KR20160043400A - Soil hardener and soil composition containing the same - Google Patents

Abstract

The present invention relates to a hardening agent for a soil composition, and to a soil composition cured by using the same and, more specifically, to a hardening agent for a soil composition, which comprises at least one selected from a group consisting of a mixture of chloride and inorganic oxide, coffee and wood; and ethylene glycol, and is capable of manufacturing a high-hardness soil composition by being added to a variety of natural soil aggregates around the site with cement, and to a high-hardness environmentally-friendly soil composition cured by using the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a curing agent for a soil composition and a soil composition containing the same. BACKGROUND ART [0002]

The present invention relates to a curing agent for a soil composition and a soil composition containing the curing agent. More particularly, the present invention relates to a curing agent for a soil composition capable of producing a soil composition with high strength by adding it together with cement to various natural soil aggregates around the site, And more particularly, to a soil-containing, environmentally friendly and high-strength soil composition.

Globally, it is necessary to use land efficiently by utilizing soft ground including coastal landfills in order to enlarge the land area and increase the utilization rate. The soft ground refers to the ground in a state where it can not support the upper structure, and the ground is composed mainly of clay, clay, and organic soil. Since the soft ground is mechanically unstable because of its high compressibility and small bearing capacity, there is a problem that ground subsidence occurs when the ground soil or excavation work is performed.

Particularly, it is difficult to solidify the byproducts from the marine landfill without removing water from the mud layer. However, it is difficult to solidify the mud layer by removing water from the mud layer. However, There is a problem in that a material of the secondary battery is generated, and a secondary environmental pollution problem occurs.

A method of increasing the strength of the ground by treating the soil hardener to improve the soft ground is proposed. In order to improve the hardenability of the fine clay soil, a technology using quartz (kaolin type) rich river sand, marine, and stone as substitute materials has been developed. However, due to the water content of the clay soil, There remains a problem that it is difficult to maintain a complete form of hardenability and constant stiffness, and development of a soil hardener having still better effect is desired.

In addition to the improvement of the soft ground, the soil hardener may be used to make the soil have appropriate strength and durability in the construction of civil engineering works, for example, a walkway, a yard, etc., or may be used in the production of construction materials using soil. In general, concrete has been used as a construction material in which sand and gravel are mixed with cement. However, as the demand and supply of sand and gravel used as aggregate are costly and time consuming and the interest in environmentally friendly materials has increased, Soil concrete using soil hardener is attracting attention as an eco-friendly low cost material.

Korean Patent No. 10-0023718 (July 07, 1987) Korean Patent Publication No. 10-2004-0059517 (July 7, 2004)

It is an object of the present invention to provide a curing agent for a soil composition capable of curing a soil component and an environmentally-friendly, high-strength soil composition containing the same.

According to an aspect of the present invention, there is provided a curing agent for a soil composition, which comprises a mixture of chloride and inorganic oxide, at least one selected from the group consisting of coffee and wood, and ethylene glycol.

In addition, the mixture of chloride and inorganic oxide may comprise ammonium chloride, magnesium chloride, calcium chloride, sodium chloride, magnesium magnesium, and ferric chloride.

In addition, the curing agent for the soil composition may further comprise fluorite.

The curing agent for the soil composition may further comprise 7 to 23 wt% of ammonium chloride, 7 to 23 wt% of magnesium chloride, 4 to 20 wt% of calcium chloride, 3 to 12 wt% of sodium chloride, 3 to 7 wt% of magnesium chloride, , At least one 11 to 50 wt% selected from the group consisting of coffee and wood, and 3 to 8 wt% of ethylene glycol.

In addition, the curing agent for the soil composition may further comprise 10 to 25 wt% of fluorite for 100 wt% of the total composition.

In addition, the curing agent for the soil composition may be solid.

In addition, the curing agent for the soil composition may further comprise a transparent aqueous waterproofing liquid.

According to another aspect of the present invention, there is provided a curing agent for a soil composition, soil; cement; And water. ≪ / RTI >

In addition, the soil may include fine particles having a particle size of 5 mm or less.

