KR20160008420A

KR20160008420A - Light Weight Artifical Soil Composition for Afforestation Using Mineral Wool Powder and Method for Preparation the Same

Info

Publication number: KR20160008420A
Application number: KR1020140088602A
Authority: KR
Inventors: 예덕현; 김지영; 김성호
Original assignee: 주식회사 벽산
Priority date: 2014-07-14
Filing date: 2014-07-14
Publication date: 2016-01-22

Abstract

The present invention relates to a light weight artificial soil composition for greening using mineral wool powder, and a producing method thereof. The light weight artificial soil composition for greening according to the present invention comprises: 30 to 60 wt% of mineral wool powder; 15 to 40 wt% of cocopeat; 20 to 40 wt% of bottomash; a first mixture mixed by 5 to 10 wt% of vermiculite; and 10 to 20 parts by weight of water with respect to 100 parts by weight of the first mixture. The artificial soil composition is suitable for artificial soil due to excellent moisture retention, drainage properties, heat insulating properties, durability and air permeability, and is eco-friendly because of using a waste product.

Description

TECHNICAL FIELD [0001] The present invention relates to a lightweight artificial soil composition for greening using a mineral wool powder and a method for preparing the same.

More particularly, the present invention relates to a lightweight artificial soil composition for mineralization using mineral wool powder, and more particularly, to a method of manufacturing a lightweight artificial soil composition for mineralization using a mineral wool powder, The present invention relates to a lightweight artificial soil composition for recording, which is excellent in water holding capacity, drainage property, heat insulation property, durability and air permeability, and a method for producing the same.

Population concentration in the city has been called as land shortage and land price increase, and as the maximization of the land use through the densification is promoted, the residual notice is reduced, and it becomes increasingly difficult to secure the green space. As a solution to this problem, It is inevitable to record the artificial soil that has been generated.

Artificial ground refers to a space that seeks to actively utilize human beings by creating material and morphological conditions similar to natural ground conditions artificially separated from natural grounds.

These types of artificial grounds are formed by artificial construction of civil engineering, upper part of building structure or special large-scale land development. The artificial ground that is generated from civil engineering is typical of bridge pier, various underground facilities, upper part of river cover space, etc. In case of buildings, it is most common to make artificial ground on the roof of building according to the nature and conditions of building. Veranda, terraces, etc. are also covered by it. In addition, artificial grounds are created to enhance the efficiency of land use in special land development areas such as reclaimed land and refuse landfills.

Soil is one of the most problematic loads in the artificial soil formation. Of course, the weight of trees and facilities is taken into account, but soil weight is the biggest variable. Therefore, in order to reduce the load burden on the soil, generally lightweight artificial soil is used in Korea, but the conventional lightweight artificial soil causes the following problems.

1) In case of using general soil such as Masato, it may have an adverse effect on the safety of the building due to the large load per unit.

2) Perlite, which is used as lightweight artificial soil, and general lightweight compost organic material. In the case of perlite, it is compaction with time, which affects plant roots and it is not easy to grow. Which is significantly lower than the existing soil. In addition, due to the nature of artificial ground, it is likely to cause disputes in the surrounding area if it is used in a dense area of a building. In the case of general lightweight composting, the organic matter decomposes with time, leading to a decrease in soil mass and periodic replenishment. Perlite has not met the standard of chemical properties of soil, but the company only discloses the properties as shown in Table 1 below, but does not disclose chemical properties.

Item Properties Related Standards Permeability coefficient 200 (mm / hour) or more KS F 2322 Unit volume weight 0.080 to 0.120 (kg / l) KS F 3701 Saturated function weight 600 (kg /) or less Soil chemical analysis method of Rural Development Administration Thermal conductivity 0.064 (W / mK) or less KS L 9016

[Source: Kyungdong Ceratek Paraso Cultivation (http://www.kdnetwork.com)]

Accordingly, the present inventors have found that the mineral wool powder generated as a by-product in the production process of industrial / agricultural mineral wool can prevent scattering due to aggregation phenomenon, and has a water holding function for supplying water necessary for growing the plant, And it is excellent in the heat insulation function for the building even though it is light in weight and can be used as one raw material of the artificial soil. Thus, the present invention has been completed.

Korean Patent Laid-Open Publication No. 10-1997-0021039 (Title of the Invention: Method for producing fertilizer using discarded rock surface, public date: May 28, 1997)

Therefore, a problem to be solved by the present invention is to prevent scattering due to aggregation phenomenon, which is a characteristic of mineral wool powder, to provide a water-holding function for water supply necessary for plant growth, a function of containing oxygen necessary for plant growth, The present invention provides a lightweight artificial soil composition for recording using a mineral wool powder excellent in heat insulation function for the soil.

