JPS61296269A - Apparatus for simply testing consolidation - Google Patents

Abstract

PURPOSE:To enable a consolidation test simple to handle and testing a large amount of a sample at once, by inserting an object to be inspected between a lower press board and an upper press board and sliding both press boards along the inner surface of a cylinder main body. CONSTITUTION:An object to be inspected is inserted between a lower press board 4 and an upper press board 7 and the press board 7 is clamped by a clamp rod 9. When predetermined load was applied to the object to be inspected, that is, when, the graduations line of a predetermined wt. of a graduations rod 5 is exposed from a lower cap 2, clamping is stopped. Because predetermined load can be applied to the object to be inspected only by rotating the clamp rod 9, operation is extremely simple and a special tool or measuring device becomes unnecessary. Because this apparatus has a small size and the load applied to the object to be inspected does not change even if said apparatus is made vertical or horizontal, the apparatus can be stacked in a multistage fashion, for example, in a thermostatic tank and the consolidation test of a large amount of a sample can be performed at once.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a test device suitable for simple consolidation tests.

[Prior art]

Consolidation of granular solid fertilizers, such as single fertilizers such as urea, ammonium sulfate, and ammonium phosphorus, and compound fertilizers, usually occurs when packaging bags are piled up several dozen levels high for several months. Since caking properties vary greatly depending on moisture content, raw material composition, storage conditions, etc., the following tests are usually required to determine whether the fertilizer will caking or not.

1) Pack the fertilizer in a 20 kg regular fertilizer bag (polyethylene, etc.). 2) Stack several sample bags vertically,
For example, a piece of plywood or the like is placed on top of this, and a load is applied to it using sandbags, cleats, etc. 3) Normally, if the load is 9 bags x 30 bags in 20, the load will be 6007C9. 4) The period of continued accumulation while avoiding wind and rain is normally 1°39.6 months. 5) After a predetermined period of time has elapsed, the bag is opened and the compaction strength, for example, compressive strength and soil hardness meter are measured.

In order to omit the above-mentioned complicated tests, the simple method commonly used at present is based on the Adams-Andross method (Adma & Rer, sb method). It has been known. In FIG. 1, a cap b is placed on the bottom of a cylinder a having an inner diameter of 2 itn, for example. A predetermined amount of fertilizer C is put into this, a cylinder d with an outer diameter of a little less than 2 mm is inserted from the top, and a predetermined pressure is kept on the bottom of the cylinder at a constant 30°C for 7 days to determine the crushing strength of the consolidated arms that are formed. The solidification property of the sample can be determined by measuring the solidity of the sample.

[Problems to be Solved by the Invention] Problems of conventionally employed simple consolidation test devices, such as those mentioned above, are as follows.

1) Always carry a large amount of lead ingots of known weight (
There is a need. 2) Since they cannot be stacked vertically, a large amount of space is required for testing in large quantities. 3
) Testing cannot be done in a constant temperature tank; a space like a constant temperature room is required. 4) Even if the temperature is maintained at a constant temperature of about 30° C. for about - weeks, results that correlate with the actual solidification property cannot be obtained. For example, regarding 4), the relationship between the degree of consolidation (kgAd) of 2O cough deposited for 3 months at a load of 9 to 600 and the degree of consolidation (kgAr!) of the simple method is shown in the comparative example (Fig. 2) described later. ) As shown in (), it cannot be said that the accuracy is sufficient.

[Means for solving problems]

The inventors of the present invention have conducted repeated studies with the aim of being able to maintain a constant load at all times, be easy to handle, and be able to conduct many tests at the same time, as well as accelerated tests. The present invention was achieved by discovering that this can be easily achieved by keeping the temperature constant and using a scale rod, and further by discovering that accelerated testing is also possible by adjusting the temperature of the test device.

