KR20150111029A - Soil improved with hair fiber and soil improvement method to utilize the soil improved with hair fiber - Google Patents

Abstract

The present invention relates to a soil improver using a hair fiber, and to a method for improving soil by using the soil improver. To this end, a hair fiber for improving strength is injected into the soil, or stirred with the soil so as to improve the strength of the soil. Hairs of a human or an animal are used in order to increase the strength of the soil, thereby solving problems of increasing construction costs occurring by increases in the amount of a cement-based or lime-based solidifying agent. In addition, as hairs of a human or an animal are reused to improve the strength of the soil instead of discarding the same, costs for burying and treating waste as well as construction costs can be reduced by decreasing the amount of a cement-based or lime-based solidifying agent injected to strengthen the soil. Moreover, the soil can be improved in an environment-friendly manner by using hairs of a human or an animal, which are environment-friendly materials, instead of using chemicals.

Description

Technical Field [0001] The present invention relates to a soil improvement agent using hair fibers and a soil improvement method using the hair fiber,

The present invention relates to a ground improvement agent containing hair fibers and a ground improvement method using the same. More particularly, the present invention relates to a ground improvement agent including hair fibers, The present invention relates to a soil remediation body using hair fibers capable of expressing the strength of the ground at the same magnitude while injecting a smaller amount of the solidifying agent, and a soil improvement method using the same.

Construction work for installing various facilities (buildings, railways, roads, harbor facilities, breakwater, etc.) on or below the ground is being carried out in both domestic and overseas locations. In order for these various facilities to be installed safely, the ground supporting the facilities should have sufficient bearing capacity to support various loads such as the weight of the facility and any additional loadings such as torsional load and wind load. Otherwise, the ground may be destroyed or excessive settlement may occur, causing various damages such as cracks in the facilities.

Therefore, since the strength of the ground is directly related to the safety of the facilities, it must be checked whether it has sufficient ground strength or not, and if not, a method of increasing the ground strength should be sought.

Especially, clay soils and loose sand soils have weak strength in the ground so that various soil strength improvement methods have been applied.

The existing method of improving the soil strength is divided into clay ground and sand ground, which are briefly described as follows.

As a method of improving the clay soil, a method of replacing soft clay with high quality soil, a density increasing method such as a sand-drain method of increasing soil strength by dehydration and drainage, a method of injecting or mixing liquid or powder- And cementing method to cement the ground. As the improvement method of the sand ground, there are a compaction method such as vibroplating, a sand compaction file, and a high-resolution method in which the soil is consolidated by injecting or mixing a liquid or powder type of solid solution.

Various types of soil strength improvement methods have been selected and used according to site conditions.

In particular, the high-hardness method used for both clay ground and sandy ground is a method for increasing the strength of the ground to the required strength by injecting or mixing solidifying agents such as cementitious materials or lime-based materials into the ground, As the volume increases, the construction cost also increases.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the various drawbacks and problems caused by the above-mentioned conventional soil conditioner and its construction method, and its object is to use human or animal hair to increase the strength of the ground, And the increase in the cost of construction due to the increase of the amount of the solidifying agent such as the finishing agent, the finishing agent, the accounting, etc., And to provide a ground improvement method using the same.

Another object of the present invention is to provide a ground improvement agent using hair fibers and a ground improvement method using the same, which can reduce the expense to enter landfill and disposal by recycling to enhance the strength of the ground without abandoning the hair of a person or an animal I have to.

Another object of the present invention is to provide a ground improvement agent using hair fibers which can improve the soil environment in an environmentally friendly manner by using human or animal hair instead of a chemical agent in order to enhance the strength of the ground, .

In order to accomplish the above object, the present invention provides a ground improvement agent using the hair fiber, wherein the hair fiber for enhancing the strength is injected into the ground or the strength is increased by stirring with the ground.

Also, the method for improving the ground using the hair fiber according to the present invention is characterized in that the hair fiber for enhancing the strength is injected into the ground or the strength is increased by stirring with the ground.

In order to increase the strength of the ground, the present invention uses human or animal hair to reduce problems such as an increase in construction cost caused by an increase in the amount of solidifying agent such as cementitious or lime-based finishing. In addition to reducing construction cost by reducing the amount of solidifying agent such as cement and lime to be added for the purpose of enhancing the strength of the ground, it is possible to reduce expenses for landfilling and disposal of waste, There is a special advantage that it is possible to improve the environment in an environmentally friendly manner by using an eco-friendly material such as human hair or animal hair.

