Device for testing adhesive property of cement paste and aggregate

Abstract

The utility model relates to the technical field of indoor tensile tests, and discloses a cement paste and aggregate bonding performance testing device which comprises an adjustable cement paste grouting sleeve and two sets of aggregate test piece fixing mechanisms, the adjustable cement paste grouting sleeve comprises a telescopic sleeve, an adjusting assembly and two connecting end rings, the two connecting end rings are connected to the two ends of the telescopic sleeve correspondingly and detachably connected with the two aggregate test piece fixing mechanisms correspondingly, the adjusting assembly is connected between the two connecting end rings and used for adjusting the length of the telescopic sleeve, a grouting hole is formed in the side wall of the telescopic sleeve, and the two connecting end rings are detachably connected with the two aggregate test piece fixing mechanisms correspondingly. A control valve used for controlling opening and closing of the grouting hole is arranged on the side wall of the telescopic sleeve. The device can relieve the problem that the bonding performance of the cement paste and the aggregate is inconvenient to test.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of indoor tensile test, especially to a cement paste and aggregate adhesion performance testing device. BACKGROUND

[0002] The water permeable cement concrete refers to the concrete with the void ratio of 15-25%, also called sandless concrete. With the increasing attention on improving ecological environment and protecting homeland, the water permeable cement concrete is being applied more and more. In the manufacturing process of the water permeable cement concrete, various pores need to be generated, so generally the aggregate with the particularly small particle size does not need to be added, and the water permeable cement concrete can be regarded as the aggregate wrapped by the cementitious material, which is bonded together after hardening to form the structure with various pores and certain strength.

[0003] The internal structure of the water permeable cement concrete mainly consists of two parts, one is the aggregate, and the other is the cement paste. Through a large number of studies on the structural damage characteristics of the water permeable cement concrete, it is found that the strength of the aggregate is much greater than that of the cement paste, and for the water permeable cement concrete under the stress state, the cement paste is the most easily damaged place, so the test specimen needs to be made for testing.

[0004] At present, the manufacturing process of the test specimen is mostly performed by hand extrusion, but this manufacturing method has two deficiencies, one is that the two aggregate test specimens are connected by the hand extrusion of the cement paste, the thickness of the cement paste cannot be accurately controlled by this connecting method, and the spacer is contained in the middle of the aggregate test specimen, which will have a certain influence on the test data; the other is that when the test specimen is stretched, the stretching metal rod needs to be connected with the aggregate test specimen by the epoxy resin glue, this connecting method is not only cumbersome, but also the metal rod is easy to be not in the center position when being positioned and pasted, which influences the test data, and the connection by the glue will produce a certain buffer and be easy to be pulled off, so that the experimental results have large deviation.

[0005] According to the related art, the inventors believe that the cement paste and aggregate adhesion performance testing is inconvenient. CONTENT OF THE UTILITY MODEL

[0006] In order to alleviate the problem of the cement paste and aggregate adhesion performance testing, the utility model provides a cement paste and aggregate adhesion performance testing device.

[0007] The utility model discloses a cement paste and aggregate adhesion performance testing device adopts the following technical scheme:

[0008] The utility model provides a cement paste and aggregate bonding performance testing device, including adjustable cement paste grouting sleeve and two groups of aggregate test piece fixing mechanism, the adjustable cement paste grouting sleeve includes telescopic sleeve, adjusting assembly and two connecting end rings, two connecting end rings are connected at the both ends of telescopic sleeve respectively, two connecting end rings are detachably connected with two groups of aggregate test piece fixing mechanism respectively, adjusting assembly is connected between two connecting end rings, adjusting assembly is used for adjusting the length of telescopic sleeve, the side wall of telescopic sleeve is provided with grouting hole, and the side wall of telescomatic sleeve is provided with control valve for controlling the opening and closing of grouting hole.

