KR101852346B1 - Concrete composition for preparing eco-friendly block and eco-friendly block using thereof - Google Patents

Abstract

The present invention relates to a concrete composition for manufacturing an eco-friendly block and an eco-friendly block manufactured through the same, capable of being used as a revetment and retaining block, a paving block, and a safety block, which are installed to protect sidewalks and slopes of a river, coast, bank, or roadside; reducing the eruption of harmful substances such as an alkali component by minimizing the use of existing harmful cement; and reducing environmental pollution caused by industrial wastes and increasing the reuse of resources by mixing industrial byproducts as main ingredients. In proportion to 100 parts by weight of cement-based binder, the concrete composition of the present invention includes: 10-1000 parts by weight of aggregates; 10-70 parts by weight of copper slag; 1-10 parts by weight of water-soluble compound; and 10-50 parts by weight of filler which is selected from among silica, acrylic powder, and stone flour.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a concrete block for manufacturing an eco-friendly block and an eco-

The present invention relates to a concrete composition for manufacturing an eco-friendly block and an eco-friendly block using the eco-friendly block. More particularly, the present invention relates to a concrete block for building an eco-friendly block, It is possible to reduce the leaching of harmful substances such as alkaline substances by minimizing the use of existing harmful general cement, and at the same time, by using industrial by-products as main components, it is possible to increase the recyclability of resources, Friendly concrete block, and an eco-friendly block using the same.

In the manufacturing process of cement, it is pointed out as CO2 gas emission, large amount of energy consumption, dust, noise, and environmental pollution business of the ocean. It contains harmful substances to human body and causes atopy by cement toxicity. It is necessary to develop eco-friendly concrete products that can replace them. Studies are being conducted to solve these problems, but so far they have not achieved great results.

Generally, the concrete blocks for construction of the slip roads, which have been completed, are discharged to the sewage due to the loss of the water and drainage function due to the summer rainfall. This causes the soil to dry, the soil is lost and collapsed, There is a problem that the water circulation system collapses. As a result, functional permeable and impermeable blocks have been introduced and are being installed on many sites, but nevertheless they are still inadequate to address these problems.

Specifically, the permeable block is classified into a front permeable block and a hole (sphere permeable) permeable block in its structure and shape, and the front permeable block has a good initial water permeability effect, There is basically a little problem because there is no sustained pitching effect. In addition, the hole-permeable block has a problem in that a hole is formed in a portion of a cross-section and the portion is selectively inserted into a separate spacer (concrete component or HDPE material or the like) When the spacer is inserted, the construction is coarse, and it is uncomfortable to walk because it is shaky, and it is not visually good.

In addition, in general, the concrete block for roadway slippage is biased toward the visual and functional aspects without durability such as warping and tensile which is a disadvantage of concrete in the molding process. In addition, some urgent construction sites require concrete blocks to be delivered after 3 to 4 days in the curing process, and there are cracks in the cracks after the block construction and cracks at the interface. And the like. That is, the expression of the early strength of the block is also an important factor.

Conventionally, the use of Portland cement is not completely excluded. Conventional eco-friendly cement can not completely solve the hazardous problem, and durability such as bending strength and tensile strength is reduced, There is a problem in that it is difficult to expect continuous permeability effect when a block is manufactured.

1. Korean Registered Patent No. 10-1809611 (Title of invention: composition for eco-friendly high-strength press block using copper slag as industrial by-product, press block manufactured thereby and method for producing the same) 2. Korean Registered Patent No. 10-1258269 (Name of the invention: Concrete composition for manufacturing eco-friendly shore block, eco-friendly shore block using the same and method for producing the same)

The present invention has been developed in view of the circumstances of the prior art as described above, and it is an object of the present invention to minimize leaching of harmful components such as alkaline components by minimizing the amount of general cement used and to maintain the compressive strength similar to the compressive strength of conventional cement concrete It can strengthen the durability of the revetment block, and at the same time, it can protect the environment by preventing recycling of resources and second pollution caused by industrial byproducts by using industrial byproducts as main material, Friendly concrete block and an environmentally friendly block using the same.

