JP2003102364A - Material for soil cover and method for laying soil cover by using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material for a soil cover, capable of preventing weeds from growing without affecting the growth of a planted material, and facilitating the construction even if the shape of the construction site is complex, and further to provide a method for laying the soil cover. SOLUTION: This material for the soil cover includes 5-35 pts.wt. hydraulic cement and 5-50 pts.wt. inorganic fine aggregate having <=1 mm particle diameter based on 100 pts.wt. granules comprising an inorganic fiber assembly. The soil cover is laid by mixing 100 pts.wt. material for the soil cover with 100-500 pts.wt. water, laying the resultant mixture so that the surface density is 0.5-10 kg/m<2> , and pressing the laid mixture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil cover for preventing the growth of weeds around the roots of plantings in, for example, road medians and road slopes.

[0002]

2. Description of the Related Art Conventionally, road median strips, road slopes,
Various types of planting are planted at airports, embankments, parks, etc. to prevent poor visibility and sediment outflow due to tall weeds. And around the roots of these plants,
Soil covers are provided to prevent the plantings from dying due to weeds.

Cardboard paper, plastic film, wood chips, etc. have been conventionally used as the material for the soil cover. However, there is a problem that cardboard paper or wood chips cause a fire due to throwing away cigarettes, etc. In recent years, soil covers using inorganic fibers have been widely used in recent years because they do not return to the soil without spoiling and return to the soil, which is a burden on the environment.

As for the shape of the soil cover, a sheet-shaped soil cover has been laid.
In this case, a large number of auxiliary materials such as retaining pins are required in order to fit the shape and unevenness of the ground to be laid and improve the grass-proof effect. Therefore, the work becomes complicated,
It is not economical because it takes a lot of time to lay a wide area. Further, there is a problem that a gap is easily formed between the ground and the soil covers or a portion where the soil covers are overlapped with each other, so that the grass-controlling effect is poor.

In order to solve the above problems, Japanese Patent Laid-Open No. Hei 13
No. 17002/1987 discloses a grass-repellent greening material consisting of a molded body in which an inorganic material mainly composed of an inorganic fiber and an inorganic hydraulic binder and water are sprayed on the entire surface of a laying place of a predetermined range or almost the entire surface to be integrated. Is disclosed.

[0006]

However, in the soil cover described in the above-mentioned Japanese Patent Laid-Open No. 13-17002, the problems such as fireproofness and layability of the soil cover material are improved, but the reasons are as follows. This caused new problems such as insufficient weed control and insufficient plant growth.

That is, in the above-mentioned Japanese Patent Laid-Open No. 13-17002, a preferable blending ratio of the inorganic fiber and the inorganic hydraulic binder is 30 to 80% by weight of the inorganic fiber.
The binder is 20 to 70%.

However, even within this range, when the amount of the inorganic hydraulic binder is small and the amount of the inorganic fibers is large, the inorganic hydraulic binder exists only at the contact points of the inorganic fibers, and when the soil cover is sprayed. Since the inorganic fibers are easily defibrated, the adhesion between the inorganic fibers is weakened, and there is a problem that the grass-proof property is poor. Further, depending on the defibration, there is a problem that the monofilament-shaped inorganic fibers float as fluff and may adversely affect the working environment.

On the other hand, when the amount of the inorganic hydraulic binder is increased, there is a problem that the strong alkaline component contained in the inorganic hydraulic binder has a bad influence on the growth of the plant. Further, when the inorganic hydraulic binder is dried and hardened, shrinkage causes cracks, and weeds grow from the cracks, so that there is also a problem that the weed-proof property is poor.

Therefore, an object of the present invention is to prevent weeds from growing without affecting the growth of plantings, and also to have excellent fireproofing properties, and even when the shape of the laying place is complicated, it causes unevenness or gaps. It is to provide a material for a soil cover and a method for laying a soil cover that can be easily laid without being in close contact with the ground surface.

