KR20150128610A - Biopolymer-containing gel bar, producing method of the same, and construction method for soil erosion resistance improvement using the same - Google Patents

Abstract

The present invention relates to an eco-friendly processing method for enhancing resistance to soil erosion. More specifically, the present invention relates to a biopolymer-containing gel bar, a method for producing the biopolymer-containing gel bar, and a construction method for enhancing resistance to soil erosion using the biopolymer-containing gel bar.

Description

TECHNICAL FIELD [0001] The present invention relates to a biopolymer-containing gel bar and a method for enhancing erosion resistance of a soil using the biopolymer-containing gel bar.

The present invention relates to a biopolymer-containing gel bar, a process for producing the biopolymer-containing gel bar, and a method for enhancing the erosion resistance of the soil using the biopolymer-containing gel bar.

The geotechnical composition of the soil, strictly speaking, the particle size distribution, the water content, and the organic content directly affect the soil erosion. Today, soil erosion has emerged as an important environmental problem because soil erosion has direct or indirect effects on desertification and climate change. Currently, desertification due to soil erosion is ongoing at one-third of the world's land area and is expanding to 12 million hectares of new desert every year. Soil erosion causes not only ecosystem disturbance but also degradation of agricultural land productivity, so it is urgent to develop a technology that can reduce or suppress it.

Conventional methods for inhibiting soil erosion are mainly proposed by providing a mesh or net on the soil surface to block external factors (water or wind) that cause erosion. However, this external installation structure is not only limited in performance but also has a limit in cost. Recently, techniques have been proposed for improving the soil resistance and improving resistance to erosion (U.S. Patent No. 4663067; U.S. Patent No. 5860770; U.S. Patent No. 7,407,993]. However, the above technologies are different from the environmentally friendly viewpoint because they depend on a method of injecting or distributing chemical products. Soil erosion is primarily due to the destruction of the surface ecosystem and the unfavorable side effects (burning or grazing). Therefore, to suppress effective soil erosion, the ecological environment of the soil should be restored.

The present invention relates to a biopolymer-containing gel bar for preventing soil erosion, a process for producing the biopolymer-containing gel bar, and a method for enhancing the erosion resistance of the soil using the biopolymer-containing gel bar.

However, the problems to be solved by the present invention are not limited to the problems described above, and other problems not described can be clearly understood by those skilled in the art from the following description.

A first aspect of the present invention provides a biopolymer-containing gel bar for soil erosion prevention comprising a biopolymer.

The second aspect of the present application relates to a process for preparing a biopolymer-containing solution, comprising mixing a biopolymer and a solvent, and then heating or dissolving the biopolymer in a solvent at 80 占 폚 or higher to obtain a biopolymer-containing solution; And cooling the biopolymer-containing solution to obtain a biopolymer-containing gel bar. The present invention also provides a method for producing a biopolymer-containing gel bar for soil erosion prevention.

A third aspect of the present invention provides a method for enhancing soil erosion resistance comprising injecting a biopolymer-containing gel bar according to the first aspect of the present invention into a soil.

The fourth aspect of the present invention is a soil-biopolymer mixture soil formed by stirring a solution obtained by applying heat to a biopolymer-containing gel bar according to the first aspect of the present invention with soil, and then curing the solution with temperature and / To improve the erosion resistance of the soil. The present invention also provides a method for enhancing soil erosion resistance.

According to an embodiment of the present invention, it is possible to provide an eco-friendly building material or member for preventing soil erosion using a biopolymer without depending on erosion factor blocking or chemical-chemical solution injection using a conventional mesh or net have.

Biopolymers are eco-friendly materials and can be applied to many fields, but it is difficult to achieve optimal conditions depending on the condition of the environment to be applied or the skill of the operator. However, the construction material or member for soil erosion prevention provided by the present invention, specifically, a gel bar type material having a standard mixing ratio, can be applied to anyone. This is because a high-concentration gel bar is liquefied when it is in a high-temperature state, so that it can be easily mixed with water in the field to make an aqueous solution of a desired concentration. Therefore, a long time is required in the process of producing an aqueous solution, There are advantages that can be solved.

In one embodiment of the present invention, the soil erosion resistance reinforcement construction method using a biopolymer has an excellent effect not only in the initial stabilization of the soil but also in the inhibition of the middle and long term erosion.

In one embodiment of the invention, the method of enhancing the erosion resistance of a soil using biopolymers may include soil conservation, large construction sites, the formation of dikes in rivers and watersheds, stabilization of roads and railroad embankments, And the like.

