Auxiliary device for testing interlayer shear strength of pavement seal material

Abstract

The utility model discloses an auxiliary device for testing interlayer shear strength of a pavement seal material, which belongs to the technical field of road engineering test equipment, and adopts the technical scheme that the auxiliary device comprises a main body plate, and a test piece fixing assembly is arranged at the top of the main body plate. The test piece placing groove is used for preliminarily positioning a seal material test piece, the seal material test piece can be firmly fixed on the main body plate by matching with the clamping block and the bolt, the fixing mode is high in precision, the seal material test piece is effectively prevented from shifting or rotating in the process of applying shear force, the accuracy of a test result is greatly improved, and the test efficiency is improved. Bolts are matched with the connecting threaded holes and the clamping block threaded holes, adjustment can be conducted according to the thicknesses of different seal material test pieces, so that the device is higher in compatibility with the seal material test pieces of different sizes, and even if the seal material test pieces have certain size deviation, the seal material test pieces can be fixed by adjusting the positions of the clamping blocks.

Description

TECHNICAL FIELD

[0001] The utility model relates to road engineering testing equipment technical field, especially in a kind of interlayer shear strength test auxiliary device of pavement seal coat material. BACKGROUND

[0002] With the continuous growth of traffic volume and the increasingly heavy vehicle load, higher requirements are put forward for the service performance and durability of pavement, and as an important measure to improve the waterproof, anti-skid and wear-resistant performance of pavement, the interlayer bonding performance of pavement seal coat directly affects the overall structural strength and service life of pavement, and interlayer shear strength is a key parameter to measure the bonding performance of pavement seal coat material, and accurate testing of the parameter has important significance for reasonable design of pavement structure and selection of appropriate seal coat material, at present, the commonly used interlayer shear strength test methods of pavement seal coat material mainly include direct shear test, torsional shear test and oblique shear test.

[0003] However, the existing test device has some deficiencies in actual application, on the one hand, the fixing mode of the traditional test device to the test piece is not accurate enough, and the test piece is prone to deviation or rotation during the application of shear force, thereby affecting the accuracy of test results, on the other hand, the traditional shear device has high requirements for the size of the test piece, and due to the influence of manual work, temperature and other factors in the manufacturing process, some test pieces have size deviation, and excessive deviation may not be correctly placed in the slot of the shear device, so that the shear resistance of the test piece cannot be fully tested.

[0004] Therefore, an interlayer shear strength test auxiliary device for pavement seal coat material is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an interlayer shear strength test auxiliary device for pavement seal coat material, which can solve the problems of the existing test device in actual application, on the one hand, the fixing mode of the traditional test device to the test piece is not accurate enough, and the test piece is prone to deviation or rotation during the application of shear force, thereby affecting the accuracy of test results, on the other hand, the traditional shear device has high requirements for the size of the test piece, and due to the influence of manual work, temperature and other factors in the manufacturing process, some test pieces have size deviation, and excessive deviation may not be correctly placed in the slot of the shear device, so that the shear resistance of the test piece cannot be fully tested.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an interlayer shear strength test auxiliary device for pavement seal coat material, comprising a main plate, a test piece fixing assembly is arranged on the top of the main plate, and a seal coat material test piece is arranged on the inner side of the test piece fixing assembly.

[0007] The test piece fixing assembly includes a test piece placing groove opened on the top of the main plate, the test piece placing groove is inserted with the seal layer material test piece, two sides of the front side and the rear side of the top of the main plate are provided with connecting threaded holes, the connecting threaded holes are located outside the test piece placing groove, the top of the main plate is provided with a clamping block, two sides of the front side and the rear side of the top of the clamping block are provided with clamping block threaded holes, the inside of the clamping block threaded holes is provided with a bolt, the bottom of the bolt is threadedly connected in the inside of the connecting threaded hole, and the bolt is located outside the seal layer material test piece.

[0008] Preferably, the length of the bolt is greater than or equal to half the length of the main plate, and the top of the bolt is hexagonal.

[0009] Preferably, the width of the test piece placing groove is greater than or equal to the maximum allowable size of the seal layer material test piece, and the inside of the test piece placing groove is smooth.

[0010] Preferably, the main plate, the clamping block and the bolt are all made of high-strength alloy material.

[0011] Preferably, the inside of the test piece placing groove and the clamping block are both provided with a matching pad made of rubber material.

[0012] Preferably, the inside of the matching pad is provided with anti-skid lines in a grid shape.

[0013] Preferably, the bottom of the main plate is fixedly connected with a threaded rod, and the threaded rod is used in connection with the UTM testing machine.

