KR102177877B1 - Geopolymer thermoelectric composite comprising conductive filler - Google Patents

Abstract

A geopolymer binder containing fly ash, blast furnace slag, and an activator; And a conductive filler dispersed in the geopolymer binder.

Description

Geopolymer thermoelectric composite containing a conductive filler {GEOPOLYMER THERMOELECTRIC COMPOSITE COMPRISING CONDUCTIVE FILLER}

In the present specification, a geopolymer thermoelectric composite including a conductive filler is disclosed.

Recently, the demand for eco-friendly and continuous energy production is increasing due to the energy reduction problem. Energy harvesting technology that produces electricity that can be utilized by using energy that is wasted or weakly generated in daily life is being researched and developed in various ways in conjunction with recent advances in material technology. A characteristic that was previously impossible to manifest has been transformed into a customized special material for electricity production, enabling more efficient energy harvesting.

One of these energy harvesting fields is a thermoelectric method that uses waste heat to generate electricity. Thermoelectric materials developed so far have often increased electrical conductivity by mixing various conductive fillers (carbon nanotubes, graphene, carbon fibers, graphite, graphite, steel fibers, etc.) into existing materials. Due to the nature of thermoelectric properties, high efficiency is achieved when the electrical conductivity of the material is high and the thermal conductivity is low, but in most cases, when the conductive filler is mixed, the electrical conductivity and thermal conductivity are increased together, making it difficult to develop a high-efficiency thermoelectric material.

In addition, the thermoelectric energy harvesting technique, which generates energy by using the temperature difference between the two sections, generates higher efficiency when the temperature difference is large. Therefore, it is often exposed to a very high level of high temperature, but the resulting thermal decomposition or thermal fatigue of the crystal causes cracking and deterioration of durability of the material. Thermoelectric materials to withstand this are very expensive in price because they can produce energy and have strong durability to withstand high temperature differences.

In places such as power plants, incinerators, and near air conditioners, heating fans, heat up to 200 to 300 degrees is generated when driven, and most of them are wasted as waste heat. In order to convert such waste heat into energy, a thermoelectric material that is inexpensive, can be manufactured on a large scale, and can withstand exposed outdoor air is required. Accordingly, there is a growing need for development of thermoelectric composites having such physical properties.

KR 10-1687349 B1 KR 10-2015-0085992 A KR 10-1399952 B1 PCT WO2013-119287 A1

Embodiments of the present invention are intended to provide an eco-friendly thermoelectric composite.

Embodiments of the present invention are intended to provide an excellent thermoelectric material having strong durability even at a high temperature difference.

In one embodiment of the present invention, fly ash, blast furnace slag, and geopolymer binder containing an activator; And a conductive filler dispersed in the geopolymer binder. A geopolymer thermoelectric composite or a geopolymer conductive composite is provided.

In an exemplary embodiment, the conductive filler is single-walled carbon nanotube (SWCNT), multi-walled carbon nanotube (MWCNT), graphite, graphene, carbon fiber, carbon black, graphite, and It may include one or more selected from the group consisting of steel fibers and the like.

In an exemplary embodiment, the conductive filler may be included in an amount of 1 to less than 3% by weight based on the total weight of the composite.

In an exemplary embodiment, the geopolymer composite may include 50 to 70% by weight of the fly ash and 30 to 50% by weight of the blast furnace slag based on the total weight of the composite.

In an exemplary embodiment, the fly ash and blast furnace slag may be included in a weight ratio of 5:5 to 7:3.

In an exemplary embodiment, the activator may include at least one of sodium hydroxide (NaOH) and sodium silicate.

In an exemplary embodiment, the activator may include 0.01 to 0.05% by weight of sodium hydroxide and 0.4 to 0.6% by weight of sodium silicate based on the total weight of the complex.

In another embodiment of the invention, preparing an activator; Mixing fly ash, blast furnace slag, an activator, and a conductive filler; And curing the mixture; containing, a method for producing a geopolymer composite is provided.

In an exemplary embodiment, the step of preparing the activator may include mixing water, sodium hydroxide, and sodium silicate.

In an exemplary embodiment, the mixing may include mixing the fly ash, blast furnace slag, conductive filler, and activator for 1 to 10 minutes.

In an exemplary embodiment, the mixing may include dry mixing the fly ash, blast furnace slag, and the conductive filler for 1 to 3 minutes, and mixing the activator for 3 to 10 minutes. have.

In an exemplary embodiment, the curing step may be curing for 48 to 72 hours at a temperature of 50 to 60°C.

