Concrete elasticity modulus testing device

Abstract

The invention discloses a concrete elastic modulus testing device which comprises a base station, a stopping piece, an extruding piece, a first strain detecting piece and a second strain detecting piece. The stopping piece is arranged on the base station and provided with a stopping face. The extrusion part is arranged on the base station and is provided with an extrusion surface, the extrusion surface and the stop surface are oppositely arranged at an interval along the first direction, an extrusion cavity for extruding the to-be-tested part is formed between the extrusion surface and the stop surface, the extrusion surface is used for extruding one end surface of the to-be-tested part along the first direction, and the stop surface is used for stopping the part of the other end surface of the to-be-tested part along the first direction; the stop surface passes through the three-dimensional projection area of the to-be-tested piece along the first direction to form an extrusion part, and the rest part forms a shearing part; the first strain detection piece is used for being attached to the outer peripheral surface of the to-be-detected piece on the extrusion part in the first direction; the second strain detection piece is used for being attached to the outer peripheral face of the to-be-detected piece on the shearing part in the first direction.

Description

Technical Field

[0001] The invention relates to the field of concrete performance testing instruments, in particular to a concrete elastic modulus testing device. Background Art

[0002] After concrete is formed, it is often necessary to test the performance of the concrete in order to know the structural strength of the concrete. The structural strength test includes: tensile properties, elastic modulus and shear resistance, etc., which are generally tested by corresponding professional testing tools. Multiple different types of tests are required, which is inconvenient to use. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a concrete elastic modulus testing device, which can test multiple properties at the same time, making the test more efficient.

[0004] The concrete elastic modulus testing device according to an embodiment of the present invention comprises: abutment; A stopper, disposed on the base and having a stopper surface; An extrusion piece is provided on the base and has an extrusion surface. Along the first direction, the extrusion surface and the stop surface are opposite and spaced from each other. An extrusion cavity for extruding the workpiece to be tested is formed between the extrusion surface and the stop surface. The extrusion surface is used to extrude one end surface of the workpiece to be tested along the first direction. The stop surface is used to stop a portion of the other end surface of the workpiece to be tested along the first direction. The stop surface passes through a three-dimensional projection area of ​​the workpiece to be tested along the first direction to form an extrusion portion, and the remaining portion forms a shearing portion. A first strain detection member, used to be attached to the outer peripheral surface of the extrusion portion of the test piece along the first direction; The second strain detection member is used to adhere to the outer peripheral surface of the shearing portion of the test piece along the first direction.

[0005] The concrete elastic modulus testing device according to the embodiment of the present invention has at least the following beneficial effects: a part of the workpiece to be tested is stopped by a stopper, and when the workpiece to be tested is squeezed by an extrusion member, the shearing part of the workpiece to be tested will move along a first direction relative to the extrusion part, and the shearing part is subjected to shearing, while the extrusion part is squeezed along the first direction by the stopper and the extrusion member, and the extrusion part is subjected to elastic compression. The first strain detection member is arranged at the extrusion part to detect the strain amount generated by the compression of the workpiece to be tested, and then the elastic modulus is calculated. The second strain detection member is arranged at the shearing part to detect the shear strength of the workpiece to be tested, so as to realize the detection of multiple properties of the workpiece to be tested in the same test process, thereby improving the detection efficiency.

[0006] According to some embodiments of the present invention, it also includes: a height indicating component, the height indicating component includes a first indicator and a second indicator, the first indicator is used to indicate a first height L1 of the stopper relative to the base along a second direction, the second indicator is used to indicate a second height L2 of the test piece relative to the base along the second direction, the second direction is perpendicular to the first direction, and the concrete elastic modulus testing device satisfies: L2=L1*N.

[0007] According to some embodiments of the present invention, the height indicating assembly further includes a first gear, a second gear, a third gear and a first driving member transmission-connected to the first gear, the first gear is meshed with the second gear, the transmission ratio between the first gear and the second gear is N1, the second gear is transmission-connected to the first indicating member, the third gear is coaxially connected to the first gear, the transmission ratio between the first gear and the third gear is N2, the third gear is transmission-connected to the second indicating member, and the height indicating assembly satisfies: L2=L1*N1 / N2.

