Unconfined compressive strength test curing immersion box

Abstract

The utility model relates to an inorganic binder unconfined compressive strength technology, and discloses an unconfined compressive strength test curing immersion box. When in use, the cylinder test piece is cured in the standard curing room for 6 days, the cylinder test piece is taken out on the seventh day and put into the water soaking drawer, water with the temperature of 20 DEG C + / -2 DEG C is injected into the water soaking drawer to the position 2.5 cm away from the upper surface of the cylinder test piece, then the water soaking drawer and the cylinder test piece are put into the water soaking grid of the box body together, and the cylinder test piece is taken out from the water after being soaked for one day; the temperature sensor monitors the temperature in the box body in real time and gives an alarm when the temperature changes, and the temperature controller enables the temperature in the box body to be always kept at 20 DEG C + / -2 DEG C; the soaking tank is additionally provided with a three-layer and thirteen-cell water tank device, a temperature controller does not need to be installed on each independent soaking layer or soaking cell, temperature management of the whole structure of the tank body is facilitated, meshes are formed in the soaking layers, constant-temperature airflow circulation is facilitated, and it is guaranteed that the temperature in the whole tank body is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of unconfined compressive strength of inorganic binders, and more specifically, particularly relates to a curing immersion tank for unconfined compressive strength test. Background Art

[0002] Inorganic binders are semi-rigid materials commonly used in base layers (sub-base layers) on roads. Commonly used types include: cement stabilized gravel (soil), ash stabilized soil, industrial waste slag stabilized fly ash soil, fly ash gravel, etc. With the development of transportation, not only the number of vehicles has increased rapidly, but also the number of heavy vehicles has increased. At the same time, the load of semi-rigid base structures has increased, so cracks are easily generated and reflected to the surface layer, directly affecting the service life of the road. For this reason, the Ministry of Transport of China has issued (JTGE51-2009) "Specifications for Stabilized Materials of Inorganic Binders for Highway Engineering", which has been further standardized and revised.

[0003] Unconfined compressive strength refers to the ultimate strength of a specimen against axial pressure without lateral pressure. In a triaxial test, axial pressure is applied to a cylindrical specimen without any lateral pressure until the specimen fails in shear.

[0004] After the unconfined compressive strength specimens have been cured in a standard curing room for 6 days, they need to be immersed in water for one day on the 7th day. In the past, the specimens were directly placed in a water tank. In this way, the bottom surface of the specimens could not be fully immersed in water, the immersion height of the specimens could not be guaranteed, and the temperature control was unstable, which affected the final unconfined compressive strength test results. In addition, this process is cumbersome and the equipment occupies a large area. Utility Model Content

[0005] The present application provides an immersion box for curing unconfined compressive strength test, which solves the problems in the prior art that the immersion height of the specimen cannot be guaranteed, the temperature control is unstable, which affects the final unconfined compressive strength test results, and the process is cumbersome to operate and the equipment occupies a large area.

[0006] The present application provides an unconfined compressive strength test curing immersion box, comprising a box body, wherein the box body comprises three immersion layers, each of the immersion layers is provided with a mesh, each of the immersion layers is provided with a plurality of immersion grids, a immersion grid door is provided on one side of each of the immersion grids, a immersion grid door handle is installed on the immersion grid door, a immersion drawer is provided in each of the immersion grids, and the rear side wall and top of each of the immersion drawers are not close to the rear side wall and top of the box body, a cylindrical specimen is placed in the immersion drawer, each of the immersion drawers is installed with a handle, and a temperature sensor and a temperature controller are installed on the side walls of the box body.

[0007] Preferably, the immersion drawer is made of transparent anti-fog PC (polycarbonate) material.

[0008] Preferably, a support rod is provided at the bottom of the immersion drawer, and the support rod is provided on four surfaces of the immersion drawer.

[0009] Preferably, each of the immersion drawers is engraved with scales.

[0010] Preferably, the temperature controller is provided with a waterproof cover.

[0011] Preferably, a heat-insulating layer is provided outside the box body.