The geopolymer composite according to an embodiment of the present invention has high electrical conductivity, low thermal conductivity, and strong durability at high temperatures compared to general materials, and from these properties, it can be effectively applied to energy harvesting of various structures. Accordingly, it can be widely used in the field of thermoelectric materials.

1 shows the geopolymer composite specimen of Example 1.
2 shows a graph comparing electrical conductivity according to the content of a conductive filler in a geopolymer composite specimen according to an embodiment of the present invention.
3 shows a graph comparing thermal conductivity according to the content of a conductive filler in a geopolymer composite specimen according to an embodiment of the present invention.
4A is a schematic diagram of a method for evaluating thermoelectric properties of a geopolymer composite specimen.
4B shows a measurement process for evaluating thermoelectric properties of a geopolymer composite specimen.
5 is a graph showing a comparison of the Zieback constant of Constantan material with existing literature values as a result of performing calibration to verify the effectiveness of the thermoelectric property measuring equipment.
6 shows a result of measuring thermoelectric properties of a geopolymer composite specimen according to an embodiment of the present invention.
7 shows the results of measuring the compressive strength according to the content of the conductive filler in the geopolymer composite specimen according to an embodiment of the present invention.
8 shows a graph comparing thermoelectric properties according to the content of a conductive filler in a geopolymer composite specimen according to an embodiment of the present invention.

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

The embodiments of the present invention disclosed in the text are exemplified for purposes of explanation only, and the embodiments of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in the text. .

The present invention is not intended to limit the present invention to a specific disclosed form, as various changes can be added and various forms may be added, and all changes, equivalents or substitutes included in the spirit and scope of the present invention It should be understood to include.

In the present specification, the term "lead tap" refers to a portion of the electrode terminals (taps) drawn out from the electrode group of the secondary battery exposed to the outside of the outer packaging material.

In the present specification, “geopolymer” refers to a material having a binder property produced by an activation reaction of industrial by-products including alumina and silica components by a metallic alkali in a liquid state.

Geopolymer composite

An embodiment according to the present invention is a geopolymer binder including fly ash, blast furnace slag, and an activator; It provides a geopolymer thermoelectric composite comprising; and a conductive filler dispersed in the geopolymer binder.

Another embodiment according to the present invention is a geopolymer binder comprising fly ash, blast furnace slag, and an activator; It provides a geopolymer conductive composite containing; and a conductive filler dispersed in the geopolymer binder.

In one embodiment, the conductive filler is single-walled carbon nanotube (SWCNT), multi-walled carbon nanotube (MWCNT), graphite, graphene, carbon fiber, carbon black, graphite and steel fiber It may include one or more selected from the group consisting of, etc.

In one embodiment, the geopolymer composite may be a composite prepared by mixing a conductive filler into a geopolymer binder that induces a geopolymerization reaction (geopolymerization) by mixing an activator in fly ash and slag, which are industrial by-products.

In one embodiment, the conductive filler may be included in an amount of 0.3 to less than 3% by weight based on the total weight of the composite. Specifically, it may be included in less than 1 to 3% by weight. For example, when the conductive filler is included in an amount of less than 0.3% by weight based on the total weight of the composite, the effect of improving conductivity may be insufficient, and when it is included in an amount of 3% by weight or more, durability may be weak.

In particular, when the conductive filler is included in an amount of less than 1% by weight based on the total weight of the composite, the composite may not be able to implement thermoelectric performance. Accordingly, the geopolymer thermoelectric composite according to the present invention may contain a conductive filler in an amount of 1% by weight or more.

In one embodiment, the geopolymer composite may include 50 to 70% by weight of the fly ash and 30 to 50% by weight of the blast furnace slag based on the total weight of the composite. When 50 to 70% by weight of the fly ash and 30 to 50% by weight of the blast furnace slag are included, the heat resistance and durability of the geopolymer composite may be strong.

For example, the fly ash and blast furnace slag may be obtained as power plant waste, and may be relatively inexpensive and eco-friendly thermoelectric materials. In addition, the fly ash and blast furnace slag may react with an activator and a geopolymer. The geopolymer composite thus obtained may have a feature of having less performance reduction even when repeatedly exposed to high temperatures by using a geopolymer having strong heat resistance as a binder. In particular, the properties of the raw material of the geopolymer are by-products generated when pig iron is separated from iron ore, and are rich in SiO ₂ and Al ₂ O ₃ components, and are capable of withstanding high temperatures of 300°C or higher.

