KR102088440B1 - Manufacturing method of pedestrian-vehicle passage block and thereof product - Google Patents

Abstract

The present invention relates to a manufacturing method for a sidewalk and road block having a harmful substance purifying ability, and to a sidewalk and road block manufactured thereby. The side walk and road block having a harmful substance purifying ability can have excellent durability by using a high-strength artificial aggregate, which provides high bending strength and compression strength and can efficiently purify contaminated air by photochemical reaction; and can reduce environmental contamination by effectively decomposing and removing harmful substances including nitrogen oxides (NOx) and sulfur oxides (SOx). The manufacturing method for a sidewalk and road block having a harmful substance purifying ability is a manufacturing method for a sidewalk and road block consisting of a base layer unit and a surface layer unit, which comprises: a step of preparing a high-strength artificial aggregate which is composed of 10-20 parts by weight of sand, 0.015-0.025 part by weight of graphene or carbon nanotube powder, 5-15 parts by weight of photocatalyst powder, and 1-2 parts by weight of a high-efficiency water-reducing agent with respect to 100 parts by weight of cement and is crushed to a predetermined size; a step of preparing a surface layer unit mixture by mixing 5-20 parts by weight of the high-strength aggregate and 5-20 parts by weight of sand with a fixed amount of water with respect to 100 parts by weight of cement; a step of forming a surface layer unit in the upper part of a base layer unit by inserting the surface layer unit mixture into the upper part of the base layer unit which is inserted and formed at a fixed thickness inside a molding frame; and a step of pressurizing the surface layer unit and curing the same.

Description

Method of manufacturing a beam and driveway block having the ability to purify harmful components and a beam and driveway block manufactured using the same {MANUFACTURING METHOD OF PEDESTRIAN-VEHICLE PASSAGE BLOCK AND THEREOF PRODUCT}

The present invention relates to a method for manufacturing a beam and driveway block having the ability to purify harmful components and a beam and driveway block manufactured using the same, providing high flexural strength and compressive strength, and effectively purifying contaminated air by a photochemical reaction. A high-strength artificial aggregate is used, which is durable, and has a block that blocks harmful components such as nitrogen oxides (NOx) and sulfur oxides (SOx), and has the ability to purify harmful components that can reduce environmental pollution. It relates to a manufacturing method and a beam, driveway block manufactured using the same.

In general, concrete secondary products are mixed by adding cement and water to the aggregate, which is a raw material, and then adding additives and admixtures, and then adding the blended material into the mold of the product to apply vibration and hydraulic pressing to mold the product. After the molded product is loaded into the curing room, the product is made by promoting the hydration reaction of concrete by supplying hot and humid water vapor.

These concrete secondary products are used in various aspects as construction materials. Typical examples include beam and driveway blocks, pitcher blocks, telephone poles, retaining walls, building walls, and various structures. Various pollutants discharged are attached to these concrete products and adsorbed without decomposition, and the adsorbed pollutants are swept away by natural phenomenon such as snow, rain, or wind, and ultimately flow into rivers, rivers, and seas, causing new pollution. It has been found to be formed of matter.

The aggregate used as the raw material of the concrete secondary product is natural aggregates such as sand and gravel collected from rivers, mountains and seas, and artificially aggregated aggregates for special purposes and uses. It is classified as a lightweight artificial aggregate, but the depletion of natural aggregates, which is insufficient in Korea, which has insufficient resources, and in advanced countries abroad, has already reached a serious level. On the other hand, research on the development of alternative products is focused on the study of artificial lightweight aggregates with a light specific gravity, and few studies have made aggregates with similar specific gravity.

