Concrete freezing resistance testing device

Abstract

The utility model provides a concrete freezing resistance test device which comprises a test base, a first positioning groove, a second positioning groove and a third positioning groove are formed in the test base, the first positioning groove is used for clamping a concrete test piece, and the second positioning groove and the third positioning groove are located on the same side of the first positioning groove; the excitation end of the first detection module is clamped in the second positioning groove and abuts against the excitation point of the concrete test piece, the vibration pick-up end of the first detection module is clamped in the third positioning groove and abuts against the vibration pick-up point of the concrete test piece, and the first detection module is used for detecting the natural vibration frequency of the concrete test piece. According to the concrete freezing resistance test device disclosed by the invention, stable detection of the natural vibration frequency of the concrete test piece by the first detection module is ensured, so that relatively large errors and even errors of test data are avoided, and efficient and accurate test requirements are met.

Description

Technical Field

[0001] The present disclosure relates to the technical field of concrete testing, and in particular to a concrete frost resistance testing device. Background Art

[0002] Concrete is a general term for engineering composite materials in which aggregates are bonded into a whole by cementitious materials. Concrete usually refers to cement as cementitious material, sand and stone as aggregates, mixed with water (which may contain admixtures and additives) in a certain proportion, and obtained by mixing. It is also called ordinary concrete and is widely used in civil engineering.

[0003] The frost resistance of concrete is an important indicator for assessing its durability. Currently, in concrete frost resistance tests, the specimen and the test device are mostly simply attached to each other, and the relative position is not fixed. In addition, due to the large vibration generated during the test, the specimen and the test device are easily separated, resulting in large errors or even mistakes in the test data, making it difficult to meet the needs of efficient and accurate testing. Summary of the Invention

[0004] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of the present disclosure is to provide a concrete frost resistance testing device.

[0006] To achieve the above-mentioned purpose, the present disclosure provides a concrete frost resistance testing device, comprising: a test base, the test base is provided with a first positioning groove, a second positioning groove and a third positioning groove, the first positioning groove is used to clamp the concrete specimen, the second positioning groove and the third positioning groove are respectively located on the same side of the first positioning groove, and a first preset distance is set between the second positioning groove and the first positioning groove, and a second preset distance is set between the third positioning groove and the first positioning groove; a first detection module, the excitation end of the first detection module is clamped in the second positioning groove and abuts against the excitation point of the concrete specimen, the vibration pickup end of the first detection module is clamped in the third positioning groove and abuts against the vibration pickup point of the concrete specimen, and the first detection module is used to detect the natural frequency of the concrete specimen.

[0007] Optionally, the first detection module includes: an exciter, which is clamped in the second positioning groove and abuts against the excitation point of the concrete specimen; a vibration pickup, which is clamped in the third positioning groove and abuts against the vibration pickup point of the concrete specimen; a dynamic elastic modulus meter, the output end of the dynamic elastic modulus meter is connected to the input end of the exciter, and the input end of the dynamic elastic modulus meter is connected to the output end of the vibration pickup, and the dynamic elastic modulus meter is used to detect the natural frequency of the concrete specimen to obtain the relative dynamic elastic modulus of the concrete specimen.

[0008] Optionally, the first detection module also includes: a first bracket and a second bracket, the first bracket and the second bracket both include: a positioning seat, a support rod, a support seat and a first positioning bolt, the support rod is arranged on the positioning seat, and the support seat is slidably arranged on the support rod in a vertical direction, and the threaded portion of the first positioning bolt is threadedly arranged on the support seat and abuts against the support rod; wherein, the positioning seat of the first bracket is clamped in the second positioning groove, and the exciter is arranged on the support seat of the first bracket; the positioning seat of the second bracket is clamped in the third positioning groove, and the vibration pickup is arranged on the support seat of the second bracket.

