JPH02279803A - Paving block - Google Patents

Abstract

PURPOSE:To improve water permeability and, at the same time, to make it hard to cause clogging load by forming a block of a material manufactured from ceramic powder having right and left sides, and up and down sides with visible outlines repeating a form inverting the right and left sides integer times. CONSTITUTION:Ceramic powder is formed into granules, and spherical aggregate which is so granulated that specific parts more than 95% of the whole are included in the extent of a specific grit within + or -50% of an average particle size is bound with flux. After that, a block is made of the material mentioned above having right and left sides 1 and 2 with visible outlines combining circular arcs with folding lines or circular arcs with straight lines, and up and down sides 3 and 4 with visible outlines repeating a form inverting the right and left sides integer times. The slenderness ratio is so made that it is practically an integer value. According to the constitution, the water permeability is improved, and the restorablity from clogging can be also improved as well as making it hard to cause clogging.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an interlocking pavement block with excellent water permeability.

(Prior art) Interlocking pavement blocks, which pave sidewalks, etc. by interfitting many blocks of the same shape and laying them on the road surface, have been known for a long time and have already been put into practical use. There is. However, since conventional road blocks of this type were usually made of cement, they had the drawback of poor water permeability, as rainwater could only flow downward through the joints.

Recently, materials containing amorphous aggregates such as cement and crushed stone, resin and crushed stone, and Cerben and resin have been developed, but these tend to clog in a relatively short period of time, and they also become clogged by water washing, rainwater, etc. In addition to poor clogging properties, when resin was used, there were problems with weather resistance and chemical resistance. Furthermore, since many of these types of road flocks are colored only on the particle or block surfaces, the colored parts on the surface tend to fade, making it difficult to create subtle color combinations.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides a road block that has excellent properties such as water permeability, clogging recovery, and strength, and does not fade. It was completed for cleaning purposes.

(Means for Solving the Problems) The present invention, which has been completed to solve the above problems, has two left and right sides having an outline that is a circular arc, a broken line, or a combination of a circular arc and a straight line, and The powder has two upper and lower sides with an outline that is an inverted shape repeated an integral number of times, the ratio of the vertical and horizontal dimensions is a multiple of the above-mentioned integral number, and the material is ceramic. It is characterized by being water-permeable and made by bonding spherical aggregates that are sized so that 95% or more of the total is contained within a particle size range of 1.5% or less.

As mentioned above, the pavement block of the present invention is of an interlocking type with a vertical and horizontal dimension ratio of an integral multiple,
For example, it has a shape as shown in FIG. In the example in Figure 1, iZ! on the right side! (1) has a shape in which the center of the outline bulges outward in a triangular shape, and the left side (2) has a shape in which the center of the outline is depressed inward in a triangular shape. Also, the upper and lower two sides (3), (
4) is an integer multiple of the shape obtained by inverting the left and right outlines, in this case, the outline is repeated twice, that is, the upper side (
3) is a triangular shape with two inward concave outlines,
The lower side (4) has two triangular outlines that bulge outward. Therefore, if they are arranged so that they are oriented 90 degrees to each other as shown in the figure, the two upper and lower sides (3) and (4) of the adjacent pavement blocks will be the two left and right sides (1), (2) and 1: They fit together at a ratio of 2, forming a continuous paved surface. Note that (5) is a non-slip layer formed on the surface of the pavement block as necessary. The shape of the outline of each side is not limited to this, and may be, for example, a combination of circular arcs and straight lines, or a shape consisting of repeated circular arcs.

As shown in the examples below, the material of the pavement block of the present invention is a spherical aggregate obtained by granulating and sizing ceramic powder and bonding it with an inorganic flux, and its particle size distribution is determined by the average particle size. The total particle size within ±50% of
It is designed to contain 5% or more. Spherical aggregates with uniform particle size are in a state close to point contact with each other, and the size and distribution of the pores formed between them are almost uniform, making it easy for water etc. to pass through. It has become. Moreover, in the present invention, the surface of each spherical aggregate is a smooth surface coated with flux and vitrified, so it has excellent water permeability and is free from clogging due to dust, clumps, and other fine foreign matter. In addition, even if clogging occurs, it can be easily cleared by washing with water or the like.

If you use a flux with a coefficient of thermal expansion that is almost the same as that of the spherical aggregate, both will expand and contract together, and if you use a flux with a coefficient of thermal expansion that is smaller than that of the spherical aggregate, you will be able to make ceramics after firing. Compressive stress acts on the spherical aggregate, and in any case, the occurrence of cracks due to internal stress is prevented by the same action as the compressive axis.

Therefore, it has high strength and there is no risk of breakage even when used as a pavement block under bending load.

In addition, as shown in Figure 2, a surface layer (6) made of ceramic spherical aggregate uniformly colored from the inside with a smaller average particle diameter obtained by mixing colored pigments in the raw materials.
If it is integrally molded on the surface of the large-grain base material layer, this surface layer (6) prevents dirt and the like from entering into the interior, resulting in a more reliable clogging prevention effect. Furthermore, the surface layer (6), which is colored from within the particles, has a beautiful appearance and can enhance the aesthetic appearance of the road. Since it is colored, it will not fade even if the surface is worn, and it has the advantage that a more subtle hue can be created by combining and mixing various blue particles in terms of surface color.

Next, the method for manufacturing pavement blocks of the present invention will be explained in detail according to Examples.

