KR101165666B1 - Heat insulating material for building used the lightweight aggregates that is produced by bottom ash and waste glass - Google Patents

Abstract

PURPOSE: An exterior insulation material for construction using lightweight aggregate produced using bottom ash and waste glass is provided to reduce material and construction costs by simplifying a construction process. CONSTITUTION: An exterior insulation material for construction using lightweight aggregate produced using bottom ash and waste glass comprises cement, fine aggregate, coarse aggregate, a mixture, and water. The fine aggregate uses lightweight aggregate having a size of 0.6-5mm. The coarse aggregate uses lightweight aggregate having a size of 5-20mm. The lightweight aggregate is produced using bottom ash, waste glass, and a foaming agent.

Description

Heat insulating material for building used the lightweight aggregates that is produced by bottom ash and waste glass}

The present invention relates to a building outer heat insulating material using a lightweight aggregate made of bottom ash and waste glass, and more particularly, aggregates and aggregates formed into pellets by pelletizing a mixture of bottom ash, waste glass and foaming agent. The surface of the coated with waste glass powder and then fired to classify the lightweight aggregate produced according to the size to replace the conventional aggregate for concrete, relates to an excellent heat insulating material for building excellent in heat insulation, light weight, economical, constructability.

Various types of insulation are used to prevent the loss of thermal energy in human life and industry. In general, the heat insulating material is mainly used as a raw material of petrochemical, and is formed by forming a large number of pores therein. That is, it is composed of organic chemical products such as foam urethane and expanded polystyrene, which is excellent in light weight and heat insulation. To provide. However, these organic chemical compositions have a disadvantage in that they are easily deformed or ignited by heat or fire due to their poor heat resistance, thus causing a fatal hazard to humans due to the generation of toxic gases during fire and ignition.

In addition, glass wool or asbestos is used as a flame-retardant heat insulating material. However, it is also classified as a pollutant that can cause lung cancer in the human body by melting glass or ore, forming a cotton yarn, and surface-treating with phenol. However, the use and economical efficiency are regulated. Since there is no substitute material with this, it is inevitably used for the insulation part which requires flame retardancy.

On the other hand, expanded polystyrene has been used very widely to date because it is a very light and economical heat insulating material. Due to these characteristics, foam polystyrene occupies most of packaging buffers, lightweight insulation building materials, and various containers, and its share is also gradually increasing. Although expanded polystyrene is useful because of its light weight, its lightness has become a rather important problem. That is, since disposal of foamed polystyrene takes up a large volume when used and hardly decomposes in a natural state, its treatment is a large environmental problem.

In addition, the current method of treating waste expanded polystyrene includes landfilling, incineration, fuelization, and recycling of reclaimed materials.However, landfilling involves problems such as secondary pollution or landfills, and other hazardous wastes such as dioxins in incineration. There is a problem that a large amount of components are discharged.

Although a number of known methods for pulverizing expanded polystyrene and using it on slurry such as portant cement and gypsum have been known, the amount of expanded polystyrene has been limited to ordinary cement slurry.

Therefore, there has been a continuous need for ultralight insulation compositions that can greatly improve the flame retardancy while maximizing the use of expanded styrene chips while minimizing the use of cement.

1. Republic of Korea Patent Publication No. 10-0457426 Ultra-light flame-retardant heat insulating material composition excellent in heat resistance, its manufacturing apparatus and manufacturing method using the same 2. Inorganic heat insulating material including inorganic foam and Republic of Korea Patent Publication No. 10-0479970 and its manufacturing method 3. Republic of Korea Patent Publication No. 10-0550234 non-combustible insulation composition, insulation using the same and a method of manufacturing the same 4. Republic of Korea Patent Publication No. 10-0928418 Non-combustible insulation manufacturing method using fly ash 5. Manufacturing method of lightweight foam insulation using cement or gypsum No. 10-0963907 6. Korean Utility Model Registration No. 20-0418808 Insulation

In the present invention to solve the conventional problems, by using a light aggregate aggregated from the bottom ash and coarse aggregate constituting the cement concrete to be constructed with the outer insulation material as the bottom aggregate and coarse aggregate, the construction of a separate insulation material It is a problem to provide a lightweight outer heat insulating material which is not necessary and which is excellent in heat resistance compared to the conventional heat insulating material and at the same time greatly improved in flame retardancy.

