JP2014198987A - Reinforcement cover spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement cover spacer which enables normal communication with an IC tag embedded in the spacer from the outside of a construction without being influenced by a reinforcement and its arrangement, can secure a covering thickness when used as the spacer, is easy in attachment, has no necessity for separately attaching the IC tag, and does not cause a fault of the construction by installation.SOLUTION: A reinforcement cover spacer has a support part for attachment to a reinforcement and a spacer main body, and the spacer main body is embedded with an IC tag. The IC tag is embedded by d=0.2 L to 0.6 L (in the formula, d indicates a distance between a plane including an antenna of the embedded IC tag and a virtual plane at which the spacer abuts on a mold form, and L indicates a distance between the virtual plane at which the spacer abuts on the mold form and a surface of the reinforcement).

Description

  The present invention relates to a rebar cover spacer used for reinforced concrete.

  The reinforcement cover of a reinforced concrete structure is an important part for maintaining the durability of the structure. In order to ensure durability, it is necessary that the concrete quality of the cover is good without cracks, etc., and the thickness designed to ensure the required durability is ensured. It is important that Usually, the cover thickness is secured by rebar reinforcement work and the installation of the formwork, ensuring the cover as designed, but there are errors during construction such as displacement of the formwork and design errors. There is no denying the possibility of it occurring. Therefore, it is desired to confirm the cover thickness in the state of the finally completed concrete structure. Therefore, as a current confirmation method, nondestructive inspection is performed from the surface of a concrete structure by a radar method or an electromagnetic induction method (Patent Document 1, etc.). At this time, the measurement equipment is relatively expensive, and a great deal of labor is required to perform measurement over the entire building.

Furthermore, regardless of the presence or absence of the cover spacer, a method of estimating the cover thickness by installing an IC tag on a reinforcing bar in a concrete structure and measuring the position of the IC tag from the surface of the concrete structure after construction (Patent Document 2) ) Is also possible.

  However, the signal of the IC tag inside the structure is difficult to detect, or even if the signal can be detected, the sensitivity varies, and it is difficult to specify the position where the IC tag itself is installed. There is a problem. Even if a signal is detected, the position where the IC tag is embedded is determined by the strength of the radio wave returned from the IC tag and the direction of the radio wave detected at several external locations. is assumed.

  Further, in Patent Document 3, a part of the antenna is connected to the reinforcing bar so that the reinforcing bar plays the role of an antenna. Generally, the reinforcing bar is arranged according to the structure design of the structure to be constructed. Therefore, simply connecting a part of the antenna of the IC tag to the reinforcing bar does not always match the resonance frequency for establishing communication with the IC tag. In addition, it is difficult to adjust impedance matching only by slitting the antenna.

Furthermore, since the reinforcing bars are usually bound by a conductive metal string, the conductivity between the reinforcing bars may endlessly vary greatly, and it is difficult to grasp in advance at the time of design. Moreover, even if it is possible to read IC tags connected from a wide area, if multiple IC tags are arranged, it is difficult to separate IC tags to be read unless advanced technology such as anti-collision is used. .

JP 2010-14472 A JP 2004-294288 A JP 2009-282874 A

  The present invention has been made to solve the above-described problem, and can normally communicate with an IC tag embedded in a spacer from the outside of the structure without being affected by the reinforcing bars and the arrangement thereof, and is used as a spacer. Another object is to provide a rebar cover spacer that can secure the cover thickness, is easy to mount, does not require separate IC tag mounting, and does not cause structural defects due to installation.

In order to achieve the above-mentioned object, there is provided a reinforcing bar covering spacer characterized by having an attachment support part to a reinforcing bar and a spacer main body part, and the spacer main body part contains an IC tag.

The rebar cover spacer according to claim 1, wherein the IC tag is built in d = 0.2L to 0.6L. (Where d represents the distance between the plane including the antenna of the built-in IC tag and the virtual plane where the spacer contacts the mold, and L represents the distance from the virtual plane where the spacer contacts the mold to the surface of the reinforcing bar. Represents distance.)

The reinforcing bar covering spacer is characterized in that the IC tag is incorporated so that the surface formed including the antenna of the IC tag is parallel to the surface in contact with the mold.

Further, the present invention provides any one of the above reinforcing bar spacers, wherein the IC tag is a passive type.

