KR100787541B1 - Eco-brick including carbon type adsorbent and manufacturing method thereof - Google Patents

Abstract

The masonry brick of the present invention is composed of 5 to 40% by weight of cement and 5 to 40% by weight of coal, eluting and removing the contained ash, and mixing 60 to 95% by weight of a mixture of the porous carbon-based adsorbent and sand.

Through the above configuration, the present invention dramatically improves the adsorption performance for harmful substances by generating a cavity after eluting the ash containing coal by treating the acid with an acid as compared to using coal in the prior art. Through this, the present invention is not only very useful for the prevention of sick house syndrome, but also has the effect of reducing the weight of the masonry brick is a very useful invention in the building materials industry.

Carbon-based adsorbent, masonry brick, eco-friendly, sick house syndrome

Description

ECO-BRICK INCLUDING CARBON TYPE ADSORBENT AND MANUFACTURING METHOD THEREOF}

1 is an electron micrograph of a carbon-based absorbent of the present invention.

FIG. 2A is a particle size distribution curve of ordinary sand, and FIG. 2B is a particle size distribution curve of a carbon-based adsorbent.

3 is a graph showing the compressive strength according to the change of carbon-based adsorbent substitution rate for each age.

4 is a graph showing the tensile strength of the carbon-based adsorbent substitution rate for each age.

5 is a graph showing the change in the weight of the air with age.

6 is a graph showing the amount of absorption with age.

7A and 7B are graphs showing the concentration of carbon dioxide according to the carbon-based adsorbent substitution rate. FIG. 7A corresponds to 7 days of age and 7B corresponds to 28 days of age.

8 is a graph showing the re-emission amount of carbon dioxide over time.

9 is a graph showing the amount of radon emissions with age.

The present invention relates to an eco-friendly masonry brick including a carbon-based adsorbent and a method for manufacturing the same, and more particularly, including a carbon-based adsorbent manufactured by a special process, while effectively adsorbing harmful substances generated in new building materials. The present invention relates to an eco-friendly masonry brick easily mixed with other materials and a method of manufacturing the same.

Brick is a building material baked at high temperature with clay as the main raw material, cut into a certain size, and appropriately stacked and used as a building material. Bricks have been used as an important material in construction since ancient times, but in building materials generated when building a house, contaminants such as radon, asbestos, carbon monoxide, carbon dioxide, nitrogen oxides, ozone, fine dust, and floating bacteria, such as mold and viruses Bacteria, mites and pets can also contaminate indoor air. These pollutants are not discharged out of the building and accumulate indoors, causing various diseases in the human body.

As an example for overcoming the above problem, Korean Patent Publication No. 2003-8857 discloses a mixture of 50% yellow clay, activated carbon 20%, biotite 5%, jade 5%, lime 5%, straw 10%, and sand 5% by weight. The brick is disclosed. In addition, Korean Patent Laid-Open Publication No. 2004-99704 discloses a refractory brick composed of 80 wt% ocher powder, 14 wt% charcoal powder, and 6 wt% straw. The patents are effective in adsorbing toxic gases and the like discharged from building materials by utilizing the adsorption performance of loess and activated carbon, but there is a problem in that the specific gravity of loess and activated carbon is small so that they do not mix well with other materials.

Meanwhile, Korean Laid-Open Patent Publication No. 2002-65190 adds an appropriate amount of water to 60% by weight of coal ash, 23% by weight of a curing agent, and 17% by weight of sand, and then stirs sufficiently to form bricks by using a high pressure vibration brick molding machine. A light coal ash brick having low strength and excellent thermal action has been disclosed. The coal ash brick has a meaning of utilizing coal fuel, which is a waste fuel, as a building material, but has a limitation in overcoming the above problems.