[0011]

In order to achieve the above object, the material for a soil cover of the present invention is 5 to 35 parts by mass of hydraulic cement with respect to 100 parts by mass of a granular material composed of an inorganic fiber aggregate. , An inorganic fine aggregate with a particle size of 1 mm or less 5
It is characterized by containing 50 parts by mass.

According to the soil cover material of the present invention, since the inorganic fine aggregate having a particle diameter of 1 mm or less is contained in a predetermined ratio, the degree of sticking of the particulates becomes high, and the hydraulic cement. Sufficient weed control can be obtained even if the content of the species is low. Further, since the content of hydraulic cements is small, it is possible to avoid the adverse effect of strong alkaline components contained in hydraulic cements on plantings. Furthermore, since the inorganic fine aggregate is contained in a predetermined ratio, it is possible to prevent the hydraulic cement from shrinking during drying and causing cracks, and the grass-proof property is also improved.

In a preferred embodiment of the material for soil cover of the present invention, the particle size of the above-mentioned inorganic fiber aggregate is 2.0 to 10 mm. According to this aspect, the material for the soil cover can be laid without a gap, the workability is good, and the sufficient weed-preventing effect and the plantability are obtained.

In another preferred embodiment of the soil cover material of the present invention, the inorganic fine aggregate has a particle size of 2 to 200 μm.
It is m silica sand. According to this aspect, by using the fine aggregate having a particle diameter in the above range, the inorganic fibers, the hydraulic cements, and the inorganic fine aggregate constituting the material for the soil cover are more firmly fixed, and the soil cover Since the strength is increased, the grass-proof property is improved. Further, by using silica sand as the inorganic fine aggregate, a soil cover having high water permeability and low water retention can be obtained.

The method for laying the soil cover of the present invention is also characterized in that, with respect to 100 parts by mass of the granular material composed of the inorganic fiber aggregate, 5 to 35 parts by mass of hydraulic cement and an inorganic fine aggregate having a particle size of 1 mm or less. 100 to 500 parts by mass of water was added to 100 parts by mass of the material for a soil cover containing 5 to 50 parts by mass, and it was laid at a laying place so that the surface density was 0.5 to 10 kg / m ² . It is characterized by pressing afterwards.

According to this method, as the material for the soil cover, the granular material composed of the inorganic fiber aggregate, the hydraulic cement, and the inorganic fine aggregate having a particle diameter of 1 mm or less are contained in a predetermined ratio. The soil cover material can be easily laid, and even if the laid portion has a complicated shape, it can be closely attached to the ground surface without causing unevenness or gaps.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. First, the material for the soil cover of the present invention will be described.

Examples of the inorganic fiber aggregate used as the material for the soil cover of the present invention include rock wool and glass wool. The strong alkali component contained in the cement does not lower the fiber strength and prevent weeds. From the viewpoint of improving the property, it is more preferable to use rock wool having excellent alkali resistance.

The above-mentioned inorganic fiber aggregate is used after being formed into a granular material. The particle size of this granular material is preferably in the range of 2.0 to 10 mm. In addition, the particle size distribution of the above-mentioned granular material has a particle size of 2. in the opening of the sieve of JIS-Z8801.
It is more preferable that the length of 36 mm or more and less than 5.60 mm is 80% or more, and the thickness of 5.60 mm or more is 10 mm or less.

If the particle size of the above-mentioned granular material is less than 2.0 mm, the volume of the material for the soil cover becomes large, and the work time until it fits on the ground surface without any unevenness becomes long and the workability deteriorates. Not preferable. Further, if the particle size of the above-mentioned granules exceeds 10 mm, the gaps between the granules may become large after being fixed, and the grass-proofing effect aimed at by the present invention may not be obtained, which is not preferable.

