JPH07280716A - Slump test measuring device - Google Patents

Abstract

PURPOSE:To enable the real-time measurement of the test result of the slump value or the like by disposing height detecting means for flowable concrete vertically and horizontal position detecting means for flowable concrete horizontally. CONSTITUTION:When concrete 18 in truncated cone shape flows out spreading around by its fluidity and at the same time the top part is also lowered, the intercepted state of infrared rays is shifted to the non-intercepted state successively between projectors 2 and light receivers 4 lined up vertically. The slump value is computed from this change by a height computing program in an arithmetic processing unit. With the spread of concrete 18, the infrared rays are intercepted one after another between the projectors 2 and light receivers 4 of X-Y direction position detecting means 8, 9. In the arithmetic processing unit, the time when each infrared ray is intercepted is clocked and displayed. The result of a slump test can be thus known real time immediately after the test.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device for measuring slump value and slump flow value of concrete.

[0002]

2. Description of the Related Art Conventionally, in order to measure the workability of concrete, a slump cone having a truncated cone shape is placed on an iron flat plate, the concrete to be tested is filled in the cone, and the side surface of the slump cone is filled with the concrete. Pull up the handle provided and pull out the cone.

Then, a value obtained by lowering the top of the concrete is used as a slump value, and the spread of the concrete with respect to a plurality of concentric circles drawn at a predetermined interval on the flat plate is measured with a stopwatch or the like at regular intervals. It was measured and the relationship between the time and the spread of the slump flow was sought. It is also known that the spread of concrete is photographed from above with a video tape recorder or the like, and after the test is finished, the video is reproduced to analyze the slump flow.

[0004]

However, in the method of measuring the slump value and the slump flow as described above, it is necessary to check the state of the concrete with the eyes and to measure the time with the stopwatch, At least two measuring personnel are required, which is troublesome and lacks accuracy. Furthermore, in high fluidity concrete, the slump flow value is the main test method, but the test results can be plotted in a chart,
Since the time and spread are analyzed from the video, there is a problem that it cannot be obtained immediately and accurately.

As described above, the conventional methods for measuring the slump value and the slump flow value have problems to be solved in terms of labor and accuracy required for the measurement. The present invention has been made in view of the above problems, and an object of the present invention is to provide a measuring device that can accurately obtain a test result such as a slump value in real time.

[0006]

Means for solving the above-mentioned problems of the present invention and achieving the above-mentioned objects are as follows: Height detecting means for vertically detecting the height of fluid concrete; Position detecting means for detecting the horizontal position of the fluid concrete and arithmetic processing means for calculating the slump value by the height detecting means and measuring the slump flow by the position detecting means. That is.

Further, the height detecting means and the position detecting means receive a light projecting device in which light projectors are arranged at a predetermined interval and a light receiving device in which light receivers are arranged at the same interval as the light projector. It is to be arranged so as to correspond to each other.

[0008]

According to the slump test measuring device of the present invention, the slump value and the slump flow result can be obtained in real time after the test is completed and can be displayed on a display device such as a display.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment according to the present invention will be described in detail with reference to the drawings. 1 and 2 are schematic configuration diagrams of a measuring device 1 for a slump test according to the present invention.

The measuring device 1 is the same as the light projecting device 3 in which the projectors 2 are arranged in a row in the frame of the measuring device 1 at a predetermined interval (for example, 10 mm) in the vertical direction and the predetermined interval in the vertical direction. A light receiving device 5 in which light receivers 4 are arranged in a row is provided so as to face each other. The light projecting device 3
The height detecting means 7 is configured by the light receiving device 5 and the light receiving device 5.

Further, with the same structure, a light projecting device 3 in which the light projecting device 2 is arranged in a row and a light receiving device 5 in which the light receiving device 4 is arranged in a row are arranged so as to face each other in the horizontal direction, and the position detecting means 8 in the X direction is arranged.
And Y-direction position detecting means 9 are respectively formed and provided on the frame of the measuring device 1. The light receiving device 5 having the light receivers 4 arranged in a row is mounted or embedded under the flat plate 19 of the measuring device 1, and the flat plate 19 is a transparent body so as not to obstruct the transmission of infrared rays and the like. It is necessary.