For example, in Korean Patent Registration No. 10-0857510 in Patent Document 1, 5-10% by weight of calcium phosphate (Ca3 (PO4) 2), 70-80% by weight of clay, and 10-20 limestone based on the weight of the mixed powder Artificial powder for concrete is disclosed, which is obtained by molding and calcining a mixture of water and water containing a weight percent, and the limestone has a calcium oxide (CaO) content of 50% by weight or more, and is published in Patent Document 2 In the registered patent publication No. 10-1338820, sewage and wastewater sludge powder 40-60 wt%, sand 5-20 wt%, clay 10-20 wt%, gypsum 10-20 wt%, iron 5-10 wt%, ash 1 Preparing a raw material by mixing a composition composed of ˜2% by weight, 5 to 10% by weight of fiber, and 1 to 2% by weight of calcium; Putting the mixed raw materials into a press and subjecting them to pressure molding; A method of manufacturing artificial aggregates using sewage and wastewater sludge, including calcining and cooling the molded material for 12 to 36 hours in a firing furnace at 1,100 to 1,300 ° C, is disclosed.

However, as in Patent Literatures 1 and 2, measures to increase the fire resistance, durability, and abrasion resistance of artificial aggregates have been actively researched, but various chemicals and air pollutants are decomposed or removed to reduce environmental pollution with high strength. There is almost no specific research on the production of high-strength artificial aggregates that have the ability to do the same at the same time.

On the other hand, the demand and supply of automobiles are increasing due to the improvement of living standards, and as a part of economic growth, the atmospheric environment of the city is very poor due to the increase of chemical factories and urban concentration of the population. About 30% of air pollutants are nitrogen oxides (NOx), which cause diseases of the respiratory tract and are known to cause photochemical smog and acid rain.

Currently, it is well known that titanium dioxide has a strong photocatalytic action as a substance that reduces pollutants such as nitrogen oxides (NOx).

Researches to remove nitrogen oxides (NOx) by using such a strong photocatalytic reaction of titanium dioxide have become more and more active and specific in recent years, and the photocatalytic reaction is variously polluted by the use of light energy such as fluorescent lamps and sunlight without additional energy consumption. It has the advantage of being able to decompose substances, and there is a difference in reaction speed, but the photocatalytic reaction has the advantage that it can be applied to both liquid and gas phases, so it is used in a concrete secondary product.

As an example, the Korean Patent Registration No. 10-1205491 of Patent Document 3 includes a coarse aggregate and a non-fired cement, and a lower layer including an arch or semicircular space at the bottom; Located on top of the lower layer, an upper layer comprising sand, ocher, petroform extract, non-calcined cement and aggregate; And a photocatalyst coated on the upper surface of the upper layer; a permeable block containing the same is disclosed, and in Korean Patent Publication No. 10-1960886 of Patent Document 4, an aggregate, cement, water and admixture are mixed to prepare a base layer composition. The first step; After the base layer composition is introduced into the mold 110 provided on the upper side of the vibration lower plate 130, the vibration top plate 100 descends into the mold 110 and the vibration top plate 100 and the vibration lower plate 130 A second step of manufacturing the base layer 20 by pressure molding while the base layer composition is vibrated by; Fine aggregate, cement, water and fly ash are mixed to prepare a surface layer composition, wherein the fly ash is a photocatalytic material coated to have one or more components selected from the group consisting of TiO2, ZrO2, V2O3, WO3, CuO, and SrTiO3 A third step of manufacturing the surface layer composition; And after putting the surface layer composition on the upper portion of the base layer 20 molded inside the mold 110, the vibration top plate 100 descends into the mold 110 and vibrates with the vibration top plate 100. The fourth step of manufacturing the surface layer part 10 by pressure molding while the surface layer composition is vibrated by the lower plate 130; a method for manufacturing a high-strength beam and driveway block having fine dust reduction and air purification function is disclosed.

However, as the water permeable block of Patent Document 3 is sprayed or coated on the surface of the block, the photocatalyst coating surface is removed by automobiles or pedestrians as time passes, resulting in a problem that it is difficult to sustain the photocatalytic reaction effect. Although the photocatalyst is mixed with cement when manufacturing the surface layer composition, the curing time of the block is delayed due to the mixture of fly ash in the surface layer composition, and the demolding strength is weakened, resulting in a problem of reduced workability.