In order to accomplish the above object, the present invention provides a cementitious mortar composition comprising, based on 100 parts by weight of a cementitious binder,

10 to 1,000 parts by weight of aggregate; 10 to 70 parts by weight of copper slag; 1 to 10 parts by weight of a water-soluble admixture; And 10 to 50 parts by weight of a filler selected from the group consisting of silica, acrylic powder, silica sand and talcum.

Meanwhile, the copper slag has a spherical shape and an acicular shape, and the spherical shape and the acicular shape are mixed at a weight ratio of 1: 1.5-3.

On the other hand, the copper slag uses copper slag with physical pressure applied thereto, and the physical pressure is selected from among vibration, milling, and blasting, and provides a concrete composition for manufacturing an eco-friendly block.

On the other hand, the water-soluble admixture is at least one selected from calcium chloride, potassium chloride, ferric chloride, magnesium oxide, ferrous sulfate, sodium chloride, magnesium chloride and ammonium chloride.

On the other hand, a surface portion integrally formed with the base to have a predetermined thickness is further formed on the base made of the concrete composition for manufacturing an eco-friendly block, wherein the surface portion is composed of 20 to 40 parts by weight of the aggregate based on 100 parts by weight of the cementitious binder, 1 to 5 parts by weight of an admixture, 2 to 10 parts by weight of an additive, and a surface part concrete composition.

The present invention also provides a concrete composition for manufacturing an eco-friendly block, which comprises 0.1 to 3 parts by weight of wheat gluten or corn gluten as a protein with respect to 100 parts by weight of the cement based binder.

The present invention provides a concrete composition for the production of an eco-friendly block, which comprises 0.1 to 5 parts by weight of powdery hydrolyzate obtained by culturing wheat gluten or corn gluten as a protein with 100 parts by weight of the cementitious binding material.

On the other hand, 100 parts by weight of the crushed fish by-products are mixed with citric acid, acetic acid or caustic soda in 3 to 10 parts by weight and hydrolyzed at 1 to 2 atm and 90 to 110 ° C for 2 to 3 hours, And 0.1 to 3 parts by weight of fish-derived by-products, based on 100 parts by weight of the cementitious binding material, is provided.

Meanwhile, the eco-friendly block manufactured by using the concrete composition for producing an eco-friendly block has a compressive strength of 21 MPa or more and a flexural strength of 5 MPa or more, and the eco-friendly block is a block stone block used for roads, sidewalks, parks, Can be used in press and revetment blocks and safety guiding blocks.

The concrete composition for manufacturing an eco-friendly block and the eco-friendly block using the same according to the present invention will now be described.

1. First, since the amount of the Portland cement used in the concrete composition for building block can be reduced to 50% or less compared with the conventional concrete composition, contamination of streams and the like can be reduced by leaching chrome or alkali components from rainwater.

2. In spite of reducing the amount of Portland cement used, the compressive strength, slump, and air amount can be kept similar or better than the existing Portland cement, so that the durability, acid resistance and workability of the revetment block can be kept good. .

3. By using industrial by-products such as copper slag as a pozzolanic material, it is possible to reduce manufacturing cost, increase resource recyclability of industrial by-products, and prevent environmental pollution due to industrial byproducts.

4. It is also effective in activating the eco-friendly environment due to rapid mobilization by supplying the nutrient source of the early organisms as it is applied to the vegetation shore block for biological growth and sanctification.

Hereinafter, the present invention will be described in detail.

The present invention relates to a cementitious binding material comprising 10 to 1,000 parts by weight of an aggregate; 10 to 70 parts by weight of copper slag; 1 to 10 parts by weight of a water-soluble admixture; And 10 to 50 parts by weight of a filler selected from the group consisting of silica, acrylic powder, silica sand and talcum.

The concrete composition for manufacturing an eco-friendly block according to the present invention is applied to all blocks including the use of a block for a revetment used for slopes such as a river, a shore, a bank, a road, and a sidewalk block installed for protecting a sidewalk.

The cement according to the present invention is not particularly limited as long as it is a cement conventionally used in the art, but it is preferable to use special Portland cement, blast furnace slag cement, ultra fine powder cement, and other special cements.

The preferable powder degree of the cement is preferably 3,200 to 6,500 cm 2 / g.

The content of the components other than cement in the concrete composition according to the present invention is based on 100 parts by weight of the cementitious binder.

