KR100290052B1 - method for manufacturing rolling compactional soil concrete and composition of rolling compactional soil concrete - Google Patents

Abstract

PURPOSE: Provided are a method for producing pressed soil concrete and a pressed soil concrete composition, which prevents scratch of surface and frost damage, and has strength and abrasion resistance, as well as shows natural appearance. CONSTITUTION: The soil concrete composition consists of 500-1000 kg/m¬3 of natural clay or loamy sand, 300-600 kg/m¬2 of admixture for absorbing water, 150-250 kg/m¬3 of cement, 500-1000 kg/m¬3 of fine aggregate, and 100-200 kg/m¬3 of water for mixing. The soil concrete composition is produced by the steps of (i) introducing 500-1000 kg/m¬3 of natural clay and loamy sand into hopper, mixing the natural clay and loamy sand with 300-600 kg/m¬3 of admixture for absorbing water having a fineness of 4,000 cm¬2/g and more to allow the admixture to partially absorb moisture of clay or loamy sand, and introducing the resulting mixture into crusher to crush the mixture into powder; (ii) mixing 150-250 kg/m¬3 of cement, 500-1000 kg/m¬3 of fine aggregate and 100-200 kg/m¬3 of water into the powder and adding 80-170 kg/m¬3 of water for mixing to the mixture to form a paste of soil concrete; and (iii) applying the paste onto road surface and pressing the paste.

Description

Method for manufacturing rolling compactional soil concrete and composition of rolling compactional soil concrete}

The present invention relates to a method for producing voltage-type soil concrete for road pavement and its composition, which solves the problems of the soil-cement method by raising the conventional simple soil-cement method to the next level.

In general, pavement of roads or areas mainly used by pedestrians such as sidewalks, alleys or light-wheeled areas are coated with concrete, asphalt, or concrete blocks made of cement, water, fine aggregates, coarse aggregates, and mixed materials as needed. Packed. Concrete and asphalt are the most widely used road pavement materials to this day because of their durability, fire resistance, and shock resistance, which can be freely obtained any strength, and impervious, constructable, and relatively inexpensive. It is widely used because it can freely replace damaged parts and realize various colors and shapes. However, existing road pavements such as concrete and asphalt have smaller specific strengths than their own weight, Has relatively weak tensile strength and flexural strength and is prone to cracking due to dry shrinkage. And because the color is limited to gray or black color, regardless of the city or rural area, it has a problem of unfavorable natural environment as well as unfavorable effect on the mentality of the person by uniformizing the surrounding environment. In addition, concrete or asphalt, such as natural regression is almost impossible, when the end of life requires a separate disposal process, there was also a problem that takes too much waste disposal cost.

In this regard, as a new attempt to solve the shortcomings of concrete and asphalt, Soil-Cement that has secured more than 10 kg / cm ^{2 of} uniaxial compressive strength by mixing solidified materials such as cement with sandy soils The construction is partly used in low-level pavements (farm roads, forest roads) and trails. This soil-cement method is a method of empty mixing in soils of sandy soils, laying cement where it is to be applied by mixing it with a backhoe or stiffener, and applying voltage to a roller to finish it. It is mainly used for the base of light traffic roads and has been sometimes paved on roads that require natural and environmental friendliness such as pedestrian roads, trails, farm roads and forest roads.

However, when the surface layer is constructed with this soil-cement method, it has problems with durability and abrasion resistance, and because soil particles do not break and contain agglomerated parts, the surface is damaged during the rainy season, and the pavement is broken due to the East Sea during the cold season. It has been a phenomenon, and recently Japanese fires have been imported and used, but it is also difficult to put them to practical use. This is because there is a problem in the following small-cement method itself.

First, the soil should be powdered to uniformly mix the individual particles of the soil with the particles of cement or solidified material, but the conventional soil cement method is overlooked. That's because Soil-Cement is still a low-end package for simple packaging or substrates.

Granulating the soil requires enormous expenses and equipment additions, including transportation costs.

Second, there is a problem with bin mix. When the soil is granulated, even if it is a coarse particle, the powder degree is 500 cm 2 / g or more, but it is impossible to design the empty mixture in order to mix the binder evenly among the particles.

Third, there is a limit to wear. The surface area of individual soil particles is very small, but the binding of these particles is limited. Therefore, it is necessary to reinforce aggregates with a large surface area that can be more adaptable to abrasion.This method overcomes the limitations of simple packaging because it does not meet the standard performance required for packaging materials such as compressive strength, flexural strength, abrasion, durability, freeze-thawing and permeability. It was not easily damaged or lost, especially in climates where four seasons are distinct and two-thirds of the annual rainfall is concentrated during the rainy season. It was pointed out as a major problem.