The outer insulation for building using lightweight ash manufactured from the bottom ash and waste glass of the present invention solved the above problems is made of cement, fine aggregate, coarse aggregate, admixture and water, the fine aggregate is the bottom ash and waste glass and A lightweight aggregate having a size of 0.6-5 mm is used as an aggregate formed by molding a mixture of a foaming agent, and the coarse aggregate is an aggregate formed by mixing a mixture of bottom ash, waste glass and a foaming agent of 5-20 mm. It is characterized by mixing using a lightweight aggregate having a size.

Here, the lightweight aggregate used as coarse aggregate and coarse aggregate is formed into pellets by adding a caking additive to a mixture of bottom ash, waste glass and blowing agent, and coated the surface of the molded product with waste glass powder, followed by a rotary By firing in the kiln is characterized in that the lightweight bone formed pores therein.

Here, the fine aggregate is characterized in that the mixing to include 5 to 20% by weight relative to the total amount of concrete.

Here, the coarse aggregate is characterized in that it contains 5 to 20% by weight relative to the total amount of concrete.

Here, the fine aggregate and coarse aggregate is characterized in that the mixing ratio of 80:20 ~ 20:80 by weight ratio.

Here, the outer insulation is characterized in that it comprises 20 to 60% by weight of cement, 1 to 40% by weight of fine aggregate, 1 to 40% by weight of coarse aggregate, 0.01 to 2% by weight of admixture and residual amount of water.

The present invention can provide a lightweight outer insulation for building excellent heat resistance and improved flame retardancy by using a lightweight aggregate having excellent heat insulation and low absorption and specific gravity.

In addition, the outer heat insulating material provided in the present invention, after the construction of a heat insulating material such as urethane resin on the outer wall during the construction of the conventional heat insulating material for the building, it does not require a complicated construction process to cure by pouring concrete on the outer wall, the building outer heat insulating material provided By placing the bay during the external wall construction, it is possible to form the insulation and the external wall in one construction, thereby simplifying the construction process, and also reducing the construction cost and material cost.

1 is a block diagram showing an example of a process of preparing a heat insulating material by preparing an outer heat insulating material for construction of the present invention.
2 is a cross-sectional view comparing the structure of the building exterior wall using a conventional heat insulating material and the outer wall using the heat insulating material of the present invention.
Figure 3 is a photograph comparing the cross section after curing of the concrete and the building insulation of the present invention.
4 to 10 is a graph showing the physical property test results of the building insulation and conventional concrete of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to an outer insulation for building, by replacing the existing general aggregate constituting concrete by replacing the light weight aggregate with low specific gravity and absorption rate made of waste ash bottom ash and waste glass and pores are formed inside, curing It is to provide a concrete that can be applied to the external insulation of the building to secure the lightweight of the concrete structure, and to ensure a certain level of insulation without using a separate insulation.

External insulation for building according to the present invention is to replace the aggregates such as sand and gravel used in the conventional concrete with a light aggregate using a bottom ash and waste glass to be compounded to a certain level,

It consists of cement, fine aggregate, coarse aggregate, admixture and water, and uses a lightweight aggregate having a size of 0.6 ~ 5㎜ as an aggregate of a mixture of bottom ash, waste glass and foaming agent as the fine aggregate. As a coarse aggregate, a mixture of bottom ash, waste glass, and foaming agent is molded into aggregate, which is mixed using lightweight aggregate having a size of 5 to 20 mm.

Preferably, the external insulation for building according to the present invention is 20 to 60% by weight of cement, 1 to 40% by weight of aggregate, 1 to 40% by weight of coarse aggregate, 0.01 to 2% by weight of admixture and residual amount of water.

The cement and the admixture constituting the present invention may be used as long as it is used in an external insulation made of cement concrete. For example, the cement may be one kind of Portland cement, and as the admixture, polycarboxylic acid is used as a high performance water reducing agent. For example.

In addition, blast furnace slag or fly ash may be further added as a mixed material within the range which does not inhibit this invention.

According to the present invention, the lightweight aggregate used as the coarse aggregate and the coarse aggregate is formed into pellets by adding a caking additive to a mixture of bottom ash, waste glass and blowing agent, and the surface of the molded product is coated with waste glass powder. Next, it is a lightweight aggregate formed with pores inside the fired in the rotary kiln. When the existing general aggregate and coarse aggregate are replaced with the lightweight aggregate, the unit volume weight of concrete can be reduced to ensure lightness, and the thermal conductivity is reduced by the pores inside the lightweight aggregate, thereby increasing the thermal insulation effect. You can get it.

