Mortar composition for seaweed bed creation, blocks for seaweed bed creation, and method for producing the mortar composition for seaweed bed creation.

Abstract

The present invention provides a mortar composition for seaweed bed creation that can significantly reduce the carbon dioxide emission intensity per unit of seaweed bed creation blocks. [Solution] A mortar composition for creating seaweed beds comprising a binder, fine aggregate, and an alkaline stimulant, wherein the binder comprises blast furnace slag fine powder, the fine aggregate comprises main ash of biomass combustion ash, and the alkaline stimulant comprises fly ash of biomass combustion ash.

Description

Technical Field

[0001] The present invention relates to a mortar composition for seaweed bed construction, a block for seaweed bed construction, and a method for producing a mortar composition for seaweed bed construction.

Background Art

[0002] Natural stones, gravel materials, blocks, etc. are used as growth base materials for rocky seaweed beds. Among these, cement is used as a binder in blocks for seaweed bed construction (for example, Patent Document 1).

[0003] In addition, since cement consumes a large amount of energy during production (firing), blocks for seaweed bed construction using cement have a large carbon dioxide emission intensity (the amount of carbon dioxide (CO2) emissions per unit defined for each raw material and energy). Therefore, attempts have been made to use blast furnace slag fine powder, which is an industrial by-product, in blocks for seaweed bed construction (for example, Patent Document 2).

[0004] In general, not only cement used as a binder but also natural sand as fine aggregate and slaked lime as an alkali activator are used. However, since energy is required for the mining of natural sand and the production of slaked lime, carbon dioxide emissions are associated with each.

Prior Art Documents

Patent Documents

[0005] [[ID=3O]]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In blocks for seaweed bed construction using only blast furnace slag fine powder, the carbon dioxide emission intensity cannot be sufficiently reduced.

[0007] The object of the present invention is to provide a mortar composition for creating seaweed beds that can sufficiently reduce the carbon dioxide emission intensity per unit of seaweed bed creation blocks. [Means for solving the problem]

[0008] One aspect of the present invention is a mortar composition for creating seaweed beds comprising a binder, fine aggregate, and an alkaline stimulant, wherein the binder comprises blast furnace slag fine powder, the fine aggregate comprises main ash of biomass combustion ash, and the alkaline stimulant comprises fly ash of biomass combustion ash. [Effects of the Invention]

[0009] According to one aspect of the present invention, it is possible to provide a mortar composition for creating seaweed beds that can sufficiently reduce the carbon dioxide emission intensity per unit of seaweed bed creation blocks. [Brief explanation of the drawing]

[0010] [Figure 1] This graph shows the particle size volume curves of various biomass bottom ash materials used as fine aggregate. [Figure 2] This graph shows the relationship between the proportion of blast furnace slag powder used as a binder and the compressive strength. [Figure 3] This graph shows the compressive strength of mortar compositions used for creating seaweed beds. [Figure 4] This graph shows the compressive strength of mortar compositions used for creating seaweed beds. [Figure 5] This graph shows the relationship between the mass ratio of the binder and the uniaxial compressive strength. [Modes for carrying out the invention]

[0011] The embodiments of the present invention will be described in detail below.

[0012] <Mortar composition for creating seaweed beds> The mortar composition for seaweed bed creation disclosed herein comprises a binder, fine aggregate, and an alkaline stimulant. In this specification, the mortar composition for seaweed bed creation is a mortar composition used for creating seaweed beds. A seaweed bed refers to an area in shallow coastal waters where seaweed and seagrass grow abundantly. The mortar composition for seaweed bed creation can be mixed with water and hardened to form a block for seaweed bed creation. The block for seaweed bed creation is a block used for creating seaweed beds.

