WO2008066176A1

WO2008066176A1 - Method for discriminating concrete specimen

Info

Publication number: WO2008066176A1
Application number: PCT/JP2007/073240
Authority: WO
Inventors: Ken Sakamura; Takeyuki Kimijima; Masao Kusano; Tatsushi Morokuma; Jun Yamada
Original assignee: Sumitomo Osaka Cement Co., Ltd.; Ubiquitous Computing Technology Corporation
Priority date: 2006-12-01
Filing date: 2007-11-30
Publication date: 2008-06-05
Also published as: JP5089968B2; JP2008139173A

Abstract

This invention provides a method for discriminating a concrete specimen, characterized by comprising casting ready-mixed concrete into a form, burying a thin plate-like noncontact communication medium in the ready-mixed concrete through the cast ready-mixed concrete surface, hardening the cast ready-mixed concrete, demolding the hardened concrete to prepare a concrete specimen, reading information recorded in the noncontact communication medium buried in the concrete specimen in a noncontact manner with a noncontact communication medium reading device, and discriminating the concrete specimen based on the read information.

Description

Specification

Identification method of concrete specimen

Technical field

The present invention relates to a method for identifying a concrete specimen.

This application (together, December 1st, 2006, Japanese Patent Application No. 2006-326130, filed with Takako Enomoto, claims priority, and the contents thereof are incorporated herein by reference.

Background art

Conventionally, when building a concrete building or structure, an inspection for confirming the quality of the placed concrete has been performed. That is, a part of the raw concrete used for placing is extracted, and concrete specimens (concrete specimens) based on a predetermined standard 'standard are produced, and further, a predetermined curing is applied to the concrete specimen. After application, the concrete test specimen is inspected by a specified inspection organization. When preparing, curing, and evaluating the concrete specimen, it is necessary to identify the concrete specimen. . Therefore, conventionally, methods such as attaching identification information on concrete specimens, such as identification numbers and histories, to the formwork to be placed using a tag, etc., or writing to the formwork with a paint or writing instrument have been taken. ing.

[0003] This concrete specimen is usually made in a ready-mixed concrete factory or a construction site where it is delivered. If the number of concrete specimens to be produced is large due to various types of ready-mixed concrete or a large number of production lots, human error occurs when identifying concrete specimens. It may be easier and may lack accuracy in quality control. In addition, in order to recognize and match the specified concrete to be inspected with the formwork that forms the concrete specimen and the concrete specimen that has been placed, it is necessary to attach tags, paint, and writing tools to them. In addition to work such as writing in the book, it was necessary to maintain a ledger management for associating concrete, formwork, and concrete specimens, and the work was complicated and busy.

Furthermore, when the work becomes complicated in this way, illegal inspection is performed aiming at the interval. There is a possibility. For example, for the purpose of passing an inspection object that may originally be rejected to an inspection such as a strength test, the recognition information such as the identification number and history of the concrete specimen to be inspected is transferred to another concrete that is not the inspection object. It is considered that it is possible to inspect a concrete specimen that is given to the specimen and is not subject to inspection, assuming that it is a concrete specimen to be inspected.

[0004] In order to solve the above problems, a method of identifying a concrete specimen using a wireless tag that is a non-contact communication medium has been proposed (Patent Document 1).

In this method, a radio tag having a size of a pebbles in which data related to a predetermined concrete is written is prepared in advance, and the radio tag is accommodated in the concrete when molding concrete. Then, when identifying the concrete, the concrete is identified by reading the data of the wireless tag stored in the concrete with a non-contact wireless tag reader.

The above-mentioned wireless tag is inserted when ready-mixed concrete is poured halfway into the specimen formwork. And when the remaining ready-mixed concrete is poured afterwards, it will be completely embedded in the ready-mixed concrete. Further, by hardening and demolding the ready-mixed concrete, a concrete specimen in which a wireless tag is embedded can be obtained.

