CN206362651U - A kind of asphalt strain test instrument - Google Patents
A kind of asphalt strain test instrument Download PDFInfo
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- CN206362651U CN206362651U CN201720034049.8U CN201720034049U CN206362651U CN 206362651 U CN206362651 U CN 206362651U CN 201720034049 U CN201720034049 U CN 201720034049U CN 206362651 U CN206362651 U CN 206362651U
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Abstract
The utility model discloses a kind of asphalt strain test instrument, including experiment instrument body, test block fixing device is provided with experiment instrument body, the loading test wheel and experiment wheel drive unit run along test block plane, test block fixing device includes die trial, die trial is cylindrical die, some die trials closely link to form oval racetrack structure and be fixed on the die trial objective table of organism bottom, the cylindrical test block being adapted with its physical dimension is fixed with each die trial, loading test wheel rolls operation by the experiment wheel drive unit installed in body upper along test block upper surface ring.Actual road conditions can truly be reduced by this test instrument, the strain experiment of turn inside diameter, one-way traffic and rainfall road pavement can be tested, test block can proceed with Marshall stability test after strain experiment is carried out, detect the intensity index of the asphalt under different strain number of times, and it is rational in infrastructure, simple operation, suitable for popularization and application.
Description
Technical field
The utility model is related to a kind of material property determination test instrument, refers specifically to a kind of strained for asphalt and determines
Test instrument.
Background technology
From ancient times to the present, road is all one of most important infrastructure of human society.With economical further development, people
To proposing higher requirement in terms of road travel comfort level and later maintenance；So that asphalt concrete road arises at the historic moment,
Asphalt turns into most widely used pavement material.Asphalt concrete road has compared with general cement concrete road
The laying time is short, cost is low, and travel safety is high, noise is small, the advantage such as local failure is easily repaired.In actual use we
It was found that, part asphalt concrete road occurs as soon as the road surfaces such as crack, loose, pit, rut within the service life of design
Phenomenon is damaged, causing the pavement performance of bituminous paving reduces, and is that traffic safety brings huge hidden danger.Drip is come from such infringement more
The problems such as blue or green mix proportion design is unreasonable, construction technology is poor, cause road be vulnerable to the environmental factors such as rainfall, high temperature and
The infringement of the human factors such as vehicle-mounted increase, vehicle flowrate rapid growth.To improve case above, it is necessary in advance to asphalt
Mix-design and Asphalt Pavement Construction Quality carry out indoor Work condition analogue research.
In new edition《Highway engineering pitch and Asphalt Mixture Experiment code》（JTG-E2011）In on asphalt
Laboratory test mainly has following several：Uniaxial compression, uniaxial tension, freeze-thaw split, triaxial compressions, single shaft dynamic modulus, 4 points
Flexible life, Marshall stability, wheel tracking test etc..Above method is more to simulate pitch with single shaft, three axles or Multi-point Simple
Road surface stressing conditions, and actual road surface is carried as multiaxis stress.Research finds that wheel tracking test is rolled with actual wheel by contrast
Operating mode is closest：The essence of wheel tracking test is that in certain circumstances, load is 0.7Mpa roller in 300mm*300mm*
Round strain campaign is done along straight line on 50^100mm cuboid test block plates.It can preferably simulating vehicle in road traveling, car
Take turns the process of rolling road surface；But wheel tracking test is that under dead load, constant temperature, wheel comes and goes along straight line and rolls test block, with vehicle on road
Complicated, the changeable actual condition travelled on face is not inconsistent, and it can only measure wheel and roll strain number of times and asphalt examination
The relation of block axial deformation, can not reflect as polytropic temperature, irregular rainfall, turn inside diameter, asphalt unidirectionally by
Actual condition under the conditions of rolling friction etc..
Marshall Test, is the most important test method of measurement asphalt stability generally acknowledged both at home and abroad at present, is
Strain one of final evaluating apparatus of experiment.In process of the test, φ 101.6mm*63.5mm cylinder test block is placed on regulation mould
It is radially compressed in tool, judge whether asphalt meets specification under corresponding strain number of times by the relation of load and flow valuve and want
Ask；This experiment is examined for the mix-design and Asphalt Pavement Construction Quality of asphalt and provides reliable foundation.But,
This experiment can not be measured to sample strain process variable so that the evaluation result of Marshall Test is excessively dull.
