KR101283630B1 - Soil paving composition and method for paving ground using thesame - Google Patents

Abstract

The present invention relates to a soil pavement composition using a magnesium-based solidified material and a road pavement method using the same, and more specifically, using a magnesium-based solidified material and a polymer admixture as a binder, and the waste refractory coarse aggregate with soil as the main material In addition to improving the weather resistance, water-retainability and durability of the soil packaging composition, as well as environmentally friendly.
To this end, the soil paving composition using the magnesium-based solidified material of the present invention and the road paving method using the same are 29.5 to 43% by weight of soil, 53 to 60% by weight of coarse aggregate of waste refractories, 3 to 10% by weight of magnesium-based solidified material and polymer admixture It comprises 0.15 to 0.5% by weight, and water is mixed here so that the optimum water content (OMC) of the soil packaging composition is in the range of 10 to 16%.

Description

Soil paving composition using magnesium-based solidified material and road paving method using same {{SOIL PAVING COMPOSITION AND METHOD FOR PAVING GROUND USING THESAME}

The present invention relates to a soil pavement composition using a magnesium-based solidified material and a road pavement method using the same, and more specifically, using a magnesium-based solidified material and a polymer admixture as a binder, and the waste refractory coarse aggregate with soil as the main material In addition to improving the weather resistance, water-retainability and durability of the soil packaging composition, as well as environmentally friendly.

Due to artificial concentration in the city center, heat island phenomena where local temperature rises locally due to the increase of artificial arrangement, decrease of green spaces by buildings, and deterioration of atmospheric purification due to urbanization are becoming a big social problem. It is pointed out that this is related to the increase of heat stroke, urbanized heavy rain and increase of photochemical oxidant concentration with the increase of tropical night in summer. The vicious cycle in which the heat island phenomenon further progresses due to the increase in temperature for air irradiation (energy use) is generated.

In addition, since sidewalks, driveways, parks, and parking lots in urban areas all use concrete pavement or asphalt pavement, water is introduced into drains and discharged into drains early, and water stored on the pavement evaporates early. .

For this reason, as the temperature rises in the downtown area, the pavement surface becomes a high temperature, so that a heat island (heat island) phenomenon occurs that increases the downtown temperature and worsens the living environment.

Therefore, in order to reduce the heat island phenomenon caused by artificial packaging, it is necessary to develop a packaging material that can easily supply moisture to the basement, have a low heat capacity, and repair moisture. Soil packaging is being developed in this context.

Conventional soil packaging methods include cement-based soil packaging and resin-based soil packaging. The characteristics and problems of each method will be described below.

First of all, cement-based soil pavement has high strength characteristics when the amount of cement used is high, but it is less comfortable in terms of texture due to rigid pavement, and there is a risk of leaching heavy metals such as hexavalent chromium due to the increase of cement use. Because it is not environmentally friendly to soil, it is also less useful in terms of recycling. In addition, when the amount of cement used in the cement-based soil packaging is less used, it is difficult to express the strength of soil packaging requirements, and there is a concern that cracks due to freeze-thawing and dry shrinkage may occur, making it difficult to secure durability of the packaging.

In the conventional resin-based soil packaging, colorless resin is used, so that harmony with the surrounding landscape and clarity of color due to coloring of the soil, color, etc. of the soil is good, but when the resin is exposed to ultraviolet rays for a long time, it may be degraded by ultraviolet rays. Due to the low strength characteristics of soil packaging, it is difficult to secure long-term durability, toxic substances such as volatile organic compounds (VOCs) may be released from chemical resins, and it is difficult to secure the economic feasibility of soil packaging due to the high cost of resin-based binders. There is a problem.

Therefore, the present invention has been devised to improve the problems of the conventional soil pavement, first to solve the problem of less comfort in texture due to the stiffness that is a problem in cement-based soil pavement, eco-friendly instead of cement as a binder An object of the present invention is to improve comfort in terms of texture by using a magnesium-based solidified material mainly made of magnesia as a material.

