EMAS ultra-lightweight concrete material impact resistance testing device and evaluation method

Abstract

The present application relates to the technical field of impact resistance detection of ultra-light concrete materials for EMAS, and discloses an impact resistance detection device for ultra-light concrete materials for EMAS, including a frame body, a steel ball, and a test piece. The frame body is provided with a double-hole track column for guiding the steel ball to fall, the cross section of the double-hole track column is two circular holes, and the two circular holes have an intersection. The detection device also includes a bottom plate, the test piece is installed on the bottom plate, and the double-hole track column and the test piece are spaced apart. The detection device also includes an information acquisition component, and the information acquisition component includes a forward high-speed camera, a lateral high-speed camera, and a control terminal, and the forward high-speed camera and the lateral high-speed camera are both electrically connected to the control terminal. The present application can obtain more accurate data on the impact resistance of ultra-light concrete materials for EMAS.

Description

Technical Field

[0001] The present application relates to the technical field of impact resistance detection of ultra-light concrete materials for EMAS, and in particular to an impact resistance detection device and an evaluation method for ultra-light concrete materials for EMAS. Background Art

[0002] With the rapid development of aviation, the safety of runways has received more and more attention. As an important runway safety facility, the performance of the Engineered Material Arresting System (EMAS) is directly related to the safety of the aircraft when it runs off the runway. my country has currently developed ultra-lightweight concrete as the core energy-absorbing material of EMAS. Its light weight and low strength properties enable it to effectively absorb energy when the aircraft impacts, while avoiding excessive damage to the aircraft and passengers.

[0003] Traditional concrete mechanical properties testing methods, such as GB / T50081-2002 "Standard for Test Methods for Mechanical Properties of Ordinary Concrete", cover many aspects of concrete mechanical properties testing, but do not provide targeted testing methods for the special performance requirements of ultra-lightweight concrete materials for EMAS. Related technologies have also developed a double-hole penetration compression test method to determine the relationship between compression load and deformation through compression depth or load value to approach the true mechanical properties of foam materials during destruction. However, this method cannot obtain the impact toughness index of EMAS ultra-lightweight concrete. Therefore, it is still necessary to develop an impact resistance evaluation method suitable for ultra-lightweight concrete materials for EMAS. Summary of the invention

[0004] In order to obtain data on the impact resistance of ultra-light concrete materials for EMAS, the present application provides a device for detecting the impact resistance of ultra-light concrete materials for EMAS and an evaluation method.

[0005] In the first aspect, the present application provides an ultra-lightweight concrete material impact resistance testing device for EMAS, which adopts the following technical solution:

[0006] An EMAS ultra-lightweight concrete material impact resistance testing device comprises a frame body, a steel ball and a test piece, wherein a double-hole track column for guiding the steel ball to fall is installed on the frame body, the cross section of the double-hole track column is two circular holes and the two circular holes have an intersection, the steel ball contacts one of the hole walls of the double-hole track column, the testing device further comprises a bottom plate, the test piece is installed on the bottom plate, the test piece is located below the double-hole track column, a distance is left between the double-hole track column and the test piece, the testing device further comprises an information acquisition component, the information acquisition component comprises a forward high-speed camera, a lateral high-speed camera, and a control terminal, the forward high-speed camera and the lateral high-speed camera are both electrically connected to the control terminal.