[0013] <<Binding material>> The binder contains blast furnace slag fine powder. The binder is a material that reacts with water and contributes to the hardening of the mortar. The binder is also called a solidifying agent. Blast furnace slag fine powder is obtained by rapidly cooling molten blast furnace slag, a by-product of the ironmaking process using a blast furnace, with water, drying, and grinding it. The average particle size of the blast furnace slag fine powder is approximately 1.0 to 10 μm. In this specification, the average particle size refers to the particle size at a cumulative volume fraction of 50%.

[0014] The amount of blast furnace slag fine powder used as a binder is not particularly limited, but is, for example, 10% by mass or more and 45% by mass or less, preferably 15% by mass or more and 40% by mass or less, and more preferably 20% by mass or more and 35% by mass or less.

[0015] The binder may further include at least one selected from the group consisting of waste glass powder, waste ceramic powder, and bone ash. Since waste glass powder, waste ceramic powder, and bone ash all contain calcium, which contributes to the solidification of the mortar, they can function as binder additives.

[0016] Waste glass powder is a fine powder generated when waste glass, such as bottles collected from recycling plants at waste treatment facilities, broken bottles, plate glass, and other glass materials that are treated as waste, is crushed into granular form (cullet) and recycled into recycled materials, and is then disposed of in final disposal sites.

[0017] Waste ceramic powder is a fine powder generated when waste ceramics, which are treated as waste, are crushed into granular (cullet-like) particles and recycled into materials, and is then disposed of in final disposal sites.

[0018] Bone ash is powdery ash obtained by burning animal bones from which glue and lipids have been removed. Bone ash contains calcium hydrogen phosphate as the main component.

[0019] The blending amount of such an adjuvant for the binder is not particularly limited, and in the mortar composition, for example, it is 0% by mass or more and 15% by mass or less, preferably 0% by mass or more and 12% by mass or less, and more preferably 0% by mass or more and 10% by mass or less.

[0020] <<Fine aggregate>> The fine aggregate contains the main ash of biomass combustion ash. The fine aggregate refers to an aggregate in which 85% or more of the whole contains particles with an average particle size of 5 mm or less.

[0021] Biomass combustion ash is combustion ash discharged as a by-product from a woody biomass power plant. For example, woody biomass is combustion ash recovered when burned in a circulating fluidized bed boiler using a single fuel of PKS (Palm Kernel Shell) or a mixed fuel of PKS and wood chips as the fuel type.

[0022] The main ash is also called bottom ash and is ash recovered from the bottom of an incinerator or the like. The main ash of biomass combustion ash (hereinafter sometimes referred to as biomass main ash) is mainly composed of silica sand (SiO2), which is a fluid medium of a circulating fluidized bed boiler.

[0023] Fig. 1 shows the particle size accumulation curves of various biomass main ashes (bottom ashes) used as fine aggregates. The particle size accumulation curve is represented by a graph showing the relationship between the particle size of the biomass main ash and the passing mass percentage (%). The passing mass percentage indicates the ratio of the mass passing through each sieve in the whole sample to the mass of the whole sample. From Fig. 1, the average particle size of the biomass main ash is about 0.1 to 0.9 mm.

[0024] The amount of biomass bottom ash used as fine aggregate is not particularly limited, but is, for example, 30% by mass or more and 70% by mass or less, preferably 35% by mass or more and 65% by mass or less, and more preferably 40% by mass or more and 60% by mass or less.

[0025] The fine aggregate may further contain waste iron powder and / or bone phosphorus. The waste iron powder and bone phosphorus can function as fertilizer components for seaweed beds.

[0026] Waste iron powder is the powdered iron collected during the processing of iron products.

[0027] Bone phosphate is a product mainly consisting of calcium hydrogen phosphate dihydrate, which is a by-product of the gelatin manufacturing process.

[0028] The amount of such fertilizer components is not particularly limited, and for example, it is 0% to 20% by mass, preferably 0% to 15% by mass, and more preferably 0% to 10% by mass, as an amount that replaces a portion of the biomass bottom ash in the fine aggregate.

