JP3312131B2 - Cement content test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement content test apparatus for measuring the content of cement such as cement and coal contained in a target soil.

[0002]

2. Description of the Related Art A cement stabilization method is known as a method for improving the engineering properties of soil by mixing cement, and the use thereof has recently been increasing. In this cement stabilization method, it is important to collect a sample of treated soil just after cement mixing as one of quality control and to test whether the cement is mixed in a predetermined amount and uniformly,
Well done.

In the conventional test method, since cement contains a large amount of calcium in a fixed ratio, the cement content of the treated soil is determined by analyzing calcium by a hydrochloric acid dissolution-chelate titration method, a hydrochloric acid dissolution-atomic absorption method, or the like. Is often done.

[0004] However, these chemical methods have high accuracy, but have the drawback of requiring a relatively large amount of equipment, time and skill.

Therefore, in recent years, the hydrochloric acid heat of dissolution method has been used as a test method for the cement content with few such defects. In this method of dissolving hydrochloric acid, when hydrochloric acid is added to the target soil, the temperature of the target soil rises due to the heat of reaction, and as shown in FIG. This is a method of measuring the cement content using a property (regression function) that increases in proportion.

[0006]

However, in order to accurately measure the cement content, it is necessary to accurately measure the amount of hydrochloric acid added and to accurately measure the temperature. However, since the means for solving the problem has not been solved, a test apparatus using the heat of dissolution of hydrochloric acid has not been put to practical use.

Accordingly, the present invention has been made in view of the above circumstances, and provides a cement content test apparatus capable of simply and quickly measuring the content of cement contained in a target soil collected on site. The purpose is to do.

[0008]

According to a first aspect of the present invention, there is provided a cement content test apparatus, wherein hydrochloric acid is added to a target soil sampled at a site and mixed, and a temperature rise of the target soil is detected. A cement content test apparatus for measuring the content of cement contained, wherein hydrochloric acid is added to the target soil.
Dispensing means for adding and mixing, storage means for previously storing relational information between the content of the cement relative to the target soil and the temperature increase, and a temperature after mixing of the target soil to which the hydrochloric acid is added and mixed. Detecting the maximum value, detecting means for detecting the temperature increase from the difference between the maximum value and the equilibrium temperature before mixing, and referring to the relationship information stored in the storage means based on the temperature increase detected by the detection means. , have a, calculating means for determining the content of cements contained in the target soil, the dispensing
The means consists of a hydrochloric acid container containing hydrochloric acid and a mixture containing the target soil.
A dispensing line connecting the combined container, the hydrochloric acid container and the dispensing tube
A return line connecting the middle point of the
A dispensing pump interposed on the hydrochloric acid container side from the intermediate point, and the dispensing pump
The hydrochloric acid in the hydrochloric acid container is dispensed by the pump through the pipe
Pump, middle point of pipe line, return line to hydrochloric acid container
After performing the return operation, the pipetting line is
Control means for dispensing a predetermined amount of hydrochloric acid through the mixing container
And characterized in that:

Further, in the cement content test apparatus according to the second aspect, hydrochloric acid is added to the target soil collected at the site,
A cement content test apparatus for measuring the content of cement contained in the target soil by detecting the temperature increase, wherein dispensing by adding and mixing hydrochloric acid to the target soil.
Means, storage means for storing in advance the relationship information between the content of cement and the temperature increase relative to the target soil for each type of cement, input means for inputting the type of cement, and the hydrochloric acid Detecting means for obtaining the maximum value of the temperature of the added and mixed target soil after mixing, and detecting the temperature increase based on the difference between the maximum value and the equilibrium temperature before mixing; based on the temperature increase detected by this detection; Calculating means for determining the content of cement contained in the target soil by referring to the relation information corresponding to the type of cement input by the input means among the relation information stored in the storage means.
The dispensing means includes a hydrochloric acid container containing hydrochloric acid and a target soil.
A dispensing line connecting a mixing vessel containing
A return line connecting the container and an intermediate point of the pipetting line;
Dispensing pon interposed on the hydrochloric acid container side from the middle point of the dispensing pipe
And the hydrochloric acid in the hydrochloric acid container by the dispensing pump.
Through the dispensing pump, the middle point of the dispensing line, and the return line.
After returning to the hydrochloric acid container by the
A predetermined amount of hydrochloric acid is dispensed into the mixing vessel through the dispensing pipe
And control means for performing the control .

