Resource circulation system for cement / concrete-based materials

Abstract

Provided is a resource circulation system for cement / concrete-based materials, which clarifies whether or not utilized limestone is manufactured on the basis of already decarbonated Ca derived from waste and the like by managing, for resources used for producing the cement / concrete-based materials, data relating to the amount of calcium derived from waste and the like and data relating to the amount of calcium derived from limestone, and which is capable of reducing the non-energy source CO2 emission amount by ascertaining the non-energy source CO2 emission amount in the movement (from production to disposal) of the cement / concrete-based materials.　A resource circulation system 1 for cement / concrete-based materials is provided with nodes that each constitute a network 100 and that manage data relating to cement / concrete-based material production. At least, a node 10 records limestone-derived calcium amount data 12 in the network 100. At least, a node 20 records waste-and-the-like-derived calcium amount data 22 in the network 100. At least, a node 30 links the limestone-derived calcium amount data 12 and the waste-and-the-like-derived calcium amount data 22 to cement / concrete-based material data 32, which is given to the produced cement / concrete-based materials, and records the linked cement / concrete-based material data 32 to the network 100.

Description

Resource circulation system for cement and concrete materials

[0001] The present invention relates to a resource circulation system for cement and concrete materials that manages the resource circulation of cement and concrete materials.

[0002] The Japanese government has declared that it will aim to achieve carbon neutrality by 2050, which means reducing greenhouse gas emissions to zero overall. ２ It means subtracting the "absorption" through afforestation, forest management, etc. from the "emissions" of greenhouse gases, including carbon dioxide (CO2), to make the total essentially zero. In other words, to achieve carbon neutrality, it is necessary to reduce greenhouse gas emissions and maintain and strengthen absorption (see, for example, Non-Patent Document 1).

[0003] In the cement and concrete sector, the main product is Portland cement, which is produced by high-temperature burning using limestone as a raw material. ２ In addition to CO emissions, non-energy-derived CO ２ Therefore, in addition to the general carbon neutralization measures used in other fields, CCUS (carbon capture, utilization, and storage) technology is also required (see, for example, Non-Patent Document 2). CCUS technology includes CO captured from exhaust gas during cement production. ２ The CaO component is extracted from limestone (main component: CaCO3) in cement production as decarbonated calcium (Ca) derived from concrete waste and waste materials such as by-products of concrete production and waste materials made from by-products. ３ ) as an alternative raw material. Specifically, CCUS technology involves the use of CO captured from exhaust gas during cement production. ２ is contacted with a source of Ca and magnesium (Mg) to produce chemically stable CaCO ３ and magnesium carbonate (MgCO ３ Carbonation technology is effective in converting this into carbonate resources such as coal.

[0004] What is Carbon Neutral? - Decarbonization Portal - Ministry of the Environment, Internet <URL: https: / / ondankataisaku.env.go.jp / carbon_neutral / about / > Takafumi Noguchi / Towards a Carbon Neutral Era - Expectations for Cement, Cement & Concrete, No. 900, pp. 4-9, 2022

[0005] By using decarbonated Ca derived from waste materials and by-products as an alternative raw material to limestone, non-energy-derived CO emissions can be reduced by reducing the amount of natural limestone used. ２ However, since it is difficult to determine whether the used Ca was produced from decarbonated Ca derived from waste, etc., it is difficult to determine whether the used Ca was produced from decarbonated Ca derived from waste, etc. ２ It was difficult to gauge whether emissions were being reduced.

[0006] In other words, non-energy-derived CO ２ In order to grasp whether emissions are being reduced, it is necessary to clearly determine whether the limestone used is produced from already decarbonated Ca derived from waste, etc. Therefore, the present invention clarifies whether the used Ca is produced from already decarbonated Ca derived from waste, etc. by managing data on the amount of calcium derived from limestone and data on the amount of calcium derived from waste, etc., which are resources used to produce cement / concrete-based materials such as cement, mortar, and concrete, and by managing data on the amount of calcium derived from waste, etc., it is possible to clarify whether the used Ca is produced from already decarbonated Ca derived from waste, etc., and to reduce non-energy-origin CO emissions in the movement of cement / concrete-based materials (from production to disposal). ２ By understanding emissions, non-energy-related CO ２ The objective of this project is to provide a resource circulation system for cement and concrete materials that can lead to a reduction in emissions.

