KR101377981B1 - Composition for hardening soil and method for paving soil road using same - Google Patents

Abstract

The present invention is provided with a composition for hardening soil and a method for paving a soil road using the same. The composition for hardening soil includes: 60-80 % of calcium raw material by weight, 5-20 % of silicon dioxide (SiO2) by weight, 1-15 % of aluminum oxide (Al2O3) by weight, 1-15 % of sulfur trioxide (SO3) by weight, 0.1-10 % of magnesium carbonate (MgCO3) by weight, 0.1-25% of iron oxide (Fe2O3), magnesium oxide (MgO), potassium oxide (K2O), and/or a group of inorganic metallic oxide chosen from above. The calcium raw material includes 50-500 portion of calcium oxide (CaO) by weight, and 1-50 portion of calcium hydroxide (Ca(OH)2) by weight, among the total 100 portion of calcium carbonate (CaCO3) by weight. [Reference numerals] (AA) Paving a soil road; (S1) Step for producing a soil curing agent composition; (S2) Step for producing a pulling material; (S3) Step for pulling and hardening

Description

Soil hardener composition and soil road composition method using the same {COMPOSITION FOR HARDENING SOIL AND METHOD FOR PAVING SOIL ROAD USING SAME}

The present invention relates to a nature-friendly soil hardener composition and a soil road composition method using the same.

By nature, the term "path" refers to a passage that is naturally or artificially constructed to facilitate driving of people, vehicles, and equipment.

As the quality of life improves, interest in the surrounding environment and landscape continues to increase, and accordingly, there are increasing cases of ecological restoration of rivers and rivers near the city center or residential areas and using them as leisure spaces. In particular, rivers around the city center provide not only leisure spaces but also promenades for sports activities for residents. As a result, most newly constructed rivers are designed and constructed with walking paths suitable for such outdoor activities.

Playgrounds and trails that are frequently used as leisure activities are best made from the local soil in terms of natural scenery. However, it is not easy to obtain a good quality material suitable for the pedestrian path, and when using the soil in its natural state as it is, durability and stability is poor, so it is practically difficult to construct a road using only the soil.

When constructing soil pavements such as trails, nature trails, park walks, and bicycle paths around ecological rivers, pedestrians are primarily used, so high strengths such as concrete and asphalt concrete are not required. Nature-friendly aspects, such as improved visual satisfaction, are more emphasized.

Currently, the technology for constructing a dirt road or trail in Korea is mainly constructed by a wet pavement method with a relatively short construction period and easy maintenance. However, this method mainly mixes a large amount of aggregate and cement with water, mixes some ocher powder or artificial pigment into the mixture, and then pours and compacts using ready-mixed concrete. Therefore, it is far from the natural beauty that promotes eco-friendliness.

In addition, a soil hardener is used to harden the soil during the construction of the soil road as described above to have appropriate strength and durability. Conventional powder-based soil hardener was used by dissolving in water at the site, but its low solubility had low efficiency. In addition, the aqueous solution of the soil hardener had a problem of low long-term storage such as precipitation occurs. Accordingly, there is a need for the development of improved soil hardeners in terms of compatibility with the soil, solubility, long-term storage.

Korean Patent Publication No. 1998-0083572 (published Dec. 5, 1998) Korean Patent Publication No. 2004-0059517 (published Jul. 6, 2004) Korean Patent Publication No. 2011-0101685 (published Sep. 16, 2011)

An object of the present invention is to provide a soil-friendly curing agent composition and a soil road composition method having excellent durability using the same.

In order to achieve the above object, according to an embodiment of the present invention, 60 to 80% by weight of calcium raw material, 5 to 20% by weight of silicon dioxide (SiO ₂ ), 1 to 15% by weight of aluminum oxide (Al ₂ O ₃ ), 1 to 15% by weight of sulfur trioxide (SO ₃ ) and 0.1 to 10% by weight of magnesium carbonate (MgC0 ₃ ), wherein the calcium raw material is calcium oxide (CaO) 50 to 500 based on 100 parts by weight of calcium carbonate (CaC0 ₃ ) There is provided a soil hardener composition comprising 1 part by weight and 50 parts by weight of calcium hydroxide (Ca (OH) ₂ ).

