In-situ measuring device and testing method for ice adhesive force of concrete and coating thereof

Abstract

The invention discloses a concrete and coating ice adhesive force in-situ measuring device and a testing method, the device comprises a low-temperature environment box, a base is arranged in the low-temperature environment box, a clamp assembly is arranged on the base and used for clamping a to-be-tested concrete test piece, and a peelable ice cube mold is arranged on one side of the to-be-tested concrete test piece and used for forming coating ice; a detachable shearing assembly is further arranged in the low-temperature environment box, the output end of the shearing assembly acts on the coating ice, and the input end of the shearing assembly extends out of the low-temperature environment box and is connected with the measuring system. And the measuring system is used for transmitting power, converting shear force generated by separating the ice from the concrete test piece to be measured into digital signals, and feeding back the relationship between the shear force and time. The measuring device is simple in structure, easy to use and operate and capable of being operated in an indoor normal-temperature environment, people do not need to enter the environment below 0 DEG C, the refrigeration effect of the test piece and the coating ice is good, and the refrigeration time can be shortened.

Description

Technical Field

[0001] The invention relates to the technical field of concrete testing, and in particular to an in-situ measuring device and a testing method for ice adhesion of concrete and its coating. Background Art

[0002] Most water conservancy projects in severe cold regions often have ice damage to concrete near the contact surface with water, such as upstream slope protection, gate piers, retaining walls, water intake towers, water-saving gates and water diversion tunnels. Frost damage to hydraulic concrete is the main factor leading to concrete deterioration. At present, there is still no quantitative standard for ice adhesion at home and abroad. Some scholars have measured the ice adhesion strength by centrifugation, and some researchers have prepared equipment for measuring ice adhesion by bending and breaking methods. However, methods such as centrifugation and bending and breaking methods are limited by equipment factors, have great limitations on sample size, and are difficult to perform in-situ measurements under precise temperature control conditions, resulting in greatly reduced measurement accuracy.

[0003] In summary, the prior art has defects such as low precision, limited size range of test samples, and complex test system. Therefore, the present invention is committed to developing an in-situ ice adhesion strength testing device and method with high precision and easy operation. Summary of the invention

[0004] The purpose of the present invention is to provide an in-situ measuring device and a testing method for ice adhesion of concrete and its coating in view of the problems existing in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, an in-situ measurement device for ice adhesion of concrete and its coating is provided, including a low-temperature icing system and a measurement system connected thereto, wherein the low-temperature icing system includes a low-temperature environment box, wherein a base is provided in the low-temperature environment box, wherein a clamp assembly is provided on the base, wherein the clamp assembly is used to clamp a concrete specimen to be tested, wherein a removable ice cube mold is provided on one side of the concrete specimen to be tested, wherein the ice cube mold is used to form ice coating on the concrete specimen to be tested; wherein a detachable shear assembly is also provided in the low-temperature environment box, wherein an output end of the shear assembly acts on the ice coating, and an input end of the shear assembly extends out of the low-temperature environment box and is connected to the measurement system, wherein the measurement system is used to transmit power and convert the shear force generated by separating the ice coating from the concrete specimen to be tested into a digital signal, and to feed back the relationship between the shear force and time.

[0006] The in-situ measuring device for ice adhesion of concrete and its coating has a simple structure, is easy to use and operate, can be operated in a normal indoor temperature environment, does not require personnel to enter an environment below 0°C, and can ensure that the concrete specimen to be tested is always in a low temperature state during the entire test process. The cooling effect of the specimen and the ice coating is good and the cooling time can be shortened.

[0007] The low-temperature icing system is used to freeze the ice coating and the concrete specimen to be tested together to form a module to be tested and to perform in-situ testing on it. The low-temperature environmental box is configured to accommodate the fixture assembly and be connected to the measurement system, so that the concrete specimen to be tested can be fixed therein, and the ice coating is directly formed on the surface of the concrete specimen to be tested in a low-temperature environment, and the adhesion of the ice coating is tested after it is completely formed. During the entire test process, the specimen and the ice coating can be kept at an extremely low temperature, thereby avoiding the adverse effects of changes in temperature factors on the test, which is conducive to improving the overall measurement accuracy.

[0008] Furthermore, the low-temperature environment box is provided with a sealed box door that can be opened and closed, and the sealed box door is provided with an observable transparent window; the low-temperature environment box provides a low temperature of not less than minus 20 degrees Celsius.