Therefore, the inventors of the present invention, after years of research, included coal manufactured in a special process as a carbon-based adsorbent in brick, and has an excellent adsorption performance for toxic gases, but also includes an eco-friendly masonry brick including a carbon-based adsorbent mixed well with other materials. The manufacturing method was developed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an eco-friendly masonry brick and a method of manufacturing the same, which are easily adsorbed with other materials during brick manufacturing while effectively adsorbing harmful substances generated in new building materials, including carbon-based adsorbents manufactured by a special process. .

In order to achieve the above technical problem of the present invention, the present invention is a mixture of porous carbon-based adsorbent and sand pulverized and containing ash by treating 5 to 40% by weight of cement and coal with acid as a main component. To provide an eco-friendly masonry brick made by mixing ~ 95% by weight.

The sand and the porous carbon-based adsorbent are preferably mixed in a weight ratio of 1: 1 to 9: 1.

The cement is preferably any one of Portland cement, fly ash cement and blast furnace slag cement.

The acid used in the porous carbon-based adsorbent is preferably a strong acid, and pulverized to a size of 0.3 to 10 mm.

When the addition of any one or more selected from the group consisting of loess, clay, clay, shale, reward soil, kaolin, feldspar and kaolinite stone to the main component has further improved adsorption performance, in this case the amount is 100 parts by weight of the main component It is preferable to add 10-30 weight part with respect to.

1.5 to 3 parts by weight of the organic plasticizer and 3 to 15 parts by weight of the inorganic plasticizer may be added singly or mixed with respect to 100 parts by weight of the main component. The organic plasticizer is preferably at least one compound selected from the group consisting of gelatin, gum arabic, methylcellulose, glycerin, pulp waste liquid, and polyvinyl alcohol, and the inorganic plasticizer is pottery stone, sericite, bentonite, vermiculite and At least one selected from the group consisting of waste clay is preferable.

The coal has a higher carbon adsorption performance of 30 to 50%, a calorific value of 3,000 kcal / kg or less, and an ash content of 60 to 80% eluted by treatment with the acid.

The present invention provides a masonry brick comprising a porous carbon-based adsorbent obtained by treating 30 to 50% carbonized coal with acid to elute and remove 60 to 80% of the ash contained in the masonry brick including cement and sand. to provide.

In the present invention, in the preparation of masonry bricks, a first step of kneading by adding water to a single or a mixture of the main component and the additive component; A second step of extruding the kneaded material through a brick hydraulic molding machine and then molding the kneaded material into a brick shape; And it provides a manufacturing method of eco-friendly masonry brick comprising a third step of drying the molded brick for 10 to 20 hours.

It is preferable to knead by adding 5 to 30 parts by weight of water with respect to 100 parts by weight of the mixture in the first step.

It is also possible to further include the step of aging the kneaded product prepared in the first step between 10 and 20 ℃ for 50 to 70 hours between the first step and the second step.

Preferably in the third step, the drying temperature is preferably dried to 10 ~ 50 ℃.

Hereinafter, the present invention will be described in more detail.

The present invention is an environmentally friendly masonry brick made by mixing 60 to 95% by weight of a mixture of porous carbon-based adsorbent and sand pulverized and containing ash by treating 5 to 40% by weight of cement and coal with acid as a main component. It is about.

The main components of the present invention are cement, sand and porous carbon-based adsorbents, of which sand and porous carbon-based adsorbents are added in an amount of 60 to 90 wt% based on the main component, and when the amount of sand is increased internally, An inverse relationship is established in which the input amount of the carbon-based adsorbent decreases and in the opposite case, the input amount of the porous carbon-based adsorbent increases. In other words, the carbon-based adsorbent of the present invention has a particle size distribution similar to that of sand, and is lighter than sand (see FIGS. 2A and 2B), so that it may be added by substituting sand. Mechanical properties such as strength can satisfy the reference value.

Meanwhile, the sand and the porous carbon-based adsorbent are preferably mixed in a weight ratio of 1: 1 to 9: 1. If the porous carbon-based adsorbent is more than 90%, there is a side effect of undersintering and lowering the compressive strength at the same time the absorption rate in the molded mortar has a large absorption rate and various cracks, if less than 10%, the plasticity is less While compressive strength may be reduced, the adsorption performance of harmful substances tends to be decreased.

