CN115200973A - Bituminous mixture two-way tension-compression equal proportion loading intensity experimental apparatus - Google Patents
Bituminous mixture two-way tension-compression equal proportion loading intensity experimental apparatus Download PDFInfo
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- CN115200973A CN115200973A CN202210786450.2A CN202210786450A CN115200973A CN 115200973 A CN115200973 A CN 115200973A CN 202210786450 A CN202210786450 A CN 202210786450A CN 115200973 A CN115200973 A CN 115200973A
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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
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0026—Combination of several types of applied forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a bidirectional tension-compression equal-proportion loading strength experimental device for an asphalt mixture, which comprises a bottom plate, wherein a groove is formed in the bottom plate, an asphalt mixture test piece is arranged in the groove, and a lifting device is arranged at the lower end of the groove; an upper cover plate is arranged above the bituminous mixture trial-made piece, and when the upper cover plate is used for pressing the bituminous mixture trial-made piece, the upper cover plate moves downwards to be under the action of the linkage piece and on the pull rod so as to transversely pull the bituminous mixture trial-made piece; the pull rod is arranged on the slide rail, the support rod is inserted in the upper cover plate, and the middle of the upper end of the upper cover plate is provided with a pressing force application part. The device is ingenious in design, the asphalt mixture test piece can be simultaneously pulled and pressed, and vertical force application enables the asphalt mixture test piece to be transversely pulled through the linkage piece, namely the asphalt mixture test piece is simultaneously subjected to loads in two different directions, and is vertically pressed and transversely pulled; and the size of the linkage piece is changed, so that the transverse tension is changed, and the effect of changing the compression-tension stress ratio is achieved.
Description
Technical Field
The invention relates to the technical field of asphalt mixture correlation, in particular to an experimental device for bidirectional tension-compression equal-proportion loading strength of an asphalt mixture.
Background
Most high-grade highways in China adopt asphalt pavements. The asphalt pavement is exposed to the external environment for a long time and is subjected to repeated action of wheel load, and is in a complex stress state for a long time, and the structural strength of the pavement is reduced along with the increase of the repeated action times of the load. The road surface shows a stress state of simultaneous action of bidirectional tension and compression under the action of wheel load. In the existing asphalt mixture strength test method, an asphalt mixture test piece of a splitting strength test is in a two-dimensional stress state. However, the conventional split strength test has the following disadvantages: firstly, the edge of the clamp applying pressure is determined to crack firstly, which is inconsistent with the assumption of a cracking strength calculation formula (which assumes that the center of the test piece cracks firstly); secondly, the bidirectional stress ratio received at the circle center of the asphalt mixture test piece is fixed, and the actual variable bidirectional stress ratio condition of the road surface cannot be reflected.
Patent publication (publication) No.: CN201110404400.5, applicant (patentee): university of south China marble. The abstract content of the patent is as follows: the invention provides a clamp and a test method for a bidirectional alternate splitting test of a road material cylinder test piece, wherein the clamp comprises a front end surface unit and a rear end surface unit which have the same structure and are spaced, and a connecting piece between the two end surface units; the front end face unit and the rear end face unit respectively comprise an upper wing plate, a lower wing plate and eight connecting plates; the connecting piece comprises an upper pressing strip, a lower pressing strip, side pressing strips, a top plate and a bottom plate. After the clamp is fixed, the clamp is connected with a loading device; then, placing the cylindrical test piece in a clamp, and enabling two ends of the test piece to be spaced by equal distances; and circularly applying compression and tension loads in the vertical direction of the clamp top plate, and enabling the test piece to generate tension and compression deformation, thereby obtaining a tension-compression alternating bidirectional fracture fatigue test result. The clamp realizes the alternate compression-tension loading of the test piece in the vertical and horizontal directions, obtains the actual fatigue resistance of the pavement material under the loading condition, and can be used for researching the expansion and healing rules of cracks in the material.
The patent in the comparison document is the alternate compression-tension loading of the vertical and horizontal directions of the test piece (only one direction is loaded at any time), and the compression-tension stress ratio is fixed, belonging to a fatigue test device, which can not make the asphalt mixture test piece simultaneously receive the bidirectional tension-compression load, and can not ensure that the center of the test piece is cracked first. The technical scheme of the patent is not disclosed in the comparison documents, the novelty of the patent cannot be damaged, and the creativity of the patent cannot be damaged by the combination of the comparison documents.
