JP2007327282A - Water-permeating paving material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-permeating paving material which retains water permeability to some extent, and suppresses an increase in the temperature of the ground surface without depending on the nature of soil on the bottom side. <P>SOLUTION: A cement mixture containing coarse aggregate such as gravel and crushed stones, and cement at a volume percentage of 35 to 55% is blended with a water retainer at a volume percentage of 40 to 60%, and is mixed with water, then is solidified. The water retainer includes tile crushed grains 2 which is an industrial waste, a high-moisture-absorbing resin 5, and a zeolite 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a permeable laying body laid on a sidewalk, a roadway, a garden, and the like, and particularly relates to a permeable laying body made of a material having both water permeability and water retention.

In recent years, a water-permeable laying body having a structure in which moisture penetrates into the ground is laid on a sidewalk or a roadway. Such a water-permeable laying body is generally made by mixing cement with coarse aggregates such as gravel and stone, and forming voids with random sizes and shapes inside the cement (Patent Document 1, etc.) ). By providing a permeable structure to the laying body in this way, rainwater during precipitation can penetrate into the ground, so by evaporating the water stored in the ground, especially in the hot summer season The rise in the surface temperature can be suppressed.
Japanese Patent Laid-Open No. 10-218680

  However, in recent years, there has been a tendency for torrential rains in urban areas to intensify due to the heat island phenomenon, and in the event of torrential rains, if all rainwater has penetrated into the ground through the permeable construction, It can lead to flooding.

  On the other hand, a water-permeable laying body is not only laid on a sidewalk or a roadway, but also laid on a doorway, a garage, or concrete in a garden. However, if a permeable laying body is laid on such concrete, water cannot permeate the concrete, so that all rainwater flows on the concrete, and an increase in surface temperature cannot be suppressed.

  Therefore, a first object of the present invention is to prevent an increase in the surface temperature of such a water permeable construction body while ensuring a certain level of water permeability and without depending on the underlying geology. The object is to provide a permeable laying body.

  Moreover, when manufacturing such a water-permeable laying body, it is desired to utilize industrial waste effectively as much as possible from the viewpoint of recycling industrial waste. For this reason, when water permeability is given to the water permeable laying body, it is desirable to be able to effectively utilize waste materials having a water retention function among industrial wastes.

  Therefore, a second object of the present invention is to provide a water permeable laying body that can effectively use industrial waste as much as possible in the water permeable laying body having both water permeability and water retention. Is.

  That is, in order to solve the above-described problem, the water-permeable laying body according to the present invention includes a water retention material in a volume ratio with respect to a cement mixture containing 35 to 55% of a coarse aggregate such as gravel and crushed stone and a cement in a volume ratio. It contains 40% to 60% and is made to compact after mixing with water.

  If the water retaining material is included in the component in this way, rainwater during precipitation can be accumulated in the permeable laying body. Can be suppressed. Moreover, even when such a water-permeable laying body is laid on the ground with poor water retention, such as concrete, rainwater can be retained by the water retaining material, and the moisture can be vaporized. An increase in surface temperature can be suppressed.

  Moreover, in another invention, in order to solve a 2nd subject, 40%-60% is included by the volume ratio of the grinding | pulverization particle | grains of the tile which is a water retention material.

  Generally, roof tiles are treated as industrial waste. However, if such roof tiles are pulverized and used as a material for a water-permeable laying body, industrial waste can be recycled. Moreover, since the roof tiles are porous, they have a water retention effect, and if this is used as a material, the water retention effect can be improved.

  Furthermore, 1% to 2% of a high moisture absorption resin is included as a water retention material in the whole volume ratio.

  Thus, if a high moisture absorption resin is included in the water-permeable laying body, the water retention effect can be dramatically improved.

  Furthermore, such a water-permeable laying body is made to contain 1% to 2% of zeolite in the whole volume ratio.

  If zeolite is contained in this way, it will be possible to remove harmful substances, improve water quality, remove nitrogen oxides, etc. by the adsorption function, ion exchange function, and catalytic activity function inherent in zeolite. .

  In addition, such a water-permeable laying body is formed into a block shape, and a pointed portion protruding in a tapered shape is provided at the center portion on the bottom surface side of the block.

