Testing device for evaluating shearing strength of basalt fiber rib net asphalt pavement

Abstract

The utility model discloses a testing device for evaluating the shear strength of a basalt fiber rib net asphalt pavement, which comprises a first support and a second support, the first support and the second support are oppositely arranged, and the first support and the second support are arranged together in a manner of being close to each other and being far away from each other. A first sample fixing plate is arranged on the long side of the outer side of the first support, and a second sample fixing plate is arranged on the long side of the outer side of the second support; a shearing pressure head is arranged above the first support and the second support and is positioned between the first sample fixing plate and the second sample fixing plate. The test device for evaluating the shear strength of the basalt fiber rib net asphalt pavement solves the problems that the existing test mode of the interlayer shear strength of the asphalt pavement needs to be completed by adopting a cylindrical test piece and manufacturing a special test instrument in a matched manner, so that the operation is complicated, and the cost is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of asphalt pavement test, specifically relates to a test device for evaluating basalt fiber rib mesh asphalt pavement shear strength. BACKGROUND

[0002] As the main form of highway in China, the interlayer shear strength of asphalt pavement has an important influence on the stability and durability of the road. Since the layers of the pavement are usually built at different times, the interlayer interface is often the weak link in the pavement structure. Even if measures such as spraying adhesive or sealer oil are taken, the interlayer may not provide sufficient shear capacity due to factors such as pollution and temperature difference. If the interlayer shear strength is insufficient, the interlayer bonding capacity will decrease under the repeated action of vehicle load, which may cause rutting, structure layer displacement, heaving, cracking and other diseases in the pavement, affecting driving safety and service life. The shear strength of the interlayer of the asphalt pavement is a key strength index, which is crucial to the stability and durability of the pavement. At present, there are various test methods for the interlayer shear strength of the asphalt pavement, but the test specimens used in the test are mostly cylindrical specimens, and special test instruments such as direct shear apparatus, inclined shear apparatus, SST shear test apparatus, LPDS shear test apparatus, etc. are needed, which not only complicates the operation, but also increases the cost. SUMMARY

[0003] The utility model discloses a kind of test devices for evaluating basalt fiber rib mesh asphalt pavement shear strength, solve the test method of interlayer shear strength of existing asphalt pavement, need to be used cylindrical specimen and special test instrument cooperation is completed, it causes the problem of complicated operation, cost increase.

[0004] In order to solve the above technical problems, the utility model discloses a kind of test devices for evaluating basalt fiber rib mesh asphalt pavement shear strength, including first support and second support, the first support and second support are oppositely arranged, and the first support and second support can be arranged together by being close to each other, the first support is provided with first test sample fixed plate on the outside long side, and the second support is provided with second test sample fixed plate on the outside long side;The upper portion of the first support and the second support is arranged with shear pressure head, and the shear pressure head is located between the first test sample fixed plate and the second test sample fixed plate.

[0005] The technical scheme of the utility model also has the following characteristics:

[0006] As a preferred scheme of the utility model, the inner side long side of the first support is provided with a pair of transmission rods, the second support is sleeved on the pair of transmission rods, the two short sides of the first support are both provided with the first fixed seat, the two short sides of the second support are both provided with the second fixed seat, the first fixed seat is provided with the slide rail between the corresponding second fixed seat, and the second fixed seat is provided with the locking bolt.

[0007] As a preferred scheme of the utility model, the first support and the first sample fixed plate are connected through the bolt, and the second support and the second sample fixed plate are connected through the bolt.

[0008] Compared with the prior art, the utility model discloses a test device for evaluating basalt fiber rib mesh asphalt pavement shear strength, does not need to customize special instrument equipment, can save the cost, and the operability is strong, adopts the composite track board type test piece when carrying out the experiment, can eliminate the test piece size influence, simulates the actual stress condition, thereby improving the test precision. BRIEF DESCRIPTION OF DRAWINGS

[0009] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model, and the illustrative embodiment and the description thereof of the utility model are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0010] Figure 1 It is a structural schematic view of the utility model for evaluating basalt fiber rib mesh asphalt pavement shear strength's test device.

[0011] In the drawing: 1. first support, 2. first sample fixed plate, 3. shear pressure head, 4. second support, 5. second sample fixed plate, 6. bolt, 7. second fixed seat, 8. transmission rod, 9. slide rail, 10. locking bolt. DETAILED DESCRIPTION

[0012] The embodiment of the utility model is described in detail below, and the examples of the embodiment are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiment described below by referring to the drawings is exemplary, is only used to explain the utility model, and can not be understood as the limitation of the utility model.

[0013] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing and connecting should be understood broadly, and the skilled person in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0014] Embodiment 1

[0015] As Figure 1The utility model discloses a kind of test devices for evaluating basalt fiber rib mesh asphalt pavement shear strength, including first support 1 and second support 4, first support 1 and second support 4 are oppositely arranged on the same horizontal plane, and first support 1 and second support 4 can be arranged together by being close to each other, being far away from each other, the outside long side of first support 1 is provided with first sample fixed plate 2, and the outside long side of second support 4 is provided with second sample fixed plate 5;Shear pressure head 3 is arranged above first support 1 and second support 4, and shear pressure head 3 is located between first sample fixed plate 2 and second sample fixed plate 5.

