Testing device for testing tensile strength in interface bonding performance of new and old concrete

Abstract

The utility model relates to the technical field of building reinforcement construction and testing, in particular to a testing device for testing tensile strength in new and old concrete interface bonding performance, which comprises a bottom plate, a universal testing machine fixedly mounted at the top of the bottom plate, a vibration device fixedly mounted at the top of the bottom plate, and a connecting device fixedly mounted at the top of the vibration device. The device has the advantages that concrete is conveniently poured in the mold box, then a test is directly carried out, the use experience can be effectively improved, the mold box can be conveniently detached, then the mold box can be conveniently maintained and cleaned, and the device is convenient to use, high in practicability and convenient to popularize and use. And the use experience is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building reinforcement construction and test technology, especially to a test device for testing the tensile strength of the interface bonding performance between new and old concrete. BACKGROUND

[0002] In many projects, concrete members are subjected to tensile, bending and other forces. Therefore, understanding the tensile properties of concrete members can help engineers better predict the overall load-carrying capacity and safety of the structure. Tensile strength testing can effectively evaluate the bonding strength between new and old concrete. By measuring the damage at the interface under tension, the bonding force between the two and the quality of their interaction can be directly observed. Tensile strength testing can also provide a basis for optimizing the construction process of new and old concrete joints. By analyzing the impact of different materials, proportions or construction methods on bonding strength, a more scientific and effective construction plan can be developed, thereby improving the durability and service life of the structure.

[0003] The utility model discloses a kind of test devices for testing the tensile strength of the interface bonding performance between new and old concrete, including universal testing machine, the inner top wall and inner bottom wall of the universal testing machine are equipped with chuck, each described chuck is fixedly clamped with bolt, two described bolts are fixedly connected with steel plate, two described bolts and steel plate are respectively fixed with old concrete test block and new concrete test block, the old concrete test block and new concrete test block are bonded into an entirety together. It is made that new and old concrete whole test piece that inside anchoring steel plate and bolt are bonded together by pouring new concrete test block and old concrete test block in succession. Not only simple and convenient to make process, but also easy to test operation, without drilling core. Test block can be used repeatedly after breaking, test operation is simple and easy to operate, and the tensile strength of new and old concrete bonding interface can be effectively detected.

[0004] But the above-mentioned patent pours new concrete test block and old concrete test block in succession, makes new concrete test block and old concrete test block bonded into an entirety, then carries out tension, so as to calculate tensile strength, which is inconvenient to vibrate concrete when pouring new concrete test block and old concrete test block, so that air bubbles can be generated during pouring, affecting the accuracy of tension use. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of test device for testing the tensile strength of the interface bonding performance between new and old concrete, which can be directly poured on the equipment and bonded by the user, effectively improving the use experience.

[0006] The utility model discloses a test device for testing the tensile strength of the interface bonding performance between new and old concrete, which comprises a base plate, a universal testing machine fixedly installed on the top of the base plate, a vibration device fixedly installed on the top of the base plate, a connecting device fixedly installed on the top of the vibration device, a mold box fixedly connected to the vibration device through the connecting device, and a chuck fixedly connected to the bottom end of the universal testing machine and in the mold box.

[0007] Preferably, the vibration device comprises a mounting block, a pair of mounting blocks are symmetrically fixedly installed on the top of the base plate, a pair of movable columns are symmetrically slidably installed in the pair of mounting blocks, a first spring is sleeved on one end of each of the pair of movable columns, an installation frame is fixedly connected to the end of each of the pair of movable columns close to the first spring, an installation plate is slidably installed in the installation frame, a motor is fixedly installed in the middle of the installation plate, a cam is fixedly connected to the output end of the motor, a fixed column is slidably connected to the outer wall of each end of the installation plate, and a second spring is sleeved on the surface of the fixed column.

[0008] Preferably, the connecting device comprises a connecting column, a blind hole is formed in the top of the connecting column, a through hole is formed in the outer wall of the top end of the connecting column, a connecting block is movably installed in the blind hole, the connecting block is fixedly connected to the top of the mold box, a receiving groove is formed in the connecting block, a third spring is fixedly connected to the receiving groove, a telescopic column is fixedly connected to the other end of the third spring, and the telescopic column passes through the through hole.

[0009] Preferably, a round corner is formed at each sharp corner of the base plate.

[0010] Preferably, a fixed block is fixedly installed at each corner of the bottom end of the base plate, and an installation hole is formed in the surface of the fixed block.

[0011] Preferably, the motor is a double-head motor.

[0012] Preferably, a dome is fixedly installed at the end of the telescopic column passing through the through hole.