[0007] As a result of intensive research into solving the above problems, it was discovered that the above problems can be solved by managing data on the amount of calcium derived from limestone and waste, which are resources used to produce cement and concrete materials, over a network in order to clearly determine whether the limestone used was produced from already decarbonated Ca derived from waste, etc. The present invention was completed based on the above findings. The present invention is as follows.

[0008] [1] A resource circulation system for cement and concrete-based materials comprising nodes that each form a network and manage data related to the production of cement and concrete-based materials, wherein at least one of the nodes calculates an amount of limestone-derived calcium, which is obtained from limestone as a raw material, among the calcium used in the production of the cement and concrete-based materials, generates data on the calculated amount of limestone-derived calcium, and records the data on the limestone-derived calcium amount in the network; at least one of the nodes calculates an amount of already decarbonated calcium derived from waste or other materials, which is obtained from waste or by-products as raw materials, among the calcium used in the production of the cement and concrete-based materials, generates data on the calculated amount of waste-derived calcium, and records the data on the network; and at least one of the nodes links the limestone-derived calcium amount data and the waste-derived calcium amount data to cement and concrete-based material data that is assigned to the produced cement and concrete-based materials, and records the linked cement and concrete-based material data in the network. [2] The resource circulation system for cement / concrete-based materials according to [1], wherein at least one of the nodes keeps track of the movement of the produced cement / concrete-based material and records tracking data in the network. [3] The resource circulation system for cement / concrete-based materials according to [1] or [2], wherein at least one of the nodes identifies cement / concrete-based materials in which the ratio of limestone-derived calcium to the calcium used in their production is 98% or less. [4] The resource circulation system for cement / concrete-based materials according to any of [1] to [3], wherein the cement / concrete-based material is at least one of cement, mortar, and concrete. [5] The resource circulation system for cement / concrete-based materials according to any of [1] to [4], wherein the method for distinguishing between limestone-derived calcium and waste-derived calcium is a comprehensive judgment based on analytical results obtained by observing particle shape using a SEM, quantifying trace elements using XRF, and quantifying trace elements using ICP-OES.[6] The resource circulation system for cement and concrete-based materials according to any one of [1] to [5], wherein the network is a blockchain network. [7] Energy-derived CO2 when at least one of the nodes uses limestone-derived calcium made from limestone. ２ Add data on emissions to the limestone-derived calcium amount data, and at least one of the nodes calculates the amount of CO2 emitted from energy sources when using already decarbonated calcium derived from waste or by-products. ２ The resource circulation system for cement / concrete-based materials according to any one of [1] to [6], wherein data on the amount of calcium emitted is added to the data on the amount of calcium derived from waste, etc.

[0009] According to the present invention, by managing data on the amount of calcium derived from limestone and the amount of calcium derived from waste, etc., which are resources used to produce cement and concrete materials, it is possible to clarify whether the used Ca has been produced from already decarbonated Ca derived from waste, etc., and to determine the amount of non-energy-derived CO2 in the movement of cement and concrete materials (from production to disposal). ２ By understanding emissions, non-energy-related CO ２ It is possible to provide a resource circulation system for cement and concrete materials that can lead to a reduction in emissions.

[0010] 1 is a conceptual diagram showing an example of a resource circulation system for cement / concrete-based materials according to an embodiment of the present invention. FIG.

[0011] A resource circulation system 1 for cement / concrete-based materials according to an embodiment of the present invention (hereinafter sometimes simply referred to as "the present embodiment") includes nodes 10, 20, 30, 40, 50, and 60, each of which constitutes a network 100 and manages data related to the production of cement / concrete-based materials, as shown in Figure 1. The cement / concrete-based materials in this specification are at least one of cement, mortar, and concrete.

