JP3242512U - Concrete bleeding test device - Google Patents

Abstract

A bleeding test apparatus is provided that facilitates tilting of a container during a bleeding test and facilitates removal of concrete from the container after the bleeding test is completed. A container-shaped apparatus used for a concrete bleeding test, comprising a cylindrical container body 1 having upper and lower ends 1a and 1b opened, and a lower end 1b of the container body 1 detachably attached to the container. The bottom plate member comprises a bottom plate member 2 for closing and holding the lower end 1b of the container body 1, a lid member 3 detachably attached to the upper end 1a of the container body 1, and a punch for removing concrete in the container body 1. 2 is provided with a booster tilting structure 11 for tilting the container body 1 . [Selection drawing] Fig. 1

Description

The present invention relates to concrete bleeding test equipment and, more particularly, to test equipment technology for use in bleeding tests to determine the amount of water that accumulates on fresh concrete.

Bleeding of concrete is a phenomenon in which water floats to the surface of concrete after it is placed. The rise of water caused by this bleeding causes sinking and cracking of concrete, laitance, sand streaks, etc. Unfavorable effect on properties.

In order to prevent the adverse effects of such bleeding, ready-mixed concrete suppliers and concrete contractors conduct bleeding tests on concrete before delivery or construction.

The bleeding test is a test to measure the amount of water accumulated on a fresh concrete sample placed in a container. Bleeding Test Method for Concrete), this test method stipulates the use of a metal cylindrical container with an inner diameter of 250 mm and an inner height of 285 mm.

By the way, when the concrete sample and the container specified by JIS are combined, it becomes a considerable weight of about 40 kg. It was a test method that required a great deal of labor and was a heavy burden on the testers.

In order to reduce the work burden on the tester, the Japan Concrete Institute (JCI) has defined a concrete bleeding test method using a small container for concrete with a coarse aggregate having a maximum size of 25 mm or less.

The dimensions of the small container used in this bleeding test method were 150 mm inner diameter x 300 mm inner height or 125 mm inner diameter x 250 mm inner height, which reduced the work load of the tester to some extent.

"JCI-S-015-2018 Bleeding Test Method for Concrete in Small Containers" (Public Corporation) Published by Japan Concrete Institute, December 2018

However, even the tests specified by JCI have the following problems, and the work in the tests still entails a heavy burden on the testers, and further improvements have been desired.

That is, this bleeding test was conducted for about 8 hours, during which time the water seeped out from the upper surface of the concrete in the small container was sucked up. A block is sandwiched at one end of the bottom of the container, the container is tilted to collect water, then the block is removed from the bottom of the container, and the container is gently leveled again.

This work of tilting the small container is performed a total of 10 times during the bleeding test, but the combined weight of the small container and the concrete sample is not as heavy as the JIS standard container, but it is quite heavy. , such a heavy container is floated on one side and a block is gently sandwiched there. The task of removing the block again and gently returning the small container to the horizontal position was difficult and still imposed a heavy burden on the tester.

In addition, at the end of the bleeding test, the concrete hardens and hardens in the small container, and it is difficult to remove such hardened concrete from the small container. As a result, the small container must be discarded, which is very uneconomical.

The present invention has been made in view of such conventional problems, and the purpose thereof is to facilitate tilting of the container during the bleeding test and to remove the concrete from the container after the bleeding test is completed. To provide an easy bleeding test device.

In order to achieve the above object, the concrete bleeding test apparatus of the present invention is in the form of a container for use in a concrete bleeding test, comprising a cylindrical container body with both upper and lower ends opened, and a A bottom plate member detachably attached to close and hold the lower end of the container body, a cover member detachably attached to the upper end of the container body, and a punch for removing concrete from the container body. Further, the bottom plate member has a boosting tilting structure for tilting the container body.

The following configuration is adopted as a preferred embodiment.
(1) In the bottom plate member's force boosting tilt structure, a linear edge that constitutes a tilting fulcrum of the container body is provided on a part of the outer peripheral edge of the bottom plate member, and a position symmetrical to the linear edge on the outer peripheral edge is provided. A toggle clamp is provided, and one side of the bottom plate member is raised and held by a predetermined dimension due to the clamping action of the toggle clamp.

