CN205049418U - Portable test device of research bituminous mixture fatigue characteristic - Google Patents
Portable test device of research bituminous mixture fatigue characteristic Download PDFInfo
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- CN205049418U CN205049418U CN201520832110.4U CN201520832110U CN205049418U CN 205049418 U CN205049418 U CN 205049418U CN 201520832110 U CN201520832110 U CN 201520832110U CN 205049418 U CN205049418 U CN 205049418U
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- eccentric block
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- rotating shaft
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Abstract
The utility model discloses a portable test device of research bituminous mixture fatigue characteristic, including the environment case, stress loading system and power unit, stress loading system sets up at the environment incasement, stress loading system includes first support, second support and loading box, first support and second support are located the below both sides of loading box respectively, the loading bottom half is equipped with the loading piece, the bottom of first support and second support all is equipped with pressure sensor, install first pivot and second pivot in the loading box, install first gear in the first pivot, first eccentric block and second eccentric block, install the second gear in the second pivot, third eccentric block and fourth eccentric block, the first gear engages with the second gear, first eccentric block and third eccentric block symmetry set up, second eccentric block and fourth eccentric block symmetry set up. The utility model discloses convenient to use need not rely on multiple high precision measurement component, low in manufacturing cost, and the maintenance is simple, and is small, is convenient for remove.
Description
Technical field
The utility model relates to a kind of test unit, especially relates to a kind of portable test unit of Research on Asphalt Mixture fatigue properties.
Background technology
The fatigue properties of asphalt have important directive significance to bituminous pavement design, construction and maintenance.At present, both at home and abroad when carrying out asphalt mixture fatigue testing, main use adopts the fatigue tester of Pneumatic servo loading system or Based on Electro-hydraulic Loading Servo System to carry out four-point bending fatigue loading to asphalt girder test specimen.Use the fatigue tester of servo-drive system bulky, mobile difficulty, and the development need of servo-drive system makes full use of multiple high-precision measuring sensor and electronic technology and computer technology, in actual use, also need to be equipped with the Testing Software based on computer, therefore adopt the fatigue tester of servo-drive system expensive; Further, due to the complicacy of servo-drive system circuit, so its maintenance is cumbersome.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of portable test unit of Research on Asphalt Mixture fatigue properties is provided, its structure is simple, reasonable in design and easy and simple to handle, do not need to rely on multiple high-acruracy survey element, efficiently solving existing asphalt mixture fatigue testing machine adopts servo-drive system to load problem that is expensive, maintenance difficult, volume is little simultaneously, is convenient to mobile.
For achieving the above object, the technical solution adopted in the utility model is: a kind of portable test unit of Research on Asphalt Mixture fatigue properties, it is characterized in that: comprise environmental cabinet, stress loading system and for driving stress loading system to the actuating unit of girder test specimen loading stress to be measured, described stress loading Operation system setting is in described environmental cabinet, described stress loading system comprises the first bearing, second bearing and loading casing, described first bearing and the second bearing lay respectively at the both sides, below loading casing, described first bearing has the 3rd mounting hole, described second bearing has the first mounting hole, the bottom of described loading casing is provided with loading blocks, described loading blocks has the second mounting hole, described 3rd mounting hole, first mounting hole and the second mounting hole all coordinate with girder test specimen to be measured, the bottom of described first bearing and the second bearing is provided with executes stressed pressure transducer for detecting described stress loading system to described environmental cabinet, described pressure transducer is arranged on described environmental cabinet inner bottom part, the first rotating shaft and the second rotating shaft is rotatablely equipped with in described loading casing, described first rotating shaft is provided with the first gear, first eccentric block and the second eccentric block, described second rotating shaft is provided with the second gear, three eccentricity block and the 4th eccentric block, described first gear and the second gears meshing, described first eccentric block and three eccentricity block are symmetrical arranged, described second eccentric block and the 4th eccentric block are symmetrical arranged.