Method for producing geopolymer compositions

Abstract

To rationally produce geopolymer compositions that have high self-filling properties.SOLUTION: A method for producing a geopolymer composition obtained by mixing water, fine aggregate, a fly ash, an aqueous alkaline activating agent solution and a water reducer includes a step of changing a weight condition with respect to the water, the fine aggregate, the fly ash, the aqueous alkaline activating agent solution and the water reducer into a volume condition to thereby calculate compounding ratios thereof.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a method for producing a geopolymer composition.

Background Art

[0002] Conventionally, mortars and concretes using cement as a material are known. Also, in mortars using cement, so-called self-compacting mortars that mix with aggregates without being compacted after placement are known. Further, geopolymer mortars are known as mortars that do not use cement. Patent Document 1 discloses a technique for producing a geopolymer mortar by mixing fly ash and blast furnace slag fine powder as active fillers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, when using cement, carbon dioxide emissions become a problem. Therefore, in recent years, development of geopolymer mortars that do not use cement and do not require compaction after placement has been carried out. However, sufficient consideration has not yet been given to the formulation design of the materials used in geopolymer mortars.

[0005] An object of the present invention is to rationally produce a geopolymer composition having high self-compacting properties.

Means for Solving the Problems

[0006] The invention disclosed in the present application has various aspects to solve the above problems, and an outline of representative ones of these aspects is as follows.

[0007] (1) A method for producing a geopolymer composition obtained by mixing water, fine aggregate, fly ash, an aqueous solution of an alkaline activator, and a water-reducing agent, comprising the step of converting the weight conditions for the water, the fine aggregate, the fly ash, the aqueous solution of the alkaline activator, and the water-reducing agent into volume conditions and calculating their blending ratio.

[0008] (2) A method for producing a geopolymer composition, comprising the step of setting a parameter set before performing the step of calculating the blending ratio in (1), wherein the parameter set is a first equation relating to the weight ratio of the fly ash to the aqueous solution of the alkaline activator, a second equation relating to the weight ratio of the fine aggregate to the fly ash, a third equation relating to the weight ratio of the fly ash to the water-reducing agent, a fourth equation relating to the weight ratio of the fly ash to the water, and a fifth equation relating to the weight ratio of solid matter to the water, and the weight condition is a condition based on the parameter set.

[0009] (3)(2) A method for producing a geopolymer composition, wherein the step of setting the parameter set includes setting a first parameter set which is the first equation and the second equation, and setting a second parameter set which is the third equation, the fourth equation and the fifth equation.

[0010] (4)(2) or (3), the method for producing a geopolymer composition, wherein the aqueous solution of the alkaline activator contains sodium hydroxide and silicon dioxide, and after the step of calculating the blending ratio, the method includes a step of determining whether the molar ratio of sodium hydroxide to silicon dioxide and the molar ratio of water to sodium hydroxide satisfy predetermined requirements, and if it is determined in the determination step that the predetermined requirements are not satisfied, the concentration of the aqueous solution of the alkaline activator is changed and the step of calculating the blending ratio is repeated.

[0011] A method for producing a geopolymer composition, wherein in the determination step, if it is determined that the predetermined requirements are met, the method includes a step of verifying whether the flow value is greater than or equal to a predetermined value, and if it is determined in the verification step that the flow value is less than the predetermined value, the method again includes adding water and setting the second set of parameters.

[0012] A method for producing a geopolymer composition, wherein in the step of calculating the blending ratio in any of (1) to (5), the blending ratio is calculated by solving a determinant representing the volume condition based on a determinant representing the weight condition and a determinant representing the density conditions for the water, the fine aggregate, the fly ash, the alkaline activator aqueous solution, and the water-reducing agent.

