Concrete structure

Abstract

To provide a concrete structure in which CO2 can be fixed in it and its surroundings, and which can supply CO2 to a target object without using an energy source such as an external power source.SOLUTION: A concrete structure has: a concrete member containing biochar; and a carbon dioxide adsorption / release layer containing an amine compound that covers at least a part of an area of a surface of the concrete member. The concrete member has a plurality of pores on the surface, and the carbon dioxide adsorption / release layer may be impregnated into the plurality of pores and cover at least a part of the area.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a concrete structure. [Background technology]

[0002] In recent years, the emission of greenhouse gases, one of the causes of global warming, has become a problem. Until the time of the Industrial Revolution, there was a balance between the emission of greenhouse gases and the absorption of greenhouse gases by the Earth, but now this balance is being lost. For this reason, efforts to reduce the emission of carbon dioxide (CO2), one of the greenhouse gases that is emitted in large quantities when manufacturing structures such as concrete, are being actively promoted, with the goal of achieving carbon neutrality by 2050, which would mean zero emissions of greenhouse gases overall.

[0003] One method for reducing CO2 emissions from structures such as concrete is to fix CO2 in the structure, etc. One known method for fixing CO2 is to use biochar, which is made by carbonizing granular or powdered biomass, in concrete as an admixture (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-160056 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the conventional technology described above, CO2 is only fixed to the structure itself, such as concrete, and there is a limit to the amount of CO2 that can be fixed.

[0006] One of the objectives of the embodiments of the present invention is to provide a concrete structure that can expand the fixation of CO2 not only within the concrete structure but also to the surrounding area of ​​the concrete structure, and also to provide a concrete structure that can supply CO2 to an object that requires it without using an energy source such as an external power source. [Means for solving the problem]

[0007] A concrete structure according to one embodiment of the present invention has a concrete member containing biochar and a carbon dioxide adsorption-release layer containing an amine compound that covers at least a partial area of ​​the surface of the concrete member.

[0008] The concrete member may have a plurality of pores on the surface, and the carbon dioxide sorption / release layer may be impregnated into the plurality of pores and cover at least a portion of the area.

[0009] The concrete member may further include an amine compound.

[0010] A heat conductive layer may further be provided between the concrete member and the carbon dioxide absorbing and releasing layer.

[0011] A concrete structure according to one embodiment of the present invention comprises a plurality of concrete members, each of which has a carbon dioxide adsorption / release layer containing an amine compound covering a partial area of ​​the surface, and a heat conduction layer provided between the carbon dioxide adsorption / release layer and the concrete members, the plurality of concrete members being arranged side by side so that the heat conduction layers are in thermal contact with each other.

[0012] A water barrier layer may further be provided between the concrete member and the carbon dioxide absorbing and releasing layer.

[0013] The concrete member may have a surface facing the heat-conducting member.

[0014] The concrete member may be a box-shaped block having an inner wall and an outer wall, and the carbon dioxide sorption / release layer may cover at least a part of the inner wall. [Effects of the Invention]

[0015] According to one embodiment of the present invention, it is possible to provide a concrete structure that can fix CO2 in and around the concrete structure. Furthermore, according to one embodiment of the present invention, it is possible to provide a concrete structure that can supply CO2 to a target object without using an energy source such as an external power source. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic perspective end view of one side showing the configuration of a concrete structure according to one embodiment of the present invention; [Figure 2] 1 is a schematic end view showing an enlarged portion of a concrete structure according to an embodiment of the present invention. [Figure 3] FIG. 2 is a schematic end view illustrating the phenomenon of carbon dioxide absorption by a concrete structure according to one embodiment of the present invention. [Figure 4] FIG. 2 is a schematic end view illustrating the phenomenon of carbon dioxide release from a concrete structure according to one embodiment of the present invention. [Figure 5] 1 is a schematic perspective end view of one side showing the configuration of a concrete structure according to one embodiment of the present invention; [Figure 6] 1 is a schematic end view of one side of a concrete structure according to an embodiment of the present invention; [Figure 7] 1 is a diagram showing an example of use of a concrete structure according to an embodiment of the present invention. FIG. [Figure 8] 1 is a diagram showing an example of use of a concrete structure according to an embodiment of the present invention. FIG. [Figure 9] 1 is a diagram showing an example of use of a concrete structure according to an embodiment of the present invention. [Figure 10]1 is a diagram showing an example of use of a concrete structure according to an embodiment of the present invention. [Figure 11] 1 is a diagram showing an example of use of a concrete structure according to an embodiment of the present invention. [Figure 12] 1 is a diagram showing an example of use of a concrete structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present disclosure will be described in detail below with reference to the drawings. Note that the present disclosure is not limited to the description of the following embodiments. Furthermore, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially identical. Furthermore, the components in the embodiments described below can be variously omitted, replaced, or modified without departing from the gist of the present disclosure. In the following embodiments, components necessary for illustrating the embodiments of the present disclosure will be described, and other components will be omitted.