In addition, in order to improve the strength characteristics of the pavement that is a problem in the existing resin-based soil packaging, by replacing a certain portion of the soil material with thick aggregates of waste refractory that can improve the strength and water retention, together with the improvement of the performance rate In addition, the purpose of the present invention is to improve the pavement temperature reduction function by improving the strength characteristics and the water retention by the aggregate interlocking action.

       It is also an object to use a polymer admixture together as another binder to improve the weather resistance of the packaging from cracking due to freeze thawing and dry shrinkage.

In addition, by using a solid fire mainly made of magnesia, which is an eco-friendly material, it is not environmentally friendly to soil due to the risk of leaching heavy metals such as hexavalent chromium due to the increase of the amount of cement in the existing cement-based soil packaging and the strong alkalinity of the cement. The purpose of this study is to solve problems such as the release of harmful substances such as VOCs due to the use of chemical resins in existing resin-based soil pavement.

In addition, it is an object to provide an environment-friendly earth packaging composition that can be recycled by making the composition using magnesium-based solidified material close to neutral and harmless to the soil as well as recyclable.

Soil packaging composition using the magnesium-based solidifying material of the present invention for achieving the above object is in the soil packaging composition comprising a main material and a binder containing the soil, the main material is made of a thick aggregate and soil and waste refractory The binder is characterized in that it comprises a magnesium-based solidifying material.

In addition, the binder is characterized in that it further comprises a polymer admixture.

In addition, the polymer admixture is characterized in that the styrene butadiene rubber (SBR) emulsion.

In addition, the magnesium-based solidified material is characterized in that it is prepared by mixing 50 to 75% by weight of magnesia, 20 to 40% by weight of blast furnace slag and 5 to 10% by weight of magnesium sulfate.

In addition, the waste refractory coarse aggregate is characterized in that the mixture of one or two of alumina refractory and clay refractory.

In addition, the soil packaging composition is characterized in that it comprises 29.5 to 43% by weight of soil, 53 to 60% by weight of the coarse aggregate of waste refractories, 3 to 10% by weight of magnesium-based solidified material and 0.15 to 0.5% by weight of a polymer admixture. .

In addition, the earth packaging composition further comprises water, wherein the water is characterized in that the mixing so as to be in the range of 10 to 16% of the optimum water content (OMC) of the earth packaging composition.

In addition, the 7-day curing indirect tensile strength of the soil packaging composition containing the water is characterized in that 0.5 ~ 1.0MPa.

And the road paving method using the soil pavement composition according to the present invention comprises the steps of transporting the soil pavement composition using the magnesium-based solidified material to the city factory, the step of laying and voltage carrying the transported soil pavement composition, the soil And finishing the paving surface with the packaging composition laid and voltaged, and curing the paving surface with the surface finished.

According to the soil pavement composition using the magnesium-based solidified material according to the present invention and the road pavement method using the same, in terms of texture compared to the cement-based solidified material because the main binder is magnesia, which is an eco-friendly material similar in texture to the soil material, as the main raw material In addition to improving comfort, there is no risk of elution of heavy metals such as hexavalent chromium and harmful substances such as VOCs. Provides useful effects to enhance

In addition, by using a polymer admixture as a binder, it prevents and suppresses the occurrence of cracks caused by the freeze-thaw and summer dry shrinkage, which is a problem of the existing soil packaging, and provides the effect of improving the weather resistance and durability of the soil packaging composition.

In addition, by replacing a part of the soil, the main material of the soil packaging composition, with thick aggregates of waste refractories, high water retention can be obtained, thereby improving the water retention of the soil packaging composition and improving the packaging temperature reduction function. In addition, it improves the strength and durability of the soil packaging composition according to the interlocking effect of the coarse aggregate, and provides the effect of reducing the amount of waste generated by recycling the waste refractory.

1 is a view showing a curing process of the magnesium-based solidified material of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention comprises a main material and a binder containing the soil, the main material is made of a thick aggregate and soil and refractory material, the binder comprises a magnesium-based solidified material.

