Cured body, roadbed material, and method for producing cured body

Abstract

The present invention addresses the problem of providing a cured body and a method for producing a cured body, in which a cured body to which CO2 is immobilized can be produced without performing a degassing step or a carbonation step in a gas-tight container. [Solution] A cured body comprising: a binder; at least one of carbonated steel slag, wood material, synthetic resin, and natural fiber; and water. The content of at least one of the carbonated steel slag, the wood material, the synthetic resin, and the natural fiber is from 1% by mass to 90% by mass (inclusive).

Description

Technical Field

[0001] The present invention relates to a solidified body, a roadbed material and a method for manufacturing the solidified body. Background Art

[0002] Various decarbonization technologies are being researched toward carbon neutrality. Among them, carbonate-concrete technologies based on CO2 utilization are easier to implement than other CO2 utilization technologies and have a high potential for CO2 sequestration. Patent Document 1 discloses a method for producing a carbonated concrete from steelmaking slag using steelmaking slag and CO2 as raw materials.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 5263190 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] Among the patent documentation 1, degassed in the airtight container, then, implement for a long time to supply with carbon dioxide and make the carbonating process of the uncarbonated Ca raw material generation carbonating reaction of preform, there is the very large problem of load.In addition, also exist and be difficult to make until whole carbonating problems of solidified body inside.The present invention is to finish in view of such problem, even its purpose is to provide and do not carry out degassing process, carbonating process in the airtight container and also can fix CO solidified body, comprise the roadbed material of this solidified body and the manufacture method of solidified body.

[0008] Means for solving problems

[0009] Means for solving the above-mentioned problems are as follows.

[0010] [1] A solidified body comprising: a binder; at least one of carbonated steelmaking slag, wood material, synthetic resin, and natural fiber; and water, wherein the content of at least one of carbonated steelmaking slag, wood material, synthetic resin, and natural fiber is not less than 1% by mass and not more than 90% by mass.

[0011] [2] The solidified body as described in [1], wherein the carbonated steelmaking slag is a carbonated steelmaking slag fine powder having a particle size of 1 mm or less, and the content of carbonate contained in the carbonated steelmaking slag fine powder is 1% by mass or more.

[0012] [3] The solidified body according to [1] or [2], wherein the wood material is at least one of wood powder, wood chips, wood fibers, wood pulp, semi-carbonized materials, carbonized materials, cellulose nanofibers, carbon nanofibers, and carbon fibers.

[0013] [4] The solidified body according to [1] or [2], wherein the wood material contains at least one of a semi-carbonized material and a carbide, and the content of the at least one of the semi-carbonized material and the carbide contained in the wood material is 1% by mass or more.

[0014] [5] The solidified body according to any one of [1] to [4], wherein the binder is at least one of blast furnace slag fine powder, steelmaking slag fine powder, glassy aluminosilicate, slaked lime, cement, and waste concrete.

[0015] [6] The solidified body according to [5], wherein the steelmaking slag fine powder is at least one of converter slag, secondary refining slag, molten iron pretreatment slag and electric furnace slag.

[0016] [7] The solidified body according to [5], wherein the glassy aluminosilicate is at least one of fly ash, volcanic ash, and silica fume.

[0017] [8] The solidified body according to any one of [1] to [7], wherein the water is at least one of fresh water, salt water, sea water, hot spring water, and a sodium hydroxide aqueous solution.

[0018] [9] A roadbed material, wherein the content of the solidified body described in [1] is 1% by mass or more.

[0019]

[10] A method for manufacturing a solidified body, comprising: a kneading step of kneading the following components to form a mixture, the components being: a binder; at least one of carbonated steelmaking slag, wood material, synthetic resin and natural fiber; and water; and a curing step of shaping the aforementioned mixture and curing it, wherein in the aforementioned kneading step, the mixture is mixed and kneaded in such a manner that the content of at least one of the aforementioned carbonated steelmaking slag, wood material, synthetic resin and natural fiber becomes not less than 1% by mass and not more than 90% by mass.

[0020]

[11] The method for producing a cured product according to

[10] , wherein, in the kneading step, the water and the binder are mixed and kneaded so that the mass ratio thereof becomes 0.1 to 0.7.

