JP2000356578A - Method and apparatus for testing flowability of liquid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a subject method and apparatus capable of easily evaluating the flowability of a liquid material relatively high in viscosity in order to judge the feed properties thereof regardless of the kind of the liquid material. SOLUTION: In a flowability testing method for evaluating the flowability of a sample by allowing a predetermined vol. of a liquid material being a sample to flow down along a trough-shaped member 2 inclined at a predetermined angle from the upper end of the trough-shaped member and measuring the time required when the sample flows from the first mark position applied to the trough-shaped member 2 to the second mark position separated from the first mark position by a definite distance. This testing method is pref. performed by a flowability testing apparatus having the trough-shaped member 2 equipped with marks at least at two places in the length direction thereof, a support structure 3 for holding the trough-shaped member 2 to an angularly adjustable inclined posture and a sample container 22 housing a predetermind vol. of the liquid material being the sample.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for evaluating the fluidity of relatively viscous liquid materials, including liquid building and civil engineering materials such as grout mortar, grout concrete, sprayed mortar and sprayed concrete. The present invention relates to a fluidity test method and apparatus.

[0002]

2. Description of the Related Art Conventionally, when a liquid material including a material for construction and civil engineering is transported by a tubular body such as a hose or a gutter-like body, a test for evaluating its fluidity is performed in advance, and it is determined whether the transportability is good or not. It has been done. When the mortar is conveyed by a hose or the like, a fluidity / softness test using a flow table and a flow cone of JIS R5201, a PC grout test using a P funnel, a JA funnel or a J funnel, and a tilt tube grout viscosity measurement The fluidity is evaluated by conducting a fluidity / softness test using a vessel or other V funnel. When transporting concrete, flowability using a slump tester, an O funnel, a V funnel or an L flow tester of JISA 1101
A softness test is performed to evaluate its fluidity.

[0003]

When mortar or concrete is conveyed by a hose, the quality of the conveyability is greatly affected by the viscosity of the material. However, conventional JI
Flow table of SR5201 or JIS A
The fluidity / softness test using the slump tester 1101 was difficult to reflect the viscosity of the material in the measurement results, and was not suitable as a test for determining the transportability in the hose tube.

On the other hand, a P funnel, a JA funnel, a J funnel,
A funnel type test using a V funnel or an O funnel is suitable as a test for judging the transportability in a hose tube in that the viscosity of a material is easily reflected in a measurement result. However, these tests also have a problem that the measurement requires skill because it is very difficult to determine the timing at which the highly viscous material comes out of the funnel. Furthermore, the P funnel, the JA funnel, and the J funnel have a problem that a material having a large aggregate such as concrete cannot be tested due to their shapes, and the V funnel and the O funnel can test both mortar and concrete. However, there is a problem that a large number of samples are required because the instrument is very large, and the handling property is poor.

[0005] Another conventional test using a tilted tube grout viscometer is suitable for a test for evaluating the fluidity of mortar. However, a material containing a large aggregate such as concrete is not suitable. There is a problem that it cannot be tested. Further, the test using the L flow, which is another test, is a test for filling properties of concrete in principle, and thus is not suitable for a test for determining the transportability in a hose pipe.

An object of the present invention is to solve these problems,
An object of the present invention is to provide a fluidity test method and apparatus which can easily perform fluidity evaluation for judging the transportability of a liquid material having a relatively high viscosity regardless of the type of the material.

[0007]

According to the present invention, a liquid material having a predetermined volume, which is a sample, is caused to flow down from the upper end side of a gutter-like body inclined at a predetermined angle. After arriving at the first gauge point on the gutter,
A flowability test method is provided which measures the time required to arrive at a second reference position at a certain distance from the reference position, and evaluates the flowability of the sample with the length of time. In this fluidity test, a gutter-like body having reference points at at least two places in a longitudinal direction, a support structure for maintaining the gutter in an inclined position in which the angle can be adjusted, and a liquid material of a predetermined volume as a sample are contained. It can be suitably carried out by a fluidity test device having a sample container.

Hereinafter, a specific example of the present invention will be described.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
1 shows the device according to the invention in a partially disassembled state. The test apparatus 1 includes a gutter-like body 2 and a support structure 3 for supporting the gutter-like body 2 as main members. As an example, its assembly dimensions are about 450mm wide, 980mm long,
The height is about 850 mm, and the material is stainless steel.

