JP2019178868A - Curing management method of concrete structure - Google Patents

Abstract

To provide a curing management method for a concrete structure capable of performing appropriate curing management for the concrete structure without measuring the internal temperature of the concrete structure.SOLUTION: The curing management method of a concrete structure includes: a concrete structure installation step for installing concrete in a space surrounded by a structure formwork for constructing the concrete structure; a concrete model installation step for installing concrete into a space surrounded by a model formwork for building a concrete model that simulates the concrete structure; a concrete model internal temperature measurement step for measuring continuously the internal temperature of the concrete model before curing using a temperature measuring device provided in the space surrounded by the model formwork; and a concrete structure temperature management step for controlling a set temperature of a first temperature heating device provided in the structure formwork based on the internal temperature of the concrete model measured by the temperature measuring device.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a curing management method for a concrete structure.

  It is known that the strength (compressive strength) of concrete varies greatly depending not only on the mixing ratio of materials but also on the construction method and curing method. In the concrete structure curing management method, concrete is placed inside a formwork for constructing a concrete structure, a temperature center is embedded, and the internal temperature of the concrete structure is measured by the temperature sensor. There is a method of performing management (see, for example, Patent Document 1). Patent Document 1 discloses that heat curing is performed by a panel heater, which is a heating device installed in the vicinity of a column base of a formwork, in order to develop a desired strength in a concrete structure. More specifically, Patent Document 1 discloses that the control of the panel heater is performed by the control device so that the internal temperature of the concrete structure becomes 80 ° C. or higher for a predetermined period (72 hours or longer) with 83 ° C. as a boundary value. Has been.

Japanese Patent No. 6126854

  However, since Patent Document 1 embeds a temperature sensor, which is an inclusion, inside a concrete structure, there is a possibility that the periphery where the temperature sensor is embedded becomes a starting point of destruction or corrosion. On the other hand, if the temperature sensor is not embedded inside the concrete structure, the internal temperature of the concrete structure cannot be known, so appropriate curing management cannot be performed, and the desired strength cannot be expressed stably. There is.

  In view of the above circumstances, at least one embodiment of the present invention is a curing management of a concrete structure capable of performing appropriate curing management on the concrete structure without measuring the internal temperature of the concrete structure. It aims to provide a method.

(1) A curing management method for a concrete structure according to at least one embodiment of the present invention,
A curing management method for a concrete structure,
A concrete structure placing step for placing concrete in a space surrounded by a structural formwork for constructing the concrete structure;
A concrete simulated body placing step of placing concrete of the same material as the concrete of the concrete structure in a space surrounded by a mockup form for constructing a concrete simulated body that simulates the concrete structure; ,
A simulated body internal temperature measurement step for continuously measuring the internal temperature of the concrete simulated body before curing by means of a temperature measuring device installed in a space surrounded by the simulated body mold,
A concrete structure temperature management step for controlling a set temperature of a first temperature heating device provided in the formwork for the structure based on an internal temperature of the concrete simulated body measured by the temperature measuring device. .

  According to the above method (1), the structure formwork can be obtained based on the internal temperature of the concrete simulated body without embedding a temperature measuring device in the concrete structure and measuring the internal temperature of the concrete structure. Appropriate curing management can be performed by controlling the set temperature of the first temperature heating device provided in the above and raising or holding the temperature of the concrete structure by the heat supplied from the first temperature heating device. .

(2) In some embodiments, in the method of (1) above,
The concrete structure temperature management step includes:
A concrete simulated body temperature raising step for controlling the set temperature of the second temperature heating device provided in the mold for the simulated body so as to be gradually or stepwise increased until the set temperature reaches a predetermined upper limit temperature. including.

  According to the above method (2), the internal temperature of the concrete simulated body can be raised by the second temperature heating device, and the setting of the first temperature heating device is based on the internal temperature of the concrete simulated body. Appropriate curing management can be performed by controlling the temperature.

  In addition, by increasing the internal temperature of the concrete simulated body by the second temperature heating device and promoting the hydration reaction of the cement contained in the concrete simulated body, the hardening of the concrete simulated body is promoted and the strength of the concrete simulated body is expressed. Promotion can be aimed at.