[0013] (7) A method for producing a geopolymer composition in any of (1) to (6), wherein the geopolymer composition does not contain any active fillers other than the fly ash. [Effects of the Invention]

[0014] According to aspects (1) to (7) of the present invention described above, a geopolymer composition having high self-compacting properties can be rationally produced. [Brief explanation of the drawing]

[0015] [Figure 1] This is a flowchart showing the method for determining the formulation. [Figure 2] This is a flowchart showing the method for determining the formulation. [Figure 3] This is a flowchart showing the method for determining the formulation. [Modes for carrying out the invention]

[0016] Hereinafter, embodiments of the present invention (hereinafter referred to as "this embodiment") will be described in detail with reference to the drawings.

[0017] The geopolymer mortar, which is the geopolymer composition of this embodiment, is made by mixing water, silica sand as fine aggregate, fly ash as an active filler, caustic soda and water glass as alkaline activators, and a high-performance water-reducing agent. Geopolymer is a general term for amorphous condensed polymers that harden through the reaction of an active filler with an alkaline aqueous solution.

[0018] The following describes each of the materials included in the geopolymer mortar in this embodiment.

[0019] [Activated filler] Fly ash, an active filler, is the fine ash recovered from exhaust gas by dust collectors, etc., from coal ash generated when pulverized coal is burned at coal-fired power plants. The main components of fly ash are silicon dioxide (SiO2), alumina (Al2O3), etc. Fly ash is standardized into types I to IV in the Japanese Industrial Standards (JIS A 6201) based on particle size and flow value. Fly ash classified as type I or II is preferred as a material for geopolymer mortar. The flow value is a value that indicates fluidity, and it is a value that indicates the amount of fluid spread under specific conditions. In this embodiment, the unit of the flow value is [mm], and the larger this value, the higher the fluidity.

[0020] In this embodiment, only fly ash is used as the active filler, and other powders such as blast furnace slag are not used. This improves the fluidity of the geopolymer mortar and extends its pot life. This is because fly ash has a shape closer to a sphere than blast furnace slag.

[0021] [Fine aggregate] Silica sand, used as fine aggregate, is a sandy substance composed mainly of minerals with silicon dioxide (SiO2) as its primary component. Silica sand is classified according to particle size in the Japanese Industrial Standards (JIS G 5901). In this embodiment, silica sand of type 5 as defined in the Japanese Industrial Standards was used. However, the type of silica sand used is not limited to this classification.

[0022] [Alkaline activator] In this embodiment, an alkaline aqueous solution (hereinafter also referred to as the alkaline activator aqueous solution) was used as the alkaline activator. Specifically, caustic soda (NaOH) and water glass (Na2SiO3) were used. However, the invention is not limited to this, and other alkaline aqueous solutions such as potassium hydroxide (KOH) and potassium silicate (K2SiO3) may also be used. The type and concentration of the alkaline activator affect the mechanical properties of the geopolymer mortar. A high concentration of the alkaline activator improves the strength of the geopolymer mortar, but reduces its fluidity. Commercially available alkaline activator aqueous solutions may be used.

[0023] [Water-reducing agent] In this embodiment, a polycarboxylic acid-based high-performance water-reducing agent was used as the water-reducing agent. The high-performance water-reducing agent is an admixture that improves water-reducing performance. That is, the high-performance water-reducing agent is an admixture that ensures fluidity while reducing the amount of water required. Alternatively, a high-performance AE water-reducing agent with an air-volume adjustment function may be used as the high-performance water-reducing agent.

[0024] [Combination design] The following explains the formulation design for each of the materials mentioned above. Formulation design refers to determining the proportion of each material to be used.