[0029] <<Alkaline stimulant>> The alkaline stimulant contains fly ash from biomass combustion (hereinafter sometimes referred to as biomass fly ash). The alkaline stimulant is an alkaline reaction accelerator that promotes the hardening reaction of the binder. Biomass fly ash exhibits strong alkalinity with a pH of approximately 13.

[0030] The amount of biomass fly ash used as an alkaline stimulant in the blast furnace slag fine powder used as a binder is not particularly limited, and is, for example, 1% by mass or more and 7% by mass or less, preferably 2% by mass or more and 6% by mass or less, and more preferably 3% by mass or more and 5% by mass or less.

[0031] As described above, the mortar composition for seaweed bed creation of this disclosure contains blast furnace slag fine powder as a binder, main ash of biomass combustion ash as fine aggregate, and fly ash of biomass combustion ash as an alkaline stimulant, making it possible to construct the mortar composition for seaweed bed creation using only industrial by-products without using cement. Therefore, the mortar composition for seaweed bed creation of this disclosure can significantly reduce the carbon dioxide emission intensity per unit.

[0032] Furthermore, in the mortar composition for seaweed bed creation disclosed herein, the main ash of biomass combustion ash is used as fine aggregate, and the fly ash of biomass combustion ash is used as an alkaline stimulant, thereby enabling the utilization of biomass combustion ash, which would otherwise be discarded, regardless of the type of ash.

[0033] Furthermore, as described above, the mortar composition for seaweed bed creation of this disclosure, by further including waste iron powder and / or bone phosphorus in the fine aggregate, can impart fertilizing components for seaweed beds to the mortar composition for seaweed bed creation while being composed solely of industrial by-products.

[0034] As described above, the mortar composition for seaweed bed creation of this disclosure further includes at least one binder selected from the group consisting of waste glass powder, waste ceramic powder, and bone ash, thereby accelerating the solidification reaction of the mortar while the mortar composition for seaweed bed creation is composed solely of industrial by-products. Therefore, the mortar composition for seaweed bed creation of this disclosure can reduce the amount of binder used as much as possible.

[0035] <Blocks for creating seaweed beds> The seaweed bed creation block of this disclosure comprises the above-mentioned seaweed bed creation mortar composition and mixing water. Specifically, the seaweed bed creation block of this disclosure comprises a binder containing blast furnace slag fine powder, a fine aggregate containing main ash of biomass combustion ash, and an alkaline stimulant containing fly ash of biomass combustion ash, to which mixing water is added.

[0036] The mixing water can be either tap water or seawater, but tap water is preferred.

[0037] The amount of kneading water is not particularly limited, but for example, it is 30% by mass or more and 70% by mass or less relative to the binder, preferably 35% by mass or more and 65% by mass or less, and more preferably 40% by mass or more and 60% by mass or less.

[0038] Furthermore, in the seaweed bed creation block of this disclosure, the mortar composition for creating seaweed beds to which mixed water is added may contain at least one selected from the group consisting of waste glass powder, waste ceramic powder, and bone ash as a binder.

[0039] Furthermore, in the seaweed bed creation block of this disclosure, the mortar composition for creating seaweed beds to which mixed water is added may contain waste iron powder and / or bone phosphorus as fine aggregate.

[0040] The seaweed bed creation block of this disclosure obtains the effects of the seaweed bed creation mortar composition by including the above-mentioned seaweed bed creation mortar composition and mixing water. In other words, since the seaweed bed creation block of this disclosure uses a seaweed bed creation mortar composition composed solely of industrial by-products, the carbon dioxide emission intensity can be sufficiently reduced.

[0041] Furthermore, in the seaweed bed creation blocks of this disclosure, the main ash of biomass combustion ash is used as fine aggregate and the fly ash of biomass combustion ash is used as an alkaline stimulant in the mortar composition for creating seaweed beds that is included, so that woody biomass combustion ash, which would otherwise be discarded, can be utilized regardless of the type of ash.

