KR20130027116A

KR20130027116A - The composition for ocherous soil concrete and road paving method using the same

Info

Publication number: KR20130027116A
Application number: KR20110090478A
Authority: KR
Inventors: 김응수
Original assignee: 김응수
Priority date: 2011-09-07
Filing date: 2011-09-07
Publication date: 2013-03-15
Also published as: KR101273006B1

Abstract

The present invention relates to an earth concrete composition expressing ocher color and a road pavement method using the same. Natural loess, which is a material used in the prior art, reduces strength and durability, and artificial pigments such as iron oxide have artificial and chemical images. , Scarlet powder has a problem such as environmental damage due to expensive processing cost and strong alkalinity, but the present invention is to produce alumina in bauxite and neutralize the scarlet clay to be embedded with industrial waste to solve this problem By making ocher soil and then making ocher earthy concrete, it is possible to reduce the purchase cost and processing cost of materials, and it does not generate dust when working like ocher, iron oxide and scarlet powder, and it does not cause environmental harm by neutralizing strong alkalinity. As well as to make the ocher water colored More than it can be expressed in a natural and earthy, and to a more environmentally friendly way by absorbing pavement, remove it by using spraying sawdust after the pavement can be alkaline residue. Therefore, the present invention can be used by neutralizing the scarlet clay, which had to be used by drying and pulverizing in the prior art, without processing, thereby reducing manufacturing cost and strong alkalinity by dramatically improving technology and recycling industrial waste. Significantly improved.

Description

Yellow earthy concrete composition and road paving method using same {THE COMPOSITION FOR OCHEROUS SOIL CONCRETE AND ROAD PAVING METHOD USING THE SAME}

The present invention relates to an earth concrete composition expressing ocher color and a road pavement method using the same, and more particularly, scarlet clay extracted from alumina from bauxite to express natural ocher color (Scarlet Clay, aka; Red mud) was neutralized with acid rainwater and waste sulfuric acid, and then made ocher water and mixed with the material of masato soil and aggregate, and the soil concrete composition expressing ocher color and road paving method using the same will be.

In general, the colors of the existing roads are mainly composed of black of asphalt and gray of cement concrete for reasons of driver's safety. However, pedestrians, trails, bicycle roads, etc. are not simply driving spaces. Due to the nature of living spaces, natural ocher colors are preferred, providing users with an emotional and friendly image.

Like this, in order to satisfy the users, orderers, and contractors by expressing the natural ocher color on the road, the natural ocher color must be expressed technically, which should be an economical and eco-friendly method, which is easy to construct and secures the price competitiveness of the product. The development of such technology is required.

However, according to the prior art, there have been various attempts to develop the following technologies in the selection and mixing of materials in concrete manufacturing to express yellow earth color on concrete pavement, but there are problems such as technicality, economical efficiency, and environmental performance. And the availability of the industry was scarce.

First, in the manufacture of cement or earth concrete, it was intended to express the yellow earth color by mixing artificial pigments such as iron oxide.

Korean Patent Registration No. 10-0901883 (Cement Concrete Composition Containing Iron Oxide Pigment) According to 2009.06.02, p. 4, paragraphs 28 to 29, iron oxide is an inorganic pigment, which is non-toxic, chemically stable, and can produce various colors. It is described that there is an advantage that iron oxide is mixed with water in a certain ratio.

However, the color of the resultant using the iron oxide has a problem that the artificial, chemical image is not practical, the practical economic efficiency due to expensive iron oxide purchase cost is not widely used.

This, in turn, has a problem that does not correspond to the purpose of the practical concrete technology development to express the natural yellow earth color.

Second, in the manufacture of cement or soil concrete, natural ocher was collected and calcined at high temperature, and then crushed and mixed into fine powder to develop ocher color.

Republic of Korea Patent Registration No. 10-0406440 (Method for paving cement concrete road and manufacturing cement block using soil as part of material) 2003.11.07, p. 2, line 24 ~ 27, Republic of Korea Patent Registration No. 10-0408594 Paver and its manufacturing method) 2003.11.25, page 1 Composition and function of the invention, Republic of Korea Patent Registration No. 10-0457997 (ocher concrete composition) 2004.11.11, page 2, line 30 ~ 34, according to the In order to express the ocher color in concrete, natural ocher is fired at high temperature and then pulverized and mixed with fine powder. However, the processing cost of collecting natural ocher and firing it at high temperature and then grinding it into fine powder is high. The economic efficiency of ocher-colored concrete is poor, and there is little industrial utility and practicality. In addition, natural ocher-color is produced by firing natural ocher at high temperature and grinding it into fine powder. If you mix them much to solve the real problem is that there are problems such as deterioration of the concrete strength and durability occurs.

This, in turn, had a problem inconsistent with the purpose of technology development to develop a practical concrete road pavement method of the natural yellow earth color.

Third, strong alkaline scarlet clay (SC, Scarlet Clay, aka; GEL) of the industrial by-products remaining after producing alumina from bauxite ore in the manufacture of cement or earth concrete (sticky state of 40 to 50% moisture); Red mud) was dried at high temperature and then mixed with a powdered scarlet powder (SP, Scarlet Powder) or fine grained Scarlet Granule (SG, Scarlet Granule) to try to express the yellow earth color.