[0013] The utility model discloses the old concrete that needs to test is poured into the mold box, then starts the vibration device, and then reduces the bubble in the concrete, then pours the new concrete again, starts the vibration device again and starts the universal testing machine, inserts the chuck on the universal testing machine into the new concrete, at this moment, when the interface of the new and old concrete is bonded together, the test can be started, and after the test is completed, the mold box can be disassembled, so that the mold box can be conveniently cleaned and maintained.

[0014] Compared with the prior art, the utility model has the advantages that the concrete in the mold box can be vibrated, so that the gap in the concrete is reduced, the use experience is improved, the mold box is conveniently disassembled, and the mold box can be conveniently cleaned and maintained.

[0015] Compared with the prior art, the utility model has the advantages that the gap in the test concrete is reduced, and the mold box can be conveniently disassembled and cleaned and maintained. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A test device structure schematic view of tensile strength in the test of the interface bonding performance between new and old concrete is provided in the utility model.

[0017] Figure 2 An internal structure schematic view of the test device of tensile strength in the test of the interface bonding performance between new and old concrete is provided in the utility model.

[0018] Figure 3 An enlarged view of A of the test device of tensile strength in the test of the interface bonding performance between new and old concrete is provided in the utility model.

[0019] Figure 4 An enlarged view of B of the test device of tensile strength in the test of the interface bonding performance between new and old concrete is provided in the utility model.

[0020] The figure mark explanation: 1, bottom plate;12, universal testing machine;13, mold box;14, chuck;2, vibration device;21, mounting block;22, movable column;23, first spring;24, mounting frame;25, mounting plate;26, motor;27, cam;28, fixed column;29, second spring;3, connecting device;31, connecting column;32, blind hole;33, through hole;34, connecting block;35, storage groove;36, third spring;37, telescopic column;4, round corner;5, fixed block;51, mounting hole;6, dome. Specific implementation

[0021] In order to make the technical means, creative features, purposes and effects realized by the embodiments of the application easy to understand, the embodiments of the application are further described below in combination with the drawings and specific embodiments.

[0022] As Figure 1 and Figure 2 A test device of tensile strength in the test of the interface bonding performance between new and old concrete, including bottom plate 1, the top of bottom plate 1 is fixedly installed with universal testing machine 12, the top of bottom plate 1 is fixedly installed with vibration device 2, vibration device 2 top is fixedly installed with connecting device 3, vibration device 2 is fixedly connected with mold box 13 through connecting device 3, the inside of mold box 13 and the bottom end of universal testing machine 12 are fixedly connected with chuck 14, the sharp place of bottom plate 1 is all set with round corner 4, round corner 4 can effectively reduce the harm caused by bumping, also can avoid scratching users, the bottom end of bottom plate 1 four corners is fixedly installed with fixed block 5, the surface of fixed block 5 is set with mounting hole 51, can be fixedly installed by setting bolt and other fixing tools in mounting hole 51.

[0023] As Figure 2 and Figure 3As shown, the vibration device 2 comprises a mounting block 21, the mounting block 21 is provided with a pair, the pair of mounting blocks 21 is symmetrically fixed on the top of the bottom plate 1, a pair of movable columns 22 is symmetrically and slidingly installed in the mounting block 21, a first spring 23 is sleeved on one end of the movable column 22, a mounting frame 24 is fixedly connected to the end of the movable column 22 close to the first spring 23, a mounting plate 25 is slidingly installed in the mounting frame 24, a motor 26 is fixedly installed in the middle of the mounting plate 25, a cam 27 is fixedly connected to the output end of the motor 26, a fixed column 28 is slidingly connected to the outer wall of both ends of the mounting plate 25, a second spring 29 is sleeved on the surface of the fixed column 28, and the motor 26 is a double-head motor. The double-head motor can adopt F103 and the like. The both ends of the model are provided with output ends, so that the both ends of the motor 26 can be fixedly connected with the cam 27.

[0024] In specific implementation, only the motor 26 is started, the rotation of the motor 26 drives the rotation of the cam 27, the rotation of the cam 27 drives the shaking of the motor 26 due to centrifugal force, the shaking of the motor 26 drives the shaking of the mounting plate 25 and the mounting frame 24, the shaking of the mounting plate 25 and the mounting frame 24 respectively compresses the first spring 23 and the second spring 29, and the first spring 23 and the second spring 29 are energy storage elements that are released again after being contracted, thereby further increasing the shaking effect and making the mounting plate 25 shake efficiently. The shaking of the mounting plate 25 drives the shaking of the connecting device 3, thereby driving the shaking of the mold box 13, and the shaking of the mold box 13 reduces the internal concrete gap, thereby improving the use experience. The user only needs to send the chuck 14 into the mold box 13 through the universal testing machine 12, at this time, the new and old concrete can be put into the mold box 13, thereby facilitating the test.