In addition, the fine particles may include fine sand.

In addition, the fine particles may include red mats.

The soil may further comprise at least one selected from the group consisting of sand, gravel, and crushed stone.

In addition, the soil composition may include 50 to 80 parts by weight of soil, 10 to 30 parts by weight of cement, 0.01 to 0.1 parts by weight of curing agent, and 5 to 25 parts by weight of water.

The curing agent for a soil composition according to one aspect of the present invention is excellent in adhesion and crosslinkability with soil particles, so that when treated in a soil, cohesion between soil particles can be improved. This makes it possible to form a stable ground or building material having a high compressive strength.

The curing agent for soil composition according to one aspect of the present invention can produce civil engineering and building structures using local soil at a construction site, so that manufacturing cost and manufacturing time can be reduced as compared with the conventional concrete composition.

The curing agent for soil composition according to one aspect of the present invention can neutralize and deodorize harmful heavy metals contained in the soil by ion substitution, thereby making eco-friendly civil engineering and building structures.

In addition, the soil composition according to another aspect of the present invention reduces the amount of cement contained in the soil composition compared to the conventional concrete composition, so that the construction cost can be reduced when the concrete composition is used in the civil engineering and construction fields instead of the conventional concrete composition.

In addition, the soil composition according to another aspect of the present invention is an eco-friendly material in which harmful heavy metals are not detected, and can reduce secondary environmental pollution caused by recycling and landfill disposal.

Further, the soil composition according to another aspect of the present invention can reduce environmental destruction since the need for development of rocks for the production of aggregate is reduced.

The present invention relates to a curing agent for a soil composition, characterized in that it comprises a mixture of a chloride and an inorganic oxide, at least one selected from the group consisting of coffee and wood, and ethylene glycol, and a soil composition made therefrom.

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

According to one aspect of the present invention, there is provided a curing agent for a soil composition.

The curing agent for the soil composition is a material containing chloride and inorganic oxide, and serves to mix and cement aggregate such as sand and cement. The curing agent for a soil composition of the present invention comprises a mixture of chloride and inorganic oxide, at least one member selected from the group consisting of coffee and wood, and ethylene glycol, so that the soil composition comprising the curing agent for the soil composition, It is possible to exhibit high strength characteristics even when the whole is replaced with a particulate soil having a particle size of 5 mm or less.

The mixture of the chloride and the inorganic oxide may be a mixture of compounds known in the art. For example, the mixture of chloride and inorganic oxide may be a mixture comprising ammonium chloride, magnesium chloride, calcium chloride, sodium chloride, magnesium acetate, and ferric chloride. Ferric chloride acts as a curing catalyst. The curing agent for the soil composition of the present invention may contain ferric chloride, which is more stable than ferrous chloride, as a curing catalyst in the curing agent in order to reduce the side reaction during the oxidation reaction.

Cement hardening is a chemical reaction that can cause toxic components that are harmful to the human body due to side reactions during the reaction. The curing agent for a soil composition of the present invention includes at least one selected from the group consisting of coffee and wood which are natural friendly materials, thereby reducing the side reaction during the curing reaction, thereby improving the safety of the soil composition. In addition, at least one selected from the group consisting of coffee and wood neutralizes and deodorizes the toxic substance, so that when contained in the soil composition, the physical properties of the soil composition are changed ecologically to be harmless to the human body. Further, the curing agent for soil composition of the present invention includes at least one selected from the group consisting of coffee and wood, thereby improving the binding force between the soil particles and improving the density of the soil. Preferably, at least one selected from the group consisting of coffee and wood is dried and then pulverized and added in powder form.

The coffee may be a fruit of coffee or a powder obtained by pulverizing a coffee tree. The fruit of the coffee may not be roasted or roasted, and it may be coffee residue left after extracting the coffee beverage.

The timber may be a stem and a branch of a tree which is dried to reduce the moisture content. In addition, in terms of selecting a material having a low water content and a low manufacturing cost, a pasture (dead tree) of 1,000 to 1,500 m in high- .

The ethylene glycol can improve the curing efficiency. When hydrogen is generated by the hydrothermal reaction, heat is generated, and the curing reaction rate can be improved by the generated heat.