The copper slag according to the present invention is advantageous not only in terms of environment in which the concrete composition, specifically the by-product which is contained in the environmentally friendly general concrete composition, is recycled, but also has high economic efficiency, and slag has a density higher than that of general natural aggregate 31 ~ 44%, and the unit volume weight of the aggregate is 23 ~ 32% higher than that of ordinary aggregate. Therefore, the durability and strength of the block are improved by utilizing the characteristics of compression strength and bending strength Compared with aggregates, cement and filler use can be reduced.

The amount of the copper slag to be used is preferably 10 to 70 parts by weight based on 100 parts by weight of the cementitious binder.

The particle type of the copper slag is a mixture of spherical and needle-shaped copper slag, wherein the spherical shape and the needle-like shape are mixed at a weight ratio of 1: 1.5 to 3.

The spherical copper slag is advantageous from the viewpoint of high slump and fluidity, but the coupling strength with the binder deteriorates, so that the compressive strength may be weakened. Therefore, a needle-like type, that is, a needle type having a square or irregular surface, The bonding strength with the binder is high and the compressive strength is increased.

In addition, when the copper slag having the spherical particles is subjected to physical pressure to deform the spherical particle surface into a scratch, angular or irregular shape, the coupling ability with the binder is improved, and furthermore, the spherical copper slag is mixed with the needle- And at the same time, it has the effect of improving the bonding ability with the binder and increasing the physical properties.

At this time, the physical pressure may be any one selected from vibration, milling, and blasting, and the physical pressure by the vibration may be 1: 1.5 to 1: 1.5 in the spherical copper slag and the needle-shaped copper slag having a particle size distribution of 0.3 to 5 mm ~ 3 weight ratio, and then oscillated by a diaphragm for a certain period of time to scratch the surface of the spherical particles due to friction between the surfaces.

Then, the physical pressure by the milling is put into a rotating mill mill, and the spherical particle surface is changed into a square or irregular shape through friction between each other for a certain period of time. The physical pressure by the blasting is sprayed by air pressure Spherical copper slag or mixed spherical and needle-shaped copper slag is injected at a speed of 50 m / s to collide with the impact plate to surface-modify the surface of the spherical copper slag particle into a square or amorphous needle-shaped surface, And the injection speed is preferably controlled to 10 to 70 m / sec.

The aggregate according to the present invention is a construction-use mineral material that can be consolidated into a lump by a binder such as concrete, and is chemically stable.

The aggregate refers to sand, gravel, basalt, osseite, bazaart, and the like, which are mixed with cement and water to produce concrete.

The aggregate may further include a basic rock carcass having a particle diameter of about 25 mm and an absorption rate of about 0.7% and / or bauxite having a particle diameter of about 5 mm and an absorption rate of 5.40%.

The aggregate having a size of 0.074 mm or more but less than 4.76 mm is called a fine aggregate, and a material having a diameter of 4.76 mm or more is called a coarse aggregate. Preferably, the amount of the aggregate to be used is 10 to 1,000 parts by weight based on 100 parts by weight of the cement based binder. The amount of the fine aggregate and the coarse aggregate contained in the aggregate is not particularly limited and can be appropriately adjusted according to the user's selection.

The water-soluble admixture is used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the cementitious binder. The water-soluble admixture is selected from the group consisting of calcium chloride, potassium chloride, ferric chloride, magnesium oxide, ferrous lactate, Ammonium is selected and used in order to improve durability while securing water permeability of the block and to improve the strength and unit volume weight of the block and to show that the general cement binder has a pH of 13 or more and exhibits strong alkalinity, If the pH of the binder is lowered to 10 or lower by adding a water-soluble admixture having a pH of 3 to 4, if the pH of the block is lowered, the revetment block is advantageous for plant growth. Therefore, A concrete composition will be realized.

The filler may be used in an amount of 10 to 50 parts by weight based on 100 parts by weight of the cement based binder. The filler may be one or more selected from among silica, acrylic powder, silica sand and talcum.

In addition, the concrete composition for producing an eco-friendly block according to the present invention may further contain additives such as a reducing agent, a pigment, an antifoaming agent, a dispersant, a surfactant, an antioxidant, a flow inhibitor or an additive comprising at least two mixtures selected from these .

The amount of the depressants, pigments, antifoaming agents, dispersants, surfactants, antioxidants and / or flow inhibitors used as the additives is preferably those conventionally used in the art, and the amount of the additives is preferably 100 parts by weight 1 to 15 parts by weight is preferably used.