The support structure 3 is attached to a base 4 which is a long member having a U-shaped cross section with its lower side opened, and four corners of the base 4, that is, ends on both sides in the longitudinal direction. And four lower legs 6, a lower support 6 erected on one end region of the base 4, and a higher support 7 erected on the other end region of the base 4. The base 4 is set in a horizontal posture by the legs 5. In this case, the base 4 does not necessarily need to be horizontal in a strict sense, but may be substantially horizontal.
The base 4 has a length corresponding to the length of the gutter 2, but is preferably slightly shorter than the gutter 2. The leg 5 is pivotally mounted on a side surface of the base 4 so as to be swingable and rotatable about a leg fulcrum 15 so as to limit rotation in one direction by a leg holding piece 8 attached to a lower surface of the base 4. It can be folded along the base 4. A protective cap made of resin may be attached to the tip of the leg 5 for the purpose of protecting the floor, preventing the test apparatus 1 from slipping, and the like.

The lower support 6 is provided with two vertical plates 9 attached to both side surfaces of the base 4 so as to be perpendicular to the upper surface of the base 4 and opposed to each other. And a lower support rod 10 laid at a predetermined height from the upper surface of the base 4. The vertical plate 9 is fixed by welding, for example,
The posture may be substantially perpendicular to the upper surface of the base 4, and may be attached to the upper surface of the base 4. The lower support bar is a round bar and is welded to the vertical plate 9.

The high support 7 is composed of two long columns 11 provided on both sides of the base 4 so as to be opposed to each other at right angles to the upper surface of the base 4 and between the columns 11. It has a high support bar 12 which is detachably mounted at a position higher than the low support bar 10, and an upright holding plate 13 mounted in a lower region between the columns 11 so as to be in contact with the upper surface of the base 4. The column 11 is pivotally mounted so as to be swingable about a fulcrum pin 16 on the side surface of the base 4. Upright holding plate 13
Is connected to the columns 11 immovably, and is welded to the edge of the column 11 located on the opposite side to the lower support 6,
The column 11 is prevented from rotating in a direction opposite to the lower support 6. Thereby, the column 11 can support the gutter-shaped body 2 so that it does not fall down even if it receives a horizontal load from the lower support 6 side. Also, the support 11
The fulcrum pin 16 for mounting the
, And the support 11 can be folded along the base 4 without interfering with the legs 5.
Further, a plurality of holes 14 are formed in the column 11 at predetermined intervals in the length direction, so that the height position of the high-order support rod 12 can be adjusted. The column 11 can be attached to the base 4 by various other methods, but a method considering a compact storage size as in a specific example is preferable.
The high support rod 12 and the hole 14 are snap-on type, that is, the high support rod 12 is deformed when it is put into the hole 14 and returns to its original state when it is inserted. Such a structure can be appropriately adopted. It will be understood by those skilled in the art that the attachment may be performed by, for example, hooking the support 11 having a hook portion, instead of the attachment method penetrating the hole 14.

A gutter-like body 2 formed in a semi-cylindrical shape having a flange at a longitudinal edge has two reference points located at a fixed distance in the longitudinal direction, and a low point provided at a lower end side. Holder 1
7 and a high-order receiver 18 attached to the upper end side. The reference point is a portion that clearly indicates the position in the length direction of the gutter-like body 2. In this specific example, the first reference point is a line 20 attached to the upper surface of the flange, and the second reference point is a gutter-like body at the lower end 19, but other predetermined parts are referred to as reference points. You can also. The lower receiving member 17 is a relatively narrow thin plate formed in a U-shaped cross section, and is mounted on a flange portion on the lower surface on the lower end side of the gutter-like body 2 with its upper side open. Lower support 17
Has a lower support rod 10 perpendicular to the longitudinal direction of the gutter-like body 2 at the bottom.
And a slit-shaped notch that engages the The high-order receiving member 18 is a wide thin plate formed in a U-shaped cross section, and is mounted on a flange portion on the back surface on the upper end side of the gutter-like body 2 with its upper side open. The high-order receiving member 18 has a flat bottom that can abut on the high-order support rod 12 at any position thereof, protects the semi-cylindrical bottom of the gutter-like body 2, and tilts in a plane perpendicular to the length direction. To provide stability. Gutter 2
Need not have a semi-cylindrical shape, and can have, for example, a U-shaped cross section. The gutter 2 has a semi-cylindrical shape with a radius of about 50 mm and a length of about 880 mm, for example, and the wire 20 is attached to a flange portion 400 mm above the lower end 19 of the gutter.

