CN110702535A - Test device suitable for indoor multi-angle oblique shearing of ultrathin wearing layer asphalt mixture - Google Patents
Test device suitable for indoor multi-angle oblique shearing of ultrathin wearing layer asphalt mixture Download PDFInfo
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- CN110702535A CN110702535A CN201911015812.2A CN201911015812A CN110702535A CN 110702535 A CN110702535 A CN 110702535A CN 201911015812 A CN201911015812 A CN 201911015812A CN 110702535 A CN110702535 A CN 110702535A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The utility model provides a test device suitable for indoor multi-angle oblique shearing of ultra-thin wearing layer bituminous mixture, includes: a stress test platform; the height adjusting pieces are arranged in the stress test platform, and the height adjusting pieces are arranged oppositely; the rotary fixing piece is movably arranged on the height adjusting piece; a variable angle jig formed on an end surface of the rotary fixing member; and the sensing support piece is arranged at the joint of the height adjusting piece and the rotating fixing piece. The invention solves the adverse effects of complicated test operation, stress concentration in the oblique shear test process of the asphalt mixture and the like in the prior art.
Description
Technical Field
The invention relates to the technical field of material testing, in particular to a testing device suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultra-thin wearing layer.
Background
With the rapid development of the traffic industry in China, the utilization rate of the asphalt pavement is more and more wide, the service life of the pavement is shortened, the driving safety is seriously influenced, and the rutting becomes a main disease of the asphalt pavement. The prior rutting in China is mainly the result of plastic flow of asphalt mixture under the action of shear stress. Under the action of wheel load, non-uniform load generates larger shear stress in a pavement surface layer, and the shear resistance of the asphalt mixture is not considered in the design process, which is one of the root causes of rutting on the pavement. In the past, a stress mode of a test piece of a triaxial test can better simulate the stress state of a pavement material under the action of load, but the principle of the test piece is derived from soil mechanics, the test principle, the assumed condition, the material parameters and the like are different, the test piece is not completely suitable for asphalt mixtures, the test operation is complex, and the application is less.
In addition, at present, a uniform test method for evaluating the interlayer shearing resistance of the asphalt concrete pavement does not exist, and the shear test methods for evaluating the interlayer bonding layer shearing resistance at home and abroad mainly comprise a direct shear test and a diagonal shear test. The shearing angle of the oblique shearing test is fixed, the positive pressure and the shearing direction component force are in a fixed proportion, the shearing stress is increased along with the increase of the positive pressure according to the coulomb formula, and the obtained test result cannot well reflect the bonding performance of the bonding layer.
In conclusion, the material testing technology in the prior art has the technical problems of complex testing operation and poor testing effect.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a test device suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultra-thin wearing layer, which is used for solving the technical problems of complex test operation and poor test effect in the prior art. In order to achieve the above objects and other related objects, the present invention provides a testing apparatus suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultra-thin wearing layer, comprising: the stress test platform is used for installing an experimental device in a stress state; the height adjusting pieces are arranged in the stress test platform, the height adjusting pieces are arranged oppositely, and the height adjusting pieces are used for adjusting the rotating fixing pieces to contact fixing positions; the rotary fixing piece is movably arranged on the height adjusting piece and is used for adjusting the stress angle of the tested piece; the angle-variable clamp is arranged on the end face of the rotary fixing piece and used for fixing the tested piece and adjusting the stress angle of the tested piece; and the sensing support piece is arranged between the height adjusting piece and the rotary fixing piece, and is used for acquiring and acquiring real-time stress state data of the tested piece and testing the stress state of the tested piece.
In one embodiment of the present invention, a stress testing platform includes: the platform frame body is fixed outside the stress test platform; the height adjusting piece, the rotating fixing piece, the variable angle fixture and the sensing supporting piece are arranged in the temperature adjusting test box body.
In one embodiment of the present invention, a temperature-controlled test chamber includes: the height stress adjusting interface is arranged between the temperature adjusting test box body and the height adjusting piece; and the sensing interface is arranged between the temperature-adjusting test box body and the sensing support piece.
In one embodiment of the present invention, the height adjusting member includes: the height adjusting controller is connected with the height stress adjusting interface; the height adjusting driving device penetrates through the temperature adjusting test box body and is connected with the height adjusting controller; and the height adjusting rod is connected with the height adjusting driving device.