[0018] In this specification, the expression "a structure exposed from another structure" means a state in which a part of a structure is not covered by another structure, and also includes a state in which this part not covered by another structure is covered by yet another structure.

[0019] In this specification, a concrete member refers to a hardened product that does not exhibit fluidity and is formed into a predetermined shape by hardening fresh concrete, which is made by mixing cement, water, aggregates such as sand and gravel, and admixtures.

[0020] First Embodiment A concrete structure 10 according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

[0021] (concrete structures) FIG. 1 is a schematic perspective end view on one side showing the configuration of a concrete structure according to one embodiment of the present invention.

[0022] The concrete structure 10 includes a concrete member 100 and a carbon dioxide absorbing and releasing layer 102 provided on the surface of the concrete member 100 .

[0023] As described above, the concrete member 100 is formed by hardening fresh concrete and has a variety of three-dimensional shapes, such as a rectangular parallelepiped, cylinder, square prism, pyramid, polyhedron, or curved shapes of these.

[0024] The concrete member 100 may have a shape suitable for use as a concrete block laid on roads or slopes, or as a concrete brick used in walls, fences, or flower beds, or as a curbstone, a slide block for various facilities, an anchor block, a safety block, a parking block, a pipe support block, or a U-shaped groove block.

[0025] The carbon dioxide absorption and release layer 102 is provided so as to cover at least a portion of the concrete member 100. Alternatively, the carbon dioxide absorption and release layer 102 may be provided so as to cover the entire surface of the concrete member 100. For example, as shown in FIG. 1 , the concrete structure 10 may have a rectangular parallelepiped concrete member 100 whose top surface 100T and side surfaces 100S are covered with the carbon dioxide absorption and release layer 102, and the bottom surface 100U may also be covered with the carbon dioxide absorption and release layer 102. The bottom surface 100U shown in FIG. 1 is the installation surface when the concrete structure 10 is installed.

[0026] (concrete components) The concrete member 100 will be described with reference to Fig. 2. Fig. 2 is a schematic end view showing the configuration of a concrete structure according to one embodiment of the present invention. Specifically, it is an end view showing an enlarged view of a portion 10A of the concrete structure 10 shown in Fig. 1.

[0027] The concrete member 100 includes fine aggregate 108S, coarse aggregate 108, and a hardening agent 110.

[0028] The concrete member 100 further includes biochar 104. The biochar 104 can also be considered a type of aggregate. The biochar 104 may be used in the concrete member 100 to replace a portion of the fine aggregate 108S. Note that biochar is carbonized organic matter (biomass) such as agricultural and forestry waste, waste wood, main cuttings or thinnings from forests, and food waste.

[0029] If left as is, the organic matter used as raw materials for biochar, such as those mentioned above, will be decomposed by microbial activity and released into the atmosphere as carbon dioxide. However, by mixing it into the concrete member 100 as biochar, the carbon can be trapped within the concrete member 100, making it possible to reduce its release into the atmosphere.

[0030] Biochar 104 is black and has the property of absorbing sunlight. Therefore, by including biochar 104 in concrete member 100, sunlight can be absorbed and the temperature of concrete member 100 can be increased.