The cement is generally not particularly limited as long as it can be used in the masonry brick, but preferably one kind of Portland cement is used. The use of fly ash and blast furnace slag cement can be used together because the surface finish is good. The cement is preferably added 5 to 40% by weight based on the total main components. If the amount of the cement added is less than 5% by weight, it is difficult to form the masonry bricks, and when the amount of the cement is more than 40% by weight, the cement becomes too easily hardened and the strength is lowered.

The carbon-based adsorbent of the present invention is used by treating coal with acid to elute and remove the contained ash and grind it. The coal is high in carbonization and calorific value, an industrially valuable anthracite coal (more than 90% of carbon, calorific value of 7,000 ~ 8,000 kW / kg), bituminous coal (bituminous coal, carbonization degree of 70 ~ 90%, calorific value of 6,000 ~ 8,200 kW / kg), lignite (carbonity) 60 ~ 70%, calorific value 5,000 ~ 6,000 ㎉ / ㎏), etc. can be used, but more preferably 30 ~ 50% of the carbonization, the calorific value of less than 3,000 ㎉ / ㎏ of industrial waste value of little industrial value Coal can also be used as the carbon-based adsorbent of the present invention, which is very advantageous in terms of recycling resources and reducing production costs. However, when the degree of carbonization is less than 30%, it is difficult to lower the drying temperature in the drying process of the masonry brick, and the addition effect is extremely small since the adsorption performance is low.

Meanwhile, in the prior art, the general coal is used as a constituent material of mortar without processing and processing, and thus, only the diversification of the mortar material and the recycling of waste coal are pursued. However, the carbon-based adsorbent of the present invention is used by treating the coal with an acid to elute and remove the ash contained therein. When the coal is treated with acid, a large amount of cavities are generated as the ash content is eluted, and the generated cavities are very advantageous for adsorbing harmful substances such as formaldehyde generated in a building structure. The functional groups of the carbon atoms present on the inner surface of the force exert attractive forces on the surrounding liquid or gas, thereby adsorbing the molecules of the adsorbate better. Through this, it is possible to solve problems such as sick house syndrome and maintain a pleasant environment, and also to effectively adsorb alkali components and radon emitted from cement, which are the main components of mortar. In this case, it is desirable to elute about 60 to 80% of the ash contained in the first coal. If it is less than 60%, the formation of cavities is lowered, so that the adsorption performance is lowered. If it is more than 80%, the strength is not only weakened, but also difficult to be mixed with other materials.

In addition, the existing charcoal and activated carbon, which are used as materials for various building materials because of excellent adsorption to harmful substances, have a low specific gravity and are highly likely to float in water, so it is very difficult to uniformly mix the charcoal with water. . On the contrary, the carbon-based adsorbent of the present invention has a specific gravity of 1.4 to 2.0, which is somewhat smaller than that of general sand, but is easily mixed when mixed with water, so that the carbon-based adsorbent is uniformly mixed with other materials.

On the other hand, the acid used in the present invention is not limited in kind as long as it can react with coal to elute the containing ash, preferably, using a strong acid can easily elute the containing ash and hydrochloric acid may be used. , Sulfuric acid and nitric acid.

The carbon-based adsorbent may be ground to a size similar to sand, but more preferably about 0.3 to 10 mm in size. When the carbon-based adsorbent pulverized to the above-mentioned size is mixed with sand, the size of the particle size of the sand and the carbon-based adsorbent is well matched, thus enabling precise production.