As shown in FIGS. 4 to 5, the detailed structure of the light projecting device 3 or the light receiving device 5 is made of aluminum or stainless steel or other metal or plastic, which is elongated and has a U-shaped cross section. A protective case 10,
The light projector 2 (or the light receiver 4) included in the concave groove of the protective case 10 and the detachable mount to the protective case 10 so as to cover the front side of the light projector 2 and the like to prevent dust and the like from adhering. The front cover 11 is made of transparent plastic or glass, and the cable 13 has one end connected to the projector 2 and the like and the other end electrically connected to the arithmetic processing unit 6 through the interface 12.

Infrared rays, for example, are radiated between the pair of light projectors 2 and the light receivers 4 which are arranged to face each other. Therefore, the obstacles such as concrete are blocked by the floodlight 2
If there is an obstacle, the infrared ray is blocked, and if there is no obstacle, the infrared ray is not blocked.

Whether or not the infrared rays are blocked is transmitted as an electrical signal through the cable 13 and the interface 12 to the arithmetic processing unit 6 as arithmetic processing means, and the height of the obstacle such as concrete is calculated. It is designed to be done.

Further, as shown in FIG. 5, the detection width by the light projecting device 3 and the light receiving device 5 is set by arbitrarily setting the length of the protective case 10 and the number of the light projecting devices 2 and the light receiving devices 4 arranged in series.
It is possible to change.

Next, the arithmetic processing unit (abbreviated as CPU) 6 is provided with each interface 12 as shown in FIG.
In addition to that, a display 14 for displaying the measurement result and a printer 15 are connected, and a timer 16 is connected as a time reference for measurement.

Further, the CPU 6 is inputted with the height of the slump cone 17 in the slump test and the numerical value of the predetermined interval of the projectors 2 arranged in a line in the height detecting means 7, and the slump cone 17 is pulled up to flow. When the flow of the heat-resistant concrete is stable, the height of the concrete 18 is determined depending on the number of the light emitter 2 and the light receiver 4 in the vertical direction that the infrared ray is not blocked, and the height of the concrete 18 is calculated. The difference is calculated and displayed, and the numerical value of this difference is displayed as a slump value, or, as another method, the entire interval of the projector 2 or the light receiver 4 that has changed from the cutoff state to the non-cutoff state is directly set as the slump value. Such a program is incorporated.

Separately from the program for measuring the slump value, the slump cone 17 is pulled up by the position detecting means 8 in the X direction and the position detecting means 9 in the Y direction, and then flows in the X direction or the Y direction. Whether or not the infrared rays radiated between the projectors 2 and the light receivers 4 are blocked by the spread concrete 18 is determined by the timer 16 at predetermined time intervals, or the time when the infrared rays are blocked. Is stored in the CPU 6, and a program for recording the above and displaying the state as a graph as shown in FIG. 7 is incorporated in the CPU 6.

A schematic image of the measuring device 1 for such a slump test is shown in a perspective view in FIG.
The height detecting means 7 is omitted in the description.

The method of using the slump test measuring apparatus 1 of the present invention as described above will be explained. A slump cone 17 is placed at a predetermined position on a flat plate 19 and a high-fluidity concrete to be subjected to the slump test is set. The cone 17
Fill in.

Next, by operating the operation panel of the measuring device 1, infrared rays are emitted between the height detecting means 7, the X-direction position detecting means 8 and the Y-direction position detecting means 9 between the respective projectors 2 and the light receivers 4. Irradiate.

Then, the slump cone 17 is pulled up. Then, the concrete 18 which was a truncated cone shape,
Due to its fluidity, it spreads out around and flows out, and at the same time, the top also descends.

In the height detecting means 7, the emitted infrared rays are not blocked between the light projector 2 and the light receiver 4 which are initially located on the slump cone 17. Then, as the top of the concrete 18 is gradually lowered, the infrared ray blocking state is sequentially changed from the infrared blocking state to the non-blocking state between the projector 2 and the light receiver 4 which are vertically arranged.

The slump value is calculated by the height calculation program in the arithmetic processing unit 6 based on the change in the cut-off / non-cut state of the irradiated infrared rays.

Next, in the measurement of the slump flow of the concrete 18 in the X and Y directions, the spread of the concrete 18 causes the projector 2 of the position detecting means 8 in the X direction to successively move.
Infrared rays are blocked between the light receiving device 4 and the light receiving device 4, and similarly in the Y direction, the light emitting device 2 and the light receiving device 4 of the position detecting means 9 in the Y direction.
Infrared is blocked between and.