Wherein the curing agent for the soil composition comprises 7 to 23 wt% of ammonium chloride, 7 to 23 wt% of magnesium chloride, 4 to 20 wt% of calcium chloride, 3 to 12 wt% of sodium chloride, 3 to 7 wt% of magnesium chloride, 1 to 5 wt% And at least one 11 to 50 wt% selected from the group consisting of wood and 3 to 8 wt% of ethylene glycol. When each component of the curing agent listed above is included in the above content range, the curing agent for soil composition and the soil particle are excellent in adhesion and crosslinking property, so that the environmentally friendly property and high strength property of the soil composition containing the curing agent for the soil composition are improved .

If necessary, the curing agent for the soil composition may further comprise fluorite.

The fluorite is a natural stone containing calcium fluoride as a main component and can improve the curing rate of the curing agent for the soil composition. More specifically, the fluorite can supplement calcium and sodium components to a curing agent for a soil composition, thereby improving the reaction rate during curing and reducing the side reaction. In addition, the fluorite can smooth the surface of the soil composition and improve the strength of the soil composition.

As the fluorite, it is preferable to use the blue zone collected in the Cornwall area. Preferably, the fluorite is pulverized and used in the form of a powder. Particles having a size of 200 Mesh (a size of the eye having a size of 74 μm between 200 inches and 1 inch in a plane standard) are preferably used.

The fluorite may be contained in an amount of 10 to 25 wt% based on the total 100 wt% of the curing agent for the soil composition of the present invention.

If necessary, the curing agent for the soil composition may further comprise a transparent aqueous waterproofing liquid. When the curing agent for the soil composition further comprises a transparent aqueous waterproofing liquid, the surface waterproofing property of the soil composition containing the waterproofing agent can be further improved. As the transparent aqueous waterproofing solution, those known in the art can be used.

Among the substances contained in the curing agent for a soil composition, in the case of a substance to be added in a solid phase, it is preferable that the material is pulverized and mixed in powder form, and particles having a uniform size of 200 Mesh are preferably selected. As the size of the substance to be added in the solid phase is smaller, the substance is dissolved in water. Therefore, in terms of improving water solubility, the substance to be added in a solid phase is preferably small in size. However, when the size is too small, An inadequate problem may arise.

The curing agent for the soil composition of the present invention may be solid. More specifically, it may be powdery or gel-like. It may be in the form of a gel when left at room temperature, and it may be in the form of a powder if it is shaken. When used to cure soil, it can be used after shaking to powder. The curing agent for the soil composition, which may be in the form of a powder or a gel, is excellent in mobility, storage stability and stability, and is water-soluble.

The curing agent for a soil composition of the present invention can cure soil as various natural soil aggregates around a construction site where concrete is required, and thus a soil composition having sufficient strength can be produced. When the soil composition is used as a building material, time and cost for construction can be reduced.

In addition, the curing agent for the soil composition of the present invention can be used for solidifying industrial wastes. The hardening agent for the soil composition may be added to the mixture of industrial waste, soil and cement to solidify the industrial waste by adding the hardening agent for the soil composition and the water. In this case, the hardening agent for the soil composition can reduce the humic acid ions present in the industrial waste, It can repel the adhered water on the surface and expose the soil particles to the outside. Later, calcium, the main component of the cement, can be solidified by bonding between the soil particles surrounding the industrial waste.

According to another aspect of the present invention, there is provided a curing agent for a soil composition, soil; cement; And water.

In the soil composition of the present invention, the curing agent for the soil composition may be added in an amount of 0.01 to 0.1 parts by weight. When the curing agent for soil composition is added in an amount of less than 0.01 part by weight, the reaction with the soil particles may be reduced to reduce the compressive strength of the soil composition. If the curing agent is added in an amount exceeding 0.1 part by weight, There may arise a problem of rising.

