KR20190130540A - 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 a biopolymer-containing gel bar, to a production method of the biopolymer-containing gel bar, and to a soil erosion resistance improvement construction method using the biopolymer-containing gel bar, as an environmentally friendly treatment method to improve the resistance to soil erosion.

Description

BIOPOLYMER-CONTAINING GEL BAR, PRODUCING METHOD OF THE SAME, AND CONSTRUCTION METHOD FOR SOIL EROSION RESISTANCE IMPROVEMENT USING THE SAME}

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

Geotechnical composition of soil, strictly speaking particle size distribution, water content and organic content, have a direct impact on soil erosion. Soil erosion is an important environmental issue today because soil erosion has direct and indirect impacts on desertification and climate change. Currently, desertification by soil erosion is taking place on one third of the world's land and is expanding its area, generating 12 million ha of new deserts each year. Soil erosion not only disrupts ecosystems, but also reduces the productivity of cropland, so it is urgent to develop technologies that can reduce or suppress them.

Conventional soil erosion suppression method is mainly proposed to block the external factors (water or wind) causing erosion by installing a mesh (mesh or net) on the soil surface. However, these external installation structures are limited in their performance and costly. Therefore, in recent years, techniques for improving soil resistance to erosion have been proposed [US Pat. No. 4,662,673; U.S. Patent No. 5860770; US Patent No. 7407993]. However, these techniques are different from environmentally friendly ones because they rely on the method of injecting or spraying chemical products. Soil erosion is primarily characterized by the adverse effects of surface destruction and poor development (fire or grazing). Therefore, in order to effectively suppress soil erosion, the ecological environment of the soil should be restored.

The present application relates to a biopolymer-containing gel bar for preventing soil erosion, a method for preparing the biopolymer-containing gel bar, and a method for improving erosion resistance of soil using the biopolymer-containing gel bar.

However, the problem to be solved by the present application is not limited to the problem described above, another problem that is not described will be clearly understood by those skilled in the art from the following description.

A first aspect of the present disclosure provides a biopolymer-containing gel bar for preventing soil erosion, which contains a biopolymer.

A second aspect of the present disclosure provides a biopolymer-containing solution by mixing a biopolymer and a solvent and then heating or dissolving the biopolymer in a solvent at 80 ° C. or higher; And cooling the biopolymer-containing solution to obtain a biopolymer-containing gel bar, wherein the method provides a method for preparing a biopolymer-containing gel bar for preventing soil erosion.

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

The fourth aspect of the present application, the soil-biopolymer mixed soil formed by stirring the solution liquid liquefied by applying heat to the biopolymer-containing gel bar according to the first aspect of the present application after curing with temperature and / or pH decrease It provides a method for improving the erosion resistance of the soil, including using to improve the erosion resistance of the soil.

In one embodiment of the present application, it is possible to provide an environmentally friendly building material or member for preventing soil erosion using a biopolymer, without resorting to a method of blocking erosion factors or a chemical-based chemical injection method using a conventional mesh (mesh or net). have.

Biopolymer is an environmentally friendly material that can be applied to many fields, but it is difficult to realize an optimal state according to the environment of the environment to be applied or the skill of the operator. However, anyone can easily work by applying the building material or member for preventing soil erosion provided herein, in particular, a gel bar type material having a standard mixing ratio. This is because the high concentration of the gel bar is liquefied when the temperature is high, so it is easy to mix with water in the field to make an aqueous solution of the desired concentration. There is a measurable advantage.

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

In one embodiment of the present application, the method for improving the erosion resistance of soil using the biopolymer is in the field of soil preservation, large construction site, the embankment of river and waterside space, stabilization of road and railway fill layer, large-scale farmland composition, desertification prevention It can be effectively used in various fields such as.