(3) In some embodiments, in the method of (2) above,
In the concrete structure temperature management step, the set temperature of the first temperature heating device during the temperature increase step of the concrete simulated body is a predetermined temperature higher than the internal temperature of the concrete simulated body measured by the temperature measurement device. Control to be higher.

  According to the method of (3) above, the concrete structure is controlled by controlling the set temperature of the first temperature heating device to be higher than the internal temperature of the concrete simulated body by a predetermined temperature during the concrete simulated body heating step. The internal temperature of the body can be raised gradually or stepwise to correspond to the internal temperature of the concrete simulated body. Thus, by making the history of the internal temperature of the concrete structure correspond to the history of the internal temperature of the concrete simulated body, the concrete structure can express a desired strength, and the concrete structure and the concrete simulated body are expressed. It is possible to prevent a difference in strength.

  Also, by increasing the internal temperature of the concrete structure with the first temperature heating device and promoting the hydration reaction of the cement contained in the concrete structure, the hardening of the concrete structure is promoted and the strength of the concrete structure is expressed. Promotion can be aimed at.

(4) In some embodiments, in the method of (2) or (3) above,
The concrete structure temperature management step includes:
After the concrete simulated body temperature raising step, a concrete simulated body heat retaining step is further included for controlling the set temperature of the second temperature heating device to be maintained at the upper limit temperature.

  According to the method of (4) above, in the concrete simulated body warming step, the gradient of the temperature drop after the hydration reaction of the cement contained in the concrete simulated body has been moderated can be moderated. Appropriate curing management can be performed by controlling the set temperature of the first temperature heating device based on the internal temperature of the simulated body.

  Also, in the concrete simulated body warming step, the gradient of the temperature drop after the hydration reaction of the cement contained in the concrete simulated body has been moderated can be moderated, thus avoiding the occurrence of cracks due to shrinkage of the concrete simulated body. It is possible to stabilize the strength developed by the simulated concrete body.

(5) In some embodiments, in the method of (4) above,
In the concrete structure temperature management step, the set temperature of the first temperature heating device is controlled to be maintained at the same temperature as the set temperature of the second temperature heating device during the concrete simulated body temperature keeping step.

  According to the method of (5) above, the concrete structure and the concrete are maintained by maintaining the set temperature of the first temperature heating device at the same temperature as the set temperature of the second temperature heating device during the concrete simulated body warming step. It is possible to prevent a difference in strength developed by the simulated body.

  In addition, in the concrete simulated body warming step, the slope of the temperature drop after the hydration reaction of the cement contained in the concrete structure has become gradual can be moderated, thus avoiding the occurrence of cracks due to shrinkage of the concrete structure. In addition, the strength of the concrete structure can be stabilized.

(6) In some embodiments, in the methods (2) to (5) above,
The concrete structure temperature management step includes:
When the outside air temperature is equal to or lower than a predetermined temperature, the set temperature of the second temperature heating device is controlled to be maintained at a temperature higher than the outside air temperature by a predetermined time before the concrete simulated body heating step. The method further includes a step of preheating the concrete simulation body.

  According to the above method (6), when the outside air temperature is low, the set temperature of the second temperature heating device is maintained at a temperature higher than the outside air temperature by a predetermined temperature for a certain period before the concrete simulated body heating step. Thus, a decrease in the internal temperature of the concrete simulated body due to the outside air temperature can be prevented, and by controlling the set temperature of the first temperature heating device based on the internal temperature of the concrete simulated body, an appropriate temperature can be obtained. Curing management can be performed.

  In addition, when the outside air temperature is low, the set temperature of the second temperature heating device is maintained at a temperature higher than the outside air temperature by a predetermined temperature before the concrete simulated body heating step, and the concrete simulated body by the outside air temperature is maintained. By preventing a decrease in the internal temperature, it is possible to prevent a delay in the curing reaction of the concrete simulated body due to the outside air temperature and a decrease in the strength of the concrete simulated body.

