JP2000171378A - Machine for testing clearance passing property of concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make simplifiable flowing obstacle installing work by providing an opening formed in the vicinity of the bottom part of a front face or a rear face and a cover capable of blocking up it, and installing a flowing obstacle at the lower end of a partition plate from the opening. SOLUTION: A wall surface 4 constitutes a partition plate. An opening 8 is formed in the vicinity of the bottom part of a rear face 2, a cover 9 capable of blocking up an opening is provided on the opening 8, a sample gathering port is formed on the outflow chamber 6 side of a cover 9, and the sample gathering port can also be closed by a cover 10. The opening edge of the opening 8 continues with the inside and a bottom part of the respective side surfaces 3a, 3b. A U-shaped template 11 can be inserted from the opening 8. A flowing obstacle 18 is composed of a plate 19 of a slender metallic plate and a steel bar 20 suspended from and fixed to its one long side, and the flowing obstacle 18 is pushed in while sliding the plate 19 along clearance 17. The height of the flowing obstacle 18 and the height position of a guide 16 are decided so that the lower end of the steel bar 20 gets on a test machine bottom part in a state of sliding the plate 19 in the clearance 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tester for testing the permeability of concrete through a gap.

[0002]

2. Description of the Related Art As a method for testing the permeability of concrete through a gap, there is the following method. When performing this test, a test machine as shown in FIGS. 7 and 8 is used. The testing machine has a front surface 101, a rear surface 102, and a pair of side surfaces 103a and 103b, and has a box-shaped container shape having a U-shaped or box-shaped bottom. These testers have predetermined dimensions, but the description of the dimensional relationship is omitted here. 7 and 8
As shown in (1), a partition plate 104 is provided at the center of the test machine, and the inside is partitioned into an inflow chamber 105 and an outflow chamber 106. Specifically, as shown in FIGS. 7A and 8A,
Grooves 1 are provided on the front surface 101 and the rear surface 102 of this testing machine, respectively.
07 is formed, and the partition plate 104 is inserted along the groove 107 from above.

However, the partition plate 104 is not inserted until it comes into contact with the bottom portion.
Between the lower end and the bottom of the inflow chamber 105 and the outflow chamber 10
6 is communicated. And the partition plate 10
At the lower end of 4, a flow obstruction 108 is attached. As will be described in detail later, the flow obstruction 108 is one in which steel bars are arranged in a fence shape, and is a device for testing the permeability of concrete by flowing concrete between gaps between these steel bars. further,
As shown in FIGS. 7 (a) and 8 (a), the front 10
1 and the rear surface 102, a groove 110 next to the groove 107
Is formed, and the gate 109 is formed along the groove 110.
Is inserted from above. When the gate 109 is inserted, the gate 109 blocks the flow obstruction 108 from the outflow chamber 106 side, and shuts off the inflow chamber 105 and the outflow chamber 106.

[0004] When testing the gap-passing property of concrete, the above-mentioned testing machine is installed in a horizontal place. Then, concrete is poured into the inflow chamber 105 with the gate 109 inserted, that is, with the inflow chamber 105 and the outflow chamber 106 shut off. After the inflow chamber 105 is sufficiently filled with concrete, the gate 109 is lifted at once by holding the handle 111 for a predetermined time. When the gate 109 is raised, the inflow chamber 105 and the outflow chamber 106 communicate with each other, so that the concrete filled in the outflow chamber 105 flows through the flow obstruction 108 to the outflow chamber 106.

As described above, the concrete flows from the inflow chamber 105 to the outflow chamber 106, and is allowed to stand still until the filling of the outflow chamber 106 stops, and the filling time and the filling height are measured. The concrete after passing the flow obstacle 108 is sampled from the sample sampling port 112 arranged on the outflow chamber 106 side, and the amount of coarse aggregate is measured. By performing the above test, it is possible to express the gap permeability of concrete as a numerical value.

[0006]

As the flow obstruction 108, several types having different sizes of the gap between the steel bars are prepared. These flow obstacles 108 are selected at any time according to the purpose of the test, for example, according to the shape of the construction site, that is, the shape of the site into which the concrete to be tested is poured. In the above conventional example, a groove 107 is formed in the front surface 101 and the rear surface 102, and along this groove 107,
The partition plate 104 is inserted. And
To change the flow obstruction 108, the partition 1
04 is pulled up along the groove 107 so that the flow obstruction 108 is replaced. However, if the partition plate 104 is inserted or pulled up in order to replace the flow obstruction 108, the mounting work becomes very troublesome. SUMMARY OF THE INVENTION An object of the present invention is to provide a concrete gap tester capable of easily attaching a flow obstacle.