Figure 1 is a photograph showing the materials used for the manufacture of one specimen,
FIG. 2 is a photograph showing a material stirring process and a specimen manufacturing process according to the present invention,
3 is a photograph showing a compressive strength test of a specimen according to the present invention,
FIG. 4 is a graph showing changes in compressive strength according to the curing period of the present invention including the hair fiber and the conventional specimen not including the hair fiber,
5 is a stress-strain relationship graph of the present invention including hair fibers and a conventional specimen not including hair fibers,
6 is a photograph showing a fracture surface of a specimen after fracture according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the ground improvement implement using the hair fiber of the present invention and the ground improvement method using the same will be described in detail with reference to the accompanying drawings.

Fig. 1 is a photograph showing materials used for manufacturing one specimen, Fig. 2 is a photograph showing a material stirring and specimen manufacturing process according to the present invention, Fig. 3 is a photograph showing a compressive strength test of the specimen according to the present invention, 4 is a graph showing the change in compressive strength according to the present invention including hair fibers and the curing period of a conventional specimen not including the hair fibers, and FIG. 5 is a graph showing a change in compressive strength of the conventional specimen, FIG. 6 is a photograph showing a fracture surface of a specimen after fracture according to the present invention. In the ground remover using the hair fiber of the present invention, It has improved strength.

Meanwhile, the ground improvement method using the hair fiber of the present invention is a ground improvement method in which hair fibers for enhancing the strength are injected into the ground or the strength is increased by stirring with the ground.

The hair fiber may be a hair fiber of a person or an animal, and the cement-based solidifying agent or the lime-setting solidifying agent may be further added to the soil-improving agent.

The soil conditioner may further include at least one of fly ash, blast furnace slag, and silica fume as an admixture, and the soil conditioner may contain an AE agent, a water reducing agent, a quick-setting agent, a fluidizing agent, a high-performance AE water reducing agent, , And a coagulation retarding agent may be further included.

Unlike the conventional method in which only a solidifying agent such as cement or lime is injected into or mixed with a ground, the present invention is a method of mixing a hair fiber of a person or an animal with a solidifying agent, It is injected into the ground or agitated with the ground.

Of course, the mixing time of the hair fibers can be adjusted by adding the solidifying agent such as the soil and cement first according to the site and the construction conditions, and then mixing them afterwards. Alternatively, after mixing the soil and hair fibers first, It may be mixed.

When mixing materials, water is needed, where the water can be divided into the water that the soil contains and the water used for further mixing and injection. In other words, it is to form a ground remediation system in which the soil, the stiffening agent, the hair fiber and the water are mixed together, and over time, the solidifying agent mixed with the hair fibers causes the hydration reaction, To increase the strength of the ground by combining with hair fibers.

In addition to the solidifying agents such as cement and alumina based on the field conditions and the construction conditions, the hair-improving agent using the hair fibers can be used in a wide range of applications including admixtures such as fly ash, blast furnace slag or silica fume, AE agents, water reducing agents, , A hardener, and a hardening agent such as a hardening retarder may be further used.

In addition, the length of the hair fibers used can be varied depending on the field conditions and the construction conditions. A single hair fiber of a person can support a load of about 100 grams, and a load of about 50 kilograms can be supported by a circle of about 1 mm square, combining several hair fibers (quoted from Perelman's Living Physics).

In addition, the hair fibers of people and animals grows continuously, and most people regularly make haircuts at hairdressers or hairdressers. Hairfibers haircuts at hairdressers and hairdressers are stored in garbage bags It will be transported and processed. The present invention is to be used for enhancing the soil strength by recycling such hair fibers, and the expected effect is considered to be significant.

Example

The specimens of the hair fiber non-mixed soil modification agent and the hair fiber mixed soil modification agent were prepared by the method of the present invention.

First, as shown in Fig. 1, clay, cement, hair fibers and water were prepared as materials. That is, kaolinite clay which passed through the 200th clay using clay tester and clay Portland cement as cement was prepared.

The physical properties of the materials prepared herein are shown in Table 1 below.

