Carbonation curing system for hydraulic curing bodies and method for managing the carbonation curing of hydraulic curing bodies

Abstract

The present invention provides a carbonation curing system for hydraulic hardened bodies and a carbonation curing management method for hydraulic hardened bodies, which can efficiently use CO2 in a carbonation curing tank for carbonation curing of hydraulic hardened bodies. [Solution] The carbonation curing system for hydraulic hardened bodies comprises a carbonation curing tank that contains the hydraulic hardened body, a supply unit that supplies carbon dioxide-containing gas having a higher CO2 concentration than air into the carbonation curing tank, a discharge unit that discharges gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank, and a blower that is provided inside the carbonation curing tank and blows the CO2-containing gas onto the surface of the hydraulic hardened body.

Description

Technical Field

[0001] The present invention relates to a carbonation curing system for a hydraulic hardening body and a method for managing carbonation curing of a hydraulic hardening body.

Background Art

[0002] In recent years, for the realization of a carbon-neutral society, the technology of CO2 immobilization in concrete has attracted great attention. In the technology of CO2 immobilization in concrete, by increasing the CO2 concentration in the tank, carbonation curing is carried out during the hardening process of the concrete stationary in the tank, and CO2 is absorbed and fixed in the concrete.

[0003] For example, Patent Document 1 describes a curing system for producing a concrete-based final product and curing a material that is not fully cured without the presence of CO2. In the curing system of Patent Document 1, the bonding element has a core containing a predetermined element, a first layer at least partially covering the core and containing a predetermined element, and a second layer at least partially covering the first layer and containing a predetermined element. Further, carbon dioxide gas is supplied from a carbon dioxide source to a curing chamber through a gas inflow port, and during curing, the concentration of carbon dioxide gas in the curing chamber, the temperature of the carbon dioxide gas, the humidity of the carbon dioxide gas, the supply amount of the carbon dioxide gas to the curing chamber, and the circulation of the carbon dioxide gas existing in the curing chamber are controlled.

[0004] However, in a conventional carbonation curing system such as that of Patent Document 1, not all of the CO2 already present in the curing chamber before the supply of CO2 and the CO2 supplied to the curing chamber is used for carbonation curing, and the CO2 not used for carbonation curing leaks from the curing chamber. Thus, the CO2 in the curing chamber is not fully used for carbonation curing and is wasted and released from the curing chamber. Therefore, it is required to increase the amount of CO2 used for carbonation curing in the curing chamber and reduce the amount of CO2 leaking from the curing chamber.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Patent No. 6598818 [Overview of the project] [Problems that the invention aims to solve]

[0006] The object of the present invention is to provide a carbonate curing system for hydraulic curing materials and a method for managing the carbonate curing of hydraulic curing materials, which allows for the efficient use of CO2 in a carbonate curing tank for the carbonate curing of hydraulic curing materials. [Means for solving the problem]

[0007] [1] A carbonation curing system for a hydraulic curing body, comprising: a carbonation curing tank for containing a hydraulic curing body; a supply unit for supplying a carbon dioxide-containing gas with a CO2 concentration higher than that of air into the carbonation curing tank; a discharge unit for discharging a gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank; and a blower provided inside the carbonation curing tank for blowing a gas containing CO2 onto the surface of the hydraulic curing body. [2] The carbonation curing system for a hydraulic hardened body according to [1] above, wherein the blower continuously applies the gas containing CO2 to the surface of the hydraulic hardened body at a flow rate of 0.05 m / s or more and 5.00 m / s or less. [3] The carbonate curing system for a hydraulic hardening body according to [1] or [2], further comprising at least one occupant provided above the hydraulic hardening body inside the carbonate curing tank and forming a closed space. [4] A carbonation curing system for a hydraulic curing body according to any one of [1] to [3] above, further comprising a dehumidifier installed inside the carbonation curing tank, which dehumidifies the gas inside the carbonation curing tank, and when the temperature inside the carbonation curing tank is below a predetermined level, supplies the heat generated by the dehumidification of the gas inside the carbonation curing tank to the inside of the carbonation curing tank, and when the temperature inside the carbonation curing tank is above a predetermined level, discharges the heat generated by the dehumidification of the gas inside the carbonation curing tank to the outside of the carbonation curing tank. [5] A carbonate curing system for a hydraulic curing body according to any one of [1] to [4] above, further comprising a heater provided inside the carbonate curing tank for heating the gas inside the carbonate curing tank when the temperature inside the carbonate curing tank is below a predetermined level. [6] A carbonate curing system for a hydraulic curing body according to any one of [1] to [5] above, further comprising a cooler provided inside the carbonate curing tank for cooling the gas inside the carbonate curing tank when the temperature inside the carbonate curing tank is higher than a predetermined level. [7] The carbonate curing system for a hydraulic hardening body according to any one of [1] to [6] above, further comprising a wind speed sensor provided on the surface of the hydraulic hardening body for measuring the flow velocity of gas on the surface of the hydraulic hardening body. [8] The carbonate curing system for a hydraulic hardening body according to any one of [1] to [7] above, further comprising a composite sensor provided on the surface of the hydraulic hardening body for measuring at least one of the temperature, humidity, CO2 concentration and condensation on the surface of the hydraulic hardening body. [9] The carbonate curing system for a hydraulic curing body according to any one of [1] to [8] above, comprising a plurality of carbonate curing tanks, the carbonate curing tanks being connected to one another, and supplying a gas containing at least carbon dioxide discharged to the outside of one carbonate curing tank into the inside of a separate carbonate curing tank.

[10] A carbonation curing system for a hydraulic curing body according to any one of [1] to [9] above, further comprising a carbon dioxide delayed discharge mechanism that discharges a gas containing at least air and carbon dioxide from inside the carbonation curing tank to outside the carbonation curing tank via the discharge section, and preferentially discharges air to outside the carbonation curing tank over carbon dioxide.

[11] The supply unit is provided at the lower part of the side wall of the carbonation curing tank, and is a carbonation curing system for a hydraulic hardened body according to any one of [1] to

[10] above.

[12] The carbonation curing system for a hydraulic curing body according to

[10] or

[11] , wherein the discharge section is provided at the top of the carbonation curing tank, and the carbon dioxide delayed discharge mechanism comprises a carbon dioxide delay section that circulates the gas from the top of the carbonation curing tank to the bottom of the carbonation curing tank, and supplies the gas that has circulated to the top of the carbonation curing tank with a flow path cross-sectional area S2 smaller than the flow path cross-sectional area S1 when it has circulated to the bottom, to the discharge section.

