JPS63194005A - Water permeable block - 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] <Industrial Application Field> The present invention relates to a porous block that has good water permeability and is mainly used for road pavement, and provides a block that does not impair water permeability even after long-term use. The purpose is to

<Conventional technology> When the road surface is paved, water permeability is impaired.

Rainwater does not penetrate into the ground, leading to problems such as trees becoming dehydrated and insufficient drainage.

Therefore, it is well known that a water-permeable block is used. As a means for imparting water permeability, it is common to use porous material. One example is the Tokuko Sho 6
There is No. 0-7082. This is obtained by kneading a 5-70 mesh viscosity fired product and a fired refractory with the same particle size, kneading it with a glaze, adding an appropriate coloring agent, compression molding, and firing. It is.

<Problems to be solved by the invention> Water-permeable blocks that have been proposed in the past, including this example, are made of uniform aggregate from the front to the back, and the porosity is not very large, and the main focus is on the passage of only water. was. Therefore, even when used for pavement, clogging gradually occurs with use, and this becomes more noticeable over time, resulting in impeding the water permeability function.

<Means to solve the problem> Therefore, we changed the idea of only allowing water to pass through, and created a structure that allows the passage of fine sand, etc. that can cause clogging, that is, inorganic aggregates with different particle sizes. We have developed a water-permeable block that is characterized by being unevenly distributed on the surface and back sides of the block. The uneven distribution referred to here is a state in which an inorganic aggregate layer with a small particle size (for example, 3 to 4 mm) exists on the front side, and an aggregate layer with a large particle size (for example, 6 to 12 I) exists on the back side. It means. Furthermore, it is also included in the idea of the present invention to interpose in the intermediate layer, if necessary, inorganic aggregate with a particle size intermediate between the inorganic aggregates of the surface layer and the back layer.

The Q-free material used in the present invention is selected from naturally available ores such as waxite, crushed bricks, crushed baked clay, etc. whose particle size can be adjusted to suit the purpose of the present invention. Select and use the one that suits you.

In order to unevenly distribute inorganic aggregates with different particle sizes on the front side and back side of the block, inorganic aggregate particles are combined with each other with voids formed, and any of the following methods is used to form a block. I can do it. In other words, there are methods for bonding grains by heating and firing them to their melting point using glaze, methods using inorganic adhesives such as cement, and methods for adhesion of inorganic and organic polymeric materials (e.g. phenolic resins and asphalt materials). can be used.

<Effect> No fif! - There are pores of about 1 to 10 of the particle size between the particles of the material, but by making the particle sizes unevenly distributed between the front and back sides of the block, The pore diameter differs depending on the side. This hole diameter is 4 to 4 on the back side.
Preferably, the diameter is five times as large, but since the pore diameters are different on the front and back sides, fine sand, fine sand, etc. can pass through along with water, and the water permeation function is not inhibited.

The present invention will be described in detail below with reference to Examples.

<Example 1> Inorganic aggregate waxite particles with a major axis of 3 to 4 m and waxite particles with a major axis of 10 to 12 mm were separately prepared.
It was coated with a glaze using an aqueous dispersion containing feldspar, silica, clay, and lime, and dried at 105°C so that 10% by weight of the glaze was deposited on it.

The obtained glaze-coated particles with a major axis of 3 to 4 are 61
Place it in the bottom of the mold so that it has a thickness of 1I11.

Next, glaze-coated granules having a major axis of 10 to 12++ ya were added so as to have a thickness of 60 mm, and pressure molded at a pressure of 50 kg/cJ. The obtained molded body was heated to 105 to 150°C.
The material was heat treated for 60 minutes at 1) is made of sintered small-diameter inorganic aggregate with a long axis of 3 to 4 m and a thickness of 5 m.
, the other back 1 (2) is made of sintered inorganic aggregate with a large diameter of 10 to 12IIll. In this way, inorganic aggregates with different particle sizes were unevenly distributed on the front side and the back side of the block, and the thickness was about 55 m.

This water permeable block was tested to see if its water permeability was reduced as follows. Place the side of the permeable block with the sintered inorganic aggregate of 3 to 4 holes and the small diameter holes (3) facing up, and add 50 g of river sand with a grain size of 0.15 to 0.20 m5 per 100 m on the top surface. They were laid out evenly, and banks were built around the edges to allow water to flow evenly. Pour 6Q of water from the top of this
Sprinkle in minutes, large diameter holes at the bottom of the permeable block (4)
The amount of water falling from the river and the amount of river sand contained in the water were measured. As a comparative example, we prepared blocks made with the same thickness using waxite inorganic aggregate with a total length of 3 to 4 m, and measured the amount of water falling to the bottom of the water-permeable block and the amount contained in the water under the same conditions. The amount of river sand was measured. The result is the first
Shown in the table.

Table 1 As is clear from Table 1, the water-permeable block of the present invention has a larger total amount of sand that passes through with water than conventional blocks with the same overall porosity, and is less likely to become clogged. result,
The result is that the amount of water permeation is always high until the end.

<Example 2> Inorganic aggregate waxite grains A having a major axis of 2 to 3 mm and waxite grains B having a major diameter of 5 to 6 mm were separately slurried with Portland cement in water. A cement coat layer was provided on the surface by immersing it in the solution. The weight ratio of portland cement to water is 100:10,
The adhesion amount of this cement liquid was 24.8% by weight for granules A and 17.1% by weight for granules B.

Next, when molding the block by placing it in a wooden mold, apply granular A cement coated material to the bottom part to a thickness of 6.0 m1tt.
Next, the granular B cement coated material was placed 58 m thick and pressurized from the top to make the thickness 60 mm.Next, it was left indoors for 7 days to remove moisture and proceed with the hardening reaction, allowing water to pass through. Got a sex block.

The resulting water-permeable block has strong adhesion between the inorganic granules, with a layer of granules A having a thickness of 51 TI11 on one surface layer (1), and a layer of granules B19 having a thickness of 55+ m on the back layer (2). It has become something like this. The sand passage efficiency of the water permeable block obtained in this example and the comparative example block obtained only with the grain A cement coated product was tested in the same manner as in Example 1. The results are shown in Table 2.

Table 2: Such permeable blocks can be used for road paving because sand particles, dust, organic matter, etc. that invade the surface can be transferred to the back surface by natural rainwater or water spraying.

Not only can it be used as paving stone blocks, but it is also useful when laid on surfaces that require water flow and ventilation functions, such as tennis court sides, pool sides, garages, gas stations, rooftop floors, and stair blocks. It is. Furthermore, when used as a floor material or as a lightweight block on a wall surface, it becomes an Efsteria material that reasonably maintains the transfer of dust to other surfaces and the smoothness of the surface.

<Effects of the Invention> Since the water permeable block of the present invention has the above-described structure, sand and dust can pass through it and good drainage can be maintained over a long period of time. Even when laid around trees, sprinkled water and rainwater efficiently permeates the ground, moisturizing the ground and maintaining a good growing environment for plants for a long time.

When used on pavement, water does not accumulate over a long period of time, allowing comfortable walking and driving. Since the inorganic aggregate can be colored with a glaze to the desired color, it is possible to provide color blocks according to needs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part of the water-permeable block of the present invention. (1) Surface layer (layer of sintered small-diameter inorganic aggregate) (2) Back layer (layer of sintered large-diameter inorganic aggregate) (3) Small-diameter pores
(4) Large diameter hole or larger

Claims (1)

[Claims] A water-permeable block characterized in that inorganic aggregates having different particle sizes are unevenly distributed between the surface layer side and the back layer side of the block.