On the other hand, the inventors of the present invention in the patent application No. 47,153 dated November 4, 1998, to solve the problems of the conventional concrete or asphalt, or the conventional simple small-cement method, the soil as a main component, but the natural landscape Soil concrete that can be integrated, as well as requirements required for road pavement, such as strength characteristics (compressive strength of at least 180 kg / cm2, flexural strength of at least 40 kg / cm2), abrasion resistance, and semi-permeability, A new soil concrete composition has been disclosed which comprises 20 to 50 weights, 10 to 30 weights of cement-based solidifying agent having a specific surface area of 4,500 cm 2 / g or more, and 30 to 60 weights of aggregate.

The present invention is completely powdered without drying the soil in the natural state to prevent surface fringing and the East Sea, to express the strength characteristics by design of the sub-mixture in a state that does not affect the natural color of the soil, aggregate ( Fine aggregate, coarse aggregate) to increase wear resistance and to have a more natural aesthetic, thereby solving the disadvantages of the conventional empty blended soil-cement method and integrating with the natural landscape, that is, maintaining the advantages of the soil-cement as it is. Its purpose is to provide a voltage-based soil concrete.

1 is a configuration diagram of voltage type concrete.

2 is a block diagram showing a manufacturing process of voltage-type soil concrete,

Figure 3 is a block diagram showing the construction procedure of the voltage-type soil concrete according to the present invention.

Explanation of Reference Numbers for Main Parts

1: aggregate (gravel) 2: fine aggregate (sand),

3: cement 4: cement

5: blast furnace slag

Voltage type concrete concrete of the present invention is divided into two types, there is a method of using a thick aggregate and a method of not using. It is divided into applications that require only soil texture and when natural stone is exposed to the surface and a natural atmosphere is required.

In order to achieve the above object, the voltage-type soil concrete of the present invention is 500 ~ 1,000 kg / ㎥ of soil (viscous soil, sandy soil) collected in natural state, cement 150 ~ 250 kg / ㎥, blast furnace slag 300 ~ 600 kg / ㎥, fine aggregate 500 ~ 1,000 kg / ㎥, water 100 ~ 200 kg / ㎥, crude steel 3 ~ 10 kg / ㎥, or soil collected from natural state (viscous clay, sandy soil) 400 ~ 800 kg / ㎥, admixture 200 It consists of -500 kg / ㎥, cement 100-250 kg / ㎥, fine aggregate 400-600 kg / ㎥, coarse aggregate 200-500 kg / ㎥, water 80-170 kg / ㎥, crude steel 3-10 kg / ㎥ It features. The unit of kg / m 3 in the above and below (including the claims) is described in units indicating the weight of each constituent composition per unit volume (m 3) of the final voltage-type soil concrete.

In addition, the admixture in the composition is a factor that contributes to the powdering of the soil by absorbing moisture in the cultivation of blast furnace slag, lime-based minerals (for example, lime, quicklime, gypsum) or fly ash, etc. Can be selected. It is preferable to mix the soil in natural wet state with the admixture first, and then to completely powder the mixture with a crusher while letting the admixture absorb some of the moisture in the admixture. In addition, in order to produce a natural atmosphere, it is preferable to finish the surface by applying a natural voltage or crushed stone in a wet state after performing a primary voltage with a roller and performing a secondary voltage and a vibration voltage. In addition, it is preferable to spray the water-soluble acrylic 20-40kg / a on the surface to increase the wear resistance.

Hereinafter will be described a manufacturing process of the voltage-type soil concrete according to the present invention.

(Step 1)

Process of crushing by mixing soil and moisture admixture.

The voltage-type soil concrete according to the present invention is a natural soil whose main component is not easily collected from the surroundings but not from cement. In general, the soil collected in the natural state is a wet material and contains a lot of agglomerated parts, so that it is impossible to homogeneously mix with cement or slag powder. Therefore, a separate process for homogeneous mixing is required. After collecting soil in the natural state, remove gravel and dirt, put it into the hopper with equipment, mix the soil coming out of the hopper with a certain ratio and the admixture coming out of another hopper, and let the mixed material suck some of the soil moisture. After the mixture is added to the crusher, it is pulverized into a complete powder state and mixed until uniformly mixed.

Generally, sandy soil particles are larger and harder than viscous soil particles, but the basic characteristics of powder are similar. In this process, primary mixing of the admixture and soil occurs, and the mixture is ground and agitated by crushing to obtain a homogeneous and homogeneously granulated soil mixture. Through this process, the soil can be easily mixed with the binder such as cement by removing the contained moisture and making it as granular as possible without performing a separate heating process.

Blast furnace slag is preferable as a moisture absorption admixture, and lime series and fly ash can also be used instead of blast furnace slag. Since blast furnace slag is generally distributed in the market, it is easy to purchase. The higher the degree of powder, the better, but more than 4,000 cm 2 / g. Actually, the blast furnace slag powder on the market is about 4,400 cm 2 / g.