[13] The carbon dioxide delay section comprises an inner cylinder whose upper end is connected to the discharge section and extends downward, with an open lower end, and an outer cylinder whose lower end is closed and extends upward, with an open upper end, covering the outer circumference of the inner cylinder from the outside, as described in

[12] above.

[14] A method for controlling the carbonation curing of a hydraulic hardened body, comprising: a filling step of filling the inside of a carbonation curing tank containing a hydraulic hardened body with a carbon dioxide-containing gas having a CO2 concentration higher than that of air; a curing step of carbonizing the hydraulic hardened body with the carbon dioxide gas filled inside the carbonation curing tank in the filling step; and a discharge step of discharging a gas containing at least carbon dioxide from inside the carbonation curing tank to the outside of the carbonation curing tank after the curing step, wherein in the curing step, the gas containing CO2 is applied to the surface of the hydraulic hardened body to carbonize and cure the hydraulic hardened body.

[15] The method for controlling the carbonation of a hydraulic hardened body according to

[14] above, wherein in the curing step, the gas containing CO2 is continuously applied to the surface of the hydraulic hardened body at a flow rate of 0.05 m / s or more and 5.00 m / s or less to carbonate the hydraulic hardened body.

[16] The method for managing the carbonation curing of a hydraulic curing body according to

[14] or

[15] above, comprising a plurality of carbonation curing tanks, wherein the carbonation curing tanks are connected to one another, and a gas containing at least carbon dioxide discharged to the outside of a carbonation curing tank is supplied to the inside of a separate carbonation curing tank. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a carbonate curing system for hydraulic curing materials and a method for managing the carbonate curing of hydraulic curing materials, which allows for the efficient use of CO2 in a carbonate curing tank for the carbonate curing of hydraulic curing materials. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic diagram showing an example of a carbonation curing system for a hydraulically hardened body according to an embodiment. [Figure 2] Figure 2 is a schematic diagram showing another example of a carbonate curing system for a hydraulically hardened body according to the embodiment. [Modes for carrying out the invention]

[0010] The following will provide a detailed explanation based on the embodiments.

[0011] As a result of diligent research, the inventors discovered that by applying a CO2-containing gas to the hydraulic curing body placed in the carbonation curing tank, the CO2 in the tank can be efficiently used for the carbonation curing of the hydraulic curing body. Based on this finding, the inventors completed the present invention.

[0012] The present invention provides a carbonation curing system for hydraulic curing bodies, comprising: a carbonation curing tank for containing the hydraulic curing body; a supply unit for supplying a carbon dioxide-containing gas with a CO2 concentration higher than that of air into the carbonation curing tank; a discharge unit for discharging a gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank; and a blower provided inside the carbonation curing tank for blowing the CO2-containing gas onto the surface of the hydraulic curing body.

[0013] The carbonation curing management method of the hydraulic hardened body of the present invention includes a filling step of filling a carbonation curing tank containing the hydraulic hardened body with a carbon dioxide-containing gas having a higher CO2 concentration than air, a curing step of carbonation-curing the hydraulic hardened body with the carbon dioxide gas filled inside the carbonation curing tank in the filling step, and a discharging step of discharging a gas containing at least carbon dioxide gas from the inside of the carbonation curing tank to the outside of the carbonation curing tank after the curing step. In the curing step, a gas containing CO2 is applied to the surface of the hydraulic hardened body to carbonation-cure the hydraulic hardened body.

[0014] FIG. 1 is a schematic diagram showing an example of a carbonation curing system for a hydraulic hardened body according to an embodiment. As shown in FIG. 1, a carbonation curing system 1 for a hydraulic hardened body (hereinafter, also simply referred to as a carbonation curing system) includes a carbonation curing tank 2, a supply unit 3, a discharge unit 41, and a blower 6.

[0015] Inside the carbonation curing tank 2 constituting the carbonation curing system 1, a hydraulic hardened body H that undergoes carbonation curing to absorb and fix CO2 (hereinafter, absorption and fixation are also collectively referred to as fixation) is accommodated. The hydraulic hardened body H is an object of carbonation curing. For example, the hydraulic hardened body H is installed on a support 5 such as a square bar. Further, the carbonation curing tank 2 is, for example, a container for transportation.

[0016] The hydraulic hardened body H contains cement and hardens by reacting with water, and examples thereof include concrete and mortar. By performing carbonation curing in which the hydraulic hardened body H reacts with carbon dioxide gas during the hardening process, CO2 is fixed to the hydraulic hardened body H.

[0017] The supply unit 3 supplies a carbon dioxide-containing gas from the outside of the carbonation curing tank 2 to the inside of the carbonation curing tank 2 through a supply opening 2a provided on the side wall of the carbonation curing tank 2. The carbon dioxide-containing gas is a gas containing carbon dioxide gas, and preferably consists only of carbon dioxide gas. The CO2 concentration in the carbon dioxide-containing gas is higher than the CO2 concentration in the air.

[0018] The supply unit 3 is provided with a supply valve 3a and is connected to a CO2 supply facility 3b. The CO2 supply facility 3b supplies a carbon dioxide-containing gas to the supply unit 3. Further, if necessary, the CO2 concentration, temperature, CO2 supply rate, etc. of the carbon dioxide-containing gas supplied from the CO2 supply facility 3b to the supply unit 3 may be adjusted by an adjustment unit (not shown).

[0019] The carbon dioxide-containing gas supplied from the CO2 supply facility 3b to the supply unit 3 is supplied from the supply unit 3 into the carbonation curing tank 2. The supply stop and supply start (resumption of supply) of the carbon dioxide-containing gas into the carbonation curing tank 2, and the adjustment of the supply amount of the carbon dioxide-containing gas supplied into the carbonation curing tank 2 are controlled by the supply valve 3a of the supply unit 3.

[0020] When filling the carbonation curing tank 2 with the carbon dioxide-containing gas, from the viewpoint of reducing the amount of CO2 leaked from the carbonation curing tank 2 without being used for the carbonation curing of the hydraulic hardening body H and efficiently using the carbon dioxide in the carbon dioxide-containing gas supplied from the supply unit 3 for the carbonation curing of the hydraulic hardening body H, the supply unit 3 is preferably provided at the lower part of the side wall of the carbonation curing tank 2, and more preferably provided at the lower part of the side wall of the carbonation curing tank 2 facing the carbon dioxide delay discharge mechanism 4 described later.

