KR101380856B1 - Method for Producing Lightweight Construction Material Using Waste and Lightweight Construction Material Produced Thereby - Google Patents

Abstract

The present invention relates to a method for manufacturing lightweight building materials using waste and light weight building materials manufactured therefrom, and more particularly, sewage sludge, ready-mixed concrete sludge, waste foundry sand, power plant ash, incineration residues, abrasive stone residues, waste asbestos, steel mills. The present invention relates to a method for manufacturing lightweight building materials using waste such as dust, and to lightweight building materials manufactured therefrom.
The method of manufacturing the lightweight building material includes (a) adding at least one kind of waste selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos, and power plant material to sewage sludge to prepare a waste mixture or incineration residues and abrasive stone residues into ready-mixed sludge. Preparing a waste mixture by mixing at least one type of waste selected from the group consisting of waste foundry sand, waste asbestos, steel mill dust and power plant ash; (b) adding an additive selected from the group consisting of feldspar, bentonite, zeolite, loess, mica and feldspar to the waste mixture, and then mixing to prepare a mixture containing the additive; (c) forming a mixture by molding the mixture containing the additive; And (d) firing the molded product in a firing furnace to produce a lightweight building material.

Description

Method for manufacturing lightweight construction materials using waste and lightweight construction materials manufactured therefrom {Method for Producing Lightweight Construction Material Using Waste and Lightweight Construction Material Produced Thereby}

The present invention relates to a method for manufacturing lightweight building materials using waste and light weight building materials manufactured therefrom, and more particularly, sewage sludge, ready-mixed concrete sludge, waste foundry sand, power plant ash, incineration residues, abrasive stone residues, waste asbestos, steel mills. The present invention relates to a method for manufacturing lightweight building materials using waste such as dust, and to lightweight building materials manufactured therefrom.

In general, sludge and non-organic residues from water purification plants, sewage treatment plants, factories, or incinerators are classified as waste and disposed of in a designated manner through collection.

As a method for treating such wastes, carbonization, solidification, maturation, incineration of wastes, use of cement as raw materials, and thermal power generation fuels have been attempted.

Carbonization is a method in which waste is put in a kiln combustion chamber and heat is applied so that the temperature of the combustion chamber is 700 to 1200 ° C., which does not cause odor, but because carbonized solid waste is generated, there is a problem of embedding it.

Solidification is a method of adding a solidifying agent to a sludge with a water content of 80 to 83% and then burying or recycling it.When the sludge treated with the solidifying agent passes for about one year or more, the organic matter of the sludge is decomposed and gas is released. Leaching into the soil due to the problem of solidifying agent or sludge particles, there is a problem that causes the acidification of the soil due to the acidic component when it rains.

The maturation is a method of using sludge as compost, but the plant grows well in the beginning, but as time passes, soil is contaminated with heavy metals, so that the plants contain heavy metals or the growth of plants is inhibited.

Incineration requires a lot of facility and investment costs, but there are a lot of failures due to the rapid corrosion of the incineration machine is difficult to operate continuously, there is a problem that dioxin is generated during incineration.

When the sludge is used as a cement raw material, the building material contains a large amount of heavy metals to cause harm to the human body, and there is a problem of mass producing wastes such as another inorganic material during cement production.

Finally, when using sludge as a thermal power fuel, the sludge should be dried first, and dioxin and odor are induced, and there is a problem in that electricity production efficiency is lower than when using anthracite or bituminous coal.

To solve these problems, sludge has been recycled. In order to recycle the sludge, it is necessary to treat the heavy metals contained in the sludge, to be economical in recycling, and to have functionality in the recycled product.

Korean Patent No. 10-0859002 proposed a method for producing artificial lightweight aggregate by crushing sewage sludge, coal fly ash and clay to 1 mm or less and then molding and firing at 1100 ° C to 1200 ° C for 10 to 15 minutes. In Korean Patent No. 10-0450898, sewage sludge in a dehydrated cake state is first dried and pulverized for 24 hours, mixed with clay, silica sand, gypsum, and blast furnace slag powder to be molded, secondary dried, and processed at 900 ° C to 1100 ° C. Various methods have been proposed in many patents, such as suggesting a method for manufacturing a fired building material through a time firing process. These inventions have no effect of dissolution of heavy metals and have the effect of producing lightweight aggregates. It is difficult to diversify the product, and the product using the residue after incineration had a weak strength.