[0012] It can be seen from the above technical scheme that the present application provides an unconfined compressive strength test curing immersion box. When in use, the cylindrical specimen is cured in a standard curing room for 6 days. On the 7th day, the cylindrical specimen is taken out and the mass of the specimen is weighed first, and then placed in an immersion drawer. Water at 20℃±2℃ is injected into the immersion drawer to 2.5cm above the upper surface of the cylindrical specimen. Then the immersion drawer together with the cylindrical specimen is placed in the immersion grid of the box. After immersion for one day, it is taken out of the water and the moisture on the surface of the cylindrical specimen is absorbed with a soft cloth. , weigh the mass of the cylindrical specimen and then carry out the compression test; the temperature sensor monitors the temperature in the box in real time, and issues an alarm when the temperature is too high or too low. The temperature controller keeps the temperature in the box at 20℃±2℃ at all times; for the unconfined compressive strength test curing immersion tank, a three-layer, thirteen-grid water tank device is added. There is no need to install a temperature controller on each individual immersion layer or immersion grid, which is convenient for temperature management of the entire structure of the box. The immersion layer is provided with mesh holes to facilitate the circulation of constant temperature airflow and ensure the temperature balance inside the entire box.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In order to improve the accuracy of curing immersion in unconfined compressive strength test, reduce the influence of human factors, and make the operation more convenient and accurate during the test and detection process, the utility model adds a three-layer, thirteen-grid water tank device to the curing of unconfined compressive strength test in accordance with the requirements of 3.1.4 of "Specifications for Inorganic Binder Stabilized Materials for Highway Engineering" (JTGE51-2009), so as to ensure that there is a convenient and standard device for curing immersion.

[0015] 2. In accordance with the requirements of 3.1.4 of the "Specifications for Inorganic Binder Stabilized Materials for Highway Engineering" (JTGE51-2009), the utility model adds a temperature controller and a temperature sensor to ensure that the water temperature is 20℃±2℃ and that the water surface is about 2.5cm above the top of the cylindrical specimen. The temperature controller is rechargeable and has a waterproof cover to avoid the inconvenience of temporary electricity use on the construction site.

[0016] 3. The utility model has scales engraved on each immersion drawer, which is convenient for observing the water level when filling the immersion drawer with water, ensuring that the injected water is 2.5 cm above the cylindrical test piece.

[0017] 4. The utility model provides support rods at the four sides of the bottom of the immersion drawer to fix the cylindrical specimen so that the cylindrical specimen will not swing left and right when immersed in water.

[0018] 5. The utility model divides the box into each immersion compartment, and a separate immersion drawer is placed in each immersion compartment, so that each cylindrical specimen can be taken out separately when the immersion time is up without affecting other immersion specimens.

[0019] In summary, an unconfined compressive strength test curing immersion tank is designed to improve the accuracy of unconfined compressive strength test curing immersion, reduce the influence of human factors, and make the operation more convenient and accurate during the test and detection process. According to the requirements of 3.1.4 in the "Specifications for Inorganic Binder Stabilized Materials for Highway Engineering" (JTGE51-2009), a three-layer, thirteen-grid water tank device is added for the unconfined compressive strength test curing. There is no need to install a temperature controller for each individual immersion layer or immersion grid, which is convenient for temperature management of the entire structure of the box. The immersion layer is provided with mesh holes to facilitate the flow of constant temperature airflow to ensure the temperature balance inside the entire box. A scale is engraved on each immersion drawer to facilitate observation of the water level when filling the immersion drawer with water to ensure that the injected water is 2.5 cm above the cylindrical specimen. Support rods are provided at the four sides of the bottom of the immersion drawer to fix the cylindrical specimen. When the cylindrical specimen is immersed in water, the cylindrical specimen will not sway left and right with the buoyancy of the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without inventiveness.

[0021] Figure 1 The left side structural diagram of an unconfined compressive strength test curing immersion tank provided by the utility model;

[0022] Figure 2 A front cross-sectional view of an unconfined compressive strength test curing immersion tank provided by the utility model;

[0023] Figure 3 A schematic diagram of the structure of an unconfined compressive strength test curing immersion tank immersion drawer provided by the utility model;

[0024] Figure 4A top plan view of the structure of an unconfined compressive strength test curing immersion tank provided by the utility model;

[0025] Figure 5 The utility model provides a schematic structural diagram of an immersion layer of an unconfined compressive strength test curing immersion tank.