That is, in the related art, due to technical limitations, the original raw sticky original scarlet clay (SC, also known as Red Mud) cannot be used, and inevitably, it has to be processed by drying and then grinding it.

However, these processed materials have enormous facility costs and processing costs for drying and grinding, and they are economical, environmentally friendly, and degraded by using them in a strong alkaline state or by purchasing expensive 0.1N NAOH solutions without neutralizing them. There was a serious problem with practicality.

In addition, when using these scarlet powder (SP) and scarlet granules (SG), and paving the road without neutralizing the strong alkalinity, it appears that the yellow earth color appears at the time of pouring when the concrete contains water. After evaporation and drying, whitening occurs due to the strong alkalinity of pH 12 on the road, and the surface is smeared, thereby failing to meet the intention of developing technology for expressing ocher color.

Republic of Korea Patent Registration No. 10-0568156 (Scarlet color functional concrete and road paving method using the same) According to the description of 2006.03.30, page 4, line 12 to 18, the concept of scarlet powder, the main material used to express the yellow earth color After extraction of alumina from bauxite, scarlet clay (SC, Scarlet Clay, also known as Red Mud) in gel (GEL) is discharged as sludge (sludge) of 45-50% of moisture. As the sludge is recycled, it is defined as being pulverized using a pulverizer after drying to about 15% of moisture through a drying process.

In addition, according to Korean Patent Registration No. 10-0460262 (Manufacturing method of artificial ocher mortar using red mud and construction method of artificial ocher mortar) 2004.11.26, page 4, lines 1 to 10, alumina extracted from bauxite After the gel (SC, Scarlet Clay, also known as Red Mud) in the gel (GEL) state by firing and activating 0.5 ~ 2 hours at a high temperature of 700 ~ 900 ℃ to make fine artificial clay (Scarlet Granules) It is defined.

However, red mud, an industrial by-product that remains after extraction of alumina from bauxite, Scarlet Clay (SC), is available in three forms, the first of which is the scarlet clay SC, Scarlet Clay, Scarlet Mud), Scarlet Powder (SP, Scarlet Powder, Scarlet Powder) and Scarlet Granules (SG, Scarlet Granule, Scarlet Granules) processed after high temperature drying are all pH 11 ~ Since it is a strong alkaline material of about 12, if it is mixed immediately without using a separate process such as neutralization during concrete manufacturing, and used for paving the road, the strong alkaline material is eluted, which adversely affects the ecosystem around the road, thereby degrading the environment. Sodium ions (Na +) are eluted by using 0.1N NAOH solution, so the white pavement is produced. It had become very messy issues such as the current becomes mottled.

In addition, scarlet powder (SP) and scarlet granule (SG) scarlet granules (SG, scarlet clay) in the drying process at a high temperature after grinding or crushing them, which requires expensive processing costs As a secondary product that includes value-added, if you purchase ocher concrete with Portland cement price level, it is not economical due to expensive manufacturing price, and it is not practical for the contractor. There was this.

In addition, since these materials are put and mixed in the powder state during mixing with the concrete, there is a problem in that the quality of the concrete is deteriorated due to frequent damages caused by harmful dust generation and agglomeration of materials.

This implies that it does not meet the intention of technology development to develop a practical concrete road pavement method in which natural yellow earth color is expressed.

As described above, according to three conventional techniques for expressing ocher color in concrete, namely, artificial pigment use technology such as iron oxide, ocher fine powder use technology, scarlet powder use technology, etc., unnatural artificial color image production and expensive manufacturing cost Due to lack of economic feasibility, environmental damage around road pavement due to strong alkalinity, harmful dust during work, and quality deterioration due to agglomeration of materials, there was a problem that its practicality and industrial availability were inferior.

In addition, the conventional technology is to cover the curing vinyl without removing the strong alkaline surplus water eluted on the pavement by manufacturing concrete, including roads by producing concrete containing the environmental problems caused by the use of a strong alkaline material in this way By curing, there was a problem that strongly alkaline environmental harmful substances remaining on the road surface during rainy weather adversely affect the surrounding ecosystem.

Therefore, the present invention is to solve such a problem,

First, the present invention is to solve the problem of economics in the manufacture of ocher earthy clay concrete composition, the conventional technology uses expensive artificial iron oxide as the main material to express the ocher color or artificially use natural ocher or scarlet clay (SC) In view of the high production cost by purchasing and using materials that have been calcined and dried at high temperatures and then pulverized into fine powders, industrial a by-products are processed and sold into scarlet clay (SC) as products with added value. Instead of using powdered scarlet powder (SP) or fine-grained scarlet granules (SG), it is recycled by using the original scarlet clay (SC), which is a landfill with industrial waste and can be purchased free of charge. It solves the economic problem of manufacturing.