[0025] As shown in Figure 2 and Figure 4 The connecting device 3 comprises a connecting column 31, a blind hole 32 is formed in the top of the connecting column 31, a through hole 33 is formed in the outer wall of the top end of the connecting column 31, a connecting block 34 is movably installed in the blind hole 32, the connecting block 34 is fixedly connected to the top of the mold box 13, a receiving groove 35 is formed in the connecting block 34, a third spring 36 is fixedly connected in the receiving groove 35, a telescopic column 37 is fixedly connected to the other end of the third spring 36, the telescopic column 37 passes through the through hole 33, a dome 6 is fixedly installed at one end of the telescopic column 37 passing through the through hole 33, and the semicircular structure of the dome 6 can effectively reduce the contact area and thereby reduce the friction force, facilitating sliding.

[0026] In the specific implementation, only need to press the dome 6, make the dome 6 push the telescopic column 37 to retract into the storage groove 35 and compress the third spring 36, when the telescopic column 37 retracts into the storage groove 35 with the dome 6, it can hold the mold box 13 upwards and lift upwards, at this time the mold box 13 will drive the connecting block 34 to leave the blind hole 32, thereby completing disassembly, and installation only needs to align the connecting block 34 with the blind hole 32 and reinsert, at this time the telescopic column 37 will push the telescopic column 37 to pass through the perforated hole 33 under the thrust of the third spring 36, thereby completing the fixation.

Claims

1. A test device for testing the tensile strength of the interfacial bonding performance between new and old concrete, comprising a base plate (1), a universal testing machine (12) is fixedly installed on the top of the base plate (1), characterized in that: The bottom plate (1) top fixedly installed with vibration device (2), vibration device (2) top fixedly installed with connecting device (3), vibration device (2) is fixedly connected with mould box (13) through connecting device (3), mould box (13) and universal testing machine (12) bottom end are all fixedly connected with chuck (14).

2. The test device for testing the tensile strength in the bonding performance of the interface between new and old concrete according to claim 1, characterized in that: The vibration device (2) includes a mounting block (21), a pair of mounting blocks (21) are symmetrically fixedly installed on the top of the bottom plate (1), a pair of movable columns (22) are symmetrically and slidably installed in the pair of mounting blocks (21), a first spring (23) is sleeved on one end of each movable column (22), an installation frame (24) is fixedly connected to one end of each movable column (22) near the first spring (23), an installation plate (25) is slidably installed in the installation frame (24), a motor (26) is fixedly installed in the middle of the installation plate (25), a cam (27) is fixedly connected to the output end of the motor (26), a fixed column (28) is slidably connected to the outer wall of each end of the installation plate (25), and a second spring (29) is sleeved on the surface of the fixed column (28).

3. The test device for testing the tensile strength of the interface bonding between new and old concrete according to claim 1 or 2, characterized in that: The connecting device (3) includes a connecting column (31), a blind hole (32) is formed in the top of the connecting column (31), a through hole (33) is formed in the outer wall of the top end of the connecting column (31), a connecting block (34) is movably installed in the blind hole (32), the connecting block (34) is fixedly connected to the top of the mould box (13), a receiving groove (35) is formed in the connecting block (34), a third spring (36) is fixedly connected to the receiving groove (35), a telescopic column (37) is fixedly connected to the other end of the third spring (36), and the telescopic column (37) passes through the through hole (33).

4. The test device for testing the tensile strength of the interface bonding between new and old concrete according to claim 1 or 2, characterized in that: The sharp corners of the bottom plate (1) are all provided with a round corner (4).

5. The test device for testing the tensile strength of the interface between new and old concrete according to claim 3, wherein: The sharp corners of the bottom plate (1) are all provided with a round corner (4).

6. The test device for testing the tensile strength of the interface bonding between new and old concrete according to claim 1, 2 or 5, characterized in that: The bottom plate (1) is provided with a fixed block (5) at the bottom end of each corner, and an installation hole (51) is formed in the surface of the fixed block (5).

7. The test device for testing the tensile strength of the interface between new and old concrete according to claim 3, wherein: The bottom plate (1) is provided with a fixed block (5) at the bottom end of each corner, and an installation hole (51) is formed in the surface of the fixed block (5).

8. The test device for testing the tensile strength of the interface bonding between new and old concrete according to claim 4, wherein: The bottom plate (1) is provided with a fixed block (5) at the bottom end of each corner, and an installation hole (51) is formed in the surface of the fixed block (5).

9. The test device for testing the tensile strength of the interface between new and old concrete according to claim 2, wherein: The motor (26) is a double-head motor.

10. The test device for testing the tensile strength of the interface between new and old concrete according to claim 3, wherein: A dome (6) is fixedly installed on one end of the telescopic column (37) passing through the through hole (33).

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