For example, the depressant may be one selected from the group consisting of trimeric acid ester, benzoic acid ester, ethylcyclohexane and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate.

The pigment is used to add color to the concrete composition to be applied, and any pigment conventionally used in the art having such a purpose may be used.

As the preferable pigment, it is preferable to use an inorganic pigment and / or an organic pigment.

The inorganic pigment includes iron oxide, iron hydroxide, chromium oxide, titanium oxide, or a mixture thereof, wherein iron oxide and iron hydroxide show a reddish brown color, chromium oxide indicates green, and titanium oxide indicates white.

The organic pigment may be a carbon black, an azo pigment, or a mixture thereof. The dispersant is not particularly limited as long as it is a dispersant commonly used in the art, but is preferably a nonionic, anionic, and / or cationic It is preferable to use a dispersant.

In addition, the concrete composition for eco-friendly block production of the present invention may be a whey gluten or a corn gluten protein source in a concrete composition when it is used as a block for vegetable shore protection, wherein the protein source is cultured by a strain, In the concrete composition for the production of an eco-friendly block of the present invention, the protein source of wheat gluten or corn gluten or the protein source thereof may be hydrolyzed in order to accelerate the initial biological growth and to grow and activate an aquatic organism. Wherein the protein source is mixed in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of the cement based binder, and the hydrolyzed hydrolyzate of the protein source is used in an amount of 0.1 to 5 parts by weight Lt; / RTI >

If the content of the protein source or the hydrolyzate is less than 0.1 part by weight, nutrient supply to the initial bio-growth is insufficient. If the content of the protein source or the hydrolyzate exceeds the maximum content, nutrients can be supplied to the initial bio- And the durability is deteriorated.

In addition, when the concrete composition for producing an eco-friendly block of the present invention is produced by crushing the fish by-product, which is a by-product of bones, shells, By weight of citric acid, acetic acid or caustic soda in 3 to 10 parts by weight, and hydrolyzing the mixture at 1 to 2 atm and 90 to 110 ° C for 2 to 3 hours. At this time, 0.1 to 3 parts by weight of the by-product of hydrolysis of the cement-based binding material and 100 parts by weight of the cement-based binder may be mixed with the concrete composition.

If a block produced by the above-described method is used for a revetment block and a sidewalk block, it is possible to manufacture a sidewalk block having excellent surface processability, The surface portion may comprise 20 to 40 parts by weight of the aggregate, 1 to 5 parts by weight of the water-soluble admixture and 2 to 10 parts by weight of the additive, based on 100 parts by weight of the cementitious binder, The present invention further provides a surface side concrete composition comprising

In the produced eco-friendly block, the thickness of the surface portion is formed to be smaller than the thickness of the base.

[Example] Evaluation of physical properties of block according to the type of copper slag added

In Example 1, a concrete composition was prepared by mixing 100 g of Portland cement, 300 g of coarse aggregate, 50 g of copper slag, 2 g of a water-soluble admixture (calcium chloride) and 20 g of a filler (silica), and the copper slag, Respectively.

Example 2 was prepared in the same manner as in Example 1, except that needle-shaped copper slag was used.

Example 3 was formulated in the same manner as in Example 1 except that the weight ratio of spherical to needle-shaped copper slag was used as 1: 2.

Example 4 was prepared in the same manner as in Example 1 except that copper spherical copper slag, which had been surface-modified by physical pressure by vibration, was mixed with acicular and 1: 2 by weight ratio.

Example 5 was prepared by mixing the copper slag in which the spherical copper slag was surface-nitrided by the physical pressure by milling in a weight ratio of 1: 2 with the acicular type.

Example 6 was prepared in the same manner as in Example 1 except that the copper slag, which had been surface-modified with physical pressure by blasting, at a spraying speed of 40 m / sec, was mixed with the acicular type at a weight ratio of 1: 2 Respectively.