The present inventors add a feldspar, bentonite, zeolite, ocher, mica and feldspar to sewage sludge wastes to solve the above problems, the method of manufacturing lightweight building materials using sludge wastes, characterized in that the molding and firing (application number: 10-2009-0123481).

In addition, the present inventors mix wastes such as ready-mixed sludge, waste foundry sand, power plant ash, and asbestos into sewage sludge, or add waste additives such as incineration residues, abrasive stone residues, waste foundry sand, power plant ash, and steel mill dust, etc. In addition, when forming and firing, the strength, permeability and non-flammability of the light weight building material can be further increased, and it can be confirmed that a light weight building material of appropriate color can be manufactured without using a separate pigment. The present invention has been completed.

An object of the present invention is to provide a method for recycling waste such as sewage sludge, ready-mixed sludge, waste foundry sand, power plant ash, incineration residues, abrasive stone residues, waste asbestos.

Another object of the present invention is to provide a method for manufacturing a lightweight building material having excellent strength and permeability by recycling waste and a lightweight building material manufactured therefrom.

In order to achieve the above object, the present invention comprises the steps of (a) to produce a waste mixture by adding at least one type of waste selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos and power plant ash; (b) adding an additive selected from the group consisting of feldspar, bentonite, zeolite, loess, mica and feldspar to the waste mixture, and then mixing to prepare a mixture containing the additive; (c) forming a mixture by molding the mixture containing the additive; And (d) firing the molded product in a sintering furnace to produce a light weight building material, and a light weight building material manufactured by the method.

The present invention also provides a method for preparing a waste mixture comprising: (a) mixing at least one waste material selected from the group consisting of incineration residue, abrasive stone residue, waste foundry sand, waste asbestos, steel mill dust and power plant ash in ready-mixed concrete sludge; (b) adding an additive comprising feldspar, bentonite, zeolite, loess, mica and feldspar to the waste mixture, and then mixing to prepare a mixture containing the additive; (c) forming a mixture by molding the mixture containing the additive; And (d) firing the molded product in a kiln to produce a lightweight building material, and a method of manufacturing a lightweight building material using waste and a lightweight building material manufactured by the above method .

According to the present invention, waste such as sewage sludge, ready-mixed sludge, waste foundry sand, power plant ash, incineration residue, abrasive stone residue, waste asbestos, steel mill dust, etc. can be recycled as a lightweight building material having excellent strength, permeability, and nonflammability.

1 is a manufacturing process diagram of a lightweight building material using waste according to an embodiment of the present invention.

In the present invention, when the additive is added to the waste selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos and power plant ash, and when molding and firing, the waste is recycled and at the same time lightweight, excellent in strength, permeability and non-combustibility We wanted to confirm that we can manufacture building materials.

In the present invention, to prepare a waste mixture in which sewage sludge, waste foundry sand, and power plant ash are mixed into sewage sludge, and after adding an additive including feldspar, bentonite, zeolite, ocher, mica and feldspar, it is molded into a press, and is 1100. By firing at ~ 1200 ℃ to produce a lightweight building material permeable sidewalk block and lightweight panel. As a result of evaluating the properties of the prepared permeable sidewalk block and lightweight panel, it was confirmed that the sidewalk block has excellent permeability and strength, and the lightweight panel has excellent strength and nonflammability.

Therefore, in one aspect, the present invention comprises the steps of: (a) adding a waste material selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos and power plant ash to sewage sludge to prepare a waste mixture; (b) adding an additive comprising feldspar, bentonite, zeolite, loess, mica and feldspar to the waste mixture, and then mixing to prepare a mixture containing the additive; (c) forming a mixture by molding the mixture containing the additive; And (d) firing the molded product in a sintering furnace to produce a light weight building material, and a light weight building material manufactured by the method.

1 is a manufacturing process diagram of a lightweight building material using waste according to an embodiment of the present invention.

Sewage sludge used in the present invention includes those produced by filtration and precipitation of raw water introduced from a water intake pipe and a water well as well as materials obtained in various stages of the sewage treatment process. Since sewage sludge contains organic matter and its water content is high, until now, the sewage sludge is stabilized by anaerobic treatment, then dehydrated and landfilled, or by water dumping or pumping ( After treatment with water treatment, it was sent to sea for treatment. However, the landfilling method has difficulty in securing landfills due to the increase of sewage sludge, and the method of throwing it into the sea has a disadvantage in that the processing process is difficult and the possibility of environmental pollution cannot be completely excluded.