[0031] The concrete member 100 may have a plurality of pores 106. The pores 106 may be formed during a water evaporation process or the like performed during the manufacturing of the concrete member 100. As another example, the pores 106 may be formed after the concrete structure 10 is constructed. The pores 106 are located inside the concrete member 100, on the surface (upper surface in FIG. 2) 100T, or near the surface. For example, as shown in FIG. 2, the pores 106-1 and 106-2 are located on the surface 100T of the concrete member 100, and the pores 106-3 to 106-5 are located inside the concrete member 100.

[0032] (carbon dioxide absorption / release layer) 1 and 2, the carbon dioxide sorption / release layer 102 will be described.

[0033] The carbon dioxide absorption and release layer 102 covers at least a portion of the surface 100T of the concrete member 100. For example, as shown in FIG. 1 , the carbon dioxide absorption and release layer 102 covers the top surface 100T and the side surface 100S of the concrete member 100. The carbon dioxide absorption and release layer 102 may cover the entire concrete member 100. Alternatively, the carbon dioxide absorption and release layer 102 may cover only a partial area of ​​the top surface 100T and the side surface 100S of the concrete member 100, or only a partial area of ​​the top surface 100T and the side surface 100S.

[0034] The carbon dioxide absorption and release layer 102 may cover the plurality of pores 106. The carbon dioxide absorption and release layer 102 may cover at least one or a portion of the plurality of pores 106. For example, as shown in FIG. 2, the carbon dioxide absorption and release layer 102 may cover the pore 106-2 located on the surface of the concrete member 100, but not cover the pore 106-1. Alternatively, the carbon dioxide absorption and release layer 102 may cover a portion of the pore 106-2 located on the surface of the concrete member 100, and not cover the other portions. The carbon dioxide absorption and release layer 102 may cover a combination of the above portions.

[0035] The carbon dioxide adsorption / release layer 102 can adsorb and release carbon dioxide using natural energy or renewable energy.

[0036] The phenomenon of carbon dioxide absorption and release in the concrete structure 10 will be described with reference to Figures 3 and 4. Figure 3 is a schematic end view illustrating the phenomenon of carbon dioxide absorption in a concrete structure according to one embodiment of the present invention. Figure 4 is a schematic end view illustrating the phenomenon of carbon dioxide release in a concrete structure according to one embodiment of the present invention.

[0037] When left in the atmosphere, the carbon dioxide adsorption / release layer 102 provided on the surface of the concrete member 100 adsorbs carbon dioxide mainly from the atmosphere at a first temperature or lower, as shown in FIG. 3 . The first temperature is the temperature at which the amine compound contained in the carbon dioxide adsorption / release layer 102, which will be described later, can adsorb carbon dioxide. The first temperature can be achieved in the atmosphere when the concrete structure 10 is not exposed to sunlight, such as early morning, evening, or nighttime. For example, by setting the first temperature to less than 40°C, or to 35°C or lower, or to 25°C or lower, adsorption by the carbon dioxide adsorption / release layer 102 can be achieved depending on the temperature of the concrete member 100.

[0038] When the carbon dioxide adsorption / release layer 102 is heated to a second temperature higher than the first temperature, or to a temperature equal to or higher than the first temperature, it can release carbon dioxide, as shown in Fig. 4. The second temperature is a temperature at which an amine compound, described later, can release carbon dioxide. Therefore, the first temperature and the second temperature can be determined appropriately in accordance with the properties of the amine compound, described later.

[0039] The second temperature can be achieved when sunlight hits the concrete structure 10, for example, during the daytime. As shown in FIG. 4, sunlight (indicated by the open arrow) heats the concrete member 100, which then heats the carbon dioxide adsorption / release layer, thereby achieving the second temperature. As another example, the second temperature can be achieved by placing the concrete member 100 near or in direct contact with a heat-emitting component. Examples of heat-emitting components include hot water pipes and exhaust pipes for internal combustion engines and furnaces. For example, the second temperature can be set to a temperature of 40°C or higher but lower than 100°C (a temperature in the low- to medium-temperature range) by using sunlight or a heat-emitting component. When the temperature of the concrete member 100 reaches the second temperature, carbon dioxide can be released from the carbon dioxide adsorption / release layer 102 without using an energy source such as an external power source.