[0026] The reference numerals in the specific implementation manner are as follows:

[0027] 1. Box body; 2. Water-immersed drawer; 3. Handle; 4. Temperature sensor; 5. Temperature controller; 6. Cylindrical specimen; 7. Scale; 8. Waterproof cover; 9. Water-immersed layer; 10. Water-immersed grid; 11. Insulation layer; 12. Mesh; 13. Support rod; 14. Water-immersed grid door; 15. Water-immersed grid door handle. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] See also Figure 1-5 , a curing immersion box for unconfined compressive strength test, in order to solve the problems in the prior art that the immersion height of the specimen cannot be guaranteed, the temperature control is unstable, which affects the final unconfined compressive strength test results, and the process is cumbersome to operate and the equipment occupies a large area, an unconfined compressive strength test curing immersion box is proposed. In order to improve the accuracy of curing immersion in the unconfined compressive strength test, reduce the influence of human factors, and make the operation more convenient and accurate during the test and detection process, according to the requirements of 3.1.4 of the "Specifications for Inorganic Binder Stabilized Materials for Highway Engineering" (JTGE51-2009), the unconfined compressive strength test curing immersion box is provided. For the limited compressive strength test, a three-layer, thirteen-grid water tank device is added. There is no need to install a temperature controller on each individual immersion layer or immersion grid, which is convenient for temperature management of the entire structure of the box. The immersion layer is provided with mesh holes to facilitate the circulation of constant temperature airflow to ensure the temperature balance inside the entire box. There are scales engraved on each immersion drawer to facilitate observation of the water level when filling the immersion drawer with water to ensure that the injected water is 2.5 cm above the cylindrical specimen. Support rods are provided on the four sides of the bottom of the immersion drawer to fix the cylindrical specimen so that it will not sway left and right when the cylindrical specimen is immersed in water.

[0030] Specifically, an unconfined compressive strength test health immersion box includes a box body 1, an insulation layer 11 is arranged outside the box body 1, the box body 1 includes three immersion layers 9, each immersion layer 9 is provided with a mesh 12, each immersion layer 9 is provided with a plurality of immersion grids 10, and a immersion grid door 14 is provided on one side of each immersion grid 10, and a immersion grid door handle 15 is installed on the immersion grid door 14. The box body 1 is increased to a three-layer, thirteen-grid water tank device. Only one temperature control structure needs to be installed in the box body 1, and there is no need to install a temperature control structure on each individual immersion layer 9 or immersion grid 10, which is convenient for temperature management of the entire structure of the box body 1. The immersion layer 9 is provided with a mesh 12 to facilitate the circulation of constant temperature airflow to ensure the temperature balance inside the entire box body 1, and each immersion grid 10 is provided with a immersion grid door. Drawer 2, a cylindrical specimen 6 is placed in the immersion drawer 2, and the cylindrical specimen 6 is cured in a standard curing room for 6 days. On the 7th day, the cylindrical specimen 6 is taken out and the mass of the specimen is weighed, and then put into the immersion drawer 2, and water at 20℃±2℃ is injected into the immersion drawer 2 to 2.5cm above the upper surface of the cylindrical specimen 6, and then the immersion drawer 2 together with the cylindrical specimen 6 is placed in the immersion grid 10 of the box 1, and taken out from the water after one day of immersion, and the moisture on the surface of the cylindrical specimen 6 is absorbed with a soft cloth, and the compression test is carried out after the mass of the cylindrical specimen 6 is weighed. The immersion drawer 2 is made of transparent anti-fog PC (polycarbonate) material, and a support rod 13 is provided at the bottom of the immersion drawer 2, and the support rod 13 is provided on the four sides of the immersion drawer 2, each immersion The water drawer 2 is engraved with scales 7, and the rear side wall and top of each immersion drawer 2 are not close to the rear side wall and top of the box body 1. Since the immersion drawer 2 is not close to the immersion grid 10 on the other three sides except the bottom, and the immersion layer 9 close to the bottom of the immersion drawer 2 is provided with a mesh 12, the constant temperature airflow in the entire box body 1 can flow in each layer, each grid and the immersion drawer 2, and the entire box body 1 is in a constant temperature state. A scale 7 is engraved on each immersion drawer 2, and the immersion drawer 2 is made of transparent anti-fog PC (polycarbonate) material, which is convenient for observing the water level when filling the immersion drawer 2 with water to ensure that the injected water is 2.5 cm above the cylindrical test piece 6. Support rods 13 are provided at the four sides of the bottom of the immersion drawer 2 to check the cylindrical test piece 6. Part 6 plays a fixing role. When the cylindrical specimen 6 is immersed in water, the cylindrical specimen 6 will not swing left and right with the buoyancy of water. A handle 3 is installed on each immersion drawer 2, dividing the box body 1 into each immersion grid 10, and an immersion drawer 2 is placed separately in each immersion grid 10. Each cylindrical specimen 6 can be taken out separately when the immersion time comes without affecting other immersion specimens. A temperature sensor 4 and a temperature controller 5 are installed on the side wall of the box body 1. The temperature sensor 4 monitors the temperature in the box body 1 in real time and issues an alarm when the temperature is high or low. The temperature controller 5 keeps the temperature in the box body 1 at 20℃±2℃ at all times. A waterproof cover 8 is provided outside the temperature controller 5. The temperature controller 5 adopts a rechargeable type with a waterproof cover 8 to avoid the inconvenience of temporary electricity use on the construction site.