[0016] When testing: first, first support 1 and first sample fixed plate 2, second support 4 and second sample fixed plate 5 are connected into a set and fastened respectively;Then, the shaped composite track plate test piece is placed into 60 ℃ constant temperature condition electric heating air drying oven and preheated for 6-8 hours, after preheating, the composite track plate test piece is taken out, and the upper layer and the lower layer are placed on first support 1 and second support 4, then the distance between first support 1 and second support 4 is adjusted to make the middle layer of the composite track plate test piece under shear load in a suspended state;Then, first support 1 and second support 4 are fixed, so that the distance between first support 1 and second support 4 is limited;After that, shear pressure head 3 is connected with universal testing machine by means of a pin, and is fastened;Shear pressure head 3 is slowly lowered to contact the middle layer, the position of the composite track plate test piece and first support 1 and second support 4 is adjusted to ensure that the composite track plate test piece and first support 1 and second support 4 are parallel in the vertical direction;The loading rate is 10 mm / min, the shear load is applied to the middle layer, first sample fixed plate 2 and second sample fixed plate 5 limit the arching of the composite track plate test piece in the horizontal direction during the stress process, until the interlayer of the composite track plate test piece produces relative displacement and shear failure, and the test is stopped;After the test is completed, the distance between first support 1 and second support 4 is adjusted, and the composite track plate test piece is taken out.

[0017] Therefore, compared with the prior art, the utility model discloses a kind of test devices for evaluating basalt fiber rib mesh asphalt pavement shear strength, without customizing special instrument equipment, can save cost, operability is strong, when carrying out experiment, composite track plate type test piece can be used, can eliminate test piece size influence, simulate actual stress condition, to improve test precision.

[0018] Example 2

[0019] As Figure 1As shown, unlike Embodiment 1, in Embodiment 2, a test device of the present invention for evaluating the shear strength of basalt fiber reinforced asphalt pavement is provided with a pair of transmission rods 8 on the inner long side of the first support 1, and the second support 4 is sleeved on the pair of transmission rods 8. The outer sides of the two short sides of the first support 1 are provided with first fixed seats 11, and the outer sides of the two short sides of the second support 4 are provided with second fixed seats 7. A slide rail 9 is provided between the first fixed seat 11 and the corresponding second fixed seat 7, and a locking bolt 10 is provided on the second fixed seat 7.

[0020] By sliding the second support 4 along the two transmission rods 8 and two slide rails 9, the distance between the first support 1 and the second support 4 can be adjusted, placing the middle layer of the composite rutted plate specimen under shear load in a suspended state. Then, the slide rails 9 are fixed inside the second fixed seat 7 by inserting the locking bolt 10, thus fixing the distance between the first support 1 and the second support 4. After the test, the locking bolt 10 is adjusted to increase the distance between the first support 1 and the second support 4, and the composite rutted plate specimen is removed.

[0021] Example 3

[0022] like Figure 1 As shown, unlike Example 1, in the test device of this utility model for evaluating the shear strength of basalt fiber reinforced asphalt pavement in Example 3, the first support 1 and the first sample fixing plate 2, and the second support 4 and the second sample fixing plate 5 are connected by bolts 6, which facilitates disassembly and assembly and makes operation more convenient.

[0023] The foregoing description illustrates and describes several preferred embodiments of the utility model. However, as previously stated, it should be understood that the utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the utility model concept described herein through the foregoing teachings or the technology or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the utility model should be within the protection scope of the appended claims.

Claims

1. A test device for evaluating the shear strength of a basalt fiber grid reinforced asphalt pavement, characterized by, The application relates to a shearing device for testing the shearing strength of a sample, which comprises a first support (1) and a second support (4), the first support (1) and the second support (4) are oppositely arranged and can be arranged close to each other or away from each other, the outer long side of the first support (1) is provided with a first sample fixing plate (2), the outer long side of the second support (4) is provided with a second sample fixing plate (5), a shearing pressure head (3) is arranged above the first support (1) and the second support (4), and the shearing pressure head (3) is located between the first sample fixing plate (2) and the second sample fixing plate (5).

2. The test device for evaluating the shear strength of basalt fiber grid reinforced asphalt pavement according to claim 1, characterized in that, The inner long side of the first support (1) is provided with a pair of transmission rods (8), the second support (4) is sleeved on the pair of transmission rods (8), the outer sides of the two short sides of the first support (1) are provided with first fixing bases (11), the outer sides of the two short sides of the second support (4) are provided with second fixing bases (7), the first fixing bases (11) and the corresponding second fixing bases (7) are provided with sliding rails (9), and the second fixing bases (7) are provided with locking bolts (10).

3. The test device for evaluating the shear strength of basalt fiber grid reinforced asphalt pavement according to claim 2, characterized in that, The first support (1) and the first sample fixing plate (2) and the second support (4) and the second sample fixing plate (5) are connected through bolts (6).

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