[0025] In conventional mortars and concretes, compaction work was necessary to achieve sufficient filling. Compaction work is performed by applying vibrations or other external forces. From the standpoint of ease of construction, it is desirable to have mortars and concretes that mix with aggregates etc. without compaction work, or with minimal work. Furthermore, in the case of geopolymer mortar, since a highly concentrated alkaline activator aqueous solution (alkaline aqueous solution), which is a chemical, is used, it is preferable from a safety standpoint to not require manual compaction work, or to require minimal work. To eliminate the need for compaction work, the fluidity of the geopolymer mortar needs to be high. On the other hand, geopolymer mortar needs to ensure the desired strength. Fluidity and strength depend on the composition of each material. Until now, the composition design of geopolymer mortars has not been sufficiently considered, and there have been no clear guidelines for determining the composition. Therefore, in this embodiment, a method for rationally determining the composition of each material is adopted.

[0026] Referring to Figures 1 to 3, the method for determining the composition of materials contained in the geopolymer mortar in this embodiment will be explained. Figures 1 to 3 are flowcharts showing the method for determining the composition. In this embodiment, the composition of materials was determined under the conditions of a mixing speed of 277 rpm or higher, a mixing time of 300 seconds or higher, and a curing temperature of 50°C to 80°C.

[0027] First, parameter set 1 (the first parameter set) is determined (step S1 in Figure 1). Here, parameter set 1 consists of the weight ratio of fly ash to alkaline activator aqueous solution, and the weight ratio of silica sand to fly ash. In this embodiment, the weight ratio of fly ash to alkaline activator aqueous solution was set to 0.6. Also, the weight ratio of silica sand to fly ash was set to 0.5.

[0028] Here, the weight of NaOH per unit volume is X [kg / m³]. 3 ], the weight per unit volume of Na2SiO3 is Y[kg / m³ 3If we assume that ], then the weight per unit volume of the alkaline activator aqueous solution is X + Y [kg / m³]. 3 ] The weight per unit weight of fly ash is P[kg / m 3 Assuming ], the weight ratio of fly ash to alkaline activator aqueous solution is expressed by the following (Equation 1-1). Furthermore, the equation (first equation) shown in the following (Equation 1-2) can be derived from (Equation 1-1).

[0029]

number

[0030] Furthermore, the weight of silica sand per unit volume is S [kg / m³]. 3 Assuming ], the weight ratio of silica sand to fly ash is expressed by the following equation (Equation 2-1). Furthermore, the equation (second equation) shown in (Equation 2-2) can be derived from (Equation 2-1).

[0031]

number

[0032] Next, you decide whether to prioritize the strength or workability of the geopolymer mortar (step S2 in Figure 1). If you prioritize strength (Yes in step S2), proceed to the flow shown in Figure 2; if you prioritize workability (No in step S2), proceed to the flow shown in Figure 3. Workability refers to how easy the geopolymer mortar is to handle; the higher the fluidity, the better the workability.

[0033] In this embodiment, when prioritizing strength, the objective was to obtain a geopolymer mortar with a flow value of 265 mm or more, a strength of 15 MPa or more 7 days after the start of curing, and a strength of 20 MPa or more 28 days after the start of curing. On the other hand, when prioritizing workability, the objective was to obtain a geopolymer mortar with a flow value of 300 mm or more, a strength of 7 MPa or more 7 days after the start of curing, and a strength of 10 MPa or more 28 days after the start of curing.

[0034] Referring to FIG. 2, the flow when prioritizing strength will be described.

[0035] First, a parameter set 2 (second parameter set) is determined (step S 21 in FIG. 2). Here, the parameter set 2 is the weight ratio of fly ash to the high-performance water reducer, the weight ratio of fly ash to the additional water, and the weight ratio of the solid matter (geopolymer solid) to water. In the present embodiment, the weight ratio of fly ash to the high-performance water reducer is set as k, the weight ratio of fly ash to the additional water is set as l, and the weight ratio of the solid matter to water is set as m. These k, l, and m are arbitrary values and may be appropriately set according to the desired strength and workability. k may be set to about 0.02 to 0.08, l may be set to about 0.05 to 0.1, and m may be set to about 0.3 to 0.45, for example.