[0008] According to some embodiments of the present invention, the height indicating assembly further comprises a first rack and a second rack, the first rack being transmission-connected to the second gear and the first indicating member along the second direction, and the second gear being transmission-connected to the third gear and the second indicating member along the second direction.

[0009] According to some embodiments of the present invention, the first indicator is rotatably connected to the first rack so as to rotate around the second direction, and the second indicator is rotatably connected to the second rack so as to rotate around the second direction.

[0010] According to some embodiments of the present invention, the further comprising: a first lifting assembly, the stop member comprising a fixing portion and a stopping portion, the stopping portion being opposite to the extrusion member and spaced apart, the fixing portion being fixedly arranged on a side of the stopping portion away from the extrusion member, the stopping portion being transmission-connected to the first lifting assembly, the first lifting assembly being used for driving the stopping portion to move in a second direction, the stopping member being able to slide in the first direction relative to the first lifting assembly, the second direction being perpendicular to the first direction.

[0011] According to some embodiments of the present invention, a first pressure sensor is provided on a side of the stopper portion facing the fixing portion.

[0012] According to some embodiments of the present invention, the present invention further includes: an extrusion driving member, wherein the extrusion driving member is transmission-connected to a side of the extrusion member away from the stop member.

[0013] According to some embodiments of the present invention, the extrusion member includes a first extrusion portion and a second extrusion portion, the first extrusion portion is arranged opposite to the stop member, the second extrusion portion is used to face the shearing portion, the first extrusion portion is provided with a second pressure sensor arranged along the first direction, and the second extrusion portion is provided with a third pressure sensor arranged along the first direction.

[0014] According to some embodiments of the present invention, the extrusion member is provided with a plurality of pressure sensors in sequence along the second direction, some of the pressure sensors located within the projection area of ​​the stop surface along the first direction are the second pressure sensors, and another part of the pressure sensors are third pressure sensors.

[0015] Additional aspects and advantages of the present invention 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 invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic structural diagram of a concrete elastic modulus testing device according to an embodiment of the present invention; Figure 2 A schematic top view of a concrete elastic modulus testing device according to an embodiment of the present invention; Figure 3 A schematic side view of a concrete elastic modulus testing device according to an embodiment of the present invention; Figure 4 A cross-sectional schematic diagram of a concrete elastic modulus testing device according to an embodiment of the present invention; Figure 5 for Figure 4 A partial enlarged schematic diagram of part A; Figure 6 It is a structural schematic diagram of a height indicating assembly of a concrete elastic modulus testing device according to an embodiment of the present invention indicating the height of a stopper; Figure 7 The figure is a schematic structural diagram of a concrete elastic modulus testing device according to an embodiment of the present invention when a test piece is being extruded.

[0017] Figure Number: Abutment 100; Stopper 200; fixing portion 210; stopper portion 220; Extrusion 300; 400 pieces to be tested; Height indicating assembly 500; first indicating member 510; second indicating member 520; first gear 530; second gear 540; third gear 550; first rack 560; second rack 570; The first lifting assembly 600 . DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, "a number" refers to one or more than one, and "a plurality" refers to two or more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] Reference Figures 1 to 7As shown, a concrete elastic modulus testing device according to an embodiment of the present invention comprises: a base 100, a stopper 200, an extrusion member 300, a first strain detection member and a second strain detection member, wherein the stopper 200 is arranged on the base 100 and has a stopper surface; the extrusion member 300 is arranged on the base 100 and has an extrusion surface, wherein the extrusion surface and the stopper surface are opposite to and spaced apart from each other along a first direction, and an extrusion cavity for extruding a test piece 400 is formed between the extrusion surface and the stopper surface, wherein the extrusion surface is used to extrude one end surface of the test piece 400 along the first direction, and the stopper surface is used to stop a portion of the other end surface of the test piece 400 along the first direction, and the stopper surface passes through a three-dimensional projection area of ​​the test piece 400 along the first direction to form an extrusion portion, and the remaining portion forms a shear portion; the first strain detection member is used to adhere to the outer peripheral surface of the test piece 400 at the extrusion portion along the first direction; and the second strain detection member is used to adhere to the outer peripheral surface of the test piece 400 at the shear portion along the first direction. The concrete elastic modulus testing device in this embodiment can detect the elastic modulus and shear resistance of the test piece 400 by simultaneously detecting the compression and shear sections of the test piece 400, which greatly improves the detection efficiency, reduces the need for testing samples, and saves costs.