The sewage sludge is collected in the form of cake sludge having a water content of about 70 to 80%, stored in a sludge storage tank, and mixed with other waste via a feeder to prepare a waste mixture. The waste may be selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos and power plant ash.

In the present invention, the ready-mixed concrete sludge is a waste produced during the production of concrete, which is a mixture of cement, sand, gravel, aggregate, and the like, which is kneaded in water, and is an alkaline composite inorganic material. Ready-mixed sludge can save fuel due to its high strength, low firing temperature, and dark color, so that building materials can be manufactured without using a separate black pigment.

The waste foundry sand is a sand remaining after casting, and most of the quartz particles (silica sand; quartz grain sand containing SiO 2 component) contain a small amount of feldspar and clay. When the waste foundry sand is used in manufacturing building materials, the strength can be improved.

The asbestos is generated from building materials, fireproofing materials, electrical insulation materials, and the like. Asbestos, a hydrous silicate mineral with a high magnesium content, is widely used as a building material. It has been found to be a substance that can cause malignant tumors in the pulmonary disease, pleura or pleura. The asbestos is formed by decomposition of specific gravity 2.5-2, tensile strength of about 13g / d, serpentine (암), hornblende (角閃石) and has magnesium silicate, calcium as a main component. Examples of the asbestos include white asbestos, brown asbestos, blue asbestos, tremonite, actinite, and ansopilite. When the waste asbestos is used in the manufacture of building materials, it is possible to reduce the weight of the product and improve the non-combustibility, water permeability and strength.

The plant ash contains iron as waste generated from the use of bituminous coal, anthracite coal and mixtures thereof as fuel in the power plant.

When the power plant material is used in manufacturing building materials, it is possible to reduce the weight of the product and improve the strength.

The amount of the waste added to the sewage sludge may be appropriately adjusted according to the type and number of wastes added, but it is preferable to add 10 to 100 parts by weight with respect to 100 parts by weight of sewage sludge. If the waste is added less than 10 parts by weight, the weight can not be achieved, if more than 100 parts by weight, the strength of the product is weakened, there is a problem that the organic component is burned to produce a product that meets the specifications. .

Once the waste mixture is prepared, an additive selected from the group consisting of feldspar, bentonite, zeolite, loess, mica and feldspar is added to the waste mixture and then mixed to prepare a mixture containing the additive. The additive may be selectively used according to the characteristics of the building material to be produced.

Feldspar is an aluminum silicate mineral, has a Mohs hardness of 6, specific gravity of 2 to 2.7, and splitting in two directions of 90 °, and is known to have white, gray, or dark brown color. When feldspar is added to the waste mixture, the strength and strength of the building materials are improved, and the firing temperature is lowered, thereby saving energy.

Bentonite is a clay mineral formed by the alteration of fine glassy particles derived from volcanic ash, and means a clay mainly containing montmorillonite, a mineral belonging to a monoclinic system having a mica-like crystal structure. When bentonite is added to the waste mixture, the viscosity of building materials can be improved.

The zeolite is a generic term for minerals that are aluminum silicate hydrates of alkali and alkaline earth metals, and can be used without limitation as long as it has a structure in which tetrahedrons of (Si, Al) O ₄ are bonded in a three-dimensional network. . When the zeolite, which is a porous material, is added to the waste mixture, the building material can be reduced in weight, the permeability can be improved, and the odor of the waste can be removed.

Loess is a sediment consisting mainly of particles having a silt size of 0.002 to 0.005 mm in diameter. The loess is yellowish brown and is not well weathered, and is mainly known to be quartz, and contains calcite and hornblende. have. When the ocher is added to the waste mixture, the strength can be improved due to the excellent sintering property, the far-infrared emission effect and the deodorizing effect can be obtained, and the firing temperature can be lowered, thereby saving energy.

Mica is an important coarse mineral in granite, and is a layered silicate mineral. The hardness is 2.5-4, specific gravity 2.75-3.2, and yellow, brown, and green. In addition, it contains about 2.82ppm of germanium (Ge), which is known to have a high spectral distribution of far infrared rays, which is beneficial to the human body. When mica is added to the waste mixture, deodorization and antimicrobial effects can be obtained, and the viscosity at the time of molding is improved, and there is no sand so that there is an effect of reducing mechanical wear. In the present invention, the mica includes both mica lobes, mica pieces, iridium mica, and the like.