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, it is characterized in that: described environmental cabinet comprises casing, described casing inner top is provided with cooling-water machine, described casing inner bottom part is provided with heating wire and the temperature sensor for measuring temperature in casing, and described pressure transducer is fixed on casing inner bottom part.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, it is characterized in that: the middle part of described casing is provided with water inlet, the bottom of described casing is provided with water delivering orifice.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, is characterized in that: be connected with to protect between described casing inner top and the outer top of loading casing and restrict.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, it is characterized in that: described actuating unit comprises variable-speed motor and flexible axle, the output shaft of described variable-speed motor is connected with one end of the inner core of flexible axle, and the other end of the inner core of described flexible axle is connected with the first rotating shaft.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, it is characterized in that: the top of described first bearing and the second bearing is provided with the first bolt for fixing girder test specimen to be measured, the bottom of described loading blocks is provided with the second bolt for fixing girder test specimen to be measured.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, it is characterized in that: described first rotating shaft and the second rotating shaft are all parallel with girder test specimen to be measured, described first gear and the first eccentric block all with the first rotating shaft interference fit, described second eccentric block and the first rotating shaft transition fit and the angle that can adjust between the second eccentric block and the first eccentric block; Described second gear and three eccentricity block all with the second rotating shaft interference fit, described 4th eccentric block and the second rotating shaft transition fit and the 4th angle between eccentric block and three eccentricity block can be adjusted; Angle between second eccentric block and the first eccentric block is equal with the 4th angle between eccentric block and three eccentricity block.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, is characterized in that: described first eccentric block and three eccentricity block be equal in weight and size is identical, described second eccentric block and the 4th eccentric block be equal in weight and size is identical.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, it is characterized in that: the quantity of described loading blocks is two, two described loading blocks are symmetricly set on the two ends, bottom loading casing, and girder test specimen to be measured is divided uniformly three sections by described first bearing, the second bearing and two loading blocks.
The portable test unit of above-mentioned a kind of Research on Asphalt Mixture fatigue properties, is characterized in that: the shape of described 3rd mounting hole is U-shaped, and the shape of described first mounting hole and the second mounting hole is square.
The utility model compared with prior art has the following advantages:
1, the utility model structure simple, reasonable in design and use easy and simple to handle, portability is strong.
2, the utility model uses four eccentric blocks to girder test specimen loading stress, wherein be arranged between the first eccentric block in the first rotating shaft and the second eccentric block and there is certain angle, be arranged between the three eccentricity block of the second rotating shaft and the 4th eccentric block and there is certain angle, both angles are equal, and the first eccentric block and three eccentricity block are symmetrical arranged, second eccentric block and the 4th eccentric block are symmetrical arranged, the angle changed between eccentric block can regulate the stress applied girder test specimen, by the pressure that pressure transducer records, the stress that stress loading system loads girder test specimen can be drawn as calculated, with the change of monitor stress level, thus realize varying stress loading, after several loaded cycle, girder test specimen ruptures, easy and simple to handle, loads effective, and test accurately.
3, the utility model applied stress loading system is to girder test specimen loading stress to be measured, when dynamic input, first rotating shaft and the second rotating shaft are with identical rotating speed and contrary turn to rotation, due to the first eccentric block and three eccentricity block be equal in weight and size is identical, second eccentric block and the 4th eccentric block be equal in weight and size is identical, therefore, the component of the horizontal direction of the first eccentric block and three eccentricity block is cancelled out each other, the component of the horizontal direction of the second eccentric block and the 4th eccentric block is cancelled out each other, and only deposits the component of in the vertical direction; Again because girder test specimen to be measured is divided uniformly three sections by the first bearing, the second bearing and two loading blocks, thus can realize loading girder test specimen to be measured 4 torture tests.