Then, in the arithmetic processing unit 6, the time when each infrared ray is blocked is measured, and this time is made to correspond to the arrangement position of the pair of the projector 2 and the light receiver 4 where the infrared ray is blocked. Then, the characteristic curve shown in FIG. 7 is created.

The slump value and the slump flow value are output to and displayed on the display 14 and the printer 15, for example.

Thus, the result of the slump test can be known in real time immediately after the test. Also, the measurement of spread in slump flow is
It is an automatic measurement without manual labor, which is accurate and improved in accuracy.

As another embodiment of the measuring apparatus 1 for the slump test of the present invention, as shown in FIG. 8, the flat plate 19 is made of iron and the photodetectors of the position detecting means 8 and 9 in the X and Y directions. The slits 20 necessary for at least the infrared rays to pass therethrough so that the infrared rays reach the light receiving device 5 in which 4 are arranged.
(About 5 to 10 mm) is provided, the light receiving device 5 is mounted on the lower side of the flat plate 19, and a transparent plastic or glass lid 21 is fitted into the slit 20.

By doing so, substantially the entire flat plate 19 can be made of iron and can be used repeatedly.

Further, the light projecting device 3 and the light receiving device 5, which are arranged opposite to each other, are not limited to the example shown in the figure, and may be arranged opposite to each other in a state where they are replaced with each other.

Further, as a device for automatically lifting the slump cone 17, a gripping part for gripping or adsorbing the upper part of the slump cone 17 and a vertical movement of the gripping part with a plunger, a jack, etc., or lifting by a lever action. It is also possible to provide an automatic lifting device comprising a lifting means and a drive device for the lifting means.

[0033]

As described above, the measuring device for the slump test according to the present invention comprises the height detecting means arranged in the vertical direction for detecting the height of the flowable concrete, and the flow detecting means arranged in the horizontal direction. Detecting means for detecting the horizontal position of the reinforced concrete, and arithmetic processing means for calculating the slump value by the height detecting means and measuring the slump flow by the position detecting means. It is possible to obtain the value and the slump flow value accurately and in real time, and there is an excellent effect that the work efficiency is improved.

The height detecting means and the position detecting means include a light emitting device in which light emitting devices are arranged in a row at a predetermined interval, and a light receiving device in which light receiving devices are arranged in the same distance as the light emitting device and the light receiving device. Since they are arranged so as to correspond to each other, it is possible to easily obtain the spread of the high-fluidity concrete with a simple device.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a measuring device for a slump test according to the present invention.

FIG. 2 is a plan view of a measuring device for the slump test.

FIG. 3 is a schematic perspective view of a measuring device for the slump test.

FIG. 4 is an exploded perspective view of a light emitting device or a light receiving device in which a light emitting device or a light receiving device are arranged in a line.

FIG. 5 is a front view showing a state in which a light projecting device and a light receiving device are arranged to face each other.

FIG. 6 is a configuration block diagram of a slump test measuring device of the present invention.

FIG. 7 is a characteristic curve diagram of slump flow showing the spread of time and concrete.

FIG. 8 is a partially enlarged vertical sectional view according to another embodiment of the present invention.

[Explanation of symbols]

 1 slump test measuring device, 2 light emitter, 3 light emitter, 4 light receiver, 5 light receiver, 6 arithmetic processing device, 7 height detecting means, 8 X direction position detecting means, 9 Y direction position detecting means, 10 protective case, 11 front cover, 12a, b, c interface, 13 cable, 14 display, 15 printer, 16 timer, 17 slump cone, 18 concrete, 19 flat plate, 20 slit, 21 lid.

Claims (2)

[Claims] 1. A height detecting means arranged vertically to detect the height of the fluid concrete; a position detecting means arranged horizontally to detect the horizontal position of the fluid concrete; A measuring device for a slump test, comprising: a height detecting means for calculating a slump value; and an arithmetic processing means for measuring the slump flow by the position detecting means. 2. The height detecting means and the position detecting means include a light emitting device in which light emitting devices are arranged in a row at a predetermined interval, and a light receiving device in which light receiving devices are arranged in the same space as the light emitting device and the light receiver. 2. The slump test measuring device according to claim 1, wherein and are arranged so as to correspond to each other.