In one embodiment of the present invention, a rotation fixing member includes: a rotary seat formed at an adjustment end of the height adjusting member; and the rotating sliding piece is arranged between the rotating seat and the variable angle clamp.
In one embodiment of the present invention, a rotary slider includes: a rotary angle slide rail; the plurality of rotary angle pulleys are arranged in the rotary angle slide rails; and the sliding fixing parts are arranged at two ends of the rotary angle sliding rail.
In one embodiment of the present invention, a variable angle jig includes: a plurality of clamping blocks connected with the rotary sliding piece; and a test piece groove formed on the contact end surface of the clamping block.
In one embodiment of the present invention, the sensing support comprises: a support bar; the sensor is arranged between the supporting rod and the rotary fixing piece;
in an embodiment of the present invention, the supporting rod includes a sliding support disposed between the sensor and the rotating fixing member.
As mentioned above, the test device suitable for indoor multi-angle oblique shearing of the asphalt mixture of the ultrathin wearing layer provided by the invention has the following beneficial effects:
the invention relates to a test device suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultrathin wearing layer, which comprises a test pressure head, a variable-angle oblique shearing clamp, a sensor and the like. The device has the advantages of simple structure, convenient operation process and easy determination of test parameters, and is suitable for the angle-variable shear test of the asphalt mixture of the ultrathin wearing layer.
Meanwhile, the test device can enable the stress of the test piece to be more uniform in the test process, reduce the stress concentration phenomenon of the edge of the clamp on the asphalt mixture test piece, and enable the test result to reflect the shearing stress state of the asphalt mixture in the actual ultrathin wearing layer.
Drawings
FIG. 1 shows a schematic structural diagram of a test device suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultra-thin wearing layer.
Fig. 2 is a schematic structural diagram of the rotating fixing member 3 in fig. 1 in an embodiment.
Fig. 3 is a schematic structural diagram of the variable angle clamp 4 in fig. 1 in an embodiment.
Fig. 4 is a schematic structural diagram of the sensing support 5 in fig. 1 in an embodiment.
Description of the element reference numerals
1 stress test platform
2 height adjusting part
3 rotating fixing piece
4 become angle anchor clamps
5 sensing support
11 platform frame
12 temp. regulating test box
21 height adjusting controller
22 height adjustment drive
23 height adjusting rod
31 rotating base
32 rotary slide
41 clamping block
42 test piece groove
51 support rod
52 sensor
121 height stress adjustment interface
122 sensing interface
321 rotation angle slide rail
322 rotary angle pulley
323 sliding fastener
511 sliding support
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures shown in the drawings and described herein are only for the purpose of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that the present invention is not limited thereto. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a testing apparatus suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultra-thin wearing layer according to the present invention, as shown in fig. 1, the testing apparatus suitable for indoor multi-angle oblique shearing of an asphalt mixture of an ultra-thin wearing layer comprises a stress testing platform 1, a height adjusting member 2, a rotating fixing member 3, a variable angle fixture 4 and a sensing support member 5, the stress testing platform 1 is used for mounting a testing apparatus in a stressed state, in an embodiment, the stress testing platform 1 such as a hydraulic universal testing machine may comprise, for example, a height adjusting rod, a testing environment box, a rotating pulley, a rotating fixing member, a test cell, a variable angle oblique shearing fixture, a sliding support, a sensor, a base support of the hydraulic universal testing machine, and the like, in an embodiment, a tested piece is placed on the hydraulic universal testing machine to provide multi-angle variable shear, and recording relevant stress-strain data in real time. The stress sensing data processing can be carried out by connecting a preset interface with a computer terminal, for example, so as to visually judge the change of the stress state of the test piece, and in one embodiment, the stress sensing data processing device is suitable for the damage process of the test piece measured by a test device for indoor multi-angle oblique shearing of the asphalt mixture of the ultrathin wearing layer, can reflect the essential change generated by the shearing strength of the material and can reflect the damage mechanism of the material; the height adjusting pieces 2 are arranged in the stress test platform 1, the height adjusting pieces 2 are arranged oppositely, and the height adjusting pieces 2 are used for adjusting the rotary fixing pieces to the contact fixing positions; the rotary fixing piece 3 is movably arranged on the height adjusting piece 2 and is used for adjusting the stress angle of a tested piece such as an asphalt mixture of an ultra-thin wearing layer; the angle-variable clamp 4 is mounted on the end face of the rotary fixing piece 3, the angle-variable clamp 4 is used for fixing the tested piece and adjusting the stress angle of the tested piece, in one embodiment, the angle-variable clamp 4 can adjust the oblique shearing angle of the tested piece in a manner of adjusting a rotary pulley, for example, in one embodiment, the angle-variable clamp 4 can adopt a structure of an upper part and a lower part, for example, the angle of the tested piece and the horizontal plane can be adjusted by adjusting the rotary pulley, for example, in one embodiment, the adjustment angle of the tested piece can be 0-90 degrees; the sensing support member 5 is disposed between the height adjusting member 2 and the rotating fixing member 3, the sensing support member 5 is used for acquiring and acquiring real-time stress state data of the tested piece so as to test the stress state of the tested piece, in one embodiment, the height adjusting rod and the sensing support member 5, such as a base pillar of a testing machine, can be disposed on the same vertical axis, and can be used for testing and evaluating, for example, the adhesive strength or the shear resistance of the asphalt mixture itself, and the like between different material layers in the tested piece, such as an ultra-thin wearing layer asphalt pavement.