[0007]

SUMMARY OF THE INVENTION The present invention provides a box-shaped container having a front surface, a rear surface, and a pair of side surfaces, and having a U-shaped or box-shaped bottom portion. It is premised on a concrete gap-passing test machine which is divided into an inflow chamber on the side surface side of the above and an outflow chamber on the other side surface, and a flow obstacle is attached to a lower end of the partition plate. The first invention is characterized in that it has an opening formed near the bottom of the front surface or the rear surface, and a lid that can close the opening, and a flow obstruction is attached from the opening to the lower end of the partition plate. Have.

According to a second aspect, in the first aspect, a flow obstruction formed by suspending a plurality of steel bars in a bar shape on one long side of an elongated plate, and a groove provided at a lower end of the partition plate are provided.
The flow obstruction is inserted from the opening, the plate is slid into the groove, and the flow obstruction is attached to the lower end of the partition plate.

[0009]

1 to 6 show an embodiment of a concrete gap tester according to the present invention. As shown in FIGS. 1 and 2, the tester has a front surface 1, a rear surface 2, and a pair of side surfaces 3.
a, 3b, and has a box-shaped container shape with a box-shaped bottom. On one side surface 3a, the height of the side surface 3a, the front surface 1, and the rear surface 2 is increased, and the front surface 1 and the rear surface 2 are continuous with the wall surface 4.

Further, as shown in FIG. 2, the lower end of the wall surface 4 is connected to the side surface 3b on the other side surface 3b side, the front surface 1 and the rear surface 2
The lower part of the tester is located below the upper end of
It partitions into an inflow chamber 5 on one side 3a and an outflow chamber 6 on the other side 3b. However, communication between the inflow chamber 5 and the outflow chamber 6 between the lower end and the bottom of the wall surface 4 is the same as in the above-described conventional example. That is, the wall surface 4 constitutes the partition plate according to the present invention. In addition, an acrylic material window 7 is provided on the front surface 1 on both the inflow chamber 5 side and the outflow chamber 6 side so that the state of concrete flowing can be observed.

As shown in FIG. 3, an opening 8 is formed near the bottom of the rear surface 2. Then, as shown in FIG. 1, a lid 9 is attached to the rear surface 2 so that the opening 8 can be closed. Further, the lid 9 is formed with a sampling port located on the outflow chamber 6 side, and the sampling port can also be closed by the lid 10. As shown in FIG. 3, the opening edge of the opening 8 is continuous with the inside and the bottom of each of the side surfaces 3a and 3b. The U-shaped plate 11 can be inserted through the opening 8.

The U-shaped plate 11 is formed by bending a metal plate at a predetermined curvature, and has a width W substantially equal to the distance between the insides of the side surfaces 3a and 3b, and a depth D of the front surface 1a.
The distance between the inside and the inside of the rear surface 2 is substantially the same.
Further, on the back surface of the U-shaped plate 11, a pair of base portions 12 are provided.
Is installed. Therefore, if the U-shaped plate 11 is placed in a horizontal position, the U-shaped plate 11 will be supported by the bottom of the back surface and the pair of bases 12. A handle 15 is attached to an appropriate position on the back surface of the U-shaped plate 11. Accordingly, the U-shaped plate 11 can be inserted from the opening 8 by holding the handle 15.

When the U-shaped plate 11 is inserted from the opening 8, the bottom of the tester can be changed from a box type to a U-shaped one. Note that the U-shaped plate 11 may be simply placed on the bottom, but in this case, there is a possibility that the concrete leaks to the back side of the U-shaped plate 11. That is, when the concrete flows on the surface of the U-shaped plate 11, a force biased from the surface side of the U-shaped plate 11 may act as shown in FIG. As a result, the U-shaped plate 11 is deformed by the force, and the end of the U-shaped plate 11 separates from the inside of the side surfaces 3a and 3b as shown by the dashed line in FIG. Will leak.