In one embodiment, the fly ash and the blast furnace slag may be included in a weight ratio of 5:5 to 10:0, specifically, the fly ash and the blast furnace slag may be included in a weight ratio of 5:5 to 7:3. For example, when the fly ash and blast furnace slag are included in a weight ratio of less than 5:5 or a weight ratio exceeding 7:3, the heat resistance durability of the geopolymer composite may be weak.

In one embodiment, the activator may include at least one of sodium hydroxide (NaOH) and sodium silicate.

In one embodiment, the molar ratio of SiO ₂ /Na ₂ O of the activator may be 0.90 to 1.05. When the SiO ₂ /Na ₂ O molar ratio is 0.90 to 1.05, the geopolymer reactivity is excellent, and it may have excellent durability properties, such as excellent compressive strength.

In one embodiment, the activator may include 0.01 to 0.05% by weight of sodium hydroxide and 0.4 to 0.6% by weight of sodium silicate based on the total weight of the composite. For example, when sodium hydroxide and sodium silicate are included in the above ranges in the activator, rapid setting of the geopolymer may be prevented, and thus an excellent effect of enhancing the strength of the geopolymer binder may be obtained.

In one embodiment, the geopolymer composite according to the present invention has high electrical conductivity and low thermal conductivity, so it can have excellent thermoelectric material properties, and thus can be applied as an excellent thermoelectric material in the production of thermoelectric energy.

In addition, it can be used as a self-power plant material in parts that are difficult to measure by directly supplying power, such as underground heat pipes and building pipes.

It can be used as a self-powered material in areas that require monitoring, such as underground heating pipes and building pipes, but difficult to measure by applying power.

In one embodiment, the geopolymer composite according to the present invention may have excellent electrical conduction characteristics, and thus may be applied to a heating effect (joule heating), a cooling effect using thermoelectric properties, for example, a refrigeration device.

Method for producing a geopolymer composite.

An embodiment according to the present invention comprises the steps of preparing an activator; Mixing fly ash, blast furnace slag, an activator, and a conductive filler; It provides a method for producing a geopolymer composite comprising; and curing the mixture.

In one embodiment, the step of preparing the activator may include mixing water, sodium hydroxide, and sodium silicate. For example, the activator may be prepared by mixing water and NaOH in an amount of 0.01 to 0.05% by weight, and then 0.4 to 0.6% by weight of sodium hydroxide.

In one embodiment, the mixing may be to mix the fly ash, blast furnace slag, conductive filler, and activator for 1 to 10 minutes.

In one embodiment, the mixing step may include dry mixing the fly ash, blast furnace slag, and the conductive filler for 1 to 3 minutes, and mixing the activator for 3 to 10 minutes. . For example, in the mixing step, 50 to 70% by weight of fly ash, 30 to 50% by weight of blast furnace slag, and 0.1 to 3.0% by weight of a conductive filler are mixed for 1 minute to 3 minutes, and the activator is 40 to After mixing 90% by weight, it may be mixed for 3 to 10 minutes. For example, when dry mixing is performed for 1 to 3 minutes, the conductive filler may be evenly dispersed on the geopolymer binder. For example, when the activator is mixed and mixed for 3 to 10 minutes, an excellent geopolymer hydration reaction is possible, and a geopolymer composite having excellent durability can be obtained.

In one embodiment, the mixture can be cured in a variety of ways commonly used in making geopolymer composites. Specifically, it may be cured by a method of curing in an oven (about 50-60°C), a method of curing at room temperature (about 18-25°C), or a method of drying at room temperature and then depositing in water by demineralization.

Specifically, the curing step may be curing for 3 hours to 28 days at a temperature of 18 to 25°C. Alternatively, the curing step may be cured for 3 to 24 hours at a temperature of 18 to 25° C. and then deyounged and precipitated in water to cure for 1 to 28 days.

In one embodiment, the curing step may be curing for 48 to 72 hours at a temperature of 50 to 60 °C. For example, in the case of curing in a temperature range of 50 to 60°C, the binder matrix is sufficiently cured to obtain a geopolymer composite having excellent durability. For example, when cured for 48 to 72 hours, the cured geopolymer composite may have excellent durability.

In one embodiment, the curing may be poured into a heat-only mold, wrapped, and then cured at room temperature or in an oven. For example, in the case of curing in an oven, it may be cured at room temperature for about 24 hours, and then cured in an oven after removing the mold and wrapping again, preferably curing at a temperature of 50 to 60° C. for 48 to 72 hours. I can.