Referring to fig. 1, the stress testing platform 1 includes a platform frame 11 and a temperature-adjusting testing box 12, the platform frame 11 is fixed outside the stress testing platform 1, in an embodiment, a testing machine can be fixed by using the platform frame 11, for example, a tested piece can be a cubic asphalt mixture test piece rolled by using a laboratory track plate, a cubic test piece with a prefabricated size and multiple faces can be cut into a long, wide and high cubic test piece, and an up-down angle-variable oblique-shear clamp is fixed on an upper support and a lower support of a hydraulic universal testing machine; the height adjusting part 2, the rotating fixing part 3, the angle-changing clamp 4 and the sensing support part 5 are arranged in the temperature-adjusting test box body 12, in one embodiment, the temperature-adjusting test box body 12 such as a test environment box can adjust the test temperature in the box body according to test requirements, in one embodiment, after the strength of the bonding agent is formed to a preset range, the upper pressure head and the lower pressure head of the lifting hydraulic universal testing machine are adjusted to be arranged in the middle position of the temperature-adjusting test box body 12, the temperature of the environment box is adjusted to be a test temperature range to a specific temperature range according to the test temperature, and the temperature is kept for a preset time.
Referring to fig. 1, the temperature-adjusting test box 12 includes a height stress adjusting interface 121 and a sensing interface 122, the height stress adjusting interface 121 is installed between the temperature-adjusting test box 12 and the height adjusting member 2, in an embodiment, a hydraulic universal testing machine can be used to provide pressure through a support rod, for example, a variable-angle fixture 4 such as a variable-angle oblique-shear fixture can be used to change the angle of force through manual adjustment, for example, and a sensor such as a stress sensor can be fixed on the hydraulic universal testing machine to output the mechanical parameters related to the test piece in the test in real time; and a sensing interface 122, which is arranged between the temperature-adjusting test box body 11 and the sensing support 5, wherein in one embodiment, the size and the speed of the load, the control mode of stress and strain and the data acquisition mode in the test are controlled by a hydraulic universal tester and the data are output.
Referring to fig. 1, the height adjusting member 2 includes a height adjusting controller 21, a height adjusting driving device 22 and a height adjusting rod 23, the height adjusting controller 21 is connected to the height stress adjusting interface 121, in an embodiment, the testing device suitable for indoor multi-angle oblique shearing of the asphalt mixture in the ultra-thin wearing course can perform an indoor detection test through the height adjusting controller 21 and the rotating fixing member 3, can control the change of the shearing angle to simulate the actual shearing process of the actual road surface, and can record and analyze the shearing test result in time; the height adjusting driving device 22 penetrates through the temperature adjusting test box body 12 and is connected with the height adjusting controller 21; and a height adjustment lever 23 connected to the height adjustment driving means 22.