Referring to the manufacturing process example of the lightweight aggregate,

Mixing step of mixing bottom ash, waste glass and foaming agent A step of manufacturing a molded body pelletizing while adding a binder to the mixed raw material A coating step of coating the surface of the molded body with waste glass powder and firing the coated molded body in a rotary kiln It is manufactured through a calcination step.

In the mixing step, the bottom ash and the waste glass are mixed in a weight ratio of 0.1: 99.9 to 30:70, preferably 10:90 to 25:75. If the bottom ash is less than the lower limit, there is a problem that the water absorption of the lightweight aggregate is too high, and if the upper ash exceeds the upper limit, the specific gravity exceeds 1.2.

The foaming agent is 0.1 to 10 parts by weight, preferably 0.2 to 4 parts by weight, more preferably 0.25 to 2 parts by weight based on 100 parts by weight of the bottom ash and the waste glass. If the foaming agent content is less than the lower limit, the specific gravity is too high due to insufficient porosity inside the lightweight aggregate, and if the upper limit is exceeded, even if the lightweight aggregate is coated with waste glass, the fracture strength is low, and the waste hole is opened due to the crushing. Is increased. At this time, as the blowing agent used, calcium carbonate, graphite and iron trioxide (Fe 2 O 3 or hematite) are preferable.

The molded article manufacturing step is made by adding 1 to 40 parts by weight of the binder, preferably 20 to 35 parts by weight to 100 parts by weight of the mixed raw materials of the mixing step. It is preferable to use a water glass aqueous solution as a caking agent, and the water glass aqueous solution uses 20-90 weight% of water glass, Preferably it uses 40-80 weight%.

The molding step is to adjust the interval between the stirring blade and the bottom surface of the pelletizer according to the particle size of the predetermined molded body and the stirring blade is 1 to 100 minutes at 50 ~ 1000 rpm, preferably 200 ~ 500 rpm, preferably Can be prepared by rotating for 5 to 20 minutes.

The coating step includes 1 to 60 parts by weight of waste glass powder, preferably 10 to 50 parts by weight, and more preferably 25 to 45 parts by weight, in 100 parts by weight of the molded body. If the waste glass powder for coating is less than the lower limit, the specific gravity is low, but the water absorption rate is high. If the waste glass powder for coating is above the upper limit, the moisture absorption rate is low, but the specific gravity is high.

The firing step is baked in a rotary kiln at 0.1 to 60 minutes, preferably 1 to 30 minutes at 600 to 1200 ° C, preferably at 800 to 1000 ° C.

The lightweight aggregate manufactured according to the manufacturing process example of the lightweight aggregate in the above is to be used to classify as fine aggregate and coarse aggregate by pulverizing according to the purpose of the present invention.

According to the present invention, the fine aggregate is preferably to use a lightweight aggregate aggregated so that the aggregate size has a size of 0.6 ~ 5㎜, it is preferable to mix to include 5 to 20% by weight relative to the total amount of concrete. . Generally, aggregate aggregate refers to aggregate of 5 mm or less, and when the size of the aggregate is 0.6 mm or less, problems of lowering of thermal insulation, lowering of light weight, and lowering of strength occur. In addition, when the content of fine aggregates increases, there is a problem of lowering strength, and when the content of fine aggregates decreases, there is a problem such as lowering of thermal insulation and light weight.

According to the present invention, the coarse aggregate is preferably to use a lightweight aggregate aggregated so that the aggregate size has a size of 5 ~ 20㎜, it is mixed to include 5 to 20% by weight relative to the total amount of cement concrete desirable. Generally, coarse aggregate refers to aggregate of 5 mm or more, and when the size of the coarse aggregate is 5 mm or less, problems of deterioration of thermal insulation and light weight are generated. In addition, when the content of the coarse aggregate increases, there is a problem of lowering the strength, and when the content of the coarse aggregate decreases, there is a problem such as lowering of insulation and lowering of light weight.

According to the present invention, the fine aggregate and coarse aggregate are preferably mixed in a ratio of 80:20 to 20:80 by weight. if. If the mixing amount of the fine aggregate is less than 20 weight ratio, there is a problem that the material separation occurs, if the excess weight ratio exceeds 80, there is a problem that the heat insulation and light weight.

