KR101121167B1 - Non-shrink with concrete pavement - Google Patents

Abstract

PURPOSE: A road pavement method using a non-shrink concrete composition including soil is provided to simplify the construction process and enhance durability against acids and alkalis by maintaining maturing age. CONSTITUTION: A road pavement method using non-shrink concrete composition including soil comprises the following steps: preparing a non-shrink concrete composition(s10); transferring the non-shrink concrete to a transportable plant for allocation(s20); preparing a paving material by mixing the transported non-shrink concrete composition(s30); installing the paving material on a basic floor of the road(s50); hardening the installed paving material by a driven roller or a compactor(s70); and curing the hardened paving material(s80). The non-shrink concrete composition comprises 82-90 weight% of soil and 10-18 weight% of binder composition. The binding agent composition comprises 94-98 weight% of firming agent and 2-6 weight% of soil stabilizer. The firming agent comprises 15-35 weight% of clinker powder, 10-30 weight% of an alumina type cement structure compound(C12A7:12CaO7Al2O3), 5-35 weight% of blast furnace slag micro powder, 5-15 weight% of bentonite, 10-20 weight% of fly ash, 5-25 weight% of zeolite, and 15-35 weight% of anhydrous gypsum.

Description

Road paving method using non-shrinkable concrete composition containing earth and sand {non-shrink with concrete pavement}

The present invention relates to a road paving method using a non-contraction concrete composition containing earth and sand.

In particular, the earth and sand can be kept intact by including solidifying agent (CSA plastic compound) and water-soluble soil stabilizer. So, the construction cost can be reduced because no joint work is required due to the elasticity and ductility of the soil stabilizer. It relates to a road pavement method using a non-condensed concrete composition containing a soil.

Soil paving method has been studied a number of methods, but now about four methods have been disclosed.

Firstly, there is a masato packing method which is performed by pressing ordinary masato with a roller or the like. In this method of packing, cement is mixed with water by putting about 15% by weight of masato in a weight ratio.

Secondly, it is called Soil Concrete, has high defect rate, is weak against freeze-thawing, inexpensive, easy to install, and puts a little about 10% of soil into general concrete, and mixes solid materials made of cement with Masato and mixes them together by hand. There is a construction method that puts water as much as quality and compacts and installs.

In addition, by applying magnesium sulfate or magnesium chloride solution and compacting the roller voltage, it is less dusty than ordinary dirt roads, and the amount of loss is reduced. There is a chemical compaction package mainly used for sports grounds and walks.

In addition, there is a method of diluting and applying a polymer polymer in water and compacting the voltage. Such a method has a problem in that the packing is made using the binding property of the aqueous polymer and does not squeeze even when it is rained, but the water permeability is small.

In addition to these methods, various methods and compositions have been proposed.

For example, Korean Patent Publication No. 2001-11910 mentions a technique of improving the strength of side and pavement surfaces by using ESC hardener per 1 m ^{3 of} soil, and using soil with low moisture content and low organic matter.

Korean Patent Application No. 2005-130224 proposes a method of expressing the surface texture of soil as it is using cement, slag, gypsum, CSA, fly ash and ocher powder.

Korean Patent Laid-Open No. 2005-105153 proposes a composition which possesses properties of soil such as far-infrared emission and repair, breathability, including clinker powder, cement, blast furnace slag fine powder, anhydrous gypsum, strength accelerator and coagulation retardant Doing.

These packaging materials and methods use binders such as lime and cement in the soil and additives that are chemical materials. Therefore, hexavalent chromium (Cr ^{6 +} ) is generated after packaging, resulting in unsanitary and expensive cement content. have.

In the case of pavement construction method using soil in Korea, there is a problem of losing function as a packaging agent over time because freeze-thawing occurs and cracks occur because of spring and winter. In addition, there are four seasons in Korea, so the wet and dry is repeated, there is a problem that the surface of the packaging is lost, thereby reducing the performance of the packaging.

In addition, since the soil pavement is installed on the auxiliary base or base layer, cracks are generated due to temperature change and wet and dry repetition, and joints are installed to control the cracks.

1 is a three-dimensional cross-sectional view showing a state in which the conventional soil pavement construction.

Referring to FIG. 1, a base layer 2 and an auxiliary base layer 3 are installed on a hearth 1, a separation layer 4 is provided on the top thereof, and a soil pavement 5 having joints 10 is constructed. do.