[0021] The discharge part 41 discharges the gas containing at least carbon dioxide from the inside of the carbonation curing tank 2 to the outside of the carbonation curing tank 2.

[0022] The blower 6 is provided inside the carbonation curing tank 2. The blower 6 stirs the gas in the carbonation curing tank 2 and is different from the air conditioning equipment 8 that adjusts the temperature and humidity in the carbonation curing tank 2. For example, the blower 6 is provided at a position facing the supply unit 3 and blows air in a direction away from the carbon dioxide delay discharge mechanism 4 described later.

[0023] The blower 6 inside the carbonation curing tank 2 applies the gas containing CO2 to the surface of the hydraulic hardening body H during the carbonation curing of the hydraulic hardening body H. Thus, the CO2 in the carbonation curing tank 2 can be efficiently used for the carbonation curing of the hydraulic hardening body H.

[0024] Furthermore, when the blower 6 continuously blows a CO2-containing gas onto the surface of the hydraulic hardened body H at a flow rate of 0.05 m / s or more, condensation is less likely to occur on the surface of the hydraulic hardened body H, and the carbonation depth of the hydraulic hardened body H can be easily controlled to a predetermined extent. Moreover, drying shrinkage in the early stages of the age of the hydraulic hardened body H can be suppressed. In addition, if the flow rate is preferably 5.00 m / s or less, and more preferably 1.00 m / s or less, shrinkage due to excessive drying of the hydraulic hardened body H and fine cracks that occur in the hydraulic hardened body H can be suppressed. The flow rate of the gas blown from the blower 6 onto the surface of the hydraulic hardened body H can be measured by a wind speed sensor 71 provided on the upper surface of the hydraulic hardened body H, as shown in Figure 1.

[0025] Furthermore, it is preferable that the carbonation curing system 1 is further equipped with an air conditioning system 8. The airflow continuously applied to the surface of the hydraulic curing body H by the blower 6 is preferably the airflow generated by the blower 6, as well as the air supply duct 81 and intake port 8a of the air conditioning system 8 installed in the carbonation curing tank 2. The airflow generated by the blower 6 and the air conditioning system 8 flows in one direction within the carbonation curing tank 2 (flowing from left to right in Figure 1) and continuously hits the surface of the hydraulic curing body H.

[0026] The intake port 8a of the air conditioning equipment 8 is located on the side opposite the blower 6 in the carbonation curing tank 2. The air supply port of the air supply duct 81 is located around the blower 6 and faces the blower 6. The hydraulic hardening body H is installed between the air supply port of the air supply duct 81 and the intake port 8a of the air conditioning equipment 8, which are positioned opposite each other. In this way, the air supply duct 81 and the intake port 8a of the air conditioning equipment 8 are positioned separately.

[0027] The CO2-containing gas, whose temperature and humidity have been adjusted by the operating air conditioning system 8, is released from the air supply port of the air supply duct 81 located at the top of the carbonation curing tank 2 toward the blower 6. The blower 6 blows the temperature and humidity-adjusted gas toward the intake port 8a of the air conditioning system 8, which is installed beyond the hydraulic curing body H. As the temperature and humidity-adjusted gas flows toward the intake port 8a of the air conditioning system 8, it comes into contact with the hydraulic curing body H, thereby promoting and accelerating the carbonation curing of the hydraulic curing body H, and generating water vapor from the hydraulic curing body H.

[0028] After contact with the hydraulic hardened body H, the gas experiences a decrease in CO2 concentration and an increase in humidity. This gas, with its decreased CO2 concentration and increased humidity, is drawn into the intake port 8a of the air conditioning unit 8 along with a gas that satisfies at least one of the following conditions: a higher CO2 concentration and lower humidity. Furthermore, when carbon dioxide-containing gas is supplied from the supply unit 3 into the carbonation curing tank 2, air with a higher CO2 concentration than the gas with decreased CO2 concentration and increased humidity is also drawn into the intake port 8a of the air conditioning unit 8. The air drawn in from the intake port 8a is sent to the air conditioning unit 8, which adjusts the temperature and humidity and mixes gases with different CO2 concentrations. The gas, whose temperature and humidity have been adjusted and whose CO2 concentration has been maintained by the air conditioning unit 8, is then released again from the air outlet of the air supply duct 81 towards the blower 6.

[0029] In this way, by continuously and forcibly bringing a gas with controlled temperature and humidity and maintained CO2 concentration into contact with the surface of the hydraulic curing body H, the generation of airflow turbulence, stagnant gas, and localized airflow loops caused by the arrangement of the hydraulic curing body H can be suppressed. Therefore, the CO2 in the carbonation curing tank 2 can be efficiently used to efficiently perform carbonation curing of the hydraulic curing body H with minimal unevenness. Furthermore, since the air supply port of the air supply duct 81 and the intake port 8a of the air conditioning equipment 8 are arranged opposite each other, the water vapor generated from the hydraulic curing body H by carbonation curing can be efficiently taken into the air conditioning equipment 8 from the intake port 8a located downstream. As a result, the dehumidification efficiency in the carbonation curing tank 2 is improved.

[0030] In this way, the air conditioning system 8 adjusts the temperature, humidity, and CO2 concentration; the blower 6 blows the gas adjusted in temperature, humidity, and CO2 concentration by the air conditioning system 8 onto the hydraulic curing body H; the hydraulic curing body H undergoes carbonation curing with the gas adjusted in temperature, humidity, and CO2 concentration; the blower 6 blows the gas after carbonation curing back to the air conditioning system 8; and the air conditioning system 8 adjusts the temperature, humidity, and CO2 concentration of the gas blown by the blower 6. This cycle can be carried out continuously and forcibly.

[0031] Furthermore, it is preferable that the carbonation curing system 1 is further equipped with a wind speed sensor 71. The wind speed sensor 71 is provided on the surface of the hydraulic curing body H (the upper surface shown in Figure 1) and measures the flow velocity of the gas on the surface of the hydraulic curing body H.