The soil hardener composition is an inorganic metal oxide selected from the group consisting of iron oxide (Fe ₂ O ₃ ), magnesium oxide (MgO), potassium oxide (K ₂ O) and mixtures thereof from 0.1 to 0.1 with respect to the total weight of the soil hardener composition. It may further comprise 25% by weight.

In addition, the soil hardener composition may further comprise magnesium fluorosilicate as 0.1 to 5% by weight based on the total weight of the soil hardener composition.

According to another embodiment of the present invention, preparing the soil hardener composition; Mixing the soil hardener composition and soil to produce a deposit; And there is provided a dirt road forming method comprising the step of laying and compacting the laying material.

In the soil road composition method, the soil and the soil hardener composition in the preparation of the laying material may be mixed in a weight ratio of 85:15 to 95: 5.

In addition, water may be further added in an amount of 5% by weight or less based on the total weight of the mixture of the soil and the soil hardener composition in the preparation step of the laid laying material.

In addition, the dirt road composition method may further comprise the step of installing the boundary stone before the installation process.

The boundary stone may be an in-situ buried boundary block.

In addition, the in-situ buried boundary block may have a thickness of 70 to 90% with respect to the construction thickness of the dirt road.

Other details of the embodiments of the present invention are included in the following detailed description.

The soil hardener composition according to the present invention is a nature-friendly composition that does not use chemical additives such as an expanding agent or a book pigment. In addition, by using the soil curing agent composition when using the soil soil composition as the main material in the soil soil composition can be constructed a dirt road with sufficient durability without using cement. Accordingly, the soil hardener composition is natural in rivers, parks, and other leisure spaces, which are formed as city centers and nature-friendly spaces, and is useful for forming dirt roads having no harmfulness and excellent walking and visibility.

1 is a process diagram schematically showing a soil road composition method using a soil hardener composition according to an embodiment of the present invention.
Figure 2 is a schematic diagram schematically showing a sorting and mixing device that can be used in the laying material manufacturing step when the soil road composition by the soil road composition method according to an embodiment of the present invention.
Figure 3 is a schematic diagram showing the formation process of the position buried boundary block in the dirt road composition by the soil road composition method according to an embodiment of the present invention.
Figure 4 is a graph showing the weight change and small percentage change of the specimen after the freeze thaw test on the soil road in Test Example 3.

The present invention is capable of various modifications and various embodiments and is intended to illustrate and describe the specific embodiments in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

According to one embodiment of the invention, calcium raw material 60 to 80% by weight, silicon dioxide (SiO ₂ ) 5 to 20% by weight, aluminum oxide (Al ₂ O ₃ ) 1 to 15% by weight, sulfur trioxide (SO ₃ ) 1 To 15% by weight and 0.1 to 10% by weight of magnesium carbonate (MgC0 ₃ ), wherein the calcium raw material is 50 to 500 parts by weight of calcium oxide (CaO) and calcium hydroxide (Ca) based on 100 parts by weight of calcium carbonate (CaC0 ₃ ) (OH) ₂ ) It is provided with a soil hardener composition comprising 1 to 50 parts by weight.

The calcium carbonate, calcium oxide and calcium hydroxide are calcium raw materials that promote the curing action of the soil hardener composition on the soil.

The calcium raw material may be included in an amount of 60 to 80% by weight based on the total weight of the soil hardener composition in consideration of the effects of promoting the hardening effect of calcium and the strength of the construction body prepared using the soil hardener composition. have. If the content of calcium raw material is less than 60% by weight, the hydration reaction between the soil and the soil hardener composition does not occur sufficiently. If the content of calcium raw material is more than 80% by weight, the initial curing rate due to the hydration reaction between the amount and the soil hardener composition is rapid. It is not preferable because there is a possibility that cracks and long-term strength decreases in the final product to be manufactured is accelerated.