In Korea, about 200,000 tons of scarlet clay (SC) is generated as industrial by-products annually, and about 50,000 tons are secondary products after drying and crushing with scarlet powder (SP) or fine grained scarlet granules (SG). It is used as a material for color cement additives, pigments, heavy metal removal, paint primer, brick (red brick, flooring), soil improver, artificial reef (ceramic panel), and the remaining 150,000 tons of scarlet clay (SC) ) Is a landfill under treatment with industrial waste.

Therefore, the present invention is a technology developed to neutralize and recycle the original scarlet clay (SC) of the raw state that is disposed of as it is, so that consumers can supply low-priced yellow earthy concrete and paved roads using the same. In addition, alumina producers can save a large amount of waste disposal costs, and socially, they can minimize environmental load through industrial waste recycling.

Second, the present invention to solve the environmental problems in the manufacture of ocher earthy clay concrete composition, the prior art is to use a scarlet powder (SP) or scarlet granule (SG) of strong alkaline (pH11 ~ 12) to express the ocher color In the environment, the original scarlet clay (SC) is processed in acid rain water (in the rainy state) by adversely affecting the ecosystem around rainy weather by producing environmentally harmful concrete by mixing it together in a blender together with other materials without neutralization. pH 5.6 or less) and waste sulfuric acid (pH2 or less), which is a neutral wastewater, was first prepared first, and then neutralized yellow ocher water (pH8-9) neutralized stably. By mixing cement, masato soil and aggregate, and other subsidiary materials to make ocher soil step by step to produce the environment of the prior art. The problem was solved.

In the case of H company, one of the semiconductor manufacturers in Korea, industrial sulfuric acid waste sulfuric acid is generated more than 10,000t / year per year, and there is a need to minimize environmental load by recycling it.

In Fig. 1, the process of first preparing the yellow soil water first, and then using the secondary water together with water as a blending water to prepare the yellow soil soil concrete, and then paving the road.

The present invention, by separating the step of neutralizing the scarlet clay (SC) to produce ocher water and the step of producing ocher earthy soil concrete using the neutralized ocher water as a blending water, the prior art is all materials at once The problems such as agglomeration of materials, incomplete coloring, strong alkalinity, and manufacturing inconvenience caused by mixing at the same time were solved.

Third, the present invention to solve the environmental problems due to the strong alkaline surplus of the concrete pavement surface, the conventional technology is paved after paving the road with concrete manufactured using a strong alkaline scarlet powder (ph11 ~ 12), By covering the curing vinyl without removing the strong alkaline surplus water that is eluted from the cotton, the strong alkaline substance remaining on the road surface caused environmental damage to the surrounding ecosystem during rainy weather. After pouring the powder, spray dried sawdust to the thickness of 0.5 ~ 1cm on the pavement surface to absorb alkaline cement surplus water at the time when the pavement surface completes solidification reaction. By absorbing unnecessary cement surplus water into sawdust and removing it, the environment of concrete pavement surface of the prior art The hazard problem was solved.

As described above, the sawdust absorbed strong alkaline surplus water after the completion of the curing of the ocher earthy soil concrete is used for the purpose of neutralizing it by spraying on the strong acid soil that needs to be neutralized, as well as to function as a natural fertilizer after the sawdust fermented. This is more preferable.

The ocher earthy soil concrete composition of the present invention for achieving the above object, per 1㎥ of ocher earthy soil concrete composition, cement 322 ~ 372kg / ㎥, water 93 ~ 113kg / ㎥, yellow soil water 74 ~ 94kg / ㎥, fine aggregate 601 ~ 701kg / ㎥, coarse aggregate 773 ~ 973kg / ㎥, Masato 92 ~ 132kg / ㎥, admixture 3.5 ~ 4.5kg / ㎥, reinforcing fiber 1kg / ㎥ or less, slump 8 ~ 16cm, 28 days compressive strength 180 ~ 300kg / ㎠ It is characterized by that.

Said cement is a general Portland cement (OPC) or blast furnace slag cement, It is characterized by the above-mentioned.

Said water is characterized by being water of a clean state without containing an organic substance.

The ocher water is characterized in that it was prepared according to a separate blending ratio and mixing method, 668 ~ 868 kg / ㎥ of scarlet clay per 1 ㎥ of yellow soil water, acid rainwater 952 ~ 1,352 kg / ㎥, waste sulfuric acid 86 ~ 116 kg / Mix well with ㎥, characterized in that the slurry with a moisture content of more than 95%.

Said fine aggregate is sand used for general civil engineering, It is characterized by the above-mentioned.

The coarse aggregate is characterized in that the size is 13mm or less.

The purpose of mixing, including the masato, is to further improve the coloring function of the ocher color in preparing the ocher earthy clay concrete composition, and to provide a pavement road visually to give a soft texture and image of the earth. Therefore, it is preferable that Masato is sandy-like without organic substance.

The admixture is a polycarboxylic acid-based high performance AE water reducing agent.

The reinforcing fiber is characterized in that the PET fiber of 8 ~ 12mm length.

Table 1 below shows the standard blend ratio of the yellow earthy soil concrete composition.