Therefore, as shown in FIGS.
A guide 13 is attached to the inside of a and 3b in accordance with the height H of the U-shaped plate 11. As shown in FIG. 3, the guide 13 bends an elongated metal plate in a stepwise manner in the short direction,
The fixing surface 13a and the guide surface 13b are formed. Then, while keeping the guide 13 horizontal, the fixing surface 13a is fixed to the inside of the side surfaces 3a, 3b via rivets. At this time, the guide surface 13 of the guide 13
b facing downward, the guide surface 13b and the side surfaces 3a, 3a
b The gap 14 is formed between the inside and the inside. The gap 14 is set to be substantially the same as the thickness of the U-shaped plate 11.

When the U-shaped plate 11 is inserted, both ends of the U-shaped plate 11 are inserted into the gaps 14 as shown in FIG. Then, while sliding the end of the U-shaped plate 11 along the gap 14, the U-shaped plate 11
I'll push. If both ends of the U-shaped plate 11 are aligned along the guide surface 13b of the guide 13, the U
The rattling of the character plate 11 can be prevented. Moreover,
Even if a force biased from the surface side of the U-shaped plate 11 acts, the guide surface 13b exerts a drag, and the U-shaped plate 1
1 can be maintained in a state of being adjacent to the inside of the side surfaces 3a and 3b. If the end of the U-shaped plate 11 can be prevented from separating from the inside of the side surfaces 3a and 3b, concrete will not leak to the back side of the U-shaped plate 11.

In the tester of the embodiment described above, usually,
It can be used as a box-type testing machine at the bottom. Then, if the U-shaped plate 11 is inserted from the opening 8 and the U-shaped member 11 is placed on the bottom, it can be used as a testing machine having a U-shaped bottom. Thus, 1
Since two test machines can be used as two types of test machines, the cost can be reduced and the installation space is not wasted.

In this embodiment, as shown in FIGS. 2 and 5, a guide 16 is attached to the lower end of the wall 4. The guide 16 is, as shown in FIG.
Similarly to the above, a long and narrow metal plate is bent in a stepwise manner in the short direction to form a fixed surface 16a and a guide surface 16b. Then, while keeping the guide 16 horizontal, the fixing surface 16a is fixed to the inflow chamber 5 side of the wall surface 4 via rivets. At this time, the guide surface 1 of the guide 16
6b is directed downward, so that a gap 17 is formed between the guide surface 16b and the inflow chamber 5 side of the wall surface 4.

On the other hand, as shown in FIG.
Is a plate 19 made of an elongated metal plate, and a plurality of steel bars 2 fixed to one long side of the plate 19 by welding or the like.
It consists of 0. These steel bars 20 are fixed to one long side of the plate 19 in a state of being suspended in a fence shape. And by flowing concrete in the gap between each steel bar 20,
We are trying to test its permeability. Further, the thickness of the plate 19 is substantially equal to the interval of the gap 17. When attaching the flow obstruction 18, the flow obstruction 18 is inserted from the opening 8 and, as shown in FIG.
The plate 19 is inserted into the end of the gap 17. Then, while sliding the plate 19 along the gap 17, the flow obstacle 18 is pushed in.

The height of the flow obstruction 18 and the height position of the guide 16 are set such that the lower end of the steel bar 20 is just placed on the bottom of the tester with the plate 19 of the flow obstruction 18 slid into the gap 17. I have decided. However, with the lower end of the steel bar 20 resting on the bottom, a margin is provided for the depth of the gap 17 with respect to the upper end of the plate 19. By doing so, even when the U-shaped plate 11 is placed as described above, the flow obstruction 18 can be lifted to correspond to the thickness of the U-shaped plate 11.

In the tester of the embodiment described above, the flow obstruction 18 can be inserted through the opening 8 and the plate 19 can be slid to be attached to the lower end of the wall surface 4. Therefore, the flow obstruction 18 can be easily replaced without having to pull up or insert the partition plate 104 one by one as in the conventional example. When flowing concrete, a force from the inflow chamber 5 side acts on the flow obstacle 18, but since the plate 19 is supported by the wall surface 4, the flow obstacle 18 may not tilt. Absent. Of course, if the lower end of the steel bar 20 of the flow obstruction 18 resting on the bottom is further fixed in some way, the flow obstruction 18 can be firmly supported. In this embodiment, the gap 17 formed by the guide 16 constitutes the groove according to the present invention. However,
The groove may be formed directly at the lower end of the wall surface 4.