In the present invention, the soil may include clay, silty, sand, gravel, and the like, and it is preferable that the cement concrete mainly contains soil which is not used as an aggregate and which is a particulate soil having a particle size of 5 mm or less. The soil may take various soil forms depending on the soil, and may include, for example, but not limited to, marathon, clay, loess, kaolin, clays, mudstone, mud and high function low quality sludge. In terms of reducing manufacturing costs and manufacturing time, it is desirable that general local soils obtainable at the construction site be selected.

The particulate soil may comprise fine sand. Generally, the particles of the sand used as aggregate in the production of concrete are 5 to 25 mm, and the fine sand means sand having a particle size of 5 mm or less. The fine sand may be generated from construction waste. When the soil includes fine sand generated from construction waste, it is possible to improve the recycling rate of construction waste, so that an environmentally friendly and low-cost soil composition can be produced. Alternatively, the fine sand may be obtained by filtering the sand in the desert region with a 5 mm sieve. When the soil composition according to one embodiment of the present invention including the fine sand in the desert region is included in the construction of civil engineering structures and buildings in the desert region, problems due to the difficulty of aggregate supply and demand can be alleviated.

The particulate soil may comprise mud. The molluscs are high-function fine-grained soils, which can be generated as construction waste at coastal landfill sites and are expensive to treat. When the soil includes mud, it is possible to improve the recycling rate of construction waste, and thus it is possible to produce an environmentally friendly and low-cost soil composition. In addition, grains of Southeast Asia coast are particularly fine in size and have a gumming degree higher than those of other regions. Therefore, it is difficult to strengthen the ground and to form roads thereon. In another embodiment of the present invention The soil composition according to the present invention can contain a gumlike mica as soil component as described above, so that the construction cost can be reduced when it is used for construction of civil engineering structures and buildings in the coastal region of Southeast Asia.

If necessary, the soil containing the particulate soil as a main component may further include at least one selected from the group consisting of sand, gravel and crushed stone. The sand, gravel and crushed stone are used as aggregate to make conventional mortar or concrete, and may have a particle size of 5 to 25 mm. At least one selected from the group consisting of sand, gravel and crushed stone may be one containing quartz, mica, amphibolite, pyroxene, magnetite and volcanic glass. When at least one selected from the group consisting of sand, gravel and crushed stone is contained in the soil composition of the present invention, the large soil particles serve to enlarge the surface area to smooth the binding of the small fine particles, It is possible to improve the strength of the soil composition through its own properties, which have a particle size and a center of gravity.

The content of at least one member selected from the group consisting of sand, gravel and crushed stone is not particularly limited and may be appropriately used according to the soil contained in the soil composition. For example, in one embodiment of the present invention including fine sand as a main component, it may be included in an amount of 30 to 80 wt% with respect to 100 wt% of the soil, but is not limited thereto.

In the soil composition according to an embodiment of the present invention, the content of the soil is not particularly limited but may be 50 to 80 parts by weight. If the content of the soil is less than 50 parts by weight, the content of the cement in the soil composition to be produced may increase, and the production cost may increase. When the content of the soil is more than 80 parts by weight, There may be a problem with reinforcing (concrete).

In the soil composition according to another embodiment of the present invention, in order to increase the content of cement, the soil may be contained in an amount of 1 to 60 parts by weight in order to apply the composition to a site requiring ultrahigh strength.

The cement may be any known cement. For example, Portland cement may be used, but the present invention is not limited thereto. The Portland cement is prepared by thoroughly mixing raw materials containing lime, silica, alumina and iron oxide as main components in appropriate proportions and adding a gypsum as a curing agent to the sintered clinker, It is widely used as a base material for concrete, mortar, stucco and grout in the world.

In the soil composition according to one embodiment of the present invention, the content of the cement is not particularly limited but may be 10 to 30 parts by weight. The content of the cement is preferably as low as possible in terms of production cost and environment, but if it is less than 10 parts by weight, the compressive strength of the soil composition to be produced may be lowered. In addition, the content of the cement is preferably as high as improving the strength of the soil composition to be produced, but when it is more than 30 parts by weight, the eco-friendliness and the manufacturing cost reduction effect of the present invention are reduced in the production of the soil composition .