1 is a diagram illustrating a model of a biopolymer-containing gel bar according to one embodiment of the present invention.
2 is a schematic view showing a method of producing a biopolymer-containing gel bar according to one embodiment of the present invention.
FIG. 3 is a schematic diagram showing a bio-polymer-containing gel bar according to an embodiment of the present invention sprayed on a surface of a soil. FIG.
FIG. 4 is a schematic view showing injection of a biopolymer-containing gel bar according to one embodiment of the present invention into a soil using an injection device. FIG.
5 is a schematic view showing a method for producing a soil-biopolymer mixed soil according to an embodiment of the present invention.
6A and 6B show an example in which the soil-biopolymer mixture soil according to one embodiment of the present invention is applied to slopes.
7 is a photograph showing an example in which the soil-bio-polymer mixed soil according to one embodiment of the present application is applied as a vegetation mat.
8 illustrates a biopolymer processing process through heat treatment according to one embodiment of the present invention.
FIG. 9 is a graph showing the results of measuring the strength of a biopolymer treated soil (loess) according to an embodiment of the present invention.
10 is a graph showing a result of measuring the strength of a biopolymer treated soil (sand) according to an embodiment of the present invention.
FIG. 11 shows a rapid cooling and underwater curing condition treatment method of a biopolymer treated soil according to an embodiment of the present invention.
FIG. 12 is a graph showing the results of measurement of strength under rapid cooling and underwater curing conditions of a biopolymer treated soil according to an embodiment of the present invention. FIG.
FIG. 13 is a conceptual diagram of a method for manufacturing an eco-friendly soil building material using the thermal gelling biopolymer according to an embodiment of the present invention.
FIG. 14 is a conceptual diagram of a ground treatment method using a thermal gelling biopolymer according to an embodiment of the present invention.
15 is a photograph showing various types of biopolymer gel bars according to one embodiment of the present invention.
16 is a photograph showing various states of the soil-bio-polymer mixed soil according to one embodiment of the present invention.
17 is a graph showing shear strength evaluation results of the soil-biopolymer mixed soil according to one embodiment of the present invention.

Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

It should be understood, however, that the present invention may be embodied in many different forms and is not limited to the embodiments and examples described herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, it is to be understood that when an element is referred to as being "connected" to another element, it may be referred to as being "directly connected," as well as "electrically connected" And the like.

Throughout this specification, when a member is "on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

As used herein, the terms "about," " substantially, "and the like are used herein to refer to or approximate the numerical value of manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure. Also, throughout the present specification, the phrase " step "or" step "does not mean" step for.

Throughout this specification, the term "combination (s) thereof " included in the expression of the machine form means a mixture or combination of one or more elements selected from the group consisting of the constituents described in the expression of the form of a marker, Quot; means at least one selected from the group consisting of the above-mentioned elements.

Throughout this specification, the description of "A and / or B" means "A or B, or A and B".

Throughout the specification, the term "cationic aqueous solution " refers to an aqueous solution containing a cation, for example, it may include, but is not limited to, an aqueous solution containing alkali metal or alkaline earth metal ions. Wherein the alkali metal comprises a Group 1 metal consisting of Li, Na, K, Rb and Cs capable of providing monovalent cations, wherein the alkaline earth metal is selected from the group consisting of Be, Mg, Ca , Sr, Ba, and Ra.

Hereinafter, embodiments of the present invention are described in detail, but the present invention is not limited thereto.

A first aspect of the present invention provides a biopolymer-containing gel bar for soil erosion prevention, comprising a biopolymer. The biopolymer-containing gel bar may have an effect of enhancing frictional resistance between soil particles, for example, adhesion between soil particles or internal friction angle, but may not be limited thereto.

In one embodiment of the present invention, the biopolymer-containing gel bar may include, but is not limited to, about 100 parts by weight of the biopolymer to about 100 parts by weight of the solvent. For example, the biopolymer-containing gel bar may comprise from about 0.1 parts by weight to about 100 parts by weight, from about 10 parts by weight to about 100 parts by weight, from about 20 parts by weight to about 100 parts by weight of the biopolymer, 100 parts by weight, about 30 parts by weight to about 100 parts by weight, about 40 parts by weight to about 100 parts by weight, about 100 parts by weight or less, about 80 parts by weight or less, about 60 parts by weight or less, about 40 parts by weight or less, Or less, about 10 parts by weight or less, about 5 parts by weight or less, or about 1 part by weight or less. When the proportion of the biopolymer is too low, for example, less than about 0.1 part by weight, the concentration of the biopolymer may be poor and the gel may not be formed properly, Conversely, if the concentration is too high, e.g., greater than about 100 parts by weight, the viscosity will be too large to be hard, and gel formation and field application can be difficult.

In one embodiment herein, the solvent may include, but is not limited to, water or an alkaline solvent having a pH of about 7 or higher.