On the other hand, in order to improve the adsorptive performance of the masonry brick of the present invention, one or more selected from the group consisting of loess, clay, white clay, shale, precious soil, kaolin, feldspar and kaolinite stone may be further added to the main component. In particular, loess has four types of enzymes: catalase, diphenol, oxydiaze, and saccharase, and these enzymes can play a role in toxins, degradability, and purification. In addition, the ocher is a honeycomb structure with a large surface, and a large number of spaces are formed in a multi-layered structure. The multi-layered structure is absorbed and stored in a large amount of far-infrared rays, and is very easy to dissipate when heated to stimulate molecular activity of other objects. .

The loess and the like added in the present invention is preferably added 10 to 30 parts by weight based on 100 parts by weight of the main component. If the amount is less than 10 parts by weight, the addition effect of loess and the like is insignificant, and if it exceeds 30 parts by weight, the compressive strength may be lowered.

On the other hand, regardless of the type of coal, if the amount of the carbon-based adsorbent added in the main component exceeds 50% by weight, it may be difficult to vacuum extrusion molding due to the decrease in plasticity. In order to solve the above problems and improve plasticity, the present invention may add an organic or inorganic plasticizer in addition to the main component.

The organic plasticizer is preferably at least one compound selected from the group consisting of gelatin, gum arabic, methylcellulose, glycerin, pulp waste liquor and polyvinyl alcohol, and the inorganic plasticizer is pottery stone, sericite, bentonite, vermiculite and waste bag. At least one selected from the group consisting of clay is preferable.

The added amount is 1.5 to 3 parts by weight of the organic plasticizer and 3 to 15 parts by weight of the inorganic plasticizer alone or mixed with respect to 100 parts by weight of the main component. If the organic plasticizer and the inorganic plasticizer are added below each lower limit, the meaning of the addition of the plasticizer is insignificant. If the organic plasticizer and the inorganic plasticizer are added above the upper limit, it may cause side effects that it is difficult to discharge the molding brick from the vacuum extrusion machine. .

In the manufacturing method of the eco-friendly masonry brick of the present invention, in the manufacture of a brick, a first step of kneading by adding water to the material of the substrate described above, a second step of extruding the kneaded material through an extruder and then shaped into a brick shape And, and a third step of drying the molded brick for 10 to 20 hours.

In the case of the first step, it is also possible to mix only cement, sand and carbon-based adsorbent as the main component or to add organic, inorganic plasticizer and ocher to the main component. The mixture is kneaded by addition of an appropriate amount of water. At this time, the amount of water to be added is sufficient if it is added in an appropriate ratio to produce a general masonry brick according to the amount of the mixture is added, more preferably it is advantageous to add 5 to 30 parts by weight of water to 100 parts by weight of the mixture Do.

In the second step, the kneaded material is extruded through a compressor and then molded into an appropriate shape according to the purpose of use.

Meanwhile, it is also possible to further include the step of aging the mixture prepared in the first step at 10 ~ 20 ℃ for 50 to 70 hours between the first step and the second step. In this case, the granules of the carbon-based adsorbent and other raw materials are sufficiently hydrated, and some silicate materials and water come into contact with each other to form a cemented material, thereby increasing moldability. In addition, this process leads to oxidation and reduction reactions, which in turn lead to the growth of microorganisms, which makes the materials smooth and uniform, and at the same time increases the fluidity and cohesiveness, resulting in a more uniform surface of the molded body.

In the third step, the masonry brick formed in the second step is sufficient to maintain the temperature rising time and drying time in a conventional brick manufacturing process, but preferably drying at room temperature drying or 10 to 50 ℃ for 10 to 20 hours. It is advantageous to minimize the cracking of the final masonry brick.

Hereinafter, the present invention will be described in detail by way of examples. The following examples are merely illustrative of the present invention, but the scope of the present invention is not limited to the following examples.

Synthesis Example Preparation of Porous Carbon Adsorbent

1 kg of coal (purchased from Samchully briquettes) having a carbonization degree of about 40% and a calorific value of about 2,800 kcal / kg was placed in a reaction vessel, and sulfuric acid was added and reacted for about 4 hours so that about 70% of the ash contained in the coal was eluted. . After the reaction was dried in a natural state for 24 hours and then pulverized to the size of about 5mm to prepare a porous carbon-based adsorbent.