[0005] However, in the conventional method for identifying a concrete specimen using the above-described wireless tag, the wireless tag, which is a non-contact communication medium, is simply thrown into the ready-mixed concrete. Therefore, the position of the wireless tag and the direction in which the antenna points are not constant, and it takes time to find the position of the wireless tag when reading information using the wireless tag reader. there were. Also, since the wireless tag is simply installed inside the concrete specimen, the distance from the outer peripheral surface of the concrete specimen to the wireless tag becomes longer, and therefore the sensitivity when reading information is reduced and the reliability is poor. There was a problem.

Furthermore, since the remaining ready-mixed concrete is poured after the wireless tag is inserted, the wireless tag is damaged when pouring, due to the impact of aggregate contained in ready-mixed concrete or the impact of pouring the poured concrete with a stick. A case was considered. In other words, the identification method using a wireless tag has a problem that its reliability may be lowered. [0006] In addition, when a foreign object such as a wireless tag is embedded in the ready-mixed concrete, the size and shape of the wireless tag is about a pebbles. Different Young's modulus and strength from the wireless tag can be a factor in reducing the strength of concrete. Therefore, a concrete specimen with a structure that accommodates a wireless tag inside concrete may not be able to obtain the same test result as a concrete specimen that does not contain a wireless tag when a strength test is performed. was there.

[0007] The present invention has been made to solve the above-described problem, and can easily, accurately and reliably perform identification work without risk of human error in identification. The objective is to provide a concrete specimen identification method that can improve the efficiency of recognition work.

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2004-197312 Disclosure of Invention

Means for solving the problem

[0008] As a result of intensive studies in order to solve the above problems, the present inventors have used a thin plate-like non-contact type communication medium instead of a conventional pebble-like non-contact type communication medium. Furthermore, when the ready-mixed concrete is placed in the formwork, the position of the non-contacted communication medium is kept constant by embedding the thin plate-like non-contact communication medium from the cast-in surface of the ready-mixed concrete. Therefore, it has been found that the identification work can be performed simply, accurately and reliably, and contributes to the efficiency of the recognition work, and the present invention has been completed.

[0009] That is, in the method for identifying a concrete specimen of the present invention, ready-mixed concrete is placed in a formwork, and then a non-contact communication medium in the form of a thin plate is formed from the ready-made face of the ready-mixed concrete. Then, the ready concrete is cured and demolded into a concrete specimen, and then the information recorded in the noncontact communication medium of the concrete specimen is read using a noncontact communication medium reader. It is characterized by having a step of reading in a non-contact manner and identifying the concrete specimen based on the read information.

[0010] In the concrete specimen identification method of the present invention, the distance between the antenna portion of the non-contact communication medium and the surface (measurement surface) of the concrete specimen is preferably within 3 cm. That's right.

As described above, by setting the distance between the antenna part of the non-contact communication medium and the surface of the concrete specimen to be within 3 cm, the sensitivity of the antenna when reading information becomes higher and the reliability is improved. .

[0011] In the concrete specimen identifying method of the present invention described above, it is preferable that the position of one end of the non-contact communication medium substantially coincides with the placement surface of the ready-mixed concrete.

The position of the non-contact communication medium in the ready-mixed concrete can be set constant by making the position of the one end portion of the non-contact communication medium substantially coincide with the placement surface of the ready-mixed concrete. This makes it extremely easy to specify the position of the non-contact communication medium when reading the non-contact communication medium force information. Note that the position of the one end refers to at least one surface and / or side of the non-contact communication medium and substantially coincides with the surface and / or side of the non-contact communication medium. It means that it is close to or very close to it, that it exists in the position! /, That it is, that it is exposed! /, That it is exposed.

[0012] In the method for identifying a concrete specimen according to the present invention, the non-contact communication medium preferably has a length of 120 mm or less and a width of 30 mm or less! /.

As a result, the non-contact communication medium is preferable because it does not affect the strength test result of the concrete specimen. Also, when embedding a non-contact communication medium, the opportunity to contact the aggregate in the ready-mixed concrete is reduced, and the embedding work is simplified.

[0013] In the method for identifying a concrete specimen of the present invention, the non-contact communication medium includes an integrated circuit and an antenna unit capable of writing / reading information on a substrate made of a flexible organic polymer. It is preferable that it is provided.

In this way, by configuring the non-contact communication medium using a flexible organic polymer, the shape of the non-contact communication medium is not affected by deformation of the ready-mixed concrete even when the ready-mixed concrete is cured. It can follow and eliminates the possibility of cracks or voids between ready-mixed concrete and non-contact communication media.