[0036] Let the weight per unit volume of the high-performance water reducer be S p [kg / m 3 . Then, the weight ratio of fly ash to the high-performance water reducer is expressed by the following (Equation 3-1). Also, an equation (third equation) shown by (Equation 3-2) is derived from (Equation 3-1).

[0037]

Equation

[0038] Also, let the weight per unit volume of the additional water be W ex [kg / m 3 . Then, the weight ratio of fly ash to the additional water is expressed by the following (Equation 4-1). Also, an equation (fourth equation) shown by (Equation 4-2) is derived from (Equation 4-1). Note that the additional water is pure water and is water other than the water (H 2 O) contained in the aqueous alkali activator solution.

[0039]

Equation

[0040] Also, let the NaOH solid concentration in the NaOH solution at 20 °C be r <000()()()10>Let's assume that the concentration of Na2O in a Na2SiO3 solution at 20°C is r Y1 Let the concentration of SiO2 in the Na2SiO3 solution be r Y2 In that case, the weight per unit volume of the solid (geopolymer solid) is P+r X X+(r Y1 +r Y2 It is represented by Y.

[0041] Also, the weight per unit volume of water is W ex +(1-r X )X+(1-(r Y1 +r Y2 It is represented by Y.

[0042] From these, the weight ratio of solid material (geopolymer solid) to water is expressed by the following equation (5-1). Furthermore, the equation (5th equation) shown in equation (5-2) can be derived from equation (5-1).

[0043]

number

[0044] Here, the sum of the volumes of each material is 1.0 [m³] 3 If we assume ], the formula for volume is expressed as follows (Equation 6). V p The volume of fly ash [m³ 3 ] and V s The volume of silica sand [m³ 3 ] and V w The volume of water [m³] 3 ] and V sp The volume of the water-reducing agent [m³] 3 ] and V X The volume of the NaOH solids [m³] 3 ] and V Y The volume of Na2SiO3 solids [m³] 3 ] and V air is the volume of air [m³ 3 The total volume is 1.0 [m³]. 3 Since ], V p , V s , V w , V sp , VX , V Y , V air This shows the volume ratio of each material contained in the geopolymer mortar.

[0045]

number

[0046] Here, weight is expressed as the product of volume and density. That is, ρ P V P =P, ρ S V S =S, ρ W V W =W ex ρ SP V SP =SP, ρ X V X =X, ρ Y V Y The relationship =Y holds for each case. Here, ρ P ρ is the particle density of fly ash. S ρ is the particle density of silica sand. W ρ is the density of water at 20°C. X ρ is the density of NaOH at 20°C. Y This is the density of Na2SiO3 at 20°C. Note that the weight of air is sufficiently small to be treated as 0.

[0047] In this embodiment, ρ X 1268 [kg / m 3 ], ρ Y 1465 [kg / m 3 ], ρ P 2310 [kg / m 3 ], ρ S 2330 [kg / m 3 ], ρ W to 1000 [kg / m 3 ]

[0048] Next, the concentration of the alkaline activator aqueous solution is determined (step S22 in Figure 2). Specifically, the concentration of NaOH solids in the NaOH solution is determined. X , Na2O concentration r of Na2SiO3 solutionY1 , the SiO2 concentration r of the Na2SiO3 solution Y2 Determine the following. In this embodiment, r X Let r be 0.26. Y1 Let r be 0.13. Y2 We set it to 0.30.

[0049] Next, the design matrix (hereinafter referred to as the D-matrix) shown in (Equation 7-2) is calculated from the determinant shown in (Equation 7-1) below (step S23 in Figure 2). This converts the weight conditions expressed in (Equations 1-2), (Equation 2-2), (Equation 3-2), (Equation 4-2), and (Equation 5-2) above into volume conditions, and the volume ratio of each material is determined. The D-matrix may be solved by a human calculation, or it may be solved by a computer such as a computing device.

[0050]

number

[0051] Here, the volume condition is expressed by the determinant shown in (Equation 8) below.