The pyrophyllite (Agalmatolite) has the general formula _{Al 2 O 3 · 4SiO 2 ·} H 2 O as the mineral (theoretical content _{ratio: 5% Al 2 O 3:} 28.3%, SiO 2:: 66.7%, H 2 O) It has various colors from white to green, specific gravity of 2.7-2.9, and hardness of 1-2. When feldspar is added to the waste mixture, it induces a pozzolanic reaction with water to give strength to building materials, improve water resistance and corrosion resistance, and improve sound absorption or water permeability.

The additive is 10 to 35 parts by weight of feldspar, 10 to 30 parts by weight of bentonite, 10 to 60 parts by weight of zeolite, 15 to 60 parts by weight of ocher, 15 to 60 parts by weight of mica and 5 to 25 parts by weight of the waste mixture. It can be used by adding a weight part.

If the additive is used less than the content, the desired effect can not be obtained, and if it is used more than the content it is economically undesirable.

The mixture containing the additives is made into moldings in the molding machine via a bucket elevator, a large-sized dispensing conveyor, and a small dispensing cycle. Although the formation can be carried out in a conventional manner, it is preferable to pressurize at a pressure of 500 to 1500 tons using a dry press.

The molded product is transferred to a kiln through a refractory plate trolley system and then fired in a kiln to be manufactured as a lightweight building material.

The firing process may be carried out for 3 to 5 hours at a temperature of 1100 ~ 1200 ℃ by a conventional firing method, such as tunnel kiln, a kiln kiln. If the firing temperature is less than 1100 ℃ there is a fear that the strength of the lightweight building material is lowered, and if it exceeds 1200 ℃ there is a fear that the water permeability is lowered.

In particular, when the firing temperature is 1100 ~ 1145 ℃, the building material for permeability is manufactured, if the 1150 ~ 1200 ℃, non-combustible and sound-absorbing building materials can be produced. The permeable building material may include a walkway block for permeability, and the non-combustible and sound-absorbing building material may include a lightweight panel, a light brick, a lightweight aggregate, and the like.

In general, when the firing temperature is less than the reference temperature based on 1145 ~ 1150 ℃ pores are formed in the product, if the above the reference temperature is because the pores are melted and the volume is increased. In the firing step, the organic harmful components are oxidized, and the inorganic harmful components are physically changed into harmless components in the process of being mixed with the additive and magnetized.

The manufactured lightweight building materials are cut with a cutter, then packed in an automatic packing machine via a conveyor, then transported to pallets and stored in the product warehouse.

On the other hand, in the present invention, the waste selected from the group consisting of incineration residue, abrasive stone residue, waste foundry sand, waste asbestos, steel mill dust and power plant ash to ready-mixed concrete sludge is added to the additive further, when recycling and molding, the waste is recycled At the same time, it was to confirm that the lightweight building materials with excellent strength, permeability and non-combustibility can be manufactured. When using ready-mixed sludge instead of sewage sludge, the strength of the product can be further improved, and since the color is dark, there is an advantage of not using a separate black pigment.

In the present invention, a waste mixture of incineration residue, abrasive stone residue, waste foundry sand, waste asbestos, steel mill dust and power plant ash is prepared in ready-mixed concrete sludge, and additives containing feldspar, bentonite, zeolite, ocher, mica and feldspar are added. Then, it was molded in a press and fired at 1100 ~ 1200 ° C. to produce a pitched walkway block and a lightweight panel which are lightweight building materials. As a result of evaluating the physical properties of the manufactured permeable sidewalk block and lightweight panel, it was confirmed that the sidewalk block has excellent permeability and strength, and the lightweight panel has excellent strength and nonflammability.

Therefore, in another aspect, the present invention provides a method for preparing a waste mixture by mixing at least one type of waste selected from the group consisting of incineration residue, abrasive stone residue, waste foundry sand, waste asbestos, steel mill dust, and power plant ash in ready-mixed concrete sludge ; (b) adding an additive comprising feldspar, bentonite, zeolite, loess, mica and feldspar to the waste mixture, and then mixing to prepare a mixture containing the additive; (c) forming a mixture by molding the mixture containing the additive; And (d) firing the molded product in a sintering furnace to produce a light weight building material, and a light weight building material manufactured by the method.

The ready-mixed concrete sludge is a waste produced when concrete is mixed with cement, sand and gravel, aggregate, and kneaded in water, and is an alkaline composite inorganic material. When using ready-mixed concrete sludge, the firing temperature can be lowered to save fuel, improve strength, and because the color is dark, the building material can be manufactured without using a separate black pigment.