[0012] The network 100 of the present invention connects nodes on an information and communication network, and uses cryptographic technology to process and record limestone-derived calcium content data, waste-derived calcium content data, and cement and concrete material data in a distributed manner. The network 100 is an information and communication network such as the Internet, an intranet, a cloud network, or a blockchain network, and is preferably a blockchain network. By using digital signatures and hash pointers, the network 100 can achieve high availability and data integrity by storing the data, which has a data structure that makes tamper detection easy, across multiple distributed nodes. A consortium-type blockchain is preferably used as the blockchain network, but other formats, such as a public blockchain, may also be used.

[0013] Although the number of nodes in the resource circulation system 1 for cement and concrete-based materials is shown as six in FIG. 1 , it is not limited to six and may be five or less, or seven or more. The nodes in the resource circulation system 1 for cement and concrete-based materials are communicatively connected to each other via a network 100. Each node has a memory unit capable of storing the above data. As the memory unit, for example, a storage medium such as a ROM, a RAM, or a hard disk can be used. Each node has an input unit that inputs and stores data in the memory unit. As the input unit, a user interface of an information processing device can be used, for example, a mouse, a keyboard, a touch panel, a voice input device, etc.

[0014] At least one node 10 constituting the network 100 calculates the amount of limestone-derived Ca, which is derived from limestone, among the calcium used in producing cement / concrete-based materials. A method for calculating the amount of limestone-derived Ca, which is derived from limestone, will be described later. The node 10 then generates limestone-derived calcium amount data 12 from the calculated amount of limestone-derived Ca, which is derived from limestone, among the calcium used in cement / concrete-based materials. The limestone-derived calcium amount data 12 is data related to the amount of Ca derived from limestone, which is derived from limestone, among the calcium used in cement / concrete-based materials. The node 10 then records the limestone-derived calcium amount data 12 in a memory unit 11 provided in the node 10. Recording the limestone-derived calcium amount data 12 in a memory unit 11 provided in a node 10 constituting the network 100 is synonymous with recording the limestone-derived calcium amount data 12 in the network 100.

[0015] At least one node 20 constituting the network 100 calculates the amount of already decarbonated waste-derived Ca derived from wastes made from wastes and by-products as raw materials, out of the calcium used in the production of cement / concrete-based materials. A method for calculating the amount of already decarbonated waste-derived Ca derived from wastes made from wastes and by-products as raw materials will be described later. The node 20 then generates waste-derived calcium amount data 22 from the calculated amount of already decarbonated waste-derived calcium derived from wastes made from wastes and by-products as raw materials. The waste-derived calcium amount data 22 is data related to the amount of already decarbonated waste-derived Ca derived from wastes made from wastes and by-products as raw materials, out of the calcium used in the cement / concrete-based materials. The node 20 then records the waste-derived calcium amount data 22 in a memory unit 21 provided in the node 20. Recording the waste-derived calcium amount data 22 in the memory unit 21 provided in the node 20 constituting the network 100 is synonymous with recording the waste-derived calcium amount data 22 in the network 100.