[0009] Furthermore, the base is arranged horizontally, and at least one horizontal slide groove is provided on the base, and the slide groove is used to connect the slider, and the slider is connected to the clamp assembly, and a plurality of locking holes are also provided on the base, and the locking holes are connected to the locking member to fix the slider. The position of the clamp assembly can be adjusted, that is, the position of the clamped concrete specimen to be tested can be adjusted so that it is in the correct position to be tested.

[0010] Furthermore, the clamp assembly includes a clamping frame, a slider is provided below the clamping frame and connected to the base, a clamping plate is provided on at least one side wall of the clamping frame, the clamping plate is used to fix the concrete specimen to be tested, the clamping plate is connected to an adjusting screw, the adjusting screw passes through the clamping frame and is connected to a locking handle, so as to clamp concrete specimens of different sizes to be tested.

[0011] Furthermore, the ice cube mold is a rectangular parallelepiped or a cube with a cavity, and an opening is provided on one side of the ice cube mold. The side where the opening is located is arranged toward the concrete specimen to be tested and tightly abuts against the outer surface of the concrete specimen to be tested. A water injection hole is provided on the upper side of the other side of the ice cube mold, and water can be injected into the ice cube mold. The water injection hole can be equipped with a sealing plug or a breathable plug.

[0012] Furthermore, the ice cube mold is made of silicone or elastic plastic material, and sealing glue is coated around the opening so as to connect the ice cube mold to the concrete specimen to be tested.

[0013] Furthermore, the concrete specimen to be tested is a cement mortar specimen, or a cement mortar specimen with a coating on the surface, and the adhesion between the coating and ice can be tested.

[0014] Furthermore, the shearing assembly includes an upper pressure head, and the upper pressure head is connected to a transmission shaft; a clearance hole is provided on the low-temperature environment box, and the transmission shaft extends from the clearance hole and is connected to the measurement system.

[0015] Furthermore, the measurement system includes a mechanical testing machine and a host computer connected to the mechanical testing machine.

[0016] In a second aspect, a method for testing the in-situ measurement device for ice adhesion of concrete and its coating is provided, the method comprising the following steps: Prepare the concrete specimen to be tested and keep it ready for use after curing; Using sealing glue to tightly connect the ice cube mold to one side of the concrete specimen to be tested; Placing the concrete specimen to be tested connected to the ice cube mold on the fixture assembly, and fixing the concrete specimen to be tested after adjusting the position; Pour water into the ice cube mold and close the low temperature environment box; Starting the low temperature environment box, freezing for several hours in a sub-zero low temperature environment until the water in the ice cube mold is completely frozen, and then quickly removing the sealing putty and the ice cube mold to obtain ice adhered to the concrete specimen to be tested; The measuring system is started to test the ice shear strength of the concrete specimen to be tested and the ice cover in situ; and an ice shear force-displacement relationship curve and a maximum ice shear force are obtained.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The in-situ measuring device for ice adhesion of concrete and its coating has a simple structure, is easy to use and operate, can be operated in an indoor room temperature environment, does not require personnel to enter an environment below 0°C, and can ensure that the concrete specimen to be tested is always in a low temperature state during the entire test process. The cooling effect of the specimen and the ice coating is good and the cooling time can be shortened; 2. The measuring device can test the ice adhesion in situ and under precise temperature control conditions, with strong repeatability. By modifying the low-temperature system and the measuring system, more testing requirements for coating performance can be met. The specimen has small limitations and high measurement accuracy. The device can be applied to the functional modification of other testing machines, and has strong reference and guiding significance; 3. The low-temperature icing system is used to freeze the ice coating and the concrete specimen to be tested together to form a module to be tested and to perform in-situ testing on it. The setting of the low-temperature environmental box can directly The ice coating is formed on the surface of the concrete specimen to be tested, and the adhesion of the ice coating is tested after the ice coating is fully formed. During the entire test process, the specimen and the ice coating can be kept at an extremely low temperature, avoiding the adverse effects of changes in temperature factors on the test, and there is no need for human intervention in the ice coating and the specimen, which is beneficial to improving the overall measurement accuracy; 4. The clamp assembly can clamp concrete specimens of various models, and the ice cube mold can produce ice coatings of different models and shapes. The two cooperate with each other to test the adhesion of ice coatings in various forms, greatly improving the scope and breadth of the test; 5. The shear assembly is also arranged in the low-temperature environment box, which can directly exert force on the ice coating, push the ice coating to separate it from the concrete specimen to be tested, and complete the shear test in the low-temperature environment box. At the same time, an external measurement system is used to control and collect data, and the shear force, test time and other data can be easily output. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the in-situ measurement device for ice adhesion of concrete and its coating of the present invention; Figure 2 It is a schematic diagram of a clamp assembly and a shear assembly in the in-situ measurement device of the present invention; In the figure: 1. Low-temperature freezing system; 2. Measuring system; 3. Low-temperature environmental chamber; 4. Base; 5. Slide; 6. Clamping frame; 7. Clamping plate; 8. Locking handle; 9. Concrete specimen to be tested; 10. Ice cube mold; 11. Ice coating; 12. Upper pressure head; 13. Locking nut; 14. Transmission shaft; 15. Sealed chamber door. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Example 1