1 is a diagram showing a model of a biopolymer-containing gel bar according to one embodiment of the present application.
Figure 2 is a schematic diagram showing a method for producing a biopolymer-containing gel bar according to an embodiment of the present application.
Figure 3 is a schematic diagram showing the spraying of the surface of the soil with a biopolymer-containing gel bar according to an embodiment of the present application.
Figure 4 is a schematic diagram showing the injection into the soil using a biopolymer-containing gel bar according to an embodiment of the present application.
5 is a schematic diagram showing a method for preparing a soil-biopolymer mixed soil according to one embodiment of the present application.
6a and 6b is an example of applying the soil-biopolymer mixed soil according to an embodiment of the present application on the slope.
7 is a photograph showing an example in which the soil-biopolymer mixed soil according to an embodiment of the present application is applied as a vegetation mat.
8 shows a biopolymer treatment process through heat treatment according to an embodiment of the present application.
9 is a graph showing a result of measuring the strength of the biopolymer-treated soil (ocher) according to an embodiment of the present application.
10 is a graph showing a result of measuring the strength of the biopolymer-treated soil (sand) according to an embodiment of the present application.
FIG. 11 illustrates a method of rapidly cooling and curing underwater conditions of a biopolymer-treated soil according to an embodiment of the present disclosure.
12 is a graph showing the results of strength measurement under rapid cooling and underwater curing conditions of a biopolymer-treated soil according to one embodiment of the present application.
FIG. 13 illustrates a conceptual diagram of an environmentally friendly soil building material manufacturing method using a thermal gelling biopolymer according to one embodiment of the present application.
Figure 14 shows a conceptual diagram of the ground treatment method using a thermal gelling biopolymer according to an embodiment of the present application.
15 is a photograph showing various types of biopolymer gel bars according to one embodiment of the present application.
16 is a photograph showing various states of the soil-biopolymer mixed soil according to one embodiment of the present application.
17 is a graph of shear strength evaluation results of the soil-biopolymer mixed soil according to one embodiment of the present application.

Hereinafter, embodiments and examples of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present disclosure.

As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like parts throughout the specification.

Throughout this specification, when a portion is said to be "connected" to another portion, it is not only "directly connected" but also "electrically connected" with a "chemical bond" or another element therebetween. It also includes the case.

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

Throughout this specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding the other components unless specifically stated otherwise.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are provided to aid the understanding herein. In order to prevent the unfair use of unscrupulous infringers. In addition, throughout this specification, "step to" or "step of" does not mean "step for."

Throughout this specification, the term "combination (s) thereof" included in the representation of the Markush form means one or more mixtures or combinations selected from the group consisting of the components described in the Markush form representation, It means to include one or more selected from the group consisting of the above components.

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

Throughout this specification, the term “cationic aqueous solution” means an aqueous solution containing a cation, and may include, for example, an aqueous solution containing an alkali metal or alkaline earth metal ion, but may not be limited thereto. The alkali metal comprises a Group 1 metal consisting of Li, Na, K, Rb, and Cs, which may provide monovalent cations, and the alkaline earth metals may provide divalent cations, Be, Mg, Ca , Group 2 metals consisting of Sr, Ba, and Ra.

Hereinafter, embodiments of the present disclosure have been described in detail, but the present disclosure may not be limited thereto.

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

In one embodiment of the present disclosure, the biopolymer-containing gel bar may include about 100 parts by weight or less of the biopolymer, but may not be limited thereto. For example, the biopolymer-containing gel bar may contain about 0.1 parts by weight to about 100 parts by weight, about 10 parts by weight to about 100 parts by weight, and about 20 parts by weight to about 100 parts by weight of the solvent. 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, about 20 It may include, but not limited to, about 10 parts by weight or less, about 5 parts by weight or less, or about 1 part by weight or less. As described above, a biopolymer-containing gel bar having various concentrations may be prepared, but when the ratio of the biopolymer is too low, for example, less than about 0.1 part by weight, the gel may not be formed properly due to the low concentration. Conversely, if the concentration is too high, for example, greater than about 100 parts by weight, the viscosity may be large and hard and gel molding and field application may be difficult.

In one embodiment of the present application, the solvent may include water or an alkaline solvent having a pH of about 7 or more, but may not be limited thereto.

In one embodiment of the present application, the biopolymer may be used without limitation as long as the biopolymer is produced from an organism, but may not be limited thereto. The biopolymer may include a substance having glucose as a basic unit, and may be broadly classified into a polysaccharide and an amino acid series, and the polysaccharide biopolymer may be The shape can be classified into high-molecular chains and gelation biopolymers. For example, the polymer chain-type biopolymer may include beta-1,3 / 1,6-glucan (PolycanTM), alpha glucan, curdlan, or the like, and the gelling biopolymer may include welan gum. (wellan gum), gellan gum (gellan gum), xanthan gum, agar gum (agar gum), or succinoglycan gum (succinoglycan gum) and the like, but may not be limited thereto. For example, the amino acid-based biopolymer may include chitosan, gamma fiji, or the like, but may not be limited thereto. In addition, for example, the biopolymer may include, but is not limited to, casein and / or polylysine.