4, due to the simulation of girder test specimen is road surface, and road surface also may be in moist or water-immerged state, the utility model by arranging water inlet and water delivering orifice on casing, the antifatigue situation of test girder test specimen when needing at moist or water-immerged, only need in environmental cabinet, add a certain amount of adding water, the temperature in casing is measured in real time by temperature sensor, if measured temperature and probe temperature are not inconsistent, then cooling-water machine or heating wire are started working, until the temperature in casing reaches probe temperature, achieve the requirement that girder test specimen carries out torture test in water.
5, the utility model applied stress loading system carries out torture test loading to girder test specimen to be measured, can the impact of the vehicle road pavement of simulated driving on road surface well, and avoid the servo-drive system needing to use multiple high-precision measuring sensor, avoid and use expensive servo-drive system, do not need to use complicated computer technology, this installation cost is cheap simultaneously, small volume, keep in repair very convenient, with low cost.
Below by drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation after the utility model removes environmental cabinet and actuating unit.
Fig. 3 is the structural representation of the utility model first bearing.
Fig. 4 is the structural representation of the utility model second bearing.
Fig. 5 is the position relationship schematic diagram of the utility model loading blocks and the second bolt.
Description of reference numerals:
1-variable-speed motor; 2-the three mounting hole; 3-flexible axle;
4-casing; 4-1-water inlet; 4-2-water delivering orifice;
5-cooling-water machine; 6-temperature sensor; 7-heating wire;
8-1-the first bolt; 8-2-the second bolt; 9-the second bearing;
9-1-the first mounting hole; 10-the second rotating shaft; 11-load casing;
12-1-the first eccentric block; 12-2-the second eccentric block; 12-3-the three eccentricity block;
12-4-the 4th eccentric block; 13-1-the first gear; 13-2-the second gear;
14-loading blocks; 15-the first rotating shaft; 16-girder test specimen to be measured;
17-the second mounting hole; 18-the first bearing; 19-pressure transducer;
20-protection rope.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises environmental cabinet, stress loading system and for driving stress loading system to the actuating unit of girder test specimen 16 loading stress to be measured, described stress loading Operation system setting is in described environmental cabinet, described stress loading system comprises the first bearing 18, second bearing 9 and loading casing 11, described first bearing 18 and the second bearing 9 lay respectively at the both sides, below loading casing 11, described first bearing 18 has the 3rd mounting hole 2, described second bearing 9 has the first mounting hole 9-1, the bottom of described loading casing 11 is provided with loading blocks 14, described loading blocks 14 has the second mounting hole 17, described 3rd mounting hole 2, first mounting hole 9-1 and the second mounting hole 17 all coordinate with girder test specimen 16 to be measured, the bottom of described first bearing 18 and the second bearing 9 is provided with executes stressed pressure transducer 19 for detecting described stress loading system to described environmental cabinet, described pressure transducer 19 is arranged on described environmental cabinet inner bottom part, the first rotating shaft 15 and the second rotating shaft 10 is rotatablely equipped with in described loading casing 11, described first rotating shaft 15 is provided with the first gear 13-1, first eccentric block 12-1 and the second eccentric block 12-2, described second rotating shaft 10 is provided with the second gear 13-2, three eccentricity block 12-3 and the 4th eccentric block 12-4, described first gear 13-1 engages with the second gear 13-2, described first eccentric block 12-1 and three eccentricity block 12-3 is symmetrical arranged, described second eccentric block 12-2 and the 4th eccentric block 12-4 is symmetrical arranged.
As shown in Figure 1, described environmental cabinet comprises casing 4, and described casing 4 inner top is provided with cooling-water machine 5, and described casing 4 inner bottom part is provided with heating wire 7 and the temperature sensor 6 for measuring temperature in casing 4, and described pressure transducer 19 is fixed on casing 4 inner bottom part.During use, measured the temperature in casing 4 in real time by temperature sensor 6, if measured temperature and probe temperature are not inconsistent, then cooling-water machine 5 or heating wire 7 are started working, until the temperature in casing 4 reaches probe temperature.