Table 1 shows the results of the physical properties of the concrete after mixing the concrete with the above composition.

division Compressive strength
(MPa) Flexural strength
(MPa) Porosity
(%) Permeability coefficient
(mm / sec) Example 1 18.20 5.11 15.50 1.15 Example 2 19.45 6.02 16.21 1.30 Example 3 19.40 5.95 16.30 1.30 Example 4 19.62 6.20 16.45 1.48 Example 5 19.50 6.15 16.40 1.45 Example 6 19.87 6.80 16.80 1.50

The compressive strength shown in Table 1 is an average value after measurement according to KS F 2405 "Compressive Strength Test Method of Concrete" after specimen fabrication at an age of 28 days. In Examples 1 to 6 including the copper slag, When the copper slag was used, the compressive strength was remarkably high. This is because when the copper slag with physical pressure applied by blasting is used, the adhesion and bonding with the binder improves, which not only significantly increases the hardness of the block but also increases the compressive strength of the block specimen by decreasing the water absorption rate and the wear rate.

Also, it was found that the dynamic stability was significantly increased when copper slag with physical pressure was applied by blasting. This increases the binding force and tensile strength of the block structure due to the ability of the copper slag and the binder to be evenly dispersed and prevents the aggregate separation and paste disintegration due to freezing and melting, Dispersibility and bonding strength between each other.

The eco-friendly block according to the present invention is manufactured from the concrete composition for eco-friendly block production of the present invention described above. In the eco-friendly block production method according to the present invention, the concrete composition for eco- And the size and shape of the environmentally friendly block can be freely determined as needed.

In the method of manufacturing an eco-friendly block having an integral structure composed of the upper layer surface portion and the lower layer base, the concrete composition for manufacturing an eco-friendly block constituting the base is put into a mold for manufacturing an eco- The sub-concrete composition is put into a predetermined thickness, followed by compaction, followed by compression molding, demolding and curing processes, and then the surface block of the block is polished to manufacture a sidewalk block.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are all illustrative and not restrictive. The scope of the present invention should be construed as being included in the scope of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.

Claims (10)

Based on 100 parts by weight of the cementitious binder,
10 to 1,000 parts by weight of aggregate;
10 to 70 parts by weight of a copper slag mixed with spherical and needle-like particles in a granular form and spherical and needle-like in a weight ratio of 1: 1.5 to 3;
1 to 10 parts by weight of a water-soluble admixture; And
And 10 to 50 parts by weight of a filler selected from silica, acrylic powder, silica sand, and talc. delete The concrete composition for manufacturing an eco-friendly block according to claim 1, wherein the copper slag uses copper slag with physical pressure applied thereto, and the physical pressure is selected from vibration, milling, and blasting. The concrete composition according to claim 1, wherein the water-soluble admixture is at least one selected from calcium chloride, potassium chloride, ferric chloride, magnesium oxide, ferrous sulfate, sodium chloride, magnesium chloride and ammonium chloride. The cementitious binder according to claim 1, further comprising a surface portion integrally formed with the base at a predetermined thickness on an upper portion of the base produced by the concrete composition of claim 1, wherein the surface portion comprises 20 to 40 wt% 1 to 5 parts by weight of a water-soluble admixture, and 2 to 10 parts by weight of an additive, based on 100 parts by weight of the total amount of the composition. The concrete composition for manufacturing an eco-friendly block according to claim 1, wherein 0.1 to 3 parts by weight of wheat gluten or corn gluten as a protein is included in 100 parts by weight of the cement based binder. The method according to claim 1, wherein 0.1 to 5 parts by weight of the powdery hydrolyzate hydrolyzed by high pressure is cultured by culturing wheat gluten or corn gluten as a protein with 100 parts by weight of the cementitious binding material. A concrete composition for making blocks. The method according to claim 1, wherein 100 parts by weight of the crushed fish by-products are mixed with citric acid, acetic acid or caustic soda in 3 to 10 parts by weight, hydrolyzed at 1 to 2 atm and 90 to 110 캜 for 2 to 3 hours, And 0.1 to 3 parts by weight of a fish by-product obtained by drying and fractionating the cement-based binding material, based on 100 parts by weight of the cement based binder. 9. An eco-friendly block produced by any one of claims 1, 4, or 6 to 8 and having a compressive strength of at least 21 MPa and a flexural strength of at least 5 MPa. 10. The eco-friendly block according to claim 9, wherein the eco-friendly block is used for a barrier block, a sidewalk, a revetment block or a safety guide block used in a driveway, a sidewalk, a park, a parking lot, a river, a coast or a bank.