[0023] In this embodiment, the base 100 is rectangular and includes a frame and a table body. The frame is supported on the table body in a vertical direction, and the surface of the table body is a table top for placing the stopper 200 .

[0024] The stopper 200 is disposed on one side of the platform along the first direction, and can be lifted and lowered relative to the platform to accommodate different sizes of the test pieces 400, so that the stopper 200 always stops the portion 220 of the test piece 400, for example, the stopper 200 stops a portion of one side of a rectangular concrete column, wherein the stopper 200 is a rectangular block, and one side of the rectangular block stops at one side of the rectangular concrete column. As another embodiment, the platform 100 may also be provided with a through hole, and the stopper 200 may be disposed below the platform and fixed on the frame, and can also be lifted and lowered relative to the platform from the through hole.

[0025] The extrusion member 300 is arranged on the table top and moves relative to the stopper 200 along the first direction. The table top is provided with a guide groove, and a slide rail along the first direction is arranged in the guide groove. The bottom surface of the extrusion member 300 is slidably connected to the slide rail through a slider, and the bottom surface of the extrusion member 300 is in contact with the table top to move along the first direction. The extrusion member 300 and the stopper 200 are arranged relative to each other along the first direction, and an extrusion cavity is formed therebetween. When the rectangular concrete column is placed in the extrusion cavity of the table top, it will be extruded by the extrusion member 300 and the stopper 200 along the first direction. The vertical height of the top surface of the extrusion member 300 relative to the table top is greater than the vertical height of the top surface of the stopper 200 relative to the table top. By adjusting the height of the stopper 200, the stopper 200 stops a part of one side of the rectangular concrete column, so as to shear and extrude the concrete column at the same time.

[0026] The first strain detection member and the second strain detection member are both strain gauges. They can be the same type of strain gauges or different types of strain gauges. The strain gauge is an electrical device used to measure "strain" and undergoes a small mechanical change under the action of an external force. In this embodiment, the strain gauge is bonded to the surface of a rectangular concrete column. The specific working principle of the strain gauge is: when the strain gauge detects deformation, the resistance in the strain gauge changes to form a bridge circuit, and the resistance change is converted into a voltage change, and the voltage change is amplified and processed, and finally read by the controller and displayed on the display. The controller is electrically connected to the first strain detection member and the second strain detection member, and the display is electrically connected to the controller.

[0027] It is worth understanding that, by stopping part 200, part of the test piece 400 is stopped. When the test piece 400 is squeezed by the extrusion piece 300, the shearing part of the test piece 400 will move along the first direction relative to the extrusion part, and the shearing part is subjected to shearing, while the extrusion part is squeezed along the first direction by the stopper 200 and the extrusion piece 300, and the extrusion part is subjected to elastic compression. The first strain detection part is arranged at the extrusion part to detect the strain amount caused by the compression of the test piece 400, and then calculate the elastic modulus. The second strain detection part is arranged at the shearing part to detect the shear strength of the test piece 400, so as to realize the detection of multiple performances of the test piece 400 in the same test process, thereby improving the detection efficiency.

[0028] Reference Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the concrete elastic modulus testing device further includes: a height indicating assembly 500, the height indicating assembly 500 includes a first indicator 510 and a second indicator 520, the first indicator 510 is used to indicate a first height L1 of the stopper 200 relative to the base 100 along the second direction, the second indicator 520 is used to indicate a second height L2 of the test piece 400 relative to the base 100 along the second direction, the second direction is perpendicular to the first direction, and the concrete elastic modulus testing device satisfies: L2=L1*N.