In order to solve the above problems, the present invention uses graphene or carbon nanotubes to increase the flexural strength and compressive strength, and uses photocatalysts to detect micro-dust-causing substances in the air and harmful components attached to concrete by photochemical reactions. A method of manufacturing a beam and driveway block with high durability and the ability to purify harmful components capable of reducing environmental pollution by manufacturing a block using a high-strength artificial aggregate that can be disassembled and removed in a surface layer mixture, and a beam manufactured using the same The purpose is to provide driveway blocks.

The method for manufacturing a beam-driven block having the ability to purify harmful components of the present invention includes: a method for manufacturing a beam-driven block comprising a base layer and a surface layer;

It is composed of 10 to 20 parts by weight of sand, 0.015 to 0.025 parts by weight of graphene or carbon nanotube powder, 5 to 15 parts by weight of photocatalyst powder, and 1 to 2 parts by weight of high-performance water reducing agent and crushed to a certain size with respect to 100 parts by weight of cement. Preparing an artificial aggregate;

Preparing a surface layer mixture by mixing 5 to 20 parts by weight of the high-strength artificial aggregate with 5 to 20 parts by weight of sand with respect to 100 parts by weight of cement;

Forming a surface layer portion on top of the base layer portion by introducing the surface layer portion mixture into the upper portion of the base layer portion formed by injecting a predetermined thickness into the molding frame;

It is characterized in that it is produced by curing after pressing the surface layer portion.

The present invention is a high-strength artificial aggregate capable of decomposing and removing nitrogen oxides (NOx), sulfur oxides (SOx), and odor gases, which are fine dust-inducing substances in the air by high photonic reaction of photocatalyst with high bending strength and compressive strength. Used in the mixture of the surface layer, the durability of the surface layer, which has a large contact area with the atmosphere, can last a long life of the block and can quickly purify a large amount of fine dust and harmful components, thereby reducing environmental pollution. have.

1 is a manufacturing process diagram of a beam and driveway block having the ability to purify harmful components according to the present invention.

The terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or lexical meanings, and the inventor can appropriately define the concept of terms in order to best describe his or her invention. Based on the principle that it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

The method for manufacturing a beam-driven block having the ability to purify harmful components of the present invention includes: a method for manufacturing a beam-driven block comprising a base layer and a surface layer;

It is composed of 10 to 20 parts by weight of sand, 0.015 to 0.025 parts by weight of graphene or carbon nanotube powder, 5 to 15 parts by weight of photocatalyst powder, and 1 to 2 parts by weight of high-performance water reducing agent and crushed to a certain size with respect to 100 parts by weight of cement. Preparing an artificial aggregate;

Preparing a surface layer mixture by mixing 5 to 20 parts by weight of the high-strength artificial aggregate with 5 to 20 parts by weight of sand with respect to 100 parts by weight of cement;

Forming a surface layer portion on top of the base layer portion by introducing the surface layer portion mixture into the upper portion of the base layer portion formed by injecting a predetermined thickness into the molding frame;

It is characterized in that it is produced by curing after pressing the surface layer portion.

Hereinafter, a method of manufacturing a beam and driveway block having the ability to purify harmful components of the present invention will be described in detail.

1. High-strength artificial aggregate preparation step (S10)

The high-strength artificial aggregate comprises 10 to 20 parts by weight of sand, 0.015 to 0.025 parts by weight of graphene or carbon nanotube powder, 5 to 15 parts by weight of photocatalytic powder, and 1 to 2 parts by weight of high-performance water reducing agent relative to 100 parts by weight of cement.

The cement uses ordinary portland cement, rough steel cement, super-hard steel cement, super-hard cement, and back cement for the purpose of enhancing strength and improving adhesion. Rough steel cement contains a little more lime and silicic acid components than ordinary portland cement. It is preferable to use crude steel cement as the main raw material since the initial hydration activity is high, and the powder strength is better than ordinary Portland cement, so it is hardened early, the strength is about 1.5 to 2 times higher, and the best in cost competitiveness. .