[0009] Through the above technical scheme, the aggregate test piece fixing mechanism is used to fix the aggregate test piece to be tested, the side of the aggregate test piece in contact with the cement paste is polished by a diamond grinding disc with the required mesh number before the aggregate test piece is loaded into the aggregate test piece fixing mechanism, oil is brushed on the inner side of the telescopic sleeve and the two connecting end rings, the length of the telescopic sleeve is adjusted by the adjusting assembly according to the thickness of the cement paste layer required by the test, after the adjustment is completed, the two connecting end rings are connected with the two groups of aggregate test piece fixing mechanism respectively, cement paste is injected into the telescopic sleeve through the grouting hole, the control valve is closed after the telescopic sleeve is filled with cement paste, and after the cement paste is solidified, the adjustable cement paste grouting sleeve is separated from the two groups of aggregate test piece fixing mechanism, the entire test piece and the aggregate test piece fixing mechanism are cured at the same time, and the test piece is tested by the two groups of aggregate test piece fixing mechanism after the curing is completed. The adjustable cement paste grouting sleeve can flexibly adjust the length of the telescopic sleeve, accurately simulate the grouting layer with different thicknesses according to actual needs, accurately obtain the data of the test piece by accurately controlling the thickness of the cement paste, and speed up the test speed and improve the test efficiency.

[0010] Optionally, the grouting hole is provided with two, one of which is located on the side of the telescopic sleeve away from the ground, and the other is located on the side of the telescopic sleeve close to the ground.

[0011] Through the above technical scheme, the grouting hole is provided on the side of the telescopic sleeve close to the ground and the side of the telescopic sleeve away from the ground, cement paste is injected into the telescopic sleeve through the grouting hole on the side of the telescopic sleeve close to the ground when the cement paste is injected into the telescopic sleeve, the injection of cement paste is stopped when the grouting hole on the side of the telescopic sleeve away from the ground has cement paste overflowing, and the two control valves are closed, so that the cement paste in the telescopic sleeve is more uniform, and the accuracy of the test result is improved.

[0012] Optionally, the telescopic sleeve includes two first half cylinders, the telescopic sleeve is spliced by the two first half cylinders, the connecting end ring includes two half rings, the connecting end ring is spliced by the two half rings, the two half rings of the connecting end ring are detachably connected, and the two half rings are fixedly connected with the two first half cylinders respectively.

[0013] By adopting the technical scheme, the telescopic sleeve is formed by splicing two first half cylinders, the two ends of each first half cylinder are fixedly connected with a half ring body, when the two first half cylinders are spliced together, the two half ring bodies at the same end of the two first half cylinders are spliced into a connecting end ring, the two first half cylinders are fixed by the cooperation of the two half ring bodies, after the cement mortar grouting is completed and the cement mortar is solidified, the connecting end ring is separated from the aggregate specimen fixing mechanism, and then the two half ring bodies are separated, so that the telescopic sleeve is disassembled into two first half cylinders and then removed from the specimen, and subsequent maintenance of the specimen is facilitated.

[0014] Optionally, the aggregate specimen fixing mechanism comprises a splicing sleeve, a stretching rod and a positioning assembly, the splicing sleeve is a hollow cylinder mechanism, a communication port is formed at one end of the splicing sleeve, the connecting end ring is detachably connected with the end of the splicing sleeve where the communication port is formed, the splicing sleeve is formed by splicing two second half cylinders, the stretching rod is fixedly connected to the end of the splicing sleeve away from the communication port, and the positioning assembly is connected with the splicing sleeve and used for clamping and positioning the aggregate specimen.

[0015] By adopting the technical scheme, the positioning assembly is arranged on the splicing sleeve, the aggregate specimen is placed into the splicing sleeve from the end of the splicing sleeve where the communication port is formed, the aggregate specimen is fixed at the middle position of the splicing sleeve by the positioning assembly, and the aggregate specimen fixing mechanism and the aggregate specimen are integrally maintained and stretched, so that the force during stretching is ensured to be at the center position of the specimen, the data accuracy is ensured, the fixing mode of the stretching rod is simplified, and the stretching rod is safer and more stable.

[0016] Optionally, the positioning assembly is provided with two groups, the two groups of positioning assemblies are arranged on the two second half cylinders respectively, the positioning assembly comprises an adjusting bolt and an arc-shaped pressing plate, the adjusting bolt is arranged on the second half cylinder and is threadedly connected with the second half cylinder, the rotation axis of the adjusting bolt is perpendicular to the axis of the splicing sleeve, the arc-shaped pressing plate is located in the splicing sleeve, and the arc-shaped pressing plate is rotationally connected with the adjusting bolt.