[0009] Optionally, the first detection module also includes: a first bracket and a second bracket, the first bracket includes: a support rod, a bracket and a second positioning bolt, the support rod is arranged on the test base, and the bracket is slidably arranged on the support rod along the vertical direction, the threaded portion of the second positioning bolt is threadedly arranged on the bracket and abuts against the support rod, and the bracket is provided with a limiting groove; wherein, the bottom of the exciter is clamped in the limiting groove of the first bracket, and the bottom of the vibration pickup is clamped in the limiting groove of the second bracket.

[0010] Optionally, the test base is provided with a fourth positioning groove, and the dynamic elastic modulus tester is clamped in the fourth positioning groove.

[0011] Optionally, the test device further includes: a second detection module, a detection end of the second detection module is arranged at the bottom of the first positioning groove, and the second detection module is used to detect the quality of the concrete specimen.

[0012] Optionally, the second detection module includes: a gravity sensor, which is arranged at the bottom of the first positioning groove; a mass loss meter, the input end of the mass loss meter is connected to the output end of the gravity sensor, and the mass loss meter is used to detect the mass of the concrete specimen to obtain the mass loss rate of the concrete specimen.

[0013] Optionally, the second detection module further includes: a display screen, which is arranged on the test base, and an input end of the display screen is respectively connected to an output end of the gravity sensor and an output end of the mass loss meter.

[0014] Optionally, the test device further includes: a buffer pad, which is arranged at the bottom of the first positioning groove, and the detection end of the second detection module is arranged between the buffer pad and the bottom of the first positioning groove.

[0015] Optionally, at least one hollow groove is provided at the bottom of the test base.

[0016] The technical solution provided by the present disclosure may have the following beneficial effects:

[0017] Since the concrete specimen is clamped in the first positioning groove, and the excitation end of the first detection module is clamped in the second positioning groove, and the vibration pickup end of the first detection module is clamped in the third positioning groove, the concrete specimen and the excitation end and the vibration pickup end of the first detection module can achieve a fixed relative position by utilizing the clamping limit of the first positioning groove, the second positioning groove and the third positioning groove, thereby avoiding the problem of separation when the excitation point of the concrete specimen and the excitation end of the first detection module are abutted, and when the vibration pickup point of the concrete specimen and the vibration pickup end of the first detection module are abutted, thereby ensuring the stable detection of the natural frequency of the concrete specimen by the first detection module, thereby avoiding large errors or even mistakes in the test data, and meeting the requirements of efficient and accurate testing.

[0018] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 Schematic diagram of the structure of a concrete frost resistance test device proposed in one embodiment of the present disclosure;

[0021] Figure 2 1 is a schematic structural diagram of a test base in a concrete frost resistance test device according to an embodiment of the present disclosure;

[0022] Figure 3 1 is a schematic structural diagram of a first bracket and a first support in a concrete frost resistance test device according to an embodiment of the present disclosure;

[0023] Figure 4 1 is a schematic structural diagram of a bracket in a concrete frost resistance test device according to an embodiment of the present disclosure;

[0024] As shown in the figure: 1. Test base, 11. First positioning slot, 12. Second positioning slot, 13. Third positioning slot, 14. Fourth positioning slot;

[0025] 2. First detection module, 21. Vibrator, 22. Vibration pickup, 23. Dynamic elastic modulus measuring instrument;

[0026] 24. First bracket, 241. Positioning seat, 242. Support rod, 243. Support seat, 244. First positioning bolt;

[0027] 25. First bracket, 251. Support rod, 252. Support seat, 253. Second positioning bolt;

[0028] 3. Gravity sensor, 4. Buffer pad, 5. Concrete specimen. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the present disclosure include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0030] like Figure 1 and Figure 2 As shown, the embodiment of the present disclosure proposes a concrete frost resistance test device, including: a test base 1 and a first detection module 2, the test base 1 is provided with a first positioning groove 11, a second positioning groove 12 and a third positioning groove 13, the first positioning groove 11 is used to clamp the concrete specimen 5, the second positioning groove 12 and the third positioning groove 13 are respectively located on the same side of the first positioning groove 11, and a first preset distance is set between the second positioning groove 12 and the first positioning groove 11, and a second preset distance is set between the third positioning groove 13 and the first positioning groove 11, the excitation end of the first detection module 2 is clamped in the second positioning groove 12 and abuts against the excitation point of the concrete specimen 5, the pickup end of the first detection module 2 is clamped in the third positioning groove 13 and abuts against the pickup point of the concrete specimen 5, and the first detection module 2 is used to detect the natural frequency of the concrete specimen 5.