[0040] For the above reasons, it is preferable that the carbon dioxide absorption / release layer 102 be provided on the heated concrete member 100. Since the concrete member 100 is heated in a location exposed to sunlight, it is preferable that the carbon dioxide absorption / release layer 102 be provided in a location exposed to sunlight on the concrete member 100. When reusing exhaust heat, it is preferable that the carbon dioxide absorption / release layer 102 be provided in an area where heat can be conducted from the heat exhaust member.

[0041] The carbon dioxide absorption / release layer 102 contains an amine compound, thereby being able to adsorb and release carbon dioxide. The carbon dioxide absorption / release layer 102 may further contain a solvent that dissolves the amine compound, or a substrate that holds the amine compound.

[0042] The amine compound may be a known amine compound that adsorbs and releases carbon dioxide, such as compound (1) described in International Publication No. 2022 / 085789. Alternatively, instead of the amine compound, a known porous metal-organic framework that adsorbs and releases carbon dioxide may be used, such as the porous metal-organic framework described in JP-A-2023-158570. Note that the amine compound or porous metal-organic framework may absorb carbon dioxide instead of adsorbing it at low temperatures.

[0043] The solvent for dissolving the amine compound may be a solvent for dissolving the compound (1) described in International Publication No. 2022 / 085789. The substrate may be a resin capable of dispersing and retaining the amine compound. For example, the resin may be a polyolefin.

[0044] The carbon dioxide adsorption / release layer 102 can be formed by applying an amine compound, a solvent in which an amine compound is dissolved, or a substrate holding an amine compound to the concrete member 100. Examples of application methods include painting or spraying the amine compound, a solvent in which an amine compound is dissolved, or a substrate holding an amine compound, similar to painting a paint. Another example of an application method is impregnating the concrete member 100 with the amine compound, a solvent in which an amine compound is dissolved, or a substrate holding an amine compound, followed by drying.

[0045] As described above, in the concrete structure 10, by providing the carbon dioxide adsorption / release layer 102 containing an amine compound on at least a partial region of the surface of the concrete member 100 containing biochar 104, the carbon dioxide adsorption / release layer 102 can adsorb and release CO2 depending on the temperature of the concrete member 100, without using an energy source such as an external power source. Furthermore, the CO2 released by the carbon dioxide adsorption / release layer 102 is supplied not only to the concrete structure 10 but also to its surroundings, thereby expanding the fixation of CO2. This allows the amount of CO2 fixed by the concrete structure 10 to be increased.

[0046] Second Embodiment In this embodiment, a concrete structure 20 having a thermally conductive layer 116 between a concrete member 100 and a carbon dioxide adsorption / release layer 102 will be described with reference to Fig. 5. Descriptions of configurations that are the same as or similar to those described in the first embodiment may be omitted. Fig. 5 is a schematic perspective end view of one side showing the configuration of a concrete structure according to one embodiment of the present invention.

[0047] The concrete structure 10 has a thermally conductive layer 116 between the concrete member 100 and the carbon dioxide adsorption / release layer 102. The thermally conductive layer 116 only needs to cover at least a portion of the surface of the concrete member 100. As shown in FIG. 5, the thermally conductive layer 116 covers the side surface 100S and the top surface 100T of the concrete member 100. Although not shown, the thermally conductive layer 116 may also cover a portion of each of the side surface 100S and the top surface 100T of the concrete member 100A. The thermally conductive layer 116 may cover the pores 106-2, which are part of the surface of the concrete member 100, without covering the pores 106-1, which are part of the surface of the concrete member 100, as shown in FIG. 2. The reverse may also be true.