However, the joint 10 has a problem that not only the running performance of the vehicle is lowered, but also the joint part installed is easily damaged, thereby impairing the function of the pavement.

The present invention has been proposed to solve the above-mentioned conventional problems, the main object of the present invention, the shrinkage, expansion of the packaging material by the elasticity and ductility of the soil stabilizer to suppress the joint work can be omitted joint work It is to provide a composition.

Another object of the present invention is to provide a non-shrinkable concrete composition that can maintain the soil color as it is, including a solidifying agent (CSA calcined compound) and a water-soluble soil stabilizer in the soil.

Still another object of the present invention is to provide a road paving method using the above-mentioned non-contraction concrete composition.

Still another object of the present invention is to provide an apparatus for mixing non-condensed concrete composition for mixing the above-mentioned non-condensed concrete composition.

The non-shrink concrete composition of the present invention for achieving the above object,

It includes 82 to 90% by weight of soil sand and 10 to 18% by weight of the binder composition, wherein the binder composition comprises 94 to 98% by weight of the solidifying agent and 2 to 6% by weight of the soil stabilizer.

In addition, the solidifying agent of the non-condensed concrete composition according to the present invention, 15 to 35% by weight of clinker powder, 10 to 30% by weight of alumina-based cement structure compound (C12A7: 12CaO ₇ Al ₂ O ₃ ), blast furnace slag fine powder 5 ~ 35 wt%, bentonite 5-15 wt%, fly ash 10-20 wt%, zeolite 5-25 wt% and anhydrous gypsum 15-35 wt%.

In addition, the soil stabilizer of the non-condensed concrete composition according to the present invention, 12 to 16% by weight of methyl methacrylate, 14 to 22% by weight of butyl acrylate, 13 to 16% by weight of 2-ethylhexyl acrylate, methacrylic acid 1 2 wt%, sodium lauryl sulfate 0.03-0.05 wt%, lithium silicate 0.2-3 wt%, alkyl sulfonate 0.1-2 wt%, ammonium persulfate 0.03-0.2 wt% and water 48-53 wt% .

In addition, the mixing device for mixing the non-contraction concrete composition according to the present invention, the first screen for filtering large aggregates contained in natural soil; A first hopper disposed under the first screen to store primary sorted soil filtered out by the first screen; A first conveyor installed at a lower portion of the first hopper and transferring primary sorted soil discharged through a lower outlet of the first hopper; A second screen installed at a lower portion of the first conveyor and configured to filter out small aggregates contained in the primary sorted soil which has been transferred by the first conveyor; A second hopper disposed under the second screen to store secondary sorted soil filtered out by the second screen; A second conveyor installed at a lower portion of the second hopper and transferring secondary sorted soil discharged through a lower outlet of the second hopper; A third hopper installed at a predetermined distance from the second hopper to store the remaining non-condensed concrete composition except for the earth and sand; A third conveyor installed under the third hopper to transfer the remaining non-condensed concrete composition except for the earth and sand discharged through the lower outlet of the third hopper; And a mixer installed between the second conveyor and the third conveyor to mix the non-condensed concrete composition except for the earth and sand, which are transferred by the second and third conveyors.

In addition, the mixer, a mixer barrel; A stirring shaft installed in the center of the mixer barrel; A plurality of stirring blades disposed inside the mixer barrel while being installed on the stirring shaft; And a stirring motor for rotating the stirring shaft, wherein the stirring blade further includes a disc shape having at least one hole formed therein.

In addition, the road paving method of the present invention, the step of preparing the non-condensed concrete composition (S10); Transferring the prepared non-condensed concrete composition to a mobile distribution plant (S20); Preparing the road paving material by mixing the conveyed non-condensed concrete composition by a continuous screw mixer (S30); Primary laying on the base of the road to be paved with road paving material (S50); Compacting the laid road pavement material using an electric roller or a compactor (S70); And curing the road pavement material compacted (S80).

In addition, the road paving method of the present invention, only when the base is inclined, before the step of installing the road paving material on the base of the road (S50), for preventing the separation of material on the base using a tinning machine. Forming the uneven layer (S40) is included.

In addition, the road paving method of the present invention, after the step of first laying the road paving material on the base of the road (S50), the step of re-installing the road paving material on the first laid site (S60) do.