[0042] Furthermore, in the seaweed bed creation blocks of this disclosure, the seaweed bed creation mortar composition used contains waste iron powder and / or bone phosphorus in the fine aggregate, thereby enabling the seaweed bed creation blocks to be imparted with seaweed bed fertilizer components while the seaweed bed creation mortar composition is composed solely of industrial by-products.

[0043] Furthermore, in the seaweed bed creation block of this disclosure, the mortar composition used for creating the seaweed bed contains at least one selected from the group consisting of waste glass powder, waste ceramic powder, and bone ash as a binder, thereby accelerating the solidification reaction of the mortar while the seaweed bed creation block is composed solely of industrial by-products. Therefore, the amount of binder used in the seaweed bed creation block of this disclosure can be reduced as much as possible.

[0044] <Method for producing mortar composition for seaweed bed creation> The method for producing the mortar composition for seaweed bed creation described herein is a method for producing the mortar composition for seaweed bed creation described above. Specifically, it comprises a step of blending a binder, fine aggregate, and an alkaline stimulant, wherein the binder contains blast furnace slag fine powder, the fine aggregate contains the main ash of biomass combustion ash, and the alkaline stimulant contains biomass combustion ash.

[0045] Furthermore, in the method for producing the mortar composition for seaweed bed creation described herein, the binder used may include at least one selected from the group consisting of waste glass powder, waste ceramic powder, and bone ash.

[0046] Furthermore, in the method for producing the mortar composition for seaweed bed creation of this disclosure, the fine aggregate used may contain waste iron powder and / or bone phosphorus.

[0047] The method for producing the mortar composition for seaweed bed creation described herein yields the aforementioned mortar composition for seaweed bed creation, thus providing a mortar composition for seaweed bed creation composed solely of industrial by-products. Therefore, the method for producing the mortar composition for seaweed bed creation described herein allows for a significant reduction in the carbon dioxide emission intensity of the resulting mortar composition.

[0048] Furthermore, in the method for producing the mortar composition for seaweed bed creation described herein, the main ash of biomass combustion ash is used as fine aggregate, and the fly ash of biomass combustion ash is used as an alkaline stimulant, thereby enabling the utilization of woody biomass combustion ash, which would otherwise be discarded, regardless of the type of ash.

[0049] Furthermore, in the method for producing the mortar composition for seaweed bed creation described herein, the fine aggregate contains waste iron powder and / or bone phosphorus, which allows the resulting mortar composition for seaweed bed creation to be composed solely of industrial by-products while simultaneously imparting seaweed bed fertilizer components to the composition.

[0050] In the method for producing a mortar composition for seaweed bed formation according to this disclosure, the binder includes at least one selected from the group consisting of waste glass powder, waste ceramic powder, and bone ash, thereby enabling the resulting mortar composition for seaweed bed formation to be composed solely of industrial by-products while promoting the solidification reaction of the mortar. Therefore, according to the method for producing a mortar composition for seaweed bed formation according to this disclosure, the amount of binder used can be reduced as much as possible. [Examples]

[0051] The embodiments of the present invention will be further described below using experimental examples. The tests and evaluations of each experimental example will be carried out according to the following methods. In the following, unitless numerical values ​​or "parts" refer to mass unless otherwise specified.

[0052] <Blocks for creating seaweed beds> Seaweed bed creation blocks (test specimens) for Experimental Examples 1-25 were prepared, and laboratory mixing tests were conducted using the mixing ratios shown in Tables 1-4. The mixing ratio of the seaweed bed creation blocks resulted in a 28-day strength (compressive strength σ28) of 10 N / mm². 2 The strength was determined to be above (MPa). Furthermore, for the seaweed bed creation blocks in experimental examples 17-25, the 7-day strength (uniaxial compressive strength σ7) and mortar density (ρ) were also measured.

[0053] <Workability> The mortar composition constituting the test specimen was checked for fluidity after being mixed in a mixer for 5 minutes. Workability was evaluated according to the following criteria.