[0048] The thermally conductive layer 116 may be made of a material having higher thermal conductivity than the concrete member 100, such as a metal or its oxide. Specific examples of materials with high thermal conductivity include copper, ceramic, and carbon nanotubes.

[0049] The thermally conductive layer 116 can transfer heat from the heated concrete member 100 to the carbon dioxide adsorption / release layer 102. Since the concrete member 100 is often handled as a single unit with a large capacity, it is prone to accumulating heat from sunlight, but by providing the thermally conductive layer 116, the heat accumulated in the carbon dioxide adsorption / release layer 102 can be more easily transferred.

[0050] As described above, in concrete structure 10B, by providing thermally conductive layer 116 between carbon dioxide adsorption / release layer 102 and concrete member 100, heat accumulated in concrete member 100 is more easily transferred to carbon dioxide adsorption / release layer 102. As a result, the amine compound contained in carbon dioxide adsorption / release layer 102 is heated to a temperature at which it can adsorb carbon dioxide in a short time, and can adsorb carbon dioxide for a longer period of time.

[0051] <Third embodiment> In this embodiment, a concrete structure 10 having a concrete member 100 between a concrete member 100 and a carbon dioxide adsorption / release layer 102 will be described with reference to Fig. 5 again. Descriptions of configurations that are the same as or similar to those described in the first or second embodiment may be omitted.

[0052] (concrete components) The concrete member 100 may contain an amine compound. The amine compound may be the same as the amine compound contained in the carbon dioxide absorption / release layer 102. By including an amine compound in the concrete member 100, the concrete member 100 can absorb and release CO2.

[0053] An amine compound may be included in the biochar. By mixing the biochar with the above-mentioned amine compound that adsorbs and releases carbon dioxide and allowing the amine compound to adsorb, the amine compound can be included in the biochar. Note that the concrete structure 10 may further include the above-mentioned carbon dioxide adsorption / release layer on the concrete member 100 containing the biochar with the amine compound adsorbed thereon.

[0054] As described above, in the concrete structure 10, by including an amine compound capable of adsorbing and releasing carbon dioxide in the concrete member 100, not only can the concrete member 100 fix CO2, but also CO2 from the atmosphere can be absorbed and fixed, thereby increasing the amount of CO2 fixed in the concrete structure 10. Furthermore, by having the amine compound adsorbed onto biochar, the concrete member can heat the amine compound without the intervention of a medium.

[0055] <Fourth embodiment> In this embodiment, a concrete structure 10 having a water barrier layer 118 between a concrete member 100 and a carbon dioxide adsorption / release layer 102 will be described with reference to Fig. 5 again. Descriptions of configurations that are the same as or similar to those described in the first to third embodiments may be omitted.

[0056] The concrete structure 10 may have a water barrier layer 118 between the concrete member 100 and the carbon dioxide absorption / release layer 102. The water barrier layer 118 is disposed so as to cover the concrete member 200.

[0057] A base material that prevents water from entering and allows carbon dioxide to pass through can be used for the water barrier layer 118. For example, a polyethylene microporous film, a polypropylene microporous film, a fluororesin porous film, or a film made of polyethylene resin and calcium carbonate can be used for the water barrier layer 118.

[0058] The water barrier layer 118 can prevent moisture discharged from the concrete member 100 from entering the carbon dioxide adsorption and release layer 102. The water barrier layer 118 is breathable. The waterproof and breathable water barrier layer 118 makes it difficult for the amine compound contained in the carbon dioxide adsorption and release layer 102 to come into contact with moisture.

[0059] As explained above, in the concrete structure 10, by providing the water barrier layer 118 between the concrete member 100 and the carbon dioxide adsorption / release layer 102, it is possible to suppress or prevent moisture from entering the carbon dioxide adsorption / release layer 102 and maintain the carbon dioxide adsorption and release function of the amine compound contained in the carbon dioxide adsorption / release layer 102. This reduces the need to replace a concrete structure 10 whose carbon dioxide adsorption / release function has deteriorated with a new concrete structure 10 or to re-apply the carbon dioxide adsorption / release layer 102 to the concrete member 100, which is economical.