Biopolymers are high-molecular substances produced by living organisms, and they refer to various kinds of high-molecular substances in which carbohydrates, fats, proteins, nucleic acids, and complexes thereof are synthesized in the organism and secreted out of the body. In particular, water-soluble or insoluble polysaccharides are representative biopolymers that are useful in humans, with 10 or more monosaccharides or derived monosaccharides being the most abundant in nature as a polymer produced by glycoside linkages. Unlike chemical synthetic polymers, they are environmentally friendly, and due to their functional properties such as gel formation, emulsion stability, surface tension control, water absorption, adhesion, lubrication, and biofilm formation, which are derived from structural properties, It is used as the main material in the industrial field.

In one embodiment of the present application, the biopolymer may be low viscosity at high temperatures, and may increase in viscosity as it is cooled, but may not be limited thereto. For example, the high temperature may be about 80 ° C. or more, but may not be limited thereto. For example, the biopolymer may be dissolved at a temperature below about 80 ° C., but the dissolution time is long.

In one embodiment of the present application, the biopolymer may exhibit a low viscosity at a pH of about 7 or more, and may increase in viscosity as the pH value is lower than about 7, but may not be limited thereto.

In one embodiment of the present application, the biopolymer may be to form a gel (gel) upon cooling after heat treatment, but may not be limited thereto. Since the gel is formed by the increase in viscosity during cooling after heat treatment, the structure of the biopolymer-containing gel bar may be maintained without being disturbed.

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

The biopolymer is water soluble and is affected by temperature, water content, and pH. In addition, it is easy to manufacture a bar (bar) because the thermal gelation phenomenon appears. The higher the temperature of the aqueous biopolymer solution, 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. The lower the water content, the higher the elasticity of the gel bar. The thermally polymerized biopolymer does not end once it has been formed, but when it is applied again, it becomes less viscous and re-forms with the soil, and it is conditionally reversible because it is solidified upon cooling. There is an advantage.

In one embodiment of the present application, the biopolymer-containing gel bar is to have a moldability, specifically, the molding is easy to be molded according to the desired size and shape, can be manufactured according to the site conditions and the desired space It is also easy to store.

In one embodiment of the present application, the biopolymer-containing gel bar may be to have a variety of standardized concentration, but may not be limited thereto.

In one embodiment of the present application, the mixing ratio with the material to be applied when the biopolymer is applied in the field is important, the biopolymer-containing gel bar according to the present application, because it is in the form of a gel bar, easy loading by weight It is possible.

In addition, a lot of time and effort is required to produce a highly concentrated biopolymer-containing solution at the construction site, but the use of the pre-fabricated biopolymer-containing gel bar not only significantly reduces this effort but also makes it easy for anyone in the field. Appropriate amount can be used.

In one embodiment of the present application, the biopolymer-containing gel bar can be utilized in the field of construction using the properties as described above. In particular, biopolymers can be mixed with soils to achieve higher strength and durability than soil-based soil construction (walls or columns, etc.), and biodegradation of organic materials in comparison with traditional methods such as straw. The problem of deterioration due to (degradation) can be overcome, and there is an advantage in that construction can be highly environmentally friendly compared to the method using chemical additives (gypsum, cement, etc.). The soil building material and member may include, for example, a wall, a floor, a brick, a block, a board, or a panel, but may not be limited thereto. The member means a construction subsidiary material.

A model of a biopolymer-containing gel bar according to one embodiment of the present disclosure is shown in FIG. 1.

A second aspect of the present disclosure provides a biopolymer-containing solution by mixing a biopolymer and a solvent and then heating or dissolving the biopolymer in a solvent of at least about 80 ° C .; And cooling the biopolymer-containing solution to obtain a biopolymer-containing gel bar, wherein the method provides a method for preparing a biopolymer-containing gel bar for preventing soil erosion. With respect to the biopolymer-containing gel bar according to this aspect, all of the content described for the first aspect of the present application can be applied.

In one embodiment of the present application, the biopolymer-containing solution may include about 100 parts by weight or less of the biopolymer based on about 100 parts by weight of the solvent, but may not be limited thereto. For example, the biopolymer-containing solution may contain about 0.1 parts by weight to about 100 parts by weight, about 10 parts by weight to about 100 parts by weight, and about 20 parts by weight to about 100 parts by weight of about 100 parts by weight of the solvent. 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, about 20 parts by weight Or less, about 10 parts by weight or less, about 5 parts by weight or less, or about 1 part by weight or less, but may not be limited thereto.

In one embodiment of the present application, the solvent may include water or an alkaline solvent having a pH of about 7 or more, but may not be limited thereto.

