JP6751630B2 - Quality control method for concrete - Google Patents

Description

The present invention relates to a concrete quality control method.

In a ready-mixed concrete plant, as a quality control test for ready-mixed concrete, a plant test is conducted to measure properties such as slump value, air content, chloride content, and unit water content, and the test data is stored in a computer and stored in a database. .. Further, a compressive strength test is performed on the hardened concrete. For example, the strength for 1 week and the strength for 4 weeks are measured, the test data is stored in a computer, and a database is similarly created.

At the construction site where ready-mixed concrete is placed, the construction manager calls the plant to check the quality control test results of ready-mixed concrete at any time, but depending on the site environment, the telephone signal condition may be poor or the telephone line may be crowded. It often takes time to confirm the quality control test results in the plant due to problems such as not being connected.

In such a case, the quality control of ready-mixed concrete may be neglected, or the predetermined instruction from the construction site to the plant may be delayed, which may hinder accurate site management.

Therefore, there is an urgent need to develop a confirmation method that does not require the construction manager to confirm the quality control test results of ready-mixed concrete by telephone to the plant.

On the other hand, even at the construction site where ready-mixed concrete is brought in, on-site tests such as slump value are conducted under the construction manager.

As a result of the field test, the degree of hardness of the ready-mixed concrete was notified to the plant by telephone, and the plant used the feedback information for the subsequent production of ready-mixed concrete, but as mentioned above, it was not possible to exchange information by telephone. As mentioned above, there are inherent issues that need to be improved because it takes time and effort.

In the quality control of ready-mixed concrete, the exchange of character data represented by numerical values and characters is generally exchanged between the plant and the construction site. For example, if only the slump value is measured in the slump test. However, it is unclear what the properties and shape of the test piece are. In addition, although 1.5 to 1.8 times the slump value may be recommended as the standard for slump flow, the state of ready-mixed concrete when it spreads (coarse aggregate is evenly present in the entire range). It is difficult to judge whether the quality of concrete is good or bad only by numerical values.

In this way, the quality control of ready-mixed concrete cannot be accurately controlled only by numerical values, etc., and it is necessary to manage the visual properties, etc. Therefore, especially for construction managers who have little experience in construction management, the quality of ready-mixed concrete It is extremely difficult to accurately judge whether it is good or bad.

Here, in Patent Document 1, specific data is displayed on a display (display means) of a personal computer which is an information processing device, an object related to this data is photographed to create photographic data, and this photographic data is used. Various data that are input to a personal computer and recorded by associating specific data with photographic data and transmitting these data to a host computer and a method of recording photographic data related thereto are disclosed.

Japanese Unexamined Patent Publication No. 2003-075433

According to the method of recording various data described in Patent Document 1 and photographic data related thereto, it is possible to save the trouble required for associating the various data with the photographic data, and to obtain various data unrelated to each other due to human error. It is said that it can prevent the photo data from being associated.

That is, by associating the character data with the image data related thereto and converting it into data and accessing the host computer, both the character data and the image data related thereto can be confirmed, and the host can be confirmed from both the construction site and the plant. By accessing a computer, it is possible to eliminate the need for information exchange over the phone. Furthermore, since there is image data related to this in addition to the character data, it is assumed that quality control can be easily performed.

However, the image data referred to in Patent Document 1 is an image of only the state of the test equipment and ready-mixed concrete at the time of the actual quality control test, and from this image, it is a good quality ready-mixed concrete (for example, in the slump test). It is difficult to easily understand that the slump value and shape of the ready-mixed concrete are good, etc.), and this is even more remarkable for construction managers who have little experience in construction management.

The present invention has been made in view of the above problems, and both the ready-mixed concrete plant and the construction site can easily share the concrete test results without exchanging information by telephone or the like, and further, construction management. The purpose is to provide a concrete quality control method that allows even inexperienced construction managers to easily and accurately judge the quality of ready-mixed concrete.

In order to achieve the above object, the concrete quality control method according to the present invention uses a plant communication device in a plant to transmit at least concrete plant test image data to a host computer, and uses a site communication device in a construction site. At least the site test image data of concrete is transmitted to the host computer, and at least the plant and the construction site access the host computer via the plant communication device and the site communication device and store the data in the host computer. It is a concrete quality control method for confirming the test image data that has been performed, and in the host computer, the plant test standard image data that serves as a criterion for determining the pass / fail of the test result in the plant and / or the construction work. The site test standard image data, which is the criterion for judging the pass / fail of the test result at the site, is stored, and when the host computer is accessed, the test image data and the test standard image data are compared to perform quality control of concrete. Is.

In the concrete quality control method of the present invention, the plant and the construction site send their respective concrete test data to a common host computer, and both sides access the host computer to check the concrete test data. Both sides can share the test results of concrete without exchanging information by telephone or the like, and it is possible to confirm the test results immediately when they want to confirm.