<Examples 1 to 15>

Portland cement, the carbon-based adsorbent synthesized in Synthesis Example 1, and sand as shown in the mixing ratio shown in Table 1 were put in a forced fan mixer and mixed at 30 rpm for 30 seconds to dry beam. Then, water was added and mixed at 60 rpm for 60 seconds, followed by compression molding to prepare a masonry of 7.5 cm (diameter) * 8 cm (height) size in a cylindrical shape. Thereafter, the molded masonry brick was dried at room temperature for 15 hours to produce an eco-friendly masonry brick.

<Comparative Examples 1 to 3>

A final mortar composition was prepared in the same manner as in Example 1 except that the carbon-based adsorbent synthesized in Synthesis Example 1 was not added.

TABLE 1

In Table 1, W means water, C means cement, and S means sand. The mixing ratio refers to the weight ratio of cement and sand, and W / C refers to the mixing ratio (weight ratio) of water and cement as water cement ratio. The substitution rate of the carbon-based adsorbent means the weight of the volume ratio of the carbon-based adsorbent substituted for sand.

<Experimental Example> Deodorization rate measurement of eco-friendly masonry bricks

The physical properties of Examples 1 to 15 and Comparative Examples 1 to 3 below were evaluated to show the results.

1. Deodorization rate measurement

20 g of the porous carbon-based adsorbent of Synthesis Example 1 was introduced into the chamber, and formaldehyde (the main component causing the sick house syndrome) was injected, and the deodorization rate was measured in units of 30 minutes. Then, the same experiment was performed using the sample without the control as a control group, and the results are shown in Table 1 below. Meanwhile, the deodorization rate test was performed by the method of KICM-FIR-1085. Meanwhile, in the following Table 1, the control means measured without putting anything.

TABLE 2

Elapsed time (minutes) 0 30 60 90 120 Control (ppm) 81 78 75 72 70 Synthesis Example (ppm) 81 33 28 20 16 Deodorization rate (%) - 55.1 62.7 72.2 78.6

As shown in Table 2, the deodorization rate after 2 hours of the porous carbon-based adsorbent after the special process of the present invention was found to be 78.6%, which has a very excellent adsorption performance. In addition, it can be expected to exhibit more effective adsorption performance when used in the structure for a long time.

2. Compressive strength measurement

 In the compressive strength test, in accordance with the provisions of KS F 4004 concrete brick, both the specimen pressurized surfaces were smoothly finished to be perpendicular to the longitudinal axis of the specimen, and the masonry bricks of the examples and the comparative examples were immersed in water for 2 hours or more. After that, the compressive strength was tested using a voltage device having a spherical surface at the center, and the pressing speed was about 0.2 to 0.3 N / mm2 per second with respect to the cross-sectional area of the pressing surface. After calculating the compressive strength of the concrete brick from the maximum load thus obtained in accordance with Equation 1 below, it is shown in FIG.

[Equation 1]

Compressive Strength (N / ㎡) = P / A ₁

However, P is the maximum load (N), A ₁ means the cross-sectional area (mm 2) of the specimen pressing surface.

As a result, in FIG. 3, the compressive strength of the total blending ratio was higher as the blending ratio was higher, and the compressive strength was smaller as the carbon-based adsorbent was added. Has the highest intensity expression. As the carbon-based adsorbent was added, the compressive strength decreased as the carbon-based adsorbent was increased.

This tendency is considered to be the result of the higher the mixing ratio, the higher the carbon-based adsorbent addition rate, the smaller the density of the added carbon-based adsorbent. In addition, the quality standards of KS were found to satisfy both the normal and lightweight bricks except for the addition of 40% in 1: 2, 30% and 40% in 1: 3 and 1: 5. .

The grades of grade C bricks, etc. are based on the quality of KS F 4004 concrete bricks, and the grade C bricks have a compressive strength of 16 MPa or more. have.)