[0032] By placing the wind speed sensor 71 on the surface of the hydraulic curing body H, the flow velocity of the gas continuously applied to the surface (top surface) of the hydraulic curing body H can be measured in real time. This allows for more accurate control of the gas flow velocity within the specified range by the blower 6, and in some cases by the blower 6 and the air conditioning equipment 8. As a result, the CO2 in the carbonation curing tank can be used more efficiently for the carbonation curing of the hydraulic curing body H.

[0033] Furthermore, it is preferable that the carbonation curing system 1 further includes a composite sensor 72. The composite sensor 72 is provided on the surface of the hydraulic curing body H (the upper surface shown in Figure 1) and measures at least one of the following on the surface of the hydraulic curing body H: temperature, humidity, CO2 concentration, and condensation. Preferably, the composite sensor 72 measures all of the following on the surface of the hydraulic curing body H: temperature, humidity, CO2 concentration, and condensation.

[0034] By placing the combined sensor 72 on the surface of the hydraulic curing body H, the surface condition of the hydraulic curing body H can be measured in real time. This allows the gas continuously applied to the surface (top surface) of the hydraulic curing body H to be conditioned by the air conditioning equipment 8, and in some cases by the blower 6 and the air conditioning equipment 8, thereby optimizing the carbonation curing environment of the hydraulic curing body H. As a result, the CO2 in the carbonation curing tank can be used more efficiently for the carbonation curing of the hydraulic curing body H.

[0035] If the carbonation curing system 1 is equipped with a wind speed sensor 71 and a combined sensor 72, the CO2 in the carbonation curing tank can be used more efficiently for the carbonation curing of the hydraulic curing body H.

[0036] Furthermore, it is preferable that the carbonation curing system 1 further includes a dehumidifier installed inside the carbonation curing tank 2. The dehumidifier dehumidifies the gas inside the carbonation curing tank 2. Figure 1 shows a configuration in which the dehumidifier is incorporated into the air conditioning equipment 8, but the dehumidifier may be configured separately from the air conditioning equipment 8.

[0037] When the temperature inside the carbonation curing tank 2 is below a predetermined level, the dehumidifier inside the carbonation curing tank 2 supplies heat generated by dehumidifying the gas inside the carbonation curing tank 2 to the inside of the carbonation curing tank 2. The heat generated by dehumidification is released from the air supply duct 81 toward the blower 6, passes through the hydraulic hardening body H by the blower 6, and then flows to the intake port 8a of the air conditioning equipment 8, where it is used to raise or maintain the temperature inside the carbonation curing tank 2. In this way, the heat generated inside the carbonation curing tank 2 is used for temperature control inside the carbonation curing tank 2 without being discharged outside the carbonation curing tank 2, thus improving the heating efficiency inside the carbonation curing tank 2.

[0038] Furthermore, when the temperature inside the carbonation curing tank 2 is higher than a predetermined level, the dehumidifier inside the carbonation curing tank 2 discharges the heat generated by the dehumidification of the gas inside the carbonation curing tank 2 to the outside of the carbonation curing tank 2. The heat generated by dehumidification is connected to the air conditioning equipment 8 and discharged outside the carbonation curing tank 2 from an outdoor unit (not shown) installed outside the carbonation curing tank 2. In this way, the heat generated inside the carbonation curing tank 2 is not used to raise or maintain the temperature inside the carbonation curing tank 2, but is discharged to the outside of the carbonation curing tank 2, thereby improving the cooling efficiency inside the carbonation curing tank 2.

[0039] The temperature inside the carbonation curing tank 2 changes in response to changes in the installation environment of the carbonation curing tank 2, such as the season and weather. Furthermore, the optimal temperature for promoting carbonation is generally determined to be within the range of ambient temperature (room temperature) to 55°C, depending on the type of hydraulic curing material, and this temperature range is set as the predetermined temperature. As described above, when the temperature inside the carbonation curing tank 2 is below the predetermined temperature, the heat is supplied to the inside of the carbonation curing tank 2, and when the temperature inside the carbonation curing tank 2 is above the predetermined temperature, the heat is discharged to the outside of the carbonation curing tank 2, thereby maintaining the temperature inside the carbonation curing tank 2 at the predetermined temperature, and thus efficiently promoting the carbonation curing of the hydraulic curing material H.

[0040] In this way, depending on the temperature inside the carbonation curing tank 2, the heat generated by the dehumidification of the gas can be retained inside the carbonation curing tank 2 or released to the outside of the carbonation curing tank 2, thereby effectively utilizing the heat for temperature control inside the carbonation curing tank 2.

[0041] Furthermore, it is preferable that the carbonation curing system 1 further includes a heater installed inside the carbonation curing tank 2. Figure 1 shows a configuration in which the heater is incorporated into the air conditioning equipment 8, but the heater may be configured separately from the air conditioning equipment 8.

[0042] When the temperature inside the carbonation curing tank 2 is below a predetermined level, the heater inside the carbonation curing tank 2 heats the gas inside the tank. The heated gas is released from the air supply duct 81 toward the blower 6, passes through the hydraulic curing body H by the blower 6, and then flows to the intake port 8a of the air conditioning equipment 8, where it is used to raise or maintain the temperature inside the carbonation curing tank 2. In this way, the temperature inside the carbonation curing tank 2 can be maintained at a predetermined level, thus efficiently promoting the carbonation curing of the hydraulic curing body H. Furthermore, since the gas heated by the heater inside the carbonation curing tank 2 is used for temperature control inside the carbonation curing tank 2 without being discharged outside the tank, heat loss can be avoided.

[0043] Furthermore, it is preferable that the carbonation curing system 1 further includes a cooling unit installed inside the carbonation curing tank 2. Figure 1 shows a configuration in which the cooling unit is incorporated into the air conditioning equipment 8, but the cooling unit may be configured separately from the air conditioning equipment 8.

[0044] When the temperature inside the carbonation curing tank 2 is higher than a predetermined level, the cooler inside the carbonation curing tank 2 cools the gas inside the tank. The cooled gas is released from the air supply duct 81 towards the blower 6, passes through the hydraulic curing body H by the blower 6, and then flows to the intake port 8a of the air conditioning equipment 8, where it is used to lower or maintain the temperature inside the carbonation curing tank 2. In this way, the temperature inside the carbonation curing tank 2 can be maintained at a predetermined level, thereby efficiently promoting the carbonation curing of the hydraulic curing body H. Furthermore, the heat generated by the cooler inside the carbonation curing tank 2 is discharged outside the carbonation curing tank 2 from an outdoor unit (not shown), thereby improving the cooling efficiency inside the carbonation curing tank 2.