Hereinafter, the configuration and effects of the present invention will be described in more detail with reference to examples. However, these examples are provided for illustrative purposes only to aid understanding of the present invention, and the scope and scope of the present invention are not limited by the following examples.

Example

[Production Example 1] Preparation of Geopolymer Composite

After adding 160 g of NaOH to 1 kg of water and mixing at room temperature for about 1 minute, 580 g of sodium silicate was added and mixed at room temperature for about 1 minute to prepare an alkali activator. Then, 150 g of slag and 150 g of fly ash were added to a separate bowl with CNT, a conductive filler, in the same amount as in Table 1, followed by dry mixing, followed by mixing the prepared alkali activator and mixing for 3 minutes. All manufacturing processes were performed at room temperature (about 23 degrees). The prepared mixture was poured into a mold, allowed to stand at room temperature (about 23 degrees) for 24 hours, and then dried. In order to reduce moisture loss after denitration, a thermoelectric composite was prepared by wrapping it in a wrap and curing in an oven at 30 degrees for 3 days. The prepared specimen is shown in FIG. 1.

Sample CNT content (% by weight) Comparative Example 1 0.0 Comparative Example 2 0.1 Comparative Example 3 0.5 Example 1 1.0 Example 2 2.0 Example 3 3.0

[Test Example 1] Evaluation of electrical conductivity performance according to conductive filler content

In order to measure the electrical conductivity, a two probe method was applied in which silver nano paste was applied on both sides of the specimen, and then two probes connected to the multimeter were brought into contact with the surface of the specimen coated with the silver nano paste. At this time, the measured resistivity was multiplied by the length of each area, and then the area to which the silver nano paste was applied was divided to calculate the resistance. The electrical conductivity was determined by taking the reciprocal of the resistance value recorded as above.

Electrical conductivity of the geopolymer composites according to Examples 1 to 3 and Comparative Examples 1 to 3 in which the content of CNTs was varied as a conductive filler was measured, and the results are shown in Table 2 below. Here, the lower the measured resistance value, the higher the electrical conductivity.

Sample CNT content (% by weight) Resistance (Ω×cm) Comparative Example 1 0.0 1794333.00 Comparative Example 2 0.1 2286.33 Comparative Example 3 0.5 481.90 Example 1 1.0 121.80 Example 2 2.0 55.33 Example 3 3.0 35.00

As a result of the test, it was confirmed that excellent electrical conductivity can be obtained when CNT is contained in an amount of less than 1 to 3% by weight based on the total weight of the composite. In particular, in Example 2 (2.0% by weight), it can be seen that the resistance is only 55.33 Ω×cm, which has an excellent effect.

2 shows a graph comparing the electrical conductivity of the geopolymer composite specimen while varying the content of CNT, and it was confirmed that the electrical conductivity value increased as the content of CNT increased. In particular, it can be seen that the geopolymer composite specimen of Example 3 (containing 3.0% by weight of CNT) has an electrical conductivity of about 50,000 times higher than that of the specimen of Comparative Example 1 (without CNT). Therefore, it can be seen that the geopolymer composite according to the present invention has a higher electrical conductivity than that of a general material.

[Test Example 2] Evaluation of thermal conductivity performance according to conductive filler content

Power factor = σS ² (μWm ^-1 K ^-2 )

Here, σ = electrical conductivity (S cm ^-1 ), S = Seebeck coefficient (μV K ^-1 ).

The thermal conductivity of the sample was measured using a commercial device, ULVAC's ZEM-3. The electrical conductivity at each temperature was measured by the 4-terminal method, and the temperature difference applied to the sample when measuring the Seebeck coefficient at each temperature was +5 ℃ ~ 5 ℃, and the calibration was performed using Constantan provided by the manufacturer. And all measurements were carried out at atmospheric pressure in a nitrogen environment sufficiently substituted with high purity nitrogen in the measurement chamber. The thermal conductivity measurement results are shown in FIG. 3.

3 shows a graph comparing the thermal conductivity according to the content of the conductive filler in the geopolymer composite specimen according to the embodiment of the present invention, and it was confirmed that the change in the thermal conductivity value according to the increase of the CNT content was insignificant.

When synthesizing the results of Test Example 1 and Test Example 2, in general, when the conductive filler is contained, the thermal conductivity and the electrical conductivity are improved together and the thermoelectric efficiency is lowered, whereas the geopolymer composite according to the present invention has an improved electrical conductivity. On the other hand, the thermal conductivity has a characteristic that does not change significantly, and accordingly, it was confirmed that it has excellent thermoelectric properties when applied to a thermoelectric device.