In addition, the road pavement method using the ocher earth soil concrete composition of the present invention for achieving the above object, to prepare the ocher earth soil concrete composition by mixing cement, water, ocher water, fine aggregate, coarse aggregate, Masato, admixture, reinforcing fibers Making; Pouring the mixed ocher earthy concrete composition; Finishing the surface on which the yellow earthy soil concrete composition is installed; After finishing the surface on which the ocher earthy concrete composition is poured, it is characterized in that it comprises the step of spraying sawdust and curing with curing vinyl.

Hereinafter, the ocher soil color concrete composition according to the present invention and the road paving method using the same will be described in detail.

The ocher earthy soil concrete composition according to the present invention includes cement, water, ocher water, fine aggregate, coarse aggregate, masato, admixture, reinforcing fiber, expresses the natural ocher color, and contains the appropriate amount of masato to provide the ocher color coloring function. It further improves and provides a road paving method that provides a smooth texture and image of the soil.

The water-cement ratio (W / C) is preferably 45% to 55%.

One of the features of the present invention is also included in the water to determine the water-cement ratio (W / C).

In order to prepare the ocher water of the present invention, a predetermined amount of water is required, and the scarlet clay (SC) itself contains 40 to 50% water, and per 1 m3 of yellow soil water, 1,152 kg / m3 of acid rainwater and waste Sulfuric acid 96kg / ㎥ is added to produce a slurry of yellow soil water of 95% or more moisture content.

The ocher water of the present invention also determines the water-cement ratio (W / C), but exhibits an important coloring function to allow the soil concrete to develop an ocher color.

In order to prepare the yellow soil water of the present invention, after neutralizing strong alkaline scarlet clay (SC) in the gel (GEL) state, which is the industrial waste produced from alumina from bauxite, it is neutralized with acid rainwater and waste sulfuric acid, and the hydrogen ion concentration is pH8. It is necessary to prepare stable ocher water expressing ocher color of ˜9, wherein scarlet clay, the main functional material of ocher color expression used, is sticky state before drying and processing with powder (powder) or fine granules (granule) ( 45 ~ 50% water) into acid rainwater (pH5.6 or less), which is stored in advance, and then put back the waste sulfuric acid (pH2 or less), which is the industrial waste produced after producing semiconductors, At the same time, the mixture should be sufficiently mixed for 10 to 20 minutes in a dedicated blender so that ocher water with a pH of 8 to 9 can be produced.

For the waste sulfuric acid described above, it is preferable to use waste sulfuric acid having a pH of 2 or less generated as industrial waste after producing semiconductors and the like in large companies for stable supply of water and maintaining a constant acidity.

More preferably, when it is not possible to procure waste sulfuric acid, it may be replaced by a high concentration (pH 2 or less) of strong acidic material in industrial waste such as waste nitric acid.

Table 2 shows the chemical composition, color, pH, and moisture of scarlet clay (SC), scarlet powder (SP), scarlet granule (SG), and yellow soil water.

The ocher water is based on the inventors of the present invention per 1 m 3 of ocher water, scarlet clay (SC) 768 kg / ㎥, acid rainwater 1,152 kg / ㎥ at room temperature, 96 kg / ㎥ of sulfuric acid waste, the mixing time is all In the same manner, the mixed weight of acid rainwater and spent sulfuric acid was added or subtracted by 20 kg / m 3, and the mixture was mixed well for 15 minutes in a dedicated mixer, and the hydrogen ion concentration of the resultant was pH 7. Yellow soil water of 7 ~ 9.5 could be obtained, and in case of reference value, pH8.6 was shown.

In addition, as a result of preparing the soil concrete composition expressing the yellow soil color using the obtained yellow soil water as a blending water, a composition having a hydrogen ion concentration of pH9.8 to 11.6 was obtained. Indicated.

In view of the fact that the yellow soil water has a pH of 8.6, the yellow earth soil concrete composition shows a pH of 10.7 because the cement input during the concrete production is pH 12.

Therefore, the hydrogen ion concentrations of the yellow soil water and the yellow earth soil concrete composition prepared according to the present invention are pH8.6 and pH10.7, respectively, to solve environmental problems due to strong alkalis having a pH of 12 to 13 generated by the prior art.

Table 3 shows the results according to the examples.

Table 4 shows the mixing ratio and mixing method of ocher water (黃土水).

In addition, according to the embodiment of the experiment by mixing the dried hot scarlet powder with ground water for 15 minutes used in the prior art, the local agglomeration occurs in the mixing process, the cumbersome to grind and mix the corresponding parts again Accompanying the result, the hydrogen ion concentration of the resulting product was found to be pH11.1, and in the case of the soil concrete composition prepared using the same, a strong alkali of pH12.4 appeared.

Table 5 shows the results according to the examples.

In addition, in the purchase of these materials, scarlet clay (SC) was no industrial waste, but in the case of scarlet powder and scarlet granule, the alumina producer produces dry scarlet clay at a high temperature. There was a problem that can be purchased only by paying the purchase price of cement price as a tea product.

Also, in the matter of transporting these materials, the scarlet clay (SC) can be easily transported in the same way as ordinary clay transport without a special container, but in the case of scarlet powder and scarlet granules, they are expensive. The problem was that they had to be transported in a disposable tone bag or a FLECON bag.