The hydraulic cements used as the material for the soil cover of the present invention are not particularly limited, but early-strength portland cement, low heat-generating portland cement, iron ore cement, ferrari cement, curle cement, white portland cement, titanium. Cement, Portland cement such as manganese cement, chrome cement, alumina cement, lime alumina cement, hydraulic lime, roman cement, alum-lime, lime slag cement, lime volcanic ash cement, blast furnace slag mixed cement, iron Portland cement, silica Cement, pozzolan cement, fly ash cement, masonry cement, high-sulfate slag cement, etc. may be mentioned, and one kind of the hydraulic cement may be used alone, or a plurality thereof may be used in combination. No. Among these, Portland cements are preferably used from the viewpoints of strength after curing and economical efficiency.

The content of hydraulic cements is essentially required to be 5 to 35 parts by weight, and more preferably 10 to 25 parts by weight, based on 100 parts by weight of the above-mentioned granular material.

If the amount of hydraulic cement used is less than 5 parts by mass, the binder component becomes insufficient, the strength of the soil cover becomes insufficient, and the weed-preventing effect decreases, which is not preferable. On the other hand, when the amount of hydraulic cement used exceeds 35 parts by mass, it has a sufficient weed-preventing effect, but the amount of strong alkaline component contained in the binder after solidification increases, and when this component flows out in rainwater etc. In addition, it may have an unfavorable effect on the planted matter, which is not preferable.

Next, the inorganic aggregate used as the material for the soil cover of the present invention will be described.

As the inorganic aggregate, it is necessary to use an inorganic fine aggregate having a particle size of 1 mm or less. This allows
The degree of sticking of the particulates to each other increases, and the strength of the soil cover increases. This is because it exerts the same function as the inorganic aggregate contained in concrete and mortar used in the field of construction and civil engineering, and the aggregate functions as an extender, and hydraulic cements are used. Even if the amount used is small, it will increase substantially as a binder component,
It is considered that it becomes possible to increase the number of contact points between the inorganic fibers and the binder, and thereby the adhesive force between the inorganic fibers by the binder can be increased.

Further, by containing the inorganic fine aggregate having a particle diameter of 1 mm or less, it is possible to prevent the hydraulic cement from shrinking during drying and cracking. This prevents the growth of weeds from cracks,
It is possible to improve the weed-proof property of the soil cover.

The particle size of the inorganic aggregate is 2 to 2
It is preferable to use an inorganic aggregate of 00 μm. Here, the inorganic aggregate with a particle size of 2 to 200 μm may include those outside the range of the above particle size, but the particle size of 2 to 200 μm
It means that 70% or more of the inorganic aggregate of m is contained. Further, it is preferable that the particle size distribution is narrow, the particle size is uniform, and the particle shape is close to a sphere. If the particle size is less than 2 μm, the apparent bulk becomes large, it takes time to mix with rock wool, and productivity is impaired.
When it exceeds 00 μm, it is easy to classify with time after mixing with rock wool, which is not preferable.

The type of inorganic aggregate is not particularly limited, but it is preferable that it has high hardness, does not contain mud or organic substances, has a large specific gravity, is excellent in abrasion resistance and has a low salt content.

Further, from the viewpoint of suppressing germination of the flying seeds, it is preferable that the water absorption is small. For example, montmorillonite, which is a mineral having a layered structure called clay,
Hectorite, smectites such as saponite, kaolinite, dickite, nacrite, kaolins of halosite, vermiculite are easy to absorb water, resulting in increased water absorption and water retention of the soil cover, It is not preferable because it tends to promote germination of flying seeds.

Silica sand is mentioned as a preferable type of inorganic aggregate which satisfies the above requirements. Silica sand is preferably used because it improves the strength of the soil cover without inhibiting the hardening of hydraulic cements. In the present invention, it is preferable to use fine silica sand having a particle size of 170 μm or less,
It is more preferable from the viewpoint of compatibility with the particulate matter.

The content of the inorganic aggregate is 100
It is essential to contain 5 to 50 parts by mass with respect to parts by mass, and further preferably 5 to 20 parts by mass.