The reinforcing bar spacer according to any one of the above-mentioned features is provided, wherein the attachment support part is slidably rotatable on the reinforcing bar.

Furthermore, the reinforcing bar covering spacer is characterized in that there is a gap into which concrete flows between a virtual plane that comes into contact with the mold and the spacer main body.

The reinforcing bar covering spacer is provided in which the spacer main body is a hydraulic composition or ceramics.

Reinforcing bar cover spacer, which has a mounting support part to the reinforcing bar and a spacer main body part, and the spacer main body part contains an IC tag including a memory for storing the cover thickness information from the mold surface. To do.

The above-mentioned spacer cover thickness guarantee value L or the measured value of the cover thickness, or pass certification information indicating that the spacer has a length capable of securing a specified cover thickness is stored in the internal memory of the IC tag 11. Or write to the database in the server linked to the ID of the IC tag, and when constructing the structure, after placing the reinforcing bar, attach the spacer to the reinforcing bar and install the formwork Then, a method for inspecting the reinforcing bar cover thickness is provided, in which concrete is placed and cured, and the information on the spacer is confirmed with a reader from the surface of the completed structure to guarantee a predetermined cover thickness.

The spacer according to any one of the above,
From the structure surface after completion, confirm the presence of the spacer, and obtain the cover thickness information;
A writer that writes the certification information to the internal memory of the IC tag built in the spacer, or a writing device to the database in the server linked to the ID of the IC tag,
There is provided a reinforcing bar cover thickness inspection system characterized by having at least.

In the system, further, the management information is written in the internal memory of the IC tag built in the spacer or in the database in the server in association with the ID of the IC tag. ,I will provide a.

Write the guaranteed cover thickness value L of the spacer or the proof information that the specified cover thickness is secured to the internal memory of the IC tag 11, or the ID of the IC tag After linking and writing to the database in the server and constructing the structure, after placing the reinforcing bar, attach the spacer to the reinforcing bar, install the formwork, place the concrete, cure, Provided is a method for inspecting a cover thickness by checking the presence / absence of the spacer with a reader from the surface of a structure to guarantee a predetermined cover thickness. Here, the cover thickness guarantee value L is “the distance from the virtual plane where the spacer abuts the mold to the surface of the steel frame”. The antenna distance d is “the distance between the plane including the antenna in the IC tag and the virtual plane where the spacer abuts the mold”.

According to the reinforcing bar cover spacer of the present invention, it is easy to install, and it is possible to secure the cover thickness without causing defects in the structure by installation, and it is not necessary to attach an RFID tag separately, and it is not affected by the reinforcing bar and its arrangement. Normal communication with IC tags embedded in spacers from outside the structure is possible.

  Furthermore, by storing information on the reinforcing bar cover thickness in an IC tag built in the spacer, it is possible to quickly inspect whether the cover thickness is equal to or greater than a predetermined value.

It is a figure which illustrates the projection view and perspective view of the Example of this invention. It is a figure which shows the positional relationship of the reinforcing bar cover spacer main-body part of another Example of this invention, and a reinforcing bar. It is the figure which illustrated the process of embedding an IC tag in a reinforcing bar cover spacer main-body part. It is the figure which showed an example of the attachment support part which mounts a reinforcing bar cover spacer main-body part to a reinforcing bar. Schematic diagram (a) when placing the reinforcing bar cover spacer of the present invention on the reinforcing bar, assembling the mold, and placing the concrete, and schematic diagram when the position of the mold fluctuates before and after placing the mold (B). It is a flowchart which illustrates the step which implements the test | inspection method of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Spacer body)
Mortar, ceramics, and plastic can be molded into a rectangular shape, a cylindrical shape, a conical shape, or the like. High-strength mortar is preferable, and it may be made of ceramics typified by Al ₂ O ₃ or ZrO ₂ . The spacer shape is basically rectangular. A triangular prism shape or a cylindrical shape may be used, but when contacting with the mold, the spacer function is not impaired and a predetermined distance between the predetermined position and the mold must be maintained. The dimension of the spacer is about 20 to 250 mm depending on the distance between the reinforcing bar and the formwork.