[0021] According to the present invention, a solidified body is produced by solidifying a binder and a raw material having carbon fixation capability using a hydrate. Therefore, the solidified body according to the present invention is a solidified body capable of fixing CO2 without the need for a degassing process or a carbonation process in an airtight container. By using such a solidified body, a solidified body that fixes a large amount of CO2 can be easily produced, thereby contributing to the achievement of carbon neutrality. DETAILED DESCRIPTION

[0022] [Implementation Method 1]

[0023] The present invention is described below using embodiments thereof. In the solidified body of this embodiment, a portion of the binder is replaced with a CO₂-containing substance, which is then mixed with water to produce a solidified body. This results in a solidified body in which CO₂ is immobilized. As Embodiment 1, a solidified body comprising a binder, carbonating steelmaking slag, and water will be described.

[0024] The manufacturing method of the solidified body involved in embodiment 1 is described. First, a binder, carbonated steelmaking slag and water, which are the raw materials of the solidified body, are kneaded to form a mixture. This process is a kneading step. Next, the mixture formed by kneading the binder, carbonated steelmaking slag and water is formed into a specified shape, cured in air, a humid atmosphere or water for more than 1 day, and solidified by a hydration reaction. This process is a curing step. By solidifying the raw materials by a hydration reaction in this way, a solidified body with CO2 fixed therein can be manufactured. The manufactured solidified body is used, for example, as a sea revetment material, foundation reinforcement material, fishing reef, wall material, compacted sand pile material, calcium oxide modified material, roadbed material, aggregate.

[0025] A binder is a material that binds and solidifies particles through a hydration reaction. Examples of the binder include at least one of blast furnace slag fine powder, steelmaking slag fine powder, glassy aluminosilicate, slaked lime, cement, and waste concrete. The particle size of the blast furnace slag fine powder and steelmaking slag fine powder may be 1 mm or less. A particle size of 1 mm or less refers to a particle size that can be sieved through a sieve with a mesh opening of 1 mm.

[0026] The binder is mixed so that the binder content in the solidified product is between 10% and 99% by mass. The fine powder of steelmaking slag used as the binder may be, for example, at least one of converter slag, secondary refining slag, hot metal pretreatment slag, and electric furnace slag. The glassy aluminosilicate used as the binder may be, for example, at least one of fly ash, volcanic ash, and silica fume. Table 1 below shows an example of these component compositions.

[0027] [Table 1]

[0028] CaO <![CDATA[SiO2]]> <![CDATA[Al2O3]]> MgO MnO T-Fe <![CDATA[P2O5]]> converter slag 47.9 12.1 4.2 5.7 2.7 18.6 2.5 Secondary refining slag 42.5 13.4 21.8 5.1 6.3 5.2 1.8 Liquid iron pretreatment slag 26.0 24.2 3.1 1.3 3.6 29.2 2.7 fly ash 3.7 58.4 23.2 0.8 0.0 4.1 0.0 volcanic ash 1.1 75.0 12.1 0.2 0.0 1.0 0.0 silica fume 0.0 96.5 0.3 0.0 0.0 0.2 0.0

[0029] Unit: mass%

[0030] Water is, for example, at least one of fresh water, salt water, sea water, hot spring water and aqueous sodium hydroxide solution. As long as it contains moisture, but by using salt water, sea water comprising chloride ions or hot spring water comprising sulfate ions, thiosulfate ions, chloride ions or aqueous sodium hydroxide solution comprising sodium ions of high pH, ​​thereby promoting the strength of the mixture obtained by mixing to improve, the strength of the solidified body is improved. By using hot spring water comprising carbonate ions, the CO2 fixed amount of the solidified body increases. An example of the composition contained in these waters is shown in Table 2 below.

[0031] [Table 2]

[0032] <![CDATA[Na + ]]> <![CDATA[K + ]]> <![CDATA[Mg 2+ ]]> <![CDATA[Ca 2+ ]]> <![CDATA[Cl - ]]> <![CDATA[SO4 2- ]]> <![CDATA[HCO3 - ]]> freshwater 0.0 0.00 0.0 0.0 0.0 0.0 0.0 brine 3934.0 0.00 0.0 0.0 6066.0 0.0 0.0 seawater 10556.0 380.00 1272.0 400.0 18980.0 2649.0 140.0 hot spring water 95.5 3.42 0.2 278.0 113.0 699.0 15.3 Hot spring water containing carbonate ions 55.4 6.00 41.7 245.2 6.9 0.7 1135.0

[0033] Unit: mg / kg

[0034] The water-binder ratio, which represents the mass ratio of water to the binder during kneading (water mass / binder mass), is preferably 0.1 or more and 0.7 or less. If the water-binder ratio during kneading is less than 0.1, the fluidity of the mixture obtained in the kneading step decreases, which is not preferred. On the other hand, if the water-binder ratio during kneading is greater than 0.7, the time required to increase the strength of the solidified body in the curing step increases, which reduces the strength of the solidified body, which is not preferred.