When the amount of the inorganic aggregate used is less than 5 parts by mass, the effect as an extender becomes insufficient, the effect of suppressing the volume change generated when the hydraulic cements harden is reduced, and the soil cover is reduced. It is not preferable because cracks may occur. On the other hand, if it exceeds 50 parts by mass, the inorganic aggregate tends to be unevenly distributed in the mixing with the particulate matter and the hydraulic cement, and the uniformity as an intermediate for a soil cover may be insufficient, which is not preferable.

Each of the components of the above material for the soil cover, the granular material composed of the inorganic fiber aggregate, the hydraulic cements, and the inorganic fine aggregate are premixed by a conventionally known ribbon mixer or the like, and the soil cover described later is obtained. To be laid.

Next, a method of laying a soil cover according to the present invention will be described. First, 100 parts by weight of the material for the soil cover premixed as described above is added to 100 parts of water.
˜500 parts by mass are mixed and solidified. Here, the amount of water used is 10 with respect to 100 parts by mass of the material for the soil cover.
If the amount is less than 0 parts by mass, the hardening of the hydraulic cement will be insufficient, and the grass cover of the obtained soil cover will be deteriorated, which is not preferable. On the other hand, when the amount of water used exceeds 500 parts by mass, the solidified cement becomes brittle, the strength as a soil cover is insufficient, and the grass-proof property is also deteriorated, which is not preferable.

The method of laying is not particularly limited, but when spraying, the fibers may be disentangled and scattered.
In addition, the strength of the obtained soil cover is lowered and the soil cover becomes uneven, which is not preferable, and it is preferable to use a method of dropping and depositing the mixture.

The order of laying is not particularly limited. For example, the material for the soil cover and a predetermined amount of water are mixed in advance and sprayed by a pressure blower or the like, preferably by manpower or the like, and desired in all areas to be laid. An example is a method in which the mixture is dropped and accumulated or sprinkled to have an areal density, and then pressed by a roller or the like so as to fit the shape of the ground surface and leveled.

However, mixing the soil cover material with a predetermined amount of water in advance requires a large amount of spraying equipment. Therefore, the soil cover material should be weighed, dropped and deposited or sprayed so that it has a desired areal density over the entire area where it is to be laid, and then a predetermined amount of water should be sprinkled on it to fit the shape of the ground surface with a roller or the like. A method of pressing and leveling can be preferably adopted. In this method, since the soil cover material is sprinkled and then water is sprinkled, the soil cover material spraying device is more compact, which is more preferable.

In the method of laying the soil cover of the present invention, the area density of the soil cover is 0.5 to 10 kg / m ² , preferably 1
Lay it so that it will be ~ 5kg / m ² . The areal density is 0.5
If it is less than kg / m ^2, it is not preferable because sunlight easily penetrates to the ground surface, and it becomes impossible to obtain sufficient weed control effects such as emergence of weed buds through the soil cover due to the tropism of the plant. When it exceeds 10 kg / m ² , the material for the soil cover to be laid becomes bulky, the work takes a long time, and further effect of improving the weed control property is not recognized, which is uneconomical, which is not preferable.

In the method for laying the soil cover of the present invention, it is necessary to press the material for the soil cover after laying it at the laying place. By this pressing, the soil cover is fitted to the ground surface, and the effect of not causing the unevenness is obtained. The pressing method is not particularly limited, but it is preferable to use a roller after laying the soil cover material. Although there is no limitation on the shape, material, size, etc. of the roller, it is preferable to use a roller made of plastics or aluminum having a smooth surface in consideration of the burden on the operator and the convenience and efficiency of the operation. Further, in order to improve workability, it is preferable that the roller is provided with a handle of about 1 to 1.5 m.

Since the soil cover laid in this way has a sufficient ability to block sunlight and has water permeability, it can suppress the growth of weeds. Since the content can be reduced, the growth of plantings is not impaired by the alkaline components of hydraulic cements. Also, since the soil cover has thermal insulation properties, covering the root of the planting plant can protect the roots of the planting plant from large fluctuations in temperature and reduce the factors that hinder the growth of the planting plant. You can

Therefore, it is not necessary to carry out regular weeding work after planting the planting plant. Especially, when the planting plant or shrub planted on the road slope or the median strip is applied, the weeding work can be omitted. Therefore, it is possible to solve problems such as a danger associated with an increase in traffic volume and an adverse effect on the health of workers due to exhaust gas.