(7) In some embodiments, in the method of (6) above,
The concrete structure temperature management step controls the set temperature of the first temperature heating device to be kept at the same temperature as the set temperature of the second temperature heating device during the concrete simulated body preheating step.

  According to the method of (7) above, the concrete structure and the concrete are maintained by maintaining the set temperature of the first temperature heating device at the same temperature as the set temperature of the second temperature heating device during the pre-heating step of the simulated concrete body. It is possible to prevent a difference in strength developed by the simulated body.

  In addition, when the outside air temperature is low, before the concrete simulated body temperature raising step, the set temperature of the first temperature heating device is maintained at a temperature higher than the outside air temperature by a predetermined temperature for a certain period of time, and the concrete structure by the outside temperature By preventing a decrease in the internal temperature, it is possible to prevent a delay in the curing reaction of the concrete structure due to the outside air temperature and a decrease in the strength of the concrete structure.

(8) In some embodiments, in the methods (1) to (7) above,
The method further includes a step of collecting a core from the hardened concrete simulated body after a predetermined period of time from the concrete simulated body placing step and performing a strength test of the core.

  According to the method (8), it is possible to confirm that the hardened concrete structure has a desired strength by measuring the strength of the core of the hardened concrete simulated body.

(9) In some embodiments, in the methods (1) to (8) above,
The concrete structure placing step and the concrete simulated body placing step are performed at the same time.
According to the method of (9) above, the timing of the hydration reaction of the cement contained in the concrete structure and the timing of the hydration reaction of the cement contained in the concrete simulated body can be matched. It is possible to prevent a difference in strength developed by the simulated body.

(10) In some embodiments, in the above methods (1) to (9),
The concrete of the concrete structure is ultra high strength concrete.
According to the above method (10), even if the concrete for constructing the concrete structure is ultra-high-strength concrete, it is possible to perform appropriate curing management so as to express desired strength without generating cracks. .

  According to at least one embodiment of the present invention, there is provided a curing management method for a concrete structure capable of performing appropriate curing management on the concrete structure without measuring the internal temperature of the concrete structure. .

It is a figure for demonstrating the curing management method of the concrete structure which concerns on one Embodiment of this invention, Comprising: It is a block diagram of the curing management system of a concrete structure. It is a flowchart of the curing management method of the concrete structure which concerns on one Embodiment of this invention. It is a figure for demonstrating the curing management method of the concrete structure which concerns on other one Embodiment of this invention, Comprising: It is a block diagram of the curing management system of a concrete structure. It is a flowchart of an example of the concrete structure temperature management step shown in FIG. It is a figure which shows the relationship between the internal temperature of the concrete simulation body in the flowchart shown in FIG. 4, and the preset temperature of a 1st temperature heating apparatus and a 2nd temperature heating apparatus. It is a flowchart of another example of the concrete structure temperature management step shown in FIG. It is a figure which shows the relationship between the internal temperature of the concrete simulation body in the flowchart shown in FIG. 6, and the preset temperature of a 1st temperature heating apparatus and a 2nd temperature heating apparatus.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
For example, an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
For example, expressions representing shapes such as quadrangular shapes and cylindrical shapes represent not only geometrically strict shapes such as quadrangular shapes and cylindrical shapes, but also irregularities and chamfers as long as the same effects can be obtained. A shape including a part or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of the other constituent elements.

  FIG. 1 is a diagram for explaining a concrete structure curing management method according to an embodiment of the present invention, and is a configuration diagram of a concrete structure curing management system. FIG. 2 is a flow diagram of a concrete structure curing management method according to an embodiment of the present invention. The concrete structure curing management method 1 will be described below based on the concrete structure curing management system 2 shown in FIG. 1 and the flowchart shown in FIG. 2.

  As shown in FIG. 2, the concrete structure curing management method 1 according to some embodiments includes a concrete structure placing step S101, a concrete simulated body placing step S102, and a simulated body internal temperature measuring step S103. And a concrete structure temperature management step S104.

  In the concrete structure placing step S101, concrete is placed in a space surrounded by the structural form 31 for constructing the concrete structure 3 (actual structure). In the embodiment shown in FIG. 1, the concrete structure 3 includes a pillar member for constituting a building structure. As shown in FIG. 1, the structure formwork 31 is provided in a square tube shape by combining steel plates, and concrete is placed in an inner space from an opening provided above.