3. Tensile strength measurement

Tensile strength was measured according to KS F 2423. As a result, Figure 4 is a graph showing the tensile strength of the carbon-based adsorbent substitution rate change for each age. In general, the compressive strength showed a similar tendency, and especially in the 1: 2 formulation, the highest tensile strength was found to be about 4.0 MPa at the standard 28-day age in Comparative Example 1. In the concrete bricks with carbon-based adsorbents, there was no significant difference in tensile strength of about 1.3 ~ 2.4Mpa, and there was no difference in tensile strength of 0.8 ~ 2.4MPa and 0.6 ~ 1.6MPa in the other 1: 3 and 1: 5 formulations. As a result, as the blending ratio increased, the increase in strength did not change much as the age of the early age increased. These results are believed to be the strength at the early age of steam curing for 3 days after the production of concrete bricks.

4. Airborne weight measurement

The net volume and mass of the masonry brick were measured, and the dry weight of the masonry brick was measured by the following equation.

[Equation 2]

Weight Ratio = M / V

M is the mass (g) of the masonry brick, and V is the net volume (ml) of the masonry brick.

FIG. 5 is a graph showing the change in airborne specific weight by age, and as the overall carbon-based adsorbent increases, the dry weight tends to decrease according to the blending ratios. In case of the compounding ratio 1: 5, it was rapidly decreased at 20% of carbon-based adsorbent substitution rate, and gradually decreased thereafter.

As the mixing ratio increases, the reduction ratio of the dry weight in comparison with the comparative example increases. This is because the amount of carbon-based adsorbent added increases as the ratio of fine aggregate to cement increases. For reference, KS F 4004 (Concrete Brick) regulation satisfies the dry weight ratio. In the case of 1: 2 blending, the carbon-based adsorbent was significantly different in Class B at 30 ~ 40% of carbon-based adsorbent at all ages. After the lapse of time, the amount of absorption was less than that of the other substitution rates at 0 and 20%, and after 5 hours of curing, the absorption was greater than the other substitution rates at 0 and 20%. This is because the carbon-based adsorbent has a high absorption rate, it is determined that the initial absorption amount increases as the substitution rate increases.

5. Absorption rate measurement

Absorption rate test is based on the specification of KS F 4004 concrete brick, soaked in clear water at room temperature of 15 ~ 25 ℃ for 24 hours using the whole shape of concrete brick as it is, and then taken out of water, placed on a wire mesh, and drained for 1 minute. After wiping the surface with a wet cloth and measuring the surface mass of the specimen, the water absorption was measured according to Equation 3 below.

[Equation 3]

% Absorption = (m ₀ -m ₁ ) / m ₁ × 100

M ₀ is the mean mass (g) of the test specimen and m ₁ is It means the dry mass (g) of the test body.

6 is a graph showing the tensile strength according to the change of the carbon-based adsorbent substitution rate for each age was confirmed that the higher the replacement ratio of the carbon-based adsorbent shows a higher absorption rate.

6. CO2 absorption rate

To measure the adsorption capacity of carbon dioxide, cigarette smoke was generated in a sealed container of 10 × 10 × 30㎝ and put mortar into the carbon dioxide using a gas detector (Gastec coporation Japan, GV-100S) every 10 minutes, 1 hour, and 2 hours. The concentration was measured.

7A and 7B are graphs illustrating carbon dioxide concentrations according to changes in carbon-based adsorbent addition rate. As a result, in all formulations, the concentration of carbon dioxide decreased as time passed, and as the carbon-based adsorbent substitution rate increased, the adsorption power of carbon dioxide was increased. First, the case of the comparison at age 7 days CO ₂ reduction amount after one time in any combination than CO ₂ concentration value 5000ppm of the initial (0 hour) was reduced by 20% As the carbon-based adsorbent addition rate increased to 10 ~ 40% CO ₂ The concentration tended to decrease to 2000 ~ 300ppm. After 2 hours, the carbon dioxide concentration increased as 1000 ~ 300ppm and carbon dioxide decreased by 1000ppm after 1 hour as carbon-adsorbent addition rate increased. The 28-day age showed a similar tendency to the 7-day age, and after 1 hour, the carbon dioxide concentration increased as 2500ppm ~ 300ppm as the carbon-based adsorbent increased. As described above, the tendency of carbon dioxide decreases rapidly after 1 hour, and then slightly decreases thereafter. This is because the adsorption of carbon-based adsorbents is actively progressed.