In addition, there is no possibility that the strength of the concrete will decrease due to cracks and voids, and even if the strength test is performed, the non-contact communication medium will not be embedded! /, The test result equivalent to that of the concrete specimen will be can get. Note that the writing / reading can be selected according to need, either writing and / or reading.

[0014] In the concrete specimen identifying method of the present invention, the integrated circuit and the antenna section are preferably covered with a film made of an organic polymer.

In this way, by covering the integrated circuit and the antenna part with the film made of organic polymer, the integrated circuit and the antenna part are protected by the organic polymer even when the ready-mixed concrete is cured. Damage is less likely to occur.

[0015] In the concrete specimen identifying method of the present invention, the information recorded in the non-contact communication medium is preferably identification information of the ready-mixed concrete.

Thus, by using the information recorded on the non-contact communication medium as the identification information of the ready-mixed concrete, the information is read in a non-contact manner using a non-contact communication medium reader, and the concrete specimen It is possible to easily know the composition, characteristics, history, etc. of the ready-mixed concrete used in the process.

[0016] In the concrete specimen identifying method of the present invention, the non-contact communication medium reading device performs both reading of information from the non-contact communication medium and writing of information of the non-contact communication medium. A portable non-contact communication medium reading / writing device is also preferable.

In this way, the portable non-contact communication medium reading / writing device that performs both reading of information from the non-contact communication medium and writing of information of the non-contact communication medium. By doing so, it becomes possible to know the composition, characteristics, history, etc. of the ready-mixed concrete used in the concrete specimen in real time on the spot.

The invention's effect

[0017] In the method for identifying a concrete specimen of the present invention, a non-contact communication medium in the form of a thin plate is embedded in the ready-mixed concrete from the surface where the ready-mixed concrete is placed. The position can be made substantially constant from the placement surface. As a result, the position of the non-contact communication medium is specified when reading information from the non-contact communication medium. It becomes easy to do. In addition, since the non-contact communication medium is located near the placement surface of the concrete specimen, the sensitivity of the antenna when reading information is increased and the reliability is improved. That is, information reading and identification can be performed accurately, reliably and stably, and the reliability of information reading and identification can be improved. In addition, by placing the non-contact communication medium in the ready-mixed concrete after placing the ready-mixed concrete, the non-contact communication medium can be damaged by the impact applied by the aggregate contained in the ready-mixed concrete. There is no risk of lowering reliability.

[0018] According to the method for identifying a concrete specimen of the present invention, the non-contact communication medium can be embedded manually without requiring a special jig or the like.

In addition, since the non-contact communication medium is embedded in the ready-mixed concrete after placing the ready-mixed concrete, the non-contact communication medium impacts with the aggregates when the ready-mixed concrete is poured, or the cast concrete is struck with a stick. Damage can be prevented, and the reliability of identification can be improved.

Brief Description of Drawings

FIG. 1 is a perspective view showing an IC tag used in a method for identifying a concrete specimen according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the tag of FIG. 1 along the AA spring.

FIG. 3 is a cross-sectional view showing a method for identifying a concrete specimen according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a concrete specimen of one embodiment of the present invention.

FIG. 5 is a schematic view showing an apparatus provided with a sensor according to an embodiment of the present invention.

FIG. 6 is a schematic view showing an apparatus provided with a sensor according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0020] The best mode for carrying out the method for identifying a concrete specimen of the present invention will be described below.

This embodiment is specifically described in order to better understand the gist of the invention, and does not limit the present invention unless otherwise specified.

[0021] The method for identifying a concrete specimen according to the present invention includes placing a ready-mixed concrete in a formwork, and then placing a thin plate-like non-contact communication medium from the ready-mixed surface of the ready-mixed concrete. Then, the ready-mixed concrete is hardened and demolded into a concrete specimen, and then the information recorded in the non-contact communication medium of the concrete specimen is read using a non-contact communication medium reader. This is a method of non-contact reading and identifying the concrete specimen based on the read information.

Next, a method for identifying the concrete specimen will be described in detail with reference to the drawings.