Here, the main material of soil is mainly using Masato, and the one generated near the site, and the plasticity limit test results indicate that the plasticity index is NP (Non Plastic), and the particles have a 75 μm sieve less than 10%. It is not limiting. In addition, other types of soil other than Masato may be used.

The waste refractory coarse aggregate used as a main material together with the soil may be alumina refractory or clay refractory, which is a neutral refractory, and alumina refractory and clay refractory may be mixed, but preferably, alumina refractory Mainly used. The waste refractory coarse aggregate is used to crush the waste refractory to aggregate aggregate particle size range of 10 ~ 5mm, 5 ~ 2.5mm alone or mixed.

The waste refractory coarse aggregate improves the strength characteristics of the soil pavement, as well as excellent absorption and repair performance as a porous material, and acts to suppress the heat storage inhibition of the soil pavement and the increase of packaging temperature, and improve the performance rate of the soil pavement composition. Not only to improve, but also to improve the strength and durability of the earth-packed composition by the interlocking effect of the coarse aggregate.

The properties of the waste refractory coarse aggregate is shown in Table 1 below.

Waste aggregate coarse aggregate division Apparent porosity (%) Bulk specific gravity Compressive strength (Kg / ㎠) Representative value 19-24 2.40-2.75 300 or more

Next, the magnesium-based solidified material of the binder is made of a mixture of blast furnace slag and magnesium sulfate as a main raw material of magnesia, which is an environmentally friendly material that can be obtained in nature as a soft material, which is more comfortable in terms of texture than the stiffness of cement-based soil pavement. It improves the sense and can solve problems such as the risk of leaching heavy metals such as hexavalent chromium in cement-based soil pavement, strong alkalinity problems of cement, and concerns about the release of harmful substances such as VOCs due to the use of chemical resins.

Here, the magnesia may be any one prepared from magnesite (MgCO ₃ ) minerals or in seawater (sea water), but the use of seawater light magnesia prepared from seawater is preferable. The small seawater magnesia is obtained by calcining magnesium ions dissolved in seawater by caustic soda, calcined lime, calcined dolomite and the like and then calcining with magnesium hydroxide at a temperature of 600 to 1,000 ° C., specific gravity 3.65, melting point 2,800 ° C., It shows the physical property of boiling point 3,600 degreeC and the refractive index 1.7. In addition, the small seawater magnesia reacts rapidly with water to form magnesium hydroxide [Mg (OH) ₂ ] as shown in FIG. 1, and then reacts with blast furnace slag and sulfate to generate a magnesia ettring guide, and reacts with pozolan in the long term. Thereby forming a durable solid. In addition, the small magnesia has a low thermal expansion rate to suppress the occurrence of cracking of the soil packaging composition, excellent water resistance and very high reflection ability to visible and near ultraviolet rays can improve the thermal insulation of the soil packaging composition have. In addition, the magnesia does not contain heavy metals such as hexavalent chromium and is an environmentally friendly material that can be recycled.

The blast furnace slag is more effective in suppressing alkali aggregate reactions than ordinary Portland cement, reducing heat of hydration, and having excellent fluidity due to watertightness, chemical resistance, and ball bearing action, small bleeding amount, and excellent strength expression at early age. . In addition, the blast furnace slag does not show hydraulic properties even when it is in contact with water, but exhibits significant hydraulic properties when contacted with an alkaline component, and by reacting with magnesium hydroxide produced during hydration of magnesia, a secondary hydrate magnesia ether ring guide is produced. In addition, the secondary hydrate fills the capillary pores of the soil packaging composition, thereby densifying the tissue to improve strength, and in particular, to improve freeze-melt resistance. The properties of the blast furnace slag are shown in Table 2 below.