[0031] It can be understood that since the excitation end of the first detection module 2 is in contact with the excitation point of the concrete specimen 5, and the pickup end of the first detection module 2 is in contact with the pickup point of the concrete specimen 5, the first detection module 2 can use the excitation end to transmit vibration signals to the excitation point of the concrete specimen 5, and use the pickup end to collect vibration signals from the pickup point of the concrete specimen 5, thereby realizing the detection of the natural frequency of the concrete specimen 5, and then using the natural frequency to realize the evaluation of the frost resistance index of the concrete.

[0032] In addition, since the concrete specimen 5 is clamped in the first positioning groove 11, and the excitation end of the first detection module 2 is clamped in the second positioning groove 12, and the vibration pickup end of the first detection module 2 is clamped in the third positioning groove 13, the concrete specimen 5 and the excitation end and the vibration pickup end of the first detection module 2 can achieve a fixed relative position by utilizing the clamping limit of the first positioning groove 11, the second positioning groove 12 and the third positioning groove 13, thereby avoiding the problem of separation when the excitation point of the concrete specimen 5 and the excitation end of the first detection module 2 are abutted and when the vibration pickup point of the concrete specimen 5 and the vibration pickup end of the first detection module 2 are abutted, thereby ensuring the stable detection of the natural frequency of the concrete specimen 5 by the first detection module 2, thereby avoiding large errors or even mistakes in the test data, and meeting the requirements of efficient and accurate testing.

[0033] It should be noted that the dynamic elastic modulus is one of the important indicators of concrete frost resistance test. The calculation formula of the relative dynamic elastic modulus is as follows:

[0034]

[0035] Among them, P i represents the relative dynamic elastic modulus in the i-th antifreeze test result, f i represents the natural frequency during the i-th antifreeze test, and f0 represents the initial natural frequency of the concrete specimen 5 to be tested.

[0036] It can be seen from this that the relative dynamic elastic modulus of the concrete specimen 5 can be accurately calculated by detecting the natural frequency. Moreover, when the relative dynamic elastic modulus drops to 60%, the concrete specimen 5 can be considered to have been destroyed, and the corresponding number of freeze-thaw cycles is used as the frost resistance grade of the concrete.

[0037] The concrete specimen 5 is a test block supported by concrete. The specific type of the concrete specimen 5 can be set according to actual needs and is not limited to this. For example, the concrete specimen 5 can be a rectangular parallelepiped with a length, width and height of 400 mm, 100 mm and 100 mm respectively. The excitation point is located at half the length and half the height of the side of the concrete specimen 5, and the pickup point is located at half the height and 5 mm length of the side of the concrete specimen 5.

[0038] The test base 1 is used to carry the concrete test piece 5 and realize the integrated arrangement of the first detection module 2, so as to facilitate the carrying, storage and use of the test device. At the same time, the first positioning groove 11, the second positioning groove 12 and the third positioning groove 13 are used to realize the relative position fixation of the concrete test piece 5, the excitation end of the first detection module 2 and the vibration pickup end of the first detection module 2, thereby ensuring the stable detection of the natural frequency and eliminating the steps of manual positioning, alignment and installation before each test, thereby improving the test efficiency and accuracy. The specific type of the test base 1 can be set according to actual needs and is not limited to this. For example, the test base 1 can be a base structure close to a rectangular parallelepiped; the size of the first positioning groove 11 and the concrete The dimensions of the specimen 5 are adapted, for example: the length and width of the first positioning groove 11 are 100 mm and 400 mm respectively, and the groove depth is less than 100 mm; the dimension of the second positioning groove 12 is adapted to the dimension of the excitation end of the first detection module 2, and the dimension of the third positioning groove 13 is adapted to the dimension of the pickup end of the first detection module 2; the relative positions of the first positioning groove 11, the second positioning groove 12 and the third positioning groove 13 are set according to the test requirements, for example: the excitation end of the first detection module 2 is set behind the second positioning groove 12, and the excitation end is facing the excitation point, and the pickup end of the first detection module 2 is set behind the third positioning groove 13, and the pickup end is facing the pickup point, and the first detection module 2 is used to measure the lateral natural frequency of the concrete specimen 5.