[0052]

number

[0053] Furthermore, the weight condition is expressed by the determinant shown in (Equation 9) below.

[0054]

number

[0055] Furthermore, the density condition is expressed by the determinant shown in (Equation 10) below, based on (Equation 1-2), (Equation 2-2), (Equation 3-2), (Equation 4-2), (Equation 5-2), and (Equation 7-1) above.

[0056]

number

[0057] Furthermore, after obtaining the volume ratio of each material contained in the geopolymer mortar, the following steps are taken to satisfy the conditions for obtaining the desired strength and workability.

[0058] The total amount of components (chemical substances) is verified based on the molar ratios of Na2O / SiO2 and H2O / Na2O (Step S24). Specifically, it is determined whether the Na2O / SiO2 ratio is 0.16 or higher and the H2O / Na2O ratio is 13 or lower. The molar ratio of Na2O / SiO2 depends on the concentration of the alkaline activator aqueous solution and the weight of the fly ash containing SiO2. The molar ratio of H2O / Na2O also depends on the concentration of the alkaline activator aqueous solution and the weight of the water. The molar ratios of Na2O / SiO2 and H2O / Na2O should be calculated based on the volume ratio calculated by the D-matrix calculation described above and the component ratio of the fly ash.

[0059] If the Na2O / SiO2 ratio is not 0.16 or higher, or the H2O / Na2O ratio is not 13 or lower (No in step S24), the concentrations of the alkaline activator aqueous solution (sodium hydroxide and sodium silicon dioxide) should be adjusted. Then, return to step S23 to derive the volume condition and determine whether the conditions shown in step S24 are met. If the conditions shown in step S24 are met (Yes in step S24), proceed to the next step.

[0060] Finally, the fluidity of the resulting geopolymer mortar is confirmed. In other words, the flow value of the geopolymer mortar is verified. To verify the flow value, geopolymer mortar is manufactured based on the formulation obtained through the processes up to step S24.

[0061] First, mix the fly ash and silica sand for about 60 seconds in an environment of about 20°C. Next, add the alkaline activator aqueous solution and mix for another 60 seconds. Then, add water and mix for another 60 seconds. Finally, add the high-performance water-reducing agent and mix for another 120 seconds. Check the fluidity of the geopolymer mortar produced by these steps. Specifically, verify whether the flow value is 265 [mm] or higher (step S25). If this requirement is not met (No. in step S25), add water (step S26) and set parameter set 2 again (step S21).

[0062] Furthermore, whether or not the flow value conditions are met depends on individual differences in the shape and composition of fly ash and silica sand. Therefore, even if the mixing ratio of each material is appropriate, the desired fluidity is not guaranteed. For this reason, as explained here, it is necessary to verify the flow value of the geopolymer mortar that has actually been produced.

[0063] On the other hand, if workability is prioritized over strength (No. in step S2 of Figure 1), the process proceeds to the flow shown in Figure 3. Steps S31 to S36 shown in Figure 3 are the same as steps S21 to S26 shown in Figure 2, except for the branching conditions. When workability is prioritized, in the step of verifying the total amount of chemical substances based on the molar ratios of Na2O / SiO2 and H2O / Na2O, it is determined whether Na2O / SiO2 is 0.16 or less and H2O / Na2O is 14 or more. In addition, in the step of verifying the flow value of the geopolymer mortar, it is determined whether the flow value is 300 [mm] or more (step S35).

[0064] By using the mixing ratio determination method described above, it is possible to manufacture geopolymer mortar with the desired strength and fluidity according to the application. Therefore, it is possible to manufacture geopolymer mortar with high self-compacting properties while ensuring a certain level of strength. In this embodiment, the procedure for determining the mixing ratio is clear and easy to apply to construction under various conditions.