[0045] Furthermore, it is preferable that the carbonation curing system 1 further includes at least one occupant 51 provided above the hydraulic hardened body H inside the carbonation curing tank 2. Figure 1 shows a configuration in which the carbonation curing system 1 has one occupant 51, but the carbonation curing system 1 may also have a configuration that includes multiple occupants 51.

[0046] The occupying body 51 is a component that forms a closed space and occupies the surplus space above the hydraulic curing body H in the internal space of the carbonation curing tank 2 that is not related to the carbonation curing of the hydraulic curing body H (hereinafter also simply referred to as the surplus space of the carbonation curing tank). Furthermore, the occupying body 51 is provided without contact with the hydraulic curing body H and does not hinder the carbonation curing of the hydraulic curing body H. For example, the occupying body 51 is larger than the hydraulic curing body H.

[0047] The occupant 51 preferably has a lower carbon dioxide permeability than air, and more preferably does not permeate carbon dioxide at all. In addition to this permeability, the occupant 51 preferably has high thermal insulation properties and is lightweight. The properties that the occupant 51 should possess can be appropriately selected according to the configuration of the carbonation curing system 1. Furthermore, if the carbonation curing system 1 includes multiple occupant 51s, all of the occupant 51s may have the same properties and shapes, all of the occupant 51s may have different properties and shapes, or some of the occupant 51s may have the same properties and shapes.

[0048] Preferred examples of the occupant 51 include hollow components such as airbags, air mattresses, and balloons, and solid components such as polystyrene foam.

[0049] By installing the occupant 51 in the surplus space of the carbonation curing tank 2, the volume of the internal space of the carbonation curing tank 2 can be reduced. Therefore, the amount of carbon dioxide-containing gas supplied to the carbonation curing tank 2, i.e., the amount of CO2 used, can be reduced, and the CO2 concentration inside the carbonation curing tank 2 can be raised to a predetermined value or higher in a short time. Furthermore, if the occupant 51 is in contact with the hydraulic curing body H, the contact area between the hydraulic curing body H and carbon dioxide gas decreases, and the carbonation curing of the hydraulic curing body H is inhibited. Therefore, the occupant 51 is kept in a non-contact state with the hydraulic curing body H.

[0050] From the viewpoint of further improving the above-mentioned effects of the occupant 51, it is preferable that the occupant 51 be provided in the surplus space between the hydraulic hardened body H and the upper part of the carbonation curing tank 2, as shown in Figure 1. For example, an air spacer 52, which is a breathable member such as a box made of wire mesh or a reinforcing cage, is installed on the upper surface of the uppermost hydraulic hardened body H, and the occupant 51 is supported from below by the air spacer 52. The carbon dioxide gas in the gas flowing inside the air spacer 52 can be used for the carbonation curing of the upper surface of the uppermost hydraulic hardened body H that supports the air spacer 52 from below.

[0051] Furthermore, it is preferable that the carbonation curing system 1 includes a filling process in which carbon dioxide-containing gas is supplied to the inside of the carbonation curing tank 2 and filled, a curing process in which the hydraulic curing body H is carbonized and cured with the carbon dioxide gas filled inside the carbonation curing tank 2, and a discharge process in which a gas containing at least carbon dioxide is discharged to the outside of the carbonation curing tank 2 after the curing of the hydraulic curing body H. The filling process, curing process, and discharge process in the carbonation curing system 1 correspond to the filling process S10, curing process S20, and discharge process S30, respectively, in the carbonation curing management method for hydraulic curing bodies of the embodiment described later.

[0052] Furthermore, it is preferable that the carbonation curing system 1 further includes a carbon dioxide delayed discharge mechanism 4. The carbon dioxide delayed discharge mechanism 4 discharges at least air and a gas containing carbon dioxide (hereinafter also simply referred to as gas) from inside the carbonation curing tank 2 to the outside of the carbonation curing tank 2 via the discharge section 41, and preferentially discharges air to the outside of the carbonation curing tank 2 rather than carbon dioxide. The air contained in the gas discharged to the outside of the carbonation curing tank 2 is the air that was already present inside the carbonation curing tank 2 before the supply section 3 supplied the carbon dioxide-containing gas, and if the carbon dioxide-containing gas supplied from the supply section 3 contains air, it also includes the air in the carbon dioxide-containing gas supplied from the supply section 3.

[0053] The carbon dioxide delayed discharge mechanism 4 utilizes the difference in weight between air and carbon dioxide to preferentially discharge air over carbon dioxide to the outside of the carbonation curing tank 2. In other words, the carbon dioxide delayed discharge mechanism 4 delays the discharge of carbon dioxide compared to air. Furthermore, if the carbon dioxide-containing gas supplied from the supply unit 3 contains substances other than carbon dioxide and air, these other substances are also discharged from the carbon dioxide delayed discharge mechanism 4 to the outside of the carbonation curing tank 2.

[0054] Such a carbon dioxide delayed emission mechanism 4 comprises an emission section 41 and a carbon dioxide delay section 42.

[0055] The discharge section 41, which constitutes the carbon dioxide delayed discharge mechanism 4, discharges a gas containing at least air and carbon dioxide from inside the carbon dioxide curing tank 2 to the outside of the carbon dioxide curing tank 2 through a discharge opening 2b provided in the side wall of the carbon dioxide curing tank 2. The discharge section 41 is provided in the upper part of the side wall of the carbon dioxide curing tank 2.

[0056] An overflow valve 41a is provided in the discharge section 41. The stopping and starting (restarting) of gas discharge to the outside of the carbonation curing tank 2, as well as the adjustment of the amount of gas discharged to the outside of the carbonation curing tank 2, are controlled by the overflow valve 41a of the carbon dioxide delayed discharge mechanism 4.

[0057] The carbon dioxide delay section 42, which constitutes the carbon dioxide delayed discharge mechanism 4, circulates the gas from the top to the bottom of the carbonation curing tank 2, and supplies the gas that has circulated to the top of the carbonation curing tank 2 with a flow path cross-sectional area S2 that is smaller than the flow path cross-sectional area S1 when the gas circulates to the bottom of the carbonation curing tank 2, to the discharge section 41. In the carbon dioxide delay section 42, the flow path cross-sectional area S2 when the gas circulates from the bottom to the top of the carbonation curing tank 2 is smaller than the flow path cross-sectional area S1 when the gas circulates from the top to the bottom of the carbonation curing tank 2.