In the soil composition according to another embodiment of the present invention, the content of the cement may be in the range of 30 to 90 parts by weight in order to be applied to a site requiring ultrahigh strength.

The soil composition of the present invention can be prepared by mixing the curing agent for the soil composition, the soil, the cement and water. More particularly, the present invention relates to a process for preparing a soil and a cement mixture by mixing the soil and the cement to prepare a curing solution by dissolving the curing agent for the soil composition in a small amount of water, The soil composition of the present invention can be prepared by mixing and maintaining a slump and further adding water.

In the soil composition of the present invention, the content of water added may be adjusted depending on the selected soil, and may be 5 to 25 parts by weight, although not particularly limited thereto.

If desired, the soil composition of the present invention can be prepared by further containing additives. The additive may be at least one selected from the group consisting of a substance conventionally added in the production of cement and concrete in the art, a substance which enhances the binding force between soil particles and a substance which imparts functionality to the soil composition to be produced. For example, the soil composition of the present invention can be prepared by further including an admixture, a pigment, and the like. The mixing ratio of the soil composition which is changed due to the above additives can be adjusted based on the general knowledge of those skilled in the art.

The soil composition of the present invention is excellent in adhesion between soil particles, and therefore can have excellent strength. Further, since the fine soil particles are agglomerated, the porosity between the particles is reduced, and it is possible to have excellent crack prevention function and waterproofness.

Further, since the soil composition of the present invention does not contain harmful components to humans but is manufactured including vegetable components, it is environment-friendly, and it is suitable to be used for residential construction materials because it is deodorized.

In addition, the soil composition of the present invention is environmentally friendly because it reduces the development of rocks for the production of aggregate and thus can reduce environmental destruction.

Hereinafter, the present invention will be described in more detail with reference to the following examples and comparative examples in order to facilitate understanding of the present invention. It will be apparent to those skilled in the art that these embodiments are illustrative of the present invention and are not intended to limit the scope of the appended claims and that various changes and modifications may be made to the embodiments within the scope and spirit of the invention , And it is natural that such variations and modifications fall within the scope of the appended claims.

Example

[Production Example 1]

Ammonium chloride, magnesium chloride, calcium chloride, sodium chloride and wood powder were pulverized with a jet mixer and mixed to prepare a powder mixture. The powder mixture was mixed with a liquid mixture prepared by mixing magnesium chloride, magnesium ferric chloride, ethylene glycol, and the powder mixture to form a kneaded form. The mixture was pulverized to 200Mesh with a jet mill before complete hardening, To prepare a curing agent. The content of the above materials was adjusted to be 15.0 wt% of ammonium chloride, 15.0 wt% of magnesium chloride, 11.0 wt% of calcium chloride, 7.0 wt% of sodium chloride, 5.5 wt% of magnesium chloride, 38.0 wt% of wood powder and 3.0 wt% Were mixed to prepare a curing agent for the soil composition.

[Production Examples 2 to 8]

A curing agent for a soil composition was prepared in the same manner as in Preparation Example 1, except that the components and the contents (wt%) shown in Table 1 were used. Magnesium chloride, ferric chloride, ethylene glycol and a transparent aqueous waterproofing liquid are mixed in a liquid phase and the other components except powdered magnesium, ferric chloride, ethylene glycol and transparent waterproofing liquid are mixed in powder form.

Composition of curing agent for soil composition (wt%) Production Example 1 Production Example 2 Production Example 3 Production Example 4 Production Example 5 Production Example 6 Production Example 7 Production Example 8 Sat
For both composition
circa
anger
My
phrase
castle
castle
minute NH ₄ Cl 15.0 15.0 14.0 14.0 17.0 14.0 22.0 22.0 MgCl ₂ 15.0 15.0 14.0 14.0 17.0 14.0 22.0 22.0 CaCl ₂ 11.0 11.0 10.0 8.0 13.0 10.0 20.0 20.0 NaCl 7.0 7.0 7.0 6.0 8.0 7.0 11.0 11.0 MgO 5.5 5.5 5.5 6.0 5.0 5.5 7.0 7.0 Ethylene Glycol 5.5 5.5 5.5 6.0 5.0 5.5 8.0 - FeCl ₃ 3.0 3.0 3.0 2.0 3.0 3.0 5.0 5.0 Wood powder 38.0 - 19.0 22.0 12.0 - - 8.0 Coffee powder - 38.0 - - - 18.0 - - Fluorite powder - - 18.0 19.0 16.0 19.0 - - Transparent waterproofing liquid - - 4.0 3.0 4.0 4.0 5.0 5.0 Sum 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0