This strain test instrument is inspired and is improved through existing vehicle tracking test instrument, and the simulating vehicle that can try one's best is on road
The actual condition of upper traveling, strain number of times and the pass of strain performance of test block are evaluated then in conjunction with the experiment of Marshall stability
System；Be can bound bitumen compound strain experiment and stability test comprehensive test instrument, can effectively improve pitch mixing
The precision of the indoor Work condition analogue experiment of material.
Utility model content
For above-mentioned technical problem, the utility model provides a kind of asphalt strain test instrument, is allowed to maximum journey
Degree it is close with actual road conditions, be it is a kind of can bound bitumen compound strain experiment and stability test comprehensive test
Instrument, effectively increases the precision that Work condition analogue is tested in asphalt room.
The utility model is achieved through the following technical solutions：
Test block is provided with a kind of asphalt strain test instrument, including experiment instrument body, the experiment instrument body to consolidate
Determine device, the loading test wheel run along test block plane and experiment wheel drive unit, the test block fixing device includes die trial,
The die trial is cylindrical die, and some die trials closely link the die trial to form oval racetrack structure and be fixed on organism bottom
On objective table, be fixed with the cylindrical test block being adapted with its physical dimension in each die trial, loading test wheel by installed in
The experiment wheel drive unit of body upper rolls operation along test block upper surface ring.
As the prioritization scheme of this case, the die trial bottom is provided with 3 and heightens nut, utilizes the principle of " 3 points of one sides "
The upper surface for adjusting test block is in same level.
As the prioritization scheme of this case, the die trial is the cylindrical die being spliced by two semicircular.
As the prioritization scheme of this case, the cylindrical test block uses Marshall reference block, and dimensions is φ
101.6*63.5mm。
As the prioritization scheme of this case, the experiment wheel drive unit includes wheel load engine, travelling gear and transmission belt,
Wheel load engine is by bearing band nutating gear uniform rotation, travelling gear and with tooth transmission belt engaged transmission, loading test
Wheel is connected with transmission belt by power transmission shaft and is correspondingly arranged along track unidirectional operation, the track and the die trial of oval racetrack.
As the prioritization scheme of this case, the loading test wheel regulates and controls load pressure, hydraulic means bag by hydraulic means
Include the hydraulic press and hydraulic press on power transmission shaft.
As the prioritization scheme of this case, be provided with water jet on the upper end body of the die trial, water jet by pipeline with
The tank connection on the outside of body is arranged on, is realized from trend test block surface water spray.
As the prioritization scheme of this case, heating controller is symmetrically arranged with the both sides inwall of the experiment instrument body.
As the prioritization scheme of this case, test block altitude datum line is additionally provided with the test instrument body inner wall.
The beneficial effects of the utility model are：
1st, test block is connected into oval racetrack structure so that pavement behavior diversification, turn inside diameter, roller can be carried out
The unidirectional strain experiment for rolling test block；The strain experiment of straight reciprocating motion can only be reflected by solving existing rut test-run a machine, truly
Ground reduces actual condition of the vehicle in road traveling, is the main distinction and main innovation of this test instrument and existing rut test-run a machine
Point；
2nd, cylindrical structural used in Marshall Test is taken in die trial so that test block can be after after strain experiment is carried out
It is continuous to carry out Marshall stability test, so as to detect the intensity index of the asphalt under different strain number of times so that examination
Test result more convincing；Cylindrical test block saves making raw material compared to cuboid test block, reduces experimentation cost, simplifies
The operational sequence such as install, dismantle, rolling；
3rd, die trial reasonable in design, can prevent from causing loading test wheel to produce punching because indivedual test block axial deformations are excessive
Load is hit, test block height can be adjusted again, to ensure that the height in each test block face in strain process of the test is identical；
4th, test block load pressure is regulated and controled by hydraulic means, because different vehicle road pavements load not
Together, the load of this test instrument can be divided into the gear of " high, medium and low " three, to simulate actual condition, overcome existing roller load general
For fixed value, it is impossible to regulate and control load, not the problem of not being inconsistent with normal road condition load；
5th, by setting automatic sprinkling filter, in wheel tracking test to test block carry out uniformly spread water, with simulate natural precipitation,
The strain experiment under the natural environmental conditions such as water is spread in municipal administration；
6th, it is rational in infrastructure, simple operation, with preferable market value and economic benefit, suitable for popularization and application.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model asphalt strain test instrument；
Fig. 2 is the structural representation of die trial in the utility model asphalt strain test instrument；
Fig. 3 is the connection diagram of die trial in the utility model asphalt strain test instrument；
Fig. 4 is the structural representation of experiment wheel drive unit in the utility model asphalt strain test instrument；
In figure：1- tests instrument body, 2- carrying disks, 3- die trial objective tables, 4- die trials, 5- test blocks, 6- loading test wheels, 7-
Heighten nut, 8- wheel load engines, 9- travelling gears, 10- transmission belts, 11- tracks, 12- hydraulic presses, 13- hydraulic presses, 14- sprays
Hydrophone, 15- tanks, 16- heating controllers, 17- test block altitude datum lines.