[0029] It is worth understanding that by controlling the height of the first indicator 510 to form a reference for the rising height of the stopper 200, the stopper 200 can always move to a suitable position to stop one side of the test piece 400 according to the size of the test piece 400. For example, when N=2, L2=2*L1, that is, the top surface of the stopper 200 is located at the middle position of one side of the test piece 400 along the second direction, and the boundary line of the shearing part and the extrusion part along the second direction divides the test piece 400 into two; and when N=3, L2=3*L1, that is, the top surface of the stopper 200 is located at one-third of the one side of the test piece 400 along the second direction. By controlling the height of the second indicator 520 to form a height reference for the first indicator 510, and the second indicator 520 directly corresponds to the height of the test piece 400, the first indicator 510 has a higher position accuracy when the second indicator 520 is used as a reference.

[0030] Reference Figure 4 , Figure 5 and Figure 6 As shown, in some specific embodiments of the present invention, the height indicating assembly 500 further includes a first gear 530, a second gear 540, a third gear 550 and a first driving member transmission-connected to the first gear 530, the first gear 530 is meshed with the second gear 540, the transmission ratio of the first gear 530 and the second gear 540 is N1, the second gear 540 is transmission-connected to the first indicating member 510, the third gear 550 is coaxially connected to the first gear 530, the transmission ratio of the first gear 530 and the third gear 550 is N2, the third gear 550 is transmission-connected to the second indicating member 520, and the height indicating assembly 500 satisfies: L2=L1*N1 / N2.

[0031] It is worth understanding that the heights of the first indicator 510 and the second indicator 520 are controlled by the transmission ratio of the first gear 530 and the second gear 540, so that the ratio between the first indicator 510 and the second indicator 520 is fixed, and the transmission ratio of the gears is fixed, so that the relative height adjustment accuracy of the first indicator 510 and the second indicator 520 is higher.

[0032] Specifically, after the device under test 400 is placed on the table of the base 100, the bottom surface of the second indicator 520 is moved to be flush with the top surface of the device under test 400, so that the position of the first indicator 510 is located at a predetermined position. For example, when N1 / N2=N=2, the top surface of the second indicator 520 is moved to be flush with the top surface of the device under test 400. At this time, the height of the first indicator 510 is half of the height of the second indicator 520, that is, the position of the first indicator 510 is the middle position of the device under test 400 along the second direction. The height of the second indicator 520 is pre-adjusted so that the height of the second indicator 520 is higher than the height of the device under test 400 along the second direction, so that the device under test 400 is placed directly below the second indicator 520, and then the second indicator 520 is lowered to the top surface of the device under test 400.

[0033] In addition, although the first driving member is not shown in the figure, an installation position for the first driving member is reserved in the figure. The first driving member is connected to the side of the first gear 530 away from the second gear 540, and it can be fixed on the ground or hoisted in the space under the platform.

[0034] Reference Figure 4 , Figure 5 and Figure 6 As shown, in some specific embodiments of the present invention, the height indicating assembly 500 also includes a first rack 560 and a second rack 570, the first rack 560 is connected to the second gear 540 and the first indicator 510 along the second direction, and the second gear 540 is connected to the third gear 550 and the second indicator 520 along the second direction.

[0035] It is worth understanding that the rotation of the gear is converted into reciprocating motion along the second direction by the first rack 560 and the second rack 570, so that the first indicator 510 and the second indicator 520 can be lifted and lowered along the second direction.

[0036] In this embodiment, the first gear 530, the second gear 540 and the third gear 550, and the motor transmission-connected to the first gear 530 are all arranged in the frame, or the first gear 530 is manually rotated by a hand-cranked handle, and the hand-cranked handle extends out of the frame, the first rack 560 is guided along the second direction to connect to the frame, the first rack 560 is connected to the frame through a guide rail, and the guide rail is completely located in the frame, the second rack 570 is guided along the second direction to connect to the frame, and the second rack 570 is also connected to the frame through a guide rail, and the guide rail is completely located in the frame.

[0037] Reference Figure 6 As shown, in some specific embodiments of the present invention, the first indicator 510 is rotatably connected to the first rack 560 to rotate around the second direction, and the second indicator 520 is rotatably connected to the second rack 570 to rotate around the second direction.