[0007] By adopting the above technical solution, the steel ball is allowed to fall freely from the set impact height, and is guided by the double-hole guide column to hit the predetermined impact point of the test piece. A high-speed camera is used to take pictures from the side and the front respectively. The photos are then analyzed by the software of the control terminal to calculate the height of the first rebound of the steel ball and the depth of the depression of the test piece after the impact, and the impact absorption energy of the test piece is calculated; the steel ball is taken out of the test piece, and when the steel ball falls down for the second time, the steel ball falls through the other circular hole of the double-hole guide column, so that when the steel ball hits the test piece, part of The steel ball just overlaps with the first impact position on the impact surface. When the steel ball applies downward force, there is no lateral pressure on the side of the previous impact position, which can simulate the unilateral state of no lateral pressure when the wheel slides forward. This can ensure that the test piece is close to the actual application scenario during the experiment, and overcome the defect of the existing single-hole impact test method that cannot reflect the real compression boundary. Therefore, the two drops of the steel ball simulate the state of the test piece being impacted when the wheel slides forward, and then the impact resistance data of the ultra-light concrete material for EMAS is obtained, which provides the accuracy and reliability of the test.

[0008] Optionally, two clamping baffles for clamping the test piece are installed on the bottom plate, and the clamping baffles are slidably installed on the bottom plate.

[0009] By adopting the above technical solution, two clamping baffles for clamping the test piece are installed on the bottom plate and designed to be slidably installed, which is convenient for rapid adjustment according to the size of different test pieces, thereby improving the adaptability and flexibility of the detection device. At the same time, the sliding installation of the clamping baffles also facilitates the replacement of different types of test pieces to meet diverse test needs.

[0010] Optionally, a slide groove is provided on the bottom plate, the length direction of the slide groove extends along the diagonal line of the test piece, and the two clamping baffles are slidably installed in the slide groove.

[0011] By adopting the above technical solution, the slide groove opened on the bottom plate extends along the diagonal of the test piece. This design optimizes the fixing method of the test piece, so that the clamping baffle can clamp the test piece more stably, avoiding displacement or loosening during the impact process, and further improving the stability and accuracy of the detection.

[0012] Optionally, a hollow guide rail is installed on the frame body, and the steel ball falls from the hollow guide rail into the double-hole rail column. The detection device also includes a magnetic fixture for adsorbing or releasing the steel ball, and the magnetic fixture is installed on the hollow guide rail.

[0013] By adopting the above technical solution, introducing the hollow guide rail and magnetic fixture, the smooth transition of the steel ball from the hollow guide rail to the double-hole track column is achieved, ensuring the accuracy of the steel ball's falling trajectory. At the same time, the magnetic fixture can absorb or release the steel ball as needed, making it easier to control the start and end of the test, thereby improving the automation of the test and the convenience of operation.

[0014] Optionally, the detection device also includes a lifting assembly, which includes a plurality of vertical guide rods and a support frame slidably mounted on the guide rods, the hollow guide rail is mounted on the support frame, and the lifting assembly also includes a support block for supporting the support frame, and the support block is threadedly mounted on the guide rods.

[0015] By adopting the above technical solution, the design of the lifting assembly makes the height of the hollow guide rail adjustable, so as to meet the detection requirements of steel balls falling from different heights. In addition, the cooperation of the support block and the guide rod ensures the stability and safety of the lifting process of the hollow guide rail, providing a strong guarantee for the smooth progress of the test.

[0016] Optionally, the hollow guide track is detachably connected to a telescopic rod, one end of the telescopic rod is fixedly connected to the support frame, and the double-hole track column is detachably mounted on the frame body.

[0017] By adopting the above technical solution, the detachable connection between the hollow guide rail and the telescopic rod, and the detachable installation of the double-hole track column, double-hole track columns and hollow guide rails of different sizes can be replaced to accommodate steel balls of different sizes. This modular design also facilitates the maintenance and upgrading of the equipment and extends the service life of the equipment.

[0018] Optionally, an adjustment assembly is installed on the frame body, and the adjustment assembly includes two adjustment rods, and the adjustment rods are threadedly installed on the frame body. The adjustment assembly also includes two adjustment rings, and the adjustment rings are rotatably installed on one end of the adjustment rods. The two adjustment rings clamp the double-hole track column.

[0019] By adopting the above technical solution, the double-hole track column can be accurately adjusted and fixed through the telescopic adjustment rod and adjustment ring. This design not only improves the stability of the double-hole track column installation, but also ensures the precise control of the steel ball falling trajectory, further improving the accuracy and reliability of the detection.