As shown in Figure 1, the middle part of described casing 4 is provided with water inlet 4-1, and the bottom of described casing 4 is provided with water delivering orifice 4-2.Due to the simulation of girder test specimen is road surface, road surface also may be in moist or water-immerged state, when testing girder test specimen torture test when needs carry out moist or water-immerged, only need in environmental cabinet, add a certain amount of adding water, the control mode of water temperature is identical with above-mentioned water temperature control mode.
As shown in Figure 1, be connected with between described casing 4 inner top and the loading outer top of casing 11 and protect rope 20, when off-test, girder test specimen ruptures, and protection rope 20 can be held loading casing 11 and limit its motion, avoids damaging.
As shown in Figure 1, described actuating unit comprises variable-speed motor 1 and flexible axle 3, and the output shaft of described variable-speed motor 1 is connected with one end of the inner core of flexible axle 3, and the other end of the inner core of described flexible axle 3 is connected with the first rotating shaft 15.During use, variable-speed motor 1 rotates, and drives the inner core of flexible axle 3 to rotate, and the inner core of flexible axle 3 rotates drive first rotating shaft 15 and rotates.
As depicted in figs. 1 and 2, the top of described first bearing 18 and the second bearing 9 is provided with the first bolt 8-1 for fixing girder test specimen 16 to be measured, the bottom of described loading blocks 14 is provided with the second bolt 8-2 for fixing girder test specimen 16 to be measured, and adopt bolt to fix, convenient fixing is reliable.
As shown in Figure 2, described first rotating shaft 15 and the second rotating shaft 10 are all parallel with girder test specimen 16 to be measured, described first gear 13-1 and the first eccentric block 12-1 all with the first rotating shaft 15 interference fit, described second eccentric block 12-2 and the first rotating shaft 15 transition fit and the angle that can adjust between the second eccentric block 12-2 and the first eccentric block 12-1; Described second gear 13-2 and three eccentricity block 12-3 all with the second rotating shaft 10 interference fit, described 4th eccentric block 12-4 and the second rotating shaft 10 transition fit and the angle that can adjust between the 4th eccentric block 12-4 and three eccentricity block 12-3; Angle between second eccentric block 12-2 and the first eccentric block 12-1 is equal with the angle between the 4th eccentric block 12-4 and three eccentricity block 12-3.
In the present embodiment, described first eccentric block 12-1 and three eccentricity block 12-3 be equal in weight and size is identical, described second eccentric block 12-2 and the 4th eccentric block 12-4 be equal in weight and size is identical, the component of the horizontal direction of such first eccentric block 12-1 and three eccentricity block 12-3 is cancelled out each other, the component of the horizontal direction of the second eccentric block 12-2 and the 4th eccentric block 12-4 is cancelled out each other, only deposit the component of in the vertical direction, load effective.
As depicted in figs. 1 and 2, the quantity of described loading blocks 14 is two, two described loading blocks 14 are symmetricly set on the two ends, bottom loading casing 11, described first bearing 18, second bearing 9 and two loading blocks 14, by girder test specimen to be measured 16 points uniformly three sections, can realize loading girder test specimen to be measured 4 torture tests like this; Certainly, loading blocks 14 also can be one, realizes loading girder test specimen to be measured 3 torture tests.
As shown in Figures 3 to 5, the shape of described 3rd mounting hole 2 is U-shaped, and the shape of described first mounting hole 9-1 and the second mounting hole 17 is square.
In the present embodiment, described first gear 13-1 and the second gear 13-2 is straight spur gear.
