JP2002272261A - Greening base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a greening base capable of sufficiently growing a plant and having a water purification function. SOLUTION: This greening base is obtained by mixing granular inorganic porous bodies with glass powder followed by baking and binding the granular inorganic porous bodies with each other with melted and solidified glass; wherein if the inorganic porous body has an ion exchange ability, water can be purified through passing water into the greening base since nitrogen (N) and phosphorus (P) components can be removed, and the greening base is made combined through setting a soil-holding layer on the top of the greening base and stuffing or depositing soil containing an organic binder in/on the soil-holding layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a greening base for planting plants, and more particularly to a greening base that can be arranged on an inclined roof.

[0002]

2. Description of the Related Art Planting a roof is widely used for heat insulation and decoration of the roof. As such a panel for roof greening, Japanese Patent Application Laid-Open No. 6-141670 discloses "a panel-shaped porous body made of a hard material such as ceramic and having a gap of about 1 to 2 mm in diameter. And a greening material mixed with a water retention material ”.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Laid-Open No. 6-141 is disclosed.
No. 670 describes only the "porous body made of a hard material such as ceramic" described above as "a porous body continuous throughout the whole body", and there is no further specific description. No configuration is shown for ensuring the growth of E. coli.

[0004] An object of the present invention is to provide a greening base on which plants can be grown sufficiently.

Another object of the present invention is to provide a greening base having a water purification function.

[0006]

The greening substrate of the present invention is obtained by forming a granular inorganic porous body into a disk shape and solidifying it.

[0007] The greening substrate is preferably one in which a granular inorganic porous material and glass powder are mixed, fired, and the granular inorganic porous materials are bound to each other by a glass that has been melted and solidified.

[0008] Such a greening base is suitable for growing plants because the roots of the plant easily enter relatively large voids between the inorganic porous bodies, and the inorganic porous bodies have functions of water retention and water purification.

When the inorganic porous material has an ion exchange ability, nitrogen (N) and phosphorus (P) components can be removed, so that water can be purified by passing water through a greening base. it can. Examples of the inorganic porous material having such ion exchange ability include zeolite, vermiculite, and Kanuma earth.

[0010] Phosphorus in water is converted into iron phosphate or calcium phosphate by incorporating a component capable of supplying iron ions and calcium ions, such as incinerated ash, garbage, limestone, and shells, which contain a large amount of iron, into the inorganic porous material. Can be fixed and removed.

In the present invention, the space between the inorganic porous bodies on the greening base may be filled with soil. In this case, by allowing the soil to contain an organic binder, it is possible to prevent the soil from running off due to rainfall and the soil from scattering due to wind.

In the present invention, a soil holding layer may be provided on the upper surface of the greening base, and soil containing an organic binder may be filled in the soil holding layer or deposited on the soil holding layer to form a composite greening base. . In such a complex greening base, the soil is sufficiently maintained, and the plant can be sufficiently grown.

[0013]

Embodiments of the present invention will be described below in detail.

As the granular inorganic porous material constituting the greening substrate of the present invention, zeolite, vermiculite, Kanuma earth, Masa earth, Akadama earth and the like are suitable. The average particle size of the inorganic porous body is preferably 0.5 to 10 mm, particularly preferably 2 to 5 mm. This inorganic porous material may be a material obtained by coarsely crushing a natural mineral and sieving it to the above particle size, or may be a material obtained by granulating and firing a finer particle than that and granulating it. Good.

When the inorganic porous material is zeolite,
Both N and P components can be removed. If the inorganic porous material is vermiculite, N can be removed, and if it is Kanuma soil, P can be removed. When the inorganic porous material is used to burn incinerated ash (eg, Fe ₂ O ₃ by 1% or more,
0% or more), iron scraps, limestone, shells, and other substances that supply iron ions and calcium ions, the P content can be removed as iron phosphate or calcium phosphate.

The incinerated ash and the like are mixed with powder or granules such as zeolite, vermiculite, and Kanuma soil,
It is granulated and fired to form a granular material. The incorporation ratio of incinerated ash etc. is 100 parts by weight of zeolite, etc., 5 to 20 parts by weight in the case of municipal waste incinerated ash, 1 to 15 parts by weight of iron scrap,
In the case of limestone and shells, the content is preferably about 5 to 50 parts by weight.

When the greening substrate is manufactured, glass powder is added to the inorganic porous body, heated to a temperature higher than the melting point of the glass, the glass is melted, and then cooled to solidify the glass. It is preferable to bind the inorganic porous bodies to each other by the solidified glass.

The glass is preferably a silicate glass such as sodium silicate glass and sodium borosilicate glass, but is not limited thereto. The glass may be new glass or waste glass. It may be a glass frit used for glaze. The average particle size of the glass powder is preferably from 10 to 2000 μm, particularly preferably from 10 to 50 μm. The compounding amount of the glass powder is preferably 5 to 100 parts by weight, particularly preferably about 20 to 50 parts by weight, based on 100 parts by weight of the inorganic porous material.

It is preferable that a void having an average of about 500 μm to 5 mm is formed between the granular inorganic porous bodies in the produced greening substrate.

The greening substrate thus manufactured has a side of 30-90.
It is preferably a square of about cm.

The space between the inorganic porous bodies on the greening base may be filled with soil containing an organic binder.
Such organic binders include starch, methylcellulose (MC), carboxymethylcellulose (CM
C) and konjac powder called "tobiko (flying powder)" are suitable. The amount of the organic binder to be added is preferably 10 to 30 parts by weight based on 100 parts by weight of dry soil.