[0065] Furthermore, in conventional formulation design, the process of determining the mass (weight) of a predetermined component from the molar concentration (mol / L) of an alkaline aqueous solution, and then determining the mass of other components based on the mass ratio (weight ratio) of the predetermined component to other components, was performed for each component. Specifically, for example, the process of determining the mass of sodium from the molar concentration of a sodium hydroxide aqueous solution, and then determining the mass of silicon based on the mass ratio of sodium to silicon, was performed for each component. In contrast, in the formulation design of this embodiment, the desired blending ratio is calculated by solving the above D-matrix using the ratio of each material. In this way, since the blending ratio of each material can be calculated all at once without calculating the ratio for each component, the determination of the blending ratio is rational and simple.

[0066] In conventional geopolymer mortars, it is common to manage each material based on its weight. In this embodiment, since the mixing ratio is determined by converting the weight condition to a volume condition, each material can be managed based on its volume. Therefore, it becomes possible to manage materials while considering air, which is not included in the mixing ratio when managed based on weight. That is, the volume of air (V air This also allows for material management that takes into account the volume required for actual construction. Since the quantity required for actual construction is measured in volume, this embodiment enables material management that is suitable for actual construction.

[0067] In this embodiment, we have described two examples of compound designs depending on whether strength or workability is prioritized, but we are not limited to these, and there may be several patterns depending on the application. In that case, it is advisable to prepare the values ​​shown in steps S24, S34 and steps S24, S35 according to the number of patterns.

[0068] Furthermore, the order of the steps shown in Figures 1 to 3 is not limited to this. Specifically, the steps of setting parameter set 1, setting parameter set 2, and determining the concentration of the alkaline activator aqueous solution are not limited to the order described in this embodiment, and may be performed in any order. Also, parameter set 1 and parameter set 2 do not need to be distinguished.

[0069] Furthermore, although this embodiment uses a self-compacting geopolymer mortar that does not require compaction as an example, it does not necessarily exclude the possibility of compaction.

[0070] [Examples] Next, we will explain the properties of geopolymer mortars with different mixing ratios. Table 1 below shows 21 examples, indicated by mixing IDs F1 to F21. F1 to F21 differ from each other in one of the following: flow value, flow time, volume ratio of water to fly ash, molar ratio Na2O / SiO2, or molar ratio H2O / Na2O. Table 1 also shows the dry density and strength 7 days after the start of curing, the dry density and strength 28 days after the start of curing, and the curing conditions (time and temperature), respectively.

[0071] When strength is the priority, the example shown as F15 in Table 1 is a preferred example because it has a flow value of 265 mm or more and a strength of 20 MPa or more after 28 days from the start of curing. When workability is the priority, the example shown as F10 in Table 1 is a preferred example because it has a flow value of 300 mm or more and a strength of 10 MPa or more after 28 days from the start of curing.

[0072] [Table 1]

[0073] Furthermore, the results of verifying the influence of each parameter based on each example are shown in Table 2 below.

[0074] [Table 2] TIFF0007837531000013.tif121164

[0075] From Tables 1 and 2 above, the following can be seen regarding the mixing ratio of each material.

[0076] According to F8, F9, F1, F2, F3, F5, and F6 shown in Tables 1 and 2, the weight ratio of solid material (geopolymer solid) to water (W / GPS) has a significant impact on the fluidity (flow value) of the geopolymer mortar.

[0077] According to F8, F9, F1, and F11 shown in Tables 1 and 2, the weight ratio of fly ash to high-performance water-reducing agent (S p / P) affects the fluidity (flow value) of the geopolymer mortar, but not to the same extent as the weight ratio of solids to water (W / GPS).

[0078] According to F2, F3, and F5 shown in Tables 1 and 2, the molar concentration of NaOH has a greater effect on flow velocity than on fluidity. As the molar concentration of NaOH increases, the fluidity (flow value) decreases. This is thought to be because as the molar concentration of NaOH increases, the water content decreases and the viscosity increases.