7. Re-emission of CO2

Insert the masonry brick into a sealed container (20 × 30 × 20cm), generate tobacco smoke, remove the brick after 24 hours, put it in a clean container and measure the carbon dioxide concentration in the container every 10 minutes from 0 to 60 minutes. Up to time, every 30 minutes, the amount of CO ₂ emitted from the brick test body was measured by a digital measuring instrument (KD Engineering, Airboxx).

As a result, Figure 8 is a graph showing the carbon dioxide re-emission amount over time. There was no tendency for the adsorbed carbon dioxide to be re-released in all formulations, but the carbon dioxide concentration was decreased between the initial 10 minutes and 1 hour. As the carbon-based adsorbent addition rate increased, the carbon dioxide concentration decreased significantly, and after 1 hour, the constant carbon dioxide concentration was maintained.

8. Radon Gas Emissions

Radon was collected for 28 days after a radon collector (Rn-tech, α-track Radon Detector) was installed in the mortar composition cured for 3 days. Thereafter, when the alpha particles emitted from the radon and the nuclide were incident on the surface of the mortar, the traces generated by collecting the traces with alkali or the like were generated, and then the radon concentration was measured through a microscope. 9 is a graph showing the radon emissions for each age as a result.

In general, as the carbon-based adsorbent addition rate increased, the radon emission tended to decrease at all blending ratios. In the 1: 2 formulation of 7 days of age, about 4.23 (x10 ^-4 pCi / m ² xsec) was released in Comparative Example 1 (0% carbon-based adsorbent), but 1.02 (x10 ^{-4) in} 40% carbon-based adsorbent. pCi / m ² × sec) showed a decrease of about 75%. In 1: 3 formulation, it was released about 9.44 (x10 ^-4 pCi / m ² xsec) in Comparative Example 2, but decreased by 90% from 40% to 1.02 (x10 ^-4 pCi / m ² xsec). 18.5 (x10 ^-4 pCi / m ² xsec) was released in Comparative Example 3 in the 1: 5 formulation, but was about 2.62 (x 10 ^-4 pCi / m ² xsec) in 40% of the addition rate. 85% showed a tendency to decrease.

In the case of 1: 2 blend of 28 days, it was released about 4.69 (× 10 ^-4 pCi / m ² × sec) in Comparative Example 1, but it was 1.68 (× 10 ^-4 pCi / m ² × sec) at 80% carbon-based adsorbent. The decrease was about 65%. In the case of 1: 3 blend, 7.7 (x10 ^-4 pCi / m ² xsec) was released in Comparative Example 2, but it decreased by about 75% at 1.88 (x10 ^-4 pCi / m ² xsec) at 80% of the addition rate. In the case of 1: 5 blend, it was about 31.2 (× 10 ^-4 pCi / m ² × sec) in Comparative Example 3, and about 2.08 (× 10 ^-4 pCi / m ² × sec) at 80% 92% showed a tendency to decrease.

This is because the carbon-based adsorbent adsorbs radon gas generated from the concrete brick structure, and the amount of fine aggregate decreases as the carbon-based adsorbent addition rate increases, and as the blending ratio increases, radon emission tends to increase. The fine aggregates, that is, the river sand, are thought to emit a large amount of radon gas.

Eco-friendly masonry brick containing the porous carbon-based absorbent of the present invention has the following effects.