In one embodiment of the present application, the biopolymer-containing gel bar may further include molding to a desired shape and size, but may not be limited thereto.

In one embodiment of the present application, the biopolymer is easy to dissolve in a high temperature solvent of about 80 ℃ or more. Equipped with high temperature conditions and heating at high water content, the solubility of the biopolymer is increased, and the concentration of the biopolymer is increased while partially evaporating the moisture. Once the desired concentration is reached, further heat transfer is blocked and cooled until the biopolymer-containing solution is thermally gelled. Thermal gelling by cooling the biopolymer-containing solution may be to be stored in the desired size and shape, but not limited thereto.

In one embodiment of the present application, upon cooling the biopolymer-containing solution to obtain a biopolymer-containing gel bar, the pH of the biopolymer-containing solution is adjusted to less than about 7 It may be to promote gelation, but may not be limited thereto. For example, the decrease in pH value may be performed by adding an acidic aqueous solution having a pH of about 5 or less, but may not be limited thereto.

The schematic diagram of the manufacturing method of the biopolymer containing gel bar which concerns on this aspect is shown in FIG.

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

With respect to the biopolymer-containing gel bar according to this aspect, all of the descriptions for the first and second aspects herein can be applied.

Soil erosion is affected by soil moisture, particle size distribution, organic matter content, and surface vegetation. In the case of deserts with severe soil loss, all of these conditions are poor. To improve the resistance to soil erosion, it is necessary to improve the properties of the soil itself rather than blocking external factors. To this end, an environmentally friendly method is required to maintain the soil moisture for a long time, increase the cohesion (adhesion) between the soil particles, and to grow vegetation smoothly in the future. Conventional chemical treatment methods focus only on primary soil strength enhancement, and there is a lack of consideration of a vegetation environment for suppressing permanent erosion.

In one embodiment of the present disclosure, injecting the biopolymer-containing gel bar into the soil comprises spraying the biopolymer-containing gel bar onto the surface of the soil; Stirring the biopolymer-containing gel bar with the soil; And / or injecting the biopolymer-containing gel bar into the soil using a device, but may not be limited thereto.

In one embodiment of the present application, after the biopolymer-containing gel bar is sprayed on the surface of the soil, the biopolymer-containing gel bar penetrates into the soil, and a schematic diagram thereof is shown in FIG. 3.

In one embodiment of the present application, the soil may be selected from the group consisting of fine (clay), granulated (sand), and combinations thereof, but may not be limited thereto.

In one embodiment of the present application, after injecting the biopolymer-containing gel bar into the soil, may further include performing heat treatment or chemical treatment, but may not be limited thereto. The heat treatment method may include, but is not limited to, a method of directly applying heat, heating by radiant heat using a heating plate, or generating heat by activating water molecules using microwaves.

In one embodiment of the present application, after injecting the biopolymer-containing gel bar into the soil, may further include watering, acidic aqueous solution, and / or cationic aqueous solution, but may not be limited thereto. For example, an acidic aqueous solution having a pH of about 5 or less may be sprayed to further strengthen the structure of the biopolymer-containing gel bar mixed with the soil, but may not be limited thereto. For example, by spraying warm water above room temperature, the gel bar may be dissolved well, but may not be limited thereto.

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

In one embodiment of the present application, the construction method for enhancing the erosion resistance of the soil may include, but not limited to, spraying the solution liquefied in the soil by applying heat to the biopolymer-containing gel bar.

In one embodiment of the present application, after the biopolymer-containing gel bar is injected into the soil, it may further include adding a cation of an alkali metal or alkaline earth metal, but may not be limited thereto. For example, a cation of an alkali metal such as Na +, K + or an alkaline earth metal such as Ca 2 +, Mg 2 + may be added to induce further gelation of the biopolymer, thereby forming a more robust soil, but may not be limited thereto.

In one embodiment of the present application, after injecting the biopolymer-containing gel bar into the soil, may further include adding an acidic or cationic aqueous solution of pH about 5 or less, but is not limited thereto. Can be. 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 biopolymer according to the present invention has a negative charge on the surface, the addition of a cation of an alkali metal or an alkaline earth metal after the addition to the soil may further improve the bonding property with the soil.

In one embodiment of the present application, after adding the biopolymer-containing gel bar to the soil, it may further include heating and cooling the soil, but may not be limited thereto.