[0010]

According to the cement content test apparatus of the first aspect, when hydrochloric acid is added to and mixed with the target soil collected at the site, the temperature of the target soil rises due to the reaction heat, and the detection means detects the target soil. The maximum value of the temperature after mixing with hydrochloric acid is determined, and the temperature rise is detected from the difference between this maximum value and the equilibrium temperature before mixing. The calculating means refers to the related information stored in the storage means based on the temperature rise detected by the detecting means, and obtains the content of cement contained in the collected target soil. The dispensing means uses a dispensing pump to
The acid passes through the dispense line, the dispense pump, the midpoint of the dispense line,
After performing the operation of returning to the hydrochloric acid container via the return line,
A predetermined amount of hydrochloric acid into the mixing vessel through the pipe
Dispensing removes bubbles from hydrochloric acid in the hydrochloric acid container.
You.

According to the cement content test apparatus of the second aspect, when the type of cement is inputted by the input means, the calculating means causes the detecting means to mix hydrochloric acid in the target soil.
Determine the maximum value of the temperature after mixing, and calculate the maximum value and the equilibrium temperature before mixing.
Of the cement content contained in the target soil sampled by referring to the relationship information corresponding to the type of cement inputted from among the relationship information stored in the storage means based on the temperature rise detected from the difference from the temperature. Ask for.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a cement content test apparatus according to the present invention, and FIG. 2 is a schematic configuration diagram thereof.

As shown in FIG. 1, the apparatus 1 has a substantially rectangular parallelepiped apparatus body 2, a mixing means 3 and an operation panel section 4 disposed on the front side of the apparatus body 2, and a box 15. 2, a hydrochloric acid container 6 containing the dispensing means 10 and the hydrochloric acid 5, a mixing container 8 such as a 300 ml dewar containing the target soil 7, a room temperature T ₁ , and hydrochloric acid in the hydrochloric acid container 6. temperature T ₂ of 5, first detecting respectively the temperature T ₃ of the target soil 7 of the mixing vessel 8, the second and third temperature sensor (detecting means) 9a, 9b, control and 9c, each part of the device 1 The dispensing means 10 is for aspirating a predetermined amount of hydrochloric acid 5 from the hydrochloric acid container 6 and dispensing it into the mixing container 8.

The dispensing means 10 includes a dispensing line 100 connecting the hydrochloric acid container 6 and the mixing container 8 and a return line 1 connecting the hydrochloric acid container 6 and an intermediate point 100a of the dispensing line 100.
01, a dispensing pump section 104a interposed on the hydrochloric acid container 6 side from an intermediate point 100a of the dispensing pipe 100, and a return pipe 1
01 and the dispensing line 10
0, which is interposed on the mixing vessel 8 side from the midpoint 100a
Solenoid valve 103, a dispensing controller 105 (see FIG. 4) for controlling the dispenser 104, and the first and second solenoid valves 1
02 and 103 (see FIG. 4).

The dispenser 104 includes the dispensing pump 104a, a dispensing motor 104b for causing the dispensing pump 104a to perform a pumping operation, and a sensor 104c for detecting the position of the dispenser. I have.

On the other hand, the mixing means 3 comprises a mixing motor 32 for rotating a mixing blade 31 provided at the tip of a mixing shaft 30.
And the dispensing pipe line 1 on the mixing vessel 8 side with respect to the second solenoid valve 103.
00b, a supporting member 33 that integrally supports the mixing shaft 30 and the third temperature sensor 9c so as to be able to move up and down, an elevating motor 34 that moves the supporting member 33 up and down, and a mixing motor drive unit 35 that drives the mixing motor 32 ( A lifting motor drive unit 36 (see FIG. 4) for driving the lifting motor 34;
An upper limit position sensor 37a and a lower limit position sensor 37b for detecting an upper limit and a lower limit of the elevating operation of the support member 33, respectively, and the target soil 7 in the mixing vessel 8 to which hydrochloric acid 5 is added.
Are mixed and stirred.