[0038] In this embodiment, the first indicator 510 can be moved to the top of the stopper 200 by rotation, and the second indicator 520 can be moved to the top of the workpiece 400 by rotation, so as to accurately locate the position of the stopper 200. After the position of the stopper 200 is determined, the workpiece 400 to be tested may expand due to pressure, which will affect the second indicator 520. Since the first indicator 510 is located on the moving path of the sheared portion of the workpiece 400 to be tested, there is also a risk of damage to the first indicator 510. 0 rotates around the first rack 560, so that the first indicator 510 rotates to the outside of the stopper 200, and is not located in the space directly above the stopper 200. Similarly, the second indicator 520 rotates around the second rack 570, so that the second indicator 520 rotates to the outside of the test piece 400, and is not located in the space directly above the test piece 400. When the test piece 400 is tested, it is not easy to have adverse effects on the first indicator 510 and the second indicator 520, thereby reducing the risk of damage to the first indicator 510 and the second indicator 520.

[0039] Specifically, the first rack 560 includes a first tooth portion and a first rotating portion connected to the top end of the first tooth portion along the second direction, the first rotating portion is rotationally connected to the first indicator 510 , and the first tooth portion is meshingly connected to the second gear 540 .

[0040] Reference Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, in some specific embodiments of the present invention, the concrete elastic modulus testing device also includes: a first lifting assembly 600, the stopper 200 includes a fixing portion 210 and a stopping portion 220, the stopping portion 220 is opposite to the extrusion member 300 and is arranged at an interval, the fixing portion 210 is fixedly arranged on a side of the stopping portion 220 away from the extrusion member 300, the stopping portion 220 is transmission-connected to the first lifting assembly 600, the first lifting assembly 600 is used to drive the stopping portion 220 to move along the second direction, the stopping portion 200 can slide relative to the first lifting assembly 600 along the first direction, and the second direction is perpendicular to the first direction.

[0041] It is worth understanding that the stopper 220 is lifted and lowered by the first lifting assembly 600 so as to distinguish the shearing part and the extrusion part at the same ratio position of the test piece 400 of different sizes, thereby improving the detection accuracy. When the test piece 400 is pushed by the extrusion piece 300 and abuts against the stopper 220, the stopper 220 is subjected to a force along the first direction. In order to prevent the stopper 220 from driving the first lifting assembly 600 to bend along the first direction and causing damage to the first lifting assembly 600, the stopper 220 is slidably arranged along the first direction with the first lifting assembly 600, and the first lifting assembly 600 is stopped along the first direction by the fixing part 210, so that the stopper 220 and the extrusion piece 300 can extrude the test piece 400 together. The first lifting assembly 600 is also not easily subjected to a force along the first direction, and is not easily bent or damaged, thereby improving the service life and reliability of use.

[0042] In some specific embodiments of the present invention, a first pressure sensor is disposed on a surface of the stopper 220 facing the fixing portion 210 .

[0043] It is worth understanding that the actual pressure exerted on the stop portion 220 detected by the first pressure sensor, that is, the pressure actually applied by the stop portion 220 to the test piece 400, is also the actual pressure exerted on the test piece 400. When simulating and calculating with the first pressure value detected by the first pressure sensor, the first pressure value is closer to the actual pressure value exerted on the test piece 400, the data is more accurate, and the detection accuracy is higher.

[0044] Reference Figure 7 As shown, in some embodiments of the present invention, the concrete elastic modulus testing device further includes: an extrusion driving member, which is transmission-connected to a side of the extrusion member 300 away from the stopper 200. The extrusion member 300 includes a first extrusion portion and a second extrusion portion, the first extrusion portion is arranged opposite to the stopper 200, the second extrusion portion is used to face the shearing portion, the first extrusion portion is provided with a second pressure sensor arranged along the first direction, and the second extrusion portion is provided with a third pressure sensor arranged along the first direction.

[0045] It is worth understanding that the second pressure sensor and the third pressure sensor are used to detect the pressures exerted on the extrusion part and the shear part respectively. When the concrete slides along the first direction due to shearing, the values ​​of the second pressure sensor and the third pressure sensor are not the same, so the structural strength of the concrete under extrusion and shearing can be detected more accurately, and the detection accuracy is higher.

[0046] In some specific embodiments of the present invention, the extrusion member 300 is sequentially provided with a plurality of pressure sensors along the second direction, some of the pressure sensors located in the projection area of ​​the stop surface along the first direction are second pressure sensors, and the other part of the pressure sensors are third pressure sensors.

