Device for testing volume stability of steel slag fine aggregate

Abstract

The utility model relates to the technical field of testing instruments, and provides a steel slag fine aggregate volume stability testing device which comprises a pot body, a water storage cavity arranged in the pot body, a heating pipe arranged in the cavity and used for heating water; the steel slag containing box is arranged in the cavity, the outer wall of the steel slag containing box does not make contact with the inner wall of the cavity, and the edge of the upper end of the steel slag containing box is connected with the upper end of the pot body through a clamping piece; the cover plate is detachably arranged on the steel slag placing box through a fixing piece, and a sealed space can be formed between the cover plate and the steel slag placing box; an air pressure sensor is arranged on the side, close to the steel slag containing box, of the cover plate and used for detecting air pressure in the sealed space. The device can be used for detecting the soaking expansion rate of the steel slag fine aggregate with an irregular shape, the detection is more accurate, and the detection practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing instruments, in particular to a device for testing the volume stability of steel slag fine aggregate. Background Art

[0002] For road bases that use steel slag aggregate instead of natural crushed stone, the volume stability of steel slag is an important factor affecting the road performance of the base. It is very necessary to study and evaluate the water expansion rate of steel slag aggregate.

[0003] Since there are gaps between the fine aggregate particles of steel slag, the reaction between steel slag and water causes the gaps to become smaller. The changes in these gaps cannot be measured by the currently used steel slag water expansion instruments. In addition, the currently used steel slag water expansion instruments measure the displacement changes after the steel slag expands, and cannot accurately measure the overall expanded volume of the steel slag, resulting in inaccurate experimental results and an inability to accurately reflect the volume stability of the steel slag.

[0004] Therefore, in order to solve the above problems, a steel slag fine aggregate volume stability testing device is proposed. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model develops a device for testing the volume stability of steel slag fine aggregate. The utility model can detect the water expansion rate of irregularly shaped steel slag fine aggregate, thereby improving the practicability of the detection and making the detection more accurate.

[0006] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0007] A device for testing the volume stability of steel slag fine aggregate comprises: a pot body, wherein a cavity for storing water is provided in the pot body, a heating pipe is provided in the cavity, and the heating pipe is used to heat water; a steel slag placement box is provided in the cavity, and the outer wall of the steel slag placement box has no contact with the inner wall of the cavity, and the upper edge of the steel slag placement box is connected to the upper end of the pot body via a clamping piece; a cover plate, which is detachably provided on the steel slag placement box via a fixing piece, and a sealed space can be formed between the cover plate and the steel slag placement box; an air pressure sensor is provided on the side of the cover plate close to the steel slag placement box, for detecting the air pressure in the sealed space.

[0008] Preferably, the heating pipes include multiple ones, which are evenly arranged on the bottom and side walls of the cavity, and the heating pipes do not contact the outer wall of the slag placement box.

[0009] Preferably, it also includes a temperature sensor and a temperature control instrument. The temperature sensor is arranged on the inside of the cavity, the temperature control instrument is arranged on the outside of the pot body, and a power cord is arranged inside the pot body. The power cord is used to connect the heating tube, the temperature sensor and the temperature control instrument, so that the measurement value of the temperature sensor can be transmitted to the temperature control instrument, and the temperature control instrument can control the heating of the heating tube.

[0010] Preferably, a main switch is further included, which is arranged on the outside of the pot body, one end of the main switch is connected to the temperature control instrument, and the other end is connected to the power supply.

[0011] Preferably, a slot is provided on the side wall of the slag placement box, and the slot and the edge of the cover plate are connected and fixed by a fixing piece.

[0012] Preferably, a sealing rubber strip is provided on the side of the cover plate, and the sealing rubber strip is used to contact the inner wall of the slag placement box.

[0013] Preferably, a data collector and a handle are provided on the side of the cover away from the air pressure sensor, and the data collector is connected to the air pressure sensor; a pressure relief valve is also provided on the cover to release the high air pressure in the sealed space.

[0014] Preferably, scale lines are provided on the inner wall of the slag placement box, and the highest position of the scale lines is no higher than the position of the card slot, which is the maximum amount of water added for testing.

[0015] Preferably, a drain pipe is provided on the pot body, the drain pipe is connected to the cavity, and a drain valve is provided at one end of the drain pipe away from the cavity; a pot handle is provided on the outer side of the pot body, and a support is provided at the bottom of the pot body.

[0016] The effects provided in the content of the utility model are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solution has the following advantages:

[0017] The utility model provides a cavity and sets the cavity as a sealed space through a cover plate, so that the device can detect the gas pressure in the cavity through a pressure sensor, and convert the change in gas volume into the change in slag volume, thereby improving the accuracy of the device detection; by providing a temperature sensor and a heating tube, the temperature of the water bath can be controlled, thereby better completing the test and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of the device according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of device detection according to an embodiment of the present utility model.