Here, "at least send the concrete plant test image data to the host computer" means that the data to be transmitted is only the concrete plant test image data, and in addition to this, the concrete plant test image by the plant communication device. There is plant test character data obtained by extracting the character data in the data. In addition, "at least concrete field test image data" means that the data to be transmitted is only concrete field test image data, and in addition to this, character data in the concrete field test image data is extracted by the field communication device. There is field test character data that has been created. These test character data are text data, and the character data extracted by the character conversion application (application) built in the plant communication device or the field communication device is converted into text data.

Further, the plant test standard image data which is the judgment standard of the pass / fail of the test result in the plant and the site test standard image data which is the judgment standard of the pass / fail of the test result at the construction site are stored in the host computer in advance.

In this way, the test image data is transmitted to the host computer, and the plant or construction site can access the host computer to check the test image data. Therefore, the test contents can be easily grasped and the credibility of the test results is guaranteed. can do. Then, the test standard image data, which is the criterion for judging the pass / fail of the test result, is referred to in the host computer, and the plant or the construction site can visually check the test image data and the test standard image data and compare them. Therefore, for example, construction management experience. Even inexperienced construction managers and inexperienced plant managers can easily and accurately judge the quality of ready-made concrete.

The host computer is, for example, on a cloud server. Further, the plant communication device and the field communication device may be in any form such as a personal computer, a smartphone, a tablet terminal having at least a communication means and an imaging means, and for example, any device to which the Internet and a WEB camera can be applied. The form and model do not matter.

Here, the plant test character data and the field test character data extracted from the test image data include a slump value, an air amount, a chloride content, a unit water amount, and the like, and the test character data includes numerical values, characters, and Includes general graphs, etc. In addition, the plant test image data and the field test image data include a slump test situation photograph, an air amount and chloride ion concentration measurement situation photograph, and the like. Further, in addition to these test data of ready-mixed concrete, for example, compressive strength test results regarding 1-week strength and 4-week strength of concrete, compression test status photographs, and the like are also included in the plant test character data and the plant test image data.

Regarding the slump properties of ready-mixed concrete, it is not possible to accurately judge whether it is good or bad only by the slump value and the slump flow value, which are test character data. For example, even if the slump value is the same, a part of the slump may be rough, or the shape of the slump may indicate the properties of the slump. Furthermore, even if the slump flow value is the same, the same slump flow value can be obtained when the coarse aggregate remains in the center and does not move to the outer peripheral portion and when it moves evenly as a whole. May be shown.

Therefore, by checking not only the slump value and the slump flow value but also the test image data, it is possible to clearly judge whether the slump property is good or bad. Then, as the test standard image data that serves as a criterion for judging the quality of the slump, the optimum image data is selected from the past image data that the plant, the construction site, the construction company, etc. have, and the test is performed. By comparing the image data with the test reference image data, even an inexperienced manager or the like can easily and accurately judge whether the slump property is good or bad.

Also, regarding the compression test, confirming the fracture status of the specimen with image data will lead to confirmation of the quality of the coarse aggregate. Furthermore, the factors that cause the failure condition to be bad include that the flatness of the upper surface of the specimen is not appropriate and that an eccentric load is acting on the specimen, but whether the fracture condition is good or bad depends on the test image data and the test reference image data. By making a comparative judgment, the necessity of retesting can be examined.

Further, as another embodiment of the concrete quality control method according to the present invention, the test image data and the test reference image data are automatically compared in the host computer, and the test image data is rejected. An example may be mentioned in which an alarm is notified to the plant communication device and / or the field communication device when the determination is made.

For example, using image software stored in the host computer, the test image data related to the slump flow and the test reference image data are superimposed, a certain threshold is set for the difference value between the two, and the difference value exceeds the threshold value. In some cases, the test image data may be rejected. Further, in the specimen after the compression test, the angle and number of fracture cracks appearing on the side surface of the specimen are read by image software or the like, and a certain threshold value is set for the angle and number of fracture cracks to set the angle and number of fracture cracks. If the number does not satisfy the threshold value, the test image data may be rejected.

According to the quality control method of the present embodiment, the quality control can be automated, and the labor of management by the construction manager or the like can be saved.

Further, as another embodiment of the concrete quality control method according to the present invention, the strength test date of concrete is stored in the host computer, and on the strength test date, the plant communication device and the field communication device have. Examples thereof include a form in which the strength test date is notified.

By notifying the plant or construction site of the concrete strength test date (for example, 1-week strength test date, 4-week strength test date, etc.) from the host computer, it is possible to prevent forgetting the test.

Further, the X-R control chart may be created in the host computer based on the plant test character data and the field test character data.