In addition, in the road paving method of the present invention, the step of preparing the road pavement material may include: first sorting the soil of natural soil to pass through the first screen to sort soil of an appropriate size; Storing the primary sorted soil in a first hopper; Transporting the primary sorted soil stored in the first hopper by a first conveyor; A secondary sorting step of sorting fine soils by passing the first sorted soils transported by the first conveyor through a second screen of a smaller mesh than the first screens; It comprises; and mixing the fine earth and sand through the secondary screening process, and the remaining non-condensed concrete composition except for the earth and sand into the mixer.

In the non-condensed concrete composition and road paving method according to the present invention, including the CSA plastic compound and water-soluble soil stabilizer in the soil, while maintaining the soil color as it is, the strength is very high, the joint work by the elasticity and ductility action of the soil stabilizer Since it is not necessary, it has the effect of reducing the construction cost.

In addition, because of the use of natural soil, economical, easy to install, fast, as well as long-term solidification continues to increase in strength, and has a durability against acids, alkalis.

In addition, the natural color of the soil is expressed as it is, and because it absorbs the sun radiation heat, it has excellent natural environmental friendliness, and improves the use of natural resources according to the use of on-site soil, reduced to natural soil after degeneration has the advantages of pollution prevention and environmental conservation. .

In addition, the mixing device of the non-condensed concrete composition according to the present invention can automatically mix the composition in large quantities, regardless of the manpower, it is possible to efficiently produce the composition.

1 is a flowchart illustrating a road paving method according to the present invention.
2 is a flowchart illustrating a step of preparing a road paving material in the road paving method according to the present invention.
3 is a conceptual diagram of a mixing apparatus according to the present invention.
4 is a block diagram of a second screen and a vibrator for vibrating the second screen in the mixing device according to the present invention.

Hereinafter, embodiments according to the present invention are disclosed. In describing the embodiments, the same reference numerals refer to the same configuration, and additional descriptions that may overlap or limit the meaning of the invention may be omitted in describing the embodiments of the present invention.

Prior to the detailed description, the concept of the invention, in spite of the singular form of the present disclosure, in the light of the circumstances in which the singular / plural is not clearly distinguished in the use of Korean and in the ordinary terminology used in the art. It is used in the sense that it includes plural expressions unless otherwise contradictory or clearly different from each other. In addition, the words "include", "have", "include", "comprise", or the like described or described in this specification may indicate in advance the possibility of the presence or addition of one or more other features or components, or a combination thereof. It should be understood that it does not exclude.

In addition, in the present invention, 'composition' is a term that includes the meaning of the original mixture and the compound, in the present invention 'composition' of the 'binder composition' is a 'mixture', unless otherwise stated or contrary to the overall content of the invention It is used to mean '.

The present invention is a non-shrink concrete composition and a road paving method using the same. Here, it is assumed that the non-shrinkage means that there is no shrinkage, but also the meaning of low shrinkage that the shrinkage is small.

First, the non-contraction concrete composition will be described.

Non-condensed concrete compositions (hereinafter referred to as "concrete compositions") according to the present invention include earth and binder compositions.

The composition ratio of the concrete composition is preferably 82 to 90% by weight of soil sand and 10 to 18% by weight of the binder composition.

In the concrete composition, earth and sand refers to earth and sand collected from nature. Among the soil, the adhesive soil serves to preserve the adhesion permanently and to have the adhesion in the sandy soil without adhesion. This ensures stability against water or freezing.

In the concrete composition, the binder composition includes a hardener and a soil stabilizer.

The composition ratio of the binder composition is preferably 94 to 98% by weight of the solidifying agent and 2 to 6% by weight of the soil stabilizer.

One of the binder compositions, the hardener, is directly related to strength because it serves to enhance the bonding strength and the mechanical strength of the concrete composition. Therefore, it occupies most of the binder composition (94 to 98% by weight). Less than 94% by weight of the binder composition results in a drop in bond strength and mechanical strength, and in excess of 98% by weight results in a problem in that the strength is increased more than necessary and unnecessary costs are added.

The above-mentioned solidifying agent includes clinker powder, alumina cement structural compound, blast furnace slag fine powder, bentonite, fly ash, zeolite and anhydrous gypsum.

The composition ratio of the solidifying agent is 15 to 35% by weight of clinker powder, 10 to 30% by weight of alumina cement structural compound, 5 to 35% by weight of blast furnace slag powder, 5 to 15% by weight of bentonite, 10 to 20% by weight of fly ash, Zeolite 5-25 wt% and anhydrous gypsum 15-35 wt%.