The fourth aspect of the present application, the soil-biopolymer mixed soil formed by stirring the solution liquid liquefied by applying heat to the biopolymer-containing gel bar according to the first aspect of the present application after curing with temperature and / or pH decrease It provides a method for improving the erosion resistance of the soil, including using to improve the erosion resistance of the soil.

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

In one embodiment of the present application, the soil-biopolymer mixed soil may include about 100 parts by weight or less of the biopolymer-containing gel bar based on about 100 parts by weight of the soil, but may not be limited thereto. For example, the soil-biopolymer mixed soil may include about 1 part by weight to about 100 parts by weight, about 20 parts by weight to about 100 parts by weight, and about 40 parts by weight of the biopolymer-containing gel bar based on about 100 parts by weight of the soil. To about 100 parts by weight, about 60 parts by weight to about 100 parts by weight, about 80 parts by weight to about 100 parts by weight, about 10 parts to about 80 parts by weight, or about 40 parts to about 80 parts by weight It may be, but may not be limited thereto.

In one embodiment of the present application, it may be to add water at the time of heating, but may not be limited thereto.

In one embodiment of the present application, the construction method for enhancing the erosion resistance of the soil, the bio-polymer-containing gel bar, soil, and the soil-biopolymer formed by curing according to the temperature decrease (cooling) after heating and mixing water It may be to include using a mixed soil, but may not be limited thereto.

In one embodiment of the present application, the method for improving the erosion resistance of the soil is formed by heating and mixing the biopolymer-containing gel bar, soil, and water and curing according to a decrease in pH value (less than pH about 7). It may be to include using a soil-biopolymer mixed soil, but may not be limited thereto. 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 may not be limited thereto. The soil-biopolymer mixed soil according to the present disclosure may be soil, water, and biopolymer. Is mixed as an appropriate temperature and water content, and the biopolymer serves to help stabilize the soil due to excellent binding force.

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

In one embodiment of the present application, the cooling may be to include natural cooling or rapid cooling, but may not be limited thereto.

In one embodiment of the present application, by hardening the mixture of the soil, water and biopolymer in a mold may be to include the production of the soil-biopolymer mixed soil having a desired shape and size, but may not be limited thereto. have. For example, the mixed soil may be manufactured in various shapes such as brick shape, columnar shape, or panel shape.

In one embodiment of the present application, the soil-biopolymer mixed soil may be to be constructed as a method of stirring and / or applying to the soil, but may not be limited thereto.

In one embodiment of the present application, the stirring with the soil may be to agitate with the soil after applying heat to the soil-biopolymer mixed soil, but may not be limited thereto.

The soil-biopolymer mixed soil according to the present invention exhibits superior stability than conventional soil by having a good binding force between the biopolymer and the soil. In addition, if the soil-biopolymer mixture soil is used, it can be immediately applied to the application site in the field, and it is economical to shorten the air, and it can be easily operated by anyone, and it is manufactured with eco-friendly materials so that no industrial waste remains after construction. There is an advantage.

In one embodiment of the present application, when using the mixed soil for the construction to increase the erosion resistance of the soil, may be to perform an additional heat treatment to the mixed soil, but may not be limited thereto. In addition, the use of the mixed soil may be different depending on the presence or absence of additional heat treatment, but may not be limited thereto. For example, the mixed soil without further heat treatment may be used as fill material or fill material, and the mixed soil produced by further heat treatment may be used as brick, block, or soil pavement material. The heat treatment method may include, but is not limited to, a method of directly applying heat, heating by radiant heat using a heating plate, or generating heat by activating water molecules using microwaves.

In one embodiment of the present application, the coating may be used to apply or plaster at a desired place after applying heat to the soil-biopolymer mixed soil, but may not be limited thereto. When applying heat to the mixed soil during the application may be to increase the adhesion, but may not be limited thereto.

An example of applying the soil-biopolymer mixed soil according to the present invention to the slopes is shown in FIGS. 6A and 6B.

In one embodiment of the present application, the soil-biopolymer mixed soil may be constructed as an environmentally friendly flooring agent, but may not be limited thereto.

In one embodiment of the present application, it is possible to produce a vegetation mat by growing grass in the soil-biopolymer mixed soil, but may not be limited thereto. The soil-biopolymer mixed soil according to the present application is shown in Figure 7 applied as a roll grass.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the following Examples are only provided to help understanding of the present application, and the contents of the present application are not limited to the following Examples.

[ Example ]

Various indoor experiments were conducted to verify the soil erosion inhibitory effects of biopolymers. In this embodiment, agar gum (Samchun Pure Chemical, CAS 9002-18-0) and gellan gum (Sigma-Aldrich, CAS 71010-52-) in a pure powder state as thermal gelation biopolymers. 1) was used.

