Horizontal shear mechanical property detection clamp for road crack pouring material

Abstract

The utility model belongs to the technical field of road crack pouring material detection, and discloses a road crack pouring material horizontal shear mechanical property detection clamp which comprises a connecting piece, a clamp main body and a test block clamp, the upper part of the connecting piece is connected with a universal machine through an M16 bolt, and the bottom of the connecting piece is connected with the clamp main body part through three bolt holes; the clamp main body is provided with ten bolt holes in the same circumference, and one hole is formed every ten degrees; the connecting piece is used for adjusting the stretching angle of the universal machine to the crack pouring material test block by connecting the bolt holes with different angles of the clamp main body, so that shearing force is applied to the test block. A replaceable test block clamp is arranged at the bottom of the clamp body, and corresponding test block clamps are replaced according to test blocks of different sizes and different shearing requirements. The utility model solves the problems that the horizontal shearing test fixture is lacked in the field of crack pouring material mechanical property detection and the size of the test block of the test fixture cannot be adjusted, and promotes the improvement of the mechanical indexes of the crack pouring material.

Description

Technical Field

[0001] The utility model belongs to the technical field of road crack filling material detection, and particularly relates to a detection fixture for the horizontal shear mechanical properties of road crack filling materials. Background Technique

[0002] The mechanical property detection indexes of crack filling materials include direct tension tests. The upper and lower rectangular blocks of the test block are placed in the test block clamp of the fixture. A universal testing machine or the like is used to stretch the crack filling material test block through the tension fixture, so as to test relevant mechanical indexes.

[0003] For cracks generated by winter road surface shrinkage and irregular road surface cracks caused by horizontal shear forces generated by vehicle loads, after using crack filling materials for repair, the crack filling materials will be subjected to horizontal shear stresses. Especially for the transverse cracks generated by road surface shrinkage, which are the most common cracks, after the crack filling materials are repaired, shrinkage stresses will be generated inside them, thus generating shear stresses on the bonding walls. The mechanical experiments of conventional crack filling materials can only test the tensile properties of the crack filling materials and cannot simulate the stress conditions of the crack filling materials under horizontal shear forces.

[0004] Through the above analysis, the problems and defects existing in the prior art are as follows: the mechanical property detection indexes of existing crack filling materials are insufficient, the conventional tension test cannot simulate the shear situation of the materials, and the shear performance detection of the crack filling materials and the bonding walls is lacking. At present, there is no fixture in the market that specifically tests the horizontal shear mechanical property indexes of crack filling materials, and it is necessary to develop a fixture for testing the horizontal shear performance of crack filling materials. Content of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model provides a detection fixture for the horizontal shear mechanical properties of road crack filling materials, which is used to detect the horizontal shear resistance performance of crack filling materials.

[0006] The utility model is realized as follows: the detection fixture for the horizontal shear mechanical properties of road crack filling materials includes a connecting piece, a fixture main body and a test block clamp; the bottom of the connecting piece is connected to the fixture main body through three bolt holes with a diameter of 10 mm, the top is connected to a universal testing machine through a bolt with a diameter of 16 mm, and the inner circumferential surface is attached to the circumferential surface of the main body; the fixture main body is provided with ten bolt holes with a diameter of 10 mm on the same circumferential line, with one hole every ten degrees; the fixture main body is connected to the test block clamp through six bolt holes with a diameter of 10 mm.

[0007] Furthermore, the connecting piece adjusts the stretching angle of the test block by connecting to bolt holes at different angles on the main body fixture. The connection mode between the connecting piece and the fixture main body is a detachable bolt connection, so that the fixture main body can rotate on the connecting piece to realize the angle adjustment from 0° to 90°.

[0008] Furthermore, the specimen clamp can be replaced according to specimens of different sizes and different shear requirements. Three M10 flat-head bolts with adjustable elongation lengths are provided inside the specimen clamp to fix the specimen. The elongation length is adjusted through the hexagonal head at the tail to ensure the stability of the specimen during the test.

[0009] Furthermore, one end of the bolt is hexagonal and the other end is flat. The flat side abuts against the specimen, and the specimen is fixed by adjusting the elongation length of the bolt.

[0010] Furthermore, the connection between the connecting piece and the universal testing machine is fixed by a bolt with a diameter of 16 mm, ensuring that the fixture is tightly and stably connected to the universal testing machine during the test, improving the accuracy and reliability of the test.

[0011] Combined with the above technical solutions and the solved technical problems, the advantages and positive effects of the technical solution to be protected by the present utility model are as follows:

[0012] First, compared with traditional tensile fixtures, this fixture can adjust the angle through the screw holes, so as to apply a horizontal shear force within the range of 0-90 degrees to the specimen. Moreover, the specimen clamp can be replaced according to different specimen sizes and different shear requirements. The bolts on the specimen clamp can fix the specimen to prevent it from shifting during the experiment.