The super hard cement can express high strength in a shorter time and shorten the curing time significantly in the crude steel cement, but it is preferable to use it only when it is necessary to produce aggregate in a short period due to disadvantages in terms of cost.

The graphene is composed of hexagonal honeycomb arrangements in which carbon atoms are sp-bonded in two dimensions and is a semi-metallic material having an atomic layer thickness, which is not only structurally and chemically stable, but also has excellent mechanical properties and excellent electricity. It has the characteristics of a heat conductor. In addition, graphene powder has a very high specific surface area of 2,000 to 3,000 m / g, tensile strength of about 100 times that of iron, high airtightness to block hydrogen or helium elements, and is excellent in durability. In particular, by improving the bending and compressive strength and at the same time, the filler effect to fill the voids greatly improves durability such as flame retardancy, waterproofness, corrosion resistance, and abrasion resistance, so as to have all the functions to be equipped as general aggregates.

The carbon nanotubes are usually several to several tens of nanometers in diameter, and the difference is very large such that the ratio of diameter and length is 10 to 10,000, such as ranging from several micrometers to several tens of micrometers, and the inside is empty. As a long cylindrical carbon material, it has high mechanical strength, heat and electrical conductivity, and has a large specific surface area, making it a highly applicable material as an additive. Nanoparticles coated with CSH gel reduce the porosity of 50 nm or less while reducing the internal fineness of artificial aggregates. It functions to reduce cracks, slow the time of cracking, and increase the flexural strength and compressive strength.

As described above, the graphene and carbon nanotubes form a cement composition and a network by the net structure of the nano lattice, and through a filler effect to fill the voids, the flexural strength is improved by 60%, the compressive strength is improved by about 30%, and flame retardancy, waterproofness, The graphene or carbon nanotubes can be made of high-strength artificial aggregates with greatly improved durability such as corrosion resistance and abrasion resistance, but strength can be achieved even with a small amount of mixing. Is lowered, and when the strength exceeds 0.025 parts by weight, the effect of increasing the strength increases, but the workability becomes poor, and there is a problem that economic efficiency decreases. The graphene or carbon nanotube powder is added in an amount of 0.015 to 0.025 parts by weight based on 100 parts by weight of cement. It is preferred.

A photocatalyst is a substance that absorbs light and promotes a chemical reaction, and this reaction is called a photochemical reaction. The types of photocatalysts are zinc oxide (ZnO), titanium dioxide (TiO2), and tin oxide (SnO2), and these photocatalytics move electrons when they receive ultraviolet light during sunlight, and the generated electrons and electrons are oxygen in the surroundings. However, it reacts with hydrogen or OH in various ways, and the produced substances have strong oxidizing power, and the air purification ability to decompose and remove pollutants, nitrogen oxides (NOx), sulfur oxides (SOx), and odor gases in the atmosphere. It has the ability to reduce environmental pollution such as antifouling performance and antibacterial performance that can decompose and remove harmful substances attached to the surface of concrete products and structures, and in particular, titanium dioxide (TiO2) is the atmosphere and concrete Chemicals that oxidize and decompose contaminants attached to products and structures into substances that are harmless to the human body. It is known that it has phosphorus stability and is not addictive and does not contain carcinogens, unlike other photocatalytics.

Accordingly, the photocatalyst in the present invention uses titanium dioxide (TiO2), but uses one or a mixture of two or more of anatase and rutile. In general, titanium dioxide (TiO2) is anatase. And there are three types of rutile and brookite, and the brookite type is not used industrially and is known to have little photocatalytic effect.

In the case of anatase, it is widely used for photocatalysts as a white pigment, and is known to have the greatest oxidizing activity, and has a characteristic of changing to a rutile type at a high temperature of 900 ° C or higher, and in the case of rutile Since it is widely used industrially, such as a white pigment, titanium dioxide (TiO2) in the present invention is preferably used with an anatase (anatase) and rutile (rutile).