(Example) Example I Si, Oz 60-70%, 8 lio+ 20-
24%, K2O+NazO3, 5-5.5%, pez
O-12,0% or less, T i 0□1% or less 5CaOO
, 5% or less, 11g00.5% or less, Iglog35.
Ceramic raw materials and sludge are mixed to have a composition of 5 to 9.5%, pigment as a coloring agent is added, and the water content is 12 to 18%.
%, water is added and kneaded, and the diameter is 0.
A certain value of 6-51nIn, for example 2. It was extruded into a noodle shape with the diameter of Orye. This was cut and granulated using a granulator, and the particle size was adjusted until the average particle size was 2.0.
95% or more of the total was included within ±50% (within the range of 1.0 to 3.OM). This was packed into a pod and fired at a temperature of 1100 to 1300'C to obtain a spherical aggregate. Its coefficient of thermal expansion is 0.46×10-'-0°54×10-'/'C (40-650°C). 100 to 20 parts by weight of an inorganic flux and 2 to 3 parts of a shape retaining agent such as polyvinyl alcohol are mixed with 100 parts by weight of such R and F-shaped aggregates, and the mixture is pressed in a mold while being vibrated. It was molded and shaped into a block. Flux is 5i0260~70%, AlzOs 15~2
0%, K, 0 + Na2020~30%, CaO + Mg
0 1 to 5% composition, its thermal expansion coefficient is 0.3
7X10 bow ~ 0.50 X 10-5/'C (40~6
50'C), which is smaller than the coefficient of thermal expansion of spherical aggregate. Such a molded body was fired at 1100 to 1300''C to obtain a pavement block having a length-to-width dimension ratio of substantially 1:2 as shown in FIG.

If these pavement blocks are arranged in a 1:2 ratio with each other oriented at 90 degrees as shown in the figure, they form a continuous pavement surface as interlocking blocks. In addition, the surface of each spherical aggregate in this pavement block is coated with flux, creating a smooth glass-like surface, and the pores formed between each particle are approximately uniform in size. It has excellent water permeability and extremely good recovery from clogging, and the surface and interior of each granule is uniformly colored and has high strength. In addition, in order to increase the slip resistance on the surface of the molded pavement blocks, it is possible to provide anti-slip protrusions (5) and to wipe off the flux, which is the glass component, on the surface of the molded blocks using a special machine. It is valid.

FIG. 3 is a graph showing the results of a water permeability recovery test for this pavement block and a comparative product. First, 90% clay slurry,
A mixture of 10% silica sand diluted 3 times with water is 34! /
A quantity of water of m111 was passed through four types of pavement blocks individually, and the water permeation time at each point was determined according to JIS A 54.
Measured based on t$ on 03. As a result, as shown in the left half of the graph in FIG. 3, the water permeation time gradually increased in each block, indicating that clogging occurred, but the degree of clogging was slight in the case of the present invention.

After that, clean water was repeatedly poured into each block at a rate of 240 m 1/10 ca (each time) for washing. As a result,
As shown in the right half of the graph, the pavement blocks of the present invention were quickly cleared of clogging, but the comparative product was unable to completely clear clogging.

Example 2 Si (h 60-70%, Alz (h 17-20%,
LO + NazO 5-7%, Feze 31.0% or less, T
i1t 0.6% or less, CaOO, 6% or less, MgO0
, 3% or less, Igloss 4 to 6%, and a pigment added as a coloring agent at a ratio of 5% or less.
Spherical aggregate containing 96% or more of the total within the particle size range (thermal expansion coefficient 0.46 x 10-S ~ 0.64
X 10-'/'C) was obtained. These spherical particles are kneaded with flux and filled into the bottom surface of the mold, and the top surface is filled with coarse spherical particles that do not contain color pigments, and then pressed while applying vibration, so that the average particle size is formed on the surface. A pavement block having the cross-sectional shape shown in FIG. 2 on which a colored layer (6) made of finer spherical particles was formed was obtained. This road block with a colored surface has excellent water permeability, and the colored layer (6) made of fine particles makes it difficult for dirt to get inside, and even if it becomes clogged with dirt, it can be washed away with water. It is possible to restore the clog.

In order to increase the slip resistance on the surface, anti-slip protrusions (5) may be provided, or a special machine may be used to wipe off the glassy flux on the surface of the molded body before firing.

In the above example, the spherical granulated particles are fired once to form an aggregate, and then mixed with flux and then filled into a mold.
Although we perform double firing, in which the product is fired again after molding, it is also possible to perform single firing, in which the granulated, unfired, dry spherical particles are mixed with flux, filled into a mold, and then fired. It is.

(Effects of the Invention) As explained above, the pavement block of the present invention is made by granulating ceramic powder and bonding spherical particles with a uniform particle size by flux, so the size of the pores and The distribution must be uniform, the ceramic particles that contain a coloring agent and are uniformly colored throughout are in a state close to point contact with each other, and the surface of each ceramic particle must be vitrified. For these reasons, it has good water permeability, is less prone to clogging, and is also excellent in recovering from clogging. Furthermore, the interlocking type bronc of the present invention having a shape with an integral multiple of the length and width dimensions can easily form a continuous and firm paved surface. Therefore, the present invention greatly contributes to the development of pavement blocks that have eliminated the problems of the prior art.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of the pavement block of the present invention;
FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a graph showing the results of a water permeability recovery test of the road block of the present invention and a comparative product. (1), (2): Two sides on the left and right, (3), (4): Two sides on the top and bottom.

Claims (1)

[Claims] The left and right sides have an outline that is a circular arc, a broken line, or a combination of an arc and a straight line, and the upper and lower sides have an outline that is an inverted shape of this outline repeated an integral number of times. The size ratio is an integral multiple of the above, and the material is spherical aggregate made by granulating ceramic powder and sizing so that 95% or more of the total is contained within a particle size range of ±50% of the average particle diameter. A pavement block characterized in that it is of a bonded water-permeable type.