[0013] By using this fixture to conduct mechanical detection experiments on the joint sealant specimens, the shear stress at the time of failure inside the joint sealant and on the bonding wall under different-angle shear forces can be tested, and the anti-shear performance of different joint sealants and their bonding with the mixture can be obtained. Thus, more accurate detection means and indexes can be provided for the development of joint sealants for shear cracks.

[0014] The present utility model improves the detection accuracy of the horizontal shear performance of the joint sealant by adjusting the shear angle of the specimen through the threaded holes arranged on the same circumference. The specimen clamp not only improves the fixing firmness of the specimen through multiple flat-head bolts, reduces the shift of the specimen during the experiment, but also increases the contact area between the specimen and the specimen clamp, reducing the damage of the specimen caused by stress concentration during the experiment. It improves the mechanical detection indexes of the joint sealant, which has practical significance and good application prospects.

[0015] The technical solution of the present utility model fills the technical gaps in the industry at home and abroad: The present utility model fills the part of the detection of the shear performance of the joint sealant and the joint sealant and the bonding wall in the field of mechanical detection of the joint sealant, and provides a new type of variable-angle shear fixture for it.

[0016] Second, the main manifestations of the present utility model in solving the technical problems of the existing technology and obtaining significant technical progress are as follows:

[0017] Problems of the existing technology to be solved:

[0018] 1. Stability of specimen clamping: Traditional fixtures cannot adapt to specimens of different sizes and shapes, resulting in easy movement or loosening of specimens during testing, which affects the accuracy of test results. The utility model can stably clamp specimens of various sizes and shapes through a replaceable specimen clamp and an adjustable bolt design, ensuring the reliability of test results.

[0019] 2. Flexibility of tensile angle adjustment: Traditional fixtures cannot provide a sufficient range of tensile angle adjustment or the adjustment process is cumbersome. The utility model realizes flexible adjustment of the tensile angle by setting multiple bolt holes on the fixture body and allowing the connecting piece to be connected through bolt holes at different angles, meeting different test requirements.

[0020] 3. Convenience of connection to the universal testing machine: The connection method between traditional fixtures and the universal testing machine is not convenient enough, affecting the test efficiency. The utility model optimizes the design of the connecting piece, enabling the fixture to be easily connected to the universal testing machine and reducing the installation and disassembly time.

[0021] Significant technological progress obtained:

[0022] 1. Improve test accuracy: By stably clamping specimens and flexibly adjusting the tensile angle, the utility model can more accurately simulate the stress state under actual working conditions, improving the accuracy and reliability of testing.

[0023] 2. Enhance adaptability: The replaceable specimen clamp design enables the utility model to adapt to specimens of different sizes and shapes, enhancing the versatility and adaptability of the fixture.

[0024] 3. Simplify the operation process: By optimizing the connection method with the universal testing machine and the convenience of adjusting the tensile angle, the utility model simplifies the test process and improves the test efficiency.

[0025] 4. Reduce maintenance costs: The utility model has a simple structure and is easy to operate, reducing the maintenance and replacement costs caused by fixture damage or failure.

[0026] By solving the problems of specimen clamping stability, tensile angle adjustment flexibility, and connection convenience to the universal testing machine in the prior art, the utility model significantly improves the accuracy, efficiency, and adaptability of the horizontal shear mechanical property detection of road caulking materials, providing strong technical support for research and application in related fields. Description of the Drawings

[0027] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of a detection fixture for the horizontal shear mechanical properties of a road caulking material provided by an embodiment of the present utility model;

[0029] Figure 2 It is a front view of the fixture main body provided by an embodiment of the present utility model;

[0030] Figure 3 It is a side view of the fixture main body provided by an embodiment of the present utility model;

[0031] Figure 4 It is a top view of the fixture main body provided by an embodiment of the present utility model;

[0032] Figure 5 It is a front view of the connecting piece provided by an embodiment of the present utility model;

[0033] Figure 6 It is a side view of the connecting piece provided by an embodiment of the present utility model;

[0034] Figure 7 It is a top view of the connecting piece provided by an embodiment of the present utility model;

[0035] Figure 8 It is a front view of the test block clamp provided by an embodiment of the present utility model;

[0036] Figure 9 It is a top view of the test block clamp provided by an embodiment of the present utility model;

[0037] Figure 10 It is a bottom view of the test block clamp provided by an embodiment of the present utility model;

[0038] Figure 11 It is a left view of the test block clamp provided by an embodiment of the present utility model;

[0039] Figure 12 It is a right view of the test block clamp provided by an embodiment of the present utility model;

[0040] Figure 13 It is a schematic diagram of a bolt provided by an embodiment of the present utility model;

[0041] Figure 14 It is a schematic diagram of a bolt provided by an embodiment of the present utility model;