In the said solidifying agent composition, clinker powder refers to the lump which a part of component melt | dissolved and the whole formed from the block sintered compact, and is also called a lump. In general, the raw material is a fine mixture of calcite raw material and clay raw material in an appropriate ratio, and then pulverized by rotary kiln or the like until a part of the raw material is melted. In the present invention, the compressive strength and mechanical strength are affected, and if the content is less than 15% by weight, the compressive strength and mechanical strength are insignificant.

Among the solidifying agent components, the alumina cement structure compound (C12A7: 12CaO ₇ Al ₂ O ₃ ), affects the bonding strength and strength, the curing rate, and when added to less than 10% by weight, sufficient bonding strength and strength is smoothly achieved. Hardening speed is long. In addition, if the content exceeds 30% by weight, the bonding strength and strength are enhanced, but the curing speed is not fast enough to secure a normal working time.

Among the components of the solidifying agent, the blast furnace slag powder is produced together with pig iron in the smelting furnace, its specific gravity is in the range of 2.88 ~ 2.95 and the specific surface area of 6,000 ± 500㎠ / g, the CaO component of the blast furnace slag powder is 40 ~ 45 weight Since the alkalinity is low around about%, it is effective in reducing the pH. For this purpose, 5 to 35% by weight is appropriate.

Bentonite in the solidifying agent component is intended to improve workability by preventing material separation, providing lubricity and cohesiveness, and when added in an amount less than 5% by weight, the cohesion of the packaging material is lowered. .

Among the solidifying agent, fly ash affects the strength enhancement, and when added to less than 10% by weight, sufficient reaction does not occur, so that the effective strength cannot be obtained, and when the content exceeds 20% by weight, the strength is rapidly decreased. .

Zeolite is a porous crystal made of silicon (Si) and aluminum (Al), and is used as a catalyst for various petrochemical reactions, and contributes to strength enhancement by reacting with calcium hydroxide and pozzolane. If it is added less than 5% by weight is sufficient strength expression is weak, if it exceeds 35% by weight it is effective to be added within the above range because the strength is strengthened more than necessary.

Among the hardener components, anhydrous gypsum affects the stimulant and strength enhancement of the slag and the curing rate. When the anhydrous gypsum is added in less than 15% by weight, the irritation effect of the slag may be lowered and thus the strength may be affected, and the smooth gypsum may not be formed. On the other hand, if it exceeds 35% by weight, strength enhancing effect can be obtained, but normal working time cannot be secured due to fast curing speed. In addition, soils containing organic materials are usually unsuitable for packaging purposes when treated only with Portland cement, and the aggregate size of the aggregate is generally about 50 mm in size.

The (water-soluble) soil stabilizer, which is another of the binder compositions, aggregates to form a continuous film film as water evaporates after packaging, and is attached to soil particles at the same time, and voids present in the package are filled by stabilizer particles. As a function of promoting adhesion and adhesion while forming a monolithic structure with soil particles, 2 to 6% by weight of the binder composition is blended. When less than 2% by weight, the film film is weakly formed so that the soil particles may be crushed, the surface peeling may occur, if it exceeds 6% by weight can be obtained high strength and high durability, but there is a problem that a lot of cost.

The physical properties of the soil stabilizer is as follows.

Name Properties color milk white importance 1.04 ± 0.05 Viscosity 600 cps pH 8.0 ± 9 Solid content 47 ± 1% Vapor pressure Same as water

On the other hand, the soil stabilizer, methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid, sodium lauryl sulfate, lithium silicate, alkyl sulfonate, ammonium persulfate and water.

The composition ratio of the soil stabilizer composition is 12 to 16% by weight of methyl methacrylate, 14 to 22% by weight of butyl acrylate, 13 to 16% by weight of 2-ethylhexyl acrylate, 1 to 2% by weight of methacrylic acid, sodium lauryl sulfate 0.03 to 0.05 weight%, lithium silicate 0.2 to 3 weight%, alkyl sulfonate 0.1 to 2 weight%, ammonium persulfate 0.03 to 0.2 weight% and water 48 to 53 weight%.