[0039] The first detection module 2 is used to detect the natural frequency of the concrete specimen 5. The excitation end of the first detection module 2 is in contact with the excitation point of the concrete specimen 5 and is used to transmit a vibration signal to the concrete specimen 5. The pickup end of the first detection module 2 is in contact with the pickup point of the concrete specimen 5 and is used to collect the vibration signal of the concrete specimen 5. The specific type of the first detection module 2 can be set according to actual needs and is not limited to this.

[0040] When performing the natural frequency detection, a thin layer of butter, vaseline, etc. may be applied between the excitation end of the first detection module 2 and the excitation point of the concrete specimen 5 as a coupling medium.

[0041] like Figure 1 As shown, in some embodiments, the first detection module 2 includes: an exciter 21, a vibration pickup 22 and a dynamic elastic modulus meter 23. The exciter 21 is clamped in the second positioning groove 12 and abuts against the excitation point of the concrete specimen 5. The vibration pickup 22 is clamped in the third positioning groove 13 and abuts against the pickup point of the concrete specimen 5. The output end of the dynamic elastic modulus meter 23 is connected to the input end of the exciter 21, and the input end of the dynamic elastic modulus meter 23 is connected to the output end of the vibration pickup 22. The dynamic elastic modulus meter 23 is used to detect the natural frequency of the concrete specimen 5 to obtain the relative dynamic elastic modulus of the concrete specimen 5.

[0042] It can be understood that, since the exciter 21 and the excitation point of the concrete specimen 5 are in contact, and the output end of the dynamic elastic modulus meter 23 is connected to the input end of the exciter 21, the dynamic elastic modulus meter 23 can use the exciter 21 to transmit a vibration signal to the excitation point of the concrete specimen 5. At the same time, since the pickup 22 and the pickup point of the concrete specimen 5 are in contact, and the input end of the dynamic elastic modulus meter 23 is connected to the output end of the pickup 22, the dynamic elastic modulus meter 23 can use the pickup 22 to collect vibration signals from the pickup point of the concrete specimen 5, thereby realizing the detection of the natural frequency of the concrete specimen 5, and then using the natural frequency to calculate the relative dynamic elastic modulus of the concrete specimen 5, and then using the relative dynamic elastic modulus to realize the evaluation of the frost resistance index of the concrete.

[0043] Moreover, since the vibrator 21 is clamped in the second positioning groove 12 and the vibration pickup 22 is clamped in the third positioning groove 13, the concrete specimen 5 and the vibrator 21 and the vibration pickup 22 can achieve a fixed relative position by utilizing the clamping limit of the first positioning groove 11, the second positioning groove 12 and the third positioning groove 13, thereby avoiding the problem of separation during the test, thereby ensuring the stable detection of the natural frequency of the concrete specimen 5 by the first detection module 2 and meeting the requirements of efficient and accurate testing.

[0044] It should be noted that the vibrator 21 is used to output a vibration signal to the concrete specimen 5 under the control of the dynamic elastic modulus measuring instrument 23. The specific type of vibrator 21 can be set according to actual needs and is not limited thereto. The vibrator 21 is a device used to convert electrical energy into mechanical energy. It is primarily used to input a vibration signal into a target object, causing it to vibrate. The vibrator 21 generally consists of a body and a power supply. The body includes a drive electrode, an oscillator, and a vibration head.