[0060] Fifth Embodiment In this embodiment, a concrete structure 10B having a plurality of concrete members 100 will be described with reference to Fig. 6. Descriptions of configurations that are the same as or similar to those described in the first to fourth embodiments may be omitted. Fig. 6 is a schematic perspective end view of one side showing the configuration of a concrete structure according to one embodiment of the present invention.

[0061] When multiple concrete members 100 are used in a concrete structure 10B, the multiple concrete members 100 are arranged side by side so that the thermally conductive layers 116 provided on each of the multiple concrete members 100 are in thermal contact. For example, as shown in FIG. 6, concrete member 100A and concrete member 100B are arranged in contact with each other. As shown in FIG. 6, concrete member 100A and concrete member 100B are arranged so that a side surface 100AS-2 of concrete member 100A, which does not have a thermally conductive layer 116, is in contact with a side surface 100BS-1 of concrete member 100B, and so that thermally conductive layer 116A on concrete member 100A is in contact with thermally conductive layer 116B on concrete member 100B. Note that thermally conductive layer 116A and thermally conductive layer 116B only need to be in thermal contact as described above, and a medium such as carbon dioxide adsorption / desorption layer 102 may be provided between thermally conductive layer 116A and thermally conductive layer 116B.

[0062] By arranging the thermally conductive layers 116 provided on each of the multiple concrete members 100 side by side so that they are in thermal contact with each other, when at least one concrete member 100 is heated, heat can be transferred to the other concrete members 100.

[0063] As described above, in the concrete structure 10B, by arranging the heat conduction layer 116 provided between the multiple concrete members 100 and the carbon dioxide adsorption / release layer 102 so that they are in thermal contact with each other, it is possible to heat the concrete members 100 that are not heated by the heat source.

[0064] (Variation) Similarly, when the water barrier layer 118 is used in the concrete structure 10B, it is preferable that the water barrier layers 118 provided on each of the multiple concrete members 100 are arranged in a connected manner. By arranging the water barrier layers 118 in a connected manner, the carbon dioxide adsorption / release layer 102A can prevent moisture from entering from the adjacent concrete member 102B.

[0065] Sixth Embodiment In this embodiment, an example of using natural energy to heat a concrete member 100 will be described with reference to Figures 7 and 8. Descriptions of configurations that are the same as or similar to those described in the first to fifth embodiments may be omitted. Figures 7 and 8 are diagrams showing an example of use of a concrete structure according to one embodiment of the present invention.

[0066] 7 shows an example in which the concrete structure 10 is placed around a plant. Specifically, the concrete structure 10 is used in a flower bed. The concrete structure 10 is placed surrounding soil 3000 in which plants 1000 are planted. In the concrete structure 10, the carbon dioxide absorbing and releasing layer 102 is placed to cover the side and top surfaces of the concrete member 100 facing the plant 1000.

[0067] The concrete member 100 is heated by exposure to sunlight, and the carbon dioxide adsorption / release layer 102 is heated to a temperature equal to or higher than the second temperature at which the amine compound releases carbon dioxide. The heated carbon dioxide adsorption / release layer 102 releases carbon dioxide 2000 around the concrete structure 10. As a result, the fixation of CO2 by the concrete structure 10 is expanded not only to the concrete structure 10 but also to its surroundings. The carbon dioxide 2000 released around the concrete structure 10 is supplied to the plants 1000. Furthermore, because cement and biochar are alkaline, the concrete member 100 containing these is alkaline, and the concrete member 100 is heated, so the concrete structure 10 can suppress weeds in areas in contact with the concrete structure 10.

[0068] In the concrete structure 10, the concrete member 100 absorbs and retains water, and therefore the absorbed and retained water can also be supplied to the plants 1000.

[0069] FIG. 8 shows an example in which the concrete structure 10 is placed around plants. Specifically, the concrete structure 10 is used for the wall of the exterior of a building, etc. As shown in FIG. 8, the concrete structure 10 is placed on one side of soil 3000 in which plants 1000 are planted, and the carbon dioxide absorption and release layer 102 faces the plants 1000 and covers the side and top surfaces of the concrete member 100 that are exposed to sunlight. In this way, the concrete structure 10 can be used as an exterior wall material, without generating any additional waste.