As shown in FIG. 2, the lower support bar 10 engages with the notch of the lower support 17 to support the lower end, and the higher support bar 12 engages with the flat bottom of the higher support 18. By supporting the upper end side, the gutter-like body 2 is maintained in the inclined posture. At this time, the vertical plate 9 and the strut 11 prevent the gutter-like body 2 from dropping in the lateral direction. The gutter-shaped body 2 can change the inclination angle about the lower support rod 10 as a pivot point by selecting an arbitrary hole 14 to which the higher support rod 12 is attached. The gutter 2 is installed at an inclination angle suitable for the test in consideration of the viscosity of the sample and the like, but it is necessary to conduct a test with a standard sample or the like having good transportability in advance and determine a suitable inclination angle. Can be. In addition to the specific example, the gutter 2 is
It can be supported in various ways as would be understood by those skilled in the art, such as screwed to a pivot point. The gutter 2 is
For example, the inclination angle is set to 18 °, and at a position where the lower end 19 of the gutter-like body extends outside beyond the end of the base 4, its height is about 3 °.
It can be installed to be 80 mm.

The test apparatus 1 comprises a sample container 23 for accommodating a sample 25 which is a fluidity test object, a sample container table 21 on which the sample container 23 is loaded and arranged at the upper end of the gutter-shaped body 2, And a sample receiving container 22 disposed below the lower end 19 for collecting the dropped sample 25. Sample container 23
Has a cylindrical side with a diameter smaller than the cylindrical diameter of the gutter 2 and a square bottom plate with one side larger than the cylindrical diameter of the gutter 2. On the inner surface of the side, a volume scale 24 is provided to facilitate preparing a predetermined volume of the sample 25. The sample container table 21 is a square plate having a surface slightly larger than the bottom plate of the sample container 23 to be loaded, and is fixed to the lower surface of the upper end of the gutter 2 in a horizontal state. On the three sides of the square plate other than the sides fixed to the gutter-like body 2, folds for preventing the sample container 23 from falling off are provided, so that the sample container 23 can be stably loaded. When the sample 25 is caused to flow down, the sample container 23 is disposed at the upper end portion of the gutter 23 and falls down toward the lower end 19 of the gutter. At this time, the blank portion of the bottom plate of the sample container 23 serves as a hook which is hooked on the edge of the upper end of the gutter-shaped body 2, and the sample container 23 is maintained at the upper end portion of the gutter-shaped body 2 without sliding down. The sample container 23 has, for example, a square bottom plate having a side of 110 mm and a diameter of 92 mm and a depth of 17 mm fixed thereon.
It consists of a cylindrical side of 0 mm and the height from the bottom plate is about 15
A capacity scale 24 is provided on the inner surface of the side of 0 mm. The method of installing and maintaining the sample container 23 is, for example, the sample container 2
3 can be fixed to the upper end portion of the gutter-like body 2, an outlet is provided at the lower part of the sample container 23, and the sample 25 can flow down therefrom.

The procedure of the fluidity test using the test apparatus 1 is as follows.
It is as follows.

First, before starting the test, the groove of the gutter 2 is wetted with water using a brush or the like to stabilize the state of the groove. Next, the sample container 23 accommodating the sample 25 is placed on the sample container table 21, and the sample 25 is caused to flow down by falling down toward the lower end 19 of the gutter-shaped body. At this time, in order to release the sample 25 all at once,
In order to stabilize the initial speed of 5, the sample container 23 is set at a predetermined speed,
That is, it is preferable to fall over as quickly as possible and at a constant speed. The sample container 23 of this specific example can be turned over with a small force using one side of the bottom plate as a fulcrum.
After the fall, it is maintained at the upper end portion, so that the work has a margin and the fall speed can be easily controlled. Usually, while the sample 25 moves a distance from the upper end portion of the gutter-shaped body 2 to the first gauge point position, a slight variation in the falling speed of the sample container 23 is absorbed, so that the speed control is not performed. It doesn't have to be strict. Next, when the sample 25 flows down and its tip arrives at the line 20, the time measurement is started with a stopwatch prepared in advance, and when it reaches the lower end 19 of the gutter-like body, the measurement is finished (FIG. 2 shows the state of the test apparatus 1 in the middle). The fluidity of the sample 25 is evaluated by comparing the measurement result with a reference value. The reference value is a suitable value determined by conducting a test in advance with a standard sample having good transportability.
For example, in the fluidity test of the polymer grout concrete or the sprayed polymer mortar when the inclination angle of the gutter 2 is set to 18 °, the transferability in the hose pipe becomes good when the measurement result is 6 ± 2 seconds. It is.