[0045] The vibration pickup 22 is used to collect the vibration signal from the concrete specimen 5 and transmit it to the dynamic elastic modulus measuring instrument 23. The specific type of the vibration pickup 22 can be set according to actual needs and is not limited to this. The vibration pickup 22 is a device that converts mechanical energy into electrical energy. It is used to convert the vibration signal emitted by the target object into an electrical signal for output. The operating principle of the vibration pickup 22 is opposite to that of the exciter 21. It mainly consists of a vibration head, a piezoelectric crystal, and a signal amplification circuit.

[0046] The dynamic elastic modulus measuring instrument 23 is used to obtain the relative dynamic elastic modulus of the concrete specimen 5 by using the cooperation of the exciter 21 and the vibration pickup 22. The specific type of the dynamic elastic modulus measuring instrument 23 can be set according to actual needs and is not limited to this.

[0047] like Figure 3As shown, in some embodiments, the first detection module 2 further includes: a first bracket 24 and a second bracket (not shown in the figure), each of the first bracket 24 and the second bracket includes: a positioning seat 241, a support rod 242, a support seat 243 and a first positioning bolt 244, the support rod 242 is arranged on the positioning seat 241, and the support seat 243 is slidably arranged on the support rod 242 along the vertical direction, and the threaded portion of the first positioning bolt 244 is threadedly arranged on the support seat 243 and abuts against the support rod 242. Among them, the positioning seat 241 of the first bracket 24 is clamped in the second positioning groove 12, and the exciter 21 is arranged on the support seat 243 of the first bracket 24; the positioning seat 241 of the second bracket is clamped in the third positioning groove 13, and the vibration pickup 22 is arranged on the support seat 243 of the second bracket.

[0048] It can be understood that since the support seat 243 is slidably set on the support rod 242 in the vertical direction, and the threaded portion of the first positioning bolt 244 is threadedly set on the support seat 243 and abuts against the support rod 242, the first bracket 24 and the second bracket both have the lifting function and the positioning function after lifting.

[0049] When the vibrator 21 is mounted on the support base 243 of the first bracket 24, the first bracket 24's lifting function can be used to adjust its height, and the first bracket 24's positioning function can be used to position the vibrator after the height adjustment. Furthermore, when the pickup 22 is mounted on the support base 243 of the second bracket, the second bracket's lifting function can be used to adjust its height, and the second bracket's positioning function can be used to position the vibrator after the height adjustment. Thus, the arrangement of the first bracket 24 and the second bracket facilitates the installation and positioning of the vibrator 21 and the pickup 22, thereby ensuring high testing efficiency.

[0050] It should be noted that the positioning seat 241 of the first bracket 24 is used to be clamped in the second positioning groove 12 to achieve rapid installation and positioning and avoid displacement during the test. The positioning seat 241 of the second bracket is used to be clamped in the third positioning groove 13 to achieve rapid installation and positioning and avoid displacement during the test. The specific type of the positioning seat 241 can be set according to actual needs and is not limited to this. For example, the positioning seat 241 is a disc-shaped structure, and the second positioning groove 12 and the third positioning groove 13 are both circular groove structures.

[0051] The support rod 242 is used to guide and support the seat 243. The specific type of the support rod 242 can be set according to actual needs and is not limited to this. For example, the support rod 242 is a rod structure arranged on the positioning seat 241 in the vertical direction.

[0052] The support seat 243 of the first bracket 24 is used to support the exciter 21, and the support seat 243 of the second bracket is used to support the vibration pickup 22. The specific type of the support seat 243 can be set according to actual needs and is not limited to this. For example, the support seat 243 is a seat body structure, and the support seat 243 has a sliding sleeve structure that is sleeved on the support rod 242.

[0053] The first positioning bolt 244 is used to fasten the support seat 243 to the support rod 242. The specific type of the first positioning bolt 244 can be set according to actual needs and is not limited to this.

[0054] like Figure 3 and Figure 4 As shown, in some embodiments, the first detection module 2 further includes: a first bracket 25 and a second bracket (not shown in the figure), the first bracket 25 includes: a support rod 251, a bracket 252, and a second positioning bolt 253. The support rod 251 is set on the test base 1, and the bracket 252 is slidably set on the support rod 251 along the vertical direction. The threaded portion of the second positioning bolt 253 is threadedly set on the bracket 252 and abuts against the support rod 251. The bracket 252 is provided with a limiting groove. The bottom of the exciter 21 is clamped in the limiting groove of the first bracket 25, and the bottom of the vibration pickup 22 is clamped in the limiting groove of the second bracket.