According to the concrete quality control method of the present invention, the plant and the construction site transmit their respective concrete test data to a common host computer, and both sides access the host computer to check the concrete test data. Both construction sites can share the concrete test results without exchanging information by telephone or the like, and can immediately confirm the test results when they want to confirm.

In addition, test image data and test character data are transmitted and stored in the host computer, and test standard image data, which is a criterion for judging the pass / fail of the test result, is stored in the host computer in advance, so that the plant or construction site can be tested. Since the test image data can be confirmed in addition to the character data, the test contents can be easily grasped and the credibility of the test results can be guaranteed.

Further, by comparing the test image data with the test reference image data, even an inexperienced manager or the like can easily and accurately judge whether the slump property is good or bad.

It is a schematic diagram explaining the embodiment of the quality control method of concrete of this invention. It is a schematic diagram which showed the plant test character data and the plant test image data related thereto in a host computer. It is a figure which showed the test reference image data (good example and bad example) about a slump property. It is a figure which showed the test reference image data (good example and bad example) about the fracture state of the specimen in a compression test. It is the figure which showed the XR control chart (X ^bar control chart and R control chart) created by a host computer.

Hereinafter, embodiments of the concrete quality control method of the present invention will be described with reference to the drawings. In the quality control method shown in the figure, information is shared between the plant and the construction site, but in addition to these, the head office and branches of the construction company that controls the construction site, design managers, construction orderers, etc. are also hosted. It may be in a form in which the computer can be accessed and necessary information can be transmitted to the host computer via a communication device.

(Implementation of concrete quality control method)
FIG. 1 is a schematic view illustrating an embodiment of the concrete quality control method of the present invention. The quality control method of the present invention includes the host computer 1 shown in FIG. 1, a plant communication device 2 in a ready-made concrete plant capable of transmitting data to the host computer 1 and visible data in the host computer 1, and a construction site. This is a method of performing quality control using the on-site communication device 3 in the above.

Here, the host computer 1 is on a cloud server, and the plant communication device 2 and the field communication device 3 are composed of a tablet terminal or the like provided with at least communication means and imaging means.

In the ready-mixed concrete plant, the plant communication device 2 is used to image the concrete plant test image data 4A and 5A (Y1 direction and Y2 direction), and the plant communication device 2 is used to capture the plant test image data 4A and 5A. The character data of is extracted, and the character data is converted into the plant test character data by the character conversion application (application) built in the plant communication device 2, and the plant test image data 4A and 5A and the plant test character data are converted into the host computer 1. (X1 direction).

On the other hand, at the construction site, the site communication device 3 is used to image the concrete site test image data 4B and 5B (Y3 direction, Y4 direction), and the site communication device 3 is used to capture the site test image data 4B and 5B. The character data of is extracted, and the character data is converted into the field test character data by the character conversion application built in the field communication device 3, and the field test image data 4B and 5B and the field test character data are transmitted to the host computer 1. (X2 direction).

Although the specific internal configuration of the host computer 1 is not shown, a receiving unit that receives various data transmitted from the plant communication device 2 and the field communication device 3, a storage unit that stores various received data, and various data. It has a configuration in which an information data creation unit that extracts predetermined information from the data and creates information data, a CPU, RAM, ROM, etc. that control the operation of each unit are connected by a bus. The plant communication device 2 and the field communication device 3 do not have a built-in character conversion application, and the host computer 1 reads the characters in the test image data (ODR (Optical Data Reader)) and reads the test character data into characters. A character conversion unit (OCR (Optical Character Reader)) for conversion may be built in, and character data in the test image data received in the host computer 1 may be extracted and converted into characters.

In the host computer 1, for example, the test character data extracted from various test image data as shown in FIG. 2 and converted into characters is stored together with the test image data.

The plant and the construction site access the host computer 1 via the plant communication device 2 and the site communication device 3, respectively, and from the test image data 4A, 5A, 4B, 5B and the image data stored in the host computer 1, respectively. Check the extracted and character-converted test character data.

In this way, by accessing the host computer 1 from both the plant and the construction site and checking the test character data and the test image data, both the plant and the construction site can exchange information on the concrete test results by telephone or the like. You can share it without any problems, and you can check the test results immediately when you want to check it.

In the quality control method of the present invention, the plant test standard image data which is the judgment standard of the pass / fail of the test result at the plant and the site test standard image data which is the judgment standard of the pass / fail of the test result at the construction site are stored in advance. There is. In addition, only one of the plant test reference image data and the field test reference image data may be stored in the host computer 1 as the reference image data.

Here, FIG. 3 is a diagram showing test reference image data (good examples and bad examples) regarding slump properties, and FIG. 4 is a diagram showing test reference image data (good examples and bad examples) regarding the fracture state of the specimen in the compression test. It is a figure which showed.