Example  One: Biopolymer Preparation of Gel Bars Containing

40 parts by weight (based on the total weight of the aqueous solution) of gellan gum, a biopolymer, was mixed with distilled water at a high temperature (above 80 ° C.) to obtain a highly viscous biopolymer-containing aqueous solution, where gellan gum had the maximum solubility. 50%]. The obtained biopolymer-containing aqueous solution was cooled to obtain a biopolymer-containing gel bar. The biopolymer-containing gel bar according to the present embodiment has the advantages of easy weight control and molding, safe and easy manufacturing process, and manufacturing with a constant composition. In this regard, FIG. 15 shows a biopolymer-containing gel bar prepared according to this example: (a) biopolymer-containing gel bar, (b) free-form biopolymer-containing gel bar, (c) grinding Easy biopolymer-containing gel bars, (d) before mixing with soil and (e) after mixing with soil.

Example  2: using heat treatment Biopolymer Mix of gel bars and soil

Regardless of the type of soil, the biopolymer aqueous solution and the soil prepared by dissolving the biopolymer-containing gel bar at high temperature were mixed to thermally gel the biopolymer-containing gel bar and the soil. The biopolymer-containing gel bars were dissolved in a solvent (water) at high temperature (80 ° C.), and then mixed with the heated soil to prevent premature gelation due to rapid temperature drop during mixing. An important point in forming a high temperature biopolymer-containing aqueous solution is that the concentration of the biopolymer (solvent-to-solvent) must be properly adjusted. Typically, agar gum absorbs water equivalent to 20 times its mass due to hydrophilicity at room temperature, and its solubility increases with increasing temperature.

The high temperature biopolymer-containing aqueous solution was uniformly mixed with the high temperature soil, and mixed with soil such as loess (viscosity soil type) up to 60% (solution weight to soil weight) or less than 30% with sandy soil. After mixing, it may be molded to a desired purpose and then cooled in air or in water. The summary of this process is as shown in FIG.

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

Various soil-biopolymer mixture soils were prepared by using loess and sand at room condition and the strength was measured. For each soil, agar gum and gellan gum were mixed at 1% and 3% of the soil weight, respectively, and the initial water / soil mixture ratio was 60% for ocher and 30% water / soil mixture ratio for sand. . The strength of the specimen subjected to natural cooling and air curing in the air after mixing is as shown in FIGS. 9 (ocher) and 10 (sand). According to the results of FIGS. 9 and 10, the compressive strength of the soil was significantly increased by mixing the biopolymer. In particular, in the case of ocher it was confirmed that the maximum strength reaches 12 MPa to form a very hard soil composition. This shows that both agagum and gellan gum are negatively charged, forming tighter bonds with ocher particles that carry surface charges.

However, in the case of the ocher specimens subjected to natural cooling and air curing in the air, up to 20% of the dry shrinkage (volumetric strain) behavior was found to solve this problem. The specimen was cooled in cold water by rapid cooling of the specimen (3% agar gum and 3% gellan gum) immediately after compounding and molding as in the procedure of FIG. 8 (FIG. 11). As a result of air curing the specimen after sufficient cooling, it was confirmed that the final dry shrinkage was reduced to 10% or less. Therefore, it was confirmed that the initial gelation of the soil-biopolymer mixed soil is very important in order to prevent dry shrinkage, various methods such as cold water, refrigerant, cold, or refrigeration can be applied.

Finally, in order to confirm the behavior of rapid cooling and underwater curing conditions, the specimens were immediately submerged in water and subjected to long-term underwater curing. Long-term immersion and saturated soils have almost no compressive strength, while soil-biopolymer mixed soils exhibit compressive strengths of 50 kPa to 200 kPa even under 28-day immersion conditions. It could be confirmed that (Fig. 12). Of particular note is that the volume change of soil-biopolymer mixture soils is close to 0% for rapid cooling and aquatic curing. As a result, it was confirmed that the biopolymer can be used as a very stable ground injection and treatment agent because there is no volume change when the biopolymer is applied to water and submerged state.

Example  4: durability test for water

In order to examine the water resistance of the thermal gelled soil-biopolymer mixture soils, re-immersion and strength measurements were performed for the most sensitive conditions, natural cooling and air curing specimens. Two months after curing, the specimens were immersed in water for one week. At 7 days after immersion, the compressive strength and volume expansion rate were evaluated.