[0021] In the figure, 1. pot body; 2. heating tube; 3. temperature control instrument; 4. drain pipe; 5. connector; 6. temperature sensor; 7. main switch; 8. slag storage box; 9. cover; 10. air pressure sensor; 11. data collector; 12. handle; 13. pot handle; 14. support; 15. fixing part; 16. pressure relief valve; 17. slag fine aggregate; 18. water. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-Figure 2 As shown, the utility model provides a technical solution:

[0024] A device for testing the volume stability of steel slag fine aggregate comprises: a pot body 1, a cavity for storing water is provided in the pot body 1, a heating pipe 2 is provided in the cavity, and the heating pipe 2 is used to heat the water in the pot body 1; a steel slag placing box 8, which can be provided in the cavity, and there is no contact between the outer wall of the steel slag placing box 8 and the inner wall of the cavity, the upper edge of the steel slag placing box 8 is connected to the upper end of the pot body 1 by a clamping member 5, and the clamping member 5 can adopt a common buckle on the market to press the steel slag placing box 8 onto the pot body 1 to prevent the steel slag placing box 8 from moving during the heating process. Preferably, the interior of the steel slag placing box 8 is provided as a rectangular water storage space to facilitate the calculation of the internal volume; a cover plate 9, which is detachably provided on the steel slag placing box 8 by a fixing member 15, and a sealed space can be formed between the cover plate 9 and the steel slag placing box 8; an air pressure sensor 10 is provided on the side of the cover plate 9 close to the steel slag placing box 8, for detecting the air pressure in the sealed space.

[0025] In this embodiment, the heating tubes 2 include three tubes, which are evenly arranged on the bottom and both side walls of the cavity, and the heating tubes 2 do not contact the outer wall of the slag placement box 8, so as to avoid the influence of uneven heating temperature on the test results.

[0026] In this embodiment, a temperature sensor 6 and a temperature control instrument 3 are also included, both of which can be selected from commonly available ones on the market. The temperature sensor 6 is arranged on the inside of the cavity to detect the heating water temperature. The temperature control instrument 3 is arranged on the outside of the pot body 1 to receive data and control the heating temperature. A power cord is arranged inside the pot body 1, and the power cord is used to connect the heating tube 2, the temperature sensor 6 and the temperature control instrument 3, so that the measurement value of the temperature sensor 6 can be transmitted to the temperature control instrument 3, and the temperature control instrument 3 can control the heating of the heating tube 2, thereby improving the practicality of the device.

[0027] In this embodiment, a main switch 7 is further included, which is arranged on the outside of the pot body 1. One end of the main switch 7 is connected to the temperature control instrument 3, and the other end is connected to the power supply, which is used to control the opening and closing of the device, thereby improving safety.

[0028] In this embodiment, a slot is provided on the side wall of the slag placement box 8 for connecting the cover plate 9. The slot and the edge of the cover plate 9 are connected and fixed by a fixing member 15. The fixing member 15 can be fixed by a connecting nail or the like to avoid movement of the cover plate 9 during the test, thereby improving the stability of the test.

[0029] In this embodiment, a sealing rubber strip is provided on the side of the cover plate 9, and the sealing rubber strip is used to contact the inner wall of the slag placement box 8 to achieve a sealing effect, avoid air leakage, and improve the accuracy of the test.

[0030] In this embodiment, a data collector 11 and a handle 12 are provided on the side of the cover plate 9 away from the air pressure sensor 10. The data collector 11 is connected to the air pressure sensor 10 and is used to display the detection value of the air pressure sensor 10. The handle 12 is convenient for taking the cover plate 9. A pressure relief valve 16 is also provided on the cover plate 9 to unload the high air pressure in the sealed space and balance the air pressure inside and outside the sealed space so that the device can be opened quickly and safely after the test is completed, thereby improving the safety and efficiency of the use of the device.

[0031] In this embodiment, scale lines are evenly arranged vertically on the inner wall of the slag placement box 8. The highest position of the scale line is no higher than the position of the card slot. It is the maximum amount of water added for testing. The highest scale line is marked as Max to avoid safety accidents.

[0032] In this embodiment, a drain pipe 4 is provided on the pot body 1, and the drain pipe 4 is connected to the cavity. A drain valve is provided at the end of the drain pipe 4 away from the cavity. After the test is completed, the water in the pot body 1 is discharged by opening the drain valve; a pot handle 13 is provided on the outer edge of the pot body 1 to facilitate the movement of the pot body 1, and a support 14 is provided at the bottom of the pot body 1 to improve the stability of the device.