Yes

First, a thin-plate IC tag (non-contact communication medium) is prepared.

FIG. 1 is a perspective view showing an IC tag (non-contact communication medium) used in the method for identifying a concrete specimen according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG. is there. In these figures, for ease of explanation, individual thicknesses, aspect ratios, etc. are changed from actual ones.

The IC tag 1 has a thin plate shape, and has a substrate 2 made of a flexible organic polymer, an IC (integrated circuit) 3 capable of writing / reading information, and an IC 3 around the IC 3. An oblong and spiral antenna section 4 is provided so as to surround the antenna. The substrate 2, IC3, and antenna unit 4 are entirely covered with a film 5 made of an organic polymer such as a laminate film.

The IC tag 1 may be either an active type or a passive type as long as it is a thin plate. Force The passive type is used from the viewpoint that it is easy to make it a predetermined thin plate shape, and that the IC tag is discarded after a strength test. preferable.

The substrate 2 is not particularly limited as long as it has a function as a support that supports the IC 3 and the antenna unit 4. An organic polymer film is preferable in that it has moderate flexibility but has moderate flexibility and is easy to handle. As the organic polymer film, for example, a plastic film such as polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), polycarbonate (PC) is preferably used. Polyethylene terephthalate (PET) film is preferred because of its excellent thermal stability!

The shape of the substrate 2 may be set in accordance with the shapes of the IC 3 and the antenna unit 4 and is not particularly limited. For example, square, rectangle, circle, ellipse, trapezoid, rhombus, etc. as required Preferred form can be selected. However, the rectangular shape is preferable because it is easy to handle when embedded in ready-mixed concrete.

[0024] The IC3 is not particularly limited as long as it can write / read the identification information on the concrete specimen. In order to prevent falsification of identification information, etc., it is preferable to use an IC that cannot erase or overwrite already written identification information and can write only the additional part of identification information.

[0025] The identification information on the concrete specimen is not limited at times, but examples include the following items.

(1) Date of preparation of concrete specimens, name of factory that produced ready-mixed concrete, production lot number, etc. (2) Quality of ready-mixed concrete (slump, air content, chloride ion content, kneading temperature, etc.), (3) Raw material of ready-mixed concrete (aggregate production area, type, density, etc.), (4) ready-mixed concrete composition (material type, mixing ratio), (5) ready-mixed concrete supplier, delivery time, unloading time, (6 ) Compressive strength (test date, test data, etc.), (7) Other items determined by specifications, etc.

The antenna unit 4 is not particularly limited as long as the object of the present invention can be achieved. For example, as shown in FIG. 1, a metal thin film or metal foil etched into an ellipse with a predetermined size and a spiral shape can be used.

The film 5 covers the entire substrate 2, IC3 and antenna part 4 and is protected from the external environment. A film having good adhesion with concrete is preferable because it does not affect the strength test of the specimen. For example, a laminate film is preferable. In particular, a laminated film consisting of multiple layers is preferred because of its high strength.

As this laminate film, for example, a plastic film such as polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), polycarbonate (PC) is preferably used. Polyethylene terephthalate (PET) film is preferred because of its excellent thermal stability. The laminate structure of the laminate structure may be a laminate of films of different materials, or may be a laminate of different materials with the same material.

[0027] The IC tag 1 has a length of 120 mm or less and a width of 30 mm or less, more preferably 80 mm or less, a width of 27 mm or less, and more preferably a length of 60 mm or less and a width of 25 m. m or less. The lower limit is not specified here, but generally there is much demand for small items.

If the size of the IC tag 1 is within the above range, the strength test result of the concrete specimen will not be affected. In addition, when the IC tag 1 is inserted, there is less chance of contact with the aggregate in the ready-mixed concrete, and the embedding work is simplified.

The size of the IC tag 1 is the size excluding the film 5 when the film 5 is not covered, and the size of the concrete specimen including the film 5 when the film 5 is covered. This is the size of the part embedded inside.