That is, in the first aspect of the present invention, a lower cap 2 and an upper cap 3 are attached to the L end of the cylinder body by threading, and a lower presser plate 40 and a scale rod 5 are attached to the center of the lower cap 2 with a spring. 6, and in the center of the upper cap 3, the rod part 8 of the upper presser plate 7 and the rod 9 (for tightening to match) are attached by threading, and the lower presser plate 4 and the upper presser plate 7 are connected to the cylinder. The lower pressing plate 4 is in a state where it can slide on the inner surface of the main body l.
This is a simple consolidation test device in which a sample is charged between the upper holding plate 70 and the upper holding plate 70.

Furthermore, the second aspect of the present invention is a simple solidification test device comprising a constant temperature tank and equipment for adjusting the internal temperature of the constant temperature tank, in which one or more of the simple solidification test devices described above can be housed.

A method of using the simple consolidation test device of the present invention will be explained based on FIG. 3. A lower cap 2 is attached to the cylinder body 1, a spring 6 is inserted therein, and then the lower cap 2 is attached so that the scale rod 5 of the lower pressing plate 4 passes through the center of the lower cap 2.

The scale rod 5 is attached to facilitate the movement of the lower pressing plate 4 and to know the displacement of the spring 6 from the outside. Therefore, it is effective to measure in advance the length of the rod 5 protruding outside with respect to the load applied to the lower holding plate 4 in order to know the load applied to the subject later.

Next, a substance to be tested, such as chemical fertilizer 20-, is introduced. The upper presser plate 7 is placed on this, the upper cap 3 is placed on it, and the upper presser plate 7 is tightened with a tightening rod 9. In this case, it is convenient if the end of the tightening rod 9 is square or hexagonal and the tightening operation is performed by attaching a suitable jig and rotating it. In this way, when a predetermined load is applied to the subject, for example, when the scale line of the predetermined load is exposed from the lower cap 2, tightening is stopped.

The spring 6 used in the above-mentioned simple consolidation test device is appropriately determined depending on the properties of the substance to be subjected to the consolidation test, and varies depending on the required load range. Normally 5-15JC9f
//The repulsive force of cIrL is sufficient.

A Teflon sheet or the like is placed on the lower holding plate 4 and the upper holding plate 7 as a means to facilitate the removal of the sample from the cylinder body 1 after the pressure test using the simple consolidation test device.
If a Teflon sheet or the like is interposed on the inner wall of the cylinder main body 1 if necessary, the sample can be taken out more easily. In addition, depending on the nature of the substance to be tested, it may be affected by water absorption or deterioration due to the intrusion of moisture in the external atmosphere. can be prevented.

The approximate size of the above-mentioned simple consolidation test device varies depending on the type of target test substance, but if the approximate specifications for chemical fertilizers etc. are shown, the length of the cylinder body 1 is is about 20mm, inner diameter of cylinder body 1 is 3c
It is sufficient to have a Tt or a sample filling amount of about 20 -.

The simple solidification test device loaded with the sample as described above is placed in a preset cooling tank and left for, for example, one week. Temperature baths use a timer to change the temperature settings, for example, every 24 hours, and the temperature settings are set to 10°C and 50°C as the lowest and highest temperatures during the day, respectively. It is preferable. This allows you to
Repeated stress of 10°C and 50°C is applied to the subject.

After a predetermined period of time has elapsed, the cylindrical solidified specimen is removed from the apparatus and its crushing strength and the like are measured to determine the solidification properties of the specimen. Commonly used crushing strength tests include:
The following methods are adopted.

Consolidation strength using the Yamanaka soil hardness tester: A cone is placed against a flat surface by 9 people, and the force of the spring that balances the pressure of the soil layer against the charge is measured as the hardness (kg/crd). It is used to know the density.

If it is dense and does not allow four people at all, the hardness C1 will be 0 if there is no total heat resistance.

It is useful for knowing the hardness of the disk-shaped consolidated arm.