Next, the operation panel section 4 will be described with reference to FIG. FIG. 3 is a front view of the operation panel unit 4.
As shown in FIG.
Upper and lower limit lamps 40a and 40 respectively indicating the upper and lower limits of the raising and lowering operation of the support member 33 due to
b, a dispenser operation lamp 40c indicating that the dispenser 104 is operating, a mixing abnormality lamp 40d indicating a mixing abnormality, and a lifting abnormality lamp 40e indicating that the lifting operation by the lifting motor 34 is abnormal. Further, a data lamp 41a, a calibration lamp 41b, a correction lamp 41c, a test lamp 41d, and a single-action lamp 41e respectively indicating that each mode (data mode, calibration mode, correction mode, test mode, and single-action mode) is being executed. A start lamp 41f indicating start and a power lamp 41g indicating power-on are provided. In addition, a main switch 42 for turning on the power to the apparatus 1 and a display / input unit (input means) for performing various displays and inputs. 43 and a printer 13 are provided.

Here, the display / input unit 43 is a display unit 43 such as an LCD (liquid crystal display) which is overlapped and arranged.
a and an input unit 43b such as a touch sensor. Further, a menu, a numeric keypad, and the like are displayed on the display unit 43a, and by pressing a portion of the input unit 43b corresponding to an item in the menu or a display position of the numeric keypad,
Input operation can be performed.

FIG. 4 is a block diagram showing a control system according to this embodiment.

The apparatus 1 has a control means 11 which includes the lifting motor 34 and the mixing motor 3.
2 are connected via a lifting motor drive unit 36 and a mixing motor drive unit 35, respectively, and the upper limit position sensor 37a,
The lower limit position sensor 37b and the operation panel unit 4 are connected, the dispenser 104 is connected via a dispenser controller 105, and the first and second solenoid valves 102 and 10 are connected.
3 is connected via a valve drive unit 106, and the first, second and third temperature sensors 9a, 9b, 9c
/ D converters 12a, 12b, and 12c,
Further, a printer 13 is connected via a printer controller 14.

The control means 11 includes a CPU (arithmetic means) 110 for controlling each part of the apparatus 1, a program memory 111 storing a control program, and a memory (storage means) 112 storing various data. Is provided.

The CPU 110 has a program memory 111
Each mode (data mode, calibration mode, correction mode, test mode, and single-acting mode) is executed based on the control program stored in. In data mode,
By type of cement etc., and stores the maximum temperature T _max, and mixed prior to the equilibrium temperature T ₃ after mixing and stirring in the known content of such target earth 7 and cement in the memory 112. In the calibration mode, a regression function (relationship information) 435 'of the temperature increase ΔT as shown in FIG. 6 based on the equilibrium temperature T ₃ and the maximum temperature T _max before mixing at each cement content for each type of cement or the like.
And the deviation 437 are calculated for each type of cement or the like, stored in the memory 112, and displayed on the display unit 43a. In the correction mode, the data stored in the memory 112 is corrected. In the test mode, the type of such cements has been found, if the content of the cement contained in the target soil 7 is unknown, elevated temperature from the maximum temperature T _max after mixing and stirring equilibrium temperature T ₃ before mixing ΔT is determined, and the content is determined with reference to the regression function 435 ′. The single action mode is a mode used for maintenance and adjustment.

The memory 112 stores in advance the maximum temperature T _max after mixing and stirring and the equilibrium temperature T ₃ before mixing at a known content of the target soil 7 and the cement etc. for each type of cement and the like, and the CPU 110 The regression function 435 ′ and the deviation 437 of the temperature rise ΔT obtained as shown in FIG.
And the like are stored for each type of cement or the like.