Referring to fig. 2, fig. 2 is a schematic diagram showing a specific structure of the rotating fixing member 3 in fig. 1 in an embodiment, as shown in fig. 2, the rotating fixing member 3 includes a rotating seat 31 and a rotating slider 32, the rotating seat 31 is formed at an adjusting end of the height adjusting member 2, and in an embodiment, the angle-variable furniture 4, such as an angle-variable angle scissors clamp, can be divided into two parts, such as an upper end fixing clamp and a lower end fixing clamp, which can be composed of a sliding support and an angle rotator, for example; the rotary sliding part 32 is arranged between the rotary seat 31 and the angle-variable clamp 4, in one embodiment, the rotary pulley slides the angle-variable shear test clamp according to the angle requirement of the angle-variable shear test, but the consistency of the axis of the angle-variable shear clamp and the height adjusting rod of the hydraulic universal testing machine is not changed, in the embodiment, the stress angle of the other test piece can be adjusted by rotating the rotary sliding part 32 according to the actual road surface condition, so that the angle-variable shear test is carried out, and the damage form of the test piece under different shear angles is analyzed.
Referring to fig. 2, the rotating sliding member 32 includes a rotating angle sliding rail 321, a plurality of rotating angle pulleys 322 and a sliding fixing member 323, the rotating angle sliding rail 321; the plurality of spiral angle pulleys 322 are disposed in the spiral angle sliding rails 321, and in one embodiment, the shear strength refers to the limit capability of the asphalt mixture to resist shearing caused by an external load. The asphalt mixture is a viscoelastic material, and shows obvious plasticity under the condition of high temperature, the shearing resistance of the asphalt mixture is weakened as the temperature rises and the pavement deformation is larger as the temperature rises, and under the action of wheel load, non-uniform load generates larger shearing stress on a concrete surface layer. If the high-temperature stability of the asphalt mixture is insufficient, the pavement can generate larger shearing deformation. The shear resistance index of the existing asphalt mixture in China is not considered in the design and detection processes, and once the shear stress borne by the material is greater than or close to the shear strength of the material, the material is subjected to shear failure; and a sliding fixture 323 disposed at both ends of the pivoting angle sliding rail 321, wherein in one embodiment, the sliding fixture, such as a pivoting fixture, can be used to tighten a nut behind the sliding miter clamp according to, for example, a miter test angle to fix the upper clamp angle, and in one embodiment, the pivoting angle pulley 322 can be adjusted to the tested miter shear angle according to a test requirement, and the sliding fixture 323, such as the pivoting fixture, can be tightened to fix the test angle, and then the computer is adjusted to set the load loading rate.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the angle-changing fixture 4 in fig. 1 in an embodiment, as shown in fig. 3, the angle-changing fixture 4 includes a plurality of clamping blocks 41 and a specimen slot 42, the plurality of clamping blocks 41 are connected to a rotating sliding member 323, in an embodiment, the clamping block 41 may be, for example, an upper end fixing fixture and a lower end fixing fixture for fixing a specimen, and the upper end fixing fixture and the lower end fixing fixture may be configured in the same manner, and in an embodiment, a test specimen may be placed between, for example, the upper end fixing fixture and the lower end fixing fixture; a test piece groove 42 formed on the contact end surface of the clamping block 41, in one embodiment, the size of the test piece groove 42 can be matched with the size of a tested piece such as the asphalt mixture of the ultra-thin wearing layer, in one embodiment, the variable angle clamp 4 such as the variable angle oblique shearing clamp of the test device suitable for multi-angle oblique shearing in an ultra-thin wearing layer asphalt mixture chamber can be divided into an upper clamp pressure head and a lower clamp pressure head with the same size, in this embodiment, a certain amount of adhesive can be coated in the test piece groove of the test device suitable for multi-angle oblique shearing in the ultra-thin wearing layer asphalt mixture chamber before the test piece is put in the asphalt mixture chamber to fix the test piece, in one embodiment, a certain amount of epoxy resin adhesive (or other adhesives can be used for fixing) can be coated on the side wall of the test piece groove 42, the cubic asphalt mixture test piece is put in the test piece groove 42, the height adjusting rod of the, so that it is tightly coupled to the specimen slot 42.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the sensing support 5 in fig. 1 in an embodiment, as shown in fig. 4, the sensing support 5 includes a support rod 51, a sensor 52, and a support rod 51; a sensor 52 installed between the support rod 51 and the rotary fixing member 3, in one embodiment, the sensor 52 such as a stress-strain sensor may be connected to a computer to record the variation of parameters such as stress and strain of the test piece in real time.