More preferably, as disclosed above, the mixing ratio of the fine aggregate and the coarse aggregate is appropriately adjusted within a range not departing from the mixed amount of the fine aggregate and the coarse aggregate with respect to the total amount of concrete.

As described above, the building exterior heat insulating material of the present invention is mixed with each component constituting the present invention at an appropriate ratio, poured, then cured and cured to be used as building heat insulating material. As shown in FIG. 3, the external heat insulating material cured as described above is compared with general concrete curing polishing surfaces and cross-sections, whereas general concrete is irregular in size of aggregate, whereas external heat insulating material of the present invention is spherical fine aggregate and coarse aggregate. It can be seen that.

As the outer heat insulating material for building of the present invention, as shown in Figure 2, by using the light aggregate aggregated from the bottom ash and waste glass in the fine aggregate and coarse aggregate constituting the heat insulating material, flame retardancy, heat resistance and sound-absorbing sound resistance of the used lightweight aggregate It will have the physical properties, such as in the existing thermal insulation method, after laying concrete, and then insulated, and not treated with a finishing material on it, after pouring the outer heat insulating material of the present invention, immediately after finishing treatment by shortening the construction time Excellent workability, and the construction cost can be reduced.

The outer insulation for building using light weight aggregates made of the bottom ash and waste glass of the present invention described above was prepared, and compared with the cement concrete containing aggregates used conventionally and its performance and physical properties.

Experimental Method and Physical Characteristics

In order to compare the concrete physical properties of the low-absorption artificial light weight aggregate (L1, L2) used in the present invention and foreign commercial light weight aggregate products (H company made in China, T company made in Japan), the concrete unit mass, compression Strength, tensile strength (splitting), thermal conductivity, relative dynamic modulus and freeze thaw resistance were tested.

To find out the characteristics of lightweight aggregate concrete under the same particle size conditions, the content of aggregate by particle size was -9.5mm + 4.75mm; 0.75 wt (%), -4.75 mm + 2.8 mm; 82.25 wt (%); -2.8 mm + 1.18 mm; 16.1 wt (%), -1.18 mm; 0.9wt (%) was adjusted to immersion for 24 hours and then naturally dehydrated for 6 hours. For mixing, a 60L forced mixer (WJ-226, Woo Jin, Korea) was used, and the mixing method was dry bibim (light aggregate + fine aggregate; 60 sec) → bibim after cement input (60 sec) → bibim after water injection 120 seconds) in order to mix the materials.

L1 is an artificial light weight aggregate produced by firing waste glass and bottom ash molded body, and L2 is a low absorption artificial light weight aggregate manufactured by coating waste glass powder on the surface of the molded body. Manufacturing conditions are shown in Table 1 below.

<Experiment Method>

1. Material used

end. Cement and Admixtures

The cement used in the present invention is H type 1 ordinary portland cement, and its quality characteristics are powder 3,442 cm ² / g, specific gravity 3.15 and the main components are CaO (62.2%), SiO ₂ (20.5%), Al ₂ as shown in Table 2 below. O ₃ (6.88%) and ignition loss occurred 0.28%.

I. aggregate

Residual aggregate used for existing concrete was used for concrete mixed with existing lightweight aggregate (H company, T company), specific gravity 1.12, granulation rate 2.04 (particle size range 0.6 ~ 5mm), absorption rate 2.88%, unit mass 806kg / m ³ fine aggregate was used, the physical properties are as shown in Table 3 below.

Physical properties of artificial lightweight aggregate used as coarse aggregate are shown in Table 4 below. The thermal conductivity of artificial lightweight aggregate (L) developed in this study was 0.071W / m? K and 0.079W / m? K, respectively, and the dry density was 0.56g / cm ³ and 0.78g / cm ³ , respectively. 3.15% and 18.39% were lower than imported artificial lightweight aggregates (H and T), and the fracture loads were similar or higher with 575.0N and 695.0N, respectively, and the porosity was 64.87% and 77.33%, respectively. , T company).

* L1, L2: lightweight aggregate made of bottom ash and waste glass

All. Admixture

As the admixture used to improve working performance, H company polycarboxylic acid high performance water reducing agent having a pH of 5.82, a reduction ratio of 30.4%, and a bleeding ratio of 41.2% was used. The quality characteristics of the admixtures are shown in Table 5 below.