[0016] Below is an example of how to calculate the amount of calcium derived from limestone when limestone is used as a raw material, and the amount of calcium derived from already decarbonated waste, etc., when waste and by-products are used as raw materials. First, formula (1) is shown for calculating the carbon dioxide fixation rate (mass%) due to the carbonation reaction of cement and concrete materials: CO2 = 0.7848 (CaO - 0.5603CaCO3 - 0.7005SO3) + 1.092MgO + 1.420Na2O + 0.9344K2O... (1) The process for deriving each coefficient in formula (1) is shown below. 0.7848≒CO2 (molecular weight 44.01g / mol) ÷CaO (molecular weight 56.0774g / mol) 0.5603≒CaO (molecular weight 56.08g / mol) ÷CaCO3 (molecular weight 100.087g / mol) 0.7005≒CaO (molecular weight 56.08g / mol) ÷ SO3 (molecular weight 80.06g / mol) 1.092≒CO2 (molecular weight 44.01g / mol) ÷MgO (molecular weight 40.3044g / mol) 1.420≒2×CO2 (molecular weight 44.01g / mol) ÷ Na2O (molecular weight 61.979g / mol) 0.9344≒2×CO2 (molecular weight 44.01g / mol) ÷K2O (molecular weight 94.196g / mol) Next, the amount of calcium carbonate (CaCO ) in the cement / concrete material derived from formula (1) ３ The formula (2) for calculating the amount of CaCO3 is shown below. Amount of CaCO3 = 1.785CaO - 1.250SO3 - 2.274CO2 + 2.483MgO + 3.229Na2O + 2.126K2O... (2) The chemical composition of the target cement and concrete materials is CaO, SO ３ MgO, Na ２ O.K. ２ Each content (mass%) of O and CO ２ The content (mass%) of each chemical composition in the cement / concrete material and CO ２ The content (mass%) can be determined by analysis. ２ Regarding the content (mass%), for example, the target object is heated and completely oxidized, and the total carbon analysis of the released gas, or CO ２It is advisable to calculate it using the infrared analysis measurement method. The content (mass%) of each chemical composition in the target cement / concrete material and CO ２ By substituting the content (mass%) into equation (2), the amount of calcium carbonate (CaCO ) in the cement / concrete material can be calculated. ３ The calculated amount of calcium carbonate (CaCO ３ The amount of calcium carbonate in the cement / concrete material calculated by formula (2) corresponds to the amount of calcium carbonate derived from limestone and wastes and by-products that have already been decarbonated. ３ Formula (3) is used to calculate the amount of calcium oxide (CaO amount) contained in calcium carbonate from the content (mass%) of calcium oxide in the cement / concrete material. CaO amount in CaCO3 = amount of CaCO3 × molecular weight of CaO (56.08 g / mol) / molecular weight of CaCO3 (100.087 g / mol) = amount of CaCO3 × 0.5604... (3) Then, the calcium carbonate (CaCO3) can be calculated from the content (mass%) of calcium oxide in the cement / concrete material. ３ ) and gypsum (CaSO ４ The net amount of calcium oxide (CaO amount) in the cement / concrete material is calculated by subtracting the amount of calcium oxide (CaO amount) contained in the waste material. The calculated net amount of calcium oxide (CaO amount) corresponds to the amount of CaO that has already been decarbonated from waste, etc.

[0017] Examples of decarbonated waste-derived calcium derived from waste and by-products include by-product slaked lime such as acetylene-byproduct slaked lime, waste concrete blocks, fine powder generated from waste concrete blocks, concrete sludge (dehydrated cake) generated in ready-mix concrete plants and concrete product plants, incineration ash (coal ash, woody biomass, municipal waste incineration ash, sewage sludge incineration ash, etc.), steel slag (converter slag, electric furnace slag, etc.), and biomass such as scallop shells and eggshells. Among these, by-product slaked lime, which has a lower impurity content than decarbonated waste-derived calcium derived from other waste and by-products, is preferred. Examples of by-product slaked lime include by-product slaked lime produced during the calcium carbide process for acetylene gas production (wet and dry products are available depending on the acetylene gas production method), and acetylene-byproduct slaked lime, such as by-product slaked lime contained in dust captured during the wet dust collection process of calcium carbide electric furnaces. The by-product slaked lime contains, for example, 65 to 95% (preferably 70 to 90%) calcium hydroxide, 1 to 10% calcium carbonate, and 0.1 to 6.0% (preferably 0.1 to 3.0%) iron oxide. These proportions are determined by the mass loss (Ca(OH) ２ : Around 405 ° C to 515 ° C, CaCO ３ The volume average particle size measured by the laser diffraction / scattering method is about 50 to 100 μm. Furthermore, the moisture content measured by the loss on drying method in JIS K 0068 "Method for measuring moisture content in chemical products" is preferably 10% or less. ２ S ３ , and CaC ２ Sulfur compounds such as CaS may be included, but it is preferable that the content is 2% or less.