[0028] The IC tag 1 is not deteriorated due to moisture and alkali contained in the concrete to be placed, and moisture entering the concrete from the outside during water curing after demolding. It is preferable to use it. It is preferable to perform waterproofing and alkaliproofing treatments, for example, the whole is preferably covered with a film 5 made of an organic polymer such as a laminate film. As another method, the integrated substrate 2, IC 3, and antenna unit 4 may be stored in a sealed container such as a plastic bag or ceramic.

Further, as the substrate 2, IC 3 and antenna section 4, those having durability against moisture and alkali contained in concrete, moisture entering the concrete from the outside during underwater curing, and the like may be used.

[0029] Next, as shown in FIG. 3, a concrete specimen form 11 in which the bottomed cylinder is halved along the axis (actually cylindrical. In FIG. 3, the halved shape is used for explanation. The ready-mixed concrete 12 is cast into the ready-mixed concrete 12, and then the IC tag 1 is embedded in the ready-mixed concrete 12 from the cast surface 12 a of the ready-mixed concrete 12.

The shape and size of the concrete specimen are not particularly limited and may be selected as necessary. Specific examples include shapes such as a cylinder, a semi-cylinder, and a quadrangular column.

The IC tag 1 is embedded in the ready-mixed concrete 12 with the antenna part 4 of the IC tag 1 parallel to the inner surface 11a of the opposite form 11 or inclined with respect to the inner surface 11a.

Yes

[0030] Considering the sensitivity and stability during writing / reading of the IC tag 1, it is preferable that the antenna surface of the antenna part 4 of the IC tag 1 is parallel to the inner surface 1 la of the mold 11! / ,. Also, when the antenna surface of the antenna part 4 of the IC tag 1 is embedded in an inclined state with respect to the inner surface 11a, the sensitivity and stability at the time of writing / reading of the IC tag 1 are taken into consideration. The antenna surface of the antenna part 4 is preferably within 45 ° with respect to the inner surface 11a, more preferably within 30 °.

[0031] It is preferable that the entire antenna surface of the antenna part 4 of the IC tag 1 is located in a region within 3 cm from the inner surface 11a of the mold 11, more preferably in a region within lcm. It is. In other words, it is preferable that the entire antenna surface of the antenna portion 4 of the IC tag 1 is located within a region within 3 cm, preferably within a region within 1 cm from the side surface of the concrete specimen. The lower limit of the distance is preferably 0 or more, and can be selected as necessary as long as it does not easily peel off or fall off. The number of the non-contact communication media is preferably one, but may be one or more, such as two in some cases.

Yes

By setting the embedding position of the entire antenna surface of the IC tag 1 within an area within 3 cm from the inner surface 11a of the mold, the antenna surface of the IC tag 1 is three-dimensional with respect to the inner surface 11a of the mold 11. Regardless of which direction it is tilted, the sensitivity and stability at the time of writing / reading the identification information are improved.

The embedded depth of the IC tag 1 from the placement surface may be a depth that is fixed to the concrete specimen when the ready-mixed concrete 12 placed on the mold 11 is cured. During the strength test, the top surface of the concrete specimen is either caved or polished (eg, Japanese Industrial Standards JIS A 1132 “How to make a concrete specimen for strength testing”). Les, preferred to embed to a degree of depth.

On the other hand, if it is embedded too deeply, the IC tag 1 may be damaged or deteriorated, resulting in a problem that the stability of the signal and the workability are lowered.Therefore, the upper end of the IC tag 1 or the upper end of the antenna unit 4 is It is preferable to embed the raw concrete 12 to a depth of about 0 mm to 50 mm, more preferably about 5 mm to 20 mm, more preferably about 10 mm;

[0033] This IC tag 1 is used to facilitate embedding in the placing surface 12a of ready-mixed concrete 12.

When 1 is embedded to a predetermined depth, only the edge of the substrate 2 protrudes from the placement surface 12a. In addition, it is possible to keep only the substrate 2 long.

At this time, if a mark indicating the position to be embedded at the end of the substrate 2 is put in accordance with the desired embedding depth, the IC tag 1 can be easily reached to a predetermined depth without variations among concrete specimens. Can be embedded.

The end portion of the substrate 2 protruding from the placement surface 12a may be subjected to post-cutting caving, which is preferably cut easily if necessary after the ready-mixed concrete 12 is cured.