  In general, when a load is applied to a rectangular block from the top, the load concentrates in the central part, so cracks do not occur in the central part, but if the central part is thickened in this way, It becomes possible to prevent cracks and the like.

  According to the present invention, a cement mixture containing 35% to 55% by volume of coarse aggregate such as gravel and crushed stone and cement is contained in a volume ratio of 40% to 60%, and water is mixed therein. Therefore, rain water during precipitation can be accumulated in the permeable laying body. As a result, it is possible to control water outflow during torrential rains, to prevent rivers from increasing and flooding, and to vaporize the water accumulated in the water retaining material even when laid on concrete. The rise in surface temperature can be suppressed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view, a bottom view, and a side view of a water permeable block 1 in the present embodiment, and FIG. 2 is a schematic sectional view thereof. FIG. 3 is a view showing a state when the crushed grains 2 of the tile existing on the surface of the water-permeable block 1 are worn and the coarse aggregate 3 is exposed.

  The permeable block 1 in this embodiment is laid side by side on a sidewalk, a roadway, a garden, a doorway, and the like. For example, the vertical and horizontal dimensions of 30 cm to 35 cm and the thickness dimension of 6 cm, which are large enough for an operator to carry with bare hands. The size is about 10 cm. On the bottom surface side of the water-permeable block 1 having a square shape, a tapered pointed portion 10 is provided with a central portion protruding about 1 cm to 2 cm as compared with the surroundings. The thickness of the pointed portion 10 is reduced. By making it thicker than the surroundings, cracks from the central portion can be prevented even when a bending moment is generated in the central portion.

  Such a water permeable block 1 includes, as its components, crushed particles 2 of tiles, coarse aggregates 3 such as gravel and crushed stone, cement 4, water, high moisture absorption resin 5, zeolite 6 and the like.

  The pulverized particles 2 of the tile are those obtained by pulverizing the tiles of the demolished house and unnecessary tiles, and having a size of about 3 mm to 15 mm. Usually, the roof tile is fired at a low temperature of 700 to 1000 degrees or less, and at that time, a pore is formed to have a water absorption effect. For this reason, if the roof tile which has such a water absorption effect is included as a component, the water-permeable block 1 can have a water retention effect. But on the other hand, roof tiles are hard and brittle. For this reason, if the crushed grains 2 of the roof tile are included as a component of the water permeable block 1, there is a possibility that the surface of the water permeable block 1 will be indented due to wear from the surface due to the treading pressure of a person or a car. For this reason, the coarse aggregate 3 such as relatively hard gravel and crushed stone is contained in a volume ratio of 25% to 55%.

  The coarse aggregate 3 such as gravel and crushed stone is similarly pulverized to a size of about 3 mm to 15 mm in diameter, and gives strength to the entire water-permeable block 1 and wear of the crushed particles 2 of the tile. This prevents the surface of the water permeable block 1 from being shaved. If the crushed particles 2 of the tile are exposed on the surface side, the crushed particles 2 of the tile will be gradually scraped due to human walking or traffic of the automobile, etc. As shown in FIG. 3, the surface of the coarse aggregate 3 such as gravel or crushed stone is exposed, and in this state, the surface is prevented from being worn by the coarse aggregate 3 that is resistant to wear. The coarse aggregate 3 is mixed with the cement 4 and contained in an amount of about 35% to 55% with respect to the volume ratio of the entire water-permeable block 1. By mixing at such a ratio, it becomes possible to provide a balance between the prevention of surface wear in the coarse aggregate 3 and the water retention effect of the water retention material.

  Further, the water permeable block 1 includes a high moisture absorption resin 5. As the high moisture absorption resin 5, a resin having a high water holding power, a low quick drying property, a moisture which is not released by a stepping pressure, and a low expansion coefficient is preferably used. For example, as the high moisture absorption resin 5, a resin containing a polyacrylate used as a paper diaper or a sanitary product is used. This resin has the ability to absorb water 200 to 1000 times its own weight, and the water once absorbed hardly releases even when external pressure is applied. For this reason, it uses suitably for the water permeable block 1 laid in the ground. In addition, not only such polyacrylic hydrochloric acid but other resins can also be used.