[0018] At least one node 30 constituting the network 100 links the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22 to cement-concrete-based material data 32 assigned to the produced cement-concrete-based material. Then, the node 30 records the cement-concrete-based material data 32 linked to the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22 in a memory unit 31 provided in the node 30. Recording the cement-concrete-based material data 32 linked to the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22 in the memory unit 31 provided in the node 30 constituting the network 100 is synonymous with recording the cement-concrete-based material data 32 linked to the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22 in the network 100.

[0019] At least one node 40 constituting the network 100 refers to the cement / concrete-based material data 32, grasps the movement of the produced cement / concrete-based material, and creates tracking data (not shown) in the network 100. The node 40 then records the tracking data in a memory unit 41 provided in the node 40. Recording the tracking data in the memory unit 41 provided in the node 40 constituting the network 100 is synonymous with recording the tracking data in the network 100. By recording the tracking data in the network 100, it is possible to grasp the movement of the cement / concrete-based material (from production to disposal) by accessing the network 100 and referring to the tracking data, and it is possible to grasp the movement of the amount of limestone-derived calcium used in the cement / concrete-based material and the amount of calcium derived from waste, etc., by the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22 linked to the cement / concrete-based material data 32 of the cement / concrete-based material.

[0020] At least one node 50 constituting the network 100 calculates the ratio of limestone-derived calcium in the calcium used in the production of the cement / concrete-based material by referencing the cement / concrete-based material data 32 linked to the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22, and creates ratio calculation data (not shown). The node 50 then refers to the ratio calculation data to identify cement / concrete-based materials in which the ratio of limestone-derived calcium is 98% or less, and records in the cement / concrete-based material data 32 of the cement / concrete-based material in which the ratio of limestone-derived calcium is 98% or less as an excellent ratio. The node 50 then records the ratio calculation data in a memory unit 51 provided in the node 50. Recording the ratio calculation data in the memory unit 51 provided in the node 50 constituting the network 100 is synonymous with recording the ratio calculation data in the network 100. By using a cement / concrete-based material in which the ratio of limestone-derived calcium is 98% or less identified by the node 50, non-energy-derived CO emissions associated with a reduction in the amount of natural limestone used can be reduced. ２ It is possible to reduce CO emissions ２ The ratio of limestone-derived calcium identified by the node 50 can be reduced to 98% or less, which leads to a significant reduction in CO emissions. ２ Although the effect of reducing emissions can be obtained, the threshold for discrimination is not limited to 98%. For example, ２ It may be set to 96% or 94%, which is effective in reducing emissions.

[0021] At least one node 60 constituting the network 100 generates raw material identification data (not shown) that identifies whether the calcium used in the production of the cement / concrete-based material is limestone-derived calcium or waste-derived calcium. For example, the node 60 can generate the raw material identification data by referencing the cement / concrete-based material data 32 linked to the limestone-derived calcium amount data 12 and the waste-derived calcium amount data 22. The node 60 can also include in the raw material identification data the ratio of limestone-derived calcium to waste-derived calcium in the calcium used in the production of the cement / concrete-based material. The node 60 then records the raw material identification data in a memory unit 61 included in the node 60. Recording the raw material identification data in the memory unit 61 included in the node 60 constituting the network 100 is synonymous with recording the raw material identification data in the network 100. Methods for identifying whether calcium used in the production of cement / concrete-based materials is limestone-derived calcium or waste-derived calcium include, in addition to referring to the cement / concrete-based material data 32, observation of particle shape by SEM, quantification of trace elements by XRF, and analytical results of quantification of trace elements by ICP-OES. It is preferable to comprehensively determine the identification of calcium used in the production of cement / concrete-based materials from the analytical results of observation of particle shape by SEM, quantification of trace elements by XRF, and quantification of trace elements by ICP-OES.