Of the soil stabilizer components, methyl methacrylate (methylmethacrylate) is a main component for imparting stability and weather resistance of the soil stabilizer, when less than 12% by weight, the stability and weather resistance is lowered, the film formation during the curing is not smooth, 16 When the weight percentage is exceeded, adhesiveness is so strong that workability is not easy.

Among the soil stabilizer components, butyl acrylate (buthylacrylate) is the main component for imparting the hardenability to the soil stabilizer, when less than 14% by weight has a closed stage late hardening, when it exceeds 22% by weight hardening is too fast Difficult to secure

Among the soil stabilizer components, 2-ethylhexylacrylate is a main component for imparting sclerosis to the soil stabilizer. When it is less than 13% by weight, the curing is slow, and when it exceeds 16% by weight, the curing rate is fast. It is difficult to secure working time.

Among the soil stabilizer components, methacrylic acid is excellent in weatherability, which is a property to withstand weather and weather such as sunlight, inhibits corrosion due to external environmental changes (weather and climate change), and simultaneously penetrates into the package to integrate. As a minor ingredient added to improve adhesion strength and toughness and to improve colorability by pigments, the amount is less than 1% by weight, and it is insignificant to exert the functions listed above. The function is enhanced but the cost is increased.

Among the soil stabilizer components, sodium lauryl sulfate serves to prevent cracks by absorbing the expansion pressure into the open bubble to suppress the shrinkage of the package. If the viscosity is less than 0.03% by weight, the soil stabilizer is highly viscous and sticky, so the efficiency of the work decreases. If the content exceeds 0.05% by weight, the viscosity is low, but the unit price is increased, which is inefficient.

Among the soil stabilizer components, lithium silicate serves to prevent shock phenomenon of the soil stabilizer mixture. If the amount is less than 0.2% by weight, the shocking phenomenon cannot be prevented. If the content exceeds 3% by weight, the shocking phenomenon is prevented, but the unit price increases.

Among the soil stabilizer components, the alkyl sulfonate acts to reduce the surface tension of the soil particles and to improve the admixture of the soil particles of the clay or the sandy soil as substances which penetrate, disperse, and bubble the soil particles. If it is less than 0.1% by weight, the dispersibility of the soil mixture is poor, and it is difficult to obtain an even mixture. If it exceeds 2% by weight, the dispersibility of the mixture is improved, but the unit price is increased.

Among the soil stabilizer components, ammonium persulfate ((NH4) 2S2O8) undergoes an initiation reaction, and then a growth reaction and a termination reaction occur to generate an acrylic polymer as a polymer. Play a role. In order to produce a degree of acrylic polymer, the present ammonium persulfate is preferably blended within the range of 0.03 to 0.2% by weight.

Of the soil stabilizer components, water is a component necessary for smooth mixing of the soil stabilizer. If the water is less than 48% by weight, the mixing is poor, if the water is more than 53% by weight, the mixing is good, but the stickiness of the stabilizer is severe, poor workability.

A binder composition was prepared as follows.

(1) Preparation of Solidifying Agent ingredient Weight (g) Clinker powder 17 Alumina Cement Structure Compound (C12A7: 12CaO ₇ Al ₂ O ₃ ) 15 Blast furnace slag powder 11 Bentonite 9 Fly ash 13 Zeolite 14 Anhydrous gypsum 21 Solidifying agent (total) 100

(2) Preparation of Soil Stabilizer ingredient Weight (g) Methyl methacrylate 13 Butyl acrylate 19 2-ethylhexyl acrylate 15 Methacrylic acid 1.5 Sodium Lauryl Sulfate 0.04 Lithium silicate 1.92 Alkyl sulfonate 0.5 Sodium persulfate 0.05 water 49 Soil Stabilizer (Total) 100

The binder 100g was prepared by mixing 96g of the solidifying agent and 4g of the soil stabilizer prepared as described above. In the following examples will be described an embodiment of the non-contraction concrete composition for road paving using the binder composition. However, the present invention is not limited by these examples.

[Example]

First, the non-concrete concrete composition for road paving prepared was prepared by mixing 85 g of soil sand and 15 g of a binder composition. The composition thus prepared was sprayed using a finisher while spraying water on the compacted road and then compacted using a vibrating roller.