Next, the operation of the present embodiment will be described with reference to FIGS. 5 to 7 and the flowchart shown in FIG.
Here, a diagram showing FIG. 5 and 6 showing a display example of the input and display unit 43, the temperature curve of the temperature T ₃ after 7 mixture. Note that the hydrochloric acid container 6 contains the hydrochloric acid 5.

First, the operator stores a predetermined amount (for example, 100 g) of the target soil 7 collected at the site containing, for example, cement in the mixing container 8.

Next, when the operator turns on the power of the apparatus 1 by pressing the main switch 42 of the operation panel section 4,
When the power is turned on, the power lamp 41 of the operation panel unit 4 is turned on.
g lights up.

The CPU 110 of the control means 11 reads out a control program from the program memory 111 and controls each part of the apparatus 1 to execute each mode.

The CPU 110 includes a display / input unit 43
"Data input", "Data correction",
A menu screen consisting of items such as "test" is displayed.

The operator selects an item by pressing a portion of the input section 43b corresponding to a display position of each item on the menu screen. For example, if no data has been entered,
When adding new data, the user presses the item "data input" on the menu screen (S1).

The CPU 110 turns on the data lamp 41a of the operation panel unit 4 by pressing the item "data input", and displays a data input screen as shown in FIG. 5 on the display unit 43a. The data input screen includes, for example, “data No.” 430 and “registration date” 43 as shown in FIG.
1, “Test No.” 432 and the cement content (0,
2.5, 5, 7.5, 10%) "rising temperature" 433
Is displayed, and a ten key 434, a “graph” key 435, and an “end” key 436 are displayed.

The operator presses a portion of the input section 43b corresponding to the numeric keypad 434 to input a number,
"Data No." 430, "Registration date" 431, "Test N"
o. 432 and the temperature rise 433 are input (S2). CPU 110 converts the input data into data No. Each time it is stored in the memory 112.

When the data input is completed, the operator presses an "end" key 436.

The CPU 110 creates a regression function 435 'based on the input data, finds the deviation 437 and the like, and assigns them to the data No. Each time it is stored in the memory 112 (S3).

The CPU 110 redisplays a menu screen including items such as "data input", "data correction", and "test" on the display unit 43a.

When the operator needs to correct the data,
Press the item “Data Correction” to select the data No. to be corrected.
Is specified (S4).

The CPU 110 sets the data No. to be corrected.
Is read from the memory 112 and displayed on the display unit 43a.

The operator operates the ten-key 434 to input data for the "rising temperature" 433 to be corrected (S).
5).

The CPU 110 turns on the correction lamp 41c of the operation panel unit 4, corrects the regression function 435 'based on the corrected data, obtains the deviation 437, etc., and obtains the corrected regression function 435', etc. Is used to rewrite the memory 112 (S6). The operator inputs the input data, the regression function 4
When the user wants to check 35 'or the like, the user presses the "graph" key 435 to display a display as shown in FIG.
On the screen shown in FIG. 430 ', input data 433', deviation 437, regression function 435 ', etc. are displayed, and "print" key 438 and "return" key 439 are displayed. When the “print” key 438 is pressed, the printer 13
Thus, the regression function 435 'shown in FIG.
When the "return" key 439 is pressed, the screen returns to the data input screen shown in FIG. Thus, the deviation 43
Since 7 is displayed, it is easy to determine whether or not the data needs to be corrected, and since the regression function 435 'is displayed, it is easy to determine which data should be corrected.

Next, the CPU 110 executes “data input”,
A menu screen including items such as “data correction” and “test” is displayed again on the display unit 43a.

When the operator presses the item "test", C
The PU 110 displays a numeric keypad or the like on the display unit 43a.

The operator presses the numeric keypad and inputs the type of cement with a number from 1 to 10 (S7).

The first temperature sensor 9a obtains the detection result of the room temperature T ₁ , the second temperature sensor 9b obtains the detection result of the temperature T ₂ of the hydrochloric acid 5 in the hydrochloric acid container 6, and the third temperature sensor 9c obtains the detection result. ,
The detection result of the temperature T ₃ of the target soil 7 before mixing in the mixing vessel 8 is transmitted to the A / D converters 12 a, 12 b, and 12 c via the C / D converters 12.
It outputs to PU110.