  In the concrete simulated body placing step S102, concrete is placed in a space surrounded by a simulated body form 41 for constructing a concrete simulated body 4 simulating the concrete structure 3. Here, “simulate” means that the concrete simulated body 4 is made to have the same external dimensions (width dimension and depth dimension) as the concrete structure 3 and the length dimension (height dimension) is shortened as shown in FIG. And the same shape as the concrete structure 3 or a similar shape. As shown in FIG. 1, the mock-up form 41 is provided in a rectangular tube shape by combining steel plates, as in the case of the structure 31, and enters the inner space from the opening provided above. Concrete is cast.

  The concrete simulated body 4 is constructed by concrete of the same material as the concrete of the concrete structure 3. In addition, it is desirable to place the concrete of the same lot formed by mixing in both the space surrounded by the structural form 31 and the space surrounded by the simulated form 41. In this case, it is possible to prevent a difference in strength between the concrete structure 3 and the concrete simulated body 4 from occurring.

  Any of the concrete structure placing step S101 and the concrete simulated body placing step S102 may be performed first, but is desirably performed at the same time. In this case, the timing of the hydration reaction of the cement contained in the concrete structure 3 and the timing of the hydration reaction of the cement contained in the concrete simulated body 4 can be matched, so the concrete structure 3 and the concrete simulated body It is possible to prevent a difference from occurring in the intensity at which 4 is developed.

  In the simulated body internal temperature measurement step S103, the internal temperature Ti of the concrete simulated body 4 before hardening is continuously measured by the temperature measuring device 5 installed in the space surrounded by the simulated body mold 41. It has become. The temperature measuring device 5 includes a temperature sensor, a temperature recorder, and the like, and is configured to be able to continuously measure the internal temperature Ti of the concrete simulated body 4. As shown in FIG. 1, the temperature measuring device 5 is installed at the center in the space surrounded by the mock-up form 41 in order to measure the internal temperature Ti at the center position of the concrete simulated body 4. .

  In the concrete structure temperature management step S104, the set temperature Ts1 of the first temperature heating device 32 provided in the structure mold 31 is based on the internal temperature Ti of the concrete simulated body 4 measured by the temperature measuring device 5. It comes to control. The 1st temperature heating apparatus 32 contains the cable-shaped heater affixed on each outer peripheral surface of the form 31 for structures, as FIG. 1 shows. The first temperature heating device 32 is configured to be able to supply heat at a temperature set to the set temperature Ts <b> 1 to the concrete structure 3 via the structure mold 31.

  The control in the concrete structure temperature management step S104 is performed by a control device 6 electrically connected to the temperature measuring device 5 and the first temperature heating device 32 as shown in FIG. The configuration of the control device 6 will be described later. In addition, you may perform control in concrete structure temperature management step S104 manually.

  The simulated body internal temperature measurement step S103 and the concrete structure temperature management step S104 are continuously performed until the curing of the concrete structure 3 is completed (in the case of “No” in step S105).

  As described above, the concrete structure curing management method 1 according to some embodiments includes the above-described concrete structure placing step S101, the above-described concrete simulated body placing step S102, and the above-described simulated body internal temperature. The measurement step S103 and the concrete structure temperature management step S104 described above are provided.

  For this reason, according to the above method, even if the temperature measuring device 5 is embedded in the concrete structure 3 and the internal temperature of the concrete structure 3 is not measured, the internal temperature Ti of the concrete simulated body 4 is determined. Appropriate curing is achieved by controlling the set temperature Ts1 of the first temperature heating device 32 provided in the structure mold 31 and maintaining or raising the temperature of the concrete structure 3 by the first temperature heating device 32. Management can be performed.

  Hereinafter, the concrete structure temperature management step S104 described above will be described in more detail based on FIGS. Here, FIG. 3 is a diagram for explaining a curing management method for a concrete structure according to another embodiment of the present invention, and is a configuration diagram of the curing management system for the concrete structure. FIG. 4 is a flowchart of an example of the concrete structure temperature management step shown in FIG. FIG. 5 is a diagram showing the relationship between the internal temperature of the simulated concrete body in the flowchart shown in FIG. 4 and the set temperatures of the first temperature heating device and the second temperature heating device.