Another object of the present invention is to provide a method for producing a lightweight artificial soil composition for greening using mineral wool powder.

In order to solve the above problems,

30 to 60% by weight of mineral wool powder;

15 to 40% by weight of Cocopeat;

20 to 40% by weight of Bottom Ash; And

A first mixture mixed with 5 to 10% by weight of vermiculite and

And 10 to 20 parts by weight of water relative to 100 parts by weight of the first mixture is a lightweight artificial soil composition for greening.

According to another aspect of the present invention,

30 to 60% by weight of mineral wool powder; 15 to 40% by weight of Cocopeat; 20 to 40% by weight of Bottom Ash; And 5 to 10% by weight of vermiculite to prepare a first mixture; And

And mixing 10 to 20 parts by weight of water with respect to 10 parts by weight of the first mixture.

The lightweight artificial soil composition for greening according to the present invention has the following effects.

First, it contains a certain amount of water and drains it, so that the water content and drainage are smooth, and due to the characteristic of mineral wool, there is a certain volume of pore like cotton.

Second, it maintains a constant volume of pores while retaining its original state without decaying or rotting, and provides nutrients to the soil with mixed organic components.

Third, byproducts that are treated as general wastes are recycled, thereby maximizing efficiency and preventing environmental pollution.

Fourth, it is made of uniform and fine 5 (micron) fiber to exhibit thermal insulation effect, has energy saving effect, and has high heat resistance with artificial mineral fiber to provide safety against building fire.

Fifth, the density of the mineral wool powder itself is high, and the sound absorption performance is excellent because air is tightly contained between fine fibers.

Sixth, the mineral wool powder obtained by crushing mineral wool in the form of agriculture and flower media is recycled, and it is economical by preventing environmental pollution and recycling.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a composition comprising 30 to 60% by weight of a mineral wool powder; 15 to 40% by weight of Cocopeat; 20 to 40% by weight of Bottom Ash; And 5 to 10% by weight of vermiculite, and 10 to 20 parts by weight of water based on 100 parts by weight of the first mixture.

The mineral wool powder, which is a main ingredient in the composition according to the present invention, is a slug from a steel mill, which is melted at a temperature of 1,500 ° C or higher to inject a slug in a liquid state into a drum at a high rotation speed to form a fiber state, As a by-product, it has a granular surface shape, which is ground to 5 to 10 mm and used as a main material of artificial soil.

Mineral wool powder is chemically inert, sterile and has a completely uniform performance. In addition, the roots of the plant can absorb water very easily, so that up to 90% of the water can be absorbed without resistance. Therefore, plants are not likely to experience moisture stresses because more than 15% of the pH value is always maintained. Conversely, the mineral wool powder is freely drained and the roots of the plant are not over-humidified. Even if an extremely large amount of water is given, the air content of the pores of the mineral wool powder is returned to 30 to 40% after 1 to 2 minutes.

It is preferable that the mineral wool powder is used within a range of 30 to 60 wt% based on the total weight of the composition. If the amount of the mineral wool powder is out of the range, the content of the other mixture is increased, It can become an over-humid condition and cause the damage. In case of a hot period, there is a water shortage phenomenon, which may cause a problem that can cause a death due to a lack of water supply to the plant. In addition, as the pH value of the plant is reduced to 4 to 4.5, acidification occurs and the plant growth is deteriorated.

The method of producing mineral wool powder is as follows.

1. The waste mineral wool for construction is collected and stored in a gathering place, and the mineral wool in the form of 5 to 50 cm pieces is crushed to 1 to 5 mm by a crusher to produce.

2. Agricultural Waste Mineral wool is collected from the flower / agricultural medium and is pulverized by a pulverizer in the same manner as No. 1 to produce powder.

Finally, the mineral wool powder showed much lower than the standard value in the heavy metal contents required when applying the fertilizer standard method which is not in the soil standard, and the electric conductivity (EC) is 0.07 (Lower than 0.05), which is a much lower level than the standard of soil evaluation. The physical properties of the mineral wool powder, which is the main raw material for artificial soil, were commissioned by the Agricultural Technology Application Foundation (14.3.26 Analysis Result) and Seoul National University Agricultural Biology Science Institute (14/3/28 Analysis Result) Table 2 shows the results.