[0014] Preferably, the surface of the bolt is coated with a wear-resistant coating, and the surface of the threaded rod is coated with a corrosion-resistant and wear-resistant coating.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1、The test piece fixing assembly is provided, the seal layer material test piece is preliminarily positioned by the test piece placing groove, and the seal layer material test piece is fixed on the main plate by the clamping block and the bolt, so that the fixing mode is high in precision, the seal layer material test piece is effectively prevented from shifting or rotating in the process of applying shear force, the accuracy of test results is greatly improved, the bolt is matched with the connecting threaded hole and the clamping block threaded hole, the thickness of different seal layer material test pieces can be adjusted, the device is more compatible with different sizes of seal layer material test pieces, the seal layer material test piece can be fixed by adjusting the position of the clamping block even if there is a certain size deviation, and the shear resistance of the seal layer material test piece is comprehensively tested.

[0017] 2. This application, by setting up sealing material specimens, ensures that they can stably withstand shear force during testing on the basis of precise fixation, thereby providing a guarantee for obtaining accurate interlayer shear strength data. This helps road engineering designers to more accurately understand the performance of sealing materials, so as to rationally select sealing materials, optimize pavement structure design, and improve the overall quality and service life of the pavement. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the auxiliary device for testing the interlayer shear strength of road seal material according to this utility model;

[0019] Figure 2 This is a structural diagram of the specimen fixing assembly of this utility model;

[0020] Figure 3 This is a structural diagram of the bonding pad of this utility model;

[0021] Figure 4 This is a top view of the main structural component of this utility model;

[0022] Figure 5 This is a front view structural diagram of the main body of this utility model.

[0023] In the figure, 1. Main plate; 2. Threaded rod; 3. Specimen fixing assembly; 31. Specimen placement groove; 32. Connecting threaded hole; 33. Clamping block; 34. Clamping block threaded hole; 35. Bolt; 4. Sealing material specimen; 5. Adhesive gasket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 The present invention provides the following technical solution:

[0026] An auxiliary device for testing the interlayer shear strength of road seal material includes a main plate 1, a specimen fixing component 3 is provided on the top of the main plate 1, and a seal material specimen 4 is provided on the inner side of the specimen fixing component 3.

[0027] The test piece fixing assembly 3 comprises a test piece placing groove 31 opened on the top of the main plate 1, the test piece placing groove 31 is inserted with the sealant test piece 4, the front side and the rear side of the top of the main plate 1 are both provided with a connecting threaded hole 32, the connecting threaded hole 32 is located outside the test piece placing groove 31, the top of the main plate 1 is provided with a clamping block 33, the front side and the rear side of the top of the clamping block 33 are both provided with a clamping block threaded hole 34, the inside of the clamping block threaded hole 34 is provided with a bolt 35, the bottom of the bolt 35 is threadedly connected in the inside of the connecting threaded hole 32, and the bolt 35 is located outside the sealant test piece 4.

[0028] In the embodiment, by arranging the test piece fixing assembly 3, when preparing for the test, the sealant test piece 4 is inserted into the test piece placing groove 31 on the top of the main plate 1, the test piece placing groove 31 is designed to match the sealant test piece 4, can preliminarily position the sealant test piece 4, limit the sealant test piece 4 from moving greatly in the horizontal direction, and provide a basis for subsequent accurate fixing, then the connecting threaded hole 32 on the front side and the rear side of the top of the main plate 1 and the clamping block threaded hole 34 on the corresponding position of the clamping block 33 play a role, the bolt 35 is passed through the clamping block threaded hole 34 and then screwed into the connecting threaded hole 32, by rotating the bolt 35, the distance between the clamping block 33 and the main plate 1 can be adjusted, when the bolt 35 is gradually tightened, the clamping block 33 gradually approaches the main plate 1, so as to apply pressure to the sealant test piece 4 located between the clamping block 33 and the main plate 1, in this process, the bolt 35 is located outside the sealant test piece 4, can uniformly apply force to the sealant test piece 4 from all around, and since the bolt 35 is threadedly connected with the connecting threaded hole 32 and the clamping block threaded hole 34, the connection mode can realize accurate adjustment, no matter whether the sealant test piece 4 is relatively thin or thick, or whether the sealant test piece 4 has a certain size deviation, the position of the clamping block 33 can be changed by fine-tuning the bolt 35, so that the clamping block 33 tightly adheres to the surface of the sealant test piece 4, and stable fixing is realized, when the device is installed on the test equipment to perform interlayer shear strength test, the stably fixed sealant test piece 4 can keep its position stable in the process of bearing shear force, and the deviation or rotation of the sealant test piece 4 is avoided, in this way, the shear force applied by the test equipment can be accurately applied to the sealant test piece 4, so that accurate and reliable interlayer shear strength data is obtained, and a strong basis is provided for pavement sealant performance evaluation and road engineering design.