[0055] It can be understood that since the bracket 252 is slidably set on the support rod 251 in the vertical direction, and the threaded portion of the second positioning bolt 253 is threadedly set on the bracket 252 and abuts against the support rod 251, the first bracket 25 and the second bracket both have the lifting function and the positioning function after lifting.

[0056] Among them, since the bottom of the exciter 21 is stuck in the limiting groove of the first bracket 25, when the first positioning bolt 244 of the first bracket 24 is loosened due to vibration, the exciter 21 can still maintain stable contact with the excitation point of the concrete specimen 5 by utilizing the support and limitation of the first bracket 25. At the same time, since the bottom of the vibration pickup 22 is stuck in the limiting groove of the second bracket, when the first positioning bolt 244 of the second bracket is loosened due to vibration, the vibration pickup 22 can still maintain stable contact with the vibration pickup point of the concrete specimen 5 by utilizing the support and limitation of the second bracket. Therefore, dual support protection of the exciter 21 and the vibration pickup 22 is achieved by utilizing the first bracket 24 and the first bracket 25 as well as the second bracket and the second bracket, thereby ensuring efficient and accurate detection of the natural frequency.

[0057] It should be noted that the support rod 251 is used to guide and support the support base 252. The specific type of the support rod 251 can be set according to actual needs and is not limited to this. For example, the support rod 251 is a rod structure arranged in the vertical direction on the test base 1.

[0058] The bracket 252 of the first bracket 25 is used to support and limit the exciter 21 by using the limiting groove, and the bracket 252 of the second bracket is used to support and limit the vibration pickup 22 by using the limiting groove. The specific type of the bracket 252 can be set according to actual needs and is not limited to this. For example, the bracket 252 is a seat structure, and the bracket 252 has a sliding sleeve structure that is sleeved on the support rod 251.

[0059] The second positioning bolt 253 is used to fasten the bracket 252 to the supporting rod 251. The specific type of the second positioning bolt 253 can be set according to actual needs and is not limited to this.

[0060] like Figure 2 As shown, in some embodiments, the test base 1 is provided with a fourth positioning groove 14 , and the dynamic elastic modulus measuring instrument 23 is clamped in the fourth positioning groove 14 .

[0061] It can be understood that since the dynamic elastic modulus measuring instrument 23 is clamped in the fourth positioning groove 14, the dynamic elastic modulus measuring instrument 23 can use the fourth positioning groove 14 to achieve rapid arrangement on the test base 1. At the same time, during the test, it also avoids problems such as position offset due to vibration, thereby ensuring the stable acquisition of the dynamic elastic modulus.

[0062] It should be noted that the fourth positioning groove 14 is used to clamp the dynamic elastic modulus measuring instrument 23. The specific type of the fourth positioning groove 14 can be set according to actual needs and is not limited to this. In order to facilitate wiring, the second positioning groove 12 and the third positioning groove 13 can be located between the first positioning groove 11 and the fourth positioning groove 14.

[0063] In some embodiments, the test device further includes: a second detection module, a detection end of the second detection module is disposed at the bottom of the first positioning groove 11 , and the second detection module is used to detect the quality of the concrete specimen 5 .

[0064] It can be understood that since the detection end of the second detection module is arranged at the bottom of the first positioning groove 11, the second detection module can detect the quality of the concrete specimen 5, thereby using the quality to realize the evaluation of the frost resistance index of the concrete, and also realizes the centralized arrangement of the second detection module and the first detection module 2 on the test base 1, thereby avoiding the concrete specimen 5 from being lifted between multiple detection modules, which not only improves the test efficiency, but also reduces the risk of collision and damage to the concrete specimen 5.