[0054] [Evaluation Criteria] Good: It has sufficient fluidity even without applying vibration. OK: The fluidity is sufficient when vibration is applied. Defective: No fluidity even when vibration is applied.

[0055] <Bleeding> The bleeding rate of the test specimens was measured in accordance with JSCE-F 522-2018 (Test method for bleeding rate and expansion rate of injection mortar in prepacked concrete (polyethylene bag method)). Bleeding was evaluated according to the following criteria.

[0056] [Evaluation Criteria] Good: The bleeding rate is less than 1%. Acceptable: The bleeding rate is between 1% and less than 3%. Poor: The bleeding rate is 3% or higher.

[0057] The following describes experimental examples. For each experimental example, Figure 2 shows the relationship between the proportion of blast furnace slag fine powder used as a binder and the compressive strength, Figure 3 shows the compressive strength of the mortar composition for seaweed bed creation, Figure 4 shows the compressive strength of the mortar composition for seaweed bed creation, and Figure 5 shows the relationship between the mass ratio of the binder and the uniaxial compressive strength.

[0058] [Experimental Example 1] The mixture consisted of 48.5 parts of biomass bottom ash as fine aggregate S, 35.0 parts of blast furnace slag fine powder as binder C, 1.8 parts of biomass fly ash as alkaline stimulant E, and 14.7 parts of tap water as mixing water W, with the ratio of mixing water W to the sum of binder C and alkaline stimulant E being 40%. The mixing ratio and evaluation results for Experimental Example 1 are shown in Table 1.

[0059] [Experimental Example 2] The mixture consisted of 52.3 parts of biomass bottom ash as fine aggregate S, 32.5 parts of blast furnace slag fine powder as binder C, 1.6 parts of biomass fly ash as alkaline stimulant E, and 13.6 parts of tap water as mixing water W, with the ratio of mixing water W to the sum of binder C and alkaline stimulant E being 40%. The mixing ratio and evaluation results for Experimental Example 2 are shown in Table 1.

[0060] [Experimental Example 3] The mixture consisted of 54.3 parts of biomass bottom ash as fine aggregate S, 30.0 parts of blast furnace slag fine powder as binder C, 1.5 parts of biomass fly ash as alkaline stimulant E, and 14.2 parts of tap water as mixing water W. The ratio of mixing water W to the sum of binder C and alkaline stimulant E was set to 45%. The mixing ratio and evaluation results for Experimental Example 3 are shown in Table 1.

[0061] [Experimental Example 4] The mixture consisted of 56.7 parts of biomass bottom ash as fine aggregate S, 27.5 parts of blast furnace slag fine powder as binder C, 1.4 parts of biomass fly ash as alkaline stimulant E, and 14.4 parts of tap water as mixing water W, with the ratio of mixing water W to the sum of binder C and alkaline stimulant E being 50%. The mixing ratio and evaluation results for Experimental Example 4 are shown in Table 1.

[0062] [Experimental Example 5] The mixture consisted of 59.2 parts of biomass bottom ash as fine aggregate S, 25.0 parts of blast furnace slag fine powder as binder C, 1.3 parts of biomass fly ash as alkaline stimulant E, and 14.5 parts of tap water as mixing water W. The ratio of mixing water W to the sum of binder C and alkaline stimulant E was set to 55%. The mixing ratio and evaluation results for Experimental Example 5 are shown in Table 1.

[0063] [Experimental Example 6] The mixture consisted of 62.2 parts of biomass bottom ash as fine aggregate S, 22.5 parts of blast furnace slag fine powder as binder C, 1.1 parts of biomass fly ash as alkaline stimulant E, and 14.2 parts of tap water as mixing water W, with the ratio of mixing water W to the sum of binder C and alkaline stimulant E being 60%. The mixing ratio and evaluation results for Experimental Example 6 are shown in Table 1.