  In some embodiments, as shown in FIG. 4, the above-described concrete structure temperature management step S104 includes a concrete simulated body temperature raising step S201. In the concrete simulated body heating step S201, as shown in FIG. 5, the set temperature Ts2 of the second temperature heating device 42 provided in the simulated body mold 41 is changed until the set temperature Ts2 reaches a predetermined upper limit temperature Tu. The control is performed so as to raise gradually or stepwise.

  As shown in FIG. 3, the second temperature heating device 42 includes a cable-like heater that is affixed to each outer peripheral surface of the simulated body mold 41, as with the first temperature heating device 32. The second temperature heating device 42 is configured to be able to supply heat at a temperature set to the set temperature Ts2 to the concrete simulated body 4 via the simulated body mold 41. The 2nd temperature heating apparatus 42 is electrically connected to the control apparatus 6, as FIG. 3 shows.

  According to the above method, the internal temperature Ti of the concrete simulated body 4 can be raised by the second temperature heating device 42, and the first temperature heating device is based on the internal temperature Ti of the concrete simulated body 4. Appropriate curing management can be performed by controlling the set temperature Ts1 of 32.

  Further, the internal temperature Ti of the concrete simulated body 4 is increased by the second temperature heating device 42 to promote the hydration reaction of the cement contained in the concrete simulated body 4, thereby promoting the hardening of the concrete simulated body 4 and the concrete simulation. The strength expression of the body 4 can be promoted.

  4 and 5, in the concrete structure temperature management step S104, the set temperature Ts1 of the first temperature heating device 32 is measured by the temperature measuring device 5 during the concrete simulated body heating step S201. Control is performed so as to be higher than the internal temperature Ti of the concrete simulated body 4 by a predetermined temperature Td. Here, the internal temperature of the concrete structure 3 rises due to heat generated by the hydration reaction of cement contained in the concrete structure 3 and heat supply by the first temperature heating device 32. Further, the internal temperature Ti of the concrete simulated body 4 rises due to heat generated by the hydration reaction of cement contained in the concrete simulated body 4 and heat supply by the second temperature heating device 42.

  According to the above method, the set temperature Ts1 of the first temperature heating device 32 becomes higher than the internal temperature Ti of the concrete simulated body 4 by a predetermined temperature Td (for example, 10 ° C.) during the concrete simulated body temperature increasing step S201. By controlling as described above, the internal temperature of the concrete structure 3 can be gradually or stepwise increased so as to correspond to the internal temperature Ti of the concrete simulated body 4. Thus, by making the history of the internal temperature of the concrete structure 3 correspond to the history of the internal temperature Ti of the concrete simulated body 4, the concrete structure 3 can express a desired strength, and the concrete structure 3 and the concrete simulated It is possible to prevent a difference in strength that the body 4 develops.

  Further, by increasing the internal temperature of the concrete structure 3 by the first temperature heating device 32 and promoting the hydration reaction of the cement contained in the concrete structure 3, the hardening of the concrete structure 3 and the concrete structure are accelerated. 3 can be promoted.

  In some embodiments, as shown in FIG. 4, the above-described concrete structure temperature management step S104 further includes a concrete simulated body heat retaining step S202. In the concrete simulated body warming step S202, as shown in FIG. 5, after the concrete simulated body warming step S201, control is performed so that the set temperature Ts2 of the second temperature heating device 42 is maintained at the above-described upper limit temperature Tu. It has become.

  Even if the set temperature Ts2 of the second temperature heating device 42 is maintained at the above-described upper limit temperature Tu in the concrete simulated body heat retaining step S202, as shown in FIG. 5, the hydration reaction of cement contained in the concrete simulated body 4 Until the temperature becomes moderate, the internal temperature Ti of the concrete simulated body 4 continuously rises due to heat generated by the hydration reaction of the cement, and exceeds the set temperature Ts2 of the second temperature heating device 42. And after the hydration reaction of the cement contained in the concrete simulated body 4 becomes gentle, as shown in FIG. 5, the internal temperature Ti of the concrete simulated body 4 decreases, but the second temperature heating device 42 Since the set temperature Ts2 is held at the above-described upper limit temperature Tu, the gradient of the temperature drop becomes gentle.