(2) The punch includes a pressing support bar that is attached and fixed to the upper end of the container body in a bridging manner, and a pressing support bar that is threadedly supported by the pressing support bar so as to be able to advance and retreat in the axial direction of the container body. It comprises a bolt member and a pressing disc that can move in the axial direction in the container body, and the tip of the pressing support bolt member is press-engaged with the central portion of the pressing disc. .

The concrete bleeding test apparatus of the present invention is in the form of a container, and includes a cylindrical container body with both upper and lower ends open, and a lower end of the container body detachably attached to close the lower end of the container body. It comprises a bottom plate member for holding, a lid member detachably attached to the upper end of the container body, and a punch for removing concrete in the container body, wherein the bottom plate member manually operates the container body. Since it is equipped with a tilting booster tilting structure, the unique effects listed below can be obtained, and the container can be easily tilted during the bleeding test, and the bleeding test can be easily taken out of the container after the bleeding test is completed. Equipment can be provided.

(1) Since the bottom plate member that closes and holds the lower end of the container body has a boosting tilting structure that tilts the container body by manual operation, tilting of the container body during the water sucking operation during the bleeding test is eliminated. , it can be done only by manual operation, eliminating the troublesome work of tilting the container and sandwiching the block as in the past.

(2) In addition, the force boosting tilt structure of the bottom plate member has a linear edge that constitutes the tilting fulcrum of the container body at a part of the outer peripheral edge of the bottom plate member, and the linear edge is positioned symmetrically on the outer peripheral edge. In addition, a toggle clamp is provided to amplify a small force to a large force, and one side of the bottom plate member is lifted and held by a predetermined dimension due to the clamping action of the toggle clamp. The manual operation for tilting becomes a light one-touch operation, and the work of sucking up water during the bleeding test can be performed more easily and lightly.

(3) Since the punch is provided for removing the concrete from the container body, the hardened concrete can be reliably removed from the container body at the end of the bleeding test.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the bleeding test apparatus of the concrete which is one Embodiment which concerns on this invention. It is a perspective view which shows the state in which the container main body of the same bleeding test apparatus was made to incline by the toggle clamp of a baseplate member. It is a perspective view which shows the state which reverses the container main body of the same bleeding test apparatus upside down, and pushes out the hardened concrete in a container main body with a punch. It is a front view which decompose|disassembles and shows the same bleeding test apparatus. It is a perspective view which shows the baseplate member of the same bleeding test apparatus. 6(a) is a plan view of the pressing support bar, FIG. 6(b) is a front view of the pressing support bar, and FIG. 6(c). is a front view of the pressing bolt member, and FIG. 6(d) is a front view of the pressing disk. It is a side view which shows the state in which the container main body of the same bleeding test apparatus was made to incline by the toggle clamp of a baseplate member. It is a perspective view which shows the state which turned upside down the container main body of the same bleeding test apparatus.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Identical reference numerals denote identical components or elements throughout the drawings.

The concrete bleeding test device according to the present invention is shown in FIGS. A container-shaped apparatus suitably used for carrying out the "bleeding test method", comprising a container body 1, a bottom plate member 2, a lid member 3 and a punch 4 as main parts.

The container body 1 serves as the container portion of this test apparatus and is used to fill and contain a concrete sample. It is formed from a constituent material such as vinyl chloride resin, and is a steel cylindrical body in the illustrated embodiment.

The shape and dimensions of the container body 1 are set to 150 mm inner diameter×300 mm inner height or 125 mm inner diameter×250 mm inner height in accordance with JCI-S-015-2018. The container body 1 of the illustrated embodiment is set to have an inner diameter of 150 mm and an inner height of 300 mm.

A pair of handles 5, 5 for hand-held operation are provided outwardly and integrally at the upper portion in the vertical direction of the container body 1, and a mounting support member 6 is integrally provided at the lower end 1b. . The mounting support member 6 is integrally provided with an annular mounting portion 6a constituting the lower end portion of the container body 1 and a pair of mounting bars 6b, 6b projecting outward from the mounting portion 6a.

These mounting bars 6b, 6b extend on one diameter line of the annular mounting portion 6a, and as will be described later, tightening bolts 16, 16 of the bottom plate member 2 and tightening bolts 23, 23 of the punch 4. (See FIG. 3) are provided with engagement grooves 7, 7 for releasably engaging with each other. The engagement groove 7 is opened in the circumferential direction of the container body 1 so that the tightening bolts 16 and 23 can be engaged and disengaged in the circumferential direction of the container body 1 .