[0070] As described above, by using natural energy to heat the concrete member 100, no energy costs are incurred.

[0071] Seventh Embodiment In this embodiment, an example of using recycled energy to heat a concrete member 100 will be described with reference to Figures 9 to 11. Description of configurations that are the same as or similar to those described in the first to fifth embodiments may be omitted. Figures 9 to 11 are diagrams showing an example of use of a concrete structure according to one embodiment of the present invention.

[0072] FIG. 9 shows an example in which exhaust heat from a heat exhaust member 124 is used as a heat source to heat a concrete member 100. The concrete structure 10 has a box-shaped block concrete member 100. The concrete member 100 has an exterior wall 100E and an interior wall 100L. The concrete member 100 has a carbon dioxide adsorption / release layer 102 on the exterior wall 100E. The concrete member 100 has a hole 126 penetrating the concrete member 100. A heat exhaust member 124, such as a pipe, can be passed through the hole 126 penetrating the concrete member 100. The hole 126 is formed by the inner wall 100L of the concrete member 100. The inner wall 100L of the concrete member 100 needs only to be in thermal contact with the heat exhaust member 124, and may be in direct contact, or may not be in direct contact, as shown in FIG. 9.

[0073] 10 shows another example in which exhaust heat from a heat exhaust member 124 is used as a heat source for heating a concrete member 100. The concrete structure 10 has a U-shaped gutter concrete member 100. The concrete member 100 has a surface facing a heat exhaust member 124 such as a pipe. In FIG. 14, the surface facing the heat exhaust member 124 such as a pipe corresponds to the wall surface of an inner wall 100L of the concrete member 100.

[0074] The concrete structure 10 is installed so as to cover the heat exhaust member 124. The concrete member 100 has a recess 100F. By installing the concrete structure 10 so that the recess 100F faces the installation surface, the concrete structure 10 can cover the heat exhaust member 124. By installing the U-shaped gutter with the recess 100F facing the installation surface, the exhaust heat can be contained within the concrete member 100. However, the installation method of the concrete structure 10 is not limited to this.

[0075] FIG. 11 shows another example in which exhaust heat from a heat exhaust member 124 is used as a heat source to heat a concrete member 100. The concrete structure 10 is used as a wall for an exterior structure or the like. The concrete member 100 has a pair of large side surfaces 100S-1 and a top surface 100T that is smaller than the side surfaces. A carbon dioxide adsorption / release layer 102 is provided on one side surface 100S-1 and the top surface 100T of the concrete member 100, and a heat exhaust member 124 is installed on the other side surface 100S-2 of the concrete member 100. In FIG. 11, a pipe serving as the heat exhaust member 124 is installed so as to run along the other side surface 100S-2 of the concrete member 100. Because the side surface 100S of the concrete member 100 has a large area, installing the pipe serving as the heat exhaust member 124 so as to run along the other side surface 100S-2 increases the thermal contact area between the pipe and the wall, allowing the exhaust heat from the pipe to be efficiently conducted to the concrete member 100.

[0076] As described above, by using recycled energy to heat the concrete member 100, no energy costs are incurred.

[0077] (Variation) Referring again to FIG. 9, a case where a plurality of concrete members 100 having holes 126 therethrough are used will be described.

[0078] When multiple concrete members 100 with through holes 126 are used in the concrete structure 10, the multiple concrete members 100 can be arranged side by side so that the holes 126 formed in each of the multiple concrete members 100 are continuous. By having the holes 126 continuous, the air inside the holes 126 of the multiple concrete members 100 can circulate throughout the multiple concrete members 100, allowing heat to be supplied over a wide area.

[0079] Eighth Embodiment In this embodiment, a concrete structure 20 having a carbon dioxide adsorption / release layer 102 provided inside a concrete member 100 will be described with reference to Fig. 12. Descriptions of configurations that are the same as or similar to those described in the first to fifth embodiments may be omitted.