Embodiment
The utility model and its effect are further elaborated below in conjunction with drawings and Examples.
As Figure 1-4, a kind of asphalt strain test instrument, including experiment instrument body 1, the experiment instrument body 1
Test block fixing device, the loading test wheel run along test block plane and experiment wheel drive unit are inside provided with, the test block is consolidated
Determine to be fixed with die trial objective table 3, die trial objective table 3 on the carrying disk 2 that device includes being located at organism bottom, carrying disk 2 and fix
There is die trial 4, the die trial 4 is cylindrical die, and closely link forms oval racetrack structure and is fixed on die trial for some die trials 4
On objective table 3, the cylindrical test block 5 being adapted with its physical dimension is fixed with each die trial 4, loading test wheel 6 passes through peace
Experiment wheel drive unit mounted in body upper along the upper surface ring of test block 5 rolls operation.
Generally, the temperature of wheel tracking test is 60 DEG C, and the roller for being 0.7Mpa with load is in 300mm*300mm*50^
The vertical deformation that test block can be automatically determined in round strain campaign, process of the test and experiment temperature are done in 100mm cuboid test blocks
Degree.First, the cuboid test block used in wheel tracking test, material quantity needed for making is big, test block installation, the operation such as dismantles, rolls all
Need to complete by specific mechanical, cost is high；Secondly, the roller load generally fixed value used, it is impossible to regulate and control load big
It is small, thus be not inconsistent with normal road condition load；In addition, the rut under the natural conditions such as rainy day, surface gathered water can not be simulated in experiment
Situation, and turn inside diameter can not be simulated；Finally, roller is comes and goes strain motion, with China vehicle one-way traffic
Actual strain is not inconsistent.
Compared with above-mentioned existing vehicle tracking test instrument, this case replaces existing first by the cylindrical test block of Marshall Test
Cuboid test block carry out strain experiment, and test block is connected into oval racetrack structure.Its beneficial effect has：
（1）Die trial is bold in shape to take horse together with cylindrical structure used in your experiment so that test block is being carried out
It can proceed Marshall stability test after strain experiment, be reduced by most real operating mode, so as to detect in difference
Strain the intensity index of asphalt under number of times, i.e., same sample by wheel strain number of times and axial deformation, radial force and
The relation of deformation so that result of the test is more convincing.In addition, cylindrical test block saves making original compared to cuboid test block
Material, reduces experimentation cost, the operational sequence such as simplifies installation, dismantle, roll.
（2）Test block production, installation and removal：Required test block uses standard Marshall test block, and dimensions is φ 101.6*
63.5mm, making only needs to use marshall compaction instrument and ingot stripper, is directly introduced in strain testing machine mould, treats after the demoulding
Wheel tracking test takes out after finishing, it is not necessary to dismantled, mold clean, and convenient and swift, cost is lower.
（3）Die trial edge is closely coupled, and load is unified：The form for taking close-packed arrays connected between die trial, concrete form
The cylindrical die that can be spliced by two semicircular；In strain process of the test, this is designed to effectively prevent indivedual test block axles
Loading test wheel is caused to produce impact load to deformation is excessive（Jolt）, and then punching failure is produced to the edge of other test blocks.
（4）The highly regulated device of test block：The standard-bred that marshall compaction instrument is produced is 63.5 together with your test block height in hand
± 1.3mm, because of factors such as human factor, testing equipment differences so that the test block produced highly has different certainly.Cause
It is levelling to the test block progress surface layer of different height using " 3 points of one sides " principle and the bottom of die trial 4 is provided with 3 and heightens nut,
To ensure to be in same level in each initial test block face of strain experiment.
（5）Wheel unidirectionally strains：Kept to the right during China's vehicle traveling, it may also be said to which the strain of wheel road pavement is all the time
It is unidirectional, the test block face that loading test wheel is travelled is designed to oval racetrack structure, enables loading test wheel court
The motion of direction, it is to avoid the situation of wheel back and forth movement in existing wheel tracking test, it is properer with actual condition.