[0033] Working principle: First, place the steel slag fine aggregate 17 to be tested into the steel slag placement box 8, slowly add room temperature water to a height of more than 25mm above the top surface of the test piece, and the amount of water added must not exceed the maximum scale Max, and calculate the volume of air in the cavity according to the water level recorded on the scale , fix the cover plate 9 with the fixing piece 15 through the slot; read the initial value of the air pressure sensor 10 Add an appropriate amount of water 18 to the pot body 1 and fix the slag storage box 8 in the pot body 1 through the clamp 5; start timing, set the temperature of the water in the pot body 1 to 80±3℃, heat it to the corresponding temperature, keep it at this temperature for 6 hours, then stop keeping the temperature and let it cool naturally. When it reaches 24±0.5 hours, read the air pressure reading for the first 24 hours. , repeat 10 times and read the air pressure reading , through the gas volume pressure formula , the volume of the cavity after the steel slag expands is obtained, and the volume of the gas reduced is the volume increased when the steel slag expands when it meets water, so as to further obtain the volume stability of the steel slag fine aggregate.

[0034] Anything not described in detail in the present invention is a conventional technical means known to those skilled in the art.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more such features. In the description of this utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for testing the volume stability of steel slag fine aggregate, characterized in that: include: A pot body (1), wherein a cavity for storing water is provided in the pot body (1), a heating pipe (2) is provided in the cavity, and the heating pipe (2) is used to heat water; The slag placing box (8) is arranged in the cavity, and the outer wall of the slag placing box (8) does not contact the inner wall of the cavity. The upper edge of the slag placing box (8) is connected to the upper end of the pot body (1) through a clamping member (5); The cover plate (9) is detachably mounted on the slag storage box (8) via a fixing member (15), and a sealed space can be formed between the cover plate (9) and the slag storage box (8); An air pressure sensor (10) is provided on one side of the cover plate (9) close to the slag placement box (8) for detecting the air pressure in the sealed space.

2. The steel slag fine aggregate volume stability testing device according to claim 1, characterized in that: The heating pipes (2) include a plurality of heating pipes which are evenly arranged on the bottom and side walls of the cavity, and the heating pipes (2) do not contact the outer wall of the slag placement box (8).

3. The steel slag fine aggregate volume stability testing device according to claim 2, characterized in that: The invention also includes a temperature sensor (6) and a temperature control instrument (3), wherein the temperature sensor (6) is arranged inside the cavity, the temperature control instrument (3) is arranged outside the pot body (1), and a power line is arranged inside the pot body (1), and the power line is used to connect the heating tube (2), the temperature sensor (6) and the temperature control instrument (3), so that the measured value of the temperature sensor (6) can be transmitted to the temperature control instrument (3), and the temperature control instrument (3) can control the heating of the heating tube (2).

4. The device for testing the volume stability of steel slag fine aggregate according to claim 3, characterized in that: The invention also includes a main switch (7) which is arranged outside the pot body (1). One end of the main switch (7) is connected to the temperature control instrument (3), and the other end is connected to the power supply.

5. The steel slag fine aggregate volume stability testing device according to claim 4, characterized in that: A slot is provided on the side wall of the slag placement box (8), and the slot and the edge of the cover plate (9) are connected and fixed via a fixing piece (15).

6. The device for testing the volume stability of steel slag fine aggregate according to claim 5, characterized in that: A sealing rubber strip is provided on the side of the cover plate (9), and the sealing rubber strip is used for contacting the inner wall of the slag placing box (8).

7. The device for testing the volume stability of steel slag fine aggregate according to claim 6, characterized in that: A data collector (11) and a handle (12) are provided on the side of the cover plate (9) away from the air pressure sensor (10), and the data collector (11) is connected to the air pressure sensor (10); a pressure relief valve (16) is also provided on the cover plate (9) for releasing the high air pressure in the sealed space.

8. The device for testing the volume stability of steel slag fine aggregate according to claim 7, characterized in that: Scale lines are set on the inner wall of the slag placement box (8), and the highest position of the scale lines is not higher than the position of the card slot, which is the maximum amount of water added for testing.

9. The steel slag fine aggregate volume stability testing device according to claim 8, characterized in that: A drainage pipe (4) is provided on the pot body (1), the drainage pipe (4) is connected to the cavity, and a drainage valve is provided at one end of the drainage pipe (4) away from the cavity; A pot handle (13) is provided on the outer side of the pot body (1), and a support (14) is provided at the bottom of the pot body (1).

Images