[0042] In the figure: 1. Connecting piece; 2. Fixture main body; 3. Bolt hole; 4. Specimen clamp. Specific embodiments

[0043] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0044] As Figure 1 shown, the fixture for detecting the horizontal shear mechanical properties of road crack filling materials provided by the embodiment of the present utility model includes a connecting piece, a replaceable specimen clamp, and a fixture main body with an adjustable stretching angle. The bottom of the connecting piece is connected to the fixture main body through three bolt holes with a diameter of 10 mm, and the top is connected to a universal testing machine through a bolt with a diameter of 16 mm, and its inner circumferential surface fits with the circumferential surface of the main body. The fixture main body is provided with ten bolt holes with a diameter of 10 mm on the same circumferential line, with one hole every ten degrees. The connecting piece adjusts the stretching angle of the specimen by connecting to bolt holes at different angles on the fixture main body. The fixture main body is connected to the specimen clamp through six bolt holes with a diameter of 10 mm, and the connecting bolts are flat head bolts, and the flat head side abuts against the specimen, and the specimen is fixed by adjusting the elongation length of the bolts. The specimen clamp is replaceable and can be replaced according to different sizes of specimens and different shear requirements.

[0045] Further, the connecting piece and the fixture main body are fixedly connected by bolts.

[0046] Further, the fixture main body and the universal testing machine are connected by bolts on the connecting piece.

[0047] Further, the fixture main body and the specimen clamp are connected by six bolts.

[0048] Further, the specimen clamp fixes the specimen through six connecting bolts.

[0049] Further, the fixture main body includes ten bolt holes on the same circumference, with a ten-degree interval between every two holes, and the connecting piece adjusts the angle by fixing bolts to different screw holes.

[0050] Working principle: First, the user fixes the connecting piece in the bolt hole of the fixture main body with bolts according to the required angle, and then fixes the connecting piece to the universal testing machine with bolts; fixes the specimen clamp to the fixture main body through six bolts; places the specimen in the specimen clamp, and adjusts the elongation length of the bolts to fix the specimen.

[0051] The description of the fixture for detecting the horizontal shear mechanical properties of road crack filling materials in the embodiment of the present utility model provided by the embodiment of the present utility model and Figures 2 to 14 , the following is the detailed working principle:

[0052] Fixture Composition and Connection:

[0053] Connecting Piece 1: Located at the top of the fixture, it has three bolt holes 3 with a diameter of 10 mm at the bottom. These bolt holes are used to fixedly connect the connecting piece to the fixture body 2. There is a bolt hole with a diameter of 16 mm at the top of the connecting piece, which is used to connect the whole fixture to the universal machine. The inner circumferential surface of the connecting piece is in close contact with the circumferential surface of the fixture body to ensure a firm connection and the ability to transfer force.

[0054] Fixture Body 2: It is the main structural part of the fixture. It has ten bolt holes 3 with a diameter of 10 mm. These bolt holes are located on the same circumferential line, and the distance between every two holes is ten degrees. The fixture body is connected to the connecting piece and the specimen clamp 4 through these bolt holes.

[0055] Specimen Clamp 4: It is a replaceable part used to hold specimens of different sizes and shapes. The specimen clamp is connected to the fixture body by six bolts with a diameter of 10 mm. These bolts are flat-head bolts, and the flat-head side abuts against the specimen. The specimen is fixed by adjusting the elongation length of the bolts.

[0056] Working Principle:

[0057] Specimen Clamping: According to the size and shape of the specimen to be tested, select or replace the appropriate specimen clamp 4. Place the specimen in the specimen clamp and adjust the length of the six connecting bolts to make the specimen clamp tightly hold the specimen, ensuring that the specimen will not move or loosen during the test.

[0058] Angle Adjustment: According to the test requirements, through the bolt connection between the connecting piece 1 and the fixture body 2, select different-angle bolt holes 3 on the fixture body for connection, so as to adjust the tensile angle of the specimen. Since there are ten bolt holes at intervals of ten degrees on the fixture body, any angle adjustment between 0° and 90° can be achieved.

[0059] Connection and Testing: Connect the bolt at the top of the connecting piece 1 to the universal machine to ensure that the whole fixture can be stably fixed on the universal machine. Then, according to the test requirements, apply tensile force or shear force to the specimen through the universal machine, and observe and record the deformation and failure conditions of the specimen during the force application process to evaluate its horizontal shear mechanical properties.

[0060] Through the above working principle, the fixture for detecting the horizontal shear mechanical properties of road caulking materials provided by the embodiment of the utility model can realize stable clamping of the specimen, flexible adjustment of the angle, and effective connection with the universal machine, providing a convenient and accurate testing tool for the performance detection of road caulking materials.