In one embodiment of the present invention, the biopolymer may be any polymeric material produced from an organism, but may not be limited thereto. The biopolymer may include a substance having glucose as a monomer. The biopolymer may be classified into a polysaccharide and an amino acid, and the biopolymer of the polysaccharide series may include Depending on its shape, it can be divided into high-molecular chains and gelation biopolymers. For example, the polymer chain biopolymer may include beta-1,3 / 1,6-glucan (Polycan ^™ ), alpha-glucan or curdlan, and the gelling biopolymer may include, But are not limited to, wetlan gum, gellan gum, xanthan gum, agar gum, or succinoglycan gum, and the like. For example, the amino acid-based biopolymer may include, but is not limited to, chitosan or gamma phage (gamma PGA). Also, for example, the biopolymer may include, but is not limited to, casein and / or polylysine.

A biopolymer is a high molecular substance produced by a living organism. It refers to a variety of polymer substances that are synthesized in organisms and secreted into the body, such as carbohydrates, fats, proteins, nucleic acids and their complexes. Particularly, water-soluble or insoluble polysaccharides are polymers produced by glycoside bonds of at least 10 monosaccharides or derived monosaccharides, and are the most abundant biomolecules in the human body. Unlike chemical synthetic polymers, they are environmentally friendly. Due to their functional properties such as gel formation, emulsion stability, surface tension control, water absorption, adhesion, lubrication, and biofilm formation, It is used as a major material in the industrial field.

In one embodiment of the invention, the biopolymer exhibits a low viscosity at elevated temperatures and may increase its viscosity as it cools, but may not be limited thereto. For example, the high temperature may be at least about 80 < 0 > C, but is not limited thereto. For example, although the biopolymer can be dissolved at a temperature of less than about 80 캜, it takes a long time to dissolve.

In one embodiment of the invention, the biopolymer exhibits a low viscosity at pH> 7 and may increase in viscosity below about pH 7, but may not be limited thereto.

In one embodiment of the present invention, the biopolymer may be, but not limited to, a gel formed upon cooling after heat treatment. The gel is formed due to an increase in viscosity at the time of cooling after the heat treatment, so that the structure of the biopolymer-containing gel bar is not disturbed and a uniform shape can be maintained.

In one embodiment of the present invention, the cooling may be, but not limited to, using natural cooling, or using a cooler or a refrigerant.

The biopolymer is soluble in water and is affected by temperature, water content, and pH. Also, because of the thermal gelation phenomenon, it is easy to make bar shape. The higher the temperature of the biopolymer aqueous solution is, the lower the viscosity, and the lower the temperature, the higher the viscosity. Also, the higher the water content, the lower the elasticity of the gel bar, and the lower the water content, the higher the elasticity of the gel bar. The thermo-gelatinized biopolymer is not finished after it is formed, but it can be re-formed with the soil when the temperature is lowered and the viscosity can be lowered again. Since the biopolymer has a reversible condition that hardens again when it is cooled, There are advantages.

In one embodiment of the present invention, the biopolymer-containing gel bar has moldability. Specifically, the biopolymer-containing gel bar can be easily molded and molded according to a desired size and shape, .

In one embodiment of the invention, the biopolymer-containing gel bar may be of a variety of standardized concentrations, but is not limited thereto.

In one embodiment of the present invention, the mixing ratio of the biopolymer with the material to be applied in the field is important. Since the biopolymer-containing gel bar according to the present invention has a gel bar shape, It is possible.

In addition, a great deal of time and effort is required to produce a highly concentrated biopolymer-containing solution at the construction site. However, using the biopolymer-containing gel bar prepared according to the present invention can significantly reduce such troubles, It can be used by putting a proper amount.

In one embodiment of the present invention, the biopolymer-containing gel bar can be utilized in the field of construction and construction using the above-described characteristics. In particular, it is possible to obtain a higher strength and durability than a soil structure (wall or column) using only a soil by mixing a biopolymer with a soil, and compared with a conventional method using a straw, (gypsum, cement, and the like), which can be overcome the problem of degradation in functionality due to degradation, and is advantageous in that the construction can be carried out with high environmental friendliness. The soil building material and member may be, for example, but not limited to, a wall, a floor, a brick, a block, a board, or a panel. The member means a subsidiary material for construction.

A model of a biopolymer-containing gel bar according to one embodiment of the present invention is shown in FIG.

The second aspect of the present application relates to a process for preparing a biopolymer-containing solution comprising mixing a biopolymer and a solvent and then heating or dissolving the biopolymer in a solvent at a temperature of at least about 80 占 폚 to obtain a biopolymer-containing solution; And cooling the biopolymer-containing solution to obtain a biopolymer-containing gel bar. The present invention also provides a method for producing a biopolymer-containing gel bar for soil erosion prevention. All of the contents described in the first aspect of the present application can be applied to the biopolymer-containing gel bar according to this aspect.