In the calcium raw material as described above, the calcium carbonate serves to increase the early strength by densely filling the empty space in the soil with the role of calcium source.

In addition, the calcium oxide serves as a calcium source together with the above-mentioned calcium carbonate and at the same time serves to increase the early strength, it may be preferably included in 50 to 500 parts by weight based on 100 parts by weight of calcium carbonate. If the content of calcium oxide is less than 50 parts by weight, the effect of calcium oxide is insignificant, and if the content of calcium oxide is more than 500 parts by weight, the curing speed is too high, the strength characteristics of the construction prepared using the soil hardener composition It is unpreferable because it may fall. More preferably, the calcium oxide may be included in an amount of 50 to 250 parts by weight, even more preferably 60 to 180 parts by weight, based on 100 parts by weight of calcium carbonate.

In addition, the unreacted Ca (OH) with CaC0 _3, and MgC0 ₃ coming out of the process of the calcium source material is converted into a clean gas to collect the CO ₂ gas by means of greenhouse gas collection reuse techniques (CCU technology, Carbon Capture and Utilization) It may include _two . The materials are commonly present in natural marble, limestone, calcite, and the like, and are preferable in terms of greenhouse gas emission reduction effect and reuse of resources. The Ca (OH) ₂ may be included in an amount of 1 to 50 parts by weight based on 100 parts by weight of calcium carbonate. When the content of Ca (OH) ₂ is less than 1 part by weight, the effect of using Ca (OH) ₂ is insignificant, and when the content of Ca (OH) ₂ is more than 50 parts by weight, the strength characteristics of the construction body may be lowered, which is not preferable. Preferably it may be included in 1 to 10 parts by weight.

In addition, in the above-mentioned soil hardener composition, silicon dioxide serves to improve the cohesion of the soil, it may be preferably included in 5 to 20% by weight relative to the total weight of the composition. If the content of silicon dioxide is less than 5% by weight, the volume of the soil may be uneven due to the intermediate crosslinking role in the reaction between the soil and the hardener composition, and as a result, the strength of the construction body may be lowered, and the content is more than 20% by weight. If so, there is a fear that the hydration reaction between the soil and the hardener composition is sharply reduced. More preferably the silicon dioxide may be included in 10 to 15% by weight relative to the total weight of the soil hardener composition.

In addition, in the soil hardener composition, the aluminum oxide serves to increase the cohesion of the soil, it may be preferably included in 1 to 15% by weight relative to the total weight of the soil hardener composition. If the content of aluminum oxide is less than 1% by weight, there is a fear that the curing rate of the soil is too slow, and if the content of the aluminum oxide exceeds 15% by weight, the initial curing rate due to the hydration reaction between the soil and the soil hardener composition is rapidly accelerated, causing cracks and long-term. There is a possibility that a decrease in strength may occur. More preferably, the aluminum oxide may be included in 5 to 10% by weight based on the total weight of the soil hardener composition.

In addition, in the soil hardener composition, sulfur trioxide plays a role of controlling the curing rate of the soil hardener composition, and may be preferably included in an amount of 1 to 15% by weight based on the total weight of the soil hardener composition. If the content of sulfur trioxide is less than 1% by weight, there is a fear that the curing rate of the soil is too slow, if the content of more than 15% by weight, the initial curing rate by the hydration reaction between the soil and the soil hardener composition rapidly accelerates cracking and long-term strength There is a possibility that a decrease may occur. More preferably the sulfur trioxide may be included in 5 to 10% by weight relative to the total weight of the soil hardener composition.

In the above-mentioned soil hardener composition, magnesium carbonate is produced in the process of capturing and converting CO ₂ gas into a clean gas by using a greenhouse gas collection and recycling technology as described above. Play a role. Such magnesium carbonate may be included in an amount of 0.1 to 10% by weight based on the total weight of the soil hardener composition. If the content of magnesium carbonate is less than 0.1% by weight, the improvement effect due to the addition of magnesium carbonate is insignificant, and if it exceeds 10% by weight, the initial curing rate by the hydration reaction between the soil and the soil hardener composition is rapidly accelerated, causing cracking and long-term strength. There is a possibility that a decrease may occur. More preferably, the magnesium carbonate may be included in an amount of 0.1 to 5% by weight based on the total weight of the soil hardener composition.