Therefore, in the present invention, in order to solve such an uneconomical and impractical problem of the conventional scarlet powder and scarlet granules, the original scarlet clay (SC) before processing is used.

In addition, the conventional technology has serious problems such as environmental problems and economical efficiency, such as using neutral alkali scarlet powder and scarlet granules without neutralizing or using expensive 0.1N NAOH solution, and when producing concrete By mixing and mixing scarlet powder or scarlet granules with all materials at the same time, there are problems such as uneven color appearance due to material agglomeration and irregular color on the pavement surface, so that dirty and natural yellow earth color images are not expressed. However, the present invention solves all the problems such as economics, practicality, technical characteristics, environmental characteristics, and productability at the same time by the above solution means.

In addition, the present invention, after paving the road with concrete prepared using a strong alkaline scarlet powder (ph11 ~ 12), the curing vinyl as it is without removing the strong alkaline surplus water eluted to the pavement surface In order to solve the problem of strong alkaline substances remaining on the road surface by damaging the surface of the road and causing environmental damage to the surrounding ecosystem during rainy weather, surplus water is added when the surface concrete starts to solidify Spray the sawdust dried on the pavement surface to 0.5 ~ 1cm thickness to absorb the water, and then cover the cured vinyl on it to absorb the excess strong alkaline surplus water remaining after the concrete solidification reaction into the sawdust and remove it. The environmental damage caused by this is further minimized.

The ocher-colored soil concrete composition according to the present invention and the effects of the road pavement method using the same are divided into technical, economic, environmental, and visual aspects.

First, as an effect of the technical aspect of the present invention, in the process of producing a concrete composition expressing the ocher color, the sticky of 40-50% of moisture that is not mixed as all the materials are added to the blender at once and mixed at the same time Due to the technical limitation that the sticky scarlet clay (SC) can not be used, there is a problem that inevitably use an expensive scarlet powder (SP) in the form of a powder, the present invention is a process of preparing a material mixing process and ocher By separating into two stages such as soil concrete manufacturing stage, sticky scarlet clay (SC) with 40 ~ 50% moisture is first manufactured with acid rainwater and waste sulfuric acid. By using a scarlet clay (SC) that can be purchased free of charge as industrial waste without using an expensive scarlet powder (SP) So it was technically solved.

As a result, the ocher earthy soil concrete composition according to the present invention uses the free scarlet clay (SC) instead of the expensive scarlet powder (SP) to the purchase price of the scarlet powder (SP), which is the level of cement purchase price. The manufacturing cost can be reduced, and the price competitiveness of the ocher-colored earth concrete road pavement construction cost can be improved, and the scarlet powder material, which was a problem of the prior art by using the pre-manufactured yellow soil water in the mixing process, as a blending water It prevents material agglomeration of powders, making it possible to produce high-quality concrete of even more uniform color.

Second, as an effect of the economic aspect of the present invention, as described above, in the process of manufacturing a concrete composition expressing the ocher color, processed artificial scarlet such as expensive iron oxide or scarlet clay (red mud) which is an industrial by-product By using scarlet powder or scarlet granule at the cement price level, there is no practical demand because there is no product demand due to the price burden, but the present invention can recycle raw scarlet clay which is disposed of and disposed of as industrial waste. By doing so, it is possible to reduce the manufacturing price of iron oxide and scarlet powder purchase price compared to the conventional technology.

Third, as an effect of the environmental aspects of the present invention, as described above, by using the conventional technique as it is without neutralizing scarlet powder (SP) or scarlet granule (SG), which is a highly alkaline substance of high concentration (pH11-12) Due to soil pollution, groundwater pollution, etc., environmental damage has been caused to the surrounding ecosystem. However, in the present invention, the scarlet clay (SC) containing 40 to 50% of water before drying and pulverizing these materials is contained. Focusing on this, it adds a step of mixing acid rainwater with high sulfuric acid (pH11 ~ 12) and strong sulfuric acid to produce stable yellow soil water of pH 8 ~ 9. It was possible to prepare a concrete composition.

In addition, in the process of producing ocher water according to the present invention, by not using the ocher powder, iron oxide, scarlet powder, etc., which generate dust as in the prior art, it is possible to prevent the surrounding damage due to the generation of harmful dust during operation.

Furthermore, the present invention, unlike the conventional concrete road pavement method, by spraying the sawdust to 0.5 ~ 1cm thickness in the step of completing the cement hydration reaction pavement surface constructed with the ocher earth soil concrete composition prepared as described above By absorbing and removing surplus water, an improved packaging method has been proposed to achieve more excellent environmental effects.

Fourth, as an effect of the visual aspect of the present invention, in order to express the natural ocher color in concrete and to produce an image of the soil pavement, the use of aggregate is greatly reduced, and the mass of natural ocher or ocher fine powder, which is a clay component, is mixed. After the concrete was manufactured, road pavement was used, which weakened the hydration reaction of cement and caused serious physical and chemical problems such as deterioration of strength and durability and defects in material separation during freeze-thawing in winter. In order to solve the problem of strength and durability by using sandy masato instead of clay or ocher fine powder of clay component, as well as the small pore size of masato particles, fine pores between fine aggregate and coarse aggregate By filling the yellow soil water proposed by the present invention to be uniformly colored on all materials, While such natural earth colors are expressed visually in the conventional cement concrete it is proposed an improved method for providing an image of a texture and a more natural dirt.