Disclosure of Invention
The invention aims to solve the problems, and provides an experimental device for the bidirectional tension-compression equal-proportion loading strength of an asphalt mixture, which is ingenious in design, can simultaneously tension and compress an asphalt mixture test piece, and vertically applies force to enable the asphalt mixture test piece to be transversely pulled through a linkage piece, namely, the asphalt mixture test piece is simultaneously subjected to loads in two different directions, and is vertically compressed and transversely pulled; and the size of the linkage piece is changed, so that the transverse tension is changed, and the effect of changing the compression-tension stress ratio is achieved.
In order to realize the purpose, the invention adopts the technical scheme that: the asphalt mixing test bed comprises a bottom plate, wherein a groove is formed in the bottom plate, an asphalt mixing material test piece is arranged in the groove, and a lifting device is arranged at the lower end of the groove; an upper cover plate is arranged above the bituminous mixture trial-made piece, and when the upper cover plate is used for applying pressure to the bituminous mixture trial-made piece, the upper cover plate moves downwards to be on the pull rod under the action of the linkage piece so as to transversely pull the bituminous mixture trial-made piece; the pull rod is arranged on the slide rail, the second support rod is inserted into the upper cover plate in a penetrating mode, and the middle of the upper end of the upper cover plate is provided with a pressing force application portion.
Furthermore, the linkage piece is set to be respectively hinged with the upper cover plate and the pull rod.
Furthermore, one end of the pull rod is connected with the bituminous mixture trial-production piece through a connecting block, and the other end of the pull rod is provided with a limiting block.
Furthermore, the linkage piece comprises a first rack, the first rack is meshed with the first gear, the side end of the first gear is meshed with the second gear, the lower end of the second gear is meshed with the third gear, and the lower end of the third gear is meshed with the second rack.
Furthermore, the upper end of the first rack is arranged on two sides of the lower end of the upper cover plate; the second gear, the third gear and the first gear are arranged on the bottom plate through a first vertical rod, a second vertical rod and a connecting shaft respectively; the second rack is arranged in the groove of the pull rod.
Further, both ends of the upper cover plate are provided with notches for preventing interference with the first gear.
Furthermore, the asphalt mixture test piece is a cylinder with four edges cut once, and two sides of the asphalt mixture test piece are connected with the connecting blocks in a sticking manner.
Furthermore, the pull rod consists of a first pull rod main body and a second pull rod main body, and one ends of the first pull rod main body and the second pull rod main body are respectively arranged in screw sleeves.
Furthermore, the lower extreme of slide rail is provided with first bracing piece, and the lower extreme setting of first bracing piece is on the bottom plate.
The invention has the beneficial effects that:
1. the invention provides an experimental device for the equal proportional loading strength of the bidirectional tension and compression of an asphalt mixture, which is ingenious in design, can simultaneously tension and compress an asphalt mixture test piece, vertically applies force to enable the asphalt mixture test piece to be transversely pulled through a linkage piece, namely, the asphalt mixture test piece is simultaneously subjected to loads in two different directions, and is vertically compressed and transversely pulled; and the size of the linkage piece is changed, so that the transverse tension is changed, and the effect of changing the compression-tension stress ratio is achieved.
2. According to the invention, the transverse tensile force of the asphalt mixture test piece is derived from the vertical pressure of the test piece (the direction and the size are changed through the linkage piece), so that the equal-proportion loading of bidirectional loads is realized; meanwhile, the tension-compression and compression-tension stress ratio is adjustable, and a real wheel rolling road stress scene is simulated.
3. According to the invention, 4 planes for directly bearing the load are obtained by cutting the asphalt mixture test piece, so that the effect of ensuring that the center of the test piece is cracked firstly is achieved.
Drawings
FIG. 1 is an elevation view of a linkage of the present invention in the configuration of a connecting rod.
Fig. 2 is a top view of the structure of the present invention in which the linkage is a connecting rod.
Fig. 3 is an elevational view of the present invention construction wherein the linkage is a rack and pinion arrangement.
Fig. 4 is a top view of the present invention wherein the linkage is a rack and pinion.
Fig. 5 is a schematic view of the upper cover plate when the linkage is a rack and pinion.
FIG. 6 is a schematic view of the connection between the pull rod and the threaded sleeve in the structure of the present invention.