Consolidation strength using Kiya type hardness tester: This is the same as the commonly used crushing test method, in which the test piece is compressed in the diametrical direction and crushed to break, and the load per unit area until the test piece collapses is measured. Hardness (kq
, M).

〔Effect of the invention〕

In the above-described simple consolidation test device of the present invention, a predetermined load can be applied to the test specimen simply by rotating the tightening rod 9, so the operation is extremely simple and no special tools or measuring instruments are required. It is. In addition, because of their small size, the load applied to the test specimen does not change whether it is held vertically or horizontally, so it can be stacked in multiple layers in a heating tank, making it possible to investigate the solidification properties of a large number of samples at once. be able to. In addition, the hardness of the test piece taken out from the temperature tank by the Kiya type hardness meter is good, for example, the result of depositing the test sample at a load of 600 to 9 for 3 months and measuring the hardness with the Yamanaka type soil hardness meter. There is a correlation, and it is inferred that this simple consolidation test device better approximates the three-month long-term deposition test.

〔Example〕

Nitrogen (N): Phosphoric acid (P2O5): Pressure (K
Samples were prepared by adding various anti-caking agents to a urea-based chemical fertilizer with a ratio of 15% (2O): 15% = 15%.

1) This was placed in a 20 to 9 polyethylene bag, sealed, and deposited. The load was 600 kg (Conch'J), and the deposition period was 3 months. The installation location is outdoors. After 3 months, the bag was opened and the consolidation strength was measured using a Yamanaka soil hardness meter. 2)
The fertilizer 20- was placed in the simple consolidation test device of the present invention, and subjected to repeated temperature stress of 10°C under load 15 for a period of 97 days.
It was stored under conditions of ~50°C/24hrs.

After 7 days had passed, the consolidated arms were taken out and the crushing strength was measured using a Kiya type hardness tester.

The results of 1) and 2) are as follows, according to the above table in Table 1. If the results of the simple consolidation test device are 2.3 months and the results of the deposition test are ν, then the regression line for 2 of y is:
(See Figure 4) y = 0.1142 X −-0,
0233 and the correlation coefficient r is r = 0.9433, which shows that the correlation is quite high.

[Brief explanation of drawings]

FIG. 1 is an example of a cross-sectional view of a conventionally known simple consolidation test device, and FIG. 2 is an example of test results using the device. FIG. 3 is an example of a sectional view of a simple consolidation device according to the present invention, and FIG. 4 is an example of test results thereof. 1° in the figure. , cylinder body 206. cap 381
．． Cap 400. Lower press plate 500.
Scale rod 660. Spring 700. Upper holding plate 808. Rod part 900. Tighten with a rod

Claims (2)

[Claims] (1) A lower cap 2 and an upper cap 3 are attached to the ends of the cylinder body 1 by threading, and the scale rod 5 of the lower presser plate 4 is attached to the center of the lower cap 2 through a spring 6. A tightening rod 9 that fits with the rod part 8 of the upper holding plate 7 is attached to the center of the upper cap 3 by threading, and the lower holding plate 4 and the upper holding plate 7 are attached to the inner surface of the cylinder body 1. A simple cohesion test device which is in a slidable state and in which a sample is charged between a lower presser plate 4 and an upper presser plate 7. (2) A lower cap 2 and an upper cap 3 are attached to the ends of the cylinder body 1 by threading, and the scale rod 5 of the lower presser plate 4 is inserted through the center of the lower cap 2 via a spring 6. A tightening rod 9 that fits with the rod portion 8 of the upper holding plate 7 is attached to the center of the upper cap 3 by threading, and the lower holding plate 4 and the upper holding plate 7 are attached to the inner surface of the cylinder body 1. A heating tank in which one or more of the simple solidity test devices can be slid and a sample is charged between a lower holding plate 4 and an upper holding plate 7 can be installed, and the temperature inside the heating tank can be adjusted. A simple consolidation test device consisting of equipment.