Blast furnace slag Item Density (㎏ / ㎥) Specific surface area (㎠ / g) Magnesium Oxide (MgO) Sulfur trioxide (SO ₃ ) Weight loss Representative value 2.80 or more 4000-6000 10.0% or less 4.0% or less 3.0% or less

The magnesium sulfate is industrially obtained from the brine which is the mother liquor remaining when salt is precipitated from seawater, and both hydrates and anhydrides are colorless crystals, and the specific gravity is 2.55-2.65, melting point 1,185 ° C and near melting point. Pyrolysis results in magnesium oxide. In addition, it reacts with magnesium hydroxide and blast furnace slag, which are the hydration products of magnesia, to produce magnesia etring guide, and to act as a catalyst for promoting condensation of magnesium-based solidified materials.

Magnesium-based solidified material consisting of magnesium, blast furnace slag, magnesium sulfate as described above is preferably prepared by mixing 50 to 75% by weight of magnesia, 20 to 40% by weight of blast furnace slag and 5 to 10% by weight of magnesium sulfate. It is not necessarily limiting.

In addition, the polymer admixture may be additionally added and used together with the magnesium solidifying agent as the binder, and the polymer admixture may be used to improve the weather resistance of the soil pavement by improving the freeze resistance and crack resistance. As such a polymer admixture, any of an aqueous polymer dispersion and a water-soluble polymer may be used, but preferably, a styrene butadiene rubber (SBR) emulsion may be used.

The styrene butadiene rubber (SBR) emulsion is a copolymer of styrene butadiene rubber, which partially bonds with a combination of inorganic components and cations of the magnesium-based solidifying material to form an overall matrix structure, thereby inducing bonds between inorganic materials. , Improves the workability by increasing the fluidity of the soil paving composition, and excellent viscosity and elasticity function to improve the material separation resistance of the soil paving composition, as well as suppress the occurrence of cracks and increase weather resistance and durability due to the increase in bending and tensile strength It works to improve.

And the soil packaging composition of the present invention is mixed in a mixing ratio of 29.5 to 43% by weight of soil, 53 to 60% by weight of the coarse aggregate of waste refractories, 3 to 10% by weight of magnesium-based solidified material and 0.15 to 0.5% by weight of a polymer admixture. Less than 53% by weight coarse aggregate of waste refractories results in a slight improvement in strength of the soil pavement composition. When it exceeds 60% by weight, the stiffness of the soil pavement composition increases stiffness in terms of texture of the soil pavement composition. This is because there is a risk of reducing the durability of the soil packaging composition by reducing. In addition, when the magnesium-based solidified material is used in less than 3% by weight, the durability and freeze-thawing resistance is weak, and when the magnesium-based solidified material exceeds 10% by weight, the durability is good but there is a risk of cracking. When the polymer admixture is used at less than 0.15% by weight, it is difficult to improve weather resistance and durability. When the polymer admixture exceeds 0.5% by weight, the viscosity of the soil packaging composition is increased, and workability is lowered. Because you can not.

On the other hand, the soil packaging composition according to the invention further comprises water, the water is preferably mixed so that the water is in the range of 10 to 16% of the optimum water content (OMC) of the soil packaging composition. And the 7-day curing indirect tensile strength of the soil packaging composition containing the water is 0.5 ~ 1.0MPa, if the indirect tensile strength is lower than 0.5MPa it is difficult to ensure wear resistance or freeze resistance, if the soil exceeds 1.0MPa The softness of the packaging composition is reduced, there is a problem that the comfort of walking in terms of texture falls.

Hereinafter, the mixing method and the mixing order of the materials used in the preparation of the soil packaging composition using the magnesium-based solidifying material of the present invention are as follows.

First, the powder material is pre-weighed and premixed, and water is mixed directly into the mixer. It is preferable to use a mortar mix or a pug mill mixer as a mixer, and to be conveyed to a construction site and to use it. Mixing procedure is prepared by mixing thick aggregate and soil with waste refractories first and mixing it for 2 ~ 3 minutes with dry bibim, and mixing 2 ~ 3 minutes with magnesium-based solidifying material, polymer admixture and water for 2 ~ 3 minutes. , Soil is to prepare to suit the optimal water content of 10 to 16% range of the packaging composition.