Fifth, as an effect of the social aspect of the present invention, about 200,000 tons of scarlet clay (SC) is generated annually in companies extracting and producing alumina from bauxite, but only about 50,000 tons are dried and pulverized at a high temperature to obtain powder (scarlet). Powder) or fine granules (scarlet granules) are commercialized and recycled by the company itself, and about 150,000 tons of landfills are disposed of and discarded, causing serious damage to residents due to the elution of strong alkaline substances. Complaints against or against the situation are constantly occurring.

However, the present invention enables the alumina producer to reduce the landfill and disposal costs by reusing and using the scarlet clay (SC) that is being disposed and discarded as it is, without further processing for landfill residents. The social problem was solved by preventing damage.

1 is a process chart for preparing the ocher earthy soil concrete composition of the present invention and paving it on the road,
2 is a picture of scarlet clay, a recycled material of the present invention, and scarlet powder and scarlet granules, which are materials used in the prior art;
Figure 3 is an experimental photograph of producing a yellow earthy soil concrete composition by mixing the yellow soil water (黄土水) and other materials proposed by the present invention,
4 is a scene of finishing the surface after pouring on the road using the ocher earthy concrete composition prepared according to the present invention,
5 is a scene of removing the sawdust laid for the removal of excess water after pouring on the road using the ocher earthy soil concrete composition prepared according to the present invention,
Figure 6 is a photograph of the loess road constructed using the ocher earthy soil concrete composition proposed by the present invention.

Hereinafter, with reference to Figure 1 will be described in detail for the practice of the present invention.

First, the present invention is a technical aspect for solving the problems of the prior art in the method for the pavement by expressing the ocher color in the concrete composition without using natural loess which is the art of the art.

First, the original scarlet clay (SC), which is embedded in industrial waste, does not use expensive artificial pigments or processed scarlet powder (SP) as the conventional technology in order to significantly reduce the manufacturing cost. , Aka Red Mud) can be recycled.

Second, the prior art is that the scarlet clay (SC) is a sticky material of 40 to 50% of moisture, so that it is not mixed at the same time with other materials in the blender inevitably, and is inevitably dried and crushed at a high processing cost. After the scarlet powder (SP) was to be used after manufacturing, but the present invention has solved the problems of the prior art by adding a yellow soil water manufacturing process.

Third, the present invention, in order to solve the social and environmental problems, scarlet clay (SC) of high concentration strong aliphatic (pH11 ~ 12) material using acidic rainwater and waste sulfuric acid as industrial waste in the above-mentioned yellow soil water production process ) To be economically neutralized before use.

Fourth, in order to protect the surrounding ecological environment by removing the strong alkaline surplus water (so-called cement water) unnecessary for the solidification reaction of cement from the pavement surface after pouring the ocher earth soil concrete composition prepared as described above At the time when the hydration reaction of the noodles was completed, sawdust was placed on the pavement with a thickness of 0.5-1 cm to absorb and remove it.

As such, the sawdust sprayed on the pavement surface does not stick to the pavement surface in the process of covering the cured vinyl, thereby significantly improving workability unlike in the prior art.

Strong alkaline sawdust collected after completion of curing is more preferably recycled to neutralize the strong acid soil.

Hereinafter, with reference to Figure 1, the manufacturing process for the ocher earthy soil concrete composition of the present invention and the road paving method using the same will be described in detail.

(1) yellow soil water manufacturing process

The yellow soil water production process is a core process of the present invention, and the purpose of this process is to solve this technically to use a strong alkaline scarlet clay (SC), which is an industrial waste, which was not used due to technical limitations of the prior art. In addition, by improving the economic feasibility and further neutralizing the high concentration of strong alkali, it eliminates the environmental damage caused by using it as it is without neutralizing and solves the social and environmental problems by eliminating the civil complaints caused by landfilling. It is to solve the problem.

In the ocher water manufacturing process, to produce a slurry ocher water expressing a deep ocher color of more than 95% moisture, hydrogen ion concentration pH 8 ~ 9 as a result of performing the process, a dedicated mixer to perform this process effectively Three kinds of materials such as scarlet clay (SC), acid rainwater, and waste sulfuric acid are added in order, and then 10 ~ 20 so that the sticky scarlet clay (SC) with 40-50% moisture can be completely dissolved and neutralized. Mix enough minutes.

The reference weight ratio of the three materials are shown in Table 4.

The dedicated mixer, a slurry attached to the inside and the acidic rainwater, sticky scarlet clay (SC), waste sulfuric acid, which is added to the inside while rotating the entire cylindrical drum uniformly mixed with the sulfuric acid can be produced in 95% moisture slurry In order to ensure workability and to suppress precipitation of the internal mixture, it is preferable that the rotational speed per minute is about 6 to 10 rpm.

The order of injecting the material into the dedicated mixer,

First, 1,152 kg / ㎥ of acid rain should be added first.

