CN204359636U - A kind of stability of asphalt mixture evaluating apparatus - Google Patents
A kind of stability of asphalt mixture evaluating apparatus Download PDFInfo
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- CN204359636U CN204359636U CN201520065500.3U CN201520065500U CN204359636U CN 204359636 U CN204359636 U CN 204359636U CN 201520065500 U CN201520065500 U CN 201520065500U CN 204359636 U CN204359636 U CN 204359636U
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- stability
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- asphalt mixture
- evaluating apparatus
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Abstract
The utility model discloses a kind of stability of asphalt mixture evaluating apparatus, comprise base, lifting device is provided with in base, lifting device controls the lifting of the crane be arranged on above base, in crane, be provided with motor, motor by kinematic train with one vertically arrange and bottom be provided with and grind the load bar hammered into shape and be connected.The utility model evaluates the new test unit of the water stability of asphalt based on the test of immersion grinding marshal piece, test considers high temperature, immersion, the worst condition of load, transmission and load system is provided with in the utility model, can on the basis of existing immersion Marshall test, grinding under load is carried out to test specimen, the load that imitation specimen is subject in practical situations both, friction and moisture are on the impact of test specimen, therefore test findings is closer to truth, has more reference value.
Description
Technical field
The utility model belongs to performance of asphalt mixture assessment technique field, is specifically related to a kind of stability of asphalt mixture evaluating apparatus.
Background technology
Moisture Damage is bituminous pavement under the effect of water or Frozen-thawed cycled, due to the effect of automotive wheel dynamic loads, the water entered in space, road surface constantly produces the iterative cycles effect of flowing pressure or negative pressure of vacuum suction, moisture immerses pitch gradually with on the interface gathered materials, asphalt adhesion is made to reduce and lose cohesive force gradually, asphalt membrane departs from (stripping) from stone surface, and asphalt falls grain, loose, then forms the hole groove of bituminous pavement, pushes the damage phenomenon of distortion etc.
Asphalt is under immersion condition, because the adhesion of pitch and mineral aggregate reduces, cause damaging, the overall mechanical strength finally showing as compound reduces, and therefore the water stability of asphalt is finally that the degree reduced by asphalt physical and mechanical property under immersion condition characterizes.The method of current evaluation pitch water stability is immersion Marshall test and indirect tensile test on frozen-thaw, but these two tests only simulate the impact of water and Temperature on Asphalt Mixture, do not consider the effect of vehicle dynamic load, therefore the water stability index of evaluation asphalt and actual result differ greatly.
Summary of the invention
For the deficiency of existing test method, the utility model target be to provide a kind of directly simple and test result accurately device to evaluate the water stabilizing of asphalt.
In order to realize above-mentioned task, the technical solution adopted in the utility model is:
A kind of stability of asphalt mixture evaluating apparatus, comprise base, lifting device is provided with in base, lifting device controls the lifting of the crane be arranged on above base, in crane, be provided with motor, motor by kinematic train with one vertically arrange and bottom be provided with and grind the load bar hammered into shape and be connected.
Further, the below of described grinding hammer is provided with tank, is provided with the draw-in groove for fixing marshal piece, tank is provided with temperature controller in tank.
Further, described load bar is provided with can to the load controller of load bar axial force distribution, and load controller is arranged on crane.
Further, described kinematic train comprises the sprocket wheel be arranged on load bar, and sprocket wheel is connected with load bar by keyway, and load bar can along it axially relative to sprocket.
Further, described kinematic train also comprises the reductor be arranged on motor output shaft, and reductor is connected with described sprocket wheel by chain.
Further, described lifting device adopts lifting jack, and lifting jack is connected with described crane by lifting column.
Further, described grinding hammer is enclosed with rubber layer, and the bottom surface of grinding hammer is identical with the size of test specimen end face.
Further, described stability of asphalt mixture evaluating apparatus also comprises Programmable Logic Controller, and Programmable Logic Controller is connected with lifting device, motor, temperature controller and load controller respectively.
The utility model evaluates the new test unit of the water stability of asphalt based on the test of immersion grinding marshal piece, test considers high temperature, immersion, the worst condition of load, transmission and load system is provided with in the utility model, can on the basis of existing immersion Marshall test, grinding under load is carried out to test specimen, the load that imitation specimen is subject in practical situations both, friction and moisture are on the impact of test specimen, therefore test findings is closer to truth, have more reference value, the number percent of asphalt loss is ground under drawing immersion condition.The number percent of loss is less, illustrates that the water stability of asphalt is better, otherwise when the number percent of loss is larger, asphalt water is stable poorer.Effectively can evaluate the water stabilizing of dissimilar asphalt, to stability of asphalt mixture evaluation, there is positive promotion meaning.The utility model definite principle, simple to operate, can be by force handling, experimental result is accurate, for stability of asphalt mixture provides a kind of effectively evaluating device in Asphalt Mixture Design, construction and maintenance processes.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Wherein: 1-base, 2-lifting device, 3-lifting column, 4-motor, 5-reductor, 6-chain, 7-crane, 8-load controller, 9-grinding hammer, 10-tank, 11-marshal piece, 12-draw-in groove, 13-temperature controller, 14-load bar, 15-sprocket wheel.
