JPH076523Y2 - Concrete breathing test equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete breathing tester for measuring the amount of water discharged when concrete hardens according to a measurement standard defined by JIS (Japanese Industrial Standard).

[0002]

2. Description of the Related Art Since water in a concrete floats on the upper surface in the process of solidifying the concrete, the amount of water at that time is
It is measured according to the measurement standard defined by IS, but in that case, the concrete sample conventionally sampled at the concrete construction site is stored in a container of a predetermined capacity,
Sampling the rising water at regular intervals,
It was measured with a graduated cylinder to quantitatively determine the relationship between the amount of discharged water per hour. That is, each operation such as water sampling and weighing from the sample collected at regular intervals was all performed artificially.

[0003]

However, artificially performing the timely sampling and measuring of water as in the above-mentioned conventional example, even if it is only necessary to sample water only once, at predetermined time intervals. Performing the same water sampling operation for each time or measuring the water volume each time is a long time (24 hours), so the workability is poor, and since it is the measurement by the graduated cylinder, it is highly accurate. No measured value was obtained. Therefore, the present invention is intended to provide a device which eliminates the troublesomeness at the time of weighing and automatically obtains a highly reliable weighing value.

[0004]

[Means for Solving the Problems] An airtight sample container which accommodates a sample sampled from a construction site and can be tilted at a fixed angle, and a vacuum for depressurizing the inside of the sample container via a vacuum bottle connected to the sample container A pump, an electronic balance that collects the water that drips through the vacuum bottle and measures the amount of water, and a control that controls the inclination of the sample container, the start and stop of the vacuum pump, the weighing operation by the electronic balance, the operation of the printer, and the like. And equipment.

[0005]

[Function] When an airtight sample container containing a sample such as concrete is capped and allowed to stand for a certain time in the sample container
Part of the water in the concrete rises and stays on the top of the container.
It In order to measure this amount of water, the sample container is tilted at a predetermined angle to receive the exuded water into the measuring bottle on the electronic balance, and the vacuum pump is operated to reduce the pressure in the vacuum bottle.
By promoting this. The amount of water is measured by an electronic balance, and the above series of operations is automatically repeated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the embodiments shown in the drawings. As shown in FIGS. 1 to 3, a support base 9 is fixedly installed on the upper stage 2 of the base frame 1, and the support base 9 is provided. A movable table 11 for holding the airtight sample container 13 in a tiltable and static manner is pivotally supported at a fulcrum 12 at one end, and the lower surface of the other end of the movable table 11 is attached to a rack rod 14 installed in the support table 9. A pinion 15 which is supported at the upper end and meshes with the rack rod 14 is connected so as to be rotated by an electric motor 10, and a vacuum bottle 6 is installed on the upper stage 2 of the base frame 1 and the vacuum bottle 6 , The movable table 1
The flexible tube 7 is connected to the upper part of the airtight sample container 13 which is left stationary on the upper part 1. Further, below the base frame 1, an electronic balance 4 on which a vacuum pump 3 communicating with the inside of the vacuum bottle 6 and a measuring container 5 for collecting the dripping water from the vacuum bottle 6 are placed is left standing.
In addition, a timer 20 for setting a measurement time on the upper ends of two struts facing each other on both sides of the base frame 1, a printer 21 for recording measurement values at any time, and switches 18, 19 for start, stop, power supply, etc. A control device 16 including 17 and the like is attached.

[0007] Next, to describe the series of operations of the above apparatus, first, a predetermined amount of fresh concrete sample a sampled at the construction work site in the airtight sample container 13 is stored by trowel finishing up to a height of 3 cm from the upper surface of the sample container 13. Then, after colliding with the projecting rod 25 times, the total weight of the sample to be sampled is measured, the preparation is completed by placing the upper lid 8 and sealing it, and the power switch 17 of the control device 16 is turned “ON”.
When the start button 18 is pressed in this state, the timer 2
0, the printer 21 starts. Next, according to the setting of the timer 20, the electric motor 10 is rotated 8 minutes after the start, and the rack 14 is lifted via the pinion gear 15, and the upper end of the rack 14 has a plane including the fulcrum 12. Movable stand 11 until it reaches the height (50 cm) from
Is pushed up to tilt the airtight sample container 13. At the same time, the vacuum pump 3 is operated to slightly reduce the pressure in the vacuum bottle 6 to remove the air in the sample container 8 through the flexible tube 7, and the water content floating on the upper part of the sample container 8 is removed. Is poured into the vacuum bottle 6 through the flexible tube 7 as shown in FIG.
Further, it is poured into the measuring container 5 through the vacuum bottle 6 and the amount of water is measured by the electronic balance 4. Further, when 2 minutes have elapsed from the start of the measurement, that is, when the total time from the start has passed 10 minutes, the electric motor 10 is reversely rotated to return the movable table 11 to the original state together with the sample container 13 and the vacuum pump 3
And the weighing operation by the electronic balance are stopped, and the first measurement is completed.

Next, at the time when 8 minutes have passed after the end of the first measurement, that is, at the time of 18 minutes from the start, the second operation is performed again by the respective operations of the electric motor 10, the vacuum pump 3, and the electronic balance 4 as described above. After the measurement is started and the operation is continued for 2 minutes, the electric motor 10 is operated, the vacuum pump 3 and the electronic balance 4 are stopped, and the second measurement is completed. After repeating the measurement for 2 minutes several times at 10 minute intervals as described above,
After that, the measurement for 2 minutes was switched to 30 minute intervals for a total of 24 hours, and the recording was performed while measuring the correlation characteristics of time against the amount of water collected and the total amount of water collected, and recording of concrete at each construction site. The state of curing is quantitatively obtained. The time cycle of measurement is not limited to the above example.

[0009]

As described above, the present invention automates the operation of tilting the airtight sample container at regular time intervals and the depressurization of the sample container at the same time as the tilting operation, thereby repeating the measurement for 24 hours. In addition to eliminating the trouble of time management, the accuracy of time management is significantly improved as compared with the conventional manual operation, and the reliability of measured values can be further increased. In addition, until now, in this type of measurement, the person in charge took up all day (24 hours), but with the advent of the device of the present invention, it can be made unmanned and labor costs can be reduced.

[Brief description of drawings]

FIG. 1 is a functional schematic diagram of the device of the present invention.

FIG. 2 is an external front view of the same device.

FIG. 3 is a right side view of the above.

FIG. 4 is a schematic view of a tilt mechanism of a sample container.

[Explanation of symbols]

 3 Vacuum pump 4 Electronic balance 6 Vacuum bottle 13 Sample container 16 Controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-144363 (JP, A) JP-A-63-165756 (JP, A) Actually-opened Sho-56-128574 (JP, U) JP-B-57- 42188 (JP, B1)

Claims (1)

[Scope of utility model registration request] 1. A predetermined amount of sampled sample is stored,
An airtight sample container that can be tilted at a fixed angle, a vacuum pump that decompresses the inside of the sample container via a vacuum bottle connected to the sample container, and an electronic balance that measures the amount of water collected from the water dropped through the vacuum bottle. And the inclination of the airtight sample container,
A breathing test device for concrete, comprising a control device for automatically operating various parts such as a vacuum pump, an electronic balance, and a printer.