Further, since it can be fitted and covered on the ground surface around the root of the planted plant, it is unlikely to cause unevenness or gaps, and there is no cracking or chipping. Can be prevented from flowing out. Also, even when small shrubs or twigs are growing, there is no complicated work such as making cuts, and it is not necessary to fix it with a net or a retaining pin so that it is blown away by the wind. Workability is improved.

Furthermore, since the soil cover does not contain an organic material, it has excellent fire resistance. In addition, since inorganic fibers are used as the main component, when it decays, it returns to the soil and has less impact on the environment.

[0044]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 30 parts by mass of Portland cement and 40 parts by mass of fine silica sand having a particle size of 170 μm or less were added to 100 parts by mass of rock wool granular cotton having an average fiber diameter of 5 μm and an average particle size of 6 mm.
The materials were mixed in a ribbon mixer to obtain a material for a soil cover.

Example 2 15 parts by mass of alumina cement and 10 parts by mass of fine silica sand having a particle size of 170 μm or less were placed in a ribbon mixer with respect to 100 parts by mass of rock wool granular cotton having an average fiber size of 5 μm and an average particle size of 5 mm. And mixed to obtain a material for a soil cover.

Example 3 100 parts by mass of rock wool granular cotton having an average fiber size of 5 μm and an average particle size of 5 mm was used and 2 parts of white Portland cement were used.
0 parts by mass and 25 parts by mass of fine silica sand having a particle size of 170 μm or less were mixed with a ribbon mixer to obtain a material for a soil cover.

Example 4 To 100 parts by mass of rock wool granular cotton having an average fiber size of 5 μm and an average particle size of 5 mm, 2 parts of white portland cement were used.
0 parts by mass and 25 parts by mass of silica sand having a particle size of 500 μm or less were mixed with a ribbon mixer to obtain a material for a soil cover. .

Comparative Example 1 3 parts by mass of Portland cement and 10 parts by mass of fine silica sand having a particle size of 170 μm or less were mixed with 100 parts by mass of rock wool granular cotton having an average fiber diameter of 5 μm and an average particle size of 5 mm with a ribbon mixer. Then, a material for a soil cover was obtained.

Comparative Example 2 30 parts by mass of Portland cement was mixed with 100 parts by mass of rock wool granular cotton having an average fiber diameter of 5 μm and an average particle size of 5 mm by a ribbon mixer to obtain a material for a soil cover.

Comparative Example 3 50 parts by mass of alumina cement and 30 parts by mass of fine silica sand having a particle size of 170 μm or less were mixed with 100 parts by mass of rock wool granular cotton having an average fiber diameter of 5 μm and an average particle size of 5 mm with a ribbon mixer. Then, a material for a soil cover was obtained.

Comparative Example 4 White Portland cement 2 was added to 100 parts by mass of rock wool granular cotton having an average fiber size of 5 μm and an average particle size of 5 mm.
0 parts by mass and 3 parts by mass of silica sand having a particle size of 170 μm or less were mixed with a ribbon mixer to obtain a material for a soil cover.

Comparative Example 5 30 parts by mass of Portland cement and 60 parts by mass of fine silica sand having a particle size of 170 μm or less were mixed with 100 parts by mass of rock wool granular cotton having an average fiber diameter of 5 μm and an average particle size of 5 mm with a ribbon mixer. Then, a material for a soil cover was obtained.

Comparative Example 6 20 parts by mass of Portland cement and 25 parts by mass of silica sand having a particle size of 2 mm or less were mixed with 100 parts by mass of rock wool granular cotton having an average fiber diameter of 5 μm and an average particle size of 5 mm with a ribbon mixer. A material for a soil cover was obtained.

Table 1 shows the compositions of the materials for soil covers of Examples 1 to 4 and Comparative Examples 1 to 6 together.

