CN105823725A - Testing device and testing method for measuring road surface friction attenuation rate of snow-melting agent under low-temperature environment - Google Patents
Testing device and testing method for measuring road surface friction attenuