JP2002188104A - Dust free soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent children and horses from inhaling dust in a playground of a school, kindergarten, or a nursery school, a riding ground, or the like where the ground is covered with soil, dust easily arises in the winter when it is particularly dry, and prevent danger of falling and injury to the legs when water is sprinkled to prevent dust from rising. SOLUTION: When the dust free soil comprised by mixing petroleum hydrocarbon with low inflammability (for example, quenching oil) and water permeable particles is splashed over the ground, dust is prevented from rising. Anything lightweight and with favorable water permeability can be used as the water permeable particles. For example, in addition to normal sand, crushed roof tiles, burned products of papermaking sludge, crushed crockery, shells, and bone meal of animals, fish, cattle, pigs, or the like can be used and resources can be effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial soil where dust and dirt hardly stand.

[0002]

2. Description of the Related Art The ground is covered with soil in schools, kindergartens and nursery schools, such as athletic fields and riding grounds. However, especially in the dry winter season, dust and dirt tend to stand up, so that children and horses can get dust and dirt. There is a problem of smoking. On the other hand, if water is sprinkled to prevent dust and dust from standing, the ice freezes, and there is a risk of falling and damaging the feet.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a dust-free soil which solves the above-mentioned problems and in which dust and dust hardly stand.

[0004]

According to a first aspect of the present invention, there is provided a dust-free soil comprising a petroleum hydrocarbon having low flammability and a water-permeable particulate material. It is.

According to a second aspect of the present invention, there is provided the dust-free soil according to the first aspect, further comprising cement.

A third aspect of the present invention is the dustless soil according to the first or second aspect, further comprising a pigment.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dust-free soil according to the present invention will be described with reference to FIGS. The dust-free soil of the present invention is obtained by kneading a petroleum hydrocarbon having low flammability and a permeable particulate matter. As petroleum hydrocarbons having low flammability, steel materials, for example, quenching oils commonly used as quenching baths for quenching blades can be used. Preferably, the flash point is 2
It is 00 ° C or more (COC). For example, an oil manufactured by Mobile Oil Co., Ltd. (trade name: Mobile Therm D) can be used. This oil is 100% lubricating base oil and has the following physical and chemical properties.

[0008]

[Table 1]

The water-permeable granular material may be any material having good water permeability and light weight. For example, in addition to ordinary sand, pulverized material of tile, baked material of papermaking sludge, pulverized material of crockery, shell powder, bone powder of animal, fish cow, pig, etc. may be used. Damaged or chipped roof tiles are no longer useful, because they can easily enter water. In addition, paper sludge, unnecessary set goods, shells,
Bone meal of fish, cows, pigs, etc. is usually landfilled as waste. Therefore, if you use these,
Effective use of resources can be achieved. In addition, since tiles are usually colored, colored dustless soil can be manufactured when tiles are used.

[0010] These may be used alone, but preferably used in combination of many kinds. Preferred compounding ratio (weight ratio)
Is 5: 3: 2 such as sand: crushed tile: baked paper sludge, crushed Seto, shell powder, bone powder of shellfish, fish, cow, pig, etc.

Further, cement may be blended. Cement is a common inorganic bonding agent that shows curability when kneaded with water. When dustless soil is scattered beneath playground equipment installed on a horse ground or a park, it is preferable not to completely solidify the soil, but it is preferable to mix a small amount of cement in consideration of adhesiveness to the ground. A preferred blending ratio (weight ratio) is 10: 0.1 to 0.2: water-permeable granular material such as sand: cement. On the other hand, when used in a school playground or helicopter landing, it is preferable to mix cement to some extent. A preferred compounding ratio (weight ratio) is about 10: 1 water-permeable granular material such as sand: cement. In this case, an appropriate amount of water is added to harden the cement.

[0012] Petroleum hydrocarbons and permeable granules are 2 to 2
5% by weight: 98 to 95% by weight is preferred.
Further, a coloring pigment (color powder) may be appropriately blended.
As the pigment for coloring, a fluorescent pen or a paint pigment applied to an aircraft body can be used. Since pigments are well compatible with petroleum hydrocarbons, green and red, which could not be colored with conventional artificial soil, can be easily colored with the dust-free soil of the present invention.
In addition, since pigments are attached to petroleum hydrocarbons, they repel water and do not fade.

Next, the method of use will be described. Permeable granules such as sand, crushed tiles, and fired paper sludge;
A petroleum hydrocarbon having low flammability and, if necessary, cement, water and a pigment are blended and sufficiently kneaded using a mixer. Then, as shown in FIG. 1, the dust-free soil 1 is scattered as if the carpet was spread all over the ground 2. The thickness of the dust-free soil 1 is about 2 to 3 cm when not hardened, and about several mm when hardened.

When the dustless soil 1 is enlarged, as shown in FIG. 2 (A), the surface of the water-permeable granular material 3 is covered with a petroleum hydrocarbon 5. Further, the petroleum-based hydrocarbons 5 serve as an adhesive, and the water-permeable particulates 3 and the like 3 are bonded to each other. As a result, the dust-free soil 1 forms a protective film with no gap on the ground 3. As shown in FIG. 2 (B), when the pigment 7 is blended, the pigment 7 adheres to the petroleum hydrocarbon 5.

Although the embodiment of the present invention has been described in detail, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention. For example, the dustless soil 1 can be used not only on the ground but also mixed with the soil.

[0016]

The dust-free soil of the present invention is free of dust. In addition, the dust-free soil of the present invention is dry, and can be easily removed by touching the skin or clothes by hand. Therefore, if the dust-free soil of the present invention is scattered on an athletic field, a riding ground, a helicopter landing site, or the like, dust and dust can be efficiently prevented from being generated. Further, the dust-free soil of the present invention has water permeability, so that plants do not grow. Therefore, by scattered around the trees in the park, it is possible to prevent dust and dust from standing and to prevent the occurrence of weeds. Further, the dustless soil of the present invention can be used for many years if it is scattered once, so that the cost is low.

[Brief description of the drawings]

FIG. 1 shows a state where the ground is covered with dustless soil according to an embodiment of the present invention.

FIG. 2A is a partially enlarged view of the dust-free soil in FIG.
(B) is a figure which shows the state mixed with the pigment in the dust-free soil of (A).

[Explanation of symbols]

 Reference Signs List 1 dust-free soil 3 ground 5 permeable particulate matter 7 petroleum hydrocarbon 9 pigment

Claims (3)

[Claims] 1. A dust-free earth comprising a petroleum hydrocarbon having low flammability and a water-permeable particulate material. 2. The dust-free soil according to claim 1, further comprising a cement. 3. The dustless soil according to claim 1 or 2, further comprising a pigment.