  Furthermore, in this embodiment, the zeolite 6 is contained as a component of the water permeable block 1 in a volume ratio of 1% to 2%. The zeolite 6 has an adsorption function, an ion exchange function, a catalytic activity function, and the like, and can have effects such as adsorption of harmful substances, deodorization, purification of water quality / exhaust, and water retention by the adsorption function. Moreover, it is possible to neutralize acidity by the ion exchange function, to improve the soil and to remove ammonium ions, and to remove nitrogen oxides in the air by the catalytic activity function. .

  Such crushed tile particles 2, coarse aggregate 3, high moisture absorption resin 5, zeolite 6 and the like are formed as a cement mixed material mixed with cement 4, and after being kneaded with water, Pour into the mold. And it presses with a press from the up-down direction, and is compacted.

  In the water-permeable block 1 thus compacted, a gap is partially formed by the crushed particles 2 of the roof tiles and the coarse aggregate 3. This gap allows rainwater or the like to permeate downward and allows water to permeate to the bottom side. Moreover, since this void is filled with concrete containing a water retention material, it is possible to store moisture when permeated by the water retention material. The stored moisture is gradually vaporized as the surface temperature rises, and the rise in the surface temperature can be suppressed by the heat of vaporization.

  As described above, in this embodiment, since the crushed particles 2 of tiles are used as the water retaining material, industrial waste can be recycled, and the environment-friendly water permeable block 1 can be obtained. it can.

  Furthermore, since the high water absorption resin 5 is included as a water retaining material, it is possible to store water at a rate of 500 cc with respect to 1 to 10 g of powder, and to suppress an increase in surface temperature. it can. In addition, it plays a role as a water storage tank during torrential rain, and can prevent rivers from increasing or flooding.

  Furthermore, since such a water-permeable block 1 contains zeolite 6 by volume of 1% to 2%, not only can the water be retained by this zeolite 6, but also deodorization, purification of water quality, nitrogen Oxide removal and the like can be performed.

  In addition, this invention is not limited to the said embodiment, It can implement in a various aspect.

  For example, in the above embodiment, the square permeable block 1 is described as the permeable laying body, but is not limited to such a square shape, and may be a triangular shape, etc. The present invention can also be applied to a laying body that is continuously provided on a road.

  Further, in the above embodiment, the crushed particles 2 of the tile, the high moisture absorption resin 5, the zeolite 6 and the like are used as the water retaining material, and in particular, a large amount of water is stored by the high moisture absorption resin 5. You may make it raise water retention effect using materials other than.

  Furthermore, in the said embodiment, although the pointed part 10 which protruded in the bottom face side is provided, it is good also as a planar shape on the bottom face side, without being limited to such a shape. In the case of a flat shape, the rattling with the concrete can be reduced when laying on the concrete.

The top view of the water permeable block in one embodiment of this invention, a bottom view, a side view Schematic cross-section in the same form The figure which shows a state when the grinding | pulverization grain of the tile in the same form is worn out

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Water-permeable block 2 ... Crushing grain 3 of a tile ... Coarse aggregate 4 ... Cement 5 ... High moisture absorption resin 6 ... Zeolite 10 ... Pointed part

Claims (5)

  A cement mixture containing 35% to 55% of coarse aggregate such as gravel and crushed stone and cement in a volume ratio contains 40% to 60% of a water retention material, mixed with water and compacted. A permeable laying body, characterized in that   A cement mixture containing 35% to 55% of coarse aggregate such as gravel and crushed stone and cement in a volume ratio contains 40% to 60% of crushed particles of tile and mixed with water for compaction. A water-permeable laying body, characterized in that   The water-permeable laying body according to claim 1 or 2, wherein the water-retaining material contains a high-moisture-absorbing resin in a volume ratio of 1% to 2%.   Furthermore, the water-permeable laying body of Claim 1 or 2 which contains zeolite 1 to 2% by volume ratio. The water-permeable laying body according to any one of claims 1 to 4, wherein the water-permeable laying body forms a block body, and a pointed portion projecting in a tapered shape is provided at the center of the bottom surface of the block body.

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