In one embodiment of the present invention, the biopolymer-containing solution may include, but is not limited to, about 100 parts by weight or less of the biopolymer relative to about 100 parts by weight of the solvent. For example, the biopolymer-containing solution may comprise from about 0.1 parts by weight to about 100 parts by weight, from about 10 parts by weight to about 100 parts by weight, from about 20 parts by weight to about 100 parts by weight of the biopolymer, About 40 parts by weight to about 100 parts by weight, about 100 parts by weight or less, about 80 parts by weight or less, about 60 parts by weight or less, about 40 parts by weight or less, about 20 parts by weight About 10 parts by weight or less, about 5 parts by weight or less, or about 1 part by weight or less.

In one embodiment herein, the solvent may include, but is not limited to, water or an alkaline solvent having a pH of about 7 or higher.

In one embodiment of the invention, it may further include, but is not limited to, shaping the biopolymer-containing gel bar to a desired shape and size.

In one embodiment of the invention, the biopolymer is readily soluble in a high temperature solvent of about 80 캜 or more. High temperature conditions are employed to increase the solubility of the biopolymer by heating at a high water content, while increasing the concentration of the biopolymer while partially evaporating the water. Upon reaching the desired concentration state, further heat transfer is blocked and allowed to cool until the biopolymer-containing solution becomes gelatinized. When the bio-polymer-containing solution is cooled, it is thermally gelated. If the gel is hardened, it may be cut and stored in a desired size and shape, but the present invention is not limited thereto.

In one embodiment of the invention, the biopolymer-containing solution is cooled to obtain a biopolymer-containing gel bar, whereby the pH of the biopolymer-containing solution is adjusted to less than about 7, But may be, but not limited to, promoting gelation. For example, the reduction of the pH value may be performed by adding an acidic aqueous solution having a pH of about 5 or less, but the present invention is not limited thereto.

FIG. 2 shows a schematic view of a method for producing a biopolymer-containing gel bar according to this aspect.

A third aspect of the present invention provides a method for enhancing soil erosion resistance comprising injecting a biopolymer-containing gel bar according to the first aspect of the present invention into a soil.

All of the contents of the first and second aspects of the present invention can be applied to the biopolymer-containing gel bar according to this aspect.

Soil erosion is affected by soil moisture, particle size distribution, organic matter content, and surface vegetation. In the case of a desert with severe soil loss, all of these conditions are poor. In order to improve the resistance to soil erosion, the nature of the soil itself must be improved rather than blocking external factors. For this purpose, it is required to maintain the soil moisture for a long period of time, to increase the cohesion between soil particles (cohesion), and at the same time, to have an environmentally friendly method in which vegetation can grow smoothly in the future. Conventional chemical treatment methods focus only on primary soil strength enhancement, so there is a lack of consideration for the creation of a vegetation environment to suppress permanent erosion.

In one embodiment of the invention, injecting the biopolymer-containing gel bar into the soil comprises spraying the biopolymer-containing gel bar onto the surface of the soil; Stirring the bio-polymer-containing gel bar with the soil; And / or injecting the biopolymer-containing gel bar into the soil using an apparatus, but the present invention is not limited thereto.

In one embodiment of the present invention, the biopolymer-containing gel bar penetrates into the soil after a lapse of time after the application of the biopolymer-containing gel bar onto the surface of the soil, and a schematic diagram related to the biopolymer-containing gel bar is shown in FIG.

In one embodiment of the invention, the soil may include but is not limited to those selected from the group consisting of fine clay (clay), granular (sand), and combinations thereof.

In one embodiment of the present invention, the biopolymer-containing gel bar may be injected into the soil, and then heat treatment or chemical treatment may be performed. However, the present invention is not limited thereto. The heat treatment method may include, but is not limited to, heating directly as heat by using a heating plate, or activating water molecules by using microwaves to generate heat.

In one embodiment of the invention, the biopolymer-containing gel bar may be injected into the soil, followed by spraying with water, an acidic aqueous solution, and / or a cationic aqueous solution. For example, an acidic aqueous solution having a pH of about 5 or less can be sprayed to further strengthen the structure of the biopolymer-containing gel bar mixed with the soil, but the present invention is not limited thereto. For example, by sprinkling warm water above normal temperature, the gel bar may be dissolved well, but it may not be limited thereto.

In one embodiment of the invention, injecting the biopolymer-containing gel bar into the soil using an injection device is shown in FIG.

In one embodiment of the present invention, the soil erosion resistance enhancing construction method may include, but is not limited to, spraying a solution obtained by liquefying the biopolymer-containing gel bar by applying heat to the biopolymer-containing gel bar.