[0021] like Figure 1 and Figure 2 As shown, an in-situ measuring device for ice adhesion of concrete and its coating comprises a low-temperature icing system 1 and a measuring system 2 connected thereto, wherein the low-temperature icing system 1 comprises a low-temperature environment box 3, wherein a base 4 is provided in the low-temperature environment box 3, wherein a clamp assembly is provided on the base 4, wherein the clamp assembly is used to clamp a concrete specimen 9 to be tested, wherein a peelable ice cube mold 10 is provided on one side of the concrete specimen 9 to be tested, wherein the ice cube mold 10 is used to form an ice coating 11 on the concrete specimen to be tested; wherein a detachable shear assembly is further provided in the low-temperature environment box 3, wherein an output end of the shear assembly acts on the ice coating 11, and an input end of the shear assembly extends out of the low-temperature environment box and is connected to the measuring system 2, wherein the measuring system 2 is used to transmit power and convert the shear force generated by separating the ice coating 11 from the concrete specimen 9 to be tested into a digital signal, and to feed back the relationship between the shear force and time.

[0022] The in-situ measuring device for ice adhesion of concrete and its coating has a simple structure, is easy to use and operate, can be operated in a normal indoor temperature environment, does not require personnel to enter an environment below 0°C, and can ensure that the concrete specimen to be tested is always in a low temperature state during the entire test process. The cooling effect of the specimen and the ice coating is good and the cooling time can be shortened.

[0023] The in-situ measurement device for ice adhesion of concrete and its coating can test ice adhesion in situ and under precise temperature control conditions with strong repeatability. By modifying the low-temperature system and the measurement system, more test requirements for coating performance can be met. The specimen has fewer limitations and higher measurement accuracy. The device can be applied to the functional modification of other testing machines and has strong reference and guiding significance.

[0024] The low-temperature icing system 1 is used to freeze the ice coating 11 and the concrete specimen to be tested 9 together to form a module to be tested and to perform in-situ testing on it. The low-temperature environmental box 3 is configured to accommodate the fixture assembly and be connected to the measurement system, and the concrete specimen to be tested can be fixed therein. The ice coating is directly formed on the surface of the concrete specimen to be tested in a low-temperature environment, and the adhesion of the ice coating is tested after it is fully formed. During the entire test process, the specimen and the ice coating can be kept at an extremely low temperature, avoiding the adverse effects of changes in temperature factors on the test, and there is no need for human intervention in the ice coating and the specimen, which is conducive to improving the overall measurement accuracy.

[0025] The fixture assembly can clamp concrete specimens of various models, and the ice cube mold can produce ice coverings of different models and shapes. The two can cooperate with each other to test the adhesion of ice coverings in various forms, greatly improving the scope and extensiveness of the test.

[0026] The shear component is also arranged in the low-temperature environment box, and can directly generate a force on the ice cover to push the ice cover to separate it from the concrete specimen to be tested, and complete the shear test in the low-temperature environment box. At the same time, it is controlled and data collected by an external measurement system, and the shear force, test time and other data can be easily output.

[0027] Furthermore, the low-temperature environment box 3 is provided with an openable and closable sealed box door 15, and the sealed box door 15 is provided with an observable transparent window; the low-temperature environment box 3 provides a low temperature of not less than minus 20 degrees Celsius, preferably -30°C.

[0028] By opening and closing the sealed box door 15, the concrete specimen to be tested can be placed on the fixture assembly and fixed, and the ice cube mold 10 can also be set on the concrete specimen to be tested 9, and the ice cube mold 10 can also be removed without damage after solidification; the transparent window can be used to observe the internal situation from the outside, and the movement of the shear assembly and the ice coating can be observed.