The temperature T ₂ detected by the second temperature sensor 9b
When the temperature T ₃ detected by the third temperature sensor 9c reaches an equilibrium temperature substantially matching the room temperature T ₁ , the CPU 110
The test lamp 41d of the operation panel unit 4 is turned on, and the dispensing means 10 is controlled to execute the dispensing operation.

The dispensing means 10 dispenses a predetermined amount (for example, 100 ml) of hydrochloric acid 5 from the hydrochloric acid container 6 to the mixing container 8 (S8).

That is, the CPU 110 controls the valve driving unit 10
6, the first solenoid valve 102 is opened, the second solenoid valve 103 is closed, and the dispenser 104 is driven via the dispenser controller 105. The dispensing motor 104b causes the dispensing pump unit 104a to perform a pump operation several times (for example, twice). By the operation of the dispensing pump unit 104a, the hydrochloric acid 5 in the hydrochloric acid container 6 is sucked up from the hydrochloric acid container 6 and passes through the dispensing line 100, and the dispensing pump unit 104a, the intermediate point 100a of the dispensing line 100, It returns to the hydrochloric acid container 6 via the return line 101 and the first solenoid valve 102. This operation is performed twice. Thereby, since bubbles can be removed from the hydrochloric acid 5 in the hydrochloric acid container 6, the dispensed amount of the hydrochloric acid 5 into the mixing container 8 can be set to an accurate value.
Since the temperature T ₂ can be equalized, it is possible to measure the exact temperature rise [Delta] T.

When the two pump operations are completed, the CPU 1
10 controls the valve drive unit 106 to control the first solenoid valve 102
Is closed, the second solenoid valve 103 is opened, and the dispenser 104 is driven via the dispenser controller 105. The dispensing motor 104b causes the dispensing pump unit 104a to perform one pump operation. By the operation of the dispensing pump unit 104a, the hydrochloric acid 5 in the hydrochloric acid container 6 is sucked up from the hydrochloric acid container 6, passes through the dispensing line 100, and is dispensed with the dispensing pump unit 104a.
Intermediate point 100a of dispensing line 100 and second solenoid valve 10
After 3, a predetermined amount (for example, 100 ml) is dispensed into the mixing container 8.

The lifting / lowering motor 34 is driven by a lifting / lowering motor drive unit 36 under the control of the CPU 110 to support the support member 3.
Lower 3 The lower limit position sensor 37b is
When the lower limit of 3 is detected, the detection signal is sent to the CPU 110. The CPU 110 controls the lift motor drive unit 36 to stop the operation of the lift motor 34 based on the detection signal from the lower limit position sensor 37b.

The mixing motor 32 is driven by the mixing motor driving unit 35 based on the control of the CPU 110 to control the mixing shaft 3.
0, the mixing blade 31 provided at the tip of S is rotated (S
9). Thereby, the target soil 7 and the hydrochloric acid 5 in the mixing vessel 8 are mixed and stirred, and the heat of the reaction causes the temperature T ₃ of the target soil 7 to rise.
Rises.

The third temperature sensor 9c detects the temperature T ₃ of the target soil 7 after mixing in the mixing container 8, and outputs the detection result via the A / D converter 15, for example, as shown in FIG. and it outputs the CPU110 as the temperature curve of a temperature T _3.

The CPU110, after lights calibration lamp 41b of the operation panel 4, and the maximum value T _max of the temperature T ₃ after mixing based on the temperature curve from the third temperature sensor 9c, the maximum value The difference (rise temperature) ΔT between _Tmax and the equilibrium temperature T ₃ before mixing is obtained, and based on the obtained increase temperature ΔT, the regression function 435 ′ stored in the memory 112 is input by the display / input section 43. With reference to the regression function 435 'corresponding to the type of cement thus obtained, the content of the cement contained in the target soil 7 is obtained, and the result is stored in the memory 112 (S11).