Soil is preferably clay or sandy soil which contains organic matter or excludes reactive soil. Soils of sandy soils are better than viscous soils for strength, but viscous soils are advantageous for expressing the texture and color of soils.

The mixing ratio of soil (viscous clay or sandy soil) and admixtures collected in the natural state is 300 to 600 kg / m3 of admixtures for 500 to 1,000 kg / m3 of soil or 200 to 500 kg / m3 of admixtures for 400 to 800 kg / m3 of soil. The ratio of m 3 is preferred, and this mixing ratio is appropriately selected depending on the amount of aggregate and the amount of the mixture to be added later.

(2nd step)

Compounding process.

According to the first step, the soil moisture is appropriately reduced by mixing the soil and the admixture, and the material is discharged to a mixer in a state in which the particles of the soil are powdered and mixed with cement, fine aggregate, and coarse aggregate. The blended water is sprayed from the outlet after mixing is complete. When the blended water is mixed together, the powder in the form of particles combines first, and smooth mixing is impossible.

Cement is a solidified material that allows the constructed soil concrete to have a certain mechanical strength and durability. When cement is mixed at a rate of 500 to 1,000 kg / m3 of soil collected in natural state and 300 to 600 kg / m3 of hygroscopic admixture, The ratio of cement is 150 to 250kg / ㎥, fine aggregate is 500 to 1,000 kg / ㎥ is preferable, and when the soil is mixed at a ratio of 400 to 800 kg / ㎥, moisture absorption admixture 200 to 500 kg / ㎥ It is preferable to mix in the ratio of kg / ㎥, fine aggregate 400 ~ 600 kg / ㎥, coarse aggregate 200 ~ 500 kg / ㎥.

On the other hand, as a performance-improving admixture, it is possible to use crude steel, which should be adjusted according to the required opening speed as it increases traffic openness. However, when the input amount is excessive, the quality is adversely affected, so it is used about 3 ~ 10kg / ㎥. The coarseness is mixed with the mixed water.

Cement uses KSL 5201 ordinary portland cement, which should not exceed about 9 of its total weight. When the amount of cement exceeds 9, the natural color of the soil is damaged and the whitening phenomenon is intensified. However, when the amount of cement is used too much, not only the problem of strength develops but also the initial strength is delayed and the crack by shrinkage increases.

Fine aggregates and coarse aggregates are generally acceptable if they are of the quality used for concrete. The fine aggregate is advantageously more than the medium sand (medium) rather than fine yarn (sa) in order to increase the surface wear resistance, the size of the thick aggregate is preferably within 1/5 of the thickness of the surface layer.

(3rd step)

On-site casting process

A predetermined amount of compounding water is added to the mixture of soil, admixture, cement, and aggregate prepared by the above-described process and placed on the road surface to be poured. The water is sprayed on the auxiliary base before pouring. If the auxiliary base is sand, cover it with polyethylene film, separate it and install it.

(4th step)

Surface addition process

This process is an additional process that can be selectively carried out as needed, and after the primary voltage, the natural stone or crushed stone in the wet state can be laid and subjected to the secondary voltage and / or vibration voltage to finish the surface. Abrasion resistance may be increased by spraying on a surface of water-soluble acrylic 20-40 kg / a. After curing, open traffic to the public.

1 is a cross-sectional configuration of the voltage-type soil concrete according to the present invention soil (4), cement (3), blast furnace slag (5), fine aggregate (sand) collected in a natural state through the same process as the rock described above ( 2), coarse aggregate (gravel) (1) and the like as the main constituent, and the compounded water (water), admixture (adjuvant) and the like are formulated. As can be seen from the diagram, voltage-type soil concrete has increased abrasion resistance by adding fine aggregate and coarse aggregate compared to the conventional soil-cement method, and slag and lime having a large part of the binder having minimal influence on the color and texture of the soil. Family, fly ash, etc. The reason why the cement is not more than 9 of the total weight is because it takes into account that the natural color of the soil will be harmed and the bleaching will be deepened if it is 9 or more.