[0065] It should be noted that the mass loss rate is one of the important indicators of concrete frost resistance test. The calculation formula of the mass loss rate is as follows:

[0066]

[0067] Among them, Wi represents the mass loss rate in the i-th antifreeze test result, m i represents the actual mass during the i-th antifreeze test, and m0 represents the initial mass of the concrete specimen 5 to be tested.

[0068] It can be seen from this that through quality testing, the mass loss rate of concrete specimen 5 can be accurately calculated, and when the relative mass loss rate reaches 5%, it can be considered that concrete specimen 5 has reached destruction, and the corresponding number of freeze-thaw cycles is used as the frost resistance grade of the concrete.

[0069] like Figure 2 As shown, in some embodiments, the second detection module includes: a gravity sensor 3 and a mass loss meter (not shown in the figure), the gravity sensor 3 is arranged at the bottom of the first positioning groove 11, the input end of the mass loss meter is connected to the output end of the gravity sensor 3, and the mass loss meter is used to detect the mass of the concrete specimen 5 to obtain the mass loss rate of the concrete specimen 5.

[0070] It can be understood that since the gravity sensor 3 is arranged at the bottom of the first positioning groove 11, the input end of the mass loss meter is connected to the output end of the gravity sensor 3, so that the gravity sensor 3 can detect the mass of the concrete specimen 5 in the first positioning groove 11 and send the mass signal to the mass loss meter, so that the mass loss meter uses the mass of the concrete specimen 5 to obtain the mass loss rate of the concrete specimen 5, thereby realizing the evaluation of the frost resistance index of the concrete.

[0071] It should be noted that the gravity sensor 3 is used to detect the mass of the concrete specimen 5 . The specific type of the gravity sensor 3 can be set according to actual needs and is not limited thereto.

[0072] The mass loss measuring instrument is used to calculate the mass loss rate of the concrete specimen 5 according to the mass collected by the gravity sensor 3 . The specific type of the mass loss measuring instrument can be set according to actual needs and is not limited thereto.

[0073] In some embodiments, the second detection module further includes: a display screen, which is disposed on the test base 1 , and an input end of the display screen is respectively connected to an output end of the gravity sensor 3 and an output end of the mass loss meter.

[0074] It can be understood that since the input end of the display screen is respectively connected to the output end of the gravity sensor 3 and the output end of the mass loss meter, the display screen can display the mass detected by the gravity sensor 3 and the mass loss rate calculated by the mass loss meter, thereby making the frost resistance test of concrete more efficient and intuitive.

[0075] It should be noted that the display screen is used to display parameter information during the test, such as the mass detected by the gravity sensor 3, the mass loss rate calculated by the mass loss meter, etc. The specific type of the display screen can be set according to actual needs and is not limited to this.

[0076] like Figure 2 As shown, in some embodiments, the test device further includes: a buffer pad 4, which is arranged at the bottom of the first positioning groove 11, and the detection end of the second detection module is arranged between the buffer pad 4 and the bottom of the first positioning groove 11.

[0077] It can be understood that since the buffer pad 4 is arranged at the bottom of the first positioning groove 11, and the detection end of the second detection module is arranged between the buffer pad 4 and the bottom of the first positioning groove 11, the buffer pad 4 can be used to reduce the collision and wear between the second detection module and the concrete specimen 5, thereby effectively extending the service life of the second detection module and ensuring the accurate testing of the concrete specimen 5.

[0078] It should be noted that the buffer pad 4 is used for buffering protection between the second detection module and the concrete specimen 5. The specific type of the buffer pad 4 can be set according to actual needs and is not limited to this.

[0079] In some embodiments, the bottom of the test base 1 is provided with at least one hollow groove.

[0080] It can be understood that since at least one hollow groove is provided at the bottom of the test base 1, the test base 1 can reduce its weight while ensuring its own supporting capacity, and the hollow groove at the bottom is also convenient for lifting, thereby making the use of the test device more convenient.

[0081] It should be noted that the specific type of the hollow groove can be set according to actual needs and is not limited to this.