The incineration residues are residues generated during incineration at domestic waste incinerators, and about 20 to 30% of the incineration residues remain as residues. Household waste incinerators generally incinerate flammable wastes, except for large-sized wastes such as reusable and rehabilitation items that are collected and separated from household wastes, waste furniture and household appliances, and food waste for feed and compost. Since it is incinerated, it is composed of inorganic matter. When using the incineration residues in the manufacture of building materials, there is an advantage that can reduce the weight of the product in addition to waste recycling.

The abrasive stone residue is powder generated when the surface of metal or the like is polished smoothly, or abrasive stone waste remaining after use, and contains silicon dioxide (SiO ₂ ) as a main component. When the abrasive stone residue is used in manufacturing building materials, it has the advantage of being lightweight while having excellent strength.

The steel mill dust is a solid fine particle generated in an iron mill that extracts iron from iron ore to produce iron, such as steel sheets and steel pipes, and may collect the dust collected in a steel mill dust collector. The steel mill dust can be used as long as the dust generated in the steel mill, and contains a component such as iron, sulfur as a main component. When steel mill dust is used in the manufacture of building materials, it has an iron component, so that the strength of the product can be improved, and sintering is performed well even at low temperatures, which has the advantage of reducing fuel during firing.

The waste foundry sand and waste asbestos are the same as described above.

The amount of the waste added to the cement sludge may be appropriately adjusted according to the type and number of wastes added, but it is preferable to add 10 to 65 parts by weight based on 100 parts by weight of the cement sludge. If the waste is added in less than 10 parts by weight or in excess of 65 parts by weight may cause cracks in the product.

Once the waste mixture is prepared, an additive selected from the group consisting of feldspar, bentonite, zeolite, loess, mica and feldspar is added to the waste mixture and then mixed to prepare a mixture containing the additive. The additive may be selectively used according to the characteristics of the building material to be produced.

The additive is 10 to 35 parts by weight of feldspar, 10 to 30 parts by weight of bentonite, 10 to 60 parts by weight of zeolite, 15 to 60 parts by weight of ocher, 15 to 60 parts by weight of mica and 5 to 25 parts by weight of the waste mixture. It can be used by adding a weight part.

If the additive is used less than the content, the desired effect can not be obtained, and if it is used more than the content it is economically undesirable.

The mixture containing the additives is made into moldings in the molding machine via a bucket elevator, a large-sized dispensing conveyor, and a small dispensing cycle. Although the formation can be carried out in a conventional manner, it is preferable to pressurize at a pressure of 500 to 1500 tons using a dry press.

The molded product is transferred to a kiln through a refractory plate trolley system and then fired in a kiln to be manufactured as a lightweight building material.

The firing process may be carried out for 3 to 5 hours at a temperature of 1100 ~ 1200 ℃ by a conventional firing method, such as tunnel kiln, a kiln kiln. If the firing temperature is less than 1100 ℃ there is a fear that the strength of the lightweight building material is lowered, and if it exceeds 1200 ℃ there is a fear that the water permeability is lowered.

In particular, when the firing temperature is 1100 ~ 1145 ℃, the building material for permeability is manufactured, if the 1150 ~ 1200 ℃, non-combustible and sound-absorbing building materials can be produced. The permeable building material may include a walkway block for permeability, and the non-combustible and sound-absorbing building material may include a lightweight panel, a light brick, a lightweight aggregate, and the like.

In general, when the firing temperature is less than the reference temperature based on 1145 ~ 1150 ° C pores are formed in the product, if the above the reference temperature is because the pores are melted to increase the volume, magnetization flows to prevent the pores.

The manufactured lightweight building materials are cut with a cutter, then packed in an automatic packing machine via a conveyor, then transported to pallets and stored in the product warehouse.

Since the present invention uses sewage sludge or ready-mixed sludge having a water content of 70 to 80%, it does not use separate water when mixing with other wastes and additives, and thus does not generate waste water, and does not undergo drying after mixing molding and firing. It characterized in that to perform.

Water is required in the molding process of a typical building material, but if it is fired without undergoing a drying process, there is a problem that cracks are generated in the product by ejecting the remaining moisture, and generally after finishing the firing process. If it cools, it creates a crack in the product and needs to cool down slowly for 10 to 24 hours, which makes it difficult to mass-produce the product. However, the building material of the present invention has the advantage that by forming the pores while the organic gas and moisture is ejected, firing without drying, or even after cooling immediately after the firing process does not cause cracks in the product.