Evaluation items unit Heavy metal tolerance Mineral Wool Powder Properties How to measure As (arsenic) mg / kg 50 Non-detection Fertilizer management law Cd (Cadmium) mg / kg 5 Non-detection Hg (mercury) mg / kg 2 0.0026 Pb (lead) mg / kg 150 Non-detection Cr (chromium) mg / kg 300 15.96 Cu (copper) mg / kg 300 4.99 Ni (nickel) mg / kg 50 1.69 Zn (zinc) mg / kg 900 2.66 Evaluation items unit Soil standard
(Intermediate level) Mineral Wool Powder Properties How to measure Soil acidity (pH) - 6.5 to 7.0 8.9 Soil chemical analysis method Electrical Conductivity (E.C) ds / m Less than 0.2 0.07 Base replacement capacity (C.E.C) cmol / kg 20 ~ 6 0.96 Total nitrogen (T-N) % 0.12 or more 0.25 Effective tannin acid content
(Avail, P2O5) mg / kg 200-100 41 Substitutional potassium (K +) cmol / kg 3.0 to 0.6 0.14 Substitutional calcium (Ca ++) cmol / kg 5.0 to 2.5 0.5 Substitutional magnesium (Mg ++) cmol / kg 3.0 to 0.6 - Salinity % Less than 0.05 0.01 Organic matter content (O.M) % 5.0 to 3.0 0.18

[Source: Agricultural Technology Practicalization Foundation (14.3.26). Seoul National University Agricultural Biotechnology Joint Instrument Center (14/3/28 Analysis Result)]

For other deficient parts such as soil acidity (pH) and organic matter content of the mineral wool powder, the following common materials are mixed to compensate for the deficiency.

Cocofit is a physicochemical process for producing coconut dust after coconut fiber is extracted from the outer surface of coconut. It has high water holding capacity, good strength, good ventilation, low density It has a high cation exchange capacity and a constant resistance to degradation. It continuously supplies plant effects and promotes the activity of soil microorganisms, including carbon-containing materials, to provide organic nutrients and maintain soil pH (acidity) So as to exhibit the effect of neutralizing the soil.

Such coco peots are mixed in a preferred embodiment of the present invention by 15 to 40% by weight based on the total weight of the composition. When the coco peat exceeds 40% by weight, degradation due to increase of effective microorganisms occurs and loss of the soil occurs to compensate. If the content is less than 15% by weight, the role of the organic nutrients is deteriorated.

BottomAsh is coal ash generated from thermal power plant and it reduces environmental pollution with 100% recycled material. It has excellent water retention, bracing ability and ventilation and is very good for plant growth. It is a semi-permanent life span, Contains a large amount of minerals to help.

Such bottom ash is mixed in an amount of 20 to 40% by weight based on the total weight of the composition in a preferred embodiment of the present invention. Bottom ash is used as a main material having a particle size of 0.6 to 10 mm, thereby rapidly providing a large amount of minerals that are useful for plant growth together with drainability to plants.

Vermiculite is typically produced by the alteration of biotite and is produced as a large virtual image alternating with biotite, or as small particles in soil and old sediments. Because the expanded vermiculite is very light (specific gravity less than 0.09), it is widely used as a lightweight material.

Such vermiculite is mixed in a preferred embodiment of the present invention by 5 to 10% by weight based on the total weight of the composition. Since vermiculite has a high water retention property, if it exceeds 5% by weight, it may cause roots rotting due to the excessive humidification of plants, and when it is less than 5% by weight, it can not effectively use other material properties. Therefore, the proper weight% should be maintained.

The water to be mixed with the above-mentioned components is used to supply water to the mixture, and the water content of the artificial soil composition can be maintained at about 10 to 30% by mixing 10 to 20 weight ratio with respect to 100 weight ratio of the mixture, So that water can be added.

In particular, in a preferred embodiment of the present invention, natural plant physiologically active substances are further added to water to promote plant growth. The natural plant physiologically active substance used herein may be humic acid or fulvic acid. They may be diluted with water at a ratio of 800 to 1,000 times and added at a concentration that can help grow plants such as flowers and crops.

The lightweight artificial soil composition for greening according to the present invention comprises 30 to 60% by weight of a mineral wool powder; 15 to 40% by weight of Cocopeat; 20 to 40% by weight of Bottom Ash; And 5 to 10% by weight of vermiculite to prepare a first mixture; And mixing 10 to 20 parts by weight of water with respect to 100 parts by weight of the first mixture.

Here, the description of the raw materials used in the step of preparing the first mixture is as described above, and the mixing conditions and the like are the same as those generally used in this field.

In addition, mixing the water with the first mixture may also be carried out in a manner commonly used in this field.

Hereinafter, the present invention will be described in more detail with reference to Examples, but it should not be understood that the present invention is limited to the following Examples.

Example One

45% by weight of ground mineral wool powder, 25% by weight of Cocopeat, 25% by weight of Bottom Ash and 5% by weight of vermiculite were mixed in an average size of 5 to 10 mm. Then, 3,000 ml of water added with a natural plant physiologically active substance (mixed with humic acid and fulvic acid in a weight ratio of 1: 1) at a concentration of 3 ml was added and mixed to prepare an artificial soil.