2. Formulation

In this experiment, water and binder ratio (W / B) was 39.0%, fine aggregate ratio (s / a) was 45.0%, unit quantity (W) was 160kg / m ³ , cement was 410kg / m ³ , L1 fine aggregate 172kg / m ^3, L2 fine aggregate 239kg / m ^3, H T Co. Corp. fine aggregate 789kg / m ^3, admixture was fixed to 2.46kg / m ³ artificial lightweight aggregate was set to the same volume of the formulation according to jeolgeon density.

* L1, L2: lightweight aggregate made of bottom ash and waste glass

<Experiment Method>

1. Slump and air volume

The slump measurement of concrete was tested according to KS F 2402 "Test method of concrete slump", and the air volume measurement was conducted according to KS F 2421 "Testing method of air volume of concrete not hardened by pressure method". The slump was set to 180 ± 25mm and the air volume was set to 4.5 ± 1.5%. In addition, the slump was measured after 30 minutes and 60 minutes immediately after the concrete was discharged from the mixer to determine the slump change with the elapsed time.

2. Unit mass

The unit mass of hardened concrete shall be prepared in accordance with KS F 2462 "Unit Mass Test Method for Structural Lightweight Concrete" and cured without evaporation or absorption of moisture at 16 ~ 27 ℃. On the 6th day, the specimens in the curing were transferred and subjected to underwater curing at 23 ± 1.0 ° C. for 24 hours, and then the specimens were measured in water and the surface-dried saturated mass was measured. Thereafter, the specimens were dried for 21 days under a relative humidity of 50 ± 5% and a temperature of 23 ± 1.0 ° C., and the air mass per 1 m ³ of concrete was calculated by Equation 1 by measuring the mass of the dried specimens. Where A is the dry mass (kg) of the concrete specimen on day 28, B is the surface dry saturated mass of the specimen, and C is the underwater mass of the specimen (see Equation 1 below).

3. Thermal conductivity

In order to measure the thermal conductivity of concrete, circular test specimens of 15 mm diameter and 30 mm thickness were manufactured, and the thermal conductivity tester (HC-074, EKO, Japan) was used in accordance with the plate heat flow meter method specified in KS L 9016 "Method of measuring thermal conductivity of thermal insulation materials". Measured by mounting.

4. Compressive strength and tensile strength

Concrete specimens were prepared in accordance with KS F 2403 "Method for Testing Concrete Strength Test", and compressive strength was measured by KS F 2405 "Compressive Strength Test Method for Concrete" and tensile strength of KS F 2423 Strength test method ". In addition, compressive strength and tensile strength were measured for 3 days, 7 days, 28 days of age.

5. Freeze thawing resistance

The freeze thaw test was conducted to find the resistance of concrete specimens to the rapid repetition of freeze thaw, and the test was started after 14 days of standard curing according to KS F 2456's test method for the resistance to rapid freeze thaw. Relative dynamic modulus was measured by KS F 2437 "Dynamic elastic modulus dynamic shear modulus and dynamic Poisson's ratio test method" of KS F 2437.

<Experimental Results>

1. Slump and air volume

The initial slump, the air volume, and the slump change value according to the elapsed time of the artificial lightweight aggregate concrete are shown in FIGS. 4 and 5.

As a result of the slump change test according to the elapsed time, the slump drop occurred in the order of concrete using L2 <T <L1 <H aggregate. The aggregates of L2, L1, and H companies, which produce lightweight aggregates by cooling the molded bodies fired in the rotary kiln, are mixed with concrete using aggregates having high absorption rates such as 3.15%, 18.39%, and 19.73%, respectively. When a large amount of compound water was absorbed into the aggregate, fluidity deterioration occurred. However, despite the high absorption rate of 28.94% in the T company aggregate, the fluidity decrease with the elapsed time was not large. This is because the molded product manufactured at high temperature was rapidly cooled by the pre-soaked method, At the same time, the light aggregate is manufactured in a state in which a considerable amount of water is entrapped in the internal waste and perforated pores.

2. Unit mass of concrete

The unit mass measurement value of concrete according to the artificial lightweight aggregate is shown in FIG. 6. The lowest unit mass of concrete using L1 was 1.630 t / m ³ , the unit mass of concrete using L2 was 1.660 t / m ³ , and the unit mass of concrete using H yarn was 1.835 t / m ³ , and T yarn was aggregated. The unit mass of concrete used in the furnace was 1.854 t / m ^{3, which} was the largest. This is similar to the absolute dry density size (L1; 0.56g / cm ³ , L2; 0.78g / cm ³ , H company; 1.14g / cm ³ , T company; 1.32g / cm ³ ) of aggregates used in lightweight aggregate concrete. The trend was shown.