The photocatalyst powder is used in 5 to 15 parts by weight of titanium dioxide with respect to 100 parts by weight of cement, while the photocatalyst powder is properly mixed with cement, and contaminants and nitrogen oxides (NOx) are decomposed by photochemical reaction of titanium dioxide by ultraviolet rays in sunlight. It can be removed so that the high-strength artificial aggregate of the present invention can effectively clean the harmful components and air pollutants attached to the road and driveway blocks.

The photocatalyst powder has less harmful component purification effect when used in less than 5 parts by weight with respect to 100 parts by weight of cement, and when used in excess of 15 parts by weight, there is a problem of strength decrease of the artificial aggregate due to economic problems and durability, resulting in photocatalyst powder It is preferable to use 5 to 15 parts by weight based on 100 parts by weight of silver cement.

The high-performance water-reducing agent is a naphthalene-based or polycarboxylic acid-based, and plays a very important role in obtaining high strength by lowering the water-cement ratio of cement, and the high-performance water-reducing agent generally uses a lot of naphthalene-based. Rather, a polycarboxylic acid system having a high water cement susceptibility is effective.

When the amount of the high-performance water reducing agent is low, the fluidity is poor and the water cement is high, so high strength cannot be expected, and when the amount is high, the water reducing effect is not exhibited, and the curing delay is also exhibited. It is preferably used in 1 to 2 parts by weight.

10 to 20 parts by weight of sand with respect to 100 parts by weight of cement, 0.015 to 0.025 parts by weight of graphene or carbon nanotube powder, 5 to 15 parts by weight of photocatalyst powder, 1 to 2 parts by weight of high performance water reducing agent, 100 parts by weight of cement With respect to 1 to 5 parts by weight of the fine silica powder, 1 to 5 parts by weight of the expanding agent, 0.1 to 1 part by weight of the thickener is further added.

The silica fine powder is a high-quality pozzolanic material having potential hydraulic properties and improving surface durability of artificial aggregates, and is preferably used in an amount of 1 to 5 parts by weight with respect to the cement.

The swelling agent can be used alone or in combination of two or more calcium sulfaluminate, anhydrous gypsum, quicklime, cement powder, etc., and is used to prevent cracking and shrinkage by compacting the structure of the high-strength artificial aggregate composition.

The expansion agent is preferably used in an amount of 1 to 5 parts by weight with respect to cement. If the expansion agent is less than 1 part by weight, the effect of preventing cracking and shrinkage may be weak, and when it is 5 parts by weight or more, good curing properties and good physical properties due to expansion Although it can be obtained, there is a problem in that it is not economical due to high manufacturing cost. In particular, when the excess amount is used in the process, it may cause overexpansion, so the expansion agent is preferably used in an amount of 1 to 5 parts by weight with respect to cement.

Cellulose or polysaccharide-based thickener is used to increase the adhesive strength of cement, and when used in an amount of less than 0.1 parts by weight based on 100 parts by weight of cement, it is difficult to expect the effect, and when used in more than 1 part by weight As viscosity increases and fluidity decreases, it may cause difficulties in work, and therefore, the thickener is preferably used in an amount of 0.1 to 1 part by weight based on 100 parts by weight of cement.

High-strength artificial aggregate composition consisting of 10 to 20 parts by weight of sand, 0.015 to 0.025 parts by weight of graphene or carbon nanotube powder, 5 to 15 parts by weight of photocatalyst powder, and 1 to 2 parts by weight of high-performance water reducing agent as described above Or 10 to 20 parts by weight of sand relative to 100 parts by weight of cement, 0.015 to 0.025 parts by weight of graphene or carbon nanotube powder, 5 to 15 parts by weight of photocatalyst powder, 1 to 2 parts by weight of high performance water reducing agent compared to cement fine silica powder 1 to 5 The high-strength artificial aggregate composition in which 1 part by weight, 1-5 parts by weight of the expanding agent, and 0.1-1 part by weight of the thickener is further added to the mixer, and evenly mixed with a certain amount of water, put into a molding mold and pressurized to have a certain thickness and size. Steam is cured for 7 to 8 hours after molding into a block-shaped molding.