[0029] Furthermore, the base 4 is arranged horizontally, and at least one horizontal slide groove 5 is provided on the base 4, and the slide groove 5 is used to connect the slider, and the slider is connected to the clamp assembly. The base 4 is also provided with a plurality of locking holes, and the locking holes are connected to the locking pieces to fix the slider.

[0030] The base 4 is used to support the clamp assembly, and the position of the clamp assembly can be adjusted through the cooperation of the slide groove 5 and the slider, that is, the position of the clamped concrete specimen to be tested can be adjusted so that it is in the correct position to be tested. Such a setting has good flexibility and is also conducive to the position adjustment of concrete specimens of different sizes to be tested. The slider can be locked through the locking hole and the locking member, that is, the clamp assembly can be fixed at a certain position; the locking member can be a locking screw, a bolt, a connecting pin, etc.

[0031] The slide groove 5 is a T-shaped slide groove or a dovetail slide groove, and the slider is provided with a sliding connection structure adapted thereto. The base 4 can be a unidirectional base in the X direction, or a composite base that can be adjusted in both the X and Y directions. The clamp assembly is vertically arranged on the base 4, and a connecting column is provided below the base 4, which can be connected to a corresponding connecting hole in the low temperature environment box 3.

[0032] Furthermore, the clamp assembly includes a clamping frame 6, a slider is provided at the bottom of the clamping frame 6 and is connected to the base 4, a clamping plate 7 is provided on at least one side wall of the clamping frame 6, and the clamping plate 7 is used to fix the concrete specimen 9 to be tested. The clamping plate 7 is connected to an adjusting screw, and the adjusting screw passes through the clamping frame 6 and is connected to a locking handle 8.

[0033] Clamps 7 can be arranged vertically and / or laterally to clamp concrete specimens of different sizes. In this embodiment, the clamps 7 are located at the top to clamp the concrete specimen 9 from top to bottom. The arrangement of the adjusting screw and the locking handle 8 can adjust the height of the clamps and lock them.

[0034] Furthermore, the ice cube mold 10 is a rectangular parallelepiped or a cube with a cavity, and the size of the cavity is larger than the actual water injection volume and the required ice covering size; an opening is provided on one side of the ice cube mold 10, and the side where the opening is located is arranged toward the concrete specimen 9 to be tested and tightly abuts against the outer surface of the concrete specimen 9 to be tested, and a water injection hole is provided on the other side of the ice cube mold 10.

[0035] One side of the opening abuts against the outer surface of the concrete specimen to be tested, and the other side can be filled with water. When the water condenses into ice, it can adhere to the concrete specimen to be tested, and the concrete specimen can be tested after the ice cube mold is removed.

[0036] Furthermore, the ice cube mold 10 is made of silicone or elastic plastic material, which is light and easy to demould later; the opening is coated with sealing putty around the edges, and the sealing putty can be used to connect the ice cube mold and the concrete specimen to be tested, and form a sealing structure around them to prevent the injected water from seeping out.

[0037] Furthermore, the concrete specimen 9 to be tested is a cement mortar specimen, which can be combined with ice coating to perform adhesion test.

[0038] In some embodiments, the concrete specimen 9 to be tested may also be a cement mortar specimen coated with a coating on the surface, and the coating is hydrophobic, which can prevent water vapor from condensing and penetrating into the concrete. Such a setting can, on the one hand, prevent the concrete from freezing and forming a greater adhesion with ice, and on the other hand, can also test the adhesion between the coating and the ice. This method for testing surfaces such as hydrophobic coatings with anti-icing properties has high test accuracy and controllability.

[0039] Furthermore, the shearing assembly includes an upper pressure head 12 , to which a transmission shaft 14 is connected; a clearance hole is provided on the low-temperature environment box 3 , and the transmission shaft 14 extends from the clearance hole and is connected to the measurement system 2 .

[0040] The upper pressure head 12 is L-shaped, and the lower part can abut against the ice cover 11 and apply pressure, and the upper part can be connected to the transmission shaft 14 through the locking nut 13, etc., and the transmission shaft 14 can pass through the clearance hole on the low temperature environment box 3 and connect with the driver (motor, cylinder or hydraulic cylinder) of the external measurement system 2 to apply pressure and displacement. This setting can ensure that the shear assembly is in the low temperature environment box, and there is no need to open the box and expose the test piece during the test. Some insulation structures and sliding seals can be set at the clearance hole to reduce temperature loss.