[0035] Carbonated steelmaking slag is mixed in such a way that the content of the carbonated steelmaking slag in the solidified body becomes more than 1% by mass and less than 90% by mass. If the content of the carbonated steelmaking slag is less than 1% by mass, the CO2 fixed amount of the solidified body is reduced, which is not ideal. On the other hand, if the content of the carbonated steelmaking slag is more than 90% by mass, the amount of the binder is reduced and the strength of the solidified body is reduced, which is not ideal. Carbonated steelmaking slag can be manufactured by the following method: on the basis of adding steam to the steelmaking slag, a gas containing CO2 is imported and a carbonation treatment is carried out for 1 day. Carbonated steelmaking slag can also be manufactured by keeping the steelmaking slag in water instead of adding steam to the steelmaking slag, and by importing a gas containing CO2 into the water and a carbonation treatment is carried out for 1 day. The CO2 concentration of the imported gas containing CO2 can be more than 10 volume %. The gas containing CO2 can use exhaust gas with a CO2 concentration of more than 10 volume % discharged from the manufacturing process equipment in the steelworks.

[0036] The steelmaking slag used for the carbonation of steelmaking slag preferably uses steelmaking slag fine powder with a particle size of less than 1 mm. A particle size of less than 1 mm refers to a particle size that can be sieved through a sieve with a mesh opening of 1 mm. By using steelmaking slag fine powder with a particle size of less than 1 mm, a reaction promoting effect brought about by the increase in the reaction interface area during the carbonation treatment is obtained, and the CO2 fixed amount of the carbonation steelmaking slag is increased. By using carbonation steelmaking slag fine powder with a particle size of less than 1 mm, the specific surface area is increased in the solidification step, the alkali supply is promoted, and the strength of the solidified body is improved.

[0037] Comprise carbonate in the carbonation steelmaking slag through carbonation treatment. Carbonate for example can be any one of calcium carbonate, calcium carbonate hydrate, magnesium carbonate, magnesium carbonate hydrate. Preferably, the content of the carbonate comprised in the carbonation steelmaking slag becomes the mode of more than 1 quality % and carries out the carbonation treatment of steelmaking slag. Owing to comprising CO in the carbonate slag , therefore when comprising more carbonate, the CO of corresponding amount is fixed to solidified body. Therefore, by being the raw material that the carbonation steelmaking slag more than 1 quality % is used for solidified body, thereby the CO of solidified body fixed amount increases. The more the content of the carbonate comprised in the carbonation steelmaking slag is, the more the CO that is fixed to solidified body increases, therefore can not stipulate the upper limit of the content of carbonate.

[0038] By replacing a part of the binder of the solidified body with carbonation steelmaking slag like this, a solidified body fixed with CO2 can be manufactured. The solidified body involved in embodiment 1 can utilize hydrate to solidify the binder and carbonation steelmaking slag to manufacture, so this solidified body becomes a solidified body that can be manufactured even if a degassing process and a carbonation process are not carried out in an airtight container. In addition, in calcium carbonate and biochar as CO2 fixing materials, components other than Ca and ash components will be produced. In contrast, in the solidified body manufactured using carbonation steelmaking slag, the generation of such residues can also be suppressed.

[0039] [Implementation Method 2]

[0040] Next, a cured product including a binder, a wood material, and water will be described as Embodiment 2. The binder and water are the same as those in Embodiment 1, and therefore their description will be omitted.

[0041] The manufacturing method of the solidified body that embodiment 2 relates to is described. First, the binder as the raw material of the solidified body, the wood material that is crushed to 4.75mm or less and water are kneaded to form a mixture. This operation is a kneading step. The wood material that is less than 4.75mm refers to the wood material that can be sieved under the sieve through a sieve with a mesh opening of 4.75mm in the crushed wood material. Next, the mixture that is kneaded with the binder, wood material and water is formed into a specified shape, cured for more than 1 day in air, a humid atmosphere or water, and solidified by hydration reaction. This operation is a curing step. By utilizing hydration reaction to solidify the raw materials like this, a solidified body fixed with CO2 can be manufactured.