[0064] [Experimental Example 7] The mixture consisted of 59.2 parts of biomass bottom ash as fine aggregate S, 20.0 parts of blast furnace slag fine powder as binder C, 5.0 parts of bone ash (tricalcium phosphate) as admixture D, 1.3 parts of biomass fly ash as alkaline stimulant E, and 14.5 parts of tap water as mixing water W. The ratio of mixing water W to the sum of binder C, admixture D, and alkaline stimulant E was set to 55%. The mixing ratio and evaluation results for Experimental Example 7 are shown in Table 2.

[0065] [Experimental Example 8] The mixture consisted of 59.2 parts of biomass bottom ash as fine aggregate S, 15.0 parts of blast furnace slag fine powder as binder C, 10.0 parts of bone ash (tricalcium phosphate) as admixture D, 1.3 parts of biomass fly ash as alkaline stimulant E, and 14.5 parts of tap water as mixing water W. The ratio of mixing water W to the sum of binder C, admixture D, and alkaline stimulant E was set to 55%. The mixing ratio and evaluation results for Experimental Example 8 are shown in Table 2.

[0066] [Experimental Example 9] The procedure was the same as in Experimental Example 7, except that waste ceramic powder (Si, Ca) was used instead of bone ash as admixture D. The mixing ratio and evaluation results for Experimental Example 9 are shown in Table 2.

[0067] [Experimental Example 10] The procedure was the same as in Experimental Example 8, except that waste ceramic powder (Si, Ca) was used instead of bone ash as admixture D. The mixing ratio and evaluation results for Experimental Example 10 are shown in Table 2.

[0068] [Experimental Example 11] The mixture for Experimental Example 11 was the same as in Experimental Example 7, except that the amount of biomass bottom ash used as fine aggregate S was set to 54.2 parts, and 5.0 parts of bone phosphorus (commercial fertilizer) was added as fertilizer F. The mixing ratio and evaluation results for Experimental Example 11 are shown in Table 3.

[0069] [Experimental Example 12] The composition of Experimental Example 12 was the same as in Experimental Example 11, except that the amount of biomass bottom ash used as fine aggregate S was 49.2 parts, and the amount of bone phosphorus used as fertilizer F was 10.0 parts. The composition ratio and evaluation results of Experimental Example 12 are shown in Table 3.

[0070] [Experimental Example 13] The composition of Experimental Example 13 was the same as in Experimental Example 11, except that the amount of biomass bottom ash used as fine aggregate S was 44.2 parts, and the amount of bone phosphorus used as fertilizer F was 15.0 parts. The composition ratio and evaluation results of Experimental Example 13 are shown in Table 3.

[0071] [Experimental Example 14] The composition of Experimental Example 14 was the same as in Experimental Example 11, except that the amount of biomass bottom ash used as fine aggregate S was 39.2 parts, and the amount of bone phosphorus used as fertilizer F was 20.0 parts. The composition ratio and evaluation results of Experimental Example 14 are shown in Table 3.

[0072] [Experimental Example 15] The experiment was conducted in the same manner as in Experimental Example 11, except that waste iron powder (waste hand warmer powder) was used instead of bone phosphorus as fertilizer F. The mixing ratio and evaluation results for Experimental Example 15 are shown in Table 3.

[0073] [Experimental Example 16] The composition of Experimental Example 16 was the same as in Experimental Example 15, except that the amount of biomass bottom ash used as fine aggregate S was 49.2 parts, and the amount of waste iron powder used as fertilizer F was 10.0 parts. The composition ratio and evaluation results of Experimental Example 16 are shown in Table 3.

[0074] [Experimental Example 17] The mixture consisted of 59.2 parts of biomass bottom ash as fine aggregate S, 25.0 parts of blast furnace slag fine powder as binder C, 1.3 parts of biomass fly ash as alkaline stimulant E, and 14.5 parts of tap water as mixing water W, with a mixing water ratio of 58% to binder C. The mixing ratio and evaluation results for Experimental Example 17 are shown in Table 4. The mixing ratio for Experimental Example 17 is the same as that for Experimental Example 5.