The artificial aggregate block that has undergone steam curing is subjected to a natural curing process for 3 to 7 days, and then crushed to a size of 0.5 to 5 mm in size using a crusher to prepare a high-strength artificial aggregate to be used as a raw material for a road and driveway block.

The artificial aggregate manufactured as described above not only provides high flexural strength and compressive strength, but also exerts an effect of decomposing and removing fine dust-inducing substances in the air and harmful components attached to concrete by photochemical reactions. When used as a material for the surface layer of a driveway block, the durability of the surface layer is enhanced, and the function of purifying pollutants such as nitrogen oxide (NOx) and sulfur oxide (SOx) is exerted to provide an effect of reducing environmental pollution. .

At this time, the high-strength artificial aggregate crushed to a size of 0.5 to 5 mm in size has a hard surface by carbon dioxide gas by adding a process of adding carbon dioxide gas after adding the crushed artificial aggregate to the drum-type reactor to harden and compact the surface. And it is possible to obtain a dense, high-strength artificial aggregate.

2. Surface layer mixture preparation step (S20)

The prepared high-strength artificial aggregate is mixed with cement and sand to prepare a surface layer mixture, and the surface layer mixture is cement, 5 to 20 parts by weight of the high-strength artificial aggregate, 5 to 20 parts by weight of sand, and a certain amount of water. Mix evenly to prepare.

Cement used in the surface layer mixture usually uses Portland cement, crude steel cement, ultra-hard steel cement, super-hard cement, back cement, etc. It is desirable to use early-hardened and most excellent crude steel cement as the main raw material in terms of cost competitiveness.

The high-strength artificial aggregate is used as 5 to 20 parts by weight of 100 parts by weight of cement by crushing aggregates of 0.5 to 5 mm, and the high-strength artificial aggregate is less water permeable due to excessive cement ratio when it is less than 5 parts by weight. It is difficult to obtain the photocatalytic reaction provided by high artificial aggregates, and if it is more than 20 parts by weight, strength decrease occurs due to the low cement ratio, so high strength artificial aggregates are mixed evenly with high strength artificial aggregates using 5 to 20 parts by weight per 100 parts by weight of cement. Prepare the surface layer mixture.

3. Surface layer forming step (S30)

The beam and driveway blocks of the present invention are composed of a base portion and a surface layer portion, and the base portion is formed by a composition and method used for forming a conventional beam and driveway block. Since the formation of the base portion is not the core technology of the present invention, the base portion is formed. A separate description is omitted in the method.

The base layer mixture prepared by the conventional method is introduced at a height of 70 to 80% in the beam and driveway block forming frame, and after curing of the base layer mixture, the surface layer mixture prepared above is added to the upper portion of the base layer.

After the mixture of the surface layer is added to the top of the base layer, the surface layer portion is uniformly compacted to the top of the base layer by applying a vibration force of 50 to 130 mm in amplitude and a vibration speed of 5,000 to 5,500 rpm to the mold for the improvement of internal density and strength. To form.

4. Surface layer pressurization and curing step (S40)

The surface layer part is pressurized on the upper surface with a press, and the upper surface is evenly surfaced, separated from the forming frame, and moved to a curing room for curing to perform steam curing for 7 to 8 hours.

The block that has undergone the steam curing process is naturally cured at room temperature for 5 to 10 days to complete the manufacture of a block of roads and roads with the ability to purify harmful components.

Hereinafter, an embodiment of a method for manufacturing a beam and driveway block having the ability to purify harmful components according to the present invention will be described.