[0058] In this way, the carbon dioxide delay unit 42 utilizes the difference between the flow path cross-sectional areas S1 and S2 to circulate the gas present in the upper part of the carbonation curing tank 2 downwards through the flow path cross-sectional area S1, and the gas that has circulated downwards in the carbonation curing tank 2 upwards through the flow path cross-sectional area S2, which is smaller than the flow path cross-sectional area S1. This allows air to be supplied to the discharge unit 41 preferentially over carbon dioxide. Thus, the carbon dioxide delay discharge mechanism 4 can preferentially discharge air to the outside of the carbonation curing tank 2 via the discharge unit 41, rather than carbon dioxide.

[0059] The carbon dioxide delay unit 42 having such a configuration preferably has an inner cylinder 42a and an outer cylinder 42b.

[0060] The inner cylinder 42a, which constitutes the carbon dioxide delay section 42, has its upper end connected to the discharge section 41, extends downward, and has an open lower end. The inner cylinder 42a extends to near the inner surface of the lower end of the outer cylinder 42b.

[0061] The outer cylinder 42b, which constitutes the carbon dioxide delay section 42, has a closed lower end and extends upward, covering the outer circumference of the inner cylinder 42a from the outside. In this way, the inner cylinder 42a and the outer cylinder 42b, which covers the entire circumference of the inner cylinder from the outside, have a double-cylinder structure.

[0062] The lower end of the inner cylinder 42a and the inner surface of the lower end of the outer cylinder 42b are not in contact and are non-contact. For example, the lower limit of the vertical distance d between the lower end of the inner cylinder 42a and the inner surface of the lower end of the outer cylinder 42b is preferably 20 mm or more, and the upper limit is preferably 150 mm or less. When the above distance d is 20 mm or more, even if condensation water is generated between the lower end of the inner cylinder 42a and the lower end of the outer cylinder 42b, the gas can flow smoothly. Also, when the above distance d is 150 mm or less, the airflow stabilization effect achieved by the length of the inner cylinder 42a and the outer cylinder 42b is good.

[0063] The lower end of the outer cylinder 42b may be connected to the bottom of the carbonation curing tank 2. If the lower end of the outer cylinder 42b is connected to the bottom of the carbonation curing tank 2, the lower end of the outer cylinder 42b may be open, and the bottom portion of the carbonation curing tank 2 connected to the lower end of the outer cylinder 42b also serves as the inner surface of the lower end of the outer cylinder 42b.

[0064] The outer cylinder 42b extends to a position below the upper end of the inner cylinder 42a. The upper end of the outer cylinder 42b is open.

[0065] A drain pipe 43 may be provided at the lower end of the outer cylinder 42b for discharging a small amount of water (including condensation) to the outside of the carbonation curing tank 2. A drain valve 43a is provided in the drain pipe 43.

[0066] The gas flows in from the upper end of the outer cylinder 42b, circulates downward through the outer cylinder 42b, then flows from the lower end of the outer cylinder 42b to the lower end of the inner cylinder 42a, circulates upward through the inner cylinder 42a, and then flows from the upper end of the inner cylinder 42a to the discharge section 41.

[0067] The flow path cross-sectional area S2 of the inner cylinder 42a, which allows gas to flow from bottom to top, is smaller than the flow path cross-sectional area S1 of the outer cylinder 42b, which allows gas to flow from top to bottom. This double-cylinder structure of the inner cylinder 42a and outer cylinder 42b allows air to be supplied preferentially to the discharge section 41 over carbon dioxide gas when considering the carbon dioxide gas and air contained in the gas in the carbonation curing tank 2.

[0068] From the viewpoint that the double-cylinder structure of the inner cylinder 42a and outer cylinder 42b provides even greater priority to supplying air to the discharge section 41 than carbon dioxide, it is preferable that the supply flow velocity of the carbon dioxide-containing gas supplied from the supply section 3 to the inside of the carbonation curing tank 2 (hereinafter also simply referred to as the supply flow velocity of the carbon dioxide-containing gas) > the flow velocity of the gas circulating upward in the inner cylinder 42a (hereinafter also simply referred to as the flow velocity in the inner cylinder 42a) > the flow velocity of the gas circulating downward in the outer cylinder 42b (hereinafter also simply referred to as the flow velocity in the outer cylinder 42b), the flow velocity in the inner cylinder 42a being 20% ​​or less of the supply flow velocity of the carbon dioxide-containing gas, and the flow velocity in the outer cylinder 42b being 5% or less of the supply flow velocity of the carbon dioxide-containing gas. On the other hand, while increasing the flow velocity difference improves the above effect, it also increases the size of the inner cylinder 42a and the outer cylinder 42b. Therefore, the flow velocity difference may be appropriately selected according to the constraints on the arrangement of the inner cylinder 42a and the outer cylinder 42b within the carbonation curing tank 2.

[0069] In the carbon dioxide-containing gas filling process, the carbon dioxide-containing gas is supplied from a supply unit 3 located below the carbon dioxide-containing tank 2 without stirring the gas inside the tank 2. This easily creates a condition where the CO2 concentration is high below the tank 2 and low above it. The gas present above the tank 2, i.e., the gas with the low CO2 concentration, then flows into the carbon dioxide delayed discharge mechanism 4, which actively discharges air rather than carbon dioxide from the tank 2.

[0070] In this way, by statically supplying (filling) carbon dioxide-containing gas within the carbonation curing tank 2 without stirring the gas inside, the difference in CO2 concentration between the upper and lower parts of the carbonation curing tank 2 is actively increased. As a result, the gas with a lower CO2 concentration at the top of the carbonation curing tank 2 flows into the carbon dioxide delayed discharge mechanism 4, which then actively discharges the air outside the carbonation curing tank 2. In this way, when filling the carbon dioxide-containing gas into the carbonation curing tank 2, the amount of CO2 that leaks out of the carbonation curing tank 2 without being used for the carbonation curing of the hydraulic curing body H is reduced, thereby reducing the amount of CO2 wasted from the carbonation curing tank 2 and allowing the CO2 inside the carbonation curing tank 2 to be efficiently used for the carbonation curing of the hydraulic curing body H.