[0047] It is worth understanding that by providing multiple pressure sensors to accommodate different sizes of the test piece 400 , the second pressure sensor can detect the pressure of the extrusion part, and the third pressure sensor can detect the pressure of the shearing part, thereby improving the detection accuracy.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A concrete elastic modulus testing device, characterized in that: include: abutment; A stopper, disposed on the base and having a stopper surface; An extrusion piece is provided on the base and has an extrusion surface. Along the first direction, the extrusion surface and the stop surface are opposite and spaced from each other. An extrusion cavity for extruding the workpiece to be tested is formed between the extrusion surface and the stop surface. The extrusion surface is used to extrude one end surface of the workpiece to be tested along the first direction. The stop surface is used to stop a portion of the other end surface of the workpiece to be tested along the first direction. The stop surface passes through a three-dimensional projection area of ​​the workpiece to be tested along the first direction to form an extrusion portion, and the remaining portion forms a shearing portion. A first strain detection member, used to be attached to the outer peripheral surface of the extrusion portion of the test piece along the first direction; The second strain detection member is used to adhere to the outer peripheral surface of the shearing portion of the test piece along the first direction.

2. The concrete elastic modulus testing device according to claim 1, characterized in that: Also includes: A height indicating assembly, the height indicating assembly comprising a first indicating member and a second indicating member, the first indicating member being used to indicate a first height L1 of the stop member relative to the base along a second direction, the second indicating member being used to indicate a second height L2 of the test piece relative to the base along the second direction, the second direction being perpendicular to the first direction, and the concrete elastic modulus testing device satisfying: L2=L1*N.

3. The concrete elastic modulus testing device according to claim 2, characterized in that: The height indicating assembly also includes a first gear, a second gear, a third gear and a first driving member transmission-connected to the first gear, the first gear is meshed with the second gear, the transmission ratio between the first gear and the second gear is N1, the second gear is transmission-connected to the first indicating member, the third gear is coaxially connected to the first gear, the transmission ratio between the first gear and the third gear is N2, the third gear is transmission-connected to the second indicating member, and the height indicating assembly satisfies: L2=L1*N1 / N2.

4. The concrete elastic modulus testing device according to claim 3, characterized in that: The height indicating assembly further includes a first rack and a second rack, wherein the first rack is transmission-connected to the second gear and the first indicating member along the second direction, and the second gear is transmission-connected to the third gear and the second indicating member along the second direction.

5. The concrete elastic modulus testing device according to claim 4, characterized in that: The first indicator is rotatably connected to the first rack so as to rotate around the second direction, and the second indicator is rotatably connected to the second rack so as to rotate around the second direction.

6. The concrete elastic modulus testing device according to claim 1, characterized in that: Also includes: The first lifting assembly, the stopper comprises a fixing portion and a stopping portion, the stopping portion is opposite to the extrusion member and is spaced apart, the fixing portion is fixedly arranged on a side of the stopping portion away from the extrusion member, the stopping portion is transmission-connected with the first lifting assembly, the first lifting assembly is used for driving the stopping portion to move along a second direction, the stopping member can slide along the first direction relative to the first lifting assembly, and the second direction is perpendicular to the first direction.

7. The concrete elastic modulus testing device according to claim 6, characterized in that: A first pressure sensor is disposed on a side of the stopper portion facing the fixing portion.

8. The concrete elastic modulus testing device according to claim 1, characterized in that: Also includes: An extrusion driving member is transmission-connected to a side of the extrusion member away from the stop member.

9. The concrete elastic modulus testing device according to claim 1, characterized in that: The extrusion member includes a first extrusion portion and a second extrusion portion, the first extrusion portion is arranged opposite to the stop member, the second extrusion portion is used to face the shearing portion, the first extrusion portion is provided with a second pressure sensor arranged along the first direction, and the second extrusion portion is provided with a third pressure sensor arranged along the first direction.

10. The concrete elastic modulus testing device according to claim 9, characterized in that: Along the second direction, the extrusion member is sequentially provided with a plurality of pressure sensors, some of the pressure sensors located within the projection area of ​​the stop surface along the first direction are the second pressure sensors, and the other part of the pressure sensors are the third pressure sensors.

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