FIG. 2 illustrates the positional relationship between the cover spacer main body 10 and the reinforcing bar 30. The shape of the cover spacer main body 10 is not limited, but when the front side in the length direction of the reinforcing bar 30 is the front, the front view and the rear view are rectangles surrounded by four sides constricted inward. The right and left sides have the same shape, and the plan view and the bottom view have the same shape. These four surfaces are both center lines in the longitudinal direction of the reinforcing bars (shown with broken lines on the side, the broken lines on the front and back are constricted. It is preferable to use a V-shaped or U-shaped valley-shaped constricted surface with a valley bottom). The reinforcing bar is located along the constriction of the center line of the bottom surface. A plane including line A and line B on the plan view is a virtual contact surface with the mold.

The constriction on the surface that abuts the formwork is because the concrete does not flow into the constriction gap during placement and does not interfere with the filling of the concrete. This is because the concrete surface has a smooth finish with excellent smoothness. The constriction was made on the surface that contacts the rebar because the position when placing it on the rebar is surely placed at the design position, and the main body is reversible with respect to the plane including the antenna. This is to make the main body easier to manufacture.

Cover thickness in reinforced concrete and structures is the distance from the internal rebar closest to the surface of the structure to the surface of the structure after construction, and the cover thickness guarantee value L is `` a virtual plane where the spacer contacts the formwork Is the distance from the surface of the steel frame to the surface of the steel frame, and is determined by the shape of the individual spacers. The spacer is attached to the rebar closest to the surface, and is installed in order to keep the distance from the formwork before pouring the concrete above a certain level. In other words, the cover thickness is equal to or greater than the cover thickness guarantee value L by installing the spacer. An IC tag having an IC chip including a memory capable of storing a predetermined cover thickness guarantee value L and the like and an antenna is incorporated. The antenna applied to the IC tag is preferably arranged on a plane parallel to a virtual plane that is in contact with the formwork surface.

At this time, it is preferable to embed and harden the IC tag in advance in the hydraulic composition or ceramic so that the surface of the spacer contacting the mold and the antenna of the IC tag are parallel.

The IC tag 11 includes an IC chip having a memory and an antenna, and is built in the cover spacer. Information to be managed can be written in the IC chip memory at a construction site or factory, or at the time of construction or repair of a structure. The management information is not limited to the presence / absence information of the spacer, but includes information that can ensure traceability, such as design information of the construction itself and information at the time of construction in the construction process. Furthermore, the cover thickness guarantee value L, the cover thickness from the reinforcing bar in the reinforced concrete structure after construction secured by the spacer installation, or the information confirming the cover thickness guarantee value L tied to the ID of the IC tag is stored. it can. At this time, the shape of the IC tag is not limited as long as it can be embedded in the spacer, and various shapes such as a cylindrical shape, a disk shape, a plate shape, and a spherical shape can be used. When the surface including the antenna is a flat surface such as a disk shape or a plate shape, directivity of the antenna is improved by making it parallel to the construction surface (surface of the formwork). Therefore, it is easy to use the thin-plate IC tag that is most widely distributed. In that case, for example, it is preferable to be positioned on a plane surrounded by four center lines of the right side surface and the left side surface of FIG. 2 and the front view and the rear view. Thus, the plane including the antenna can be made coincident with this plane.

A known IC tag can be used, and a reader / writer can write and read information in a memory simultaneously with power supply. As a frequency band, generally used IC tags of several hundred KHz to 3 GHz can be used. Further, the logic circuit operates by supplying current generated by resonance of the antenna with radio waves from the reader / writer, and transmits information stored in the memory from the antenna 20 in response to an instruction from the reader / writer, or the reader / writer It is also possible to store information transmitted from the writer in the memory 11. The reader / writer is equipped with an antenna, and the reader / writer performs wireless communication with the IC tag via the antenna.
The distance between the plane including the antenna and the virtual plane in contact with the formwork is the antenna distance d. The antenna distance d is preferably set to d = 0.2L to 0.6L from the virtual plane. If it is smaller than 0.2L, the strength of the spacer itself may be reduced. If it is larger than 0.6L, there is an undeniable possibility that the antenna is close to a reinforcing bar and communication is hindered.

The IC tag embedded in the spacer is preferably a passive type. Since the spacer is installed inside the structure, it is difficult to exchange power or charge the battery or the like, and a passive type that does not have a battery can be used for a long time. Further, since no battery or the like is mounted, the spacer can be designed compactly.

In addition, an IC chip and an IC tag exterior material that protects an antenna may be wrapped with a material that transmits radio waves or a material that does not block a magnetic field. As examples of the protective material, for example, an inorganic material such as plastic, ceramics, concrete, and mortar, and a buffer sheet material and a nonwoven fabric used as a packaging material are also desirable.