[0017] By adopting the technical scheme, the position of the arc-shaped pressing plate is adjusted by rotating the adjusting bolt, and the two arc-shaped pressing plates are moved towards the aggregate specimen by rotating the two adjusting bolts, so that the aggregate specimen is clamped and fixed.

[0018] Optionally, the adjusting assembly comprises a motor, a screw rod, a nut and two first connecting ears, the two first connecting ears are fixedly connected with two connecting end rings respectively, the screw rod is arranged between the two first connecting ears, the nut is fixedly connected to one side of one of the first connecting ears away from the other first connecting ear, the screw rod is threadedly connected with the nut, the motor is fixedly connected to the other first connecting ear, the screw rod is rotationally connected with the first connecting ear fixedly connected with the motor, and the output shaft of the motor is in transmission connection with the screw rod.

[0019] By adopting the above technical scheme, the motor drives the screw rod rotationally connected to one of the first connecting ears to rotate, the screw rod is threadedly connected with the nut fixedly connected to the other first connecting ear, and the nut moves along the length direction of the screw rod during the rotation of the screw rod, so that the distance between the two first connecting ears is adjusted.

[0020] Optionally, a guide assembly is arranged between the two connecting end rings, the guide assembly comprises a guide rod and two second connecting ears, the two second connecting ears are fixedly connected with the two connecting end rings respectively, and the guide rod is slidingly connected between the two second connecting ears.

[0021] By adopting the above technical scheme, the guide assembly is arranged between the two connecting end rings, the movement of the two connecting end rings is limited by the guide assembly, the stability of the adjusting assembly in adjusting the distance between the two connecting end rings is improved, in addition, the first connecting ear and the second connecting ear are fixedly connected to the two half ring bodies of the connecting end ring respectively, and the arrangement of the adjusting assembly does not affect the disassembly of the telescopic sleeve.

[0022] Optionally, a gasket is arranged at the connection between the two second half cylinders.

[0023] By adopting the above technical scheme, the gasket is arranged at the connection between the two second half cylinders, and the sealing performance of the spliced sleeve is improved.

[0024] In summary, the utility model has at least one of the following beneficial technical effects:

[0025] 1. The utility model discloses a cement mortar grouting test device, which comprises a first connecting ear, a second connecting ear, a telescopic sleeve, a first connecting ring and a second connecting ring, wherein the first connecting ear and the second connecting ear are fixedly connected to the two half ring bodies of the connecting ring respectively, the telescopic sleeve is sleeved on the connecting ring, and the first connecting ring and the second connecting ring are connected to the two groups of aggregate test piece fixing mechanisms respectively.

[0026] 2. The utility model discloses a gasket is set to the connection of two second half cylinders, improves the airtightness of splicing sleeve.

[0027] 3. The utility model discloses a guide assembly is set between the two connecting rings, and the movement of the two connecting rings is limited by the guide assembly, the stability of the distance adjustment between the two connecting rings by the adjusting assembly is improved, in addition, the first connecting ear and the second connecting ear are fixedly connected to the two half ring bodies of the connecting ring respectively, and the setting of the adjusting assembly does not affect the disassembly of the telescopic sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. The illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0029] Figure 1 It is the overall structure schematic diagram of the utility model embodiment;

[0030] Figure 2 It is the structure schematic diagram of telescopic sleeve part in the utility model embodiment;

[0031] Figure 3 It is the structure schematic diagram of positioning assembly part in the utility model embodiment.

[0032] 100, adjustable cement paste grouting sleeve; 200, telescopic sleeve; 210, grouting hole; 220, first half cylinder; 300, adjusting assembly; 310, screw rod; 320, nut; 330, first connecting lug; 400, connecting end ring; 410, half ring body; 500, guiding assembly; 510, guiding rod; 520, second connecting lug; 600, aggregate specimen fixing mechanism; 700, splicing sleeve; 710, second half cylinder; 800, stretching rod; 900, positioning assembly; 910, adjusting bolt; 920, arc-shaped pressing plate. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the overall concept of the present application, the following will be combined with the accompanying drawings to further describe the present application. Figures 1-3 The present application will be further described in detail.