3. Thermal conductivity

If the mixing level of lightweight aggregate concrete is constant, the thermal conductivity depends largely on the characteristics of the aggregate constituting the lightweight aggregate concrete.The higher the number of independent bubbles and the number of appropriate size formed inside the aggregate, the more the thermal conductivity interferes with the flow of heat. Will decrease. In general, the smaller the unit mass of lightweight aggregate concrete, the lower the thermal conductivity tends to be.

The measured thermal conductivity of concrete according to the artificial lightweight aggregate is shown in <7>. Thermal conductivity increased in the order of lightweight aggregate concrete prepared using L1 <L2 <H <T aggregate. This means that the higher porosity aggregate (L1; 77.33%, L2; 64.87%, H company; 48.36%, T company; 40.09%) is used, the pores in the aggregate interfere with the flow of heat, reducing the thermal conductivity of the overall lightweight aggregate concrete. It is because it reduces.

4. Compressive strength and tensile strength

To determine the compressive strength and tensile strength (splitting) characteristics of concrete according to the type of artificial lightweight aggregate, the unit binder content was 410kg / m ³ (cement; 369kg / m ³ , fly ash; 41kg / m ³ ), water binder ( The experiment was performed by fixing the W / B) ratio to 39% and the fine aggregate fraction (s / a) to 45%. The results are shown in <Table 7>, <Figure 8> and <Figure 9>. The compressive strength and tensile strength of 28 days were the highest in the order of artificial lightweight aggregate concrete manufactured using H <L1 <T L2 aggregates. This is the fracture load value of light aggregate (H H; 421.8N, L1; 575.3N). , Company A; 685.9N, L2; 695.0N).

5. Freeze thawing resistance

In order to examine the durability of concrete according to the type of artificial lightweight aggregate, freeze-thaw resistance test (KS F 2456, B-type) and relative dynamic modulus test (KS F 2437) were performed and the results are shown in FIG.

The freeze-thawing cycles when the relative dynamic modulus of artificial lightweight aggregate concrete fell below 60% were 201 cycles for L1, 216cycles for L2, 135cycles for H, and 29cycles for T. The freeze-thawing resistance of lightweight aggregate concrete using L2 aggregates was relatively high, which is less absorbent than other lightweight aggregates (L1; H; T. 18.39%; 19.73%; 28.94%) (3.15%). The expansion pressure caused by the freezing of water in the voids is relatively low.

Claims (7)

Insulation material composed of cement, fine aggregate, coarse aggregate, admixture and water,
As the aggregate, the aggregate is a mixture of bottom ash, waste glass, and foaming agent, which is a mixture of 1.12, water absorptive rate of 2.88%, and a lightweight aggregate having a size of 0.6-5 mm.
The thermal aggregate (W / m? K) 0.071 ~ 0.079, the dry density (g / cm ³ ) 0.56 ~ 0.78, the absorption rate (%) 3.15 ~ 18.39, fracture load (N) 575.0 ~ 695.0, porosity (%) of 64.87 ~ 77.33 physical properties, mixed with a lightweight aggregate having a size of 5 ~ 20㎜,
The bottom ash and waste glass, characterized in that the mixture comprises 20 to 60% by weight, fine aggregate 1 to 40% by weight, coarse aggregate 1 to 40% by weight, polycarboxylic acid 0.01 to 2% by weight and the remaining amount of water. Exterior heat insulation for construction using lightweight aggregate manufactured.
The method of claim 1,
The light aggregate used as coarse aggregate and coarse aggregate is formed into pellets by adding a caking additive to a mixture of bottom ash, waste glass and blowing agent, and coated the surface of the molded product with waste glass powder, and then in a rotary kiln. Exterior heat insulating material for construction using light weight aggregates made of bottom ash and waste glass, characterized in that the light weight aggregate formed with pores inside the fired.


delete delete The method of claim 1,
The fine aggregate and coarse aggregate is a building exterior heat insulating material using a light weight aggregate made of bottom ash and waste glass, characterized in that the ratio of 80:20 to 20:80 by weight ratio. delete delete

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