Comparative Example 1

The non-condensing concrete composition for road paving was prepared by mixing 30 g of the binder composition prepared by mixing 70 g of soil sand and a hardener and a soil stabilizer prepared as shown in the following table in the same mixing ratio. Same as the following example.

ingredient Weight (g) Clinker powder 11 Alumina Cement Structure Compound (C12A7: 12CaO ₇ Al ₂ O ₃ ) 35 Blast furnace slag powder 4 Bentonite 16 Fly ash 25 Zeolite 3 Anhydrous gypsum 6 Solidifying agent (total) 100

Comparative Example 2

The non-condensed concrete composition for road paving was prepared by mixing 75 g of soil sand and 25 g of the binder composition applied to the examples. Same as the following example.

In order to measure the strength of the mixed mixture as described above to prepare a specimen in a mold having a certain shape, and curing for 28 days at a temperature of 22 ± 1 ℃, humidity of 80 ± 10%, and then the strength of the test with a universal testing machine As a result of the measurement, the experimental example was confirmed to be superior to the comparative example as shown in Table 1 below.

Compressive and flexural strength Compressive strength (kgf / cm ² )
Flexural strength (kgf / cm ² ) 3 days 7 days 28 days 3 days 7 days 28 days Example 71 138 168 32.8 40.7 53.2 Comparative Example 1 43 98 144 22.9 26.6 41.4 Comparative Example 2 50 112 150 25.4 30.1 44.5

As shown in Table 5, it can be seen that the compressive strength and flexural strength of the non-condensing concrete composition for road paving according to the present invention is superior to the non-condensing concrete composition for road paving prepared by Comparative Examples 1 and 2.

In view of these results, roads constructed with non-concrete concrete compositions for road paving according to the present invention are constructed in a state in which the soil color is very high and the soil colors are intact, and the construction cost is omitted by omitting joint work by suppressing shrinkage and expansion. This is greatly reduced.

Next, a road paving method using the above-mentioned non-contraction concrete composition will be described.

Step 1 is to prepare the non-contraction concrete composition ( S10 ).

That is, the first stage is 82 to 90% by weight of soil sand; Clinker powder, alumina cement structural compound, blast furnace slag fine powder, bentonite, fly ash, zeolite, anhydrous gypsum; And a soil stabilizer composed of methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, methacrylic acid, sodium lauryl sulfate, lithium silicate, alkyl sulfonate, ammonium persulfate, and water; It is a step of preparing a non-contraction concrete composition consisting of.

Here, as described above, but again described, the solidifying agent is 15 to 35% by weight of clinker powder, 10 to 30% by weight of alumina-based cement structure compound, 5 to 35% by weight of blast furnace slag powder, 5 to 15% by weight of bentonite %, Fly ash 10-20% by weight, zeolite 5-25% by weight and anhydrous gypsum 15-35% by weight.

The soil stabilizer is 12 to 16% by weight of methyl methacrylate, 14 to 22% by weight of butyl acrylate, 13 to 16% by weight of 2-ethylhexyl acrylate, 1 to 2% by weight of methacrylic acid, sodium lauryl sulfate 0.03 to 0.05 Wt%, lithium silicate 0.2-3 wt%, alkylsulfonate 0.1-2 wt%, ammonium persulfate 0.03-0.2 wt% and water 48-53 wt%.

Step 2 is to transfer the prepared non-condensed concrete composition ( S20 ).

That is, the second step is a step of loading the non-contraction concrete composition from a certain position in a mobile distribution plant to a continuous screw mixer, which will be described later.

The third step is to mix the non-contraction concrete composition ( S30 ).

That is, step 3 is a step in which the non-condensed concrete composition transferred by the mobile dispatching plant is added to the continuous mixer, and the mixer is operated to mix the raw materials of the composition. After the mixing process, the road paving material using the non-contraction concrete composition is made.

At this time, the amount of the non-shrink concrete composition that phase difference to the mobile dispatcher plant, solidifying agent ³ 2.82m, 3.96m ³ soil, water 1.762ℓ, is about 300ℓ soil stabilizers, non-shrink concrete composition which has been thus transferred is per soil 1,700kg, A road paver is finally made by mixing 220 kg of hardener, 30 kg of soil stabilizer, and 120 kg of water.

On the other hand, the mixing process follows the following procedure. However, since the configuration of the mixing apparatus described in the mixing process below will be described later, the description will focus on the process description (see FIG. 2).

First, natural earth is passed through the first screen (detailed configuration will be described later), and the primary screening is performed to sort soil of the appropriate size (S300).