Principle of work of the present utility model is: during use, opens environmental cabinet, by girder test specimen 16 to be measured successively through after the 3rd mounting hole 2, first mounting hole 9-1 and the second mounting hole 17, adopts the first bolt 8-1 and the second bolt 8-2 to be fixed by girder test specimen 16 to be measured.If the temperature in the casing 4 that temperature sensor 6 is surveyed and probe temperature are not inconsistent, then cooling-water machine 5 or heating wire 7 are started working, until the temperature in casing 4 reaches required probe temperature.Then, open variable-speed motor 1, variable-speed motor 1 drives the inner core of flexible axle 3 to rotate, and the inner core of flexible axle 3 drives the first rotating shaft 15 to rotate, and the first rotating shaft 15 drives the first gear 13-1 to rotate, because the second gear 13-2 engages with the first gear 13-1, so the second gear 13-2 rotates, the second gear 13-2 drives the second rotating shaft 10 to rotate, and namely the first rotating shaft 15 and the second rotating shaft 10 are rotated simultaneously, and rotation direction is contrary, rotating speed is identical.Now, be arranged on the first eccentric block 12-1 in the first rotating shaft 15 and the second eccentric block 12-2, rotate backward with same rotating speed with the three eccentricity block 12-3 be arranged in the second rotating shaft 10 and the 4th eccentric block 12-4, under loading the effect of the vertical force component of the eccentric force that casing 11 produces at the first eccentric block 12-1, the second eccentric block 12-2, three eccentricity block 12-3 and the 4th eccentric block 12-4, vertical acting force is applied to girder test specimen 16 to be measured, realizes loading girder test specimen 16 torture test to be measured.In loading procedure, by the pressure that pressure transducer 19 records, calculate further and can draw the stress that stress loading system loads girder test specimen, after several loaded cycle, girder test specimen ruptures, thus can under this stress level fatigue lifetime of girder test specimen.The size adjustment of loading force, by adjusting the angle between the second eccentric block 12-2 and the first eccentric block 12-1, and the 4th angle between eccentric block 12-4 and three eccentricity block 12-3 realize, during each adjustment, should ensure that the first eccentric block 12-1 and three eccentricity block 12-3 is symmetrical, and the second eccentric block 12-2 and the 4th eccentric block 12-4 is symmetrical.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. the portable test unit of Research on Asphalt Mixture fatigue properties, it is characterized in that: comprise environmental cabinet, stress loading system and for driving stress loading system to the actuating unit of girder test specimen (16) loading stress to be measured, described stress loading Operation system setting is in described environmental cabinet, described stress loading system comprises the first bearing (18), second bearing (9) and loading casing (11), described first bearing (18) and the second bearing (9) lay respectively at the both sides, below loading casing (11), described first bearing (18) has the 3rd mounting hole (2), described second bearing (9) has the first mounting hole (9-1), the bottom of described loading casing (11) is provided with loading blocks (14), described loading blocks (14) has the second mounting hole (17), described 3rd mounting hole (2), first mounting hole (9-1) and the second mounting hole (17) all coordinate with girder test specimen (16) to be measured, the bottom of described first bearing (18) and the second bearing (9) is provided with executes stressed pressure transducer (19) for detecting described stress loading system to described environmental cabinet, described pressure transducer (19) is arranged on described environmental cabinet inner bottom part, the first rotating shaft (15) and the second rotating shaft (10) is rotatablely equipped with in described loading casing (11), described first rotating shaft (15) is provided with the first gear (13-1), first eccentric block (12-1) and the second eccentric block (12-2), described second rotating shaft (10) is provided with the second gear (13-2), three eccentricity block (12-3) and the 4th eccentric block (12-4), described first gear (13-1) is engaged with the second gear (13-2), described first eccentric block (12-1) and three eccentricity block (12-3) are symmetrical arranged, described second eccentric block (12-2) and the 4th eccentric block (12-4) are symmetrical arranged.
2. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: described environmental cabinet comprises casing (4), described casing (4) inner top is provided with cooling-water machine (5), described casing (4) inner bottom part is provided with heating wire (7) and the temperature sensor (6) for measuring casing (4) interior temperature, and described pressure transducer (19) is fixed on casing (4) inner bottom part.
3. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 2, it is characterized in that: the middle part of described casing (4) is provided with water inlet (4-1), the bottom of described casing (4) is provided with water delivering orifice (4-2).
4. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 2, it is characterized in that: be connected with between described casing (4) inner top and loading casing (11) outer top and protect restrict (20).
5. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: described actuating unit comprises variable-speed motor (1) and flexible axle (3), the output shaft of described variable-speed motor (1) is connected with one end of the inner core of flexible axle (3), and the other end of the inner core of described flexible axle (3) is connected with the first rotating shaft (15).
6. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: the top of described first bearing (18) and the second bearing (9) is provided with the first bolt (8-1) for fixing girder test specimen (16) to be measured, the bottom of described loading blocks (14) is provided with the second bolt (8-2) for fixing girder test specimen (16) to be measured.
7. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: described first rotating shaft (15) and the second rotating shaft (10) are all parallel with girder test specimen (16) to be measured, described first gear (13-1) and the first eccentric block (12-1) all with the first rotating shaft (15) interference fit, described second eccentric block (12-2) and the first rotating shaft (15) transition fit and the angle that can adjust between the second eccentric block (12-2) and the first eccentric block (12-1); Described second gear (13-2) and three eccentricity block (12-3) all with the second rotating shaft (10) interference fit, described 4th eccentric block (12-4) and the second rotating shaft (10) transition fit and the angle that can adjust between the 4th eccentric block (12-4) and three eccentricity block (12-3); Angle between second eccentric block (12-2) and the first eccentric block (12-1) is equal with the angle between the 4th eccentric block (12-4) and three eccentricity block (12-3).
8. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: described first eccentric block (12-1) and three eccentricity block (12-3) be equal in weight and size is identical, described second eccentric block (12-2) and the 4th eccentric block (12-4) be equal in weight and size is identical.
9. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: the quantity of described loading blocks (14) is two, two described loading blocks (14) are symmetricly set on the two ends, bottom loading casing (11), and girder test specimen (16) to be measured is divided uniformly three sections by described first bearing (18), the second bearing (9) and two loading blocks (14).
10. according to the portable test unit of a kind of Research on Asphalt Mixture fatigue properties according to claim 1, it is characterized in that: the shape of described 3rd mounting hole (2) is U-shaped, and the shape of described first mounting hole (9-1) and the second mounting hole (17) is square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520832110.4U CN205049418U (en) | 2015-10-26 | 2015-10-26 | Portable test device of research bituminous mixture fatigue characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520832110.4U CN205049418U (en) | 2015-10-26 | 2015-10-26 | Portable test device of research bituminous mixture fatigue characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205049418U true CN205049418U (en) | 2016-02-24 |
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ID=55342988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520832110.4U Expired - Fee Related CN205049418U (en) | 2015-10-26 | 2015-10-26 | Portable test device of research bituminous mixture fatigue characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205049418U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259057A (en) * | 2015-10-26 | 2016-01-20 | 长安大学 | Small beam test piece fatigue test device |
| CN105738231A (en) * | 2016-05-11 | 2016-07-06 | 哈尔滨工业大学 | MTS-loading based bituminous mixture fatigue test unit |
| CN107884294A (en) * | 2017-11-10 | 2018-04-06 | 江苏中路工程技术研究院有限公司 | A kind of ground surface material testing method of endurance performance |
-
2015
- 2015-10-26 CN CN201520832110.4U patent/CN205049418U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259057A (en) * | 2015-10-26 | 2016-01-20 | 长安大学 | Small beam test piece fatigue test device |
| CN105259057B (en) * | 2015-10-26 | 2018-02-13 | 长安大学 | Girder test specimen fatigue experimental device |
| CN105738231A (en) * | 2016-05-11 | 2016-07-06 | 哈尔滨工业大学 | MTS-loading based bituminous mixture fatigue test unit |
| CN107884294A (en) * | 2017-11-10 | 2018-04-06 | 江苏中路工程技术研究院有限公司 | A kind of ground surface material testing method of endurance performance |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20161026 |