Hereinafter, the road paving method of the soil pavement composition according to the present invention.

First, the soil packaging composition using the magnesium-based solidified materials described above is carried to the factory. When transporting the soil packaging composition to the city factory, the moisture is evaporated so that it is covered with a sheet or the like so as not to deviate from the optimum function ratio range and quickly transported.

When the transport is completed as described above, the transported soil packaging composition is laid and voltage. At this time, before laying the soil pavement composition to confirm the compaction state of the roadbed and base layer to be laid, the laying is to use a machine, such as asphalt finisher, manpower. In the case of voltage, it is necessary to pay attention to the selection of rollers with suitable tonnage, compaction speed and compaction frequency so as not to cause cracks on the pavement. . Around the installation where the voltage is not possible with rollers, the corners are compact or compact.

When the installation and voltage of the soil pavement composition is completed as described above, the pavement surface is finished, and the finishing construction precisely constructs the pavement width and linearity according to the surrounding facilities or planting lines, and provides smooth drainage such as rainwater during rainy weather. It should be finished by paying attention to the inclination etc.

Next, the surface is cured pavement surface, the curing is covered with a plastic sheet to prevent moisture evaporation to wet curing, limiting the walking or movement of the vehicle before curing and drying, temperature change, load It shall be protected against external influences such as shocks and shocks. In addition, a curing agent may be used if necessary, and the use thereof is not limited.

According to the paving method of the present invention as described above, it is possible to provide an economical and environmentally friendly road paving method with excellent comfort in terms of texture, recycling is possible, and excellent durability and water retention of the pavement.

Hereinafter, the configuration and operation of the present invention through examples and comparative examples in more detail as follows, the present invention is not limited by the following examples.

(Example 1)

38.7% by weight of soil, 58.0% by weight of heavy refractory aggregate, 3.0% by weight of magnesium-based solidified material and 0.3% by weight of polymer admixture, wherein water has an optimum water content (OMC) of 10-16% The composition and package which were mixed as much as possible were manufactured.

Here, as the soil, 5mm or less Masato was used as the 75㎛ sieve passage rate of 8%, waste refractory coarse aggregate was used as alumina refractory material of the aggregate particle size range 5 ~ 2.5mm, the magnesium-based solidified material is Magnesia was prepared by mixing 60% by weight of blast furnace slag and 7% by weight of magnesium sulfate, and a polymer admixture was used as a styrene butadiene rubber (SBR) emulsion.

(Example 2)

37.9% by weight of soil, 56.8% by weight of heavy refractory aggregate, 5.0% by weight of magnesium-based solidified material and 0.3% by weight of polymer admixture, wherein water has an optimum water content (OMC) of 10-16% in the soil packaging composition. The composition and package which were mixed as much as possible were manufactured.

The same soil as in Example 1 was used for the soil, waste refractory coarse aggregate, magnesium-based solidifying material, and polymer admixture.

(Example 3)

35.7% by weight of soil, 54.0% by weight of heavy refractory aggregate, 10.0% by weight of magnesium-based solidified material and 0.3% by weight of polymer admixture, wherein water has an optimum water content (OMC) of 10-16% The composition and package which were mixed as much as possible were manufactured.

The same soil as in Example 1 was used for the soil, waste refractory coarse aggregate, magnesium-based solidifying material, and polymer admixture.

(Example 4)

38.0% by weight of soil, 57.0% of waste refractory coarse aggregate, and 5.0% by weight of magnesium-based solidified material were mixed, and water was mixed with the composition and package so that the optimum water content (OMC) of the soil packaging composition was in the range of 10 to 16%. Prepared.

The same soil as in Example 1 was used for the soil, waste refractory coarse aggregate, magnesium-based solidifying material, and polymer admixture.