[0022] A soil holding layer is provided on such a greening base filled with soil or a greening base not filled with soil,
The soil retaining layer may be filled with soil or soil may be deposited on the soil retaining layer. As the soil, the organic binder-containing soil described above is used to prevent runoff due to rainfall and scattering due to wind.

As the soil retaining layer, non-woven fabrics of mineral fibers such as palm mats, coconut mats, glass fibers and slag fibers formed by shaping palm or coconut tree fibers into a mat shape;
A sponge made of a soft synthetic resin such as urethane is suitable.
The thickness of the soil retaining layer is preferably about 10 to 50 mm. This soil holding layer has a function of preventing runoff and scattering of the soil because at least a part of the soil enters between the fibers or into a sponge hole or the like.

The amount of soil packed in or deposited on the soil holding layer may be determined as appropriate according to the type of plant.

As the plants grown on the greening base or the complex greening base, mosses such as Snagoke and Hygomosa, and sedums such as Mexican stonecrop, Tsurumannengusa and Sasasa stonecrop are suitable. The sedums are perennials, have a low height even when grown, and are suitable for growing on a roof.

[0026]

Example 1 100 parts by weight of vermiculite having a particle diameter of 1 to 3 mm and an average particle diameter of 2 mm was used with a glass frit PN-5425.
(Nippon Frit Co., Ltd.) (Average particle size 30 μm) 30
Parts by weight together with 80 parts by weight of CMC and mixing,
After being formed into a size of 15 × 15 × 3 cm and dried, 8
The greening substrate was manufactured by firing at 00 ° C. × 8 hours and then naturally cooling. There was an average gap of 1 mm between the vermiculite granules as the granular inorganic porous bodies of the greening substrate.

On this greening substrate, an organic binder compounding soil was deposited at a rate of ² g / cm ² while being plugged, and then a snake mushroom was planted. Here, as the organic binder, used was one in which flying powder was added at a ratio of 20 parts by weight to 100 parts by weight of soil (dry weight).

In the summer, this greening base is installed on the roof of a building, and treated water (N concentration 15 mg / L, P
(Concentration: 1 mg / L) was applied to the greening substrate at 10 L / m ² · da
Water was sprinkled at the rate of y. As a result, it was confirmed that Snagoke continued to grow smoothly until the following year. Further, when the quality of the water transmitted through the greening base was measured, the N concentration was 6 mg / L and the P concentration was 0.9 as an annual average value.
It was 8 mg / L.

Example 2 The composite greening substrate shown in FIG. 1 was manufactured using the greening substrate of Example 1. That is, in Example 1, the coconut mat 2 was spread to a thickness of 1 cm on the greening base 1 without clogging the soil, and the organic binder-containing soil 3 was placed thereon for 1 c.
m thickness. After planting Mexican stonecrop as a plant 4 at a rate of 50 / m ^{2 on} this complex greening base,
The same septic tank treated water was sprinkled at a rate of 10 L / m ² · day in the same manner as in Example 1 on the roof of a building. The Mexican stonecrop has grown steadily until the following year. The average water quality of the water that has passed through the complex greening base is 3.8 mg / L for N concentration and 0.98 m for P concentration.
g / L.

Example 3 The same test as in Example 2 was carried out except that zeolite was used in place of vermiculite and konjac tobiko was used in place of starch as an organic binder. As a result, Mexican stonecrops continue to grow steadily until the following year. In addition, the quality of the water that has passed through the complex greening base has an annual average N concentration of 3.5 m.
g / L and P concentration were 0.4 mg / L.

Example 4 20 parts by weight of limestone powder having an average particle size of 2 mm was added to 100 parts by weight of vermiculite powder having an average particle size of 2 mm by CMC8.
It was added together with 0 parts by weight and fired at 800 ° C. × 8 hours.
A test was conducted in the same manner as in Example 2 except that such a sintered body was used as the inorganic porous body. As a result, Mexican stonecrop continued to grow smoothly until the following year. The water quality of the water permeating through the composite greening base was 3.8 mg / L in N concentration and 0.3 mg / L in P concentration as annual average values.

[0032]

As described above, according to the present invention, a greening base suitable for installation on a roof or a roof is provided. This greening base can have a function of removing substances causing eutrophication of water bodies such as rivers, lakes and mars, and seas such as N and P. The greening base of the present invention can be configured so that the soil is not washed away by rainfall or wind by using the organic binder compounding soil. Applicable to By providing this greening base on the roof, a cooling effect by evaporation of water can be obtained in summer. It is also possible to obtain the heat insulating effect of the greening base.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a composite greening substrate according to an embodiment.

[Explanation of symbols]

 1 Greening base 2 Palm mat 3 Organic binder compound soil 4 Plant (Mexic stonecrop)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Naya Matsumoto 5-1-1 Koiehonmachi, Tokoname-shi, Aichi F-term in Inax Co., Ltd. (Reference) 2B022 AB04 BA02 BA03 BA04 BA05 BA12 BA23 BB01 BB02 BB03

Claims (6)

[Claims] 1. A greening base formed by shaping a granular inorganic porous body into a disk shape and solidifying it. 2. The greening substrate according to claim 1, wherein the granular inorganic porous body and glass powder are mixed and fired, and the granular inorganic porous body is bonded and solidified by glass. . 3. The greening substrate according to claim 1, wherein the inorganic porous body has an ion exchange ability. 4. The greening substrate according to claim 3, wherein the inorganic porous body contains a phosphorus removing component. 5. The greening base according to claim 1, wherein the soil containing an organic binder is plugged. 6. The greening base according to any one of claims 1 to 4, a soil holding material layer provided on an upper surface of the greening base, and a soil holding material layer packed in the soil holding material layer. And a soil containing an organic binder deposited thereon.