In addition, the soil hardener composition is an inorganic metal oxide selected from the group consisting of iron oxide (Fe ₂ O ₃ ), magnesium oxide (MgO), potassium oxide (K ₂ O) and mixtures thereof to improve the cohesion of the soil hardener composition total. It may further comprise 0.1 to 25% by weight, preferably 0.1 to 5% by weight relative to the weight.

The content of each component included in the inorganic oxide is not particularly limited, but in the case of iron oxide for promoting the hydration reaction between the soil and the soil hardener composition, it may be preferably included in an amount of 0.1 to 10% by weight based on the total weight of the hardener composition. Can be. In addition, the magnesium oxide may be included in 1 to 10% by weight based on the total weight of the curing agent composition. In addition, the potassium oxide may be preferably included in 0.1 to 7% by weight based on the total weight of the curing agent composition. More preferably, the iron oxide may be included in an amount of 0.1 to 5% by weight, 1 to 3% by weight of magnesium oxide, and 0.1 to 3% by weight of calcium oxide, based on the total weight of the soil hardener composition.

In addition, the soil hardener composition may further include magnesium fluorosilicate (MgSiF ₆ ) to delay curing and increase pot life. The magnesium fluorosilicate increases the strength of the construction body after drying while increasing the fluidity during fixing the dirt road composition, and improves the waterproofness. Accordingly, the magnesium fluorosilicate may be included in an amount of 0.1 to 5% by weight based on the total weight of the soil hardener composition.

The components for forming the soil hardener composition as described above are mixed in particulate form, where it may be desirable to have a particle size of 180 to 230 mesh for homogeneous mixing with the soil and increased adhesion.

The soil hardener composition having the above-mentioned composition does not use artificial chemicals, such as a swelling agent or a pigment, and contains Ca as a main component, and thus does not exhibit harmful effects to humans and the surrounding environment even after prolonged exposure. It is an environmentally friendly material to meet. In addition, it is possible to exhibit sufficient resistance to sudden changes in climatic conditions by minimizing the occurrence of cracks, which is a problem of conventional general soil pavement, and improving durability due to excellent hardening action for soil. By using this, it is possible to achieve a natural harmony with the surrounding environment when constructing the dirt road, and in the case of the conventional cement-based hardener, a large amount of water was required to fluidize the soil mixed with the soil hardener composition, and as a result, it was able to withstand the pavement in a short time. Although it was difficult to obtain strength, the soil hardener composition according to the present invention does not use cement at all, so a large amount of water is not needed. Accordingly, in a simple process, it is possible to form a dirt road having excellent durability in a short time. In this case, the dirt road may be various types of dirt roads such as a pedestrian path, a walkway, a square, and the concrete road, which is constructed by installing an in-situ landfill boundary block made of eco-friendly materials such as wood and stone at the boundary between the dirt road and the surrounding ground. Can be.

According to another embodiment of the present invention, preparing the soil hardener composition; Mixing the soil hardener composition and soil to produce a deposit; And there is provided a dirt road forming method comprising the step of laying and compacting the laying material.

1 is a process diagram schematically showing a soil road composition method according to an embodiment of the present invention. 1 is only an example for describing the present invention and the present invention is not limited thereto.

Referring to Figure 1, step 1 is a step of preparing a soil hardener composition (S1).

The soil hardener composition may be prepared by mixing calcium carbonate, calcium oxide and calcium hydroxide, and silicon oxide, aluminum oxide, sulfur trioxide, magnesium carbonate and other additives as calcium raw materials, and each component and its content are the same as described above. Do.

In order to increase the mixing efficiency of each component during the production of the soil hardener composition, a mixing treatment according to a conventional method such as stirring may be selectively performed.