(Comparative Example 1)-Soil Packaging Composition Using Cement System Solidified Material

84.0% by weight of soil, 15.5% by weight of cement solidified material, and 0.5% of polymer admixture were mixed, and water and a composition and a package were prepared to be mixed so as to have an optimum function ratio of 10 to 16%.

As the soil and polymer admixture, the same one as in Example 1 was used, and portland cement was usually used as the cement solidifying material.

(Comparative Example 2)-Soil Packaging Composition Using Resin-Based Solid Material

The composition and package which mixed 89.0 weight% of soil, 10.0 weight% of epoxy resin, and 1.0 weight% of hardening | curing agents were manufactured.

The same soil as in Example 1 was used.

(Comparative Example 3)-General density asphalt pavement mixture

94.0% by weight of the mixed aggregate having a maximum dimension of 13 mm and 6.0% by weight of asphalt, followed by heating with stability (N) of 6,000, flow value (1/100 cm) of 30, porosity (%) of 5, and saturation (%) of 75 Asphalt mixtures and pavements were prepared.

The ratio of the main material and the binder of Examples 1 to 4 and Comparative Examples 1 to 3 is shown in Table 3 below.

The ratio of the main material and the binder of Examples 1 to 4 and Comparative Examples 1 to 3 division Main material Binder Earth (masato) aggregate Crushed Refractories Fire Polymer Example 1 38.7% - 58.0% 3% 0.3% Example 2 37.9% - 56.8% 5% 0.3% Example 3 35.7% - 54.0% 10% 0.3% Example 4 38.0% - 57.0% 5% 0.0% Comparative Example 1
(Cement soil packing) 84.0% - - 15.5%
(cement) 0.5% Comparative Example 2
(Resin dirt packing) 89.0% - - 10.0%
(Epoxy) 1.0% Comparative Example 3
Asphalt packing 94.0% - 6.0%
(asphalt) -

Hereinafter, in order to more easily understand the characteristics of Examples 1 to 4 according to the present invention, the experimental results comparing the characteristics and effects of the Examples and Comparative Examples according to the present invention are shown.

First, a test related to the environmental evaluation of the soil packaging composition was carried out. The test relating to the environmental evaluation did not perform Example 1.

Test Example  One : PH  Evaluation (hydrogen ion concentration)

As part of the environmental evaluation of the soil packaging composition was tested for pH measurement, the measurement was used a hydrogen ion concentration meter and the measurement results are shown in Table 4 below.

Test Example  2: hexavalent chromium elution evaluation

Heavy metal (hexavalent chromium) dissolution test was carried out as part of the evaluation of the elution of harmful substances in soil packaging composition, the measurement results are shown in Table 4 below.

Test Example  3: conservative evaluation

By measuring the water retention of the soil pavement composition, the water retention was measured in order to evaluate the effect of suppressing the increase in the packaging temperature of the package according to the degree of water retention. The water retention was measured by making 10 * 10 * 5 ㎝ specimens for each soil pavement composition, curing them for 7 days, immersing them in a water bath for 24 hours, and saturating them. The measurement results are shown in Table 4 below.

% Retention = (A-C) / C × 100

A: Surface dry saturation weight

C: dry weight

Test Example  4 road surface temperature Abatement  Test evaluation

In order to evaluate the effect of reducing the temperature of the soil pavement composition and the package, an indoor irradiation test was conducted, and the core specimens collected from the specimens of Examples and Comparative Examples were measured under the same conditions as the specimens of Comparative Example 3 (density asphalt pavement). And the temperature reduction amount was calculated from the difference with the asphalt specimen temperature of Comparative Example 3, the measurement results are shown in Table 4 below.

Environmental evaluation test result division PH measurement test Hexavalent Chromium Dissolution Test Conservability (%) test Temperature Reduction Test (℃) Example 2 7.5 Not detected 16.5 19.2
(37.8) Example 3 - - - 20.3
(36.7) Example 4 7.3 - 15.7 - Comparative Example 1 12.5 1.38 mg / l 7.3 12.1
(44.9) Comparative Example 2 - - 6.1 13.2
(43.8) Comparative Example 3 - - - 0.0
(57.0)

※ Figures in () are measured temperature

The environmental (hazardous) evaluation test result of Table 4 is a result of comparing and testing the soil packaging composition (example) using the magnesium-based solidifying material of the present invention and the conventional soil packaging composition (comparative example).