[0075] [Experimental Example 18] The composition of Experimental Example 18 was the same as in Experimental Example 17, except that 49.2 parts of biomass bottom ash were used as the fine aggregate S, and 10.0 parts of waste iron powder (waste hand warmer powder) were added as the fertilizer F. The composition ratio and evaluation results of Experimental Example 18 are shown in Table 4.

[0076] [Experimental Example 19] The composition of Experimental Example 19 was the same as in Experimental Example 17, except that 54.2 parts of biomass bottom ash were used as the fine aggregate S, and 5.0 parts of waste iron powder (waste hand warmer powder) were added as the fertilizer F. The composition ratio and evaluation results of Experimental Example 19 are shown in Table 4.

[0077] [Experimental Example 20] The mixture consisted of 59.2 parts of biomass bottom ash as fine aggregate S, 20.0 parts of blast furnace slag fine powder as binder C, 5.0 parts of waste ceramic powder (Si, Ca) as admixture D, 1.3 parts of biomass fly ash as alkaline stimulant E, and 14.5 parts of tap water as mixing water W. The ratio of mixing water W to the sum of binder C, admixture D, and alkaline stimulant E was set to 55%. The mixing ratio and evaluation results for Experimental Example 20 are shown in Table 4. The mixing ratio for Experimental Example 20 is the same as that for Experimental Example 9.

[0078] [Experimental Example 21] The composition of Experimental Example 21 was the same as in Experimental Example 20, except that 49.2 parts of biomass bottom ash were used as the fine aggregate S, and 10.0 parts of waste iron powder (waste hand warmer powder) were added as the fertilizer F. The composition ratio and evaluation results of Experimental Example 21 are shown in Table 4.

[0079] [Experimental Example 22] The composition of Experimental Example 22 was the same as in Experimental Example 21, except that the amount of biomass bottom ash used as fine aggregate S was set to 54.2 parts, and 5.0 parts of waste iron powder (waste hand warmer powder) was added as fertilizer F. The composition ratio and evaluation results of Experimental Example 22 are shown in Table 4.

[0080] [Experimental Example 23] The mixture consisted of 59.2 parts of biomass bottom ash as fine aggregate S, 15.0 parts of blast furnace slag fine powder as binder C, 10.0 parts of waste ceramic powder (Si, Ca) as admixture D, 1.3 parts of biomass fly ash as alkaline stimulant E, and 14.5 parts of tap water as mixing water W. The ratio of mixing water W to the sum of binder C, admixture D, and alkaline stimulant E was set to 55%. The mixing ratio and evaluation results for Experimental Example 23 are shown in Table 4. The mixing ratio for Experimental Example 23 is the same as that for Experimental Example 10.

[0081] [Experimental Example 24] The composition of Experimental Example 24 was the same as in Experimental Example 23, except that 49.2 parts of biomass bottom ash were used as the fine aggregate S, and 10.0 parts of waste iron powder (waste hand warmer powder) were added as the fertilizer F. The composition ratio and evaluation results of Experimental Example 24 are shown in Table 4.

[0082] [Experimental Example 25] The composition of Experimental Example 25 was the same as in Experimental Example 23, except that 54.2 parts of biomass bottom ash were used as the fine aggregate S, and 5.0 parts of waste iron powder (waste hand warmer powder) were added as the fertilizer F. The composition ratio and evaluation results of Experimental Example 25 are shown in Table 4.

[0083] [Table 1]

[0084] [Table 2]

[0085] [Table 3]

[0086] [Table 4]

[0087] Tables 1-4 and Figure 2 show that in Experimental Examples 1-25, seaweed bed creation blocks containing blast furnace slag fine powder as a binder, main ash from biomass combustion ash as fine aggregate, and fly ash from biomass combustion ash as an alkaline stimulant can be constructed solely from industrial by-products, and the carbon dioxide emission intensity can be significantly reduced.