The following table is a comparison of various embodiments shown by varying the compounding ratio of each component of the present invention, including the respective components as described above, the unit is kg, and the case where the voltage of all 30kg / ㎠. Intensity measurement is performed after curing under curing conditions at a relative humidity of 95 and a temperature of 23 ° C, and soaked in water one day before measurement, and taken out of water again to remove moisture.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 soil Viscous soil 700 Sandy soil 700 Viscous soil 600 Sandy Soil 600 Viscous soil 700 Sandy Soil 600 Viscous soil 700 Binder 1 Cement 200 Cement 200 Cement180 Cement180 Cement 200 Cement180 Cement 200 Binder 2 Slag 400 Slag 400 Slag320 Slag320 Slaked lime 400 Slaked lime320 Fly Ash400 Fine aggregate Sand 700 Sand 700 Sand 600 Sand 600 Sand 700 Sand 600 Sand 700 Coarse aggregate Sleeping 300 Sleeping 300 Sleeping 300 Formulation water Water150 Water150 Water130 Water130 Water150 Water130 Water150 Admixture Roughening agent 5 Roughening agent 5 Roughening agent 5 Roughening agent 5 Roughening agent 5 Roughening agent 5 Roughening agent 5 Pushing strength kg / ㎠ 248 273 236 251 212 197 126 Flexural StrengthN / ㎠ 562 616 522 581 435 412 286

As shown in Examples 1, 2, 3, and 4, the use of coarse aggregates reduced the amount of binder and the number of units, but the use of coarse aggregates did not significantly affect the strength. This is the result of reducing the amount of binder. As shown in Examples 5 and 6, when the slaked lime was used, the strength was less than that of the slag, but the color was clearer. In Example 7, the strength was significantly reduced.

The voltage-type soil concrete manufacturing process of the present invention consisting of the above components is carried out on the line in the sequence as shown in Figure 2 and the details are as described above.

Figure 3 shows the construction of the voltage-type soil concrete according to the present invention.

As described in detail above when constructed with a voltage-type soil concrete according to the present invention has the following advantages and effects.

First, it eliminated the surface dent and the East Sea, which could not be solved by the conventional soil cement method.

Second, high-strength paving work could not be imagined by the conventional soil cement method.

Third, the use of aggregates provides superior wear resistance than the soil cement method.

Fourth, the resistance to freeze-thawing, softening due to penetration, etc. is superior to the existing soil cement method, so it is absolutely advantageous in terms of long-term compatibility.

Fifth, the heat absorption rate and conductivity are low, which gives comfort to pedestrians by lowering the temperature of the pavement surface in comparison with other packaging materials in the cold season.

Sixth, it has the most environmentally friendly characteristics and integrates with nature so that it has a friendly feeling without having a sense of humanity.

Seventh, it can reduce the problem of environmental pollution due to the existing large concrete or asphalt waste because it is returned to the natural state through the weathering action according to the time elapsed during disposal.

Claims (8)

It consists of 500 ~ 1,000 kg / ㎥ of viscous or sandy soil collected in natural state, 300 ~ 600kg / ㎥ of moisture absorption admixture, 150 ~ 250kg / ㎥ of cement, 500 ~ 1,000 kg / ㎥ of fine aggregate, and 100 ~ 200kg / ㎥ of mixed water. Voltage-type soil concrete composition characterized in that. Viscous or sandy soils collected in nature 400-800 kg / ㎥, cement 100-250 kg / ㎥, hygroscopic cyclizing agent 200-500 kg / ㎥, fine aggregate 400-600 kg / ㎥, coarse aggregate 200-500 kg / ㎥ The voltage-type soil concrete composition which consists of 80-170 kg / m <3> of mixing | blending water. The method according to claim 1 or 2, Voltage-type soil concrete composition characterized in that it further contains 3 ~ 10kg / ㎥ of crude steel. The method of claim 3, wherein The hygroscopic admixture is blast furnace slag, lime-based mineral or fly ash any one of the voltage-type soil concrete composition 500 to 1,000 kg / m3 of clay or sandy soils from which natural gravel and dirt have been removed are added to the hopper, and the powder of clay or sandy soil coming out of the hopper at a constant rate from other hoppers also absorbs more than 4,000 ㎠ / g Mixing the mixed admixture with 300 to 600 kg / m 3 to cause the mixed adsorbed some of the moisture of the viscous or sandy soil, and then putting the mixture into a crusher to pulverize the powder; Mixing cement 150 to 250 kg / m 3, fine aggregate 500 to 1,000 kg / m 3, and water 100 to 200 kg / m 3 and then adding 80 to 170 kg / m 3 of blended water to form a soil concrete paste; And, The process of laying and applying voltage on the road surface on which the soil concrete paste is to be placed Voltage type concrete concrete manufacturing method comprising a The method of claim 5, The hygroscopic admixture is blast furnace slag, lime-based mineral or fly ash any one of the voltage-type soil concrete manufacturing method. The method of claim 5, A method of manufacturing a voltage-type soil concrete, characterized in that it further comprises the step of laying the natural stone or lithotripsy in a wet state after the soil concrete voltage process and performing a secondary voltage and / or a vibration voltage to finish the surface. The method according to any one of claims 5 to 7, A voltage-type soil concrete manufacturing method, characterized by further spraying water-soluble acrylic 20-40 kg / a on the surface of the installed soil concrete.