FIG. 7 is a schematic view of a cut asphalt mixture test piece in the structure of the present invention.
The text labels in the figures are represented as: 1. a base plate; 2. a first support bar; 3. a limiting block; 4. a pull rod; 5. a slide rail; 6. a third gear; 7. a second gear; 8. a first gear; 9. a second support bar; 10. an upper cover plate; 11. a first rack; 12. testing the asphalt mixture; 13. connecting blocks; 14. A threaded sleeve; 15. a second rack; 16. a first vertical bar; 17. a connecting rod; 18. a second main bar; 101. A groove; 401. a first tie rod body; 402. a second draw bar body; 1001. and (6) cutting.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
As shown in fig. 1 to 7, the specific structure of the present invention is: the device comprises a bottom plate 1, wherein a groove 101 is formed in the bottom plate 1, an asphalt mixture test piece 12 is arranged in the groove 101, and a lifting device is arranged at the lower end of the groove 101; an upper cover plate 10 is arranged above the bituminous mixture test piece 12, and when the upper cover plate 10 is used for applying pressure to the bituminous mixture test piece 12, the upper cover plate 10 moves downwards to be on the pull rod 4 under the action of the linkage piece so as to generate transverse tension for realizing bidirectional load equal-proportion loading on the bituminous mixture test piece 12; the pull rod 4 is arranged on the slide rail 5, the second support rod 9 is inserted on the upper cover plate 10, and the middle part of the upper end of the upper cover plate 10 is provided with a pressing force application part. The pressing force application part is an MTS pressing machine.
The working principle is as follows: firstly, fixing the pull rods 4 at two sides and the asphalt mixture test piece 12 outside, and then installing the pull rods and the asphalt mixture test piece on the groove 101 on the bottom plate 1 of the experimental device; when pressure is applied to the middle of the upper cover plate 10, the upper cover plate 10 moves downwards to be on the pull rod 4 under the action of the linkage piece, so that the asphalt mixture test piece 12 is transversely pulled; the pull rod 4 slides on the slide rail 5, so that the pressure ratio of the pressed asphalt mixture test piece 12 to the pulled asphalt mixture test piece can be detected.
As shown in fig. 3 to 4, the linkage member includes a first rack 11, the first rack 11 is engaged with the first gear 8, a side end of the first gear 8 is engaged with the second gear 7, a lower end of the second gear 7 is engaged with the third gear 6, and a lower end of the third gear 6 is engaged with the second rack 15. The upper end of the first rack 11 is arranged at two sides of the lower end of the upper cover plate 10; the second gear 7, the third gear 6 and the first gear 8 are respectively arranged on the bottom plate 1 through a first vertical rod 16, a second vertical rod 18 and a connecting shaft; the second rack 15 is arranged in a recess of the pull rod 4. Both ends of the upper cover plate 10 are provided with cutouts 1001 that prevent interference with the first gear 8.
As shown in fig. 1-2, the linkage is provided as a connecting rod 17 that is hingedly connected to the upper cover plate 10 and the pull rod 4, respectively.
The following table 1 shows the ratio of the compressive stress to the tensile stress received at the center of the circle of the asphalt mixture test piece under different combinations of the vertical pressure and the transverse tension (for convenience of description, the absolute value of the ratio is referred to hereinafter):
TABLE 1
| Pressure: tension force | 1:1 | 1:0.75 | 1:0.5 | 1:0.25 | 1：0.125 |
| Compressive to tensile stress ratio at center of circle | 1:1 | 1.2：1 | 1.52:1 | 2.33:1 | 2.73：1 |
When the asphalt mixture test piece (diameter 100mm, thickness 35 mm) of the aforementioned shape is only vertically (Y direction) compressed (size is F), the compressive stress generated at the center of the test piece is obtained through finite element calculation: tensile stress =4.7; assuming that its transverse (X-direction) tensile stress is σ, its Y-direction compressive stress is-4.7 σ.
When the test piece is subjected to tensile force (with the magnitude of F) only in the X direction, according to simple elastomechanics analysis, the tensile stress in the transverse direction (in the X direction) is 4.7 sigma, and the compressive stress in the Y direction is-sigma.