[0088] Furthermore, as shown in Table 2 and Figure 3, in experimental examples 7 to 10, it was found that by including waste ceramic powder or bone ash as a binder, the mortar composition for seaweed bed creation could be made entirely of industrial by-products while accelerating the solidification reaction of the mortar.

[0089] Furthermore, as shown in Table 3 and Figure 4, in experimental examples 11 to 16, it was found that by including waste iron powder or bone phosphorus in the fine aggregate, it was possible to create a mortar composition for seaweed bed formation using only industrial by-products while simultaneously imparting seaweed bed fertilizer components to the seaweed bed formation blocks, thereby minimizing the amount of binder used.

[0090] Furthermore, Table 4 and Figure 5 show that in experimental examples 17-25, the optimal amount of binder was approximately 20% by mass, regardless of the amount of waste iron powder used.

[0091] The embodiments disclosed above include, for example, the following aspects:

[0092] <1> A mortar composition for creating seaweed beds comprising a binder, fine aggregate, and an alkaline stimulant, The binder contains blast furnace slag fine powder, The fine aggregate contains the main ash of biomass combustion ash, The aforementioned alkaline stimulant contains fly ash from biomass combustion ash. Mortar composition for creating seaweed beds.

[0093] <2> The aforementioned fine aggregate further contains waste iron powder. The aforementioned <1> Mortar composition for creating seaweed beds as described above.

[0094] <3> The fine aggregate further contains bone phosphorus, The aforementioned <1> or <2> Mortar composition for creating seaweed beds as described above.

[0095] <4> The aforementioned binder further contains waste glass powder. The aforementioned <1> ~ <3> A mortar composition for creating seaweed beds as described in any one of the following.

[0096] <5> The aforementioned binder further contains waste ceramic powder. The aforementioned <1> ~ <4> A mortar composition for creating seaweed beds as described in any one of the following.

[0097] <6> The binder further contains bone ash. The aforementioned <1> ~ <5> A mortar composition for creating seaweed beds as described in any one of the following.

[0098] <7> The aforementioned <1> ~ <6> A mortar composition for creating seaweed beds described in any one of the following, Including mixed water, Blocks for creating seaweed beds.

[0099] <8> A method for producing a mortar composition for creating seaweed beds, comprising the step of blending a binder, fine aggregate, and an alkaline stimulant, The binder contains blast furnace slag fine powder, The fine aggregate contains the main ash of biomass combustion ash, The aforementioned alkaline stimulant contains biomass combustion ash. A method for producing a mortar composition for creating seaweed beds.

[0100] Although embodiments of the present invention have been described above, the present invention is not limited to any particular embodiment, and various modifications and changes are possible within the scope of the invention as described in the claims.

Claims

1. A mortar composition for creating seaweed beds comprising a binder, fine aggregate, and an alkaline stimulant, The binder contains blast furnace slag fine powder, The fine aggregate contains the main ash of biomass combustion ash, The aforementioned alkaline stimulant contains fly ash from biomass combustion ash. Mortar composition for creating seaweed beds.

2. The aforementioned fine aggregate further contains waste iron powder. The mortar composition for creating seaweed beds according to claim 1.

3. The fine aggregate further contains bone phosphorus, The mortar composition for creating seaweed beds according to claim 1.

4. The aforementioned binder further contains waste glass powder. The mortar composition for creating seaweed beds according to claim 1.

5. The aforementioned binder further contains waste ceramic powder. The mortar composition for creating seaweed beds according to claim 1.

6. The binder further contains bone ash. The mortar composition for creating seaweed beds according to claim 1.

7. A mortar composition for creating seaweed beds according to any one of claims 1 to 6, Including mixed water, Blocks for creating seaweed beds.

8. A method for producing a mortar composition for creating seaweed beds, comprising the step of blending a binder, fine aggregate, and an alkaline stimulant, The binder contains blast furnace slag fine powder, The fine aggregate contains the main ash of biomass combustion ash, The aforementioned alkaline stimulant contains biomass combustion ash. A method for producing a mortar composition for creating seaweed beds.

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