[0041] Furthermore, the measurement system includes a mechanical testing machine and a host computer connected to the mechanical testing machine.

[0042] When the measuring device is used, the prepared cement mortar specimen and coating specimen are cured and then placed in the fixture assembly for fixing. Use sealing putty to seal the silicone ice cube mold and the specimen tightly, and the sealing part should be clean and dry. Paste the ice mold and the coating specimen together, fill the silicone ice cube mold with water to the specified height, and reserve enough space for the volume expansion caused by the freezing process. Since the ice mold is made of silicone, it has greater elasticity and is easy and fast to demold. Freeze at the temperature set in the low-temperature environmental box. After it is completely frozen, use a modified mechanical testing machine to test the ice shear strength of the concrete and coating surface in situ. The entire test process is carried out in a low-temperature environmental box. When testing the ice adhesion strength, use the upper pressure head to push and pull the ice layer downward, and test the ice shear force and displacement relationship curve at the set test speed. The maximum ice shear force is the ice adhesion. Example 2

[0043] This embodiment provides a testing method using the in-situ measuring device for ice adhesion of concrete and its coating in Embodiment 1, the testing method comprising the following steps: The concrete specimen to be tested is prepared and set aside after curing; specifically, a cement mortar specimen with a specification of 70 mm×70 mm×20 mm is prepared and cured for 15 days under a standard environment.

[0044] Use sealing glue to tightly connect the ice cube mold to one side of the concrete specimen to be tested; specifically, use sealing glue to tightly seal the 45mm×45mm×45mm silicone ice cube mold and the cement mortar specimen to prevent water seepage. The sealed area should be clean and dry for subsequent demoulding. Paste the ice cube mold to the specimen and cut an area of ​​about 4cm above the ice cube mold. 2 The water inlet is about 4cm high, which leaves enough space for volume expansion during the freezing process. The ice cube tray mold is made of silicone, so it has great elasticity and is easy and quick to demould.

[0045] The concrete specimen to be tested connected to the ice cube mold is placed on the clamp assembly, and the position is adjusted to fix the concrete specimen to be tested; specifically, the concrete specimen to be tested is clamped in the clamping frame using the clamping plate, and the position of the clamping frame on the base is adjusted so that the ice cube mold on the side of the concrete specimen to be tested is located below the upper pressure head.

[0046] Pour water into the ice cube mold and close the sealed door of the low temperature environment box; The low temperature environment box is started and frozen at -30°C for 2 hours until the water in the ice cube mold is completely frozen, and then the sealing glue and the ice cube mold are quickly removed by opening the sealed box door to obtain ice adhering to the concrete specimen to be tested, and the sealed box door is closed again. This process only takes tens of seconds and is fast, and basically does not bring adverse effects on ice. The measuring system is started, and the driver drives the upper pressure head to push and pull the ice layer downward, with a test speed of about 3-5 mm / min, to test the ice shear force; obtain the ice shear force and displacement relationship curve, as well as the maximum ice shear force. The shear force generated by separating the ice and the test piece is converted into a digital signal through a mechanical testing machine, and the relationship between force and time is fed back. Example 3

[0047] The operation of this embodiment is basically the same as that of embodiment 2, except that a coating is provided on the surface of the concrete specimen to be tested, that is, a 2 mm single-component polyurea material is applied. Example 4

[0048] The operation of this embodiment is basically the same as that of embodiment 2, except that a coating is provided on the surface of the concrete specimen to be tested, and the 2 mm single-component polyurea coating is replaced with a PTFE coating. Example 5

[0049] The operation of this embodiment is basically the same as that of embodiment 2, except that the freeze-thaw cycle is performed twice. Example 6

[0050] The operation mode of this embodiment is basically the same as that of embodiment 3, except that the freeze-thaw cycle is performed twice. Example 7

[0051] The operation of this embodiment is basically the same as that of embodiment 4, except that the freeze-thaw cycle is performed twice. Example 8

[0052] The operation mode of this embodiment is basically the same as that of embodiment 2, except that the freeze-thaw cycle is three times. Example 9

[0053] The operation mode of this embodiment is basically the same as that of embodiment 3, except that the freeze-thaw cycle is three times. Example 10

[0054] The operation mode of this embodiment is basically the same as that of embodiment 4, except that the freeze-thaw cycle is three times.

[0055] The ice adhesion strength was calculated by the shear force F applied when the ice layer fell off in the low-temperature environment box of Examples 1 to 10, and the results are shown in Table 1 below, wherein the coating was frozen for 7 days and its surface anti-ice shear strength was tested, and then frozen for another 7 days and tested again to see the change in its surface ice shear strength.