In addition, after the mixing of each of the components may be further carried out a crushing process to have a particle size to increase the compatibility with the soil, and to exhibit excellent adhesion to the soil. The mixture obtained through the grinding process may be preferably subjected to the grinding process to have a particle size of 180 to 230 mesh.

Step 2 is a step of preparing a laying material by mixing the soil hardener composition prepared in step 1 with the soil (S2).

The soil is not particularly limited, and may be soil at a dirt road construction site. Specifically, it may be sand of coarse soil, and it may be preferable to include fine grains having an average particle diameter of 100 μm or less by 10 wt% or more.

To this end, a screening process for separating the soil that meets the above conditions with respect to the soil before mixing with the soil hardener composition can be carried out.

When mixing the soil and the soil hardener composition it may be desirable to mix in a weight ratio of 85:15 to 95: 5. If the content of the soil hardener composition in the soil is too small, curing takes a long time, which is not preferable. If the content of the soil hardener composition in the soil is too large, the degree of improvement effect according to the increase in the amount of use is insignificant.

The soil occupies most of the installation material in the construction of the dirt road, specifically, it may be preferably included in an amount of 85% or more, preferably 85 to 95%.

In addition, the maximum dry density and the optimum water content can be calculated through the water content and the compaction force of the soil when preparing the deposit by mixing the soil and the soil hardener composition, and water may be further mixed in an amount to satisfy the same. Specifically, the water may be included in an amount of 5 wt% or less based on the total weight of the mixture of the soil and the soil hardener composition. If the content of water exceeds 5% by weight, it is not preferable because curing takes a long time.

The mixing process of the soil and the soil hardener composition may be carried out using a conventional mixing method or a mixing device, specifically, it may be preferable to mix using a selective mixing device as shown in FIG.

The screening mixing apparatus of FIG. 2 is a screening apparatus 1 for screening soil, a first transport apparatus including a conveyor 2a for transporting the sorted soil to a soil metering device, and a motor 2b for operating the conveyor, A second comprising a soil metering device 3 for weighing the conveyed soil, a conveyor 4a for conveying the metered soil to a mixing device for mixing with the soil hardener composition and a motor 4b for operating the conveyor And a meter (not shown) for metering the soil hardener composition to supply the soil hardener composition in a predetermined proportion according to the conveying device, the weight of the soil being screened and weighed and transported. A mixing device 5 for feeding and mixing soil, a conveyor 6a for carrying the mixed soil mixed in the mixing device, and a motor 6b for operating the conveyor. A third transport device comprising, an automatic water injector (7) for injecting water with a controlled content so as to have an optimum water content from the water content in the natural state of the soil for the mixed soil, and an outlet for discharging the resultant laid material ( 8), and may further include a stirring device (9) for uniform mixing of the soil and the soil hardener composition.

By using the sorting mixing device as described above, it is difficult to quantitatively improve the soil and the hardener, and unlike the conventional sorting and mixing equipment which cannot adjust the water content of the raw soil in the mixing process, the raw soil and the soil hardener composition for screening and mixing In the process, it is possible to constantly improve the blending aroma of the curing agent composition according to the weight of the soil, and to maintain a proper water content by the water spraying device, it is possible to express a uniform quality.

Step 3 is a step of laying and compacting the installation material prepared in step 2 (S3).

The laying process may be carried out according to a conventional laying method, and in particular, after transporting the laying material to a place where packaging is required, using an equipment such as an excavator or a bulldozer to spread the approximate amount on the ground to be packed. It may be desirable to be carried out by a mechanical laying process and a manpower laying process in which the worker forms the laying material so as to have a uniform packing height on the packaged board in a state unfolded on the paved ground in a continuous process.

As a result of the installation process, a compaction process may be performed by using a device such as a tire roller to install the installation material having a uniform packing height on the ground to be packaged.

The thickness of the dirt road to be formed may vary depending on the use of the dirt road, and in particular, it may be preferably 10 to 20 cm.

In addition, the soil road composition method may further include an auxiliary base layer forming step before the installation process.