[Example 1]

10 kg of a 5-mm sieve, 60 kg of loess, and 340 kg of cement were mixed and stirred. Then, 1 kg of the curing agent for the soil composition of Preparation Example 1 was added to 245 L of water, and the mixture was added to the soil and cement mixture. The slurry was kept at 9 cm and blended to prepare a soil composition.

[Examples 2 to 14 and Comparative Examples 3 to 4]

A soil composition was prepared in the same manner as in Example 1, except that the ingredients, the contents and the slump conditions were as shown in Table 2 below. For reference, the weight of all the materials used in Table 2 below is the basis weight for 1 m ³ of soil composition.

[Comparative Example 1]

A soil composition was prepared in the same manner as in Example 1 except that no curing agent for the soil composition was added.

[Comparative Example 2]

In place of the curing agent for the soil composition of the present invention, 1.7 kg of an alkali-free system (ROADCON-LF5000: hypoallergenic high-strength liquid quick-setting agent) as a general admixture was used and FLY-ASH (SiO2, Al2, O2 , MULLITE consisting of FeO2, a mixture of QUARTZ and MAGNETITE) was added to the soil composition.

Ingredients and weight of materials used (kg) slump
(cm) Fine aggregate
(5 mm or less)
Royal
(5-25
mm) cement Soil hardening
Composition additive water Type 1 content Type 2 content Kinds content Kinds content Example 1 Masato 1,080 ocher 60 - 340 Production Example 1 One - - 245 9 Example 2 Masato 1,080 ocher 60 - 340 Production Example 2 One - - 245 9 Example 3 Masato 1,080 ocher 60 - 340 Production Example 3 One - - 245 9 Example 4 Masato 1,080 ocher 60 - 340 Production Example 4 One - - 245 9 Example 5 Masato 1,080 ocher 60 - 340 Production Example 5 One - - 245 9 Example 6 Masato 1,080 ocher 60 - 340 Production Example 6 One - - 245 9 Example 7 Masato 370 ocher 60 630 300 Production Example 3 One - - 420 9 Example 8 clay 890 - - 130 340 Production Example 3 One - - 245 10 Example 9 Tidal flat soil 430 - - 570 240 Production Example 3 One - - 245 10 Example 10 Mixed soil 1,080 ocher 60 - 300 Production Example 3 One - - 245 10 Example 11 china clay 1,080 - - - 300 Production Example 3 One - - 245 9 Example 12 Fertilizer
Slug 600 ocher 80 400 240 Production Example 3 One - - 245 9 Example 13 Season
Slug 520 ocher 60 530 240 Production Example 3 One - - 245 9 Example 14 Fine sand 430 - - 570 320 Production Example 3 One - - 245 10 Comparative Example 1 Masato 1,080 ocher 60 - 340 - - - - 245 9 Comparative Example 2 Masato 1,080 ocher 60 - 340 Alkaline-free system 1.7 FLY-ASH 0.7 245 9 Comparative Example 3 Masato 1,080 ocher 60 - 340 Production Example 7 One - - 245 9 Comparative Example 4 Masato 1,080 ocher 60 - 340 Production Example 8 One - - 245 9

[Test Example]

The properties of the soil compositions prepared in the above Examples and Comparative Examples were measured and the results are shown in Table 3 below. A standard specimen was used and a specimen of 28 days old was used.

1. Compressive strength measurement

The compressive strengths of Examples 1 to 14 and Comparative Examples 1 to 4 were measured. The compressive strength was measured using KS F 2405: 2010 method, and the measured strengths are shown in Table 3 below.