First, compared to the conventional coal used in bricks, by treating the coal with acid to elute the ash content to create a cavity to significantly improve the adsorption performance for harmful substances, it is very useful for the prevention of sick house syndrome.

Second, waste coal is also available, which is useful in terms of recycling resources.

Third, when the ocher is added to the main component, the adsorption performance of harmful substances is greatly improved.

Fourth, it is possible to overcome the lowering of the discharge rate due to the plasticity lowering that is likely to occur when only the coal is mixed by adding the organic / inorganic plasticizer to the main component.

Fifth, in the general manufacturing process of the masonry brick, further including the aging process to further improve the fluidity and cohesiveness of the mixture.

Sixth, unburned carbon can make the structure of the brick porous in the drying process, and thus can reduce the weight of the fired brick.

Seventh, since a light weight carbon-based adsorbent can be used by substituting heavy sand, it is possible to reduce the weight by more than 20% compared to a general masonry brick.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims. .

Claims (17)

As a main component, 5 to 40% by weight of cement and 60% by weight of coal are treated with acid to elute and remove the ash contained therein, and a mixture of pulverized porous carbon-based adsorbent and sand is mixed with 60 to 95% by weight. Carbon-based adsorbent is an eco-friendly masonry brick, characterized in that mixed in a weight ratio of 1: 1 ~ 9: 1. delete The method of claim 1, Said cement is any one selected from the group consisting of Portland cement, fly ash cement and blast furnace slag cement. The method of claim 1, The acid-friendly brick masonry, characterized in that the acid. The method of claim 1 The porous carbon-based adsorbent is eco-friendly masonry brick, characterized in that crushed to the size of 0.3 ~ 10 mm. The method of claim 1, The eco-friendly masonry bricks, characterized in that any one or more selected from the group consisting of loess, clay, clay, shale, reward soil, kaolin, feldspar and kaolinite stone is further added to the main component. The method of claim 6, The additive amount of the eco-friendly masonry brick, characterized in that 10 to 30 parts by weight based on 100 parts by weight of the main component. The method of claim 1, The eco-friendly masonry brick, characterized in that the addition of 1.5 to 3 parts by weight of the organic plasticizer and 3 to 15 parts by weight of the inorganic plasticizer alone or mixed with respect to 100 parts by weight of the main component. The method of claim 8, The organic plasticizer is one or more selected from the group consisting of gelatin, gum arabic, methyl cellulose, glycerin, pulp waste liquid and polyvinyl alcohol. The method of claim 8, The inorganic plasticizer is one or more selected from the group consisting of pottery stone, sericite, bentonite, vermiculite and waste clay. The method of claim 1, The coal has a degree of carbonation of 30 to 50%, the calorific value of the environmentally friendly masonry brick, characterized in that less than 3,000㎉ / ㎏. The method of claim 1, The eco-friendly plastering masonry brick, characterized in that the ash content eluted by the acid is 60 to 80%. In masonry bricks containing cement and sand, The environmentally-friendly masonry brick, characterized in that it comprises a porous carbon-based adsorbent pulverized by removing the ash content of 60 to 80% by treating 30 to 50% carbonized coal with acid. In manufacturing masonry bricks, A first step of kneading by adding water to the mixture of claim 1; A second step of extruding the kneaded material through a brick hydraulic molding machine and then molding the kneaded material into a brick shape; And And a third step of drying the molded bricks for 10 to 20 hours.  The method of claim 14, The method of manufacturing the eco-friendly masonry brick, characterized in that the kneading by adding 5 to 30 parts by weight of water with respect to 100 parts by weight of the mixture in the first step. The method of claim 14, The method of manufacturing the eco-friendly masonry brick further comprises the step of aging the kneaded product prepared in the first step between 10 and 20 ℃ for 50 to 70 hours between the first step and the second step. The method of claim 14, The drying step in the third step is the manufacturing method of the eco-friendly masonry brick, characterized in that 10 ~ 50 ℃.

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