In one embodiment of the invention, the biopolymer-containing gel bar may be added to the soil, followed by the addition of an alkali or alkaline earth metal cation. For example, a cation of an alkali metal such as Na ⁺ , K ⁺ , or an alkaline earth metal cation such as Ca ^{2 +} , Mg ^{2 +,} or the like may be added to induce additional gelation of the biopolymer to form a more solid soil But may not be limited.

In one embodiment of the invention, the biopolymer-containing gel bar may be injected into the soil, followed by addition of an acidic aqueous solution or a cationic aqueous solution having a pH of about 5 or less, . The cationic aqueous solution may include, for example, an aqueous solution containing a cation of an alkali metal or an alkaline earth metal.

Since the surface of the biopolymer according to the present invention is negatively charged, the addition of an alkali metal or an alkaline earth metal cation after being added to the soil can further improve the binding property with the soil.

In one embodiment of the present invention, the biopolymer-containing gel bar may be added to the soil, followed by heating and cooling the soil, but may not be limited thereto.

The fourth aspect of the present invention is a soil-biopolymer mixture soil formed by stirring a solution obtained by applying heat to a biopolymer-containing gel bar according to the first aspect of the present invention with soil, and then curing the solution with temperature and / To improve the erosion resistance of the soil. The present invention also provides a method for enhancing soil erosion resistance.

In one embodiment of the present invention, a schematic diagram of a method for producing the soil-biopolymer blended soil according to the present application is shown in Fig.

In one embodiment of the present invention, the soil-biopolymer mixture soil may include, but is not limited to, about 100 parts by weight or less of the biopolymer-containing gel bar with respect to about 100 parts by weight of the soil. For example, the soil-biopolymer mixture soil may comprise about 1 to about 100 parts by weight, about 20 to about 100 parts by weight, about 40 parts by weight of the biopolymer-containing gel bar, about 100 parts by weight of the soil, To about 100 parts by weight, from about 60 parts by weight to about 100 parts by weight, from about 80 parts by weight to about 100 parts by weight, from about 10 parts by weight to about 80 parts by weight, or from about 40 to about 80 parts by weight But may not be limited thereto.

In one embodiment of the invention, the heating may be adding water, but it is not limited thereto.

In one embodiment of the present invention, the method for enhancing erosion resistance of a soil includes heating and mixing the biopolymer-containing gel bar, soil, and water, and then curing the mixture by temperature reduction (cooling) But may include, but is not limited to, using a mixture of soil.

In one embodiment of the present invention, the soil erosion resistance enhancement construction method comprises heating and mixing the biopolymer-containing gel bar, soil, and water, followed by curing according to a decrease in pH value (pH less than about 7) But may include, but is not limited to, using soil-biopolymer blends. For example, the reduction of the pH value may be, but is not limited to, performed by adding an acidic aqueous solution having a pH of about 5 or less. The soil-biopolymer mixture soil according to the present invention may be used in soil, Are mixed at a proper temperature and a water content ratio, and the biopolymer serves to stabilize the soil due to excellent binding force.

In one embodiment of the invention, the soil may be heated but may not be limited thereto.

In one embodiment of the invention, the cooling may include, but is not limited to, natural cooling or rapid cooling.

In one embodiment of the present invention, it may include, but is not limited to, curing the mixture of soil, water, and biopolymer in a mold to produce the soil-biopolymer mixture soil having a desired shape and size have. For example, the mixed soil may be manufactured in various shapes such as a brick shape, a column shape, or a panel shape.

In one embodiment of the invention, the soil-biopolymer blend soil may be, but is not limited to, being applied as a method of agitation with the soil and / or application to the soil.

In one embodiment of the present invention, the agitation with the soil may be, but not limited to, stirring the soil-biopolymer mixture with heat after applying the soil mixture.

The soil-biopolymer mixture soil according to the present invention exhibits superior stability to existing soil by having excellent binding force between the biopolymer and the soil. In addition, the soil-biopolymer mixture soil can be applied immediately on the site in the field, so it is economical to shorten the air, and anyone can work easily and is manufactured with eco-friendly materials. There are advantages.

In one embodiment of the present invention, when the mixed soil is used to increase the erosion resistance of the soil, the mixed soil may be subjected to additional heat treatment, but the present invention is not limited thereto. In addition, the use of the above-mentioned mixed soil may be different depending on the presence or absence of the additional heat treatment, but the present invention is not limited thereto. For example, a mixed soil without additional heat treatment can be used as an embankment or a filling material, and the mixed soil produced by performing additional heat treatment can be used as a brick, a block, or a soil packing material. The heat treatment method may include, but is not limited to, heating directly as heat by using a heating plate, or activating water molecules by using microwaves to generate heat.