[0056] Table 1: Adhesion strength of ice coating under different coatings and freeze-thaw cycles

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An in-situ measurement device for ice adhesion of concrete and its coating, characterized in that: The invention comprises a low-temperature icing system and a measuring system connected thereto, wherein the low-temperature icing system comprises a low-temperature environment box, wherein a base is arranged in the low-temperature environment box, wherein a clamp assembly is arranged on the base, wherein the clamp assembly is used to clamp a concrete specimen to be tested, wherein a peelable ice cube mold is arranged on one side of the concrete specimen to be tested, wherein the ice cube mold is used to form ice coating on the concrete specimen to be tested; wherein a detachable shearing assembly is also arranged in the low-temperature environment box, wherein an output end of the shearing assembly acts on the ice coating, and an input end of the shearing assembly extends out of the low-temperature environment box and is connected to the measuring system, wherein the measuring system is used to transmit power and convert the shearing force generated by separating the ice coating from the concrete specimen to be tested into a digital signal, and to feed back the relationship between the shearing force and time.

2. The in-situ measuring device for ice adhesion of concrete and its coating according to claim 1 is characterized in that: The low-temperature environment box is provided with a sealed box door that can be opened and closed, and the sealed box door is provided with an observable transparent window; the low-temperature environment box provides a low temperature of not less than minus 20 degrees Celsius.

3. The in-situ measuring device for ice adhesion of concrete and its coating according to claim 1, characterized in that: The base is arranged horizontally, and at least one horizontal slide groove is provided on the base, the slide groove is used to connect the slider, the slider is connected to the clamp assembly, and a plurality of locking holes are also provided on the base, and the locking holes are connected to locking pieces to fix the slider.

4. The in-situ measurement device for ice adhesion of concrete and its coating according to claim 1, characterized in that: The clamp assembly includes a clamping frame, a slider is provided below the clamping frame and connected to the base, at least one side wall inside the clamping frame is provided with a clamping plate, the clamping plate is used to fix the concrete specimen to be tested, the clamping plate is connected to an adjusting screw, and the adjusting screw passes through the clamping frame and is connected to a locking handle.

5. The in-situ measuring device for ice adhesion of concrete and its coating according to claim 1, characterized in that: The ice cube mold is a cuboid or a cube with a cavity. One side of the ice cube mold is provided with an opening, the side where the opening is located is arranged toward the concrete specimen to be tested and tightly abuts against the outer surface of the concrete specimen to be tested, and a water injection hole is provided on the other side of the ice cube mold.

6. The in-situ measuring device for ice adhesion of concrete and its coating according to claim 5, characterized in that: The ice cube mold is made of silicone or elastic plastic material, and sealing glue is coated around the opening.

7. The in-situ measurement device for ice adhesion of concrete and its coating according to claim 1, characterized in that: The concrete specimen to be tested is a cement mortar specimen, or a cement mortar specimen with a coating on the surface.

8. The in-situ measurement device for ice adhesion of concrete and its coating according to claim 1, characterized in that: The shearing assembly comprises an upper pressure head, and a transmission shaft is connected to the upper pressure head; a clearance hole is provided on the low-temperature environment box, and the transmission shaft extends from the clearance hole and is connected to the measurement system.

9. The in-situ measurement device for ice adhesion of concrete and its coating according to claim 1, characterized in that: The measuring system comprises a mechanical testing machine and a host computer connected to the mechanical testing machine.

10. A method for testing the in-situ measurement device for ice adhesion of concrete and its coating according to any one of claims 1 to 9, characterized in that: The testing method comprises the following steps: Prepare the concrete specimen to be tested and keep it ready for use after curing; Using sealing glue to tightly connect the ice cube mold to one side of the concrete specimen to be tested; Placing the concrete specimen to be tested connected to the ice cube mold on the fixture assembly, and fixing the concrete specimen to be tested after adjusting the position; Pour water into the ice cube mold and close the low temperature environment box; Starting the low temperature environment box, freezing for several hours in a sub-zero low temperature environment until the water in the ice cube mold is completely frozen, and then quickly removing the sealing putty and the ice cube mold to obtain ice adhered to the concrete specimen to be tested; The measuring system is started to test the ice shear strength of the concrete specimen to be tested and the ice coating in situ; and an ice shear force-displacement relationship curve and a maximum ice shear force are obtained.

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