  According to the above method, the gradient of the temperature drop after the hydration reaction of the cement contained in the concrete simulated body 4 becomes gentle in the concrete simulated body keeping step S202 can be moderated, and such a concrete simulated Appropriate curing management can be performed by controlling the set temperature of the first temperature heating device 32 based on the internal temperature Ti of the body 4.

  Further, in the concrete simulated body heat retaining step S202, the gradient of the temperature drop after the hydration reaction of the cement contained in the concrete simulated body 4 becomes gentle can be moderated. While avoiding, the intensity | strength which the concrete simulated body 4 expresses can be stabilized.

  In the embodiment shown in FIGS. 4 and 5, the concrete structure temperature management step S104 uses the set temperature Ts1 of the first temperature heating device 32 as the set temperature of the second temperature heating device 42 in the concrete simulated body heat retaining step S202. Control is performed so as to maintain the same temperature as Ts2.

  According to the above method, the concrete structure is maintained by maintaining the set temperature Ts1 of the first temperature heating device 32 at the same temperature as the set temperature Ts2 of the second temperature heating device 42 in the concrete simulated body heat retaining step S202. It is possible to prevent a difference between the strengths developed by 3 and the concrete simulated body 4 from occurring.

  In addition, in the simulated concrete body heat retaining step S202, the gradient of the temperature drop after the hydration reaction of the cement contained in the concrete structure 3 becomes gentle can be moderated, so that cracking due to the shrinkage of the concrete structure 3 can be prevented. While avoiding, the intensity | strength which the concrete structure 3 expresses can be stabilized.

  Hereinafter, the concrete structure temperature management step S104 described above when the outside air temperature To is equal to or lower than the predetermined temperature will be described in more detail with reference to FIGS. Here, FIG. 6 is a flowchart of another example of the concrete structure temperature management step shown in FIG. FIG. 7 is a diagram showing the relationship between the internal temperature of the simulated concrete body in the flowchart shown in FIG. 6 and the set temperatures of the first temperature heating device and the second temperature heating device.

  In some embodiments, as shown in FIG. 6, the concrete structure temperature management step S104 further includes a concrete simulation body preheating step S301. In the concrete simulated body preheating step S301, as shown in FIG. 7, when the outside air temperature To is equal to or lower than a predetermined temperature, the set temperature Ts2 of the second temperature heating device 42 is set to the outside air before the concrete simulated body heating step S201. Control is performed so as to maintain a temperature Tb higher than the temperature To by a predetermined temperature for a certain period.

  The outside air temperature To is measured by an outside air temperature measuring device 7 as shown in FIG. As shown in FIG. 3, the outside air temperature measuring device 7 includes a temperature sensor, a temperature recorder, and the like, and is provided in the vicinity of the place where the concrete structure 3 or the concrete simulated body 4 is installed, and continuously maintains the outside air temperature To. It is configured to be measurable. As shown in FIG. 3, the outside air temperature measurement device 7 is electrically connected to the control device 6.

  According to the above method, when the outside air temperature To is low, the set temperature Ts2 of the second temperature heating device 42 is constant at a temperature Tb that is higher than the outside air temperature To by a predetermined temperature before the concrete simulated body heating step S201. It is possible to prevent the decrease of the internal temperature Ti of the concrete simulated body 4 due to the outside air temperature To by holding the period, and the setting of the first temperature heating device 32 based on the internal temperature Ti of the concrete simulated body 4 Appropriate curing management can be performed by controlling the temperature Ts1.

  In addition, when the outside air temperature To is low, before the concrete simulated body heating step S201, the set temperature Ts2 of the second temperature heating device 42 is held at a temperature Tb higher than the outside air temperature To by a predetermined temperature for a certain period of time, By preventing a decrease in the internal temperature Ti of the concrete simulated body 4 due to the outside air temperature To, it is possible to prevent a delay in the curing reaction of the concrete simulated body 4 due to the outside air temperature To and a decrease in the strength of the concrete simulated body 4.