FIG. 3 is a diagram illustrating a step (S11) of embedding the IC tag 11 in the cover spacer main body. That is, in FIG. 1, the main body is divided into an upper part 10b and a lower part 10a of the same shape on the right side and the left side, and the plane surrounded by the four center lines of the plan view and the bottom view, and the IC Adhere with mortar with tag 11 in between. The IC tag mounting portion can be sandwiched between the upper part 10b and the lower part 10a by adding a depression corresponding to the thickness of the IC tag to the shape. In casting molding, the lower portion 10a can be molded first, and after mounting the IC tag 11, mortar or the like corresponding to the upper portion 10b can be poured. In press molding, the lower portion 10a can be molded first, and before the mortar is cured, the upper portion 10b can be press molded, integrated, and then cured. It can be embedded in a semi-cured state.

(Manufacture of main body using hydraulic composition)
The manufacturing method by a hydraulic composition is illustrated below.
Mainly water, cement, sand, and gravel. When appropriate, blast furnace slag fine powder, fly ash, charcoal cal powder, and limestone fine powder are mixed in appropriate amounts, mixed with water, and poured into a mold.
Use a manufacturing method in which an IC tag is installed in a state that occupies a part of the formwork, the mortar (concrete) is poured into the remaining empty volume, and cured and cured in a normal temperature or high temperature steam environment. Can do. Thus, d = 0.2L-0.6L can be adjusted by adjusting the first and second pouring amounts.

Here, by changing the ratio and particle size of each material to make the fluidity hard, it is possible to produce not only by casting but also by press molding (immediate demolding). In the case of press molding, concrete that has not yet solidified up to a certain volume is press-molded in a mold, an IC tag is placed at a predetermined position, the concrete that occupies the remaining volume is covered, and press molding is performed again. After molding, it is possible to use a production method in which the mold is removed and cured and cured in a normal temperature or high temperature steam environment.

In addition, by using organic fibers typified by polypropylene fibers and polyvinyl alcohol fibers, the hydraulic composition has the effect of suppressing cracking during curing and the effect of suppressing brittle fracture caused by impact during dropping. can get. Further, from the viewpoint of ensuring normal communication from the outside of the structure without causing defects in the structure due to installation, the water-cement ratio is preferably 10 to 70%, and more preferably 20 to 65% from the viewpoint of workability.

It illustrates by the manufacturing method using the following materials.
1) Cement: Ordinary Portland cement (manufactured by Taiheiyo Cement)
2) Pozzolanic fine powder; silica fume (BET specific surface area 20 m2 / g)
3) Inorganic powder; quartz powder (average particle size 7 μm)
4) Aggregate: Silica sand No. 4 and No. 5 mixed sand with a mass ratio of 2: 1 5) Water reducing agent; Polycarboxylic acid-based high-performance AE water reducing agent 6) Water; Tap water

  100 parts by mass of normal Portland cement, 30 parts by mass of silica fume, 100 parts by mass of aggregate, 16 parts by mass of water, and 0.8 parts by mass of high-performance AE water reducing agent (in terms of solid content) are charged into a biaxial kneader and kneaded. For the first and second injections, spacer molding is performed in accordance with d = 0.5 L, the mold is removed after 24 hours in advance (20 ° C.), and then air-cured at 20 ° C. for 28 days.

As another blending, normal Portland cement 100 parts by weight, silica fume 30 parts by weight, quartz powder 30 parts by weight, aggregate 100 parts by weight, water 16 parts by weight, high performance AE water reducing agent 0.8 parts by weight (solid content conversion) Put into a biaxial kneader and knead. In the molding, the first and second pouring amounts were adjusted to d = 0.4L. After 24 hours in advance (20 ° C.), the mold is removed, and then air-cured at 20 ° C. for 28 days. Moreover, it is also preferable to mix about 0.5 to 3% of the volume of a kneaded material with polyvinyl alcohol fiber in order to suppress cracking and impart toughness to each formulation.

(Manufacture of main body using ceramics)
In addition to using a hydraulic composition such as mortar or concrete, it is also preferable to use ceramics such as Al ₂ O ₃ , ZrO ₂ , SiC, and Si ₃ N ₄ . In addition, all the surfaces of the IC tag to be embedded are spacers covered with a hydraulic composition or ceramics.