The auxiliary base layer includes a mixed aggregate including gravel or soil or cement, and functions as a support for the dirt road layer. Such subbases are particularly useful in support-based vulnerable areas, and the method of forming the subbases may be carried out according to conventional methods.

The thickness of the auxiliary base layer is not particularly limited, and it may be desirable to have a thickness capable of providing sufficient supporting force according to the thickness of the dirt road and the structure of the ground of the dirt road formation area. Specifically, it may be desirable to have a thickness of 10 to 30 cm.

In addition, the method for forming the soil road may further include a step of installing a boundary stone for the boundary between the soil road and the surrounding ground ground formed before the installation process after the formation of the auxiliary base layer. The boundary stone installation step can be carried out according to a conventional method.

However, in case of not installing the boundary stone between the constructed dirt road and the surrounding ground, the in-situ embedded border block made of eco-friendly materials such as wood and stone to express the natural connection between the dirt road and the surrounding ground along with the conventional boundary stone function. You can also install

3 is a schematic diagram schematically showing the in-situ embedded block. 3 is only an example for describing the present invention and the present invention is not limited thereto.

Referring to Figure 3, when installing the in-situ buried boundary block instead of installing the conventional boundary stone, it may be desirable to install the in-situ buried boundary block with a thickness of 70 to 90% of the construction thickness of the dirt road.

As the in-situ buried boundary block, environmentally friendly materials such as wood and stone may be used. More specifically, the in-situ embedded block may be a rectangular block having a rectangular cross section, a wedge shape, or a circular shape.

In addition, when the in-situ buried boundary block is installed, a fixing pin for fixing the boundary block may be selectively performed.

By the above-described dirt road composition method, the dirt road exhibiting excellent durability even in a sudden temperature change and having sufficient uniaxial compressive strength can be effectively formed.

In addition, the dirt road construction method according to the present invention is a dry pavement method by using the soil as a main material, in particular on the site alumina, 85% or more, and by using no artificial additives, such as coloring pigments to express the color at all nature-friendly dirt road Can be formed. In addition, by using the above-mentioned soil hardener composition, it is possible to minimize the occurrence of cracks, which is a problem of general soil pavement, to improve durability and at the same time to construct an environmentally friendly dirt road difficult to mix in the conventional ready-mixed concrete method.

The construction body constructed according to the above method has a high durability that can exhibit sufficient resistance to rapid changes in climatic conditions such as temperature conditions.

Hereinafter, the present invention will be described in more detail with reference to specific examples. However, the following examples are merely to specifically illustrate the present invention, and the contents of the present invention are not limited by the following examples.

Manufacturing example

15% by weight of Si0 ₂ , 10% by weight of S0 ₃ , 6% by weight of Al ₂ 0 ₃ , MgC0 together with 50% by weight of CaO, 12% by weight of CaC0 ₃ , and 1% by weight of Ca (OH) _{2 in the} reactor ₃ 1% by weight, MgO 3% by weight and Fe ₂ 0 ₃ 2% by weight was mixed to prepare a soil hardener composition.

Test Example 1

The soil used in the construction of the soil road according to the present invention was carried out a basic physical property test, specific gravity test, compaction test and permeability test. The results are listed in Table 1 together with the test methods.

Item Test Methods Test result Specific gravity (Gs) KS F 2308 2.60 Water content ratio (Wn) KS F 2306 12.5% Particle Size Analysis (Unification Classification) KS F 2302 SM * Liquid Limit (LL) KS F 2303 NP ** Firing limit (PL) KS F 2304 NP ** Dry density (γdmax, t / m ³ ) KS F 2312 1.906 Optimal function ratio (O.M.C) KS F 2312 13.2% Permeability coefficient (cm / sec) KS F 2312 3.5X10 ^-5

* SM: Sand of granulated soil, containing more than 12% by weight of fine grain (mo)

** NP Non Plastic

As a result, the soil used for the construction of the soil road was analyzed as a sandy soil series with silt and sand as SB based on the unification classification method. The maximum dry density of the soil was 1.906 g / cm ³ and the optimum moisture content (OMC) was 13.2%.