  6 and 7, in the concrete structure temperature management step S104, the set temperature Ts1 of the first temperature heating device 32 is set to the set temperature of the second temperature heating device 42 in the concrete simulated body preheating step S301. Control is performed so as to maintain the same temperature as Ts2.

  According to the above method, the concrete structure is maintained by maintaining the set temperature Ts1 of the first temperature heating device 32 at the same temperature as the set temperature Ts2 of the second temperature heating device 42 during the concrete simulated body preheating step S301. It is possible to prevent a difference between the strengths developed by 3 and the concrete simulated body 4 from occurring.

  Further, when the outside air temperature To is low, the set temperature Ts1 of the first temperature heating device 32 is held at a temperature Tb higher than the outside air temperature To by a predetermined temperature before the concrete simulated body heating step S201 for a certain period. By preventing a decrease in the internal temperature of the concrete structure 3 due to the outside air temperature To, it is possible to prevent a delay in the curing reaction of the concrete structure 3 due to the outside air temperature To and a decrease in the strength of the concrete structure 3.

  In some of the embodiments described above, as shown in FIG. 2, after a predetermined period of time elapses from the concrete simulated body placing step S102, a core is sampled from the hardened concrete simulated body 4, and a core strength test is performed. Is further provided. In this case, by measuring the strength of the core of the cured concrete simulated body 4, it can be confirmed that the cured concrete structure 3 has a desired strength.

In some embodiments mentioned above, the concrete which constructs concrete structure 3 contains ultra high strength concrete. Here, the “super high strength concrete” has a design standard strength of 40 N / mm ² or more and 500 N / mm ² or less, preferably a design standard strength of 60 N / mm ² or more and 400 N / mm ² or less, more preferably a design standard. Concrete having a strength of 100 N / mm ² or more and 300 N / mm ² or less. In this case, even if the concrete that constructs the concrete structure 3 is ultra-high-strength concrete, it is possible to perform appropriate curing management so as to express desired strength without generating cracks.

  In some of the above-described embodiments, the structural form 31 and the simulated form 41 are arranged in the same environment. Here, “under the same environment” means that the history of the outside air temperature and the history of the outside air humidity are equivalent, and the structure mold 31 and the simulated body mold 41 have the history of the outside air temperature and the outside air humidity. For example, it is not included that the history is different, for example, it is separately installed outdoors and indoors, and it is not arranged at two points with different longitudes and latitudes. In this case, since the concrete structure 3 and the concrete simulated body 4 are constructed in the same environment, there is a difference in strength between the concrete structure 3 and the concrete simulated body 4 due to the outside air temperature and the outside air humidity. Can be prevented.

  In some of the embodiments described above, each of the structural form 31 and the simulated form 41 is provided with at least one outer surface such as a heat insulating material or a heat insulating material (not shown). Note that a heat insulating material, a heat insulating material, and the like (not shown) may surround the outer periphery of each of the structural form 31 and the simulated form 41. Moreover, you may attach a heat insulating material, a heat insulating material, etc. which are not shown in figure to the upper surface after placing concrete of the structure form 31 and the simulation form 41. In these cases, the influence of the outside air temperature To on the concrete structure 3 and the concrete simulated body 4 can be reduced.

  In some of the above-described embodiments, the concrete structure 3 includes a column member for constituting a building structure. However, the concrete structure 3 includes a beam member, a pile, and the like for constituting the building structure. May be included. Moreover, the concrete structure 3 and the concrete simulation body 4 may have reinforcing bars arranged inside, or a part of the reinforcing bars may protrude outside.

  In some embodiments described above, the concrete for constructing the concrete structure 3 is ultra-high-strength concrete, but is designed from high-strength concrete having a design standard strength lower than that of ultra-high-strength concrete or high-strength concrete. Ordinary concrete having a low standard strength may be used.