The production method using ceramics is exemplified below.
A concavo-convex cured body is produced with an inorganic composition typified by Al ₂ O ₃ and ZrO ₂ , SiC, Si ₃ N ₄ . Install the IC tag on the concave material and cover it with the convex member. In that case, it adheres and hardens | cures using a thermosetting adhesive, an ultraviolet curable adhesive, etc. If the IC tag is embedded in a flat shape such as a coin shape or a plate shape, the IC tag is embedded so that the flat surface faces the concrete surface side. In the case of a cylindrical shape or a spherical shape, the directivity changes depending on the shape of the built-in antenna, antenna characteristics, and antenna arrangement, so that the direction with the highest directivity is directed to the concrete surface side.

  Thus, since the IC tag is preliminarily included in the spacer main body, the IC tag is not damaged when placing the concrete in the concrete structure.

(Mounting support)
It is preferably metallic so that the spacer body can be mounted and supported at a predetermined interval.

FIG. 1 exemplifies the outline of the present invention having a rectangular shape. In (d), the perspective view of the main-body part of this cover spacer was shown with the positional relationship with the reinforcing bar 30. FIG. A formwork is installed above the perspective view. The cover spacer has an attachment support portion 20 to the reinforcing bar 30 and a spacer main body portion 10. (A) is a front view from a reinforcing bar length direction, and an upper broken line becomes an inner surface of a formwork. Therefore, the part below the broken line in (a) is filled with concrete. The attachment support part 20 illustrated the clip which processed the metal leaf | plate spring, for example. The mounting support part encloses the reinforcing bar on the one hand and connects to the main body part on the other hand. (B) is a right side view, the left side is the same as this, and (c) is a plan view. The spacer main body includes an IC tag 11 having an IC chip having a memory for storing a cover thickness guarantee value L from a virtual plane in contact with the mold and an antenna. In consideration of directivity, the antenna is positioned on a plane parallel to a virtual plane in contact with the mold.

In this way, the IC tag antenna is embedded so that the communication directivity of the antenna is strongly directed toward the concrete surface.

Assuming that the mounting support portion is `` slidable and rotatable '' on the reinforcing bar, for some reason, even if the formwork is displaced after construction, the distance d between the spacer, the virtual plane, and the plane including the antenna, as long as it closely contacts the spacer, Further, the cover thickness guarantee value L can be kept constant, and these numerical values are specific values of the spacer which are not affected by the variation after the construction.

FIG. 4 is a view showing an example in which the attachment support portion 20 for attaching the cover spacer main body portion to the reinforcing bar is a metallic clip. The mounting support part is manufactured (S12) by processing from a metal plate having a spring property to grip and fix the constriction of the cover body part, and the part surrounding the rebar 30 leaving room for sliding. It is synthesized and molded. The attachment support portion may be manufactured in advance separately from the spacer. When the attachment support portion 20 is used, the spacer main body portion can be mounted in a state where the rebar can be rotated around the central axis while wrapping the long and thin cylindrical rebar 30.

Table 1 and FIG. 6 show a table showing steps when the cover thickness inspection method is carried out and a flowchart thereof. Measure the cover thickness of the main body part of the spacer that manufactured the main body part and the support part as described above (S13), or (or pass the certificate of having a length that can secure the specified cover), IC Write to the internal memory of the tag 11 or link the measured size value or pass slip to the ID of the IC tag and write to the database in the server (S14). At this time, the cover thickness guarantee value L itself or a model number corresponding to the cover thickness guarantee value L can be written and used as a product identifier.
Specifically, for example, it can be carried out by any one or a plurality of patterns as described below.
1. At the factory or construction site, measure the cover thickness guarantee value L and enter it with a lighter.
2. Measure the cover thickness guarantee value L at the construction site, confirm that the spacer is suitable for the part, and enter the acceptance mark with a lighter.
3. At the site, the cover thickness guarantee value L is present (or the stamped format is read), or the ID of the IC tag that replaces this is read with a reader, and a confirmation mark is input with a writer. When storing the cover thickness guarantee value L and acceptance mark information on the server, read the ID of the IC tag embedded when inputting the information with the writer using the method described above, and then check the ID and cover thickness. Save the guaranteed value L and acceptance mark information in the database so that they can be linked. The cover thickness guarantee value, the cover thickness measurement value, the pass sheet, and the confirmation sheet are referred to as cover thickness information. Moreover, the pass slip and the confirmation slip are referred to as pass proof information.