[0079] According to F8, F9, F3, and F5 shown in Tables 1 and 2, an increase in the molar ratio of H2O / Na2O has a positive effect on the fluidity of the geopolymer mortar. Specifically, as the molar ratio of H2O / Na2O increases, the fluidity improves. On the other hand, an increase in the molar ratio of Na2O / SiO2 has a negative effect on the fluidity of the geopolymer mortar. Specifically, as the molar ratio of Na2O / SiO2 increases, the fluidity decreases. This is because the viscosity increases due to the increased alkali content in the geopolymer mortar.

[0080] According to F12, F13, and F14 shown in Tables 1 and 2, the fluidity of the geopolymer mortar improves with increasing weight ratio (P / S) of silica sand to fly ash.

[0081] [Geopolymer concrete] The geopolymer mortar described above hardens when mixed with coarse aggregate such as gravel. This produces geopolymer concrete. As mentioned above, the geopolymer mortar of this embodiment has high fluidity, so the geopolymer mortar and coarse aggregate mix sufficiently without the need for compaction work. Therefore, manual compaction work is unnecessary and safe.

[0082] Although embodiments of the present invention have been described above, the specific configurations shown in these embodiments are merely examples, and the technical scope of the present invention is not intended to be limited thereto. Those skilled in the art may modify these disclosed embodiments as appropriate, and the technical scope of the invention disclosed herein should be understood to include such modifications.

Claims

1. In a method for producing a geopolymer composition obtained by mixing water, fine aggregate, fly ash, an aqueous solution of an alkaline activator, and a water-reducing agent, The process includes converting the weight conditions for the water, the fine aggregate, the fly ash, the aqueous solution of the alkaline activator, and the water-reducing agent into volume conditions and calculating their mixing ratios. A method for producing a geopolymer composition.

2. The step of setting a parameter set before performing the step of calculating the aforementioned blending ratio includes, The parameter set includes a first equation relating to the weight ratio of the fly ash to the alkaline activator aqueous solution, a second equation relating to the weight ratio of the fine aggregate to the fly ash, a third equation relating to the weight ratio of the fly ash to the water-reducing agent, a fourth equation relating to the weight ratio of the fly ash to the water, and a fifth equation relating to the weight ratio of the solid matter to the water. The aforementioned weight conditions are conditions based on the aforementioned parameter set. A method for producing the geopolymer composition according to claim 1.

3. The step of setting the aforementioned parameter set is: The process includes the steps of setting a first parameter set which is the first equation and the second equation, and setting a second parameter set which is the third equation, the fourth equation, and the fifth equation, A method for producing the geopolymer composition according to claim 2.

4. The aforementioned aqueous solution of alkaline activator contains sodium hydroxide and silicon dioxide. The step of calculating the aforementioned mixing ratio includes a step of determining whether the molar ratio of sodium hydroxide to silicon dioxide and the molar ratio of water to sodium hydroxide satisfy predetermined requirements. If, in the determination step, it is determined that the predetermined requirements are not met, the concentration of the alkaline activator aqueous solution is changed, and then the step of calculating the blending ratio is performed again. A method for producing the geopolymer composition according to claim 3.

5. In the determination step, if it is determined that the predetermined requirements are met, the step includes verifying whether the flow value is greater than or equal to a predetermined value, In the verification step, if it is determined that the flow value is less than the predetermined value, water is added and the step of setting the second parameter set is repeated. A method for producing the geopolymer composition according to claim 4.

6. In the step of calculating the aforementioned mixing ratio, the mixing ratio is calculated by solving the determinant representing the volume condition based on the determinant representing the weight condition and the determinant representing the density conditions for the water, the fine aggregate, the fly ash, the alkaline activator aqueous solution, and the water-reducing agent. A method for producing a geopolymer composition according to any one of claims 1 to 5.

7. The geopolymer composition does not contain any active fillers other than the fly ash. A method for producing a geopolymer composition according to any one of claims 1 to 6.

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