The final strength of the dried agar gum was 12 MPa in the 3% treated agar gum, which was reduced to 600 kPa after immersion, and the dry strength of the gellan gum 3% was reduced to 500 kPa after the immersion at 10 MPa. The results were shown. It is important to note that in all cases, the specimens retained their original shape, with slight volume expansion due to water absorption (see Table 1 below).

TABLE 1

In this regard, Figure 13 shows a conceptual diagram of a method for manufacturing environmentally friendly soil building material using a thermal gelling biopolymer according to an embodiment of the present application. In the method shown in FIG. 13, when the soil building material (wall, panel, brick, etc.) is manufactured using the thermal gelling biopolymer, high strength and high durability building material can be realized. Thermal gelling biopolymers are characterized by low viscosity at temperatures above 80 ° C and formation of highly viscous gel-matrics when cooled below 40 ° C, prior to soil mixing and kneading. It is important not to lose the high temperature until the stage. Thus, the soil and the biopolymer-containing solution are each heat-treated to prepare a mixture at a specific temperature (for example 80 ° C.) or higher, and the mixture is poured into a mold and then cooled. Various shapes can be implemented according to the mold or mold. After being poured into the mold, it is hardened by cooling to 40 ° C. or lower. In this case, it is hardened by natural cooling in air or by metal cooling using water or other refrigerant. In the case of the thermal gelled biopolymer according to the present embodiment, the water permeability is very low, so it was confirmed that the soil structure is not disturbed even when soaked in water initially. I can make it.

Overall, the soil-biopolymer mixed soil according to the present application was found to have excellent durability against water. Therefore, the high temperature biopolymer solution can be applied in the form of directly injecting or stirring the ground for the purpose of ordering and shielding the ground or for other reinforcement reasons. The specific implementation method is the same as FIG.

Example  5: Biopolymer Soil with Gel Bars Biopolymer Mixed soil  Produce

This embodiment uses the fact that the specific heat of the soil is lower than the water quickly becomes high temperature and the point that can be easily worked using a pigtail hot water heater and a cement mixer that can be easily used in the field. Since the biopolymer-containing gel bar was high in concentration, the concentration of the aqueous solution was reduced by using water, and the amount of water was determined and then poured into the container together with the soil to be mixed. The pigtail hot water heater was used to heat the water and the soil to the highest possible temperature, and then put the biopolymer-containing gel bar into the full bucket. Then heated a little more with pigtail hot water heater and mixed using a cement mixer. Be careful not to touch the biopolymer-containing gel bar directly when it comes in direct contact with the pigtail hot water heater. In addition, since water may evaporate during the heating or mixing process, the amount of water was calculated by considering it.

Example  6: Biopolymer Soil using gel bar solution Biopolymer Mixed soil  Produce

Water has a high specific heat in the rain, so once boiled, it does not cool easily. Therefore, a biopolymer-containing gel bar is added to hot water to prepare an aqueous solution, and then mixed with soil using the prepared aqueous solution. An advantage of this method is that the biopolymer-containing aqueous solution and the soil can be mixed more homogeneously.

Example  7: dirt Biopolymer  Preparation and Strength Evaluation of Mixed Soils

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

Example  8: dirt Biopolymer Mixed soil  Used Vegetation  Mat manufacturer

Usually, vegetation mats or field-pouring vegetation rolls are mostly composed of soil or culture soil and vegetation, auxiliary fibers or adhesives. This example proposes a vegetation mat manufacturing technique using a biopolymer-containing gel bar instead of the use of artificial / chemical adhesives / binders.

As mentioned above, the biopolymer-containing gel bar can be used directly, or the biopolymer-containing gel bar can be diluted and mixed with the soil in solution, or the seeds can be mixed together or molded into a panel or mat, and then Sowing seedlings is a technique to create vegetation on biopolymer-soil mixture soil. The vegetation mat of this embodiment may be used in the form of a panel or mat having a horizontal length and a vertical length of 10 cm to 100 cm, or in a continuous roll form. A photograph of a specific embodiment thereof is shown in FIG. 7.

This method is intended to improve the weakness of the slope stabilization method using the existing vegetation on slopes or slopes. When grass is grown in soil containing biopolymer-containing gel bars instead of ordinary soil in cultivation of plain grass and roll grass, the root of the plant catches the soil, so that the soil and plants blended with the biopolymer naturally settle during construction. have.