[0034] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment can be combined with each other without conflict.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The present application discloses a cement paste and aggregate adhesion performance testing device. Referring to Figure 1 A cement paste and aggregate adhesion performance testing device comprises an adjustable cement paste grouting sleeve 100 and two groups of aggregate specimen fixing mechanisms 600. The adjustable cement paste grouting sleeve 100 comprises a telescopic sleeve 200, an adjusting assembly 300 and two connecting end rings 400, the two connecting end rings 400 are respectively mounted at both ends of the telescopic sleeve 200, and the two connecting end rings 400 are respectively detachably connected with the two groups of aggregate specimen fixing mechanisms 600. The adjusting assembly 300 is connected between the two connecting end rings 400, and the adjusting assembly 300 is used for adjusting the length of the telescopic sleeve 200. The side wall of the telescopic sleeve 200 is provided with a grouting hole 210, and the side wall of the telescopic sleeve 200 is provided with a control valve for controlling the opening and closing of the grouting hole 210.

[0037] Before the aggregate test piece is loaded into the aggregate test piece fixing mechanism 600, the side of the aggregate test piece in contact with the cement paste is polished with a diamond grinding disc of the required test mesh size, the inside of the telescopic sleeve 200 and the two connecting end rings 400 are brushed with oil, the length of the telescopic sleeve 200 is adjusted according to the thickness of the cement paste layer required for the test using the adjusting assembly 300, after the adjustment is completed, the two connecting end rings 400 are respectively connected with the two sets of aggregate test piece fixing mechanisms 600, the cement paste is poured into the telescopic sleeve 200 through the grouting hole 210, when the telescopic sleeve 200 is filled with cement paste, the control valve is closed, after the cement paste is solidified, the adjustable cement paste grouting sleeve 100 is separated from the two sets of aggregate test piece fixing mechanisms 600, the entire test piece and the aggregate test piece fixing mechanism 600 are cured at the same time, after the curing is completed, the test piece is tested by the two sets of aggregate test piece fixing mechanisms 600, the adjustable cement paste grouting sleeve 100 can flexibly adjust the length of the telescopic sleeve 200, according to the actual needs, the grouting layer of different thicknesses can be accurately simulated, by accurately controlling the thickness of the cement paste, the data of the test piece can be accurately obtained and the test speed can be accelerated, and the test efficiency can be improved.

[0038] With reference to Figure 1 , the grouting hole 210 is provided with two, one of which is located on the side of the telescopic sleeve 200 away from the ground, and the other is located on the side of the telescopic sleeve 200 close to the ground. When pouring cement paste into the telescopic sleeve 200, cement paste is poured into the telescopic sleeve 200 through the grouting hole 210 located on the side of the telescopic sleeve 200 close to the ground, when the grouting hole 210 located on the side of the telescopic sleeve 200 away from the ground has cement paste overflowing, the pouring of cement paste is stopped, and the two control valves are closed, so that the cement paste in the telescopic sleeve 200 is more uniform, and the accuracy of the test result is improved.

[0039] With reference to Figure 1 and Figure 2 The telescopic sleeve 200 includes two first half cylinders 220, and the telescopic sleeve 200 is spliced by the two first half cylinders 220. The connecting end ring 400 includes two half ring bodies 410, and the connecting end ring 400 is spliced by the two half ring bodies 410. The two half ring bodies 410 of the connecting end ring 400 are detachably connected, and the two half ring bodies 410 are fixedly connected with the two first half cylinders 220, respectively.

[0040] When the two first half cylinders 220 are spliced together, the two half ring bodies 410 at the same end of the two first half cylinders 220 are spliced into the connecting end ring 400, and the two first half cylinders 220 are fixed by cooperation of the two half ring bodies 410. After the cement slurry grouting is completed and it is solidified, the connecting end ring 400 is separated from the aggregate test specimen fixing mechanism 600, and then the two half ring bodies 410 are separated, so that the telescopic sleeve 200 is disassembled into two first half cylinders 220 and then removed from the test specimen, facilitating subsequent maintenance of the test specimen.