[0071] Furthermore, as shown in Figure 1, the carbonation curing system 1 may further include an exhaust section 91 having an exhaust valve 91a and an intake section 93 having an intake valve 93a, which are provided in the carbonation curing tank 2, as well as an exhaust fan 92 provided in the exhaust section 91. For example, when it is desired to ventilate the carbonation curing tank 2 during the discharge process (discharge process S30 described later), the gas inside the carbonation curing tank 2 is discharged into the carbonation curing tank 2 by opening the exhaust valve 91a and operating the exhaust fan 92, while the intake valve 93a is opened to draw in air from outside the carbonation curing tank 2. Also, when multiple carbonation curing tanks 21 and 22 are connected as described later, the intake valve 93a, which is a two-way valve, is changed to an intake three-way valve 93b.

[0072] Figure 2 is a schematic diagram showing another example of the carbonation curing system for hydraulically hardened bodies according to the embodiment. In Figure 2, only the carbonation curing tanks 2 (21, 22), supply unit 3, discharge unit 41, and hydraulically hardened body H shown in Figure 1 are shown, and other components are omitted. Carbonation curing tanks 21 and 22 have the same configuration as carbonation curing tank 2 described above.

[0073] As shown in Figure 2, the carbonation curing system 1 comprises a plurality of carbonation curing tanks 21 and 22, and it is preferable that the exhaust section 91 of carbonation curing tank 21 is connected to the intake section 93 of carbonation curing tank 22, and the exhaust section 91 of carbonation curing tank 22 is connected to the intake section 93 of carbonation curing tank 21. If the CO2 concentration of the gas discharged during the discharge treatment of carbonation curing tank 21 is higher than that of air, the carbonation curing system 1 supplies gas containing at least carbon dioxide discharged from the exhaust section 91, which has an exhaust valve 91a and an exhaust fan 92, into the carbonation curing tank 22 from the intake section 93 of a carbonation curing tank 22 that is separate from the carbonation curing tank 21 from which the gas was discharged.

[0074] In the interconnected carbonation curing tanks 21 and 22, the carbon dioxide-containing gas, which is discharged from the exhaust section 91 of the carbonation curing tank 21 and has a higher CO2 concentration than air, is filled into the separate carbonation curing tank 22 from the intake section 93, which has an intake three-way valve 93b. This allows the CO2 exhausted from the carbonation curing tank 21 to be reused for the carbonation curing of the hydraulic curing body H contained in the separate carbonation curing tank 22. Therefore, the amount of CO2 leaking from the carbonation curing tank that is not used for the carbonation curing of the hydraulic curing body can be further reduced.

[0075] Furthermore, if the CO2 concentration of the gas discharged during the discharge treatment of the carbonation curing tank 22 is higher than that of air, the amount of CO2 leaking from the carbonation curing tank 21 without being used for the carbonation curing of the hydraulic curing body can be further reduced by filling the carbonation curing tank 21 with the carbon dioxide-containing gas discharged from the exhaust section 91 of the carbonation curing tank 22 through the intake three-way valve 93b of the intake section 93.

[0076] Furthermore, when the carbonation curing tanks 21 and 22 take in outside air, the intake three-way valve 93b is switched to the outside side. Also, when multiple carbonation curing tanks 21 and 22 are not connected, the intake three-way valve 93b is replaced with the intake valve 93a, which is a two-way valve.

[0077] Next, a method for managing the carbonation curing of a hydraulically hardened body according to the embodiment will be described.

[0078] The method for managing the carbonation curing of a hydraulic hardened body comprises a filling step S10, a curing step S20, and a discharge step S30, and is a method for executing the carbonation curing system for a hydraulic hardened body according to the above embodiment.

[0079] In the filling process S10, a carbon dioxide-containing gas with a higher CO2 concentration than air is filled into the carbonation curing tank 2 containing the hydraulic curing body H. In the curing process S20, which follows the filling process S10, the hydraulic curing body H is cured by carbonation using the carbon dioxide gas that was filled into the carbonation curing tank 2 in the filling process S10. In the discharge process S30, which follows the curing process S20, a gas containing at least carbon dioxide is discharged from the inside of the carbonation curing tank 2 to the outside of the carbonation curing tank 2. Then, in the curing process S20, the gas containing CO2 is applied to the surface of the hydraulic curing body H to cure it by carbonation. In this way, the CO2 in the carbonation curing tank 2 can be efficiently used for the carbonation curing of the hydraulic curing body H.

[0080] Furthermore, in the curing process S20, if a gas containing CO2 is continuously applied to the surface of the hydraulic hardened body H at a flow rate of 0.05 m / s or more, condensation is less likely to occur on the surface of the hydraulic hardened body H, and the carbonation depth of the hydraulic hardened body H can be easily controlled to a predetermined extent. Moreover, drying shrinkage of the hydraulic hardened body H in the early stages of age can be suppressed. In addition, if the above flow rate is preferably 5.00 m / s or less, and more preferably 1.00 m / s or less, shrinkage due to excessive drying of the hydraulic hardened body H and fine cracks that occur in the hydraulic hardened body H can be suppressed.

[0081] Furthermore, if the CO2 concentration of the gas discharged in the carbonation curing tank discharge process S30 is higher than that of air, as shown in Figure 2, the carbonation curing management method for the hydraulic curing body H preferably includes a plurality of interconnected carbonation curing tanks 21 and 22, and supplies the gas containing at least carbon dioxide discharged to the outside of carbonation curing tank 21 into a carbonation curing tank 22 separate from the carbonation curing tank 21 from which the gas was discharged. The separate carbonation curing tank 22 has the same configuration as the carbonation curing tank 21 described above and can perform the filling process S10, curing process S20, and discharge process S30.

[0082] By discharging the carbon dioxide-containing gas, which is a gas with a higher CO2 concentration than air and is discharged from the exhaust section 91 having an exhaust valve 91a and an exhaust fan 92 to the outside of the carbonation curing tank 21, and filling a separate carbonation curing tank 22 from the intake section 93 having an intake three-way valve 93b, the CO2 exhausted from the carbonation curing tank 21 can be reused for the carbonation curing of the hydraulic curing body H contained in the separate carbonation curing tank 22. Therefore, the amount of CO2 that leaks from the carbonation curing tank without being used for the carbonation curing of the hydraulic curing body can be further reduced.