When the test piece receives vertical pressure and horizontal pulling force simultaneously, if the bidirectional load size equals, according to elastomechanics's stack principle, can obtain the compressive stress that test piece centre of a circle department produced: tensile stress =5.7 σ:5.7 σ =1
In the same way, when the vertical pressure of the test piece: when the ratio of the transverse received tensile force is k, the compressive stress generated at the center of the test piece can be obtained according to the superposition principle of elastic mechanics: tensile stress = (4.7 + k) σ: (1 + 4.7k) σ = (4.7 + k)/(1 + 4.7k)
The invention achieves different k values by means of a linkage, when using a gear as linkage, for example, the radius of the first gear 8: radius of second gear 7: the radius of the third gear 6 is 1:1: at 1, the value of k is 1; when a link is used as the link, for example, the angle of the connecting rod 17 is 30 °, the value of k is 0.5.
As shown in fig. 1 and 3, one end of the pull rod 4 is connected with the asphalt mixture test piece 12 through a connecting block 13, and the other end of the pull rod 4 is provided with a limiting block 3. The asphalt mixture test piece 12 is connected with the connecting block 13 in a sticking way.
As shown in fig. 5, the tie rod 4 is composed of a first tie rod main body 401 and a second tie rod main body 402, and one ends of the first tie rod main body 401 and the second tie rod main body 402 are respectively disposed in the screw bosses 14. When the device is used specifically, the two side pull rods 4 and the asphalt mixture test piece 12 are fixed outside and then are installed on the experimental device, so that a threaded sleeve 14 is designed for connecting the two side pull rods.
As shown in fig. 1 and 3, the lower end of the slide rail 5 is provided with a first support rod 2, and the lower end of the first support rod 2 is arranged on the bottom plate 1.
Wherein the lower extreme of recess 101 is provided with elevating gear, and such structural design is because the sample preparation can't guarantee to accurate 1mm, so set up elevating gear in the bottom and finely tune to guarantee that the test piece is in whole device center, guarantee that both sides pulling force is in test piece center department.
The asphalt mixture test piece 12 is not cylindrical, specifically, as shown in fig. 7, the included angle α is 60 degrees when cutting, and the asphalt mixture test piece is a cylinder with four edges cut once, and the thickness is 35mm.
Example 1:
(1) Test subjects: a modified asphalt AC-13 mix having a diameter of 100mm and a thickness of 35mm, which was cut into a shape as shown in FIG. 7.
(2) Loading equipment: hydraulic servo material test system MTS
(3) The test conditions are as follows: the temperature is 15 ℃, the vertical loading rate is 4kN/s, a transmission mode of a connecting rod linkage piece is adopted, and the included angle between a connecting rod and the horizontal plane is 30 ℃.
(4) The test phenomenon is as follows: the strain gauge adhered to the center of the circle of the end face of the test piece is invalid firstly, and the edge of the loading clamp is not damaged by stress concentration at the moment.
(5) Breaking load: 13.47kN.
Example 2:
(1) Test subjects: a modified asphalt AC-13 mix having a diameter of 100mm and a thickness of 35mm, which was cut into a shape as shown in FIG. 7.
(2) Loading equipment: hydraulic servo material test system MTS
(3) The test conditions are as follows: the temperature is 15 ℃, the vertical loading rate is 2kN/s, a transmission mode of a connecting rod linkage piece is adopted, and the included angle between a connecting rod and the horizontal plane is 30 ℃.
(4) The test phenomenon is as follows: the strain gauge adhered to the center of the circle of the end face of the test piece is invalid firstly, and the edge of the loading clamp is not damaged by stress concentration at the moment.
(5) Breaking load: 12.65kN.
Example 3:
(1) Test subjects: a modified asphalt AC-13 mix having a diameter of 100mm and a thickness of 35mm, which was cut into a shape as shown in FIG. 7.
(2) Loading equipment: hydraulic servo material test system MTS
(3) The test conditions are as follows: the temperature is 15 ℃, the vertical loading rate is 1kN/s, a transmission mode of a connecting rod linkage piece is adopted, and the included angle between a connecting rod and the horizontal plane is 45 ℃.
(4) The test phenomenon is as follows: the strain gauge adhered to the center of the end face of the test piece is invalid firstly, and the edge of the loading clamp is not damaged by stress concentration at the moment.