The reason is that, as shown in Table 4, the weight ratio of acid rainwater is 57.14% / wt, which is the largest amount, and the sticky scarlet clay (SC) should not be stuck inside the dedicated blender when it is put in a high concentration (pH2 or less). This is to induce a stable neutralization reaction when the spent sulfuric acid is added.

The acid rainwater is sufficient if it is a general rainwater falling in the country of pH5.6 or less, it is generally known as pH 4-5.

Secondly, 768kg / ㎥ scarlet clay (SC) should be added.

This is to ensure that the scarlet clay (SC) is dissolved in the acid rainwater first introduced without sticking inside the blender.

The scarlet clay (SC) refers to containing 40 to 50% of water in the first pre-processing state in which alumina is produced and remains in bauxite.

If it is dried and the moisture content falls, it is preferable to fill the acid rainwater with the insufficient water content with reference to Table 4.

Finally, 96 kg / m 3 spent sulfuric acid should be added.

The reason for this is to ensure chemical stability and to spread evenly between the acid rainwater and the scarlet clay (SC) which is the lowest amount of the input material.

The waste sulfuric acid refers to waste sulfuric acid having a high concentration (pH 2 or less), which is industrial waste left after manufacturing a semiconductor or the like.

If high concentration of waste sulfuric acid is not available, it is preferable to replace it with strong acid waste acid (hydrochloric acid, etc.), which is an industrial waste that can replace it.

The material introduced in the above order should be continuously mixed in a dedicated mixer for about 10-20 minutes, and recovered before the slurried yellow soil is precipitated in the mixer.

The ocher water prepared as described above is used as a blending water for producing the ocher earthy soil concrete of the present invention. In order to smoothly inject and collect it, it is capable of inhaling and discharging it. Tank lorry provided with this is preferable.

However, when the ocher water producing mixer and the concrete batch plant are integrated, the relevant amount may be directly added to the concrete batch plant without recovering the ocher water separately.

(2) yellow soil concrete manufacturing process

The ocher earthy soil concrete manufacturing process is a process for producing the ocher earthy soil concrete composition to be achieved by the present invention, the production method is preferably in accordance with a batch plant (Batcher Plant) method for producing a general concrete according to the prior art. .

Table 1 shows the standard formulation for producing the yellow earthy soil concrete according to the present invention.

The present inventors disclose a scene of experimentally producing ocher earthy soil concrete according to this standard formulation table, it is possible to understand the properties of color, slump and the like.

The standard value of the material mixture is per 1㎥ of yellow clay soil concrete composition, cement 347kg / ㎥, water 103kg / ㎥, loess water 84kg / ㎥, fine aggregate 651kg / ㎥, coarse aggregate 873kg / ㎥, masato 112kg / ㎥, admixture 4kg / ㎥, Reinforcing fiber 1kg / m 3.

However, in consideration of the properties and properties of each material, in order to produce the ocher earthy clay concrete composition to achieve the present invention, cement 322 ~ 372kg / ㎥, water 93 ~ 113kg / ㎥, ocher water 74 ~ 94kg per 1㎥ / ㎥, fine aggregate 601 ~ 701 kg / ㎥, coarse aggregate 773 ~ 973 kg / ㎥, Masato 92 ~ 132 kg / ㎥, admixture 3.5 ~ 4.5 kg / ㎥, it is preferable to mix the reinforcing fiber 1kg / ㎥ or less.

In addition, it is preferable that the slump of the yellow earthy soil concrete manufactured according to this is 8 to 16 cm, and the compressive strength is 180 to 300 kg / cm 2 for 28 days.

Thus, as shown in FIGS. 4, 5, and 6, the color of the ocher earthy concrete produced is natural ocher color, unlike the color of the conventional ocher concrete having artificial and chemical images. As shown in FIG. 7, it can be seen that the color after the curing and drying is completed by paving the road using the natural ocher color is more natural.

Ocher roads have a dark color when there is moisture, but turn light when the water evaporates, and become dark again when it rains.

The ocher water is characterized in that it was produced according to the mixing ratio and the mixing method of Table 4, in consideration of the physical properties and properties of each material, per 1 m 3 of yellow soil water, scarlet clay (SC) 668 ~ 868 kg / ㎥, Acid rainwater 952 ~ 1,352kg / ㎥, waste sulfuric acid 86 ~ 116kg / ㎥ well characterized in that the slurry with a moisture content of more than 95%.

The coarse aggregate is characterized in that the size is 13mm or less.

(3) Placing and selecting cotton

According to the present invention, the ocher earthy concrete produced in this way may be transported to a construction site using a concrete mixer truck or the like and poured in the construction site as in the conventional method to finish the pavement surface evenly as shown in FIG. 5.

(4) sawdust spraying and excess water absorption

This process is the core content of the road paving method using the ocher earthy soil concrete to be achieved by the present invention, the conventional technology is paved after paving the road with concrete produced using a strong alkaline scarlet powder (ph11 ~ 12), To solve the problem that the strong alkaline substances remaining on the road surface caused environmental damage to the surrounding ecosystem during rainy weather by covering the cured vinyl as it is without removing the strong alkaline surplus water eluted from the cotton. After pouring the soil concrete, spray the sawdust dried 0.5 ~ 1cm thick on the pavement surface to absorb the surplus water when the concrete starts to solidify. Absorbs surplus water into sawdust and removes it, causing environmental damage due to the strong alkalinity of scarlet powder More is to minimize.