[0020] In the second aspect, the present application provides an evaluation method for an ultra-lightweight concrete material impact resistance testing device for EMAS, which adopts the following technical solution:

[0021] The evaluation method of the EMAS ultra-light concrete material impact resistance testing device is evaluated according to the above-mentioned EMAS ultra-light concrete material impact resistance testing device, and is specifically implemented through the following steps:

[0022] Step 1, select the size of the steel ball and double-hole track column according to the test;

[0023] Step 2: Make a test piece according to the test requirements, and the length, width and height of the test piece should not be less than 3 times the diameter of the steel ball;

[0024] Step 3, select one on the test piece as an impact surface, and mark two impact positions of the steel ball on the impact surface; the two impact positions intersect circularly, and the midpoint of the intersection is located at the intersection of the two diagonals of the test piece on the impact surface;

[0025] Step 4, check each functional module of the detection device to ensure normal operation;

[0026] Step 5, make the steel ball be located just above the double-hole track column in the vertical direction; place the test piece on the bottom plate, and adjust the position of the test piece to ensure that the first steel ball just overlaps with the first impact position on the impact surface;

[0027] Step 6, start the information collection component, make the first steel ball fall freely along the double-hole track column, and use the camera to shoot from the side and front respectively;

[0028] Step 7. Carefully remove the first steel ball and save the video shot by the camera;

[0029] Step 8: Visually inspect the test piece to see if it is damaged. If so, jump directly to step 10. If not, adjust the position of the bottom plate to ensure that the second steel ball overlaps the second impact position on the impact surface.

[0030] Step 9, repeat steps 6 to 8 to achieve a second impact on the test piece;

[0031] Step 10, remove the test piece and repeat the measurement of the next test piece or turn off the equipment to end the test;

[0032] Step 11: Analyze the depth of the test piece and the height of the steel ball bounce recorded by the camera, and use the formula to calculate the absorption capacity E of the test piece. inpact The relevant formula is as follows

[0033] E inpact =M0gh-M0gh1

[0034] Among them, M0 is the mass of the steel ball, g is the acceleration of gravity, h is the impact height of the steel ball, and h1 is the bounce height of the steel ball.

[0035] By adopting the above technical solution, a detailed evaluation method is proposed to evaluate the performance of the detection device through a series of standardized steps. This method not only covers all aspects from equipment inspection to the end of the test, but also provides a specific calculation formula to quantify the absorption capacity of the test piece. This evaluation method provides clear guidance and basis for the use of the detection device, ensuring the objectivity and accuracy of the evaluation results.

[0036] In summary, the present application includes at least one of the following beneficial effects:

[0037] 1. Through the design of double-hole track columns and information collection components, the impact resistance of ultra-light concrete materials can be accurately tested, which improves the accuracy and reliability of the test results;

[0038] 2. The design of clamping baffles, slides, lifting components, etc. enables the detection device to be quickly adjusted and optimized according to different test requirements, improving the adaptability and flexibility of the equipment;

[0039] 3. The design of magnetic holder and detachable connection simplifies the test operation process and improves the automation and convenience of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0041] Figure 2 It is a schematic diagram of a partial top view of an embodiment of the present application;

[0042] Figure 3 This is a schematic diagram of the structure of an embodiment of the present application when the test piece is installed on a base plate;

[0043] Figure 4 is a schematic diagram of the structure of the lower surface of the bottom plate of the embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the structure of a hollow guide rail in an embodiment of the present application;

[0045] Figure 6 It is a schematic diagram of the structure of the lifting assembly embodied in the embodiment of the present application;

[0046] Figure 7 It is a schematic diagram of the circular intersection of two impact positions of the test piece embodied in an embodiment of the present application.