[0029] Specifically, as shown in Figure 2 the length of the bolt 35 is greater than or equal to half the length of the main plate 1, and the top of the bolt 35 is hexagonal.

[0030] Specifically, as shown in Figure 2 the width of the test piece placing groove 31 is greater than or equal to the maximum allowable size of the sealant test piece 4, and the inside of the test piece placing groove 31 is smooth.

[0031] Specifically, as shown in Figure 2 The main plate 1, the clamping block 33 and the bolt 35 are all made of high-strength alloy material.

[0032] In this embodiment: by setting the length of the bolt 35 greater than or equal to half the length of the main plate 1, and the top of the bolt 35 is hexagonal, not only ensures that the bolt 35 has enough length to pass through the clamping block 33 and be screwed with the main plate 1 to achieve reliable fastening, but also facilitates the use of tools such as wrenches to operate, improving the convenience of installation and disassembly, and when fixing the seal layer material test piece 4, the long bolt 35 can provide greater fastening force, ensuring that the clamping block 33 stably presses the seal layer material test piece 4, avoiding the seal layer material test piece 4 from loosening due to insufficient fastening force during testing, thereby improving the accuracy of the test results, the width of the seal layer material test piece 4 placement groove 31 is greater than or equal to the maximum allowable size of the seal layer material test piece 4, and the inside is smooth, on the one hand, it can accommodate seal layer material test pieces 4 of different sizes, reducing the probability that the seal layer material test piece 4 cannot be tested due to size deviation, making the test more universal, on the other hand, the smooth inside can reduce the friction when the seal layer material test piece 4 is placed, facilitating the accurate placement of the seal layer material test piece 4, while avoiding damage to the seal layer material test piece 4, ensuring that the test results are not affected by the surface wear of the seal layer material test piece 4, the main plate 1, the clamping block 33 and the bolt 35 are all made of high-strength alloy material, which has good mechanical properties and stability, can withstand various forces generated during testing, such as shear force and pressure, ensuring that the device is not easily deformed or damaged during long-term use, prolonging the service life of the device, and also ensuring the stability of the device structure during each test, providing reliable protection for accurate measurement.

[0033] Specifically, as shown in Figure 3 The inside of the clamping block 33 and the test piece placement groove 31 is provided with a matching pad 5, which is made of rubber material.

[0034] Specifically, as shown in Figure 3 The inside of the clamping block 33 and the test piece placement groove 31 is provided with a matching pad 5, which is made of rubber material.

[0035] In this embodiment: by setting the matching pad 5, which is made of rubber material, has good elasticity and friction, when the clamping block 33 clamps the seal layer material test piece 4, the matching pad 5 can tightly fit the surface of the seal layer material test piece 4, increasing the friction between the clamping block 33 and the seal layer material test piece 4, preventing the seal layer material test piece 4 from sliding during testing, further improving the stability of the fixation, at the same time, the rubber matching pad 5 can also play a buffering role, avoiding the direct rigid contact between the clamping block 33 and the seal layer material test piece 4 to damage the seal layer material test piece 4, ensuring the accuracy of the test data.

[0036] Specifically, as shown inFigure 1 As shown, a threaded rod 2 is fixedly connected to the bottom of the main plate 1, and the threaded rod 2 is connected to the UTM energy testing machine for use.

[0037] Specifically, such as Figure 2 As shown, the surface of bolt 35 is coated with a wear-resistant coating, and the surface of threaded rod 2 is coated with an anti-corrosion and wear-resistant coating.

[0038] In this embodiment: by setting the threaded rod 2 fixedly connected to the bottom of the main plate 1 and connecting it to the UTM universal testing machine, a fast and stable connection between the testing auxiliary device and the UTM testing machine is achieved. This ensures that the force applied by the UTM testing machine can be accurately transmitted during the test, so that the sealing material specimen 4 can be subjected to precise shear force, ensuring the smooth progress of the test process and obtaining reliable test data. In addition, the wear-resistant coating on the surface of the bolt 35 and the anti-corrosion and wear-resistant coating on the surface of the threaded rod 2 can effectively reduce the wear of the bolt 35 during frequent tightening and loosening, and extend the service life of the bolt 35. The anti-corrosion and wear-resistant coating on the surface of the threaded rod 2 can prevent it from rusting and corroding in humid or corrosive environments, ensuring the reliability and stability of the connection between the threaded rod 2 and the UTM testing machine, and avoiding the test results being affected or the device being unable to function properly due to damage to the threaded rod 2.