[0034] When the IC tag 1 is used while being wrapped, when the IC tag 1 is embedded from the placement surface 12a to a predetermined depth, only a part of the wrapping protrudes from the placement surface 12a. Certain parts of the rubbing can be lengthened. Again, if a mark indicating the position to be embedded is added to the long wrapping part according to the embedding depth, the IC tag can easily reach the specified depth without variations in the depth of each concrete specimen. Embed 1 with power S.

The wrapping portion protruding from the placing surface 12a may be subjected to post-cutting caving which is preferably cut easily if necessary after the ready-mixed concrete 12 has hardened. Further, a cut may be provided so as to facilitate cutting.

The same applies to wrapping when using IC tags in bags and other containers.

The IC tag 1 may be pre-written with identification information related to predetermined ready-mixed concrete before placing. Also, after the IC tag 1 is embedded in ready-mixed concrete 12 The identification information regarding the link may be written. In addition, a predetermined ID may be written in the IC tag 1 in advance, or a predetermined ID may be written after the IC tag 1 is embedded in the ready-mixed concrete 12.

Next, the ready-mixed concrete 12 is hardened and demolded, and then subjected to underwater curing at a specified temperature for a specified time to obtain a concrete specimen. The temperature and time may be set as necessary.

As a result, the concrete specimen shown in Fig. 4 is obtained.

In this concrete specimen, the antenna surface force of the antenna portion 4 of the IC tag 1 is made substantially parallel to the outer peripheral surface 13a of the concrete body 13. Therefore, when writing / reading identification information The sensitivity and stability are improved.

[0037] Next! /, The information recorded in the IC tag 1 of this concrete specimen will be displayed as an IC tag reader / writer.

Using a non-contact communication medium writing / reading device, it is read in a non-contact manner, and the concrete specimen is identified based on the read information.

The IC tag reader / writer is not particularly limited, but a portable one is preferred. The reason is that information can be easily written / read at the work site without moving heavy concrete specimens.

[0038] Particularly in a ready-mixed concrete factory or construction site, it is necessary to prepare a large number of concrete specimens every day and store them for a predetermined period. For this reason, it is difficult to move the concrete specimen far from the storage location, read the information on the IC tag 1 and identify the concrete specimen. In such cases, using a portable IC tag reader / writer, the specimen can be easily identified on site.

In addition, in order to prevent falsification of information on IC tag 1, it is preferable that the written information cannot be modified on the system and only information can be added.

As described above, it is possible to easily attach the IC tag 1 to a predetermined embedding depth without variation among specimens. Therefore, the accuracy and reliability of the test results obtained for each specimen can be improved, and workability can be improved.

A method other than using a portable IC tag reader / writer may be selected as necessary. For example, a method may be used in which a concrete specimen is brought close to a device in which a sensor is installed. The condition of the surface on which the sensor is installed can be selected as necessary, and it may be a flat surface or a curved surface, or may be a vertical, inclined surface or horizontal surface. The installation conditions such as the position of the sensor can be selected as necessary, and the number of sensors can be selected as needed, such as one or more.

As a specific example of the above method and apparatus, a concrete specimen is identified by reading the information of IC tag 1 by preparing and using a device in which a plurality of sensors that read the information of IC tag 1 are installed on a plate-shaped table. In this case, the specimen can be easily identified by simply rolling the concrete specimen on it. As a result, the information of the IC tag 1 can be easily read without specially searching for the location of the IC tag 1. For example, reading as shown in Figure 5 A scraping device 14 can be prepared and used. The device 14 is provided with a protective sheet 15, a sensor part 16, a monitor unit 17, and a guide 18. As a specific example of the size, the width of the sensor part 16 is preferably a width that facilitates reading, for example, the same width as the specimen. For example, when the concrete specimen is a cylinder having a diameter of 100 mm and a length of about 200 mm, the width of the part where the specimen is rolled is preferably 200 mm or more, and the length is preferably 320 mm or more. If the position of the IC tag is clear to some extent, the width of the sensor unit 16 can be set as needed, and may be set to 100 mm, for example.