[0047] Explanation of the reference numerals: 10. Frame body; 11. Vertical column; 12. Hollow guide rail; 121. Telescopic rod; 1211. Outer rod; 1212. Inner rod; 122. Socket; 13. Magnetic fixer; 14. Fixing rod; 15. Positioning rod; 20. Steel ball; 30. Test piece; 40. Double-hole track column; 50. Bottom plate; 51. Slide; 60. Information acquisition assembly; 61. Forward high-speed camera; 62. Lateral high-speed camera; 63. Control terminal; 70. Clamping baffle; 71. Bolt; 72. Nut; 80. Lifting assembly; 81. Guide rod; 82. Support frame; 83. Support block; 84. Base; 90. Adjustment assembly; 91. Adjustment rod; 92. Adjustment ring. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-7 This application is described in further detail.

[0049] Reference Figure 1 and Figure 2 The device for testing the impact resistance of ultra-light concrete materials for EMAS provided in the embodiment of the present application includes a frame body 10, a steel ball 20 and a test piece 30. The test piece 30 is an ultra-light concrete material for EMAS with a cubic structure. A double-hole track column 40 for guiding the steel ball 20 to fall is installed on the frame body 10. The cross-section of the double-hole track column 40 is two circular holes and the two circular holes have an intersection. The steel ball 20 contacts one of the hole walls of the double-hole track column 40. The testing device also includes a bottom plate 50. The test piece 30 is installed on the bottom plate 50. The test piece 30 is located below the double-hole track column 40. The testing device also includes an information acquisition component 60. The information acquisition component 60 includes a forward high-speed camera 61, a lateral high-speed camera 62 and a control terminal 63. The forward high-speed camera 61 and the lateral high-speed camera 62 are both linearly connected to the control terminal 63. There is a distance between the double-hole track column 40 and the test piece 30. When the steel ball 20 bounces on the test piece 30, the double-hole track column 40 will not block the steel ball 20, so that the camera can clearly capture the bouncing state of the steel ball 20.

[0050] Reference Figure 1Specifically, the bottom plate 50 is used to carry and fix the test piece 30, and the test piece 30 is installed on the bottom plate 50. The material of the bottom plate 50 can be high-strength steel, which ensures the rigidity and strength of the bottom plate 50 and ensures that it can bear multiple impact loads without deformation. The frame part of the frame body 10 refers to the external structure of the entire detection device, which is mainly used to fix and support other components. The frame body 10 is composed of four columns 11, and the bottom plate 50 is located in the area enclosed by the four columns 11.

[0051] One implementation of the double-hole track post 40 is to use two parallel cylindrical tracks to form the double-hole track post 40, and another implementation is to use a cylinder with two circular holes. The steel ball 20 falls into one of the holes of the double-hole track post 40, and the contact between the double-hole track post 40 and the steel ball 20 is line contact.

[0052] The information acquisition component 60 is used to shoot and record the motion state of the steel ball 20 and the deformation of the test piece 30. The forward high-speed camera 61 is installed in front of the frame body 10, and the lateral high-speed camera 62 is installed on one side of the frame body 10, and both are connected to the control terminal 63. The forward high-speed camera 61 captures the motion trajectory of the steel ball 20 along the vertical direction, and the lateral high-speed camera 62 captures the motion trajectory of the steel ball 20 along the horizontal direction. The forward high-speed camera 61 adopts a high-performance high-speed camera to ensure that every detail of the high-speed moving steel ball 20 can be captured. The lateral high-speed camera 62 also adopts a high-performance high-speed camera, and its resolution and shooting rate are consistent with the forward high-speed camera 61, ensuring the consistency and high definition of the shooting effect.

[0053] The control terminal 63 is connected to the forward high-speed camera 61 and the lateral high-speed camera 62 by wire or wireless means to collect and process the captured image data. The control terminal 63 can be a high-performance computer equipped with a multi-core processor and a large-capacity memory to quickly process a large amount of image data.