In the present invention, since the neutralized scarlet clay (SC) in the process of producing ocher water, the strong alkaline surplus water here is so-called cement water, and refers to the so-called unnecessary surplus water irrelevant to the hydration reaction of concrete.

Therefore, after placing the ocher earthy soil concrete at the construction site to complete the surface selection, 0.5 pavement surface of the pavement surface can be absorbed so that the pavement surface can absorb the strong alkaline surplus water of the pavement surface, which is unnecessary for the hydration reaction. Spray sawdust ~ 1 cm thick.

Sawdust should use unpolluted sawdust dried at less than 10% moisture, and the method of spraying may be mechanical or manual, but it should not be damaged on the packaging surface and is too thin to maintain the quality of the packaging surface after curing. It should not be thick or thick.

(5) curing

After paving the road using the ocher earthy concrete prepared according to the present invention as described above, it is enough to cover the curing surface by curing the curing vinyl and the like on the conventional concrete road paving method.

However, according to the conventional method, even after the completion of the hydration reaction on the pavement surface surplus water remains in the process of covering the curing vinyl, vinyl is stuck to the pavement surface, workability is poor, especially if the wind blows seriously damage the pavement surface Although there was a problem, according to the present invention by spraying sawdust as described above to absorb the surplus water and then covered with curing vinyl on it, unlike the prior art to improve the workability and to protect the packaging surface problems of the prior art Solved the problem.

(6) sawdust removal and joint installation

After spraying the sawdust on the pavement as described above, after curing the vinyl to complete the curing, the sawdust absorbing strong alkaline surplus water must be removed by walking the curing vinyl.

The removal of sawdust should be swept with a soft broom to avoid damaging the pavement surface.The collected sawdust is used for neutralizing it by spraying on strong acid soils that need to be neutralized, and after the sawdust has fermented, it functions as a natural fertilizer. More preferably.

A scene of sweeping sawdust using a soft broom is shown in FIG. 6.

After removing the sawdust from the pavement surface, the crack guide joint should be installed at intervals of 3 to 5 m to prevent cracking of the pavement surface.

S1: yellow soil production process
S11: Process of adding acid rainwater to a dedicated blender
S12: Injecting Scarlet Clay (SC)
S13: Ball for adding spent sulfuric acid
S14: process neutralizing and mixing for 10-20 minutes
S15: process to recover yellow water of 95% or more of moisture
S2: Yellow Brown Concrete Manufacturing Process
S3: road pour and picking
S4: Sawdust Spraying and Absorbing Surplus Water
S5: Curing
S6: remove sawdust and joint installation

Claims

Yellow earthy soil concrete composition per 1㎥, cement 322 ~ 372kg / ㎥, water 93 ~ 113kg / ㎥, yellow soil water 74 ~ 94kg / ㎥, fine aggregate 601 ~ 701kg / ㎥, coarse aggregate 773 ~ 973kg / ㎥, masato 92 ~ 132kg / Yellow earthy soil concrete composition, characterized in that it is mixed in ㎥, admixture 3.5 ~ 4.5kg / ㎥, reinforced fiber 1kg / ㎥ or less.

The method according to claim 1, wherein per 1 m 3 of the yellow soil water, scarlet clay (SC, aka: Red Mud) 668 ~ 868 kg / ㎥, acid rainwater 952 ~ 1,352 kg / ㎥, characterized in that it is mixed with waste sulfuric acid 86 ~ 116 kg / ㎥ Yellow soil water (黃土水).

The ocher water and ocher earth soil concrete composition according to claim 1 or 2, comprising scarlet clay (SC, or red mud) before producing alumina in the bauxite, and before processing such as drying, grinding or the like.

Preparing a yellow clay water by mixing scarlet clay (SC, or red mud), acid rainwater, and waste sulfuric acid;
Preparing a yellow earthy soil concrete by mixing cement, water, ocher water, fine aggregate, coarse aggregate, masato, admixture, and reinforcing fiber;
Pouring the mixed ocher earthy concrete;
Flattening the surface on which the ocher earthy concrete is poured;
Spraying sawdust for absorbing cement surplus water on the finished surface;
Curing the sawdust by covering the curing vinyl;
Removing the sawdust after curing and installing a crack guide joint; And
Yellow earthy soil concrete composition per 1㎥, cement 322 ~ 372kg / ㎥, water 93 ~ 113kg / ㎥, yellow soil water 74 ~ 94kg / ㎥, fine aggregate 601 ~ 701kg / ㎥, coarse aggregate 773 ~ 973kg / ㎥, masato 92 ~ 132kg / M 3, admixture 3.5 ~ 4.5kg / ㎥, road paving method using a yellow earthy soil concrete composition, characterized in that the mixture is mixed to less than 1kg / ㎥.