In one embodiment of the invention, the application may be, but is not limited to, application to the soil-biopolymer blend soil after application of heat to the soil-biopolymer blend soil, or application to a desired site. The application of heat to the mixed soil during application may increase the adhesive force, but may not be limited thereto.

Examples of application of soil-biopolymer mixed soil according to the present invention to a slope are shown in Figs. 6A and 6B.

In one embodiment of the present invention, the soil-biopolymer mixture soil may be applied as an eco-friendly flooring material, but it is not limited thereto.

In one embodiment of the present invention, the vegetation mat may be prepared by raising grass in the soil-biopolymer mixture soil, but the present invention is not limited thereto. An example in which the soil-biopolymer mixture soil according to the present application is applied as roll grass is shown in Fig.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following Examples are given for the purpose of helping understanding of the present invention, but the present invention is not limited to the following Examples.

[ Example ]

Various laboratory experiments were carried out to verify the soil erosion inhibition effect of biopolymer. In this embodiment, agar gum (Samchun Pure Chemical, CAS 9002-18-0) and gellan gum (Sigma-Aldrich, CAS 71010-52-8) were used as a thermal gelation biopolymer, 1) was used.

Example  One: Biopolymer - Preparation of gel-containing gel

A high viscosity biopolymer-containing aqueous solution was obtained by mixing 40 parts by weight (based on the total weight of the aqueous solution) of gellan gum, which is a biopolymer, with distilled water at a high temperature (not lower than 80 ° C). Herein, in case of gellan gum, 50%). The obtained biopolymer-containing aqueous solution was cooled to obtain a biopolymer-containing gel bar. The bio-polymer-containing gel bar according to the present embodiment has advantages of easy weight control and molding, safe and easy manufacturing process, and can be manufactured with a constant composition. In this connection, Fig. 15 shows a biopolymer-containing gel bar produced according to this embodiment: (a) a biopolymer-containing gel bar, (b) Easy bio polymer-containing gel bar, (d) before mixing with soil, and (e) after mixing with soil.

Example  2: Using heat treatment Biopolymer - Mixture of containing gel bar and soil

Regardless of the type of soil, a biopolymer aqueous solution and soil were prepared by dissolving the biopolymer-containing gel bar at high temperature to mix the biopolymer-containing gel bar and soil using thermal gelation. After dissolving the biopolymer-containing gel bar in a solvent (water) at a high temperature (80 ° C), it was mixed with the heated soil to prevent premature gelation due to abrupt temperature drop. The important point in forming a high-temperature biopolymer-containing aqueous solution is that the concentration of the biopolymer (the solubility of the solvent) should be appropriately controlled. Usually, the baby absorbs water that is 20 times its own mass due to its hydrophilic property at normal temperature. Its solubility increases with increasing temperature.

The high temperature biopolymer-containing aqueous solution was mixed homogeneously with high temperature soil and mixed below 60% (solution weight with respect to soil weight) and less than 30% with sand soil. After mixing, it can be molded in air or water by cooling after molding to fit the desired purpose. A summary of this process is shown in FIG.

Example  3: soil - Biopolymer  Cooling and curing method of mixed soil

Various soil - biopolymer blends were prepared using loess and sand in indoor conditions and their strength was measured. Agar and gellan gum contents were adjusted to 1% and 3%, respectively, for each soil. The initial water / soil composition ratio was 60% for loess and 30% for water / soil mixture . The strength of the specimen subjected to air cooling and air curing in air after compounding is shown in FIG. 9 (yellow soil) and FIG. 10 (sand). According to the results of FIGS. 9 and 10, it was confirmed that the compression strength of the soil was greatly increased by the mixing of the biopolymer. Especially, it was confirmed that the maximum strength of the loess soil reached 12 MPa, forming a very hard soil composition. This shows that both agar and gellan gum are negatively charged, forming a firmer bond with the loess particles bearing surface charge.

However, volumetric strain behaviors of up to 20% in the case of air cooled and air - cured Hwangto specimens have been investigated. As shown in Fig. 8, the specimen was cooled in cold water immediately after mixing and immediately after molding (3% agar gum and 3% gellan gum) in cold water (Fig. 11). As a result of air curing of the specimen after sufficient cooling, it was confirmed that the final drying shrinkage was reduced to less than 10%. Therefore, it has been confirmed that the initial gelation of the soil-biopolymer mixture soil is very important to prevent drying shrinkage. For this, various methods such as cold water, refrigerant, cold air, or refrigeration can be applied.