As can be seen from the PH measurement test results of Table 4, the pH measurement results of Examples 2 and 4 of the soil packaging composition using the magnesium-based solidified material of the present invention is 7.3 to 7.5 as compared to the neutral, The measurement result of the comparative example 1 of the soil packaging composition using the cement solidified material of 12.5 showed strong alkali property, and it turns out that it is excellent in the ecological friendliness of the soil packaging composition using the magnesium-based solidified material of this invention.

In addition, as can be seen in the hexavalent chromium elution test results of Table 4, in Example 2 of the soil packaging composition using the magnesium-based solidifying material of the present invention, while hexavalent chromium, which is a harmful heavy metal substance, was not detected, In Comparative Example 1 of the soil packaging composition using the cement-based solidifying material, 1.38 mg / l of harmful substances were detected, and it can be seen that the soil packaging composition using the magnesium-based solidifying material of the present invention has excellent environmental friendliness.

In addition, as can be seen from the water retention test results of Table 4, the conventional cement-based solidified material of the water retention test results of Examples 2 and 4 of the soil packaging composition using the magnesium-based solidified material of the present invention is 15.7 ~ 16.5 And more than doubled from 6.1 to 7.3 of Comparative Example 1 and Comparative Example 2 of the soil packaging composition using the resin-based solidified material, which is a waste aggregate of high refractory coarse aggregate with a certain portion of soil, which is the main material of the present invention. It turns out that the water retention property of the composition by using by substituting for is improved.

In addition, as can be seen from the result of measuring the temperature reduction in Table 4, in the case of the soil packaging composition and the package using the magnesium-based solidifying material of the present invention, a temperature reduction effect of 19.2 to 20.3 ° C was observed, In the case of Comparative Examples 1 and 2, which are the soil packaging composition and the packaging body using the resin-based solidifying material, the temperature reduction effect of 12.1 to 13.2 ° C is shown, and the environmental friendliness of the soil packaging using the magnesium-based solidifying material of the present invention It can be seen that compared to the improvement. In addition, the improvement of the temperature reduction effect was found to improve the water retention effect by improving the water retention of the composition by replacing a certain portion of the earth, which is the main material of the present invention with a thick waste aggregate having high water retention.

Next, a test related to the durability evaluation of the soil packaging composition and the package was performed, and the outline and evaluation results of the test for each evaluation item are as follows.

Test Example  5 Indirect tensile strength  evaluation

Indirect tensile strength was measured to evaluate the durability of the soil pavement composition. The soil pavement composition measured the indirect tensile strength because of durability problems such as surface wear and clay, and roughening the surface by the East Sea, the measurement results are shown in Table 5.

Test Example  6 Freeze thaw resistance evaluation

In order to evaluate the freeze thaw resistance of the soil pavement composition, an accelerated weather resistance test (freeze thaw temperature: minus 15 ° C. to 5 ° C., freeze thaw cycle: 10 cycles, 16 hours freeze, 8 hours thaw) was performed. Table 5 shows.

Test Example  7 Elasticity Assessment

In order to evaluate the ductility of the soil pavement mixture and package, the elasticity was measured by the coefficient of rebound by GOLF BALLI for 7 days curing specimens. The results are shown in Table 5.