Referring to fig. 4, the supporting rod 51 includes a sliding support 511, which is disposed between the sensor 52 and the rotating fixture 3, in an embodiment, the sliding support 511 may be used to, for example, keep the axes of the upper and lower clamps consistent, in an embodiment, the sliding support is used to ensure that the contact surface between the hydraulic universal testing machine and the variable-angle oblique-shearing clamp is a horizontal plane, so that the stress state of the test piece clamp is always vertical, and the defect of stress concentration at the edge of the test piece caused by the clamp in the past is eliminated, in an embodiment, a testing method suitable for multi-angle oblique shearing in an ultra-thin wearing course asphalt mixture chamber includes: s1, mounting the testing device suitable for indoor multi-angle oblique shearing of the ultrathin wearing layer asphalt mixture on a stress testing platform, wherein before testing, the axis of an up-down variable-angle clamp of a hydraulic universal testing machine can be kept consistent with a height adjusting rod of the hydraulic universal testing machine and a lower support of the hydraulic universal testing machine, related testing parameters such as stress and strain in the loading process are recorded in real time through a sensor, and in one embodiment, a tested piece is placed on the hydraulic universal testing machine, so that the shearing stress with multi-angle change is provided, and related stress-strain data are recorded in real time. The stress sensing data processing can be carried out by connecting a preset interface with a computer terminal, for example, so as to visually judge the change of the stress state of the test piece, and in one embodiment, the stress sensing data processing device is suitable for the damage process of the test piece measured by a test device for indoor multi-angle oblique shearing of the asphalt mixture of the ultrathin wearing layer, can reflect the essential change generated by the shearing strength of the material and can reflect the damage mechanism of the material; s2, adjusting the plurality of rotary fixing members to contact fixing positions by using height adjusting members, wherein in one embodiment, a vertical load can be provided to the tested piece by using, for example, a hydraulic universal testing machine, in one embodiment, the height of the clamp can be changed by using, for example, a height adjusting rod of the hydraulic universal testing machine, in one embodiment, the height adjusting rod and the sensing support member 5, such as a pedestal pillar of the testing machine, can be arranged on the same vertical axis, and can be used for testing and evaluating, for example, the adhesive strength between different material layers in the tested piece, such as an ultra-thin wearing course asphalt pavement, or the shearing resistance of the asphalt mixture; s3, fixing the tested piece by a variable angle clamp; s4, rotating the rotating fixing piece to adjust the stress angle of the tested piece, wherein in one embodiment, the angle-changing clamp 4 can adjust the oblique shearing angle of the tested piece by adopting a mode of adjusting a rotating pulley, for example, in one embodiment, the angle-changing clamp 4 can adopt a structure of an upper part and a lower part, for example, the angle-changing clamp can adjust the angle between the tested piece and the horizontal plane by adjusting the rotating pulley, for example, the adjusting angle of the tested piece can be 0-90 degrees; and S5, acquiring real-time stress state data of the tested piece by the sensing support piece to test the stress state of the tested piece, wherein in one embodiment, the test device suitable for indoor multi-angle oblique shearing of the asphalt mixture of the ultrathin wearing layer can adopt a hydraulic universal testing machine to adjust the displacement, the load and the like of the tested piece through a computer.
As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Also, as used in the description herein and throughout the claims that follow, unless otherwise indicated, the meaning of "in …" includes "in …" and "on … (on)".
The above description of illustrated embodiments of the invention, including what is described in the abstract of the specification, is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. While specific embodiments of, and examples for, the invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention, as those skilled in the relevant art will recognize and appreciate. As indicated, these modifications may be made to the present invention in light of the foregoing description of illustrated embodiments of the present invention and are to be included within the spirit and scope of the present invention.
The invention relates to a device for carrying out indoor multi-angle shearing test on asphalt mixture paved on an ultra-thin wearing layer by adopting a hydraulic universal testing machine, which comprises a testing machine pressure head, a variable-angle oblique shearing clamp, a sensor and the like. The device has the advantages of simple structure, convenient operation process and easy determination of test parameters, and is suitable for the angle-variable shear test of the asphalt mixture of the ultrathin wearing layer.