The bottom plate member 2 is detachably attached to the lower end 1b of the container body 1 to close and hold the lower end 1b of the container body 1 and to function as a tilting means for tilting the container body 1.

Specifically, as shown in FIG. 5, the bottom plate member 2 includes a circular fitting portion 8 that fits and closes the lower end 1b of the container body 1, that is, the mounting portion 6a of the mounting support member 6, and the container body 1. A support flange portion 9 projecting outward from the outer circumference of the circle is integrally formed.

The circular fitting portion 8 is fitted to the lower end portion of the container body 1, that is, the mounting portion 6a of the mounting support member 6, at the boundary circumference of the circular fitting portion 8 with the support flange portion 9. An annular seal groove 8a (see FIG. 4) is provided for fitting and supporting an O-ring 10 that seals the fitting portion.

When the lower end portion 6a of the container body 1 is fitted into the circular fitting portion 8 of the bottom plate member 2 from above, the boundary portion between the two is sealed by the weight of the container body 1 via the O-ring 10. On the other hand, the bottom plate member 2 and the container main body 1 are relatively rotatable in the circumferential direction using the circular fitting portion 8 as a guide portion.

A pair of tightening bolts 16, 16 are threadably supported at positions of the support flange portion 9 corresponding to the engagement grooves 7, 7 of the mounting bars 6b, 6b of the container body 1 so as to be capable of tightening. there is

These tightening bolts 16, 16 can be engaged with and disengaged from the engagement grooves 7, 7 by relatively rotating the bottom plate member 2 and the container body 1 in the circumferential direction, as described above. By tightening the tightening bolts 16, 16 in the state of engagement with the engaging grooves 7, 7, the mounting bars 6b, 6b and the bottom plate member 2 are tightened and fixed. and the bottom plate member 2 are integrally fixed, and the lower end portion 6a (lower end 1b) of the container body 1 is closed.

As will be described later, when the container body 1 is turned upside down as shown in FIG. After the mounting bars 6b, 6b are released from the fastening and fixing state with respect to the bottom plate member 2, the container body 1 is rotated in the circumferential direction relative to the bottom plate member 2, thereby tightening the fastening bolts 16, 16 and By releasing the engagement state of the engagement grooves 7, 7, the container body 1 is removed from the bottom plate member 2, and the lower end portion 6a (lower end 1b) of the container body 1 is opened.

Further, the bottom plate member 2 is provided with a boosting tilting structure 11 for tilting the container body 1 by manual operation.

The force-increasing tilting structure 11 amplifies a small manually operable force to tilt the container body 1 filled with heavy concrete.

This force booster tilt structure 11 is located at a symmetrical position between a linear edge 2b that constitutes the tilting fulcrum P of the container body 1 provided on a part of the outer peripheral edge 2a of the bottom plate member 2 and the linear edge 2b of the outer peripheral edge 2a portion. A toggle clamp 15 is provided on the bottom plate member 15. By the clamping action of the toggle clamp 15, one side of the bottom plate member 2 is lifted by a predetermined dimension (lifting dimension) H and held.

The toggle clamp 15 constitutes a booster mechanism, and conventionally known various commercially available products can be applied. In the illustrated embodiment, as shown in FIGS. Further, it is mounted and fixed on the upper surface 2c of the bottom plate member 2 in the vicinity of the outer peripheral edge 2a, and the clamp arm 15a, which is a clamp action portion, is configured to protrude and retract vertically downward from the lower surface 2d of the bottom plate member 2. .

Specifically, as shown in FIGS. 1 and 5, when the clamp lever 15b of the toggle clamp 15 is tilted horizontally, the clamp arm 15a is retracted into the bottom plate member 2. 2, when the clamp lever 15b is turned about 180° and brought down to the opposite side horizontal position, the clamp arm 15a protrudes from the lower surface 2d of the bottom plate member 2 (see FIGS. 2 and 7), and the bottom plate member 2 is held while being lifted by the lifting dimension H (corresponding to the original clamping action of the toggle clamp 15), and as a result, the container body 1 is held while being tilted by the tilt angle θ with the tilt fulcrum P as the fulcrum (Fig. 2 and Fig. 7).

The inclination angle θ of the container body 1 is set to a predetermined inclination angle by adjusting the length of the clamp arm 15 a of the toggle clamp 15 .