Finally, to confirm the behavior of rapid cooling and underwater curing conditions, specimens were prepared, immersed in water, and cured for a long period of time. Long-term flooded and saturated soil has little compressive strength, whereas soil-biopolymer mixed soil has a compressive strength of 50 kPa to 200 kPa even under flooding condition for 28 days, and the strength of soil-biopolymer mixture soil is effective even underwater (Fig. 12). Uniqueness is that the volume change of the soil-biopolymer mixed soil is close to 0% in the case of rapid cooling and underwater curing. As a result, it was confirmed that the application of biopolymer to underwater and submerged condition can be used as a very stable ground injection and treatment agent because of no volume change.

Example  4: Review of durability against water

In order to investigate the durability of the thermal gelation soil - biopolymer blends, water retention and strength measurements were performed on the most sensitive conditions, natural cooling and air - curing specimens. Two months after curing, the specimens were immersed in water for one week. On the 7th day after immersion, the compressive strength and the volume expansion rate were evaluated.

In case of 3% treated agar gum, the final dry strength of 12 MPa was lowered to 600 kPa after immersion, whereas the dry strength of gellan gum 3% treated soil decreased from 10 MPa to 500 kPa after immersion Results. Importantly, in all cases, the specimens retained their original shape, with some volume expansion due to water absorption (see Table 1, below).

[Table 1]

In this regard, FIG. 13 is a conceptual diagram of a method of manufacturing an eco-friendly soil building material using the thermal gelation biopolymer according to one embodiment of the present invention. When the soil gluing material (wall, panel, brick, or the like) is manufactured by using the thermal gelation biopolymer in the method shown in Fig. 13, a high strength and high durability building material can be realized. The thermal gelation biopolymer has a low viscosity at a temperature of 80 ° C or higher and forms a high-viscosity gel-matrics when it is cooled to 40 ° C or lower. Therefore, It is important not to lose the high temperature until the step. Therefore, if the mixture is prepared in a state where the soil and the biopolymer-containing solution are respectively heated and maintained at a specific temperature (for example, 80 DEG C) or more, and the mixture is poured into a mold, Various shapes can be realized according to the mold or the mold. After being poured into the mold, it hardens while being cooled to 40 ° C or less. At this time, natural cooling may be performed in air, or metal cooling may be performed by using water or other refrigerant. Since the thermal gelation biopolymer according to the present embodiment is very low in permeability, it has been confirmed that the structure of the soil is not disturbed even if it is initially immersed in water. Therefore, by utilizing these advantages, Can be made.

Overall, it was confirmed that the dirt-biopolymer mixed soil according to the present invention is superior in water durability. Therefore, the high temperature biopolymer solution can be directly injected into the ground or agitated for reasons of shielding in the ground, shielding purpose or other reinforcement. The concrete implementation method is shown in Fig.

Example  5: Biopolymer - soil with gel bar - Biopolymer Mixed soil  Produce

The present embodiment is based on the fact that the specific heat of the soil is lower than that of water and the temperature becomes high quickly, and that it can be easily worked by using a pig tail hot water heater and a cement mixer which can be easily used in the field. Since the bio-polymer-containing gel bar has a high concentration, the concentration of the aqueous solution was lowered by using water, and the amount of water was determined and poured into the container together with the soil to be mixed. Then, using a pig tail warm water heater, the water and soil were heated to the highest possible temperature, and then a biopolymer-containing gel bar was placed in the soil-filled barrel. After that, the pork tail was heated a little more with a hot water heater and mixed with a cement mixer. It should be noted that biopolymer-containing gel bars may come in direct contact with the pig tail warm water heater, so be careful not to touch them directly. In addition, since the water may evaporate during heating or mixing, the amount of water is calculated in consideration thereof.

Example  6: Biopolymer - Containing soil with aqueous gel bar solution - Biopolymer mix Toe manufacturing

Water has a high specific heat in soil and therefore does not easily cool once boiling. Thus, a biopolymer-containing gel bar is put into hot water to prepare an aqueous solution, and the prepared aqueous solution is mixed with the soil. An advantage of this method is that the biopolymer-containing aqueous solution and the soil can be mixed more homogeneously.

Example  7: Soil - Biopolymer  Preparation and strength evaluation of mixed soil

100 g of water and 3.3 g of gellan gum were mixed to obtain a biopolymer gel bar. 30 parts by weight of the obtained biopolymer gel bar was mixed with 100 parts by weight of the soil to obtain a soil-biopolymer mixture soil. Here, natural sand was used as the soil. FIG. 16 is a photograph showing the state (a) immediately after mixing of the soil-biopolymer mixture soil obtained, (b) the process of applying additional heat, and (c) the state of heating using electromagnetic waves. The results of the shear strength evaluation using the direct shear tester of the soil-biopolymer mixed soil obtained above are shown in Fig. According to the results shown in Fig. 17, the adhesive force between the soil particles can be increased by about 20 kPa only by mixing the biopolymer gel bar with the natural sand in this embodiment, compared with the natural sand having the adhesive force of 0 kPa. Further, it was confirmed that when the soil-biopolymer mixed soil was further heated, the strength of the soil was further increased. This is because the adhesive force increases to about 55 kPa and the intergranular friction angle (friction coefficient) also increases.