Meanwhile, the invention can enable the stress of the test piece to be more uniform in the test process, and reduce the stress concentration phenomenon of the edge of the clamp on the asphalt mixture test piece, so that the test result can reflect the shearing stress state of the asphalt mixture in the actual ultrathin wearing layer better.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a test device suitable for indoor multi-angle oblique shearing of ultra-thin wearing layer bituminous mixture which characterized in that includes:
the stress test platform is used for mounting the multi-angle test device;
the height adjusting pieces are arranged in the stress test platform, and the height adjusting pieces are arranged oppositely;
the rotary fixing piece is movably arranged on the height adjusting piece and is used for adjusting the stress angle of the tested piece;
the angle-variable clamp is arranged on the end face of the rotary fixing piece and used for fixing the tested piece and adjusting the stress angle of the tested piece;
and the sensing support piece is arranged between the height adjusting piece and the rotary fixing piece, and is used for acquiring and acquiring real-time stress state data of the tested piece and testing the stress state of the tested piece.
2. The test device suitable for indoor multi-angle oblique shearing of the asphalt mixture of the ultrathin wearing course as claimed in claim 1, wherein the stress test platform comprises:
the platform frame body is fixed outside the stress test platform;
the temperature-adjusting test box body is arranged on the inner wall of the stress test platform, and the height adjusting piece, the rotary fixing piece, the angle-changing clamp and the sensing support piece are arranged in the temperature-adjusting test box body.
3. The test device suitable for indoor multi-angle oblique shearing of ultra-thin wearing course bituminous mixture according to claim 2, wherein the temperature adjusting test box body comprises:
the height stress adjusting interface is arranged between the temperature adjusting test box body and the height adjusting piece;
and the sensing interface is arranged between the temperature-adjusting test box body and the sensing support piece.
4. The testing device suitable for indoor multi-angle oblique shearing of asphalt mixture of ultra-thin wearing courses according to claim 1, wherein the height adjusting piece comprises:
the height adjusting controller is connected with the height stress adjusting interface;
the height adjusting driving device penetrates through the temperature adjusting test box body and is connected with the height adjusting controller;
and the height adjusting rod is connected to the height adjusting driving device.
5. The test device suitable for indoor multi-angle oblique shearing of asphalt mixture of ultra-thin wearing courses according to claim 4, wherein the rotary fixing member comprises:
a rotary seat formed at an adjustment end of the height adjusting member;
and the rotating sliding piece is arranged between the rotating seat and the angle-variable clamp.
6. The test device suitable for indoor multi-angle oblique shearing of asphalt mixture of ultra-thin wearing courses according to claim 5, wherein the rotary sliding part comprises:
a rotary angle slide rail;
the plurality of rotary angle pulleys are arranged in the rotary angle slide rails;
and the sliding fixing parts are arranged at two ends of the rotary angle sliding rail.
7. The test device suitable for indoor multi-angle oblique shearing of the asphalt mixture of the ultrathin wearing course as claimed in claim 1, wherein the angle-variable clamp comprises:
a plurality of clamping blocks connected with the rotary sliding piece;
and a test piece groove formed on the contact end surface of the clamping block.
8. The test device suitable for indoor multi-angle oblique shearing of asphalt mixture of ultra-thin wearing courses according to claim 1, wherein the sensing support comprises:
a support bar;
a sensor mounted between the support bar and the rotational fixing member.
9. The testing apparatus suitable for indoor multi-angle diagonal shear of bituminous mixture in ultra-thin wearing courses as claimed in claim 8, wherein said supporting rod comprises a sliding support disposed between said sensor and a rotary fixture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911015812.2A CN110702535A (en) | 2019-10-24 | 2019-10-24 | Test device suitable for indoor multi-angle oblique shearing of ultrathin wearing layer asphalt mixture |
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| CN201911015812.2A CN110702535A (en) | 2019-10-24 | 2019-10-24 | Test device suitable for indoor multi-angle oblique shearing of ultrathin wearing layer asphalt mixture |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112710564A (en) * | 2020-12-16 | 2021-04-27 | 中国科学院地质与地球物理研究所 | Fracture surface variable-angle shear test system |
| CN114109457A (en) * | 2021-10-21 | 2022-03-01 | 湖南科技大学 | Coal seam angle-variable shearing device with synchronous self-adaptive cutting cushion blocks |
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