On the other hand, when the mixing container 8 reaches the maximum temperature _Tmax , the CPU 110 controls the mixing motor driving unit 35 to stop the mixing by the mixing motor 32 and controls the lifting motor driving unit 36 to move the mixing motor 32 up and down. Until the upper limit position sensor 37a detects the upper limit position by the motor 34, the support member 33
To return to the initial position.

Next, under the control of the printer controller 14, the printer 13 reads out the cement content determined by the CPU 110 from the memory 112 and prints out the cement content (S12). In this way, the content of the cement contained in the target soil 7 is measured, and the result is printed out.
If the data input is unnecessary in the step S1, the operation after the step S7 may be executed after the data correction in the step S4, and the data input and the data in the steps S1 and S4 may be performed. When the correction is unnecessary, the operation after the step S7 may be executed without executing the data input and the data correction.

According to the present embodiment, since the accurate and accurate measurement of the amount of hydrochloric acid to be added and the accurate temperature measurement can be achieved simply, quickly, an apparatus for testing the content of cement using the method of dissolving hydrochloric acid is provided. can do. In addition, since the cement content can be measured by a simple input operation, the operation does not require skill and the burden on the operator can be reduced. Further, since the configuration is simple, the size can be reduced.

The present invention is not limited to the above embodiment,
Various modifications can be made without departing from the scope of the invention.
In this embodiment, the case where the cement content is measured as cement is described. However, it is possible to similarly measure the content of other cements such as coal.

[0056]

According to the first aspect of the present invention, the calculating means refers to the relation curve stored in the storage means in advance based on the temperature rise when hydrochloric acid is added to the target soil, To provide a cement content test device capable of easily and quickly measuring the content of cement contained in the target soil collected at the site because the content of cement contained in the target soil is determined. Can be. And the dispenser
When the hydrochloric acid in the hydrochloric acid container is dispensed by the dispensing pump,
Through the dosing pump, the middle point of the dosing line and the return line
After returning to the hydrochloric acid container, dispensing by the dispensing pump
In order to dispense a predetermined amount of hydrochloric acid into the mixing vessel through a pipeline,
Air bubbles can be removed from the hydrochloric acid in the hydrochloric acid container.
The exact amount of hydrochloric acid to be dispensed, and
The temperature of hydrochloric acid in the hydrochloric acid container can be made uniform
Thus, it is possible to accurately measure the temperature rise of the target soil.

Further, according to the second aspect of the present invention, even when the types of cements are different, the content of cements contained in the target soil can be measured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a cement content test apparatus of the present invention.

FIG. 2 is a schematic configuration diagram of the present embodiment.

FIG. 3 is a front view of an operation panel unit.

FIG. 4 is a block diagram showing a control system according to the embodiment.

FIG. 5 is a view showing a display example of an input / display unit for explaining the operation of the embodiment.

FIG. 6 is a view showing a display example of an input / display unit for explaining the operation of the embodiment.

FIG. 7 is a diagram showing a temperature curve of a target soil after mixing.

FIG. 8 is a flowchart illustrating the operation of the present embodiment.

FIG. 9 is a graph for explaining the heat of dissolution of hydrochloric acid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cement content test apparatus 5 Hydrochloric acid 8 Target soil 9c Third temperature sensor (detection means) 10 Dispensing means 43 Display / input unit (input means) 110 CPU (calculation means) 112 Memory (storage means) 435 'Return Function (related information)