The lid member 3 is detachably attached to the upper end 1a of the container body 1 and releasably closes the upper end opening of the container body 1. As shown in FIG.

The lid member 3 has a disc shape corresponding to the upper end 1a of the container body 1 and is structured so as to be fitted to the upper end 1a of the container body 1 . A handle 17 for hand-held operation is provided at the center of the upper surface of the lid member 3 .

The punch 4 is for removing the hardened concrete in the container body 1 after the test, and as shown in FIGS. Configured as the main part.

The pressing support bar 20 is detachably attached and fixed in a bridging manner to the upper end, that is, the lower end portion 6a of the container body 1 which has been turned upside down. Insertion holes 24, 24 for inserting and supporting a pair of tightening bolts 23, 23 are provided at positions corresponding to the engagement grooves 7, 7 (see FIG. 6).

The tightening bolts 23, 23 inserted through and supported by these insertion holes 24, 24 move into the engaging grooves 7, 7 by rotating the mounting bars 6b, 6b with respect to the container body 1 in the circumferential direction. In the state of engagement with the engagement grooves 7, 7, the tightening nuts 25, 25 are attached to the tightening bolts 23, 23 from below the mounting bars 6b, 6b. By screwing the tightening nuts 25 , 25 together and tightening, the pressing support bar 20 is fixed to the mounting bar 6 b and 6 b , and the pressing support bar 20 is fixed to the container body 1 .

The pressing bolt member 21 is threadedly supported by the pressing support bar 20 so as to be able to advance and retract in the axial direction of the container body 1. More specifically, the pressing support bar 20 has a bolt hole 26 at its central portion. The pressing bolt member 21 is screwed into and supported by the bolt hole 26 so as to be able to advance and retreat. The upper end portion 21a of the pressing bolt member 21 is a rotary operation portion in the form of a hexagonal bolt head, and can be rotated by various rotary tools.

The pressing disc 22 is movable in the axial direction within the container body 1 , and more specifically, has a circular shape with an outer diameter corresponding to the inner diameter of the container body 1 . It is slidable in the vertical direction along the inner diameter surface 1c of the.

At the central portion of the pressing disk 22, there is provided an engaging recess 27 with which the tip pressing portion 21b of the pressing support bolt member 21 is pressed and engaged.

Then, the pressing support bar 20, the pressing bolt member 21 and the pressing disk 22 are assembled on the upside down lower end 6a of the container body 1, and the punch 4 is assembled using an appropriate bolt turning tool or the like. When the rotary operation portion 21a of the pressing bolt member 21 is rotated in the pressing direction, the pressing bolt member 21 spirally moves vertically downward using the pressing support bar 20 as a support portion, and presses the pressing disk 22. As a result, the pressing disk 22 moves downward inside the container body 1, and pushes out the hardened concrete in the container body 1 from the lower end, that is, the upper end 1a of the container body 1, and discharges it.

A series of operations for conducting a concrete bleeding test specified in JCI-S-015-2018 using the bleeding test apparatus configured as described above is as follows.

(i) After filling a specified amount of a concrete sample (hereinafter referred to as a sample) into the container body 1, the container body 1 is covered with the lid member 3 and closed.

(ii) For 60 minutes from the first recorded time, absorb the water that has seeped into the upper surface of the concrete in the container body 1 every 10 minutes, and then water every 30 minutes until bleeding is no longer observed. Absorb.

In this case, when collecting the bleeding, it is necessary to incline the container body 1 by the inclination angle θ in order to facilitate the absorption of the water seeping out from the upper surface of the concrete. by the inclined structure 11;

That is, the clamp lever 15b of the toggle clamp 15, which is in the horizontal state shown in FIGS. 1 and 5, is turned about 180.degree. By operating the clamp lever 15b, the clamp arm 15a retracted into the bottom plate member 2 protrudes from the lower surface 2d of the bottom plate member 2, and one side of the bottom plate member 2 is lifted by the lift dimension H and held. As a result, the container body 1 is held at an angle of inclination .theta. about the inclination fulcrum P, which facilitates the absorption of water seeping out from the upper surface of the concrete.

When the water has been sucked up, the container body 1 is returned to the horizontal position. This operation is performed by moving the clamp lever 15b in the horizontal state shown in FIG. By rotating and returning the opposite side to the horizontal state, one side of the raised bottom plate member 2 is lowered, and the container body 1 is returned to the horizontal state.