[0042] The wood material is mixed so that the content of the wood material in the solidified body is not less than 1% by mass and not more than 90% by mass. The wood material is, for example, one of wood powder, wood chips, wood fibers, pulp, semi-carbonized material, carbide, cellulose nanofibers, carbon nanofibers, and carbon fibers. By using the wood material as the raw material of the solidified body, CO2 can be fixed to the solidified body. By changing the ratio of the wood material in the raw material, the specific gravity of the manufactured solidified body can be adjusted. Solidified bodies with high specific gravity are used as artificial stones set in the sea. By using solidified bodies with high specific gravity as artificial stones, artificial stones with excellent wave stability are obtained. Solidified bodies with low specific gravity are used as revetment materials, outer wall materials, and floating fishing reefs. By using solidified bodies with low specific gravity, construction becomes easier, and thus the construction period of revetment projects and outer wall projects can be shortened.

[0043] Wood materials have high water absorption. Therefore, by using wood materials as the raw material for the solidified body, heat generation during the hydration reaction during the curing step is suppressed, which can prevent cracking in the produced solidified body. Furthermore, by using wood materials as the raw material for the solidified body, drying shrinkage of the solidified body is also suppressed, thereby producing a solidified body with excellent thermal insulation, sound insulation, and fire resistance, as well as excellent humidity control and biocompatibility.

[0044] The wood material preferably contains at least one of a semi-carbonized material and a carbonized material. The semi-carbonized material and the carbonized material function as an adsorbent, thereby adsorbing the lye contained in the low-cost wood material that causes the solidification of the solidified body to be delayed. Therefore, by using a wood material containing a semi-carbonized material and a carbonized material, a solidified body can be produced using a low-cost wood material. The semi-carbonized material can be produced by heating the wood material at a temperature of 200°C or higher and lower than 300°C in an oxygen-free or low-oxygen reducing atmosphere. The carbonized material can be produced by heating the wood material at a temperature of 300°C or higher and lower than 1000°C in an oxygen-free or low-oxygen reducing atmosphere.

[0045] The content of at least one of the semi-carbonized compounds and carbides in the wood material is preferably 1% by mass or greater. If the content of at least one of the semi-carbonized compounds and carbides is less than 1% by mass, the effect of suppressing solidification delay cannot be achieved, making it impossible to use low-cost wood materials. On the other hand, the greater the content of the semi-carbonized compounds and carbides, the greater the effect of suppressing solidification delay. Therefore, there is no upper limit for the content of the semi-carbonized compounds and carbides.

[0046] In this way, even if wood materials are used instead of carbonation steelmaking slag, a solidified body in which CO2 is fixed can be produced. The solidified body according to the second embodiment can also be produced by solidifying the binder and wood materials using hydrates, and thus can be produced even without performing the degassing process and the carbonation process in an airtight container.

[0047] [Implementation Method 3]

[0048] A cured product including a binder, a synthetic resin, and water will be described as Embodiment 3. Since the binder and water are the same as those in Embodiment 1, their description will be omitted.

[0049] The binder, synthetic resin crushed to a size of 4.75 mm or less, and water, which are the raw materials of the solidified body, are kneaded to form a mixture. This process is a kneading step. The synthetic resin of 4.75 mm or less refers to the synthetic resin that is sieved through a sieve with a mesh opening of 4.75 mm in the crushed synthetic resin and is sieved below the sieve. Next, the mixture formed by kneading the binder, synthetic resin, and water is molded into a specified shape, cured in air, a humid atmosphere, or water for more than one day, and solidified by a hydration reaction. This process is a curing step. By solidifying the raw materials by a hydration reaction in this way, the solidified body involved in embodiment 3 can be manufactured.

[0050] The synthetic resin is mixed so that the content of the synthetic resin in the solidified body is between 1% and 90% by mass. The synthetic resin may be, for example, one of synthetic rubber scraps, waste tires, expanded polystyrene scraps, polyvinyl chloride scraps, polyethylene scraps, polystyrene scraps, and synthetic fiber scraps, which are solid synthetic polymer compounds. Preferred synthetic resins include waste plastics such as expanded polystyrene scraps, polyvinyl chloride scraps, polyethylene scraps, polystyrene scraps, and synthetic fiber scraps. Using the synthetic resin as the raw material for the solidified body improves the thermal insulation properties of the solidified body. Furthermore, a lightweight solidified body or a solidified body with elasticity can be produced.