Continued on the front page (73) Patent owner 000166627 Goyo Construction Co., Ltd. 2-2-2 Koraku, Bunkyo-ku, Tokyo (73) Patent owner 000222668 Toyo Construction Co., Ltd. 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka No. (73) Patent holder 594050278 NIKKEN Co., Ltd. 7-13-14 Nobode, Niiza City, Saitama Prefecture (72) Inventor Yoshikazu Yoshimi 3-1-1 Nagase, Yokosuka City, Kanagawa Prefecture Within the Port and Harbor Research Laboratory, Ministry of Transport (72) Inventor Hideaki Yoshizawa 4-9-9 Akasaka, Minato-ku, Tokyo Japan National Land Development Co., Ltd. (72) Inventor Hiroshi Kubo 4-640 Shimoseito, Kiyose-shi, Tokyo Obayashi Gumi Technical Research Institute Co., Ltd. (72) Inventor Takeshi Kawachi 4-640 Shimoseito, Kiyose-shi, Tokyo Inside Obayashi Corporation Technical Research Institute (72) Inventor Masanori Shima 5 Yonbancho, Chiyoda-ku, Tokyo Toa Construction Industry Co., Ltd. (72) Inventor Yohei Higuchi Higashi-Oi, Shinagawa-ku, Tokyo 1-11-25 Goyo Construction Co., Ltd. (72) Inventor Yoshio Furukawa 4-1-1 Komyobashi, Chuo-ku, Osaka, Osaka, Japan Toyo Construction Co., Ltd. (72) Inventor Tamotsu Sakano 2-8-11 Kita-Shinagawa, Shinagawa-ku, Tokyo Nikken Co., Ltd. (56) References Hiroshi Kubo, Premix Development of a rapid test method for the amount of cement in treated soil in the treatment method, The 47th Annual Scientific Meeting of the Japan Society of Civil Engineers, Japan Society of Civil Engineers, 1018-1019 (58) Fields surveyed (Int. Cl. ⁷ , (DB name) G01N 33/38 G01N 25/48

Claims (2)

(57) [Claims] 1. A cement content test apparatus for measuring the content of cement contained in the target soil by adding and mixing hydrochloric acid to the target soil collected at the site and detecting the temperature rise thereof. Dispensing means for adding and mixing hydrochloric acid to the target soil; storage means for storing in advance relation information between the content of the cement and the temperature increase in the target soil; and the hydrochloric acid being added and mixed. Detecting means for determining a maximum value of the temperature of the target soil after mixing and detecting a rising temperature from a difference between the maximum value and an equilibrium temperature before mixing; and storing the storage based on the rising temperature detected by the detecting means. Means for determining the content of cement contained in the target soil by referring to the relation information stored in the means, and wherein the dispensing means includes a hydrochloric acid container containing hydrochloric acid and a mixing containing the target soil. Minute to connect with container A pipe, a return pipe connecting the hydrochloric acid container and an intermediate point of the pipetting pipe, a pipetting pump interposed on the hydrochloric acid container side from the intermediate point of the pipetting pipe, and the pipetting pump The hydrochloric acid in the hydrochloric acid container passes through the dispensing line, and returns to the hydrochloric acid container via the dispensing pump, the midpoint of the dispensing line, and the return line, and is then dispensed by the dispensing pump. Control means for dispensing a predetermined amount of hydrochloric acid into the mixing vessel through the cement container. 2. A cement content test apparatus for measuring the content of cement contained in the target soil by adding hydrochloric acid to the target soil collected at the site and detecting the temperature rise thereof. Dispensing means for adding and mixing hydrochloric acid to the target soil; storage means for storing in advance relational information between the content of the cement relative to the target soil and the temperature increase for each type of the cement; Input means for inputting the kind of a kind; detection for obtaining the maximum value of the temperature after mixing of the target soil to which the hydrochloric acid is added and mixing, and detecting the rising temperature from the difference between the maximum value and the equilibrium temperature before mixing. Means, based on the temperature increase detected by the detection, referring to the relation information corresponding to the type of cement input by the input means among the relation information stored in the storage means, and included in the target soil. Seme Calculating means for determining the content of cement class, it was closed, the dispensing means, yield the hydrochloride vessel and the target soil to accommodate the hydrochloride
A dispensing line connecting the mixing container to be filled, and the hydrochloric acid container
A return line connecting the pipe and an intermediate point of the pipetting line;
Dispensing pump interposed on the hydrochloric acid container side from the middle point of the pipeline
And the hydrochloric acid in the hydrochloric acid container is dispensed with the dispensing pump by the dispensing pump.
Through the dosing pump, the middle point of the dosing line and the return line
After performing the operation of returning to the hydrochloric acid container, the dispensing pump
Dispense a predetermined amount of hydrochloric acid into the mixing container through a dispensing pipe
And a control means for controlling the cement content.