(iii) Immediately after bleeding is no longer observed, weigh the total mass of the container body 1 and the sample.

(iv) After the above bleeding test is completed, take out the concrete that has hardened over time (about 8 hours) in the container body 1 .

As described above, the operation of removing the concrete from the container main body 1 is performed by removing the bottom plate member 2 from the container main body 1, opening the lower end 6a (lower end 1b) of the container main body 1, and then moving the container main body 1 up and down. In the inverted state, the punch 4 is assembled on the lower end portion 6a of the container body 1, and the pressing bolt member 21 is rotated in the pressing direction, thereby removing the hardened concrete in the container body 1 from the container body 1. The lower end, that is, the upper end 1a is pushed out and discharged.

As described in detail above, according to the bleeding test device of this embodiment, the following specific effects are obtained.

(a) Since the bottom plate member 2 that closes and holds the lower end 6a (lower end 1b) of the container body 1 is provided with a boosting tilting structure 11 that tilts the container body 1 by manual operation, the water level during the bleeding test is reduced. The work of tilting the container body 1 during the sucking work can be performed only by manual operation, and the conventional troublesome work of tilting the container and sandwiching a block is not necessary.

(b) Moreover, the force boosting inclined structure 11 of the bottom plate member 2 is composed of the linear edge 2b that constitutes the tilt fulcrum P of the container body 1 provided on a part of the outer peripheral edge 2a of the bottom plate member 2, and the outer peripheral edge 2a. and a toggle clamp 15 which is provided at a symmetrical position of the straight edge 2b and amplifies a small force to a large force. Since it is configured to be raised and held, the manual operation for tilting the container body 1 becomes a light one-touch operation, and the water sucking operation during the bleeding test can be performed more easily and lightly. can.

(c) Since the punch 4 is provided for removing the hardened concrete from the container body 1, the hardened concrete can be reliably removed from the container body 1 at the end of the bleeding test.

The above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this embodiment, and various design changes are possible within the scope thereof.

For example, the specific structures of the container body 1, the bottom plate member 2, the lid member 3, and the punch 4, which constitute the bleeding test device, are not limited to the illustrated embodiments as long as they have the same functions, and the design can be changed as appropriate. It is possible.

P Inclination fulcrum of container body θ Inclination angle of container body H Height of one side of bottom plate member 1 Container body 1a Upper end 1b of container body Lower end 2 of container body Bottom plate member 2a Outer peripheral edge of bottom plate member 2b Straight edge of bottom plate member 3 Lid Member 4 Puncher 6 Mounting support member 6a Mounting portion 6b Mounting bar 7 Engagement groove 8 Circular fitting portion 9 Supporting flange portion 10 O-ring 11 Boosting inclined structure 15 Toggle clamp 16 Tightening bolt 17 Knob 20 Supporting bar 21 Pressing Bolt member 21a Rotation operation portion 21b of the pressing bolt member Tip pressing portion 22 of the pressing bolt member Pressing disk 23 Tightening bolt 24 Insertion hole 25 Tightening nut 26 Bolt hole 27 Engagement recess

Claims (3)

It is in the form of a container used for a concrete bleeding test,
a cylindrical container body with both upper and lower ends open;
a bottom plate member detachably attached to the lower end of the container body to close and hold the lower end of the container body;
a lid member removably attached to the upper end of the container body;
a punch for removing concrete in the container body,
A concrete bleeding test apparatus, wherein the bottom plate member has a boosting tilting structure for tilting the container body by manual operation. In the bottom plate member, the bottom plate member has a linear edge that constitutes a tilting fulcrum of the container body at a part of the outer peripheral edge of the bottom plate member, and a toggle clamp is provided at a position symmetrical to the linear edge on the outer peripheral edge. 2. A concrete bleeding test apparatus according to claim 1, wherein one side of said bottom plate member is lifted and held by a predetermined dimension by the clamping action of said toggle clamp. The punch comprises a pressing support bar attached and fixed to the upper end of the container body in a bridge-like manner, and a pressing bolt member threadedly supported by the pressing support bar so as to be able to advance and retract in the axial direction of the container body. and a pressing disc axially movable within the container body,
2. A concrete bleeding test apparatus according to claim 1, wherein a tip portion of said pressing support bolt member is press-engaged with a center portion of said pressing disc.

Images