[0022] According to the resource circulation system 1 for cement / concrete-based materials of this embodiment, limestone-derived calcium amount data 12 and waste-derived calcium amount data 22 are linked to the cement / concrete-based material data 32 assigned to the produced cement / concrete-based material, so by referring to the cement / concrete-based material data 32, it is possible to clarify whether the limestone used as a raw material was produced from already decarbonated Ca derived from waste, etc., and the amount of calcium derived from waste, etc. used as a raw material. Then, according to the resource circulation system 1 for cement / concrete-based materials of this embodiment, by managing the limestone-derived calcium amount data and waste-derived calcium amount data of the resources used to produce the cement / concrete-based material and ensuring that limestone produced from already decarbonated Ca derived from waste, etc. accounts for the majority of the limestone used as a raw material, it is possible to reduce non-energy-origin CO emissions associated with a reduction in the amount of natural limestone used. ２ It is possible to reduce CO emissions ２ This can lead to a reduction in emissions.

[0023] [Modification of the Embodiment] The resource circulation system 1 for cement / concrete-based materials according to this embodiment may further include a node and a storage unit (not shown) for handling ownership data related to the ownership of the cement / concrete-based materials and resources used to produce the cement / concrete-based materials. The ownership data is data indicating the origin and location of the cement / concrete-based materials and resources, etc., and is data for managing the origin and location of the cement / concrete-based materials and resources, etc. By recording the ownership data on the network 100 so that it moves along with the movement of the cement / concrete-based materials and resources, etc., it is possible to manage the current location, as well as the origin and past locations of the cement / concrete-based materials and resources, etc. By managing the ownership data, it is also possible to grasp the movement of the amount of limestone-derived calcium used in the cement / concrete-based materials and the amount of calcium derived from waste, etc. Owners recorded as ownership data include, but are not limited to, manufacturers and importers / exporters who may own cement / concrete materials and resources, demolition companies, recycling companies, consulting companies, design companies, construction companies, research institutes, owners of cement / concrete frameworks, transporters, trading companies, agents, wholesalers / cooperatives, etc. If there are two or more owners, the owner recorded as ownership data can be recorded as a co-owner.

[0024] [Other Embodiments] In the above description, non-energy-origin CO ２ The focus is on reducing CO emissions from energy sources. ２ Although there is no specific mention of emissions, the resource circulation system 1 for cement and concrete materials is ２ The resource circulation system 1 for cement and concrete materials can be configured to include data on CO emissions from energy sources. ２ The system includes data on non-energy-related CO emissions. ２ Emissions and CO2 from energy sources ２ Total CO emissions ２ Determine the total CO emissions ２This can contribute to reducing emissions.

[0025] Specifically, at least one node 10 constituting the network 100 uses limestone-derived Ca, which is made from limestone as a raw material, and CO ２ Data on emissions is added to limestone-derived calcium amount data 12. Energy-derived CO when using limestone-derived Ca from limestone ２ The data on emissions include the CO emitted during the production of limestone-derived Ca. ２ Emissions (first energy-derived CO ２ The data on CO emissions from the production of cement and concrete materials using limestone-derived Ca. ２ Emissions (secondary energy-derived CO ２ and data on CO emissions from the first energy source. ２ The amount of CO emitted during the process of obtaining limestone-derived Ca, such as raw material procurement, manufacturing, logistics, and sales, is ２ The total amount of CO2 emitted from energy sources ２ The amount of CO emitted from limestone-derived calcium during the process of turning it into cement and concrete materials, for example, through fuel combustion, electricity use, etc. ２ This is the total amount of emissions.

[0026] In addition, at least one node 20 constituting the network 100 uses already decarbonated Ca derived from waste or by-products as raw materials, and the CO ２ Data on the amount of emitted calcium is added to the waste-derived calcium amount data 22. CO2 derived from energy when using already decarbonated Ca derived from waste etc. using waste and by-products as raw materials ２ The data on emissions include the CO emitted up to the time of producing decarbonated Ca derived from waste, etc. ２ Emissions (third energy-derived CO ２ data on CO emissions) and the CO emissions during the production of cement and concrete materials using decarbonated Ca derived from waste, etc. ２Emissions (fourth energy-derived CO ２ and data on CO2 emissions from third energy sources. ２ The amount of CO emitted during the process of obtaining decarbonated Ca derived from waste materials and by-products from raw material procurement, manufacturing, logistics, sales, etc. ２ The fourth energy-derived CO2 emissions ２ The amount of CO emitted is, for example, the amount of CO emitted from the process of turning decarbonated Ca derived from waste and by-products into cement and concrete materials through fuel combustion, electricity use, etc. ２ This is the total amount of emissions.