[0041] With reference to Figure 1 and Figure 2 , the adjusting assembly 300 includes a motor, a screw rod 310, a nut 320, and two first connecting ears 330. The two first connecting ears 330 are fixedly connected with the two connecting end rings 400 respectively. The screw rod 310 is arranged between the two first connecting ears 330, the nut 320 is fixedly connected to one side of one of the first connecting ears 330 away from the other first connecting ear 330, and the screw rod 310 is threadedly connected with the nut 320. The motor is fixedly connected to the other first connecting ear 330, the screw rod 310 is rotationally connected with the first connecting ear 330 fixedly connected with the motor, and the output shaft of the motor is drivingly connected with the screw rod 310.

[0042] The screw rod 310 rotationally connected to one of the first connecting ears 330 is driven to rotate by the motor. The nut 320 is threadedly connected to the screw rod 310, and the nut 320 is fixedly connected to the other first connecting ear 330. During the rotation of the screw rod 310, the nut 320 moves along the length direction of the screw rod 310, so as to adjust the distance between the two first connecting ears 330.

[0043] With reference to Figure 1 and Figure 2 , a guide assembly 500 is arranged between the two connecting end rings 400. The guide assembly 500 includes a guide rod 510 and two second connecting ears 520. The two second connecting ears 520 are fixedly connected with the two connecting end rings 400 respectively, and the guide rod 510 is slidingly connected between the two second connecting ears 520. The first connecting ears 330 and the second connecting ears 520 are fixedly connected to the two half ring bodies 410 of the connecting end ring 400 respectively.

[0044] By arranging the guide assembly 500 between the two connecting end rings 400, the movement of the two connecting end rings 400 is limited by the guide assembly 500, so as to improve the stability of the adjusting assembly 300 in adjusting the distance between the two connecting end rings 400. In addition, the first connecting ears 330 and the second connecting ears 520 are fixedly connected to the two half ring bodies 410 of the connecting end ring 400 respectively, so that the arrangement of the adjusting assembly 300 does not affect the disassembly of the telescopic sleeve 200.

[0045] With reference toFigure 1 and Figure 3 The aggregate test piece fixing mechanism 600 comprises a splicing sleeve 700, a stretching rod 800 and a positioning assembly 900. The splicing sleeve 700 is a hollow cylinder mechanism, and a communicating opening is formed at one end of the splicing sleeve 700. The connecting end ring 400 is detachably connected to the end of the splicing sleeve 700 where the communicating opening is formed. The splicing sleeve 700 is spliced by two second half cylinders 710. The stretching rod 800 is fixedly connected to the end of the splicing sleeve 700 away from the communicating opening. The positioning assembly 900 is connected to the splicing sleeve 700, and is used for clamping and positioning the aggregate test piece.

[0046] With reference to Figure 1 and Figure 3 The positioning assembly 900 is provided in two groups, and the two groups of positioning assemblies 900 are arranged on the two second half cylinders 710, respectively. The positioning assembly 900 comprises an adjusting bolt 910 and an arc-shaped pressing plate 920. The adjusting bolt 910 is arranged on the second half cylinder 710 and is threadedly connected to the second half cylinder 710. The rotation axis of the adjusting bolt 910 is perpendicular to the axis of the splicing sleeve 700. The arc-shaped pressing plate 920 is located inside the splicing sleeve 700 and is rotationally connected to the adjusting bolt 910.

[0047] By arranging the positioning assembly 900 on the splicing sleeve 700, the aggregate test piece is placed into the splicing sleeve 700 from the end of the splicing sleeve 700 where the communicating opening is formed. The position of the arc-shaped pressing plate 920 is adjusted by rotating the adjusting bolt 910. At the same time, the two arc-shaped pressing plates 920 are moved towards the aggregate test piece by rotating the two adjusting bolts 910, so as to clamp and fix the aggregate test piece. The aggregate test piece is fixed at the middle position of the splicing sleeve 700 by using the positioning assembly 900. The aggregate test piece fixing mechanism 600 is integrally maintained and stretched with the aggregate test piece. The force during stretching can be ensured to be at the center position of the test piece, the data accuracy is ensured, and the fixing mode of the stretching rod 800 is simplified, so that the stretching rod 800 is safer and more stable.

[0048] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments mainly describes the differences from other embodiments.

[0049] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application. The unmentioned parts in the present application can be realized by using or referring to the existing technology.