  In some embodiments, the concrete structure curing management system 2 includes, as shown in FIGS. 1 and 3, at least the first temperature heating device 32, the temperature measurement device 5, and the control device 6 described above. I have. Further, as shown in FIG. 3, the concrete structure curing management system 2 may further include a second temperature heating device 42, and may further include an outside air temperature measuring device 7.

  The control device 6 has a program for performing the control in the above-described embodiments, and is configured to be able to execute the program. More specifically, the control device 6 includes a storage device (ROM, RAM) (not shown) that can store various types of input information, various programs necessary for control execution, calculation results, and the like, and the various types of information described above. An arithmetic device (CPU) (not shown) that performs arithmetic processing based on the input / output device (input / output interface) that inputs / outputs various information from each component included in the curing management system 2 of the concrete structure; , Including.

  The present invention is not limited to the above-described embodiments, and includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.

DESCRIPTION OF SYMBOLS 1 Curing management method of concrete structure 2 Curing management system of concrete structure 3 Concrete structure 31 Formwork for structure 32 First temperature heating device 4 Simulated concrete 41 Formwork for simulated body 42 Second temperature heating device 5 Temperature Measuring device 6 Control device 7 Outside air temperature measuring device Td Predetermined temperature Ti Internal temperature To Outside air temperature Ts1, Ts2 Set temperature Tu Upper limit temperature

Claims (10)

A curing management method for a concrete structure,
A concrete structure placing step for placing concrete in a space surrounded by a structural formwork for constructing the concrete structure;
A concrete simulated body placing step of placing concrete of the same material as the concrete of the concrete structure in a space surrounded by a mockup form for constructing a concrete simulated body that simulates the concrete structure; ,
A simulated body internal temperature measurement step for continuously measuring the internal temperature of the concrete simulated body before curing by means of a temperature measuring device installed in a space surrounded by the simulated body mold,
A concrete structure temperature management step for controlling a set temperature of the first temperature heating device provided in the formwork for the structure based on an internal temperature of the concrete simulated body measured by the temperature measuring device;
Curing management method for concrete structure comprising The concrete structure temperature management step includes:
A concrete simulated body temperature raising step for controlling the set temperature of the second temperature heating device provided in the mold for the simulated body so as to be gradually or stepwise increased until the set temperature reaches a predetermined upper limit temperature. The curing management method for a concrete structure according to claim 1. In the concrete structure temperature management step, the set temperature of the first temperature heating device during the temperature increase step of the concrete simulated body is a predetermined temperature higher than the internal temperature of the concrete simulated body measured by the temperature measurement device. It controls so that it may become high. The curing management method of the concrete structure of Claim 2. The concrete structure temperature management step includes:
4. The concrete simulated body holding step for controlling the concrete simulated body warming step for controlling the set temperature of the second temperature heating device to be held at the upper limit temperature after the concrete simulated body temperature raising step. 5. Curing management method. The concrete structure temperature management step controls the set temperature of the first temperature heating device to be kept at the same temperature as the set temperature of the second temperature heating device during the concrete simulated body temperature keeping step. 4. Curing management method for concrete structure according to 4. The concrete structure temperature management step includes:
When the outside air temperature is equal to or lower than a predetermined temperature, the set temperature of the second temperature heating device is controlled to be maintained at a temperature higher than the outside air temperature by a predetermined time before the concrete simulated body heating step. The method for curing management of a concrete structure according to any one of claims 2 to 5, further comprising a pre-simulating step of presimulating the concrete body. The concrete structure temperature management step controls the set temperature of the first temperature heating device to be kept at the same temperature as the set temperature of the second temperature heating device during the concrete simulated body preheating step. The curing management method for a concrete structure according to 6. The concrete according to any one of claims 1 to 7, further comprising a step of collecting a core from the hardened concrete simulated body and performing a strength test of the core after a predetermined period of time has elapsed from the concrete simulated body placing step. Curing management method for structures. The curing management method for a concrete structure according to any one of claims 1 to 8, wherein the concrete structure placing step and the concrete simulated body placing step are performed simultaneously. The curing method for a concrete structure according to any one of claims 1 to 9, wherein the concrete of the concrete structure is ultra-high-strength concrete.

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