[0054] Reference Figure 3 Two clamping baffles 70 for clamping the test piece 30 are installed on the bottom plate 50, and the clamping baffles 70 are slidably installed on the bottom plate 50. Specifically, the two clamping baffles 70 are slidably installed on the bottom plate 50 to clamp the test piece 30. The bottom plate 50 is a rectangular structure, and the cross section of the test piece 30 is also a rectangular structure.

[0055] Reference Figure 3 and Figure 4, the length direction of the slide groove 51 provided on the bottom plate 50 extends along the diagonal line of the test piece 30, and the two clamping baffles 70 are slidably installed in the slide groove 51. The cross section of the clamping baffle 70 is an L-shaped structure, and the lower end of the clamping baffle 70 is fixedly connected with a bolt 71, and the bolt 71 passes through the slide groove 51 and is threadedly connected with the nut 72. The bottom plate 50 is provided with a clearance groove for the nut 72 to slide. The position of the two clamping baffles 70 can be adjusted by adjusting the cooperation of the bolt 71 and the nut 72. When the nut 72 is tightened, the clamping baffle 70 is fixed on the bottom plate 50, and when the nut 72 is loosened, the clamping baffle 70 slides along the diagonal line of the bottom plate 50, ensuring that the position of the clamping baffle 70 is accurately controllable. The design of the slide groove 51 can ensure the stability of the clamping baffle 70 during the sliding process and reduce its shaking relative to the bottom plate 50. The length of the slide groove 51 can be adjusted according to the experimental requirements, which is sufficient to accommodate test pieces 30 of various sizes. By providing the slide groove 51 and the clamping baffle 70 on the bottom plate 50, the positioning and fixing of the test piece 30 are more accurate, which increases the reliability and accuracy of the experiment. At the same time, the sliding structure design of the clamping baffle 70 enables the experimenter to adjust the position of the test piece 30 more conveniently and quickly, thereby improving the efficiency of the experiment. In addition, the design of the combination of the slide groove 51 and the clamping baffle 70 can reduce the damage to the test piece 30 during the experiment, thereby improving the credibility and consistency of the experimental results.

[0056] Reference Figure 5 , a hollow guide track 12 is installed on the frame body 10, and the cross section inside the hollow guide track 12 for the steel ball 20 to pass through is also two circular holes, and the two circular holes have an intersection. The steel ball 20 falls from the hollow guide track 12 into the double-hole track column 40. A spacing may be left between the hollow guide track 12 and the double-hole track column 40. The detection device also includes a magnetic fixture 13 for adsorbing or releasing the steel ball 20. The magnetic fixture 13 is installed on the hollow guide track 12 and is located above the hollow guide track 12. The magnetic fixture 13 controls the steel ball 20 to leave the hollow guide track 12 or be located in the hollow guide track 12. The magnetic fixture 13 is a prior art and has not been improved, so it is not described in detail in the embodiments of the present application.

[0057] Referring to Figure 6, the detection device also includes a lifting assembly 80. The lifting assembly 80 includes a plurality of vertical guide rods 81 and a support frame 82 slidably mounted on the guide rods 81, and the hollow guide track 12 is mounted on the support frame 82. The guide rods 81 are distributed around the frame body 10, and the guide rods 81 are close to the columns 11. There are four guide rods 81, and the two guide rods 81 on the same side can be connected to the same base 84, and the lower end of the column 11 close to the guide rod 81 can also be fixedly mounted on the base 84. The lifting assembly 80 also includes a support block 83 for supporting the support frame 82, and the support block 83 is threadedly mounted on the guide rod 81. The support block 83 moves spirally along the height direction of the guide rod 81, and the support frame 82 abuts against the support block 83, so that the support frame 82 can support the hollow guide track 12.