As another specific example of the device, a sensor for reading or writing information on the IC tag 1 can be used by changing the shape of a plurality of plate-like members. For example, as shown in FIG. 6, a member 16A in which a plate having a plurality of sensors is formed in a ring shape, a member 16B in a square shape, or a member 16C in a cap shape is prepared and used, so By simply passing or placing these items on top of the test specimen, the information on IC tag 1 can be easily read or written without specially searching for the location of IC tag 1.

Yes

[0039] Next, two examples of concrete management methods will be described as application examples of the concrete specimen identification method of the present invention.

[0040] (Management method 1)

(1) Write specific information on concrete to IC tag via IC tag reader / writer. This information can be written before or after embedding in the concrete specimen. As the writing method, the following methods can be mentioned.

a) Input specific information on concrete into the IC tag reader / writer and write it on the IC tag.

b) Input specific information on concrete into a server, personal computer, etc., send it to an IC tag reader / writer wirelessly, etc., and write it to the IC tag.

(2) The concrete specimen embedded with the IC tag is stored (demolded, cured, etc.) for a specified period and in a specified atmosphere.

(3) Take a concrete specimen of the specified age and use the IC tag reader / writer to read the IC tag information (4) Conduct a strength test on the identified concrete specimens of the specified age, and associate the test results with the data read by the IC tag reader / writer from the IC tag. Send to.

(5) Manage the information in (4) with a personal computer that stores the information in (4).

In addition, the concrete specimen of a predetermined age may be identified after the strength test.

[0041] According to this management method 1, the following effects can be obtained.

(I) Work such as writing letters, numbers, etc. on the formwork is no longer necessary, and work efficiency can be improved. In addition, inconsistencies between concrete and form number due to mistakes will be resolved, and the reliability of the test will be improved.

(Iii) When the formwork is removed, it is no longer necessary to transfer letters, numbers, etc. to the concrete specimen, and work efficiency can be improved. In addition, the mismatch between the concrete and the specimen due to a transcription mistake is eliminated, and the reliability of the test is improved.

[0042] (III) Use a force S to identify a specific concrete specimen simply, accurately and reliably with an IC tag reader / writer.

In particular, if the IC tag reader / writer is a portable IC tag reader / writer, the information on each specimen is directly read from the IC tag, so that it is necessary immediately without exchanging information with the server. Can grasp the information.

(IV) If the IC tag reader / writer and Sano, personal computer, etc. are connected by radio, etc., concrete data (quality, material, etc.) placed on the specified concrete specimen will be easily confirmed via ID. That's the power S.

(V) Data related to identification information can be easily saved and written.

[0043] (Management method 2)

(1) Save the specified information on concrete to sano, PC etc.

(2) Write the ID number to the IC tag. You can write this ID number before or after embedding in concrete specimens!

(3) Associate the information described in (1) with the ID number written on the IC tag. The correspondence between the information described in (1) and the ID number may be before or after embedding the concrete specimen. (4) Store concrete specimens with embedded IC tags in a specified atmosphere for a specified period (demolding, curing, etc.).

(5) Take out a concrete specimen of the specified age and read the ro information of the ic tag with an ic tag reader / writer to identify it.

[0044] (6) Conduct a strength test on the identified concrete specimen of a specified age, and send the test results and ID number data to a sano, personal computer, etc. that stores the information in (1) above. (7) Manage the information in (1) and (6) in correspondence with the information in (1) and (6) based on the ID number on the server, personal computer, etc. that saved the information in (1) and ½).

This management method 2 can achieve the same effects as the management method 1 described above. Example

The concrete specimen identification method according to the present invention will be described with reference to examples.

The IC tag was a rectangular passive IC tag with a total length of 3.2 cm, a width of 1.5 cm, and a thickness of 0.3 mm.

This IC tag was laminated from both sides with a polyester film. The shape after lamination is

It was a rectangle with a length of 6 · Ocm, a width of 2 · lcm, and a thickness of 0 · 6mm.

Concrete information about ready-mixed concrete to be placed was written on this IC tag with a portable IC tag reader / writer.

[0046] Ready-mixed concrete was placed in each of three molds based on Japanese Industrial Standards JIS A 1132 "How to make a specimen for concrete strength test".