[0083] Furthermore, if the CO2 concentration of the gas discharged from the carbonation curing tank 22 is higher than that of air, the amount of CO2 leaking from the carbonation curing tank 21 without being used for the carbonation curing of the hydraulic curing body can be further reduced by filling the carbonation curing tank 21 with the carbon dioxide-containing gas discharged from the exhaust section 91 of the carbonation curing tank 22 through the intake three-way valve 93b of the intake section 93.

[0084] According to the embodiments described above, by applying a gas containing CO2 to the hydraulic curing body provided in the carbonation curing tank, the CO2 in the carbonation curing tank can be efficiently used for the carbonation curing of the hydraulic curing body.

[0085] Although embodiments have been described above, the present invention is not limited to the embodiments described above, and includes all aspects included in the concepts and claims of this disclosure, and can be modified in various ways within the scope of this disclosure. [Explanation of symbols]

[0086] 1. Carbonation curing system for hydraulically hardened materials 2, 21, 22 Carbonation curing tanks 2a Supply opening 2b Ejection opening 3 Supply section 3a Supply valve 3b CO2 supply equipment 4. Delayed carbon dioxide emission mechanism 41 Discharge section 41a Overflow valve 42 Carbon dioxide delay section 42a Inner cylinder 42b Outer cylinder 43 Drain pipe 43a Drain valve 5 Support 51. Occupants 52 Air Spacers 6. Blower 71 Wind speed sensor 72 Combined Sensors 8 Air conditioning equipment 8a Air intake for air conditioning equipment 81 Air supply duct 91 Exhaust section 91a Exhaust valve 92 Exhaust fan 93 Intake section 93a Intake valve 93b Intake three-way valve H Hydraulic hardening body

Claims

1. A carbonation curing tank for containing a hydraulically hardened body, CO2 is stronger than air. ２ A supply unit that supplies a highly concentrated carbon dioxide-containing gas into the carbonation curing tank, A discharge unit that discharges a gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank, It is installed inside the carbonation curing tank, CO ２ A blower that blows a gas containing onto the surface of the hydraulic hardened body, A dehumidifier is provided inside the carbonation curing tank, which dehumidifies the gas inside the carbonation curing tank, and when the temperature inside the carbonation curing tank is below a predetermined level, supplies the heat generated by the dehumidification of the gas inside the carbonation curing tank to the inside of the carbonation curing tank, and when the temperature inside the carbonation curing tank is above a predetermined level, discharges the heat generated by the dehumidification of the gas inside the carbonation curing tank to the outside of the carbonation curing tank. A carbonate curing system for hydraulically hardened materials, equipped with the following features.

2. A carbonation curing tank for containing a hydraulically hardened body, A supply unit that supplies a carbon dioxide-containing gas with a CO2 concentration higher than that of air into the carbonation curing tank, A discharge unit that discharges a gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank, A blower is provided inside the carbonation curing tank to blow a gas containing CO2 onto the surface of the hydraulic hardened body. A carbonate curing system for hydraulically hardened bodies comprising: The carbonation curing system for the hydraulic curing body comprises a plurality of carbonation curing tanks, the carbonation curing tanks being connected to one another, and a gas containing at least carbon dioxide discharged from one carbonation curing tank being supplied to the inside of a separate carbonation curing tank.

3. A carbonation curing tank for containing a hydraulically hardened body, A supply unit that supplies a carbon dioxide-containing gas with a CO2 concentration higher than that of air into the carbonation curing tank, A discharge unit that discharges a gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank, A blower is provided inside the carbonation curing tank to blow a gas containing CO2 onto the surface of the hydraulically hardened body, A carbon dioxide delayed discharge mechanism discharges a gas containing at least air and carbon dioxide from inside the carbonation curing tank to the outside of the carbonation curing tank via the discharge section, and preferentially discharges air to the outside of the carbonation curing tank over carbon dioxide. Equipped with, The discharge section is provided at the top of the carbonation curing tank, A carbon dioxide delay discharge mechanism is provided with a carbon dioxide delay section that circulates the gas from the top to the bottom of the carbon dioxide curing tank, and supplies the gas circulated in the upper part of the carbon dioxide curing tank to the discharge section with a flow path cross-sectional area S2 that is smaller than the flow path cross-sectional area S1 when circulating downwards, to the discharge section, in a carbon dioxide curing system for hydraulic curing bodies.

4. A carbonation curing tank for containing a hydraulically hardened body, A supply unit that supplies a carbon dioxide-containing gas with a CO2 concentration higher than that of air into the carbonation curing tank, A discharge unit that discharges a gas containing at least carbon dioxide from the inside of the carbonation curing tank to the outside of the carbonation curing tank, A blower is provided inside the carbonation curing tank to blow a gas containing CO2 onto the surface of the hydraulic hardened body. Equipped with, The supply unit is a carbonate curing system for hydraulic curing bodies, provided at the lower part of the side wall of the carbonate curing tank.

5. The carbonate curing system for a hydraulic curing body according to any one of claims 1 to 4, further comprising a heater provided inside the carbonate curing tank for heating the gas inside the carbonate curing tank when the temperature inside the carbonate curing tank is below a predetermined level.

6. The carbonate curing system for a hydraulic curing body according to any one of claims 1 to 4, further comprising a cooler provided inside the carbonate curing tank for cooling the gas inside the carbonate curing tank when the temperature inside the carbonate curing tank is higher than a predetermined level.

7. Inside the carbonation curing tank containing the hydraulically hardened body, CO2 is present, rather than air. ２ A filling process in which a gas containing a high concentration of carbon dioxide is filled, A curing step in which the hydraulic hardened body is carbonated and cured by carbon dioxide gas filled inside the carbonation curing tank in the filling step, After the curing process, a discharge process is performed to discharge a gas containing at least carbon dioxide from inside the carbonation curing tank to outside the carbonation curing tank. It has, In the aforementioned curing process, CO ２ A method for controlling the carbonation curing of a hydraulic hardened body, comprising applying a gas containing to the surface of the hydraulic hardened body to carbonate the hydraulic hardened body, A method for managing the carbonation curing of a hydraulic curing body, comprising a plurality of carbonation curing tanks, the carbonation curing tanks being connected to one another, and supplying a gas containing at least carbon dioxide discharged from one carbonation curing tank to the inside of a separate carbonation curing tank.

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