[0058] Reference Figure 5 Further, the two opposite ends of the hollow guide track 12 are detachably connected with telescopic rods 121, and one end of the telescopic rod 121 is fixedly connected to the support frame 82, so that the position of the hollow guide track 12 can be adjusted in the horizontal direction. Specifically, the telescopic rod 121 includes an outer rod 1211 and an inner rod 1212, the outer rod 1211 is fixedly installed on the frame body 10, and the side wall of the hollow guide track 12 is provided with a socket 122 for the inner rod 1212 to be plugged in, and the inner rod 1212 is plugged in with the socket 122 of the hollow guide track 12. The outer rod 1211 and the inner rod 1212 can be sealed and matched through internal and external threads, and the inner rod 1212 can be extended and retracted along the direction of the outer rod 1211 by rotating the inner rod 1212. This telescopic rod 121 can not only adjust the position of the hollow guide track 12, but also ensure the stability of the connection.

[0059] Reference Figure 5 Furthermore, an adjustment assembly 90 is also installed on the frame body 10. The adjustment assembly 90 includes two adjustment rods 91. A fixing rod 14 is fixedly connected to the frame body 10, and the adjustment rod 91 is threadedly installed on the fixing rod 14. The adjustment assembly 90 also includes two adjustment rings 92. The adjustment ring 92 is rotatably installed on one end of the adjustment rod 91. The adjustment rod 91 changes its position with the adjustment ring 92, so that the two adjustment rings 92 can clamp the double-hole track column 40, thereby realizing the rapid replacement of the position of the double-hole track column 40. The adjustment ring 92 is an arc-shaped structure. The two adjustment rings 92 clamp the double-hole track column 40 so that the double-hole track column 40 is stably fixed on the frame body 10. The material of the adjustment ring 92 can be hard rubber, which can effectively clamp the double-hole track column 40 without causing damage to the double-hole track column 40. The setting of the adjustment rod 91 and the adjustment ring 92 allows the position of the double-hole track column 40 to be quickly adjusted, thereby improving the flexibility and applicability of the detection device. At the same time, this adjustment method ensures the stability and fixing effect of the double-hole track column 40.

[0060] During the specific test, the test piece 30 is first installed on the bottom plate 50. When the bottom plate 50 is fixed, the adjustment ring 92 of the adjustment assembly 90 is adjusted with the aid of a ruler so that the double-hole track column 40 is located above the test piece 30, and the steel ball 20 falls from the double-hole track column 40 into the center of the test piece 30, and then the position of the hollow guide track 12 is determined according to the position of the double-hole track column 40. When adjusting the lifting assembly 80, a ruler is also needed to assist in measurement so that the support blocks 83 on each guide rod 81 are at the same height, so that the entire falling process of the steel ball 20 is smooth and the falling position is accurate.

[0061] The implementation principle of the EMAS ultra-light concrete material impact resistance testing device of the embodiment of the present application is as follows: a testing device for evaluating the impact resistance of the EMAS ultra-light concrete material is constructed by using the cooperation of the frame body 10, the steel ball 20, the double-hole track column 40, the test piece 30 and the information collection component 60. The double-hole track column 40 is used to guide the steel ball 20 to fall along a predetermined path, which ensures the stability of the steel ball 20 during the falling process and improves the accuracy of the experiment;

[0062] Reference Figure 7 When the steel ball 20 falls from different circular holes of the double-hole track column 40 twice, when the steel ball 20 falls to position A for the first time, the steel ball 20 is subjected to all-round pressure. When the steel ball 20 falls to position B for the second time, the state of the wheel impacting the test piece 30 forward when the wheel rolls over the test piece 30 can be simulated. The position rolled over by the wheel is equivalent to position A, and the position being rolled by the wheel is equivalent to position B. When the steel ball 20 falls for the second time, the part close to position A is not subjected to pressure, which can simulate the state of no lateral pressure on one side of the wheel, so as to overcome the defect that the existing single-hole impact test method cannot reflect the real compression boundary, and provide the accuracy and reliability of the test.