[0027] According to the resource circulation system 1 for cement / concrete-based materials according to another embodiment, the limestone-derived calcium amount data 12 includes the amount of CO2 derived from energy when using limestone-derived Ca, which is made from limestone as a raw material. ２ Data on emissions is added, and the amount of calcium derived from waste, etc. data 22 includes the amount of CO2 derived from energy when using Ca derived from waste, etc. that has already been decarbonated and is derived from waste, etc. that uses waste and by-products as raw materials. ２ By adding data on emissions, CO2 from energy sources ２ Total CO emissions ２ This will create a resource circulation system for cement and concrete materials that allows emissions to be tracked.

[0028] In the resource circulation of the cement field, the present invention manages data on the amount of calcium derived from limestone in the resources of circulating cement and concrete materials and data on the amount of calcium that has already been decarbonated derived from waste, etc., on a network, thereby reducing non-energy-derived CO2 in the movement of cement (from production to disposal). ２ By understanding emissions, non-energy-related CO ２ It is now possible to grasp CO emissions. ２ Furthermore, the present invention can reduce CO emissions from non-energy sources in the resource circulation of the cement industry. ２ Emissions and CO2 from energy sources ２ Total CO emissions ２Determine the total CO emissions ２ This can contribute to reducing emissions.

[0029] 1 Resource circulation system for cement and concrete materials 10, 20, 30, 40, 50, 60 Node 11, 21, 31, 41, 51, 61 Storage unit 12 Limestone-derived calcium amount data 22 Waste-derived calcium amount data 32 Cement and concrete material data 100 Network

Claims

1. A resource circulation system for cement / concrete-based materials comprising nodes each forming a network and managing data relating to the production of cement / concrete-based materials, wherein at least one of the nodes calculates an amount of limestone-derived calcium made from limestone as a raw material among the calcium used in the production of the cement / concrete-based materials, generates calculated data on the amount of limestone-derived calcium, and records the limestone-derived calcium amount data in the network, at least one of the nodes calculates an amount of already decarbonated calcium derived from waste, etc., made from waste and by-products as raw materials, among the calcium used in the production of the cement / concrete-based materials, generates calculated data on the amount of calcium derived from waste, etc., and records the waste, etc.-derived calcium amount data in the network, and at least one of the nodes links the limestone-derived calcium amount data and the waste, etc.-derived calcium amount data to cement / concrete-based material data assigned to the produced cement / concrete-based material, and records the linked cement / concrete-based material data in the network.

2. A resource circulation system for cement / concrete-based materials according to claim 1, wherein at least one of said nodes keeps track of the movement of said produced cement / concrete-based materials and records tracking data in said network.

3. A resource circulation system for cement / concrete-based materials as described in claim 1, wherein at least one of the nodes identifies cement / concrete-based materials in which the ratio of limestone-derived calcium to the calcium used in the production is 98% or less.

4. A resource circulation system for cement / concrete-based materials as described in claim 1, wherein the cement / concrete-based material is at least one of cement, mortar, and concrete.

5. A resource circulation system for cement / concrete-based materials as described in claim 1, wherein the method for distinguishing between calcium derived from limestone and calcium derived from waste or the like is a comprehensive judgment based on the results of analysis including observation of particle shape by SEM, quantification of trace elements by XRF, and quantification of trace elements by ICP-OES.

6. The resource circulation system for cement / concrete-based materials according to claim 1, wherein the network is a blockchain network.

7. At least one of the nodes uses limestone-derived calcium derived from limestone. ２ Add data on the amount of calcium derived from limestone to the data on the amount of calcium derived from limestone, and at least one of the nodes uses already decarbonated calcium derived from waste, etc., using waste and by-products as raw materials. ２ 2. The resource circulation system for cement / concrete-based materials according to claim 1, wherein data on discharge amount is added to the data on the amount of calcium derived from the waste, etc.

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