[0051] In this way, even if a synthetic resin is used instead of carbonation steelmaking slag, a solidified body in which CO2 is fixed can be produced. The solidified body involved in the third embodiment can also be produced by solidifying the binder and the synthetic resin using a hydrate, and thus can be produced even without performing the degassing process and the carbonation process in an airtight container.

[0052] [Implementation Method 4]

[0053] A solidified body including a binder, natural fibers, and water will be described as Embodiment 4. Since the binder and water are the same as those in Embodiment 1, their description will be omitted.

[0054] The binder as the raw material of the solidified body, the natural fiber cut into 4.75mm or less and water are kneaded to form a mixture. This operation is a kneading step. Next, the mixture formed by kneading the binder, the natural fiber and the water is molded into a prescribed shape, maintained in air, a moist atmosphere or water for more than 1 day, and solidified by hydration reaction. This operation is a curing step. By utilizing hydration reaction to solidify the raw material like this, the solidified body that embodiment 4 relates to can be manufactured.

[0055] Natural fibers are mixed so that the content of natural fibers in the solidified body is between 1% and 90% by mass. Examples of natural fibers include plant fibers such as cotton, hemp, flax, rice husks, palm shells, and banana peels, or animal fibers such as wool, cashmere, and silk. Using natural fibers as the raw material for the solidified body improves the strength of the solidified body. Furthermore, a lightweight solidified body or a solidified body with elasticity can be produced.

[0056] In this way, even if natural fibers are used instead of carbonating steelmaking slag, a solidified body in which CO2 is fixed can be produced. The solidified body according to the fourth embodiment can also be produced by solidifying the binder and natural fibers using hydrates, and thus can be produced even without performing the degassing and carbonation steps in an airtight container.

[0057] In embodiments 1 to 4, examples of solidified bodies including a binder, carbonated steelmaking slag, a wood material, a synthetic resin, or a natural fiber, and water are used for description, but the invention is not limited thereto. The solidified body can be manufactured using carbonated steelmaking slag and a wood material, or using carbonated steelmaking slag and a synthetic resin, or using carbonated steelmaking slag and a natural fiber. In addition, the solidified body can be manufactured using a wood material and a synthetic resin, or using a wood material and a natural fiber, or using a synthetic resin and a natural fiber. That is, the solidified body involved in this embodiment is a solidified body including a binder, at least one of carbonated steelmaking slag, a wood material, a synthetic resin, and a natural fiber, and water, and the content of at least one of carbonated steelmaking slag, a wood material, a synthetic resin, and a natural fiber is not less than 1% by mass and not more than 90% by mass.

[0058] Alternatively, a solidified body containing a binder, carbonated steelmaking slag, wood material, synthetic resin, or natural fiber, water, and fine aggregate may be used. Alternatively, a solidified body containing a binder, carbonated steelmaking slag, wood material, synthetic resin, or natural fiber, water, fine aggregate, and coarse aggregate may be used. Even with such a solidified body, a solidified body containing fixed CO2 can be produced without performing the degassing and carbonation steps in an airtight container.

[0059] The roadbed material containing 1% or more of the solidified substance obtained in this embodiment has CO2 fixed in the roadbed material. In addition to the solidified substance obtained in this embodiment, the roadbed material may further contain at least one of carbonated steelmaking slag, wood material, synthetic resin, and natural fiber. When the solidified substance is incorporated into the roadbed material, the solidified substance is pulverized to meet CS-40 as specified in JIS A 5015:2018, "Steel Slag for Road Use."

[0060] Example

[0061] Next, an example of manufacturing a solidified body by adjusting the mixing ratio of a binder, carbonated steelmaking slag (containing calcium carbonate as carbonate), a wood material, a synthetic resin, a natural fiber, and water is described. Carbonated steelmaking slag fine powder with a particle size of 1 mm or less is used as the carbonated steelmaking slag. The wood material and the synthetic resin are crushed to a size of 4.75 mm or less using a crusher, and the natural fiber is cut to a size of 4.75 mm or less using a shredder. The mixing ratio of these raw materials, the water-binder ratio, the presence or absence of solidification, and the CO2 fixation amount are shown in Table 3 below. The materials of the binder, carbonated steelmaking slag fine powder, the wood material, the synthetic resin, and the natural fiber used in each of Invention Examples 1 to 17 and Comparative Examples 1 to 4 are shown in Table 4 below.