[Example 1]

10 to 20 parts by weight of sand relative to 100 parts by weight of cement, 5 to 15 parts by weight of photocatalytic powder, 0.015 to 0.025 parts by weight of graphene powder, 1 to 2 parts by weight of high-performance water reducing agent, 1 to 5 parts by weight of fine silica powder, 1 to 5 parts of expanding material Add 0.1 to 1 part by weight of the thickener and thickener to the mixer and mix evenly by adding a certain amount of water.

The mixture of the above composition is evenly mixed into a molding mold and compressed into a block-shaped molding having a certain thickness and size, followed by steam curing for 7 to 8 hours and natural artificial block after steam curing for 3 to 7 days. Cure.

After the artificial aggregate block that has undergone the natural curing process is put in a crusher, it is crushed to a size of 0.5 to 5 mm to prepare a high-strength artificial aggregate.

Thereafter, 5 to 20 parts by weight of the high-strength artificial aggregate and 5 to 20 parts by weight of sand are gradually added to the mixer together with a certain amount of water, and evenly mixed to prepare a surface layer mixture.

Then, the base layer composition prepared in advance in the molding frame is introduced to a predetermined thickness to form the base portion, and then the mixture of the surface layer portion is introduced into the upper portion of the base layer, and vibration is applied to the molding frame to uniformly compact the surface layer portion.

After that, the upper surface of the surface layer is pressed with a press to evenly surface the upper surface of the surface layer, separated from the forming mold, and the separated blocks are moved to the curing room for 7-8 hours steam curing and natural curing at room temperature for 5-10 days. Through the process, the production of blocks even with the ability to purify harmful components is completed.

[Example 2]

10 to 20 parts by weight of sand relative to 100 parts by weight of cement, 5 to 15 parts by weight of photocatalytic powder, 0.015 to 0.025 parts by weight of carbon nanotube powder, 1 to 2 parts by weight of high-performance water reducing agent, 1 to 5 parts by weight of silica fine powder, 1 to 1 part of expanding material 5 parts by weight, 0.1 to 1 part by weight of a thickener is put in a mixer and a certain amount of water is added to mix evenly.

The mixture of the above composition is evenly mixed into a molding mold and compressed into a block-shaped molding having a certain thickness and size, followed by steam curing for 7 to 8 hours and natural artificial block after steam curing for 3 to 7 days. Cure.

After the artificial aggregate block that has undergone the natural curing process is put in a crusher, it is crushed to a size of 0.5 to 5 mm to prepare a high-strength artificial aggregate.

Thereafter, 5 to 20 parts by weight of the high-strength artificial aggregate and 5 to 20 parts by weight of sand are gradually added to the mixer together with a certain amount of water, and evenly mixed to prepare a surface layer mixture.

Then, the base layer composition prepared in advance in the molding frame is introduced to a predetermined thickness to form the base portion, and then the mixture of the surface layer portion is introduced into the upper portion of the base layer, and vibration is applied to the molding frame to uniformly compact the surface layer portion.

After that, the upper surface of the surface layer is pressed with a press to evenly surface the upper surface of the surface layer, separated from the forming frame, and the separated blocks are moved to the curing room for 7-8 hours steam curing and natural curing at room temperature for 5-10 days. Through the process, even the block with the ability to purify harmful components is completed.

[Example 3]

10 to 20 parts by weight of sand relative to 100 parts by weight of cement, 5 to 15 parts by weight of photocatalytic powder, 0.015 to 0.025 parts by weight of graphene powder, 1 to 2 parts by weight of high-performance water reducing agent, 1 to 5 parts by weight of fine silica powder, 1 to 5 parts of expanding material Add 0.1 to 1 part by weight of the thickener and thickener to the mixer and mix evenly by adding a certain amount of water.

The mixture of the above composition is evenly mixed into a molding mold and compressed into a block-shaped molding having a certain thickness and size, followed by steam curing for 7 to 8 hours and natural artificial block after steam curing for 3 to 7 days. Cure.