The quality of the slump property is determined by using the two types of examples shown in FIG. 3 stored in the host computer 1 as the test reference image data 6, and the test image data 5A and 5B related to the slump test also stored in the host computer 1. Is compared with the test standard image data 6 to control the quality of concrete. The illustrated test reference image data 6 is selected from past image data possessed by a plant, a construction site, a construction company, or the like.

By comparing the test image data 5A and 5B with the test reference image data 6 in this way, even an inexperienced manager or the like can easily and accurately judge whether the slump property is good or bad.

On the other hand, the quality of the compression test is determined by using the two types of examples shown in FIG. 4 stored in the host computer 1 as the test reference image data 6, and similarly, the test image data 4A relating to the compression test stored in the host computer 1. , 5A, 4B, 5B are compared with the test reference image data 6, and the quality of the compression test is controlled. Specifically, it is possible to confirm the quality of the coarse aggregate and determine the quality of the test conditions based on the number and angles of fracture cracks generated on the side surface of the specimen after the compression test.

For example, the factors of the bad example shown in FIG. 3 include improper flatness of the upper surface of the specimen, an eccentric load acting on the specimen, and the like. The necessity of retesting can be examined by comparing the test image data 4A, 5A, 4B, 5B with the test reference image data 6 regarding the quality of the fracture condition, and the compression test is performed again if necessary. , Accurate compressive strength can be obtained. Since the results of the compressive strength test often correlate with the test results of ready-mixed concrete, if the test results of compressive strength fail, the test results at the time of ready-mixed concrete are immediately confirmed and the cause of the failure is clarified. Can also be done on the spot.

On the other hand, in the host computer 1, the test image data 4A, 5A, 4B, 5B and the test reference image data 6 are automatically compared, and it is determined that the test image data 4A, 5A, 4B, 5B are rejected. At that time, there is also a method in which an alarm is notified to both or one of the plant communication device 2 and the field communication device 3.

In this method, an image processing unit is built in the host computer 1, and for example, the test image data 4A, 5A, 4B, 5B relating to the slump flow and the test reference image data 6 are superimposed in the image processing unit. A certain threshold value is set in advance for the difference value between the two, and when the difference value exceeds the threshold value, the test image data 4A, 5A, 4B, and 5B are rejected, and the fact that the test image data is rejected is the construction site or plant. Etc. will be sent.

According to this quality control method, quality control can be automated, and the labor of management by a construction manager or the like can be saved.

Further, the strength test date of concrete, for example, the strength test date of 1 week and the strength test date of 4 weeks are stored in the host computer 1, and the test date is set in the plant communication device 2 and the field communication device 3 on each test date. There is also a way to be notified.

According to this quality control method, it is possible to prevent forgetting the test and the like.

Further, there is also a method in which an X-R control chart creation unit is built in the host computer 1 and each X-R control chart is created based on the plant test character data and the field test character data.

Note that FIG. 5 is an example of an XR control chart (specifically, an X ^bar control chart and an R control chart) created by the host computer 1.

In addition, by providing an electronic approval mechanism, it is possible to remotely witness the ordering party or the like using the quality control method shown in the figure.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like within a range not deviating from the gist of the present invention. Also, they are included in the present invention.

1 ... Host computer, 2 ... Plant communication device, 3 ... Field communication device, 4A, 5A ... Plant test image data, 4B, 5B ... Field test image data, 6 ... Test reference image data

Claims (4)

Using the plant communicator at the plant, at least send the concrete plant test image data to the host computer and
Using the site communication device at the construction site, at least the concrete site test image data is transmitted to the host computer.
It is a concrete quality control method that accesses the host computer from at least the plant and the construction site via the plant communication device and the site communication device, and confirms the test image data stored in the host computer. hand,
In the host computer, plant test reference image data that is a criterion for determining the pass / fail of the test result at the plant and / or field test reference image data that is a criterion for determining the pass / fail of the test result at the construction site are stored. And
When the host computer is accessed, the test image data and the test reference image data are compared to perform quality control of concrete .
Character data in the concrete plant test image data is extracted as plant test character data by the plant communication device, and the plant test character data is also transmitted to the host computer using the plant communication device.
A concrete quality control method in which character data in concrete on-site test image data is extracted as on-site test character data by the on-site communication device, and the on-site test character data is also transmitted to the host computer using the on-site communication device. In the host computer, the test image data and the test reference image data are automatically compared, and when the test image data is determined to be unacceptable, the plant communication device and / or the field communication device is used. The concrete quality control method according to claim 1 , wherein an alarm is notified. The concrete strength test date is stored in the host computer.
The concrete quality control method according to claim 1 or 2 , wherein on the strength test date, the plant communication device and the field communication device are notified that the strength test date is reached. The concrete quality control method according to any one of claims 1 to 3 , wherein an XR control chart is created based on the plant test character data and the field test character data in the host computer.

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