In this embodiment, a gate 21 for shutting off the inflow chamber 5 and the outflow chamber 6 is inserted as follows. As shown in FIGS. 1 and 2, a plurality of pins 22 project from the inside of the front surface 1, and the pins 22 are linearly spaced from the bottom of the tester in an appropriate direction in the height direction. Are arranged. Although not shown in FIGS. 1 and 2, a pin 22 is also provided on the inside of the rear surface 2 similarly to the front surface 1. These pins 22 are located closer to the outflow chamber 6 than the wall surface 4. Therefore, some of the pins 22 located above face the wall surface 4,
As shown in FIG. 6, the interval 1 is maintained therebetween.

When the gate 21 is inserted, FIG.
The gate 21 is lowered so as to be inserted into the space 1 between the gate 22 and the pins 22 along the wall surface 4 as shown by arrows k in 2 and 6. Then, if the gate 21 is lowered until the gate 21 comes into contact with the bottom portion, the gate 21 is prevented from flowing.
8 can be closed from the outflow chamber 6 side, so that the inflow chamber 5 and the outflow chamber 6 can be shut off. In this state, the gate 21 is supported straight by the wall surface 4 and the pins 22. When starting the test, the gate 21 may be pulled up at once with the handle 23 while the inflow chamber 5 is filled with concrete.

In the test machine of the embodiment described above, the inflow chamber 5
Is filled with concrete, the gate 21 is pressed against the pin 22 by the pressure action. That is, the gate 21 does not make surface contact with the side of the groove 110 as in the above-described conventional example, but only makes line contact with each pin 22. Therefore, when the gate 21 is pulled up, the gate 21 only needs to be moved against the sliding resistance between the pin 22 and the gate 21 can be pulled up smoothly. Further, since the grooves 110 do not need to be formed as in the above-described conventional example, gravel or the like contained in concrete does not get in the grooves 110, and the gate 21 can be pulled up smoothly.

Furthermore, even when cleaning the inside of the testing machine, it is sufficient to prevent the concrete from remaining around the pins 22. Therefore, the cleaning can be performed more neatly than the cleaning of the elongated grooves 110. In particular, as described above, if the opening 8 is formed near the bottom of the rear surface 2, the opening 8
The inside of the testing machine can be cleaned from the above, and concrete can be effectively prevented from remaining. Therefore, it is possible to prevent the concrete from remaining and hardening, and it is possible to insert the gate 21 smoothly.

[0025]

According to the present invention, the flow obstruction can be inserted from the opening and attached to the lower end of the partition plate.
Therefore, the flow obstruction can be easily replaced without raising or inserting the partition plate.

According to the second aspect of the present invention, the flow obstruction can be easily attached only by sliding the plate into the groove provided at the lower end of the partition plate.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a test machine of an embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 shows the vicinity of the bottom of the rear surface 2 of the testing machine, and shows a U-shaped plate 1;
FIG. 2 is a perspective view showing a state in which a first is inserted.

FIG. 4 is a view showing the vicinity of an end of a U-shaped plate 11;

FIG. 5 is a perspective view showing the vicinity of the lower end of the wall surface 4 and showing how the flow obstruction 18 is attached.

FIG. 6 is a diagram showing a relationship between a wall surface 4 and a pin 22.

FIGS. 7A and 7B show a conventional testing machine having a box-shaped bottom, wherein FIG. 7A is a plan view and FIG. 7B is a cross-sectional view taken along line bb of FIG.

FIG. 8 shows a conventional testing machine having a U-shaped bottom,
(a) is a plan view, and (b) is a cross-sectional view taken along line bb of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front 2 Rear 3a, 3b Side 4 Wall 5 Inflow chamber 6 Outflow chamber 8 Opening 9 Lid 16 Guide 17 Gap 18 Flow obstruction 19 Plate 20 Steel bar

Claims (2)

[Claims] 1. A box-shaped container having a front surface, a rear surface, and a pair of side surfaces, and having a U-shaped or box-shaped bottom portion,
The inside thereof is partitioned into an inflow chamber on one side and an outflow chamber on the other side by a partition plate, and in a concrete gap passage tester having a flow obstacle attached to a lower end of the partition plate, the front surface or A concrete gap tester, comprising: an opening formed near the bottom of the rear surface; and a lid capable of closing the opening, wherein a flow obstacle is attached to the lower end of the partition plate from the opening. 2. A flow obstruction, comprising a plurality of steel bars suspended in a bar shape on one long side of an elongated plate, and a groove provided at a lower end of a partition plate. The concrete gap passage tester according to claim 1, wherein the flow obstacle is attached to a lower end of the partition plate by sliding in the groove.