The above description of the present application is for the purpose of illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the claims below 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 (8)

A method of enhancing erosion resistance of soil, comprising injecting a biopolymer-containing gel bar into the soil,
The biopolymer-containing gel bar contains 20 parts by weight or less of the biopolymer based on 100 parts by weight of a solvent,
The biopolymer has a thermal property that the viscosity is lowered above 80 ℃ and the viscosity increases below 80 ℃,
The thermal properties are used in the manufacture of the biopolymer-containing gel bar and in applying the biopolymer-containing gel bar to soil,
The gel bar is moldable,
The gel bar is easy to control the weight, can be manufactured in a constant composition,
Applying the biopolymer-containing gel bar to the soil,
Spraying the biopolymer-containing gel bar on the surface of the soil;
Stirring the biopolymer-containing gel bar with the soil;
Injecting the biopolymer-containing gel bar into the soil using a device; or
Spraying the solution liquid by applying heat to the biopolymer-containing gel bar in the soil,
The biopolymer-containing gel bar is applied to the soil and then heat treated or chemically treated,
The heat treatment includes applying heat directly to the soil, heating with radiant heat using a heating plate, or activating the biopolymer-containing gel bar or water molecules in the soil using microwaves to generate heat. To do it,
The adjustment of the application amount of the biopolymer-containing gel bar is made by the input according to the weight of the biopolymer-containing gel bar relative to the weight of the soil,
Applicable to soil conservation, large construction sites, embankment of river and waterfront spaces, stabilization of road and rail fillets, farmland formation or desertification prevention,
Method of improving soil erosion resistance.
The method of claim 1,
The biopolymer is beta-1,3 / 1,6-glucan, alpha glucan, curdlan, wellan gum, gellan gum, xanthan gum, agar gum. gums, succinoglycan gums, chitosan, gamma fiji, γPGA, casein, polylysine, and combinations thereof Construction method to increase the erosion resistance of phosphorus and soil.
The method of claim 1,
The biopolymer has a low viscosity in a state of pH 7 or more, the viscosity increases as the pH value is lower than 7, how to increase the erosion resistance of the soil construction.
The method of claim 1,
The biopolymer-containing gel bar,
Mixing the biopolymer and the solvent and then heating or dissolving the biopolymer in a solvent at 80 ° C. or higher to obtain a biopolymer-containing solution;
Cooling the biopolymer-containing solution to obtain a biopolymer-containing gel bar, and
Shaping the biopolymer-containing gel bars into the desired shape and size
Comprising a, it is prepared through the production method of the soil erosion prevention biopolymer-containing gel bar, erosion resistance enhancement construction method of the soil.
The method of claim 1,
And injecting the biopolymer-containing gel bar into the soil and then spraying water, an acidic aqueous solution, and / or a cationic aqueous solution.
A method of enhancing erosion resistance of soil, comprising injecting a biopolymer-containing gel bar into the soil,
The biopolymer-containing gel bar contains 20 parts by weight or less of the biopolymer based on 100 parts by weight of a solvent,
The biopolymer has a thermal property that the viscosity is lowered above 80 ℃ and the viscosity increases below 80 ℃,
The thermal properties are used in the manufacture of the biopolymer-containing gel bar and in applying the biopolymer-containing gel bar to soil,
The gel bar is moldable,
The gel bar is easy to control the weight, can be manufactured in a constant composition,
Applying the biopolymer-containing gel bar to the soil is a soil-biopolymer mixed soil formed by agitation of the liquid solution by applying heat to the biopolymer-containing gel bar with soil and curing according to a decrease in temperature and / or pH. To increase the erosion resistance of
The biopolymer-containing gel bar is applied to the soil and then heat treated or chemically treated,
The heat treatment includes applying heat directly to the soil, heating with radiant heat using a heating plate, or activating the biopolymer-containing gel bar or water molecules in the soil using microwaves to generate heat. To do it,
The adjustment of the application amount of the biopolymer-containing gel bar is made by the input according to the weight of the biopolymer-containing gel bar relative to the weight of the soil,
Applicable to soil conservation, large construction sites, embankment of river and waterfront spaces, stabilization of road and rail fillets, farmland formation or desertification prevention,
Method of improving soil erosion resistance.
The method of claim 6,
Wherein the soil-biopolymer mixed soil is less than 100 parts by weight of the biopolymer-containing gel bar that will contain less than 100 parts by weight, construction method to increase the erosion resistance of the soil.
The method of claim 6,
The soil-biopolymer mixed soil is to be constructed as a method of stirring and / or applying to the soil, the soil erosion resistance enhancement construction method.

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