[0056]

[Table 1]

Test Example 1 The soil cover materials of Examples 1 and 2 and Comparative Example 5 were sprayed with the soil cover material on the ground surface rooted in weeding in Samukawa Town, Takaza District, Kanagawa Prefecture in September 1998. , 150 parts by weight of water for 100 parts by weight of the material for the soil cover
Sprinkle water so that it becomes the mass part, diameter 60 mm, length 200
Laying area 4.0m by laying and solidifying so as to fit the ground surface with a polyvinyl chloride roller of mm
² , a soil cover having a thickness of 40 mm and an average surface density of 5.0 kg / m ² was formed.

In this state, when left for 2 years until September 2000, the soil covers using Examples 1 and 2 each had a weed growth of 0.75 / m. ² , 0.75 / m ² , the effect of suppressing weeds was remarkable.

On the other hand, in the soil cover using Comparative Example 5 in which the content of the inorganic fine aggregate was more than the range specified in the present invention, the adhesive force between the rock wool granular surfaces forming the soil cover was high. Insufficient, a part where rock wool granular cotton was missing from the soil cover and a crack were observed, and the number of weeds that grew through the crack and the soil cover was 10.8 / m ² .

Further, regarding the soil cover using Example 1, the temperature of the place where the soil cover was applied and the temperature where it was not applied were measured at a depth of 5 cm, and it was found that the place where the soil cover was applied was not applied. Compared to 3.2 ℃
A low result was obtained and the heat insulation effect could be confirmed.

Test Example 2 Regarding the materials for soil covers of Examples 1 and 2 and Comparative Example 3,
Laying area 4.0m ²In addition, the ground cover hedera heli
5 x / m²After planting at the same ratio as in Test Example 1,
When laying such a soil cover under the same conditions, the entire laying surface
The period until the product is completely covered by Hedera Helix
The soil cover using Example 1 was used for one year and Example 2 was used.
It was 8 months on the soil cover.

On the other hand, in the soil cover using Comparative Example 3 in which the content of hydraulic cements was higher than the range specified in the present invention, the growth of the planted hedera helix was slow, In comparison with Examples 1 and 2, a large difference was observed in the degree of growth.

Test Example 3 With respect to the materials for soil covers of Example 3 and Comparative Example 1,
In June 1999, in Samukawa Town, Takaza-gun, Kanagawa Prefecture, after weeding and rooting, 20 seeds of Crabgrass, which is a weed, were found.
Soil at a ratio of m ² , sprinkle the material for the soil cover on it, and 120 parts of water for 100 parts by mass of the material for the soil cover.
Sprinkle water so that it becomes the mass part, diameter 40 mm, length 250 m
By laying and solidifying so as to fit the ground surface with an aluminum roller of m, the laying area is 4.0 m ² ,
A soil cover having an average thickness of 40 mm and an average surface density of 4.5 kg / m ² was formed.

In this state, when left for 3 months until September 1999, in the soil cover using Example 3, no crabgrass or weeds growing through the soil cover were observed. On the other hand, in the soil cover using Comparative Example 1 in which the content of hydraulic cements is less than the range specified in the present invention, the crabgrass is 4.0.
The soil cover was penetrated at a rate of book / m ² .

Test Example 4 150 parts by mass of water was added to 100 parts by mass of the materials for soil covers of Examples 3 and 4 and Comparative Examples 2, 4 and 6 and mixed using a kneader.

For the mixtures of Examples 3 and 4 and Comparative Example 4 above, the average slope of 1 in Hiratsuka City, Kanagawa Prefecture, in June 1999.
After spraying the mixture on an 8.4 degree slope,
Using a polyvinyl chloride roller having a diameter of 60 mm and a length of 200 mm, by laying and solidifying so as to fit the ground surface, a laying area of 10 m ² and an average thickness of 50 m
A soil cover having an average surface density of 4.5 kg / m ² was formed.

For the mixture of Comparative Example 2, a soil cover was formed under the same conditions as above except that the mixture was sprayed using a pressure blower without using a polyvinyl chloride roller and solidified as it was. .