Test Example 2

The soil hardener composition prepared in Preparation Example was subjected to a hazardous substance dissolution test for component analysis and environmental review. The results are shown in Table 2 below.

division Ingredient (% by weight) CaO SiO ₂ CaCO ₃ SO ₃ Al ₂ O ₃ MgO Fe ₂ O ₃ Weight loss Soil Hardener Composition of Preparation Example 1 49.2 14.5 10.1 9.8 5.5 2.2 1.8 5.2

As shown in Table 2, the CaO component occupies a substantial portion of about 49.2%, Si0 ₂ component about 14.5%, CaC0 ₃ component about 10.1%, S0 ₃ component 9.8%, Al ₂ 0 ₃ component About 5.5%, the MgO component was 2.2%, the Fe ₂ O ₃ component was 1.8% and the loss on ignition was 5.2%.

In addition, as a dissolution test for hazardous substances according to the Waste Management Act, detection of lead (Pb), cadmium (Cd), hexavalent chromium (Cr ^{6 +} ), arsenic (As), mercury (Hg), and cyan ion (CN-) It was confirmed. The results are shown in Table 3 below.

division Hazardous Substances (ppm) Pb CD Cr ⁶⁺ As Hg CN Acceptance Criteria by Waste Management Act 3 0.3 1.5 1.5 0.005 1.0 Soil Hardener Composition of Preparation Example 1 ND * ND ND ND ND ND

* ND Not Detectable

As shown in Table 3, the heavy metal component in the hardener composition was not detected, from which it can be confirmed that the soil hardener composition according to the present invention is an environmentally friendly material.

Test Example 3

When the soil road construction using the soil hardener composition according to the present invention, in order to evaluate whether the constructed soil road has sufficient durability and stability to withstand the climate change phenomenon of Samhan Saon, which is the winter climate characteristic of Korea, freeze thawing The test was carried out and observed for cracks caused by freezing and thawing.

Specifically, the freeze-thawing test was carried out according to the freeze-thaw test (KS F 2332) regulations shown in Table 4 for the soil, cement mixture compacted by the KSF test regulations issued by the Korean Standards Association.

Test Name Freeze-thawing test of compacted soil and cement mixtures (KS F 2332) Cycle basis 1 cycle (48 hours): Tested at -23 ° C (24 hours) and 21 ° C (23 hours)
12 cycles in total Evaluation items Weight loss rate of specimens by freeze thawing cycle (%)

The soil was prepared by mixing the soil containing the mixture of the ground soil and cement and the soil hardener composition prepared in the above preparation in various mixing ratios (mixing weight ratio of soil: soil hardener composition = 95: 5, 90:10 and 85:15). The resistance to freezing and thawing was evaluated by observing the change of specimen weight after damage caused by the freezing and thawing experiment. At this time, as a comparative example, a specimen molded only from soil was used.

The weight loss rate of these four specimens was calculated every third cycle until the end of the 12 cycles, and the results are shown in Table 5 and FIG. 4.

division Content of Soil Curing Composition (% by weight) Weight reduction rate (%) 3 cycles 6 cycles 9 cycles 12 cycles Comparative Example - - - - - Example 1 5 2.2 2.5 3.3 3.4 Example 2 10 0.9 1.2 1.3 1.8 Example 3 15 0.4 0.5 1.0 1.2

As shown in Table 5 and FIG. 4, as a result of calculating the weight loss rate after 12 cycles, in the case of the specimen of the comparative example made only of ordinary soil, the specimen was damaged so that the weight change rate could not be measured, and thus the weight change measurement was impossible. It was. This indicates that even if the soil is compacted to the maximum, water absorption and absorbed water cannot function as a pedestrian path when the freezing and thawing are repeated in the specimen. On the other hand, in the case of the specimen including the soil hardener composition according to the present invention at 5% by weight of the total weight of the specimen, the weight reduction rate was 3.4% after the end of 12 cycles, 1.8% for the specimen having a compounding weight of 10% by weight, 15% As the weight percentage of the specimen, such as 1.2%, the weight loss rate of the specimen showed a gentle change as the content ratio of the soil hardener composition increased. From the experimental results, it can be seen that the specimen prepared using the soil hardener composition according to the present invention exhibits excellent freeze-thawing resistance against rapid temperature change.

