily selected. In addition to the above-mentioned materials, it is of course possible to optionally mix reinforcing materials and the like.

Incidentally, the mixing ratio of ceramic fragments 2, glass fragments 3, and water glass is by no means limited to the above embodiment, and the mixing ratio of glass fragments 3 and water glass (sodium silicate) may be increased. For example, 80% by weight of glass fragments 3 and water glass may be mixed with 100% by weight of ceramic fragments 2, and in this case as well, the same water permeability effect as in the above embodiment can be obtained. . Therefore, there is no question about the mixing ratio.

(Effects of the Invention) As described above, the present invention involves mixing a large number of ceramic fragments of varying sizes, glass fragments, and water glass, press-forming the mixture, and firing the mixture at a firing temperature of 700°C or higher. The ceramic fragments are fixed by thermal melting of glass fragments and water glass to form a rough surface, and the paving board itself has countless pores, so there are gaps between the large and small irregularly shaped fragments. The pores that occur are also random in size,
Compared to the conventional ceramic plate, which is composed of fragments made of uniform fine particles that have been sieved, the gaps between the fragments are larger, and the water permeability effect is significantly greater than before. This has resulted in a particularly remarkable effect of improving the condition.

In particular, in the present invention, the pavement board is made up of a large number of irregularly sized fragments, and the pores between the fragments are formed in a random state of size. It flows out along with the water while passing through the pores, and has the advantage that it does not become clogged in the short term, unlike conventional coatings, and can maintain its water permeability effect over a relatively long period of time.

Furthermore, the surface of the paving board is made up of a large number of irregularly-sized fragments arranged randomly to form a rough surface, so the surface has a significantly better non-slip effect than conventional ceramic plates, and can be used on rainy days. It has the effect of improving walkability during freezing conditions.

Furthermore, since the water glass is fixed to the ceramic fragments by thermal melting, the ceramic fragments are covered with this water glass, so that moisture such as rainwater is absorbed by the ceramic fragments. Instead, it passes through the pores and is quickly discharged directly below the paving board.

Further, by thermally melting the glass fragments, the glass fragments are fixed to the ceramic fragments, and as a result, there is an advantage that the strength of the paving board is increased.

In particular, since ceramic fragments, glass fragments, and water glass are fixed to each other through press molding, the molded paving plates are much stronger and more robust than the conventional ceramic plates mentioned above. There are some advantages.

As described above, as a result of the present invention providing a paving board with extremely excellent water permeability, rainwater is absorbed into the inside of the paving board and drained on the surface of the paving board during rainfall. There are no more puddles or splashes on the roof, and walkability in rainy weather has been significantly improved.

Therefore, when such paving boards are laid on the floor of sidewalks and parks, they not only improve walkability during rainy days, but also improve water permeability and air permeability while maintaining the functionality of the pavement, in order to improve the environment for plant growth. There is a great practical effect of being able to obtain a rich paving board. Moreover, since the water permeability is good, wastewater treatment can be performed without installing large-scale equipment, and the economical effect is also particularly significant.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a paving board as an example. Figure 2 is a longitudinal sectional view of the same. FIG. 3 is a side view showing another embodiment. FIG. 4 is a front view of the molded body. 1...paving board, 2...crushed pieces, 3...crushed pieces, 4...
...Surface, 5...Stomata.

Claims (1)

[Scope of Claims] 1. A large number of ceramic fragments 2 of various sizes, glass fragments 3, and water glass are mixed and press-molded, and the glass fragments 3 and water glass are thermally melted to form the above-mentioned 700 to adhere to ceramic debris 2
The paving board body is formed by firing at a firing temperature of 0.degree. A water-permeable pavement board characterized by having countless pores 5,... formed therein. 2. The water-permeable pavement board according to claim 1, wherein the back surface of the pavement board body is an uneven surface. 3 A large number of large and small irregularly shaped ceramic fragments 2, glass fragments 3, water glass, and a coloring material added as necessary are stirred and mixed and poured into the mold of a molding machine, and then The mixture poured into the mold is press-molded to form a molded body 7, and then the molded body 7 is fired at a firing temperature of 700°C or higher for a certain period of time to thermally melt the glass fragments 3 and water glass. A method for producing a water-permeable pavement board, characterized in that a water-permeable pavement board having a rough surface and numerous pores 5, etc. is produced by adhering to the ceramic-based crushed pieces 2.