[0082] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0083] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0084] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0085] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A concrete frost resistance test device, characterized in that: include: A test base, wherein the test base is provided with a first positioning groove, a second positioning groove, and a third positioning groove, the first positioning groove is used to clamp a concrete specimen, the second positioning groove and the third positioning groove are respectively located on the same side of the first positioning groove, and a first preset distance is set between the second positioning groove and the first positioning groove, and a second preset distance is set between the third positioning groove and the first positioning groove; The first detection module, the excitation end of the first detection module is clamped in the second positioning groove and abuts against the excitation point of the concrete specimen, the pickup end of the first detection module is clamped in the third positioning groove and abuts against the pickup point of the concrete specimen, and the first detection module is used to detect the natural frequency of the concrete specimen.

2. The concrete frost resistance testing device according to claim 1, characterized in that: The first detection module includes: a vibration exciter, the vibration exciter being clamped in the second positioning groove and abutting against an excitation point of the concrete specimen; a vibration pickup, the vibration pickup being clamped in the third positioning groove and abutting against a vibration pickup point of the concrete specimen; A dynamic elastic modulus measuring instrument, wherein the output end of the dynamic elastic modulus measuring instrument is connected to the input end of the exciter, and the input end of the dynamic elastic modulus measuring instrument is connected to the output end of the vibration pickup. The dynamic elastic modulus measuring instrument is used to detect the natural frequency of the concrete specimen to obtain the relative dynamic elastic modulus of the concrete specimen.

3. The concrete frost resistance testing device according to claim 2, characterized in that: The first detection module further includes: A first bracket and a second bracket, each of the first bracket and the second bracket comprises: a positioning seat, a support rod, a support seat and a first positioning bolt, the support rod being arranged on the positioning seat, and the support seat being slidably arranged on the support rod in a vertical direction, and a threaded portion of the first positioning bolt being threadedly arranged on the support seat and abutting against the support rod; Wherein, the positioning seat of the first bracket is clamped in the second positioning groove, and the exciter is arranged on the supporting seat of the first bracket; The positioning seat of the second bracket is clamped in the third positioning groove, and the vibration pickup is arranged on the supporting seat of the second bracket.

4. The concrete frost resistance testing device according to claim 3, characterized in that: The first detection module further includes: a first bracket and a second bracket, wherein the first bracket comprises: a support rod, a support seat, and a second positioning bolt, the support rod being arranged on the test base, and the support seat being slidably arranged on the support rod along a vertical direction, the threaded portion of the second positioning bolt being threadedly arranged on the support seat and abutting against the support rod, and the support seat being provided with a limiting groove; Wherein, the bottom of the exciter is clamped in the limiting groove of the first bracket, and the bottom of the vibration pickup is clamped in the limiting groove of the second bracket.

5. The concrete frost resistance testing device according to claim 2, characterized in that: The test base is provided with a fourth positioning groove, and the dynamic elastic modulus measuring instrument is clamped in the fourth positioning groove.

6. The concrete frost resistance testing device according to claim 1, characterized in that: The test device also includes: The second detection module has a detection end disposed at the bottom of the first positioning groove, and the second detection module is used to detect the quality of the concrete specimen.

7. The concrete frost resistance testing device according to claim 6, characterized in that: The second detection module includes: A gravity sensor is disposed at the bottom of the first positioning groove; A mass loss measuring instrument, wherein the input end of the mass loss measuring instrument is connected to the output end of the gravity sensor, and the mass loss measuring instrument is used to detect the mass of the concrete specimen to obtain the mass loss rate of the concrete specimen.

8. The concrete frost resistance testing device according to claim 7, characterized in that: The second detection module further includes: A display screen is arranged on the test base, and an input end of the display screen is respectively connected to an output end of the gravity sensor and an output end of the mass loss measuring instrument.

9. The concrete frost resistance testing device according to claim 6, characterized in that: The test device also includes: A buffer pad is arranged at the bottom of the first positioning groove, and a detection end of the second detection module is arranged between the buffer pad and the bottom of the first positioning groove.

10. The concrete frost resistance testing device according to claim 1, characterized in that: The bottom of the test base is provided with at least one hollow groove.

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