2. Measurement of bending strength

The flexural strengths of Examples 1 to 14 and Comparative Examples 1 to 4 were measured. The bending strength was measured using KS F 2408: 2010 method, and the measured strengths are shown in Table 3 below.

3. Heavy metal detection measurement

The degree of detection of heavy metals was measured in Example 3. Lead (Pb), cadmium (Cd) and mercury (Hg) were measured using the IEC 62321-5 Ed.1.Ib: 2013 (AAS) method and chromium (Cr (VI)) was measured according to IEC 62321-5 Ed. 1.Ib: Measured using the 2008 (UV / Vis) method. The measured values are shown in Table 4 below.

4. Measurement of deodorization performance

The ammonia deodorizing performance was measured in Example 3. KICM-FIR-1085 method, and the measured values are shown in Table 5 below. The test piece was 40 × 40 × 10 (mm).

5. Antimicrobial and antifungal performance measurement

The antibacterial and antifungal performance was measured in Example 3. Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 15442 were used as fungi. Fungi ( Aspergillus niger ATCC 9642, Penicillium pinophilum ATCC 11797, Chaetomium globosum ATCC 6205, Gliosiadium virans ATCC 9645, Aureobasidium pullulans ATCC 15223). Antimicrobial activity was measured by KICM-FIR-1002 method and antifungal activity was measured by ASTM G-21 method. The measured values are shown in Tables 6 and 7 below. In the measurement of antibacterial activity, the number of bacteria on the medium was calculated by multiplying by dilution factor.

division Compressive strength
(MPa) Flexural strength
(MPa) Example 1 24.5 4.0 Example 2 24.2 3.9 Example 3 27.3 4.6 Example 4 26.7 4.3 Example 5 25.6 4.1 Example 6 25.2 4.1 Example 7 24.5 4.0 Example 8 22.8 3.7 Example 9 19.3 3.1 Example 10 22.5 3.6 Example 11 25.6 4.1 Example 12 18.0 2.9 Example 13 21.0 3.4 Example 14 24.1 3.9 Comparative Example 1 5.7 0.9 Comparative Example 2 19.8 3.2 Comparative Example 3 22.3 3.6 Comparative Example 4 21.8 3.5

Referring to Table 3, it can be seen that Examples 1 to 14, which are soil compositions according to the present invention, have compressive strength that can be utilized for reinforcing packing materials for civil engineering and construction, structural materials, or soft grounds.

It can be confirmed that in the case of Examples 1 to 8, Examples 10 to 11 and Examples 13 to 14, a high compressive strength of at least 21.0 MPa and a maximum of 27.3 MPa and a high flexural strength of at least 3.4 MPa and a maximum of 4.6 MPa . The compressive strength generally required for concrete used for construction materials and the like is 20 MPa. In the case of Examples 1 to 8, Examples 10 to 11 and Examples 13 to 14, the concrete is replaced with a conventional concrete, It can be confirmed that it has excellent strength without any problem.

In the case of Examples 9 and 12 to 14, the compressive strength of at least 18.0 MPa, the maximum of 24.1 MPa, the lowest compressive strength of 2.9 MPa and the maximum of 3.9 MPa including the tidal-flat soil, slag and fine sand, It can be confirmed that the flexural strength is as high as MPa. The soil composition of the present invention having the above-described compressive strength can be utilized for reinforcement and burial of soft ground.

It can be confirmed that Comparative Examples 1 to 4 containing no curing agent of the present invention had lower compressive strength and flexural strength than Examples 1 to 7. Comparative Example 1 which did not contain a curing agent and an admixture showed very low strength and Comparative Example 2 containing an alkali-free admixture instead of the curing agent of the present invention was prepared in Examples 1 to 7 containing the curing agent of the present invention Compared with those of the others. It can be confirmed that Comparative Example 3 and Comparative Example 4 which do not contain coffee, wood or ethylene glycol have lower strength than Examples 1 to 7.

Examples 1 to 14, which are soil compositions of the present invention, can replace the coarse sand or gravel which is difficult to supply and receive, so that local soil of all the components collected in the vicinity of the construction site can be used as aggregate, Can be used instead. When the soil composition of the present invention is used as a civil engineering and building material in place of conventional concrete, the need to develop rocks for the production of coarse sand or gravel is reduced, thereby reducing the environmental destruction problem.