[Test Example 3] Performance evaluation of geopolymer composite

3-1 Validation of measuring equipment

Metal conductors, alloys, and solders used in all electronic measuring equipment have large and small Seebeck coefficients (parasitic Seebeck coefficients of measuring devices). Therefore, in order to measure the exact thermoelectric properties of the sample to be measured, calibration in consideration of the parasitic Seebeck coefficient of the measuring device must be performed.

The reference sample used for this calibration was performed with Constantan (2.935 mm x 2.941 mm x 23 mm, Seebeck coefficient +40 μV K-1 at room temperature) provided by the ULVAC manufacturer.

Here, Constantan refers to a copper-nickel alloy used in a thermocouple for measuring E, J, and T types widely used commercially. Therefore, it is a verified sample in which the thermoelectric power according to the temperature difference and the Seebeck coefficient at each temperature have been converted into data according to standard standards such as KS and JIS.

The actual calibration procedure is to measure Constantan using the thermoelectric performance measuring device ZEM-3, and then extract the difference from the literature value to derive the parasitic Seebeck coefficient of the measuring device. Next, after measuring the thermoelectric characteristics of the sample to be measured using ZEM-3, the effect of the parasitic Seebeck coefficient of the measuring device is subtracted to derive the actual thermoelectric characteristics of the sample (see FIGS. 4A and 4B) .

5 shows the results of verifying the effectiveness of the measuring equipment before the test prior to the thermoelectric performance evaluation of the thermoelectric specimen according to an embodiment of the present invention. As a result of the verification, it was confirmed that the material of Constantan, which the Jibaek constant used as a reference, was consistent with the existing literature. From this, it could be confirmed that the measuring equipment was effective in the performance evaluation of other specimens.

In addition, Figure 6 shows the results of measuring the thermoelectric properties of the geopolymer composite specimen according to an embodiment of the present invention, referring to Figure 6, it can be seen that the power factor representing the thermoelectric performance increases as the temperature increases. have. In addition, it can be seen that the Jibaek constant and electrical conductivity exhibit similar behavior.

On the other hand, the geopolymer composite specimen of Comparative Example 1 was not measured because the power factor was too small. From this, it was confirmed that the geopolymer composite specimen of Comparative Example 1 is inappropriate for use as a thermoelectric material.

In addition, it can be seen from FIG. 6 that the performance varies in a specific temperature section, which means that a difference in thermoelectric performance may occur depending on the amount of the conductive filler in the composition. The thermoelectric performance test result according to the mixing ratio was confirmed in detail in Test Example 3 described later.

3-2 Evaluation of compressive strength

Geopolymer composites according to Preparation Example 1 were subjected to a load at a rate of 1.2±0.3 mm/min in a compression tester until the specimen was destroyed, and the maximum load of the tester that appeared when the specimen was destroyed was read up to three significant figures. The fracture load and cross-sectional area were calculated, and the correction strength was calculated by applying a correction factor of 0.97.

The evaluation results are shown in FIG. 7, and it was confirmed that the compressive strength of the prepared geopolymer composite specimen decreased as the content of CNT increased. Therefore, excessively increasing the content of the conductive filler is not desirable because it is disadvantageous in terms of durability, and an appropriate level of the conductive filler content needs to be set.

[Test Example 2] Evaluation of thermoelectric performance according to conductive filler content

The thermoelectric performance of the geopolymer composites according to Example 2 (containing 2.0% by weight of the conductive filler) and Example 3 (containing 3.0% by weight of the conductive filler) was measured in the same manner as in Test Example 1.

8 shows a graph comparing thermoelectric properties according to the content of a conductive filler in a geopolymer composite specimen according to an embodiment of the present invention. Referring to FIG. 8, when 2% by weight of CNT was contained as a conductive filler, it was confirmed that resistance was significantly reduced and thermoelectric performance was improved.

In addition, when 3% by weight of CNT is contained, it can be seen that the viscosity of the prepared specimen is high, making it difficult to handle and heterogeneous, the tendency of electrical conductivity is not constant, and the thermoelectric performance is poor.

On the other hand, when it contained less than 1% by weight of CNT, it was confirmed that it was impossible to implement thermoelectric performance.

Accordingly, it can be seen that the geopolymer composite according to the present invention has high electrical conductivity and low thermal conductivity compared to general materials when it contains a conductive filler of 0.3 to 3.0% by weight, and thus has excellent thermoelectric performance.