Then, the thus prepared artificial soil composition was analyzed by the First Analysis Center (14.5.20), the Environmental Health Technology Research Institute (14.6.2), and the Korea Chemical Fusion Test Research Institute (14.6.19) The following properties were obtained. Evaluation items and evaluation criteria of the physical and chemical properties of the soil are shown in Tables 4 to 5 for comparison.

Evaluation items unit The physical properties of the examples How to measure Effective water content % 30-35 Soil chemical analysis Porosity % 77.2 Permeability cm / s 2.2 x 10 ^-1 KS F 2322: 2200 Soil weight - 0.5 Soil physics analysis method Soil acidity (pH) - 6.7 Soil chemical analysis method Electrical Conductivity (E.C) ds / m 2.32 Base replacement capacity (C.E.C) cmol / kg 16.49 Total nitrogen (T-N) % 0.229 Available tannin acid content (Avail, P2O5) mg / kg 105.9 Substitutional potassium (K +) cmol / kg 4.27 Substitutional calcium (Ca ++) cmol / kg 3.83 Substitutional magnesium (Mg ++) cmol / kg 2.22 Salinity % 0.4 Organic matter content (O.M) % 4.33

Evaluation items and evaluation grades of soil physical properties Evaluation items Rating Rating Item unit Higher Middle class low class Bad Effective water content M3 / m3 0.12 or more 0.12 to 0.06 0.06 to 0.04 Less than 0.04 Porosity M3 / m3 0.6 or more 0.6 to 0.5 0.5 to 0.4 0.4 or less Permeability cm / s 10 ^-3 or higher 10 ^-3 to 10 ^-4 10 ^-4 to 10 ^-5 Less than 10 ^-5 Soil hardness mm Less than 2.1 21-24 24-27 27 or more

1) Effective water content is based on volumetric water content.

2) Permeability is based on saturation permeability coefficient.

3) Soil hardness is based on acid-fast food.

Evaluation items and evaluation grade of chemical properties of soil Evaluation items Rating Rating Item unit Higher Middle class low class Bad Soil acidity (pH) - 6.0 to 6.5 5.5 to 6.0
6.5 to 7.0 4.5 to 5.5
7.0 to 8.0 Less than 4.5
8.0 or higher Electrical conductivity dS / m Less than 0.2 0.2 to 1.0 1.0 to 2.5 1.5 or more Base replacement capacity
(CEC) cmol / kg 20 or more 20 ~ 6 Less than 6 Total nitrogen (T-N) % 0.12 or more 0.12 to 0.06 Less than 0.06 Available tannin acid content (Avail P2O5) mg / kg 200 or more 200-100 Less than 100 Substitutional potassium (K +) cmol / kg 3.0 or higher 3.0 to 0.6 Less than 0.6 Substitutional calcium (Ca ++) cmol / kg 5.0 or higher 5.0 to 2.5 Less than 2.5 Substitutional magnesium (Mg ++) cmol / kg 3.0 or higher 3.0 to 0.6 Less than 0.6 Salinity % Less than 0.05 0.05 to 0.2 0.2 to 0.5 0.5 or more Organic matter content (O.M) % 5.0 or higher 5.0 to 3.0 Less than 3.0

As shown in Tables 3 to 5, the artificial soil according to the embodiment of the present invention showed good permeability coefficient, effective water content, saturation absorption capacity and CEC as compared with conventional artificial soil.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover all such modifications and variations as fall within the true spirit of the invention.

Claims

30 to 60% by weight of mineral wool powder;
15 to 40% by weight of Cocopeat;
20 to 40% by weight of Bottom Ash; And
A first mixture mixed with 5 to 10% by weight of vermiculite and
And 10 to 20 parts by weight of water relative to 100 parts by weight of the first mixture.

The method according to claim 1,
The mineral powder is a by-product derived from the process of slugging a slug from a steel mill to 1,500 ° C or higher and processing the slug into a liquid state into a mineral wool. The mineral powder is a granular surface-shaped powder having a size of 5 to 10 mm Artificial soil composition.

The method according to claim 1,
The bottom ash is a coal ash generated from a thermal power plant and having a particle size of 0.6 to 10 mm.

The method according to claim 1,
Wherein the water contains a diluted natural plant physiologically active substance which promotes the growth of the plant to 800 to 1000 times.

5. The method of claim 4,
The natural plant physiologically active substance is humic acid or fulvic acid.

30 to 60% by weight of mineral wool powder; 15 to 40% by weight of Cocopeat; 20 to 40% by weight of Bottom Ash; And 5 to 10% by weight of vermiculite to prepare a first mixture; And
And mixing 10 parts by weight of water with 10 parts by weight of the first mixture.