[0080] FIG. 12 is a schematic end view showing the configuration of a concrete structure according to one embodiment of the present invention.

[0081] The concrete structure 20 has a concrete member 100, which is a box-shaped block. The concrete member 100 may have a storage space 120 in which items can be stored. The concrete member 100 may have an inner wall 100L on the inside that surrounds the storage space 120, and an outer wall 100E on the outside that surrounds the inner wall 100L.

[0082] The inner wall 100L of the concrete member 100 may be covered with a carbon dioxide absorption and release layer 102. At least a portion of the inner wall 100L may be covered with the carbon dioxide absorption and release layer 102. For example, as shown in FIG. 12, the inner wall 100L is covered with the carbon dioxide absorption and release layer 102. By covering the inner wall 100L with the carbon dioxide absorption and release layer 102, the storage space 120 can be made into a CO2 atmosphere. By making the storage space 120 into a CO2 atmosphere in this way, the concrete structure 20 can function as a curing tank for concrete blocks 122, as shown in FIG. 10, for example.

[0083] As described above, by providing the carbon dioxide absorbing and releasing layer 102 inside the box-shaped concrete member 100, the concrete structure 20 can be cured without incurring energy costs.

[0084] The above-described embodiments of the present invention can be combined as appropriate as long as they are not mutually inconsistent. A product in which a person skilled in the art appropriately adds or deletes components or modifies the design based on each embodiment is also included within the scope of the present invention as long as it includes the gist of the present invention.

[0085] Even if there are other effects and advantages different from those brought about by the above-described embodiments, those that are clear from the description in this specification or that can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0086] 10: concrete structure, 10A: concrete structure, 10B: concrete structure, 20: concrete structure, 100: concrete member, 100A: concrete member, 100AS-2: side surface, 100B: concrete member, 100BS-1: side surface, 100E: outer wall, 100F: recess, 100L: inner wall, 100S: side surface, 100S-1: side surface, 100S-2: side surface, 100T: upper surface, 100U: lower surface, 102: carbon dioxide adsorption / release layer, 102A: carbon dioxide adsorption / release Outlet layer, 102B: concrete member, 104: biochar, 106: pores, 106-1: pores, 106-2: pores, 106-3: pores, 106-5: pores, 108: coarse aggregate, 108S: fine aggregate, 110: hardener, 116: thermally conductive layer, 116A: thermally conductive layer, 116B: thermally conductive layer, 118: water barrier layer, 120: storage space, 122: concrete block, 124: heat exhaust member, 126: hole, 200: concrete member, 1000: plants, 2000: carbon dioxide, 3000: soil

Claims

1. a concrete member containing biochar; a carbon dioxide adsorption / release layer containing an amine compound covering at least a portion of the surface of the concrete member; Concrete structure.

2. The concrete member has a plurality of pores on the surface thereof, the carbon dioxide sorption / release layer is impregnated into the plurality of pores and covers at least a portion of the region; The concrete structure according to claim 1.

3. The concrete member further contains the amine compound. The concrete structure according to claim 1.

4. A heat conductive layer is further provided between the concrete member and the carbon dioxide absorption and release layer. The concrete structure according to claim 1.

5. A plurality of concrete members; a carbon dioxide adsorption / release layer containing an amine compound covering a portion of the surface of each of the plurality of concrete members; a heat conduction layer provided between the carbon dioxide absorption and release layer and each of the plurality of concrete members, The plurality of concrete members are arranged side by side so that the thermally conductive layers are in thermal contact with each other. Concrete structure.

6. A water barrier layer is further provided between the concrete member and the carbon dioxide absorption and release layer. The concrete structure according to claim 1 or 5.

7. The concrete member has a surface facing the heat exhaust member. The concrete structure according to claim 1 or 5.

8. the concrete member is a box-shaped block having an inner wall and an outer wall, The carbon dioxide adsorption / release layer covers at least a portion of the inner wall. The concrete structure according to claim 1.

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