Example  8: soil - Biopolymer Mixed soil  Used Vegetation  Mat manufacture

Usually vegetation mats or field-mounted vegetation rolls are mostly composed of soil or cultivated soil, vegetation, auxiliary fibers or adhesives. In this embodiment, a vegetation mat manufacturing technique using a biopolymer-containing gel bar is proposed instead of using an artificial / chemical adhesive / binder.

The biopolymer-containing gel bar may be directly used as described above, or the biopolymer-containing gel bar may be diluted and mixed with the soil in a solution state. Alternatively, seeds may be mixed together or formed into a panel or a mat, It is a technology to plant vegetation on biopolymer-soil mixture soil by sowing seedlings. The vegetation mat of the present embodiment may be used in the form of a panel or a mat having a length and a length of 10 cm to 100 cm, respectively, or in the form of a continuous roll. A photograph of a concrete example of this is shown in Fig.

This method is intended to improve the vulnerability of the slope stabilization method using existing vegetation to the slope or slope. When grass is cultivated in a soil mixed with a biopolymer-containing gel bar instead of conventional soil in the process of cultivating flat grass and lawn grass, the roots of the plant catch the soil, so that the soil and plant compounded with the biopolymer are naturally seated during the field construction have.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention .

Claims (16)

A biopolymer-containing gel bar for soil erosion prevention, containing a biopolymer.
The method according to claim 1,
Wherein the biopolymer-containing gel bar comprises not more than 100 parts by weight of the biopolymer relative to 100 parts by weight of the solvent.
The method according to claim 1,
The biopolymer may be selected from the group consisting of beta -1,3 / 1,6-glucan, alpha glucan, curdlan, wellan gum, gellan gum, xanthan gum, agar those selected from the group consisting of gum, succinoglycan gum, chitosan, gamma PGA, casein, polylysine, and combinations thereof Bio-polymer-containing gel bars for soil erosion prevention.
The method according to claim 1,
Wherein the biopolymer exhibits a low viscosity at elevated temperatures and an increase in viscosity as it cools.
The method according to claim 1,
Wherein the biopolymer exhibits a low viscosity at pH 7 or higher and the viscosity increases as the pH value is lower than 7. The biopolymer-containing gel bar for soil erosion prevention.
The method according to claim 1,
The biopolymer-containing gel bar for soil erosion prevention, wherein the biopolymer has moldability.
Mixing the biopolymer and the solvent and then heating or dissolving the biopolymer in a solvent of 80 DEG C or higher to obtain a biopolymer-containing solution; And
Containing solution to obtain a biopolymer-containing gel bar
Containing gel bar for soil erosion prevention.
8. The method of claim 7,
Wherein the biopolymer-containing solution comprises 100 parts by weight or less of the biopolymer relative to 100 parts by weight of the solvent.
8. The method of claim 7,
Further comprising forming the biopolymer-containing gel bar into a desired shape and size. ≪ RTI ID = 0.0 > 21. < / RTI >
Implanting the biopolymer-containing gel bar according to claim 1 in a soil
Wherein the soil erosion resistance enhancing construction method comprises:
11. The method of claim 10,
Injecting the biopolymer-containing gel bar into the soil can be accomplished by,
Applying the biopolymer-containing gel bar to the surface of the soil;
Stirring the bio-polymer-containing gel bar with the soil; And / or
The method comprising injecting the biopolymer-containing gel bar into the soil using an apparatus.
11. The method of claim 10,
Further comprising injecting the biopolymer-containing gel bar into the soil, followed by heat treatment or chemical treatment.
11. The method of claim 10,
Further comprising injecting the biopolymer-containing gel bar into the soil, followed by spraying with water, an acidic aqueous solution, and / or a cationic aqueous solution.
A soil-biopolymer mixture soil formed by stirring a solution prepared by adding heat to a biopolymer-containing gel bar according to claim 1 by stirring the soil with temperature and / or pH reduction is used for enhancing soil erosion resistance
Wherein the soil erosion resistance enhancing construction method comprises:
15. The method of claim 14,
Wherein the soil-biopolymer mixture soil comprises 100 parts by weight or less of a biopolymer-containing gel bar with respect to 100 parts by weight of the soil.
15. The method of claim 14,
Wherein the soil-biopolymer mixture soil is applied as a method of application to the soil and / or agitation with the soil.

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