If you go through this process, you can get soil with large aggregates removed from natural soil.

Next, the first screened sediment is stored in the first hopper (S310).

That is, the earth and sand with large aggregates filtered through the first screen is stored in the first hopper.

Next, the primary sorted soil stored in the first hopper is transferred by the first conveyor (S320).

That is, when the first sorted soil is discharged through the discharge hole provided in the lower part of the first hopper, the discharged soil is dropped to the first conveyor, the dropped soil is supplied to the second screen to be described later in accordance with the operation of the first conveyor. .

Next, the finely sorted soil is secondarily sorted by passing the first sorted soil which has been transported by the first conveyor through a second screen having a smaller mesh than the first screen (S330).

That is, since the second screen has a smaller mesh than the first screen, when the first screened soil passes through the second screen, fine soils from which small aggregates included in the first screened soil may be removed may be obtained.

Next, the fine earth and sand undergoing the second screening process, and the remaining non-condensed concrete composition except for the earth and sand are added to the mixer and mixed (S340).

The non-shrinkage concrete composition required in step 3 is made by mixing the finer soil and the remaining non-shrinkage concrete composition in a mixer through the secondary screening process.

Step 4, if the base to be paved is inclined, Uneven layer  Forming S40 ).

That is, only when the slope of the paved road is severe, by using a tiening machine to form an uneven layer on the base surface of the road to be paved to prevent the material separation by sliding.

Since this step is performed only when the inclination of the road is severe, step 4 may be omitted when the road is flat.

Step 5 is the first step of laying the road paving material on the base of the road to be paved ( S50 ).

Step 6 is the primary Underground layer  Ash on top Laying layers  It is a re-establishment phase to form ( S60 ).

In other words, in the sixth step, in order to compensate for the incomplete first laying, the second laying is re-installed. The second laying is an optional step. If the first laying is completed, the second laying must be performed. There is no need to do it. Here, the primary laying thickness and the secondary laying thickness are the same.

Step 7 is a step of compacting the first or second road paving material ( S70 ).

That is, the seventh step is a step of compacting using an electric roller or a compactor (a machine that can withstand heavier loads by compacting, vibrating, or impacting paving material on a ground or road).

Step 8 is curing the road pavement ( S80 ).

That is, the eighth step is to cure the road pavement material after the compaction is completed, and the curing may be either natural curing or forced curing, but the curing temperature at the time of forced curing is 25 to 80 ° C., and is sold on the market in the summer. The surface layer may be covered using a curing cloth or vinyl, and curing may be performed using steam or a hot air blower. More preferably, drying mats (roller-type, far-infrared heating film for sale) sold by Century Century, Inc. Fever) can be kept warm for at least 4 hours at 60 ℃ to enable walking after 1 day.

Hereinafter, with reference to FIG. 3, a mixing device for mixing the non-contraction concrete composition will be described.

The mixing device according to the present invention has a first screen 10 for filtering large aggregates contained in natural soils. Here, the first screen 10 is preferably inclined at a predetermined angle so that the large aggregate filtered on the first screen naturally fall as shown in FIG.

In addition, the mixing apparatus has a first hopper 20 disposed below the first screen 10 to store the primary sorted soil filtered out by the first screen 10. Here, the first detection sensor 21 for detecting whether the contents are stored in the first hopper 20 is installed.

In addition, the mixing device has a first conveyor (30) installed in the lower portion of the first hopper 20 for conveying the primary sorted soil discharged through the lower outlet of the first hopper 20.

In addition, the mixing apparatus has a second screen 40 installed at the lower part of the first conveyor 30 to filter out the small aggregate contained in the primary sorted soil which has been transferred by the first conveyor. Here, the second screen 40 is a mesh smaller than the first screen 10 so as to filter out the small aggregate. In addition, the second screen 40 may also be installed to be inclined at a predetermined angle so that a small aggregate caught like the first screen may naturally fall. However, in the case of a small aggregate in consideration of the inclined angle may not roll down well, as shown in Figure 4, the rotating shaft 41 is rotated by the motor 42 in contact with the lower surface of the second screen 40 And a projection 41a is formed on the outer circumferential surface of the rotary shaft 41 so that the second screen 40 is rattled (vibrated) by the projection 41a according to the rotation of the rotary shaft 41. It can also be applied to the configuration to force the fall off.