Claims

1. A device for testing the bonding performance between cement slurry and aggregate, characterized in that: The utility model provides a cement grouting sleeve (100) and two groups of aggregate test piece fixing mechanism (600), the cement grouting sleeve (100) includes telescopic sleeve (200), adjusting assembly (300) and two connecting end rings (400), two connecting end rings (400) are connected respectively at both ends of telescopic sleeve (200), two connecting end rings (400) are detachably connected with two groups of aggregate test piece fixing mechanism (600), adjusting assembly (300) is connected between two connecting end rings (400), adjusting assembly (300) is used for adjusting the length of telescopic sleeve (200), the side wall of telescopic sleeve (200) is provided with grouting hole (210), the side wall of telescopic sleeve (200) is provided with control valve for controlling the opening and closing of grouting hole (210).

2. The device for testing the bonding performance between cement paste and aggregate according to claim 1, characterized in that: Two grouting holes (210) are provided, one of which is located on the side of the telescopic sleeve (200) away from the ground, and the other is located on the side of the telescopic sleeve (200) close to the ground.

3. The device for testing the bonding performance between cement paste and aggregate according to claim 1, characterized in that: The telescopic sleeve (200) includes two first half cylinders (220), and the telescopic sleeve (200) is formed by splicing the two first half cylinders (220). The connecting end ring (400) includes two half rings (410), and the connecting end ring (400) is formed by splicing the two half rings (410). The two half rings (410) of the connecting end ring (400) are detachably connected, and the two half rings (410) are fixedly connected with the two first half cylinders (220), respectively.

4. The device for testing the bonding performance between cement paste and aggregate according to claim 1, characterized in that: The aggregate test piece fixing mechanism (600) includes a splicing sleeve (700), a stretching rod (800), and a positioning assembly (900). The splicing sleeve (700) is a hollow cylindrical mechanism. One end of the splicing sleeve (700) is provided with a communication port. The connecting end ring (400) is detachably connected with the one end of the splicing sleeve (700) provided with the communication port. The splicing sleeve (700) is formed by splicing two second half cylinders (710). The stretching rod (800) is fixedly connected to the end of the splicing sleeve (700) away from the communication port. The positioning assembly (900) is connected with the splicing sleeve (700). The positioning assembly (900) is used for clamping and positioning the aggregate test piece.

5. The device for testing the bonding performance between cement paste and aggregate according to claim 4, characterized in that: The positioning assembly (900) is provided with two groups, and the two groups of positioning assemblies (900) are arranged on the two second half cylinders (710), respectively. The positioning assembly (900) includes an adjusting bolt (910) and an arc-shaped pressing plate (920). The adjusting bolt (910) is arranged on the second half cylinder (710) and is threadedly connected with the second half cylinder (710). The rotation axis of the adjusting bolt (910) is perpendicular to the axis of the splicing sleeve (700). The arc-shaped pressing plate (920) is located inside the splicing sleeve (700) and is rotatably connected with the adjusting bolt (910).

6. The device for testing the bonding performance between cement paste and aggregate according to claim 3, characterized in that: The adjusting assembly (300) comprises a motor, a screw rod (310), a nut (320) and two first connecting lugs (330), the two first connecting lugs (330) are fixedly connected with two connecting end rings (400) respectively, the screw rod (310) is arranged between the two first connecting lugs (330), the nut (320) is fixedly connected on one side of one of the first connecting lugs (330) away from the other first connecting lug (330), the screw rod (310) is threadedly connected with the nut (320), the motor is fixedly connected on the other first connecting lug (330), the screw rod (310) is rotatably connected with the first connecting lug (330) fixedly connected with the motor, and an output shaft of the motor is drivingly connected with the screw rod (310).

7. The device for testing the bonding performance between cement paste and aggregate according to claim 6, characterized in that: A guide assembly (500) is arranged between the two connecting end rings (400), the guide assembly (500) comprises a guide rod (510) and two second connecting lugs (520), the two second connecting lugs (520) are fixedly connected with the two connecting end rings (400) respectively, and the guide rod (510) is slidingly connected between the two second connecting lugs (520).

8. The device for testing the bonding performance between cement paste and aggregate according to claim 5, characterized in that: Gaskets are arranged at the connecting positions of the two second half barrel bodies (710).

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