Physical properties of materials        division  Unit weight (t / m3)   Liquid Limit (%)   Firing Limit (%)      importance  Kaolinite clay      2.3      50      26      2.5 Usually Portland Cement      1.5      -      -      3.05      Hair Textile  1.1 to 1.6      -      -   1.1 to 1.6         water      1.0      -      -      1.0

Then, as shown in FIG. 2, water equivalent to the liquid limit was added to the kaolinite clay and stirred with a Hobart type mixer for 10 minutes (FIG. 2 a), and a mixture of water and cement was added to the agitated clay (5 mm length) and cement were added to the above-mentioned agitated clay (at the time of producing the specimen of the hair fiber mixed soil conditioner, c and d) with a Hobart mixer for 10 minutes to form the final mixture.

The composition of the final mixture was as shown in Table 2 below.

The weight and weight ratio of the material to one specimen                       division Hair fiber unmixed
Specification Hair fiber blend
Specification                  Weight of clay (Ws)      600g      600g                 Weight of cement (Wc)       48g       48g                Weight of hair fiber (Wh)        0g        0.48 g                 Total weight of water (Ww)      338.4 g      338.4 g        Hair fiber - cement weight ratio (Wh / Wc x 100%)        0%        1.0%  Water-cement weight ratio (Ww / Wc x 100%) used in cement mixing       80%       80%          Cement-clay weight ratio (Wc / Ws x 100%)        8%        8%

Subsequently, the final mixture was divided into three layers with a diameter of 50 mm and a height of 100 mm to fill the cavity with a 10 mm-diameter compaction rod 25 times per layer (e in FIG. 2) In order to prevent moisture evaporation after sealing with vinyl, it was put into a thermo-hygrostat to maintain sufficient humidity, and was cured at a temperature of 20 ° C and a humidity of 95%.

Finally, at the predetermined ages (3 days, 7 days, 14 days, 28 days), the specimen mold was taken out from the thermo-hygrostat and the upper surface was capped with gypsum to form the ash horizontally and then demolded in the specimen mold.

The uniaxial compressive strength of the manufactured soil conditioner specimen was measured as shown in Fig. 3, and the results are shown in Fig. 4 and Fig.

FIG. 4 is a graph showing the change in compressive strength according to the curing period of the present invention including the hair fiber and the conventional specimen not containing the hair fiber. As a whole, the uniaxial compressive strength increased with an increase in the curing period, The specimens showed a marked increase in strength compared to the specimens not mixed with hair fibers. In addition, the specimens mixed with the hair fibers maintained a higher strength than the specimens not mixed with the hair fibers after fracture (see FIG. 5). These results directly indicate that the strength enhancement of the soil modifier occurs by mixing the hair fibers. Figure 6 shows the fracture surface of the specimen after fracture and shows that the hair fibers of the specimen mixed with the hair fiber are distributed on the fracture surface.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited thereto and that various changes and modifications may be made therein without departing from the scope of the invention.

Claims (12)

Soil remediation using hair fibers containing the hair fibers injected into the ground or agitated with the ground. [2] The soil conditioner of claim 1, wherein the hair fibers are human or animal hair fibers. The soil conditioner according to claim 2, further comprising a cement-based solidifying agent. The soil conditioner according to claim 2, further comprising a lime-setting solidifying agent. The soil conditioner according to claim 3 or 4, wherein the admixture further comprises at least one of fly ash, blast furnace slag, and silica fume. [5] The soil conditioner according to claim 3 or 4, wherein the admixture further comprises at least one of an AE agent, a water reducing agent, a rapid setting agent, a fluidizing agent, an AE water reducing agent, a hardener, . Improvement method of ground using hair fiber which injects hair fiber into ground or stirs with ground. [8] The method of claim 7, wherein the hair fiber is a hair fiber of a person or an animal. [9] The method of claim 8, further comprising a cement-based solidifying agent. 9. The method of claim 8, further comprising a lime-setting solidifying agent. The method of claim 9 or 10, further comprising at least one of fly ash, blast furnace slag, and silica fume as an admixture. 11. The method of claim 9 or 10, wherein the admixture further comprises at least one of an AE agent, a water reducing agent, a rapid setting agent, a fluidizing agent, an AE water reducing agent, a hardener, .

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