（6）Wheel tracking test is carried out to bend：Roller is rolled around along straight line during current wheel tracking test, is not considered
The wheel tracking test of bend.Test block face is designed to oval racetrack structure, including the test block at circular arc curve, thus can be abundant
Reflect vehicle turning when road pavement influence.
Further, experiment wheel drive unit includes wheel load engine 8, travelling gear 9 and transmission belt 10, wheel load engine
8 by the bearing band uniform rotation of nutating gear 9, travelling gear 9 and with the engaged transmission of tooth transmission belt 10, and loading test wheel 6 leads to
Cross power transmission shaft to be connected with transmission belt 10 and along the unidirectional operation of track 11, track 11 is corresponding with the die trial 4 of the oval racetrack to be set
Put；Loading test wheel 6 regulates and controls load pressure by hydraulic means, and hydraulic means includes the He of hydraulic press 12 being arranged on power transmission shaft
Hydraulic press 13.Test block load pressure is regulated and controled by hydraulic means, because the load of different vehicle road pavements is different,
The load of this test instrument can be divided into the gear of " high, medium and low " three, to simulate actual condition, overcome existing roller load to be generally
Fixed value, it is impossible to regulate and control load, the problem of not being inconsistent with normal road condition load.Wherein, loading test wheel 6 can also be by except liquid
Other devices regulation and control load pressure outside pressure device, is not restricted by herein.
Further, water jet 14 is provided with the upper end body of the die trial 4, water jet 14 is by pipeline with setting
Tank 15 on the outside of body is connected, and is realized from the surface sprinkling of trend test block 5.Because the labor of water road pavement is spread in natural precipitation, municipal administration
Damage destruction to have a certain impact, by setting automatic sprinkling filter, may be implemented in wheel tracking test and test block is carried out uniformly to spread water,
The strain experiment for having water to realize road pavement is simulated.In addition, it is symmetrically arranged with the both sides inwall of experiment instrument body 1
Heating controller 16, the temperature that can be heated, detect in experiment instrument body 1, being symmetrical arranged two can ensure that whole experiment is empty
Between without temperature difference.It is additionally provided with the madial wall for testing instrument body 1 for whether the upper surface of auxiliary observation test block 5 to be in same water
The test block altitude datum line 17 of plane.
Cylindrical test block has two kinds of dimensions φ 101.6*63.5mm and φ 152.4* used in Marshall Test
95.3, the former is typically selected according to road deck scantling.During experiment, reference block, which is put into, to be put into horse after two hours in water and has a rest
You are tested testing machine, obtain load and the curve of flow valuve.Using the test block of this test instrument after strain experiment, it can proceed with
Horse is tested together with you, according to different strain number of times are set, so as to detect the intensity of the asphalt under different strain number of times
Index, makes result of the test more convincing.
The operating process of this test instrument：
1. the making of test block：The cylinder that method obtains φ 101.6*63.5mm is infiltrated by marshall compaction instrument or road surface
Test block.
2. test block installation：The test block made is put into one by one in the die trial that height is 55.0mm, and adjusts die trial one by one
The nut progress test block of heightening of bottom is highly adjusted, it is ensured that each test block height and test block altitude datum line level.
3. strain experiment：Strained before on-test, from main regulation test temperature, experiment wheel pressure, rolling speed, roll time
Number etc.；If carrying out rainy day wheel tracking test, it need in the sink add water, be sprayed water by water jet to test block surface in advance.Open instrument
Device switch, wheel load driven by engine travelling gear uniform rotation, travelling gear with tooth transmission belt engaged transmission, loading test wheel
It is connected by power transmission shaft with transmission belt and along the unidirectional operation of track 11, so that the purpose for rolling test block is reached, setting to be achieved
Roll the axial deformation that test block is measured after strain number of times.
4. Marshall stability test：The test block rolled after strain is removed, Marshall stability test machine is attached to and enters
Row Marshall steady testing, respectively obtains the curve of each test block flow valuve and load.
Above example is only exemplary, can't limit to the utility model, it should be pointed out that for the technology of this area
The other equivalent modifications made for personnel under technical inspiration provided by the utility model and improvement, are regarded as this
The protection domain of utility model.
Claims (9)
- Test block is provided with the test instrument 1. a kind of asphalt strains, including experiment instrument body, the experiment instrument body to fix Device, the loading test wheel run along test block plane and experiment wheel drive unit, the test block fixing device include die trial, its It is characterised by：The die trial（4）For cylindrical die, some die trials（4）Close link forms oval racetrack structure and fixation In the die trial objective table of organism bottom（3）On, each die trial（4）Inside it is fixed with the cylindrical test block being adapted with its physical dimension （5）, loading test wheel（6）By the experiment wheel drive unit installed in body upper along test block（5）Upper surface ring rolls fortune OK.