[0039] Working principle: in the process of using the auxiliary device for testing interlayer shear strength of pavement seal coat material, first, connect the threaded rod 2 at the bottom of the main plate 1 with the UTM universal testing machine, since the surface of the threaded rod 2 is coated with a corrosion-resistant and wear-resistant coating, it can ensure stable connection with the testing machine in a humid or corrosive environment, and it is not easy to be damaged in long-term use, ensuring that the force applied by the testing machine can be accurately transmitted to the device, then install the seal coat material test piece 4, insert the seal coat material test piece 4 into the test piece placing groove 31 at the top of the main plate 1, the groove has a width greater than or equal to the maximum allowable size of the seal coat material test piece 4 and a smooth inner side, which not only reduces the probability that the seal coat material test piece 4 cannot be tested due to size deviation, but also facilitates the accurate positioning of the seal coat material test piece 4, while avoiding surface wear that affects testing, then pass the bolt 35 through the clamping block threaded hole 34 on the clamping block 33 and screw it into the connecting threaded hole 32 of the main plate 1, the length of the bolt 35 is greater than or equal to half the length of the main plate 1 and the top is hexagonal, which not only facilitates tool operation, but also provides sufficient tightening force, by rotating the bolt 35, the distance between the clamping block 33 and the main plate 1 is adjusted, so that the clamping block 33 gradually approaches and compresses the seal coat material test piece 4, since the bolt 35 and the threaded hole are threadedly connected, they can be accurately adjusted to adapt to seal coat material test pieces 4 of different thicknesses or with size deviation, and the rubber pad 5 inside the clamping block 33 and the test piece placing groove 31 plays an important role, the pad 5 has good elasticity and friction, and the inner side has a grid-shaped non-slip pattern, which can tightly fit the surface of the seal coat material test piece 4, increase the friction to prevent sliding, and also serve as a buffer to avoid damaging the seal coat material test piece 4, when the device is connected to the testing machine and the seal coat material test piece 4 is fixed, the UTM universal testing machine starts to apply shear force, since the device is made of high-strength alloy material, it can withstand the shear force and pressure during testing without deformation or damage, ensuring stable structure, and the stably fixed seal coat material test piece 4 remains stable in position when subjected to shear force, avoiding deviation or rotation, so that the shear force applied by the testing machine acts accurately on the seal coat material test piece 4, thereby obtaining accurate and reliable interlayer shear strength data, providing a strong basis for pavement seal coat material performance evaluation and road engineering design.

[0040] The above is only a preferred embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An auxiliary device for interlayer shear strength testing of a pavement seal coat material layer, comprising a main plate (1), characterized in that: The top of the main plate (1) is provided with a test piece fixing assembly (3), and the inner side of the test piece fixing assembly (3) is provided with a seal layer material test piece (4); The test piece fixing assembly (3) comprises a test piece placing groove (31) opened in the top of the main plate (1), the test piece placing groove (31) is inserted with the seal layer material test piece (4), both sides of the front side and the rear side of the top of the main plate (1) are provided with connecting threaded holes (32), the connecting threaded holes (32) are located outside the test piece placing groove (31), the top of the main plate (1) is provided with a clamping block (33), both sides of the front side and the rear side of the top of the clamping block (33) are provided with clamping block threaded holes (34), the inside of the clamping block threaded holes (34) is provided with bolts (35), the bottom of the bolts (35) is threadedly connected in the inside of the connecting threaded holes (32), and the bolts (35) are located outside the seal layer material test piece (4).

2. The interlayer shear strength testing aid for a pavement seal coat material of claim 1, wherein: The length of the bolt (35) is greater than or equal to half the length of the main plate (1), and the top of the bolt (35) is hexagonal.

3. The interlayer shear strength testing aid for a pavement seal coat material of claim 1, wherein: The width of the test piece placing groove (31) is greater than or equal to the maximum allowable size of the seal layer material test piece (4), and the inner side of the test piece placing groove (31) is smooth.

4. The interlayer shear strength testing aid for a pavement seal coat material of claim 1, wherein: The main plate (1), the clamping block (33) and the bolt (35) are all made of high-strength alloy material.

5. The interlayer shear strength testing aid for a pavement seal coat material of claim 1, wherein: The inner side of the clamping block (33) and the test piece placing groove (31) is provided with a matching pad (5), and the matching pad (5) is made of rubber material.

6. The interlayer shear strength testing aid for a pavement seal coat material of claim 5, wherein: The inner side of the matching pad (5) is provided with anti-skid lines, and the anti-skid lines are grid-shaped.

7. The interlayer shear strength testing aid for a pavement seal coat material of claim 1, wherein: The bottom of the main plate (1) is fixedly connected with a threaded rod (2), and the threaded rod (2) is connected with a UTM capable test machine for use.

8. The interlayer shear strength testing aid for a pavement seal coat material of claim 7, wherein: The surface of the bolt (35) is coated with a wear-resistant coating, and the surface of the threaded rod (2) is coated with a corrosion-resistant and wear-resistant coating.

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