[0063] The test piece 30 is mounted on the base plate 50 and fixed by a clamping baffle 70, providing accurate positioning of the impact position; the information acquisition component 60 can accurately record the dynamic behavior of the steel ball 20 before and after the fall and the changes of the test piece 30. The setting of the telescopic rod 121, the adjustment component 90, and the lifting component 80 makes the experimental device more flexible. By adjusting the size, position and height of the ball, different experimental conditions can be designed to meet the needs of various research and engineering applications, thereby ensuring the reliability and operability of the overall device.

[0064] The embodiment of the present application also discloses an evaluation method of an ultra-lightweight concrete material impact resistance detection device for EMAS.

[0065] The evaluation method of the EMAS ultra-light concrete material impact resistance testing device is evaluated according to the above-mentioned EMAS ultra-light concrete material impact resistance testing device, and is specifically implemented through the following steps:

[0066] Step 1, selecting the size of the steel ball 20 and the double-hole track column 40 according to the test;

[0067] Step 2, according to the test requirements, a cubic structure characteristic ultra-lightweight concrete material test piece 30 is manufactured, and the length, width and height of the test piece 30 are required to be no less than 3 times the diameter of the steel ball 20;

[0068] Step 3, select one on the test piece 30 as an impact surface, and mark two impact positions of the steel ball 20 on the impact surface; the two impact positions intersect circularly, and the midpoint of the intersection is located at the intersection of the two diagonals of the test piece 30 on the impact surface;

[0069] Step 4, check each functional module of the detection device to ensure normal operation;

[0070] Step 5, make the steel ball 20 be located just above the double-hole track column 40 in the vertical direction; place the test piece 30 on the bottom plate 50, and adjust the position of the test piece 30 to ensure that the first steel ball 20 just overlaps with the first impact position A on the impact surface;

[0071] Step 6, start the information collection component 60, make the first steel ball 20 fall freely along the double-hole track column 40, and use the camera to shoot from the side and front respectively;

[0072] Step 7, carefully take out the first steel ball 20 and save the video shot by the camera;

[0073] Step 8, visually observe whether the test piece 30 is damaged. If damaged, directly jump to step 10; if not damaged, adjust the position of the bottom plate 50 to ensure that the second steel ball 20 just overlaps with the second impact position B on the impact surface;

[0074] Step 9, repeating steps 6 to 8 to implement a second impact on the test piece 30;

[0075] Step 10, remove the test piece and repeat the measurement of the next test piece 30 or turn off the equipment to end the test;

[0076] Step 11: Analyze the depression depth of the test piece 30 and the bounce height of the steel ball 20 recorded by the camera, and calculate the absorption capacity E of the test piece 30 using the formula inpact The relevant formula is as follows

[0077] E inpact =M0gh-M0gh1

[0078] Wherein, M0 is the mass of the steel ball 20 , g is the acceleration of gravity, h is the impact height of the steel ball 20 , and h1 is the bounce height of the steel ball 20 .