Embodiment
Defer to technique scheme, as shown in Figure 1, the utility model cannot rub under load-up condition to test specimen under simulating nature situation to solve in current water stability evaluation test, the situation of water erosion, devises loading system, existing test can be coordinated to complete the evaluation of test specimen performance.
A kind of stability of asphalt mixture evaluating apparatus, comprise base 1, lifting device 2 is provided with in base 1, lifting device 2 controls the lifting of the crane 7 be arranged on above base 1, in crane 7, be provided with motor 4, motor 4 by kinematic train with one vertically arrange and bottom is provided with the load bar 14 grinding hammer 9 is connected.
Base 1 is airtight, and lifting device 2 is arranged in base 1, only its output shaft protuberate basic unit 1 end face, the impact that the water in the tank 10 that airtight base 1 can prevent its side from arranging produces lifting device 2.The position that lifting device 2 controls crane 7 changes, and the motion of crane 7 then drives load bar 14 to move, make load bar 14 near or away from test specimen.The mode of grinding can be adopted simulate to the friction of test specimen, specifically be provided with motor 4 and moment of torsion can be passed to load bar 14, open motor 4 after load bar 14 contacts with surface of test piece, grind; Can adopt in addition and apply pressure at crane 7 top and simulate load effect to test specimen.
In order to give test specimen imposed load better, can arrange a load controller 8 again, the effect of load controller 8 applies axial dynamics to load bar 14, can adopt hydraulic means to realize.The adjustment of load is preferably directly perceived, controlled.Load device is arranged on the upper end of load bar 14, is connected with load bar 14 by bearing, and when applying axial force to load bar 14, load bar 14 still can rotation.
Concrete kinematic train can adopt sprocket wheel 15 chain 6 to coordinate.Owing to being provided with loading system, keeping load bar 14 rotation that grinding is hammered into shape and 9 can grind event, can adopt and key is set in the mounting hole of sprocket wheel 15 and in the mode axially arranging one section of groove of load bar 14, sprocket wheel 15 is installed.The displacement slightly of load bar 14 axis so driven due to load controller 8 pairs of load bar 14 axial application of force just can carry out transition by the cooperation of keyway, and namely load bar 14 can move within the specific limits relative to sprocket wheel 15 direction of axis line.And due to the fit system of keyway, load bar 14 when sprocket wheel 15 is rotated, still can be driven to rotate.Kinematic train is provided with reductor 5 in motor 4 one end, the rotating speed of adjustable load bar 14, and reductor 5 is connected with sprocket wheel 15 by chain 6.
Lifting device 2 can adopt lifting jack, is connected with crane 7 by a pair lifting column 3, control crane 7 drive load bar 14 near or away from test specimen.
When concrete test, tank 10 is set below grinding hammer 9, draw-in groove 12 is set in tank 10, marshal piece 11 is installed in draw-in groove 12.Draw-in groove 12 needs to be fixed on tank 10, and the position of tank 10 also needs to fix, and test specimen position when being subject to grinding can not be changed.Tank 10 is provided with temperature controller 13, the water temperature in adjustable tank 10, makes the water temperature of tank 10 reach testing requirements.The test test specimen adopted is the pitch marshal piece 11 of standard, selects the grating of requirement, make marshal piece 11 by code requirement and actual needs.Grinding hammer 9 is enclosed with rubber layer, the effect of the actual road pavement of simulated automotive tire, and the bottom surface of grinding hammer 9 is identical with the size of test specimen end face.
Owing to needing the condition of adjustment more, control in order to unified easily, a Programmable Logic Controller can be set, be connected with lifting group device, motor 4, temperature controller 13, load controller 8.The running of each several part so just can be controlled by a controller, as adjusted the height of crane 7 by controlling lifting device 2, rotating speed when being ground by motor 4 adjustment, water temperature in tank 10 is adjusted by temperature controller 13, load controller 8 controls the size of imposed load, and can arrange display screen real-time monitored parameters.
The utility model is utilized to carry out the step of stability of asphalt mixture evaluation as follows:
1. preliminary work
The match ratio of 1.1 asphalts used according to test, marshal piece is prepared by " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ052---2000) requirement, sample dimensions should meet diameter 101.6mm ± 0.2mm, the requirement of high 63.5mm ± 1.3mm;
1.2 measurement height of specimens and diameter are accurately to 0.1mm, and the undesirable test specimen of size cancels;
The temperature of tank is adjusted to the temperature of testing requirements by 1.3, and under immersion condition, the temperature of test is 60 DEG C ± 5 DEG C.