[Example]

Hereinafter, the present invention will be described in more detail by way of examples. It is to be understood by those skilled in the art that these embodiments are for further illustrating the present invention and that the scope of the present invention is not limited to these embodiments.

Examples 1 to 16: manufacturing method of lightweight building materials using sewage sludge

As shown in Table 1 below, a waste mixture was prepared using a mixer, and then an additive was added to the prepared waste mixture and mixed to prepare a mixture containing the additive. The mixture containing the prepared additive was molded at 1000 pressure by using a press dry molding machine (INOCATOR), and then fired by using a tunnel kiln (dry tunnel kiln) to prepare a lightweight building material.

The sewage sludge used was produced as a cake at the sewage treatment plant in Gwangju-si, Gyeonggi-do, and used a water content of 75-80% that was transported without any other treatment.

Ready-mixed concrete sludge was produced in the manufacturing of concrete under Nam Co., Ltd., Gyeonggi-do. The water content was 80%, and it contained alkaline chemicals and limestone.

The waste foundry sand was produced after use at high temperature for casting in a casting factory in Namdong Industrial Complex in Incheon, and used silicon dioxide (SiO ₂ ) and dust.

The waste asbestos was supplied from the construction site in Hapjeong-dong, Pyeongtaek-si, and used blue stone, white stone or brown stone.

The plant material was supplied from a coal-fired power plant in Dangjin-gun, Chungnam, South Korea, and used silicon dioxide (SiO ₂ ), iron, chromium, and sulfur.

Incineration residues were supplied from the Seoul Metropolitan Reclamation Site located in Baekseok-myeon, Seo-gu, Incheon, and used phosphorus, alkaline residues, silica, dust and iron.

Grindstone residue was supplied by Ewha Industry located in Pocheon, Gyeonggi-do, and used more than 325 mesh of mineral grinding stone.

The steel mill dust was supplied by Hyundai Steel, located in Dangjin-gun, Chungnam, Korea, and contained iron (Fe) and silicon dioxide (SiO ₂ ).

In addition, feldspar was composed of a component of K ₂ O ₉ Na ₂ O ₃ SiO ₂ , purchased with a particle size of 2 mm or less in the critical mine, and bentonite was purchased from Salgreen Co., Ltd. with a particle size of 3 mm or less. Zeolite was purchased from Sal Green Co., Ltd. and yellow soil was purchased from Wind Direction Co., Ltd. with particle size of 2 mm or less. Mica was purchased from Gyeongbuk Bonghwa with particle size of 2 mm or less. It was purchased from Gyeongnam Pyrite Mine.

division Ingredient (% by weight) Firing time Firing temperature product Example 1 Sewage sludge 40, ready-mixed sludge 40, zeolite 20 3: 00 1140 DEG C Pitcher Press Block Example 2 Sewage sludge 40, ready-mixed sludge 40, zeolite 20 3: 00 1155 ℃ Lightweight brick Example 3 Sewage sludge 45, waste asbestos 40, mica 15 3: 50 1150 DEG C Lightweight panel Example 4 Sewage sludge 50, waste foundry sand 30, bentonite 20 3: 50 1150 DEG C Lightweight brick Example 5 Sewage sludge 50, power plant ash 35, mica 15 3: 40 1140 DEG C Pitcher Press Block Example 6 Ready-mixed sludge 50, incineration residue 40, zeolite 10 4: 00 1165 ℃ Lightweight brick Example 7 Ready-mixed sludge 50, incineration residue 40, zeolite 10 4: 00 1145 ℃ Pitcher Press Block Example 8 Ready-mixed concrete sludge 50, abrasive stone residue 30, feldspar 20 3: 40 1120 DEG C Pitcher Press Block Example 9 Ready-mixed concrete sludge 50, waste foundry sand 35, bentonite 15 4: 10 1160 ℃ Lightweight brick Example 10 Ready-mixed concrete sludge 45, power plant ash 25, mica 30 4: 10 1155 ℃ Lightweight brick Example 11 Ready-mixed concrete sludge 40, steel mill dust 40, lead stone 20 3: 30 1140 DEG C Pitcher Press Block Example 12 Ready-mixed concrete sludge 50, waste asbestos 35, zeolite 15 3: 50 1170 ℃ Lightweight panel Example 13 Sewage sludge 40, ready mix sludge 20, power plant ash 20, zeolite 20 3: 20 1165 ℃ Lightweight brick Example 14 Sewage sludge 45, ready-mixed sludge 20, asbestos 20, bentonite 15 3: 30 1165 ℃ Lightweight brick Example 15 Ready-mixed concrete sludge 50, abrasive stone residue 20, steel mill dust 15, feldspar 15 3: 50 1155 ℃ Lightweight brick Example 16 Ready-mixed concrete sludge 50, waste foundry sand 20, waste asbestos 15, bentonite 15 3: 50 1155 ℃ Lightweight brick