After the artificial aggregate block that has undergone the natural curing process is put in a crusher, it is crushed to a size of 0.5 to 5 mm, and the crushed aggregate is put into a drum-type reactor to harden and densify the surface of the aggregate, followed by carbon dioxide gas by introducing carbon dioxide gas. A high-strength artificial aggregate having a hard and dense surface is prepared.

Thereafter, 5 to 20 parts by weight of the high-strength artificial aggregate and 5 to 20 parts by weight of sand are gradually added to the mixer together with a certain amount of water, and evenly mixed to prepare a surface layer mixture.

Then, the base layer composition prepared in advance in the molding frame is introduced to a predetermined thickness to form the base portion, and then the mixture of the surface layer portion is introduced into the upper portion of the base layer, and vibration is applied to the molding frame to uniformly compact the surface layer portion.

After that, the upper surface of the surface layer is pressed with a press to evenly surface the upper surface of the surface layer, separated from the forming mold, and the separated blocks are moved to the curing room for 7-8 hours steam curing and natural curing at room temperature for 5-10 days. Through the process, the manufacture of a road and driveway block with the ability to purify harmful components is completed.

The beam and driveway blocks manufactured by the present invention have high bending strength and high compressive strength, and decompose and remove nitrogen oxides (NOx), sulfur oxides (SOx), and odor gases, which are fine dust-inducing substances in the atmosphere, by photochemical reactions of photocatalysts. By using a high-strength artificial aggregate with the ability to perform the surface layer mixture, the durability of the surface layer with a large contact area with the atmosphere is enhanced, thereby prolonging the life of the block for a long time while quickly purifying large amounts of fine dust and harmful components. It has the advantage of being able to effectively reduce environmental pollution.

Claims (5)

In the method for manufacturing a beam and driveway block consisting of a base layer portion and a surface layer portion,
10 to 20 parts by weight of sand with respect to 100 parts by weight of cement, 0.015 to 0.025 parts by weight of graphene, 5 to 15 parts by weight of photocatalyst powder, and 1 to 2 parts by weight of a high-performance water reducing agent to prepare a high-strength artificial aggregate crushed to a certain size Step S10;
Preparing a surface layer mixture by mixing 5 to 20 parts by weight of the high-strength artificial aggregate and 5 to 20 parts by weight of sand with respect to 100 parts by weight of cement (S20);
Forming a surface layer portion on top of the base layer portion by injecting the surface layer mixture into the upper portion of the base layer portion formed by injecting a predetermined thickness into the inside of the molding frame (S30);
It comprises a step (S40) for curing after pressing the surface layer portion,
In the artificial aggregate preparation step, the artificial aggregate is crushed to 0.5 to 5 mm, and then carbonic acid gas is added to prepare a high-strength artificial aggregate with a hard and dense surface, and a method for manufacturing a block of road blocks with harmful components. . The method according to claim 1,
In the artificial aggregate preparation step, the photocatalyst is titanium dioxide (TiO2),
The titanium dioxide (TiO2) is any one or a mixture of two or more of anatase (anatase) and rutile (rutile),
The cement is a normal portland cement or crude steel cement, characterized in that it is manufactured, characterized in that the manufacturing method of the beam, driveway block having a harmful component purification ability. The method according to claim 1,
In the artificial aggregate preparation step, 1 to 5 parts by weight of silica fine powder, more than 1 to 5 parts by weight of an expanding agent, and 0.1 to 1 part by weight of a thickener are added, compared to cement.
The expanding agent is any one selected from calcium sulfaluminate, anhydrous gypsum, quicklime, cement powder,
The thickener is a cellulose or polysaccharide-based method of manufacturing a block of roads and roads having the ability to purify harmful components, characterized in that it is produced. delete A walkway and driveway block manufactured by a method of manufacturing a walkway and driveway block having the ability to purify harmful substances according to any one of claims 1 to 3.

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