[0061] The following are two specific embodiments, which describe how to apply the fixture for detecting the horizontal shear mechanical properties of road caulking materials provided by the embodiment of the utility model:

[0062] Example 1: Shear performance detection of standard-sized specimens

[0063] Specimen preparation: First, prepare standard-sized specimens of road caulking materials, ensuring that the specimens are free of defects and meet the test requirements.

[0064] Fixture assembly:

[0065] Select a specimen clamp 4 that matches the size of the standard specimen and connect it to the fixture body 2 with six flat-headed bolts with a diameter of 10 mm.

[0066] Connect the connecting piece 1 to the fixture body 2 through three bolt holes with a diameter of 10 mm at the bottom to ensure a firm connection.

[0067] Angle adjustment: According to the test requirements, select the corresponding bolt holes on the fixture body 2 and screw the bolts of the connecting piece 1 into the holes to adjust the tensile angle of the specimen to the predetermined value.

[0068] Connect to the universal testing machine: Connect the bolt with a diameter of 16 mm at the top of the connecting piece 1 to the universal testing machine to ensure that the entire fixture is stably fixed on the universal testing machine.

[0069] Performance test: Apply a predetermined tensile or shear force to the specimen through the universal testing machine, observe and record the deformation and failure of the specimen, and evaluate its horizontal shear mechanical properties.

[0070] Example 2: Shear performance detection of non-standard-sized specimens

[0071] Specimen preparation: Prepare non-standard-sized specimens of road caulking materials and replace the specimen clamp 4 according to the specimen size.

[0072] Fixture adjustment: Remove the specimen clamp 4 that matches the size of the standard specimen and connect the new specimen clamp 4 to the fixture body 2 with six flat-headed bolts with a diameter of 10 mm to ensure that the specimen can be tightly clamped.

[0073] Check and adjust the connection between the connecting piece 1 and the fixture body 2 to ensure the overall stability of the fixture structure.

[0074] Angle adjustment: The same as in Example 1, according to the test requirements, connect through the bolt holes of the connecting piece 1 and the fixture body 2 to adjust the tensile angle of the specimen to the predetermined value.

[0075] Connect to the universal testing machine: Connect the bolt at the top of the connecting piece 1 to the universal testing machine to ensure that the entire fixture is stably fixed on the universal testing machine.

[0076] Performance test: Apply a predetermined tensile force or shear force to the test block through a universal testing machine, observe and record the deformation and failure conditions of the test block, and evaluate its horizontal shear mechanical properties. According to the test results, the shear performance of non-standard size test blocks under specific conditions can be further analyzed to provide reference for practical applications.

[0077] Through the detection of test blocks of various joint sealant materials, the present utility model obtains that the shear performances of different joint sealant materials bonded to the bonding wall are different, and when different angles of shear forces are applied to the same test block, the test block exhibits different shear strengths.

[0078] Compared with the mechanical detection experiments of conventional joint sealant materials, the shear experiment provided by the present utility model provides a new mechanical detection index for joint sealant materials. It can not only complete direct tensile tests, but also complete shear experiments at multiple angles, providing a more accurate experimental means for the development of joint sealant materials specifically for special cracks.

[0079] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, any modification, equivalent replacement, and improvement made within the spirit and principle of the present utility model shall be covered by the protection scope of the present utility model.

Claims

1. A testing fixture for the horizontal shear mechanical properties of a road crack filling material, characterized in that, The fixture includes: A connecting piece (1), with a bolt hole of 16 mm in diameter for connecting to a universal machine at the top and three bolt holes of 10 mm in diameter for connecting to the fixture body (2) at the bottom; The fixture body (2), with ten bolt holes (3) of 10 mm in diameter. These bolt holes are located on the same circumferential line, with a 10-degree interval between each two holes, for fixed connection with the connecting piece (1) through bolts; A specimen clamp (4), connected to the fixture body (2) by six bolts of 10 mm in diameter, for clamping the specimen.

2. The horizontal shear mechanical property testing fixture for road crack filling materials according to claim 1, wherein, The connection between the connecting piece (1) and the fixture body (2) is a detachable bolt connection, enabling the fixture body (2) to rotate on the connecting piece (1) to achieve an angular adjustment from 0° to 90°.

3. The testing fixture for the horizontal shear mechanical properties of the road crack filling material according to claim 1, characterized in that The specimen clamp (4) is internally provided with three M10 flat head bolts (5) with adjustable elongation lengths for fixing the specimen. The elongation length is adjusted by the hexagonal head at the tail to ensure the stability of the specimen during the test.

4. The fixture for detecting the horizontal shear mechanical properties of the road crack filling material according to claim 1, wherein, The connection between the connecting piece (1) and the universal machine is fixed using a bolt of 16 mm in diameter to ensure a tight and stable connection between the fixture and the universal machine during the test, improving the accuracy and reliability of the test.

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