Durability evaluation test result division Indirect tensile strength
(7 days, MPa) Freeze thaw resistance
(Crack occurs) Elasticity
(Coefficient of rebound) Example 1 0.78 No cracks - Example 2 0.87 No cracks 22 Example 3 0.81 No cracks - Example 4 0.62 - - Comparative Example 1 0.65 Some cracks occur 39 Comparative Example 2 0.32 Multiple cracks 20

As can be seen from the indirect tensile strength test results of Table 5, the indirect tensile strength of the soil packaging composition using the magnesium-based solidifying material of the present invention, 0.78 ~ 0.87 except for Example 4, which does not use a polymer admixture As MPa, the strength was greatly improved as compared with 0.65 MPa of the conventional cement-based soil packaging composition and 0.32 MPa of the resin-based soil packaging composition, thereby improving the wear resistance and durability of the package. In addition, in the case of the soil packaging composition using the magnesium-based solidifying material of the present invention, the indirect tensile strength of Example 4 without using the polymer admixture is 0.62, compared with Examples 1, 2, and 3 using the polymer admixture. It shows a significant decrease, indicating that the use effect of the polymer admixture is very large.

In addition, as can be seen from the freeze-thaw test results of Table 5, in the embodiment of the soil packaging composition using the magnesium-based solidifying material of the present invention, cracks due to freeze-thawing did not occur at all, whereas conventional cement-based and resin-based It was found that some and many cracks occurred in the soil packaging composition, which was attributed to the effects of the polymer admixture used for improving weather resistance and the waste refractory coarse aggregate used for improving durability as the binder of the present invention.

In addition, as can be seen in the elasticity measurement results of Table 5, the elastic resilience coefficient of the soil packaging composition using the magnesium-based solidified material of the present invention is 22, the elastic resilience coefficient 20 and Comparative Example 2 of the resin-based soil packaging composition While similar ductility was shown, the elastic resilience coefficient of Comparative Example 1, which is a cement soil packing composition, was found to be high as 39, indicating the stiffness of cement soil packing.

As described above through the preferred embodiment of the present invention, the present invention is not limited to the above embodiment, and various modifications can be made by those skilled in the art within the technical scope of the present invention. to be.

Claims (9)

In the soil packaging composition comprising a main material and a binder containing soil,
The main material is made of earth and waste refractory coarse aggregate,
Said binder is a soil packaging composition using a magnesium-based solidified material, characterized in that it comprises a magnesium-based solidified material. The method of claim 1,
The binder is an earth packaging composition using a magnesium-based solidifying material, characterized in that further comprises a polymer admixture. The method of claim 2,
The polymer admixture is a soil packaging composition using a magnesium-based solidifying material, characterized in that the styrene butadiene rubber (SBR) emulsion. The method of claim 2,
The soil packaging composition,
Soil packaging using magnesium-based solids, characterized in that it comprises 29.5 to 43% by weight of soil, 53 to 60% by weight of coarse aggregate of waste, 3 to 10% by weight of magnesium-based solidified material, and 0.15 to 0.5% by weight of polymer admixture Composition. The method of claim 1,
The magnesium-based solidified material is a soil packaging composition using a magnesium-based solidified material, characterized in that 50 to 75% by weight of magnesia, 20 to 40% by weight of blast furnace slag and 5 to 10% by weight of magnesium sulfate. The method of claim 1, wherein
The waste refractory coarse aggregate is a soil packaging composition using a magnesium-based solidifying material, characterized in that the mixture of one or two of alumina refractory and clay refractory. 7. The method according to any one of claims 1 to 6,
The soil packaging composition further comprises water,
The soil packaging composition using a magnesium-based solidified material, characterized in that the water is mixed so as to be in the range of 10 to 16% of the optimum water content (OMC) of the soil packaging composition. 8. The method of claim 7,
Soil packaging composition using a magnesium-based solidified material, characterized in that the 7-day curing indirect tensile strength of the soil packaging composition containing the water is 0.5 ~ 1.0MPa. In the road paving method using the soil paving composition,
Transporting the soil packing composition using the magnesium-based solidified material of claim 7 to a municipal factory;
Laying and voltage conveying the earthen packaging composition;
Finishing the paving and charged packaging surface with the earth packaging composition;
Soil paving construction method using a magnesium-based solidified material, characterized in that comprising the step of curing the pavement surface is finished surface.

Images