In the construction of the structure, after the reinforcing bars are placed (S20), this spacer is attached to the reinforcing bars (S21), the formwork is installed, and the concrete is placed and cured in the normal structure construction procedure (S22 to S25). ). In this way, the cover thickness can be secured and the cover thickness is ready for inspection.

FIG. 5 shows a schematic diagram when the reinforcing bar cover spacer of the present invention is mounted on a reinforcing bar (S21), a formwork 40 is assembled (S22), and concrete is placed (S23). It corresponds to the front view projected from the near side in the length direction of the reinforcing bar in FIG. When the support body is rotatable with respect to the reinforcing bar, the spacer main body is in contact with the side A and the side B that are in contact with each other even if the positional relationship between the formwork 40 and the reinforcing bar changes as shown in (a) and (b). It becomes. At this time, the triangle ABC (the bottom surface of the triangular prism) formed by the C axis of the reinforcing bar central axis is always a constant shape, is unique to the reinforcing bar cover spacer, and does not depend on the formwork. The guaranteed cover thickness value L and the distance d from the mold 40 to the antenna are also held at a constant value. Even if the reinforcing bar cover spacer is attached to the reinforcing bar so as to deviate from the perpendicular direction, the position is corrected.

Thus, the antenna distance d and the cover thickness guarantee value L from the surface of the cast concrete formed on the inside of the formwork are values inherent to the cover spacer of the present invention. At the same time, when the data is written in the memory, it is possible to obtain a reinforcing bar cover spacer having a predetermined distance d from the concrete surface and an antenna parallel to the distance d and a cover thickness guarantee value L.

After installing the rebar cover spacers, formwork is installed, and concrete is placed and cured in the normal structure construction procedure (S22 to S25).

In the inspection (S26) of whether it has a predetermined cover thickness, the presence or absence of this spacer is confirmed with a reader from the surface of the structure after construction. If this spacer can be detected, it can be proved that a predetermined cover thickness is secured. The inspection result can be directly written in the internal memory of the IC tag 11 or can be written in the database in the server in association with the ID of the IC tag (S27). If a passive IC tag having no power source such as a battery is used in this system, the inspection can be performed any number of times at any time.

Therefore, if the ID can be read in the concrete inspection (S26), the cover spacer main body of the present invention does not appear on the surface of the concrete structure. It is possible to obtain an effect that it is found that the thickness is equal to or greater than the predetermined cover thickness guarantee value L. The distance d to the antenna is designed to be a distance that can be read even in concrete. If this distance cannot be read, the cover spacer itself is not embedded or has fallen off, and it is greatly inclined. In that case, a detailed inspection may be performed by a conventional inspection method.

10: Spacer body 10a: Spacer body lower part 10b: Spacer body upper part 11: IC tag 111: Antenna 20: Mounting support part 30: Reinforcing bar 40: Concrete placement formwork A: Line in contact with formwork B: Line in contact with formwork C: Rebar central axis L: Cover thickness guarantee value d: Distance to antenna

Claims (7)

Reinforcement cover spacer, characterized in that it has an attachment support part to the reinforcing bar and a spacer main part, and the spacer main part contains an IC tag. The reinforcing bar cover spacer according to claim 1, wherein the IC tag is built in d = 0.2L to 0.6L.
(Where d represents the distance between the plane including the antenna of the built-in IC tag and the virtual plane where the spacer contacts the mold, and L represents the distance from the virtual plane where the spacer contacts the mold to the surface of the reinforcing bar. Represents distance.) The reinforcing bar covering spacer according to claim 1 or 2, wherein the IC tag is incorporated so that a surface formed including the antenna of the IC tag is parallel to a surface in contact with the mold. The reinforcing bar covering spacer according to any one of claims 1 to 3, wherein the IC tag is a passive type. The reinforcing bar covering spacer according to any one of claims 1 to 4, wherein the mounting support part is slidably rotatable on the reinforcing bar. 6. The reinforcing bar covering spacer according to claim 1, further comprising a gap through which concrete flows between a virtual plane that comes into contact with the mold and the spacer main body. The reinforcing bar covering spacer according to claim 1, wherein the spacer main body is a hydraulic composition or ceramics.