[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. The device for testing the impact resistance of ultra-light concrete materials for EMAS is characterized by: The detection device comprises a frame body (10), a steel ball (20) and a test piece (30), wherein a double-hole track column (40) for guiding the steel ball (20) to fall is installed on the frame body (10), the cross section of the double-hole track column (40) is two circular holes and the two circular holes have an intersection, the steel ball (20) is in contact with one of the hole walls of the double-hole track column (40), the detection device further comprises a bottom plate (50), the test piece (30) is installed on the bottom plate (50), the test piece (30) is located below the double-hole track column (40), and a distance is left between the double-hole track column (40) and the test piece (30), and the detection device further comprises an information acquisition component (60), the information acquisition component (60) comprises a forward high-speed camera (61), a lateral high-speed camera (62), and a control terminal (63), and the forward high-speed camera (61) and the lateral high-speed camera (62) are both electrically connected to the control terminal (63); A hollow guide track (12) is installed on the frame body (10), and the steel ball (20) falls from the hollow guide track (12) into the double-hole track column (40). The detection device also includes a magnetic fixture (13) for adsorbing or releasing the steel ball (20), and the magnetic fixture (13) is installed on the hollow guide track (12); The detection device further comprises a lifting assembly (80), the lifting assembly (80) comprising a plurality of vertical guide rods (81) and a support frame (82) slidably mounted on the guide rods (81), the hollow guide rail (12) being mounted on the support frame (82), the lifting assembly (80) further comprising a support block (83) for supporting the support frame (82), the support block (83) being threadedly mounted on the guide rods (81); The hollow guide track (12) is detachably connected to a telescopic rod (121), one end of the telescopic rod (121) is fixedly connected to the support frame (82), and the double-hole track column (40) is detachably mounted on the frame body (10); An adjustment assembly (90) is mounted on the frame body (10), the adjustment assembly (90) comprising two adjustment rods (91), the adjustment rods (91) being threadedly mounted on the frame body (10), the adjustment assembly (90) further comprising two adjustment rings (92), the adjustment rings (92) being rotatably mounted on one end of the adjustment rods (91), the two adjustment rings (92) clamping the double-hole track column (40).

2. The device for detecting the impact resistance of ultra-light concrete material for EMAS according to claim 1 is characterized in that: Two clamping baffles (70) for clamping the test piece (30) are mounted on the bottom plate (50), and the clamping baffles (70) are slidably mounted on the bottom plate (50).

3. The device for detecting the impact resistance of ultra-light concrete material for EMAS according to claim 2 is characterized in that: The bottom plate (50) is provided with a slide groove (51), the length direction of the slide groove (51) extending along the diagonal line of the test piece (30), and the two clamping baffles (70) are slidably installed in the slide groove (51).

4. An evaluation method for an ultra-lightweight concrete material impact resistance testing device for EMAS, wherein the evaluation is performed according to the ultra-lightweight concrete material impact resistance testing device for EMAS according to any one of claims 1 to 3, characterized in that: This is achieved through the following steps: Step 1, selecting the sizes of the steel ball (20) and the double-hole track column (40) according to the test; Step 2, manufacturing a test piece (30) according to test requirements, requiring that the length, width and height of the test piece (30) be no less than three times the diameter of the steel ball (20); Step 3, selecting a surface on the test piece (30) as an impact surface, marking two impact positions of the steel ball (20) on the impact surface; the two impact positions intersect in a circular manner, and the midpoint of the intersection is located at the intersection of two diagonals of the test piece (30) on the impact surface; Step 4, check each functional module of the detection device to ensure normal operation; Step 5, placing the steel ball (20) just above the double-hole track column (40) in the vertical direction; placing the test piece (30) on the bottom plate (50), and adjusting the position of the test piece (30) to ensure that the first steel ball (20) just overlaps with the first impact position on the impact surface; Step 6, start the information collection component (60), make the first steel ball (20) fall freely along the double-hole track column (40), and use a camera to shoot from the side and front respectively; Step 7, carefully remove the first steel ball (20) and save the video recorded by the camera; Step 8, visually inspect the test piece (30) to see if it is damaged. If so, directly jump to step 10. If not, adjust the position of the bottom plate (50) to ensure that the second steel ball (20) just overlaps the second impact position on the impact surface; Step 9, repeating steps 6 to 8 to implement a second impact on the test piece (30); Step 10, removing the test piece (30), repeating the measurement of the next test piece (30) or closing the device to end the test; Step 11, analyzing the depression depth of the test piece (30) and the bounce height of the steel ball (20) recorded by the camera, and calculating the absorption capacity E of the test piece (30) using the formula inpact The relevant formula is as follows Yes inpact =M0gh-M0gh1 Wherein, M0 is the mass of the steel ball (20), g is the acceleration due to gravity, h is the impact height of the steel ball (20), and h1 is the bounce height of the steel ball (20).

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