After the placement, the IC tag in which the above data was immediately written on the two concretes was inserted into the ready-mixed concrete from the placement surface by a human hand so as to be vertical. At this time, it was embedded so that the antenna part of the IC tag was parallel to the length direction of the specimen, that is, to the vertical surface (side face) of the specimen.

There are two types of IC tag embedding positions: lcm and 3cm from the inner surface of the mold (the side of the concrete specimen). In other words, a specimen with two types of IC tags embedded was prepared. In both cases, the IC tag was embedded so that the upper end of the tag was 0.5 cm deep from the placement surface. No IC tag was embedded in the remaining concrete.

[0047] After 1 day after placing, the mold was removed, and the upper surface of the obtained concrete specimen was cabled. Thereafter, this concrete specimen was cured underwater for 28 days. Before carrying out the compressive strength test of this concrete specimen, the IC tag reader / writer was used to read the IC tag information, and it was confirmed that the first written information could be read.

After the compressive strength test, the IC tag information read by the IC tag reader / writer and the results of the compressive strength test were stored on the server and compared. As a result, no significant difference was observed in the compressive strength of the three specimens, and it was found that embedding an IC tag did not affect the compressive strength test.

Industrial applicability

A concrete specimen that can perform identification (concrete traceability) work easily, accurately and reliably without the risk of human error in identification, and can improve the efficiency and efficiency of recognition work. Provides a method for identifying

Claims

The scope of the claims

[1] Place concrete in the formwork,

From the surface of the ready-mixed concrete, a thin non-contact communication medium is embedded in the ready-mixed concrete,

Next, in the process of hardening and demolding this ready-mixed concrete to make a concrete specimen, and using the non-contact communication medium reader, the information recorded on the non-contact communication medium of this concrete specimen is A method for identifying a concrete specimen, comprising: a step of non-contact reading and identifying the concrete specimen based on the read information.

[2] The method for identifying a concrete specimen according to claim 1, wherein the distance between the antenna portion of the non-contact communication medium and the surface of the concrete specimen is within 3 cm.

[3] The method for identifying a concrete specimen according to claim 1, wherein a position of one end of the non-contact communication medium substantially coincides with a placement surface of the ready-mixed concrete.

[4] The method for identifying a concrete specimen according to claim 1, wherein the non-contact communication medium has a length of 120 mm or less and a width of 30 mm or less.

[5] The non-contact communication medium is characterized in that an integrated circuit and an antenna unit capable of writing / reading information are provided on a substrate made of a flexible organic polymer. The method for identifying a concrete specimen according to Item 1.

6. The method for identifying a concrete specimen according to claim 1, wherein the integrated circuit and the antenna portion are covered with a film made of an organic polymer.

7. The concrete specimen identification method according to claim 1, wherein the information recorded in the non-contact communication medium is identification information of the ready-mixed concrete.

[8] Sub-step of storing the identification process information on the server on the server, and identification of the ready-mixed concrete stored on the non-contact communication medium. Including sub-processes corresponding to information,

2. The concrete specimen identification method according to claim 1, wherein the information recorded in the non-contact communication medium is an ID number of the ready-mixed concrete.

[9] The non-contact communication medium reading device reads information from the non-contact communication medium. 2. The method for identifying a concrete specimen according to claim 1, wherein the apparatus is a portable non-contact communication medium reading / writing device that performs both writing of information on the non-contact communication medium.

[10] Place concrete in the formwork,

Next, from the cast-in surface of the ready-mixed concrete, the thin plate-like non-contact communication medium having the antenna part is placed so that the upper end of the non-contact communication medium or the upper end of the antenna part is 5 mm to 20 mm from the cast-in surface of the ready-mixed concrete And embedded so that the distance between the antenna surface of the antenna part of the non-contact communication medium and the side surface of the placed concrete is within 3 cm, and then this ready-mixed concrete is hardened and demolded to form concrete. A method for producing a concrete specimen as a specimen.

[11] The length of the non-contact communication medium is 120 mm or less, the width is 30 mm or less, and the thickness is 3 mm or less. The method for producing a concrete specimen according to claim 10, wherein is greater than 0 and within lcm.

[12] A concrete specimen manufactured by the method for producing a concrete specimen according to claim 10.

Yes