(5) Breaking load: 9.83kN.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (9)
1. The experimental device for the bidirectional tension-compression equal-proportion loading strength of the asphalt mixture is characterized by comprising a bottom plate (1), wherein a groove (101) is formed in the bottom plate (1), an asphalt mixture test piece (12) is arranged in the groove (101), and a lifting device is arranged at the lower end of the groove (101); an upper cover plate (10) is arranged above the asphalt mixture test piece (12), and when the upper cover plate (10) vertically applies pressure to the asphalt mixture test piece (12), the upper cover plate (10) moves downwards to be arranged on the pull rod (4) under the action of the linkage piece so as to generate a transverse tension for realizing bidirectional load equal proportion loading on the asphalt mixture test piece (12); the pull rod (4) is arranged on the slide rail (5), the second support rod (9) is inserted on the upper cover plate (10), and the middle part of the upper end of the upper cover plate (10) is provided with a downward pressing force application part.
2. The experimental device for the equal proportional loading strength of the asphalt mixture in the bidirectional tension and compression direction according to claim 1, wherein the linkage piece is a connecting rod (17) which is respectively hinged with the upper cover plate (10) and the pull rod (4).
3. The device for testing the bidirectional tension-compression equal proportional loading strength of the asphalt mixture according to claim 1, wherein the linkage comprises a first rack (11), the first rack (11) is meshed with a first gear (8), the side end of the first gear (8) is meshed with a second gear (7), the lower end of the second gear (7) is meshed with a third gear (6), and the lower end of the third gear (6) is meshed with a second rack (15).
4. The experimental device for the bidirectional tension-compression equal proportional loading strength of the asphalt mixture as claimed in claim 3, wherein the upper end of the first rack (11) is arranged on two sides of the lower end of the upper cover plate (10); the second gear (7), the third gear (6) and the first gear (8) are arranged on the bottom plate (1) through a first vertical rod (16), a second vertical rod (18) and a connecting shaft respectively; the second rack (15) is arranged in the groove of the pull rod (4).
5. The experimental device for testing the bidirectional tension-compression equal proportional loading strength of the asphalt mixture as claimed in claim 4, wherein the two ends of the upper cover plate (10) are provided with notches (1001) for preventing interference with the first gear (8).
6. The experimental device for the bidirectional tension and compression equal proportional loading strength of the asphalt mixture as claimed in claim 1, wherein one end of the pull rod (4) is connected with the asphalt mixture test piece (12) through a connecting block (13), and the other end of the pull rod (4) is provided with a limiting block (3).
7. The device for testing the bidirectional tension and compression equal proportional loading strength of the asphalt mixture as claimed in claim 6, wherein the asphalt mixture test piece (12) is a cylinder, four sides of the asphalt mixture test piece are cut with a knife, and two sides of the asphalt mixture test piece (12) are connected with the connecting block (13) in a sticking manner.
8. The experimental device for the bidirectional tension-compression equal proportional loading strength of the asphalt mixture as claimed in claim 1, wherein the pull rod (4) is composed of a first pull rod main body (401) and a second pull rod main body (402), and one end of the first pull rod main body (401) and one end of the second pull rod main body (402) are respectively arranged in the threaded sleeves (14).
9. The experimental device for the bidirectional tension and compression equal proportional loading strength of the asphalt mixture as claimed in claim 1, wherein the lower end of the slide rail (5) is provided with a first support rod (2), and the lower end of the first support rod (2) is arranged on the bottom plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786450.2A CN115200973A (en) | 2022-07-04 | 2022-07-04 | Bituminous mixture two-way tension-compression equal proportion loading intensity experimental apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210786450.2A CN115200973A (en) | 2022-07-04 | 2022-07-04 | Bituminous mixture two-way tension-compression equal proportion loading intensity experimental apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN115200973A true CN115200973A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210786450.2A Withdrawn CN115200973A (en) | 2022-07-04 | 2022-07-04 | Bituminous mixture two-way tension-compression equal proportion loading intensity experimental apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577221A (en) * | 2023-04-10 | 2023-08-11 | 湖南建工交通建设有限公司 | Asphalt mixture splitting fatigue test method for ensuring first splitting at circle center |
-
2022
- 2022-07-04 CN CN202210786450.2A patent/CN115200973A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577221A (en) * | 2023-04-10 | 2023-08-11 | 湖南建工交通建设有限公司 | Asphalt mixture splitting fatigue test method for ensuring first splitting at circle center |
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