[0031] It can be seen from the above technical scheme that an unconfined compressive strength test curing immersion box is used. When the cylindrical specimen 6 is cured in a standard curing room for 6 days, the cylindrical specimen 6 is taken out on the 7th day and the mass of the specimen is weighed first, and then put into the immersion drawer 2, and the immersion drawer 2 is filled with water at 20℃±2℃ to 2.5cm above the upper surface of the cylindrical specimen 6, and then the immersion drawer 2 and the cylindrical specimen 6 are placed in the immersion grid 10 of the box 1. After immersion for one day, the cylindrical specimen 6 is taken out of the water, and the water on the surface of the cylindrical specimen 6 is absorbed with a soft cloth, and the cylindrical specimen 6 is weighed. The column specimen 6 is subjected to a compression test after the quality is tested; the temperature sensor 4 monitors the temperature inside the box 1 in real time, and issues an alarm when the temperature is too high or too low, and the temperature controller 5 keeps the temperature inside the box 1 at 20°C ± 2°C; for the unconfined compressive strength test curing immersion tank, a three-layer, thirteen-grid water tank device is added, and there is no need to install a temperature controller 5 on each individual immersion layer 9 or immersion grid 10, which facilitates temperature management of the entire structure of the box 1. A mesh 12 is provided on the immersion layer 9 to facilitate the circulation of constant temperature airflow and ensure that the temperature inside the entire box 1 is balanced.

[0032] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the application disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art disclosed by the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0033] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. An unconfined compressive strength test curing immersion tank, characterized in that: The invention comprises a box (1), wherein the box (1) comprises three water-immersing layers (9), each of the water-immersing layers (9) is provided with a mesh (12), each of the water-immersing layers (9) is provided with a plurality of water-immersing grids (10), one side of each of the water-immersing grids (10) is provided with a water-immersing grid door (14), a water-immersing grid door handle (15) is installed on the water-immersing grid door (14), each of the water-immersing grids (10) is provided with a water-immersing drawer (2), and the rear side wall and the top of each of the water-immersing drawers (2) are not closely adjacent to the rear side wall and the top of the box (1), a cylindrical test piece (6) is placed in the water-immersing drawer (2), each of the water-immersing drawers (2) is provided with a handle (3), and a temperature sensor (4) and a temperature controller (5) are installed on the side wall of the box (1).

2. The unconfined compressive strength test curing immersion tank according to claim 1, characterized in that: The immersion drawer (2) is made of transparent anti-fog polycarbonate material.

3. The unconfined compressive strength test curing immersion tank according to claim 2, characterized in that: A support rod (13) is provided at the bottom of the water immersion drawer (2), and the support rod (13) is provided on four surfaces of the water immersion drawer (2).

4. The unconfined compressive strength test curing immersion tank according to claim 3, characterized in that: Each of the immersion drawers (2) is engraved with scales (7).

5. The unconfined compressive strength test curing immersion tank according to claim 1, characterized in that: The temperature controller (5) is provided with a waterproof cover (8) outside.

6. The unconfined compressive strength test curing immersion tank according to claim 1, characterized in that: A heat-insulating layer (11) is provided outside the box body (1).

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