As shown in the results of Examples 1 to 2 and 6 to 7, it was confirmed that even if they have the same constituents, the kind of the product finally produced depends on the firing temperature. This is because no pores are formed in the product depending on the firing temperature. That is, when the firing temperature is 1145 ° C. or less, pores are maintained in the product, but when the baking temperature is 1,150 ° C. or more, the pores melt and disappear.

Comparative Examples 1 to 4: Manufacturing method of lightweight building materials using sewage sludge

A lightweight building material was manufactured in the same manner as in Examples 1 to 16, except that sewage sludge was used instead of the waste mixture.

division
Components (wt%) sewer
Sludge feldspar ocher Bento
Night Zeol
light Firing temperature
(° C) Firing time product Comparative Example 1 40 20 40 - - 1140 3:30 Pitcher
Sidewalk Comparative Example 2 50 20 - 30 - 1140 3:30 Pitcher
Sidewalk Comparative Example 3 50 - - - 50 1170 4:10 Lightweight panel Comparative Example 4 50 - 50 - - 1190 4:20 Lightweight brick

Experimental Example 1 Physical Properties Experiment of Building Materials Prepared in Examples and Comparative Examples

Specific gravity, water permeability, compressive strength, non-combustibility, and color were measured for the lightweight building materials manufactured in Examples and Comparative Examples. Specific gravity, permeability and compressive strength were measured by KSF2353, KSF 2322 (2000) and KSF4004 (2008), respectively.

Incombustibility was observed after changing the building materials at 1000 ℃ for 1 hour.

Specific gravity (g / cm ³ ) Permeability
(cm / s) Compressive strength
(N / m ² ) nonflammable color Example 1 68/100 3.9 x 10 ^-2 24 Good Dark gray Example 2 68/100 1.5 × 10 ^-2 24 Good Dark gray Example 3 62/100 1.9 × 10 ^-2 26 Good Light gray Example 4 68/100 3.2 x 10 ^-2 23 Good Light gray Example 5 58/100 3.7 × 10 ^-2 23 Good Light gray Example 6 62/100 1.5 × 10 ^-2 21 Good Dark gray Example 7 62/100 3.8 × 10 ^-2 21 Good Dark gray Example 8 64/100 1.1 × 10 ^-2 24 Good Dark gray Example 9 72/100 3.2 x 10 ^-2 26 Good Dark gray Example 10 64/100 1.2 × 10 ^-2 27 Good Dark gray Example 11 68/100 3.8 × 10 ^-2 28 Good Dark gray Example 12 62/100 1.7 × 10 ^-2 24 Good Dark gray Example 13 66/100 1.4 x 10 ^-2 25 Good Dark gray Example 14 66/100 1.5 × 10 ^-2 26 Good Dark gray Example 15 66/100 1.6 × 10 ^-2 24 Good Dark gray Example 16 68/100 1.7 × 10 ^-2 23 Good Dark gray Comparative Example 1 58/100 2.2 × 10 ^-2 17 Good Light gray Comparative Example 2 61/100 2.4 × 10 ^-2 16 Good Light gray Comparative Example 3 66/100 0.7 x 10 ^-2 16 Good Light gray Comparative Example 4 77/100 0.6 × 10 ^-2 17 Good Light gray

From Table 3, it can be seen that the weight reduction is generally achieved when including waste asbestos, power plant ash, incineration residues, or abrasive stone, and that the compressive strength is better than when including abrasive stone, steel mill dust, waste foundry sand, power plant ash or waste asbestos. Could.

In addition, Example 1, Example 5, Example 7 and Example 11 manufactured with a permeable sidewalk block was excellent in water permeability, and the building materials of Examples 1 to 16 and Comparative Examples 1 to 4 did not generate combustion. It was confirmed that there is no abnormality on the outer surface of the building material. In addition, no harmful gas was generated in the process of maintaining at 1000 ° C. for 1 hour.