2. test procedure
2.1 quality taking initial test specimen, are designated as m
0;
The test specimen condition of soaking is placed down in the constant temperature refrigerator of-18 DEG C ± 2 DEG C by 2.2, health 24h ± 1h;
Test specimen takes out from refrigerator by 2.3, puts into the tank originally setting temperature and goes, and the temperature of tank is 60 DEG C ± 5 DEG C, and the water of tank wants the whole test specimen of submergence;
2.4 pairs of test specimens carry out immersion grinding, now regulate Programmable Logic Controller, make load be 0.7Mpa; The speed of grinding is 86r/min, and milling time is 24h;
Test specimen takes out by 2.5, the compound peeled off by water cleaning surface of test piece;
Test specimen to be put into and is dried to constant weight in 60 DEG C of baking ovens by 2.6, takes its quality m
1;
2.7 repeat above test procedure, and a kind of parallel experiment of compound must not be less than 3 times.
3. calculate
In formula: grind asphalt loss under Δ S-immersion condition, %; m
0-initial test specimen quality, g; m
1test specimen quality after-test, g.
Claims (8)
1. a stability of asphalt mixture evaluating apparatus, comprise base (1), it is characterized in that, lifting device (2) is provided with in described base (1), lifting device (2) controls the lifting of the crane (7) being arranged on base (1) top, in crane (7), be provided with motor (4), motor (4) by kinematic train with one vertically arrange and bottom be provided with and grind the load bar (14) hammering (9) into shape and be connected.
2. stability of asphalt mixture evaluating apparatus as claimed in claim 1, it is characterized in that, the below of described grinding hammer (9) is provided with tank (10), be provided with the draw-in groove (12) for fixing marshal piece (11) in tank (10), tank (10) be provided with temperature controller (13).
3. stability of asphalt mixture evaluating apparatus as claimed in claim 2, it is characterized in that, described load bar (14) is provided with can to the load controller (8) of load bar (14) axial force distribution, and load controller (8) is arranged on crane (7).
4. stability of asphalt mixture evaluating apparatus as claimed in claim 1, it is characterized in that, described kinematic train comprises the sprocket wheel (15) be arranged on load bar (14), sprocket wheel (15) is connected with load bar (14) by keyway, and load bar (14) axially can move relative to sprocket wheel (15) along it.
5. stability of asphalt mixture evaluating apparatus as claimed in claim 4, it is characterized in that, described kinematic train also comprises the reductor (5) be arranged on motor (4) output shaft, and reductor (5) is connected with described sprocket wheel (15) by chain (6).
6. stability of asphalt mixture evaluating apparatus as claimed in claim 1, is characterized in that, described lifting device (2) adopts lifting jack, and lifting jack is connected with described crane (7) by lifting column (3).
7. stability of asphalt mixture evaluating apparatus as claimed in claim 1, is characterized in that, described grinding hammer (9) is enclosed with rubber layer, and the bottom surface of grinding hammer (9) is identical with the size of test specimen end face.
8. stability of asphalt mixture evaluating apparatus as claimed in claim 3, it is characterized in that, described stability of asphalt mixture evaluating apparatus also comprises Programmable Logic Controller, and Programmable Logic Controller is connected with lifting device (2), motor (4), temperature controller (13) and load controller (8) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065500.3U CN204359636U (en) | 2015-01-30 | 2015-01-30 | A kind of stability of asphalt mixture evaluating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065500.3U CN204359636U (en) | 2015-01-30 | 2015-01-30 | A kind of stability of asphalt mixture evaluating apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN204359636U true CN204359636U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520065500.3U Expired - Fee Related CN204359636U (en) | 2015-01-30 | 2015-01-30 | A kind of stability of asphalt mixture evaluating apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950141A (en) * | 2017-03-06 | 2017-07-14 | 武汉工程大学 | Consider the HMA antistrip performances experimental rig and evaluation method of flowing pressure effect |
| CN115014977A (en) * | 2022-06-02 | 2022-09-06 | 无锡市城市道桥科技有限公司 | Steel slag and asphalt mixture water stability testing process |
-
2015
- 2015-01-30 CN CN201520065500.3U patent/CN204359636U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950141A (en) * | 2017-03-06 | 2017-07-14 | 武汉工程大学 | Consider the HMA antistrip performances experimental rig and evaluation method of flowing pressure effect |
| CN115014977A (en) * | 2022-06-02 | 2022-09-06 | 无锡市城市道桥科技有限公司 | Steel slag and asphalt mixture water stability testing process |
| CN115014977B (en) * | 2022-06-02 | 2023-11-28 | 无锡市城市道桥科技有限公司 | Water stability testing process for steel slag asphalt mixture |
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Legal Events
| 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 |
Granted publication date: 20150527 Termination date: 20160130 |
|
| EXPY | Termination of patent right or utility model |