[ Experimental example 3] With slag Fly ash Electrical conductivity performance evaluation according to mixing ratio

A geopolymer composite was prepared in the same manner as in Preparation Example 1 except that the mixing ratio of slag and fly ash was changed from 5:5 to 3:7 and 0:10, respectively. Table 3 shows the same mixing ratio of slag and fly ash as in Preparation Example 1, and Table 4 shows the mixing ratio of slag and fly ash as 3:7, and Table 5 has the mixing ratio of 0:10.

Slag: Fly ash = 5:5 1 kg of water CNT content Resistance (Ω × cm) Comparative Example 1 0 1794333.00 Comparative Example 2 0.1 2286.33 Comparative Example 3 0.5 481.90 Example 1 1.0 121.80 Example 2 2.0 55.33 Example 3 3.0 35.00

Slag: Fly ash = 3:7 1 kg of water CNT content Resistance (Ω × cm) Example 4 0 159625.8 Example 5 0.1 67978.6 Example 6 0.5 2106.1 Example 7 1.0 283.0 Example 8 2.0 111.3 3.0 46.8

Slag: Fly ash = 0:10 1 kg of water CNT content Resistance (Ω × cm) Example 9 0 112995.6 Example 10 0.1 10124.9 Example 11 0.5 3264.4 Example 12 1.0 410.9 Example 13 2.0 183.6 Example 14 3.0 57.2

By evaluating the electrical conductivity performance according to the mixing ratio of slag and fly ash, it was confirmed that when the slag and fly ash were mixed in a weight ratio of 5:5 and 0:10, they had excellent electrical conductivity.

The embodiments of the present invention described above should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

Claims (16)

As a geopolymer composite,
A geopolymer binder containing fly ash, blast furnace slag, and an activator; And
And a conductive filler dispersed in the geopolymer binder, wherein the geopolymer composite is a geopolymer thermoelectric composite. As a geopolymer composite,
A geopolymer binder containing fly ash, blast furnace slag, and an activator; And
Includes; a conductive filler dispersed in the geopolymer binder, wherein the geopolymer composite is a geopolymer conductive composite, geopolymer composite. The method according to claim 1 or 2,
The conductive filler is composed of single-walled carbon nanotube (SWCNT), multi-walled carbon nanotube (MWCNT), graphite, graphene, carbon fiber, carbon black, graphite, and steel fiber. Geopolymer composite comprising one or more selected from the group. The method according to claim 1 or 2,
The conductive filler is contained in an amount of 0.3 to less than 3% by weight based on the total weight of the composite, geopolymer composite. The method according to claim 1 or 2,
The geopolymer composite comprises 50% by weight or more to less than 70% by weight of the fly ash, and 30% by weight or more to less than 50% by weight of the blast furnace slag based on the total weight of the composite. The method according to claim 1 or 2,
The fly ash and blast furnace slag are included in a weight ratio of 5:5 to 10:0, a geopolymer composite. The method according to claim 1 or 2,
The activating agent comprises at least one of sodium hydroxide (NaOH) and sodium silicate (sodium silicate), geopolymer composite. delete The method of claim 7,
The activator comprises 0.01 to 0.05% by weight of sodium hydroxide and 0.4 to 0.6% by weight of sodium silicate based on the total weight of the composite, geopolymer composite. Preparing an activator;
Mixing fly ash, blast furnace slag, an activator, and a conductive filler; And
Curing the mixture; containing, a method for producing a geopolymer composite. The method of claim 10,
The step of preparing the activator comprises mixing water, sodium hydroxide, and sodium silicate. The method of claim 10,
The mixing step is to mix the fly ash, blast furnace slag, a conductive filler, and an activator for 1 to 10 minutes, a method for producing a geopolymer composite. The method of claim 10,
The mixing step is to dry mixing the fly ash, the blast furnace slag, and the conductive filler for 1 to 3 minutes (dry mixing), and mixing the activator for 3 to 10 minutes, the method of manufacturing a geopolymer composite . The method of claim 10,
The curing step is to cure for 48 to 72 hours at a temperature of 50 to 60 ℃, geopolymer composite manufacturing method. The method of claim 10,
The curing step is to cure for 3 hours to 28 days at a temperature of 18 to 25 ℃, geopolymer composite manufacturing method. The method of claim 10,
The curing step is to cure for 3 to 24 hours at a temperature of 18 to 25 °C and then demineralized and precipitated in water to cure for 1 to 28 days.

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