[0062] In a test room where the raw materials of each solidified body shown in Table 3 were maintained at a temperature of 20±3°C and a relative humidity of 60% or more, 15 L of the raw materials were placed in a 20 L mortar mixer. First, dry mixing was performed for 30 seconds, and then water was added and mixed at 100 rpm for 90 seconds. Then, the raw materials were filled into a cylindrical container. Sealing and curing are carried out until the material age is 7 days, thereby producing a solidified body.

[0063] The semi-carbonized material contained in the wood material was produced by treating wood powder having an average particle size of 1 mm with superheated steam at 250°C for 10 minutes. The carbonized material contained in the wood material was produced by treating wood powder having an average particle size of 300 μm with superheated steam at 300°C for 20 minutes. The average particle size of the wood powder is the volume average diameter defined by the following formula (1).

[0064] [Mathematical formula 1]

[0065]

[0066] In the above formula (1), x i is the representative particle size of the particle size range (mm), n i is the number of particles.

[0067] If the compressive strength of the cured product was 1 MPa or higher, the product was evaluated as "0"; if the compressive strength of the cured product was less than 1 MPa, the product was evaluated as "X." The compressive strength of the cured product was measured in accordance with JIS A 1108:2018, "Test methods for compressive strength of concrete."

[0068] [Table 3]

[0069]

[0070] [Table 4]

[0071]

[0072] As shown in Table 3, in Inventive Examples 1 to 17, the mixed raw materials after kneading undergo hydration and solidification, and a solidified body with CO2 fixed therein can be produced. This result confirms that, with respect to the solidified body involved in this embodiment, a solidified body with CO2 fixed therein can be produced even if the degassing process and the carbonation process are not carried out in an airtight container. On the other hand, in Comparative Examples 1 and 2, although hydration and solidification occur to produce solidified bodies, since the raw materials of the solidified bodies do not contain carbonated steelmaking slag fine powder, wood material and synthetic resin, the CO2 fixed amount of the solidified bodies is 0, and a solidified body with CO2 fixed therein cannot be produced. In Comparative Examples 3 and 4, since the raw materials do not contain a binder, the raw materials do not undergo hydration and solidification, and a solidified body cannot be produced.

Claims

1. A solidified body comprising: Adhesive; At least one of carbonated steelmaking slag, wood materials, synthetic resins and natural fibers; and water, The content of at least one of the carbonated steelmaking slag, wood material, synthetic resin and natural fiber is 1% by mass or more and 90% by mass or less.

2. The cured product according to claim 1, wherein The carbonated steelmaking slag is a carbonated steelmaking slag fine powder with a particle size of less than 1 mm. The content of carbonate contained in the carbonated steelmaking slag fine powder is 1% by mass or more.

3. The cured product according to claim 1 or 2, wherein The wood material is at least one of wood powder, wood chips, wood fibers, wood pulp, semi-carbonized materials, carbonized materials, cellulose nanofibers, carbon nanofibers, and carbon fibers.

4. The cured product according to claim 1 or 2, wherein The wood material comprises at least one of a semi-carbonized material and a carbonized material. The content of at least one of the semi-carbonized material and the carbonized material in the wood material is 1% by mass or more.

5. The cured product according to any one of claims 1 to 4, wherein The binder is at least one of blast furnace slag fine powder, steelmaking slag fine powder, glassy aluminosilicate, slaked lime, cement and waste concrete.

6. The cured product according to claim 5, wherein The steelmaking slag fine powder is at least one of converter slag, secondary refining slag, molten iron pretreatment slag and electric furnace slag.

7. The cured product according to claim 5, wherein The glassy aluminosilicate is at least one of fly ash, volcanic ash, and silica fume.

8. The cured product according to any one of claims 1 to 7, wherein The water is at least one of fresh water, salt water, sea water, hot spring water and sodium hydroxide aqueous solution.

9. Roadbed materials, including: The content of the cured product according to claim 1 is 1% by mass or more.

10. A method for producing a solidified body, comprising: a kneading step of kneading the following ingredients to form a mixture, the ingredients being: a binder; at least one of carbonated steelmaking slag, a wood material, a synthetic resin, and a natural fiber; and water; and a curing step of shaping the mixture and curing it, In the kneading step, the carbonated steelmaking slag, the wood material, the synthetic resin, and the natural fiber are mixed and kneaded so that the content of at least one of them is 1% by mass or more and 90% by mass or less.

11. The method for producing a cured product according to claim 10, wherein: In the kneading step, the water and the binder are mixed and kneaded so that the mass ratio thereof becomes 0.1 to 0.7.

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