Test Example 4

Except for using the respective components in the amounts shown in Table 6 to the same method as in the preparation example to prepare a soil hardener composition, and the durability change according to the components and content for the prepared soil hardener composition Evaluated.

The durability evaluation was carried out in the same manner as in Test Example 3, except that 5% by weight of the soil hardener composition having a composition according to Table 6. The results are shown in Table 6 together.

Remarks Example 4 Example 5 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 CaC0 ₃ 12 12 12 - 48 12 15 12 12 12 CaO 60 48 36 60 12 60 60 60 60 60 Ca (OH) ₂ 1.2 6 6 6 6 - 5 6 4 3 SiO ₂ 10 15 20 15 15 9 - 9 10 10 Al ₂ O ₃ 6 6 10 6 6 6 6 - 6 6 SO ₃ 5 5 8 5 5 5 5 5 - 5 MgC0 ₃ 1.8 4 4 4 4 4 4 4 4 - MgO 2 2 2 2 2 2 2 2 2 2 Fe ₂ O ₃ 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 K ₂ O 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 Other additives
(MgSiF ₆ ) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 % Weight loss after 12 cycles 3.1 3.5 4.8 7.2 5.3 6.8 6.4 6.7 6.6 6.1

As shown in Table 6, Examples 2 and 3 satisfying the optimum combination of the soil hardener composition according to the present invention showed a markedly improved durability compared to Comparative Examples 2-9.

From the above experimental results, the soil hardener composition according to the present invention is an environmentally friendly material that satisfies the waste management law acceptance criteria, and when using the soil road construction, the construction body can exhibit sufficient resistance to rapid changes in temperature. It can be seen that it has high durability.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

1: screening device
2a, 4a, 6a: conveyor
2b, 4b, 6b: motor
3: soil metering device
5: mixing device
7: automatic water injector
8: outlet
9: stirring device

Claims (9)

Calcium raw material 60-80% by weight,
Silicon dioxide (SiO ₂ ) 5 to 20% by weight,
1 to 15% by weight of aluminum oxide (Al ₂ O ₃ ),
Sulfur trioxide (SO ₃ ) 1 to 15% by weight,
Magnesium carbonate (MgC0 ₃ ) 0.1 to 10% by weight, and
0.1 to 25% by weight of an inorganic metal oxide selected from the group consisting of iron oxide (Fe ₂ O ₃ ), magnesium oxide (MgO), potassium oxide (K ₂ O), and mixtures thereof,
The calcium raw material is a soil hardener composition comprising 50 to 500 parts by weight of calcium oxide (CaO) and 1 to 50 parts by weight of calcium hydroxide (Ca (OH) ₂ ) based on 100 parts by weight of calcium carbonate (CaC0 ₃ ).
delete The method of claim 1,
The soil hardener composition is a soil hardener composition further comprises 0.1 to 5% by weight of magnesium fluorosilicate relative to the total weight of the soil hardener composition.
Preparing a soil hardener composition according to claim 1;
Mixing the soil hardener composition and soil to produce a deposit; And
Laying and compacting the laid material
Dirt road composition method comprising a.
5. The method of claim 4,
Soil road in the manufacturing step of the laying material is a soil road composition method that is mixed in a weight ratio of 85:15 to 95: 5.
5. The method of claim 4,
Dirt road composition method for adding more water in an amount of 5% by weight or less based on the total weight of the mixture of the soil and the soil hardener composition in the manufacturing step of the laying material.
5. The method of claim 4,
Dirt road forming method further comprising the step of installing the boundary stone before the installation process.
8. The method of claim 7,
The boundary stone is a dirt road forming method of the original position buried boundary block.
9. The method of claim 8,
The in-situ buried boundary block is a dirt road construction method having a thickness of 70 to 90% of the dirt road construction thickness.

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