With respect to the mixture of Comparative Example 6, a soil cover was formed under the same conditions as above except that the average surface density was set to 3.9 kg / m ² .

Under this condition, two years until June 2001
When left alone, a soil cover using Examples 3 and 4 was used.
Is the soil cover that is cracked or missing.
No spill was observed, and any miscellaneous material that had grown through the soil cover.
0.8 grass / m ², 2.0 / m²And
It was

On the other hand, in the soil cover using Comparative Example 2 which did not contain the inorganic fine aggregate, cracks and chipping occurred in the soil cover at several places, and the earth and sand flowing out from the soil cover accumulated on the soil cover. However, weed reproduction was observed.

Also, in the soil cover using Comparative Example 4 in which the content of the inorganic fine aggregate was less than the range specified in the present invention, partial cracking of the soil cover was observed, and the soil cover penetrated, and The number of weeds grown from the cracks was 10.0 / m ² , which was clearly inferior to the weed control in comparison with the soil cover prepared in Example 3.

Further, in the soil cover using Comparative Example 6 in which the particle size of the inorganic fine aggregate is larger than the range specified in the present invention, the weeds grown through the soil cover are
It was observed that the number was as high as 7.5 fibers / m ² and that the adhesion between the rock wool granular cottons was rough compared to the soil cover using Example 3.

[0073]

As described above, according to the present invention,
Weeds can be prevented from growing without affecting the growth of plantings, and they have excellent fire resistance.Even if the laying location is complicated, they can adhere to the ground surface without causing inconvenience or gaps, and can be easily laid. It is possible to provide a soil cover material that can be used and a method for laying a soil cover. Such a soil cover can be suitably used in road medians, road slopes, airports, embankments, parks and the like.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masahiko Ikeda             3-6-3 Kanda Blacksmith Town, Chiyoda-ku, Tokyo               Asahi Fiber Glass Co., Ltd. (72) Inventor Takashi Bando             3-6-3 Kanda Blacksmith Town, Chiyoda-ku, Tokyo               Asahi Fiber Glass Co., Ltd. (72) Inventor Yuka Masaki             3-6-3 Kanda Blacksmith Town, Chiyoda-ku, Tokyo               Asahi Fiber Glass Co., Ltd. (72) Inventor Matsusaburo Morita             13-12 Iwamotocho, Chiyoda-ku, Tokyo             Hongo Fertilizer Co., Ltd. (72) Inventor Toshiro Tezuka             13-12 Iwamotocho, Chiyoda-ku, Tokyo             Hongo Fertilizer Co., Ltd. (72) Inventor Shogo Maeda             13-12 Iwamotocho, Chiyoda-ku, Tokyo             Hongo Fertilizer Co., Ltd. F-term (reference) 2B024 AA10 BA02 DB10                 2B121 AA19 BB30 EA24 FA01 FA07                       FA12 FA15 FA16                 2D044 DC04

Claims (4)

[Claims] 1. A content of 5 to 35 parts by mass of hydraulic cement and 5 to 50 parts by mass of an inorganic fine aggregate having a particle diameter of 1 mm or less with respect to 100 parts by mass of a granular material composed of an inorganic fiber aggregate. Characteristic soil cover material. 2. The soil cover material according to claim 1, wherein the particle size of the inorganic fiber aggregate is 2.0 to 10 mm. 3. The inorganic fine aggregate has a particle size of 2 to 200 μm.
The material for soil covers according to claim 1 or 2, which is silica sand. 4. A soil cover containing 5 to 35 parts by mass of hydraulic cement and 5 to 50 parts by mass of an inorganic fine aggregate having a particle diameter of 1 mm or less based on 100 parts by mass of a granular material composed of an inorganic fiber aggregate. 100 to 100 parts by weight of the material, water 100 ~
A surface density of 0.5 to 10 kg / containing 500 parts by mass
A method for laying a soil cover, which comprises laying so as to be m ² and then pressing.