Hazardous substance release (mg / kg) Pb CD Cr (VI) Hg Example 3 Not detected Not detected Not detected Not detected

Referring to Table 4, it can be confirmed that heavy metals such as Pb (lead), Cd (cadmium), Cr (VI) (chromium) and Hg (mercury) are not detected in the soil composition of the present invention.

Elapsed time (minutes) Blank Concentration (ppm) Sample concentration (ppm) Deodorization rate (%) Example 3 30 470 45 90.4 60 427 38 91.1 90 378 28 92.6 120 332 20 94.0

In Table 5, Blank was measured in the state in which the sample of Example 3 was not added, and the sample concentration was measured in the state in which the sample of Example 3 was placed.

Referring to Table 5, it can be confirmed that the soil composition of the present invention has excellent deodorizing performance. It is advantageous to be used as building materials.

Test Items Culture test period One week after 2 weeks Three weeks Four weeks Example 3 Antifungal test 0 0 0 0

Referring to Table 6, it is not possible to recognize the growth of bacteria in the sample until one month has elapsed, and it can be confirmed that the soil composition of the present invention has excellent antifungal performance.

Test Items Sample classification Initial concentration
(CFU / 40p) Concentration after 24 hours
(CFU / 40p) Bacterial reduction rate (%) Antibacterial test with Escherichia coli Example 3 382 1150 - BLANK 382 One 99.7 Antibacterial test with Pseudomonas aeruginosa Example 3 374 1133 - BLANK 374 One 99.7

In Table 7, Blank was measured in the state in which the sample of Example 3 was not added.

Referring to Table 7, it can be confirmed that the soil composition of the present invention has excellent antibacterial activity.

The soil composition comprising the curing agent for the soil composition of the present invention has excellent strength, neutralizes and deodorizes toxic heavy metals by ion substitution, and can be used as a material for eco-friendly civil engineering and building structures because of its excellent antibacterial action.

Claims (13)

A mixture of a chloride and an inorganic oxide, at least one selected from the group consisting of coffee and wood, and ethylene glycol.
The curing agent for a soil composition according to claim 1, wherein the mixture of chloride and inorganic oxide comprises ammonium chloride, magnesium chloride, calcium chloride, sodium chloride, magnesium magnesium, and ferric chloride.
The curing agent for a soil composition according to claim 1, further comprising fluorite.
The process according to claim 2, further comprising the steps of: 7 to 23 wt% of ammonium chloride, 7 to 23 wt% of magnesium chloride, 4 to 20 wt% of calcium chloride, 3 to 12 wt% of sodium chloride, 3 to 7 wt% of magnesium chloride, And 11 to 50 wt% of at least one selected from the group consisting of wood and wood, and 3 to 8 wt% of ethylene glycol.
The curing agent for soil composition according to claim 4, further comprising 10 to 25 wt% of fluorite, based on 100 wt% of the total amount of the curing agent for the soil composition.
The curing agent for a soil composition according to claim 1, wherein the curing agent for the soil composition is in a solid form.
The curing agent for a soil composition according to claim 1, wherein the curing agent for the soil composition further comprises a transparent waterproofing liquid.
A curing agent for a soil composition according to any one of claims 1 to 7;
soil;
cement; And
Lt; RTI ID = 0.0 > water. ≪ / RTI >
9. The soil composition according to claim 8, wherein the soil comprises fine particles having a particle size of 5 mm or less.
10. The soil composition of claim 9, wherein the particulate comprises fine sand.
10. The soil composition of claim 9, wherein the particulate comprises mats.
The soil composition according to claim 9, wherein the soil further comprises at least one selected from the group consisting of sand, gravel and crushed stone.
9. The soil composition according to claim 8, which comprises 50 to 80 parts by weight of soil, 10 to 30 parts by weight of cement, 0.01 to 0.1 parts by weight of curing agent for soil composition, and 5 to 25 parts by weight of water.