[0018]

According to the present invention, the following effects can be obtained. (1) It is possible to accurately judge whether or not mortar, concrete, or other liquid materials can be transported when they are transported by a hose or the like. (2) Mortar, concrete or other liquid materials can be tested with the same method and equipment. (3) Skill in the test is not required, and the number of samples required for the test is reduced, thereby reducing the test time and the test cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a test apparatus according to the present invention is partially exploded.

FIG. 2 is a perspective view of a test apparatus according to the present invention.

FIG. 3 is a perspective view showing a state where a test is being performed by the test apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Test apparatus 2 Gutter 3 Support structure 4 Base 5 Leg 6 Low support 7 High support 8 Leg holding piece 9 Vertical plate 10 Low support rod 11 Post 12 High support rod 13 Upright holding plate 14 Hole 15 Leg support 16 fulcrum pin 17 low-level support 18 high-level support 19 lower end of gutter-shaped body 20 line 21 sample container base 22 sample receiving container 23 capacity container 24 capacity scale 25 sample

Claims (11)

[Claims] A liquid material having a predetermined volume, which is a sample, is caused to flow down from an upper end side of a gutter-like body inclined at a predetermined angle, and the sample arrives at a first reference point position attached to the gutter-like body. And measuring the time required to arrive at a second gauge point located at a certain distance from the first gauge mark, and evaluating the fluidity of the sample with the length of time. 2. The flowability test method according to claim 1, wherein the second reference point is a lower end of the gutter. 3. The sample container according to claim 1, wherein a predetermined volume of the liquid material is accommodated in the sample container, the sample container is disposed at an upper end portion of the gutter, and the sample is caused to flow down by falling over at a predetermined speed. Flowability test method described in 1. 4. A gutter-like body having at least two reference points in a longitudinal direction, a supporting structure for maintaining the gutter in an inclined posture capable of adjusting an angle, and a sample containing a predetermined volume of a liquid material as a sample A sample contained in the sample container is allowed to flow down from the upper end portion of the gutter-like body, and the time from when the sample arrives at the first gauge point position to when it reaches the second gauge point position is determined. A fluidity test device that can measure and evaluate the fluidity of a sample with this length of time. 5. The fluidity test apparatus according to claim 4, wherein one of the reference points is a lower end of the gutter. 6. The gutter-like body according to claim 4, wherein the gutter-like body is formed in a semi-cylindrical shape having a flange at a longitudinal edge, and at least one of the reference points is attached to the upper surface of the flange. Flowability test equipment. 7. The sample container according to claim 4, wherein the sample container is maintained at an upper end portion of the gutter at least during and after the flow of the sample.
Fluidity test device described in the paragraph. 8. A sample container table for arranging a sample container at an upper end portion of the gutter-like body, the sample container having a hook, and allowing the sample container placed on the sample container table to flow down the sample. The sample container is maintained at the upper end portion of the gutter-like body by the hook of the sample container hanging on the upper end of the gutter-like body when the sample container is turned over toward the lower end of the gutter-like body. 7. The flowability test apparatus according to 7. 9. The support structure has a base having a length corresponding to the length of the gutter, a leg attached to the base and installed in a horizontal posture, and one end of the base. A lower support mounted on the base, and a higher support mounted on the other end area of the base, wherein the lower support and the higher support are each of a gutter-shaped body on the base. The fluidity test apparatus according to any one of claims 4 to 8, wherein the gutter-like body is maintained in an inclined posture by supporting a lower end side and an upper end side. 10. The high-level support has two long columns that are erected at right angles to the upper surface of the base, and a high-level support bar that is detachably mounted between the columns. A plurality of high support rod mounting portions are formed at intervals in the length direction, and the inclination angle of the gutter-like body can be changed by adjusting the height position of the high support rod. Item 10. A flowability test apparatus according to Item 9. 11. The leg and the high support are pivotally attached to a base so as to be swingable and rotatable within a predetermined angle range, and can be folded along the base.
Or the fluidity test apparatus according to claim 10.