In addition, the mixing apparatus has a second hopper 50 disposed below the second screen 40 to store secondary sorted soil filtered out by the second screen. Here, the second detection sensor 51 for detecting whether the contents are stored in the second hopper 50 is installed.

In addition, the mixing apparatus has a second conveyor (60) installed in the lower portion of the second hopper 50 for conveying the secondary sorted soil discharged through the lower outlet of the second hopper.

In addition, the mixing device has a third hopper 70 is installed at a distance away from the second hopper 50 to store the remaining non-condensed concrete composition except the earth and sand. Here, the third detection sensor 71 for detecting whether the contents are stored in the third hopper 70 is installed.

In addition, the mixing device has a third conveyor (80) which is installed in the lower portion of the third hopper 70, and transfers the remaining non-condensed concrete composition except for the earth and sand discharged through the lower outlet of the third hopper.

In addition, a mixer (90) is installed between the second conveyor (60) and the third conveyor (80) to mix the non-condensed concrete composition, except for the soil and the sand, which have been transferred by the second and third conveyors. Has

As shown in FIG. 3, the mixer 90 includes a mixer barrel 91 and a stirring shaft 92 installed at the center of the mixer barrel 91; A plurality of stirring blades (93) disposed inside the mixer barrel (91) while being provided on the stirring shaft (92); And a stirring motor 94 for rotating the stirring shaft 92.

Here, the stirring blade 93 may have a disc shape having at least one hole 93a.

Meanwhile, as described above, the first, second, and third detection sensors 21, 51, and 71 detect whether there is a content in each hopper, and if there is no content, a control panel (not shown) that controls the operation of the mixing device. C), and the control panel stops the mixing device in accordance with the transmitted signal. In other words, if the hopper is operated in the absence of contents, the operation is meaningless, in this case, the mixing apparatus must be forcibly stopped, and this is handled by each sensor and control panel.

Reference numeral 100 is a fourth conveyor for transferring the non-condensed concrete composition, the mixing is completed by the mixer 90 to a predetermined position.

As described above in detail through specific embodiments of the present invention, the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention.

Claims (9)

delete delete delete delete delete 82 to 90% by weight of sand and 10 to 18% by weight of the binder composition, wherein the binder composition comprises 94 to 98% by weight of a hardener and 2 to 6% by weight of a soil stabilizer; The solidifying agent is 15 to 35% by weight of clinker powder, 10 to 30% by weight of alumina-based cement structure compound (C12A7: 12CaO ₇ Al ₂ O ₃ ), blast furnace slag fine powder 5 to 35% by weight, bentonite 5 to 15% by weight, As a road paving method using a non-condensing concrete composition containing 10 to 20% by weight of fly ash, 5 to 25% by weight of zeolite and 15 to 35% by weight of anhydrous gypsum,
Preparing the non-contraction concrete composition (S10);
Transferring the prepared non-condensed concrete composition to a mobile distribution plant (S20);
Preparing the road paving material by mixing the conveyed non-condensed concrete composition by a mixer (S30);
Primary laying on the base of the road to be paved with road paving material (S50);
Compacting the laid road pavement material using an electric roller or a compactor (S70); And
Curing the compacted road pavement (S80);
Road paving method using a non-contraction concrete composition comprising a soil containing a.
The method of claim 6,
Only when the base is inclined, prior to the step of installing the road paving material on the base of the road (S50), the step of forming the uneven layer for preventing material separation on the base using a tinning machine (S40) Road paving method using a non-condensed concrete composition comprising earth and sand, characterized in that the inclusion.
The method of claim 6,
After the step of first laying the road paving material on the base of the road (S50), the non-shrinkage, including earth and sand, characterized in that the step of re-installing the road paving material on the primary laid portion (S60) Road paving method using concrete composition.
According to claim 6, The step of providing the road paving material (S30),
First sorting the natural earth and sand through the first screen and selecting the earth and sand of an appropriate size (S300);
Storing the primary sorted soil in a first hopper (S310);
Transferring the first sorted earth and sand stored in the first hopper by a first conveyor (S320);
A second sorting step (S330) of sorting fine soil by passing the first sorted soil which has been transferred by the first conveyor through a second screen of a smaller mesh than the first screen; And
The method of pavement using the non-condensed concrete composition containing the earth and sand comprising the step of mixing the fine earth and sand, and the non-shrunk concrete composition other than the earth and sand to the mixer (S340).

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