- The test instrument 2. asphalt according to claim 1 strains, it is characterised in that：The die trial（4）Bottom is set There are 3 to heighten nut（7）, utilize the principle adjustment test block of " 3 points of one sides "（5）Upper surface be in same level.
- The test instrument 3. asphalt according to claim 1 strains, it is characterised in that：The die trial（4）It is by two halves The cylindrical die that circle is spliced.
- 4. according to any described asphalt strain test instruments of claim 1-3, it is characterised in that：The cylindrical test block （5）Using Marshall reference block, dimensions is φ 101.6*63.5mm.
- 5. according to any described asphalt strain test instruments of claim 1-3, it is characterised in that：The experiment wheel drive Device includes wheel load engine（8）, travelling gear（9）And transmission belt（10）, wheel load engine（8）Driving cog is driven by bearing Wheel（9）Uniform rotation, travelling gear（9）With band tooth transmission belt（10）Engaged transmission, loading test wheel（6）By power transmission shaft with passing Dynamic band（10）Connect and along track（11）Unidirectional operation, the track（11）With the die trial of oval racetrack（4）It is correspondingly arranged.
- The test instrument 6. asphalt according to claim 5 strains, it is characterised in that：The loading test wheel（6）It is logical Hydraulic means regulation and control load pressure is crossed, hydraulic means includes the hydraulic press being arranged on power transmission shaft（12）And hydraulic press（13）.
- 7. according to any described asphalt strain test instruments of claim 1-3, it is characterised in that：The die trial（4）'s Water jet is provided with the body of upper end（14）, water jet（14）Pass through pipeline and the tank being arranged on the outside of body（15）Connection, Realize from trend test block（5）Surface sprinkling.
- 8. according to any described asphalt strain test instruments of claim 1-3, it is characterised in that：The experiment instrument body （1）Both sides inwall on be symmetrically arranged with heating controller（16）.
- 9. according to any described asphalt strain test instruments of claim 1-3, it is characterised in that the experiment instrument body （1）Test block altitude datum line is additionally provided with madial wall（17）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720034049.8U CN206362651U (en) | 2017-01-12 | 2017-01-12 | A kind of asphalt strain test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720034049.8U CN206362651U (en) | 2017-01-12 | 2017-01-12 | A kind of asphalt strain test instrument |
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| Publication Number | Publication Date |
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| CN206362651U true CN206362651U (en) | 2017-07-28 |
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ID=59380140
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720034049.8U Expired - Fee Related CN206362651U (en) | 2017-01-12 | 2017-01-12 | A kind of asphalt strain test instrument |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051314A (en) * | 2017-12-01 | 2018-05-18 | 长安大学 | The experimental rig of the lower asphalt pavement crack of various factors coupling effect and fracture development |
| CN109459502A (en) * | 2018-12-03 | 2019-03-12 | 森松（江苏）重工有限公司 | A kind of support frame for holding multiple pieces TOFD reference block |
| CN110618050A (en) * | 2019-09-27 | 2019-12-27 | 长安大学 | Base material washout test device based on wheel load |
| CN112629876A (en) * | 2020-12-03 | 2021-04-09 | 中国地质大学（武汉） | Ground vehicle load simulation realization device in physical model test |
-
2017
- 2017-01-12 CN CN201720034049.8U patent/CN206362651U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051314A (en) * | 2017-12-01 | 2018-05-18 | 长安大学 | The experimental rig of the lower asphalt pavement crack of various factors coupling effect and fracture development |
| CN108051314B (en) * | 2017-12-01 | 2021-07-27 | 长安大学 | Test device for asphalt pavement cracks and crack development under multi-factor coupling effect |
| CN109459502A (en) * | 2018-12-03 | 2019-03-12 | 森松（江苏）重工有限公司 | A kind of support frame for holding multiple pieces TOFD reference block |
| CN110618050A (en) * | 2019-09-27 | 2019-12-27 | 长安大学 | Base material washout test device based on wheel load |
| CN112629876A (en) * | 2020-12-03 | 2021-04-09 | 中国地质大学（武汉） | Ground vehicle load simulation realization device in physical model test |
| CN112629876B (en) * | 2020-12-03 | 2021-10-26 | 中国地质大学（武汉） | Ground vehicle load simulation realization device in physical model test |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20170728 Termination date: 20190112 |