Finally, in the case of building materials containing ready-mixed sludge (Examples 1 to 2, 6 to 16), it was confirmed that the dark gray color was shown.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereto will be. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (12)

Manufacturing method of light weight construction material for permeation using waste including the following steps:
(a) preparing a waste mixture by adding 10 to 100 parts by weight of one or more kinds of waste selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos, and power plant ash based on 100 parts by weight of sewage sludge ;
(b) 10 to 20 parts by weight of feldspar, 10 to 20 parts by weight of bentonite, 10 to 20 parts by weight of zeolite, 15 to 30 parts by weight of ocher, 15 to 60 parts by weight of mica and 5 to 25 parts by weight of the waste mixture. Mixing an additive selected from the group consisting of parts by weight to prepare a mixture containing the additive;
(c) forming a mixture by molding the mixture containing the additive; And
(d) The molded product is fired at 1100 to 1145 ° C. for 3 to 5 hours to have a compressive strength of 21 to 28 N / m ² , and a water permeability of 3.2x10 ^-2 to Manufacturing a lightweight building material for a pitcher of 3.9x10 ^-2 cm / s .
Method for manufacturing non-combustible and sound-absorbing lightweight building materials using waste including the following steps:
(a) preparing a waste mixture by adding 10 to 100 parts by weight of one or more kinds of waste selected from the group consisting of ready-mixed sludge, waste foundry sand, waste asbestos, and power plant ash based on 100 parts by weight of sewage sludge;
(b) 10 to 20 parts by weight of feldspar, 10 to 20 parts by weight of bentonite, 10 to 20 parts by weight of zeolite, 15 to 30 parts by weight of ocher, 15 to 60 parts by weight of mica and 5 to 25 parts by weight of the waste mixture. Mixing an additive selected from the group consisting of parts by weight to prepare a mixture containing the additive;
(c) forming a mixture by molding the mixture containing the additive; And
(d) The molded product was baked at 1150 to 1200 ° C. for 3 to 5 hours to obtain a compressive strength of 21 to 28 N / m. ² Manufacturing lightweight non-combustible and sound-absorbing building materials.
delete delete delete Manufacturing method of light weight construction material for permeation using waste including the following steps:
(a) 10 to 65 parts by weight of one or more types of waste selected from the group consisting of incineration residues, abrasive stone residues, waste foundry sand, waste asbestos, steel mill dust and power plant ashes, for 100 parts by weight of ready-mixed sludge, to prepare a waste mixture step;
(b) 10 to 20 parts by weight of feldspar, 10 to 20 parts by weight of bentonite, 10 to 20 parts by weight of zeolite, 15 to 30 parts by weight of ocher, 15 to 60 parts by weight of mica and 5 to about 18 parts by weight of the waste mixture. Mixing an additive selected from the group consisting of 25 parts by weight to prepare a mixture containing the additive;
(c) forming a mixture by molding the mixture containing the additive; And
(d) The molded product is fired at 1100 to 1145 ° C. for 3 to 5 hours to have a compressive strength of 21 to 28 N / m ² , and a water permeability of 3.2 × 10 ⁻² to Manufacturing a lightweight building material for a pitcher of 3.9x10 ^-2 cm / s .
Method for manufacturing non-combustible and sound-absorbing lightweight building materials using waste including the following steps:
(a) 10 to 65 parts by weight of one or more types of waste selected from the group consisting of incineration residues, abrasive stone residues, waste foundry sand, waste asbestos, steel mill dust and power plant materials, for 100 parts by weight of ready-mixed sludge to prepare a waste mixture step;
(b) 10 to 20 parts by weight of feldspar, 10 to 20 parts by weight of bentonite, 10 to 20 parts by weight of zeolite, 15 to 30 parts by weight of ocher, 15 to 60 parts by weight of mica and 5 to about 18 parts by weight of the waste mixture. Adding an additive selected from the group consisting of 25 parts by weight, followed by mixing to prepare a mixture containing the additive;
(c) forming a mixture by molding the mixture containing the additive; And
(d) The molded product was calcined for 3 to 5 hours at a temperature of 1150 ~ 1200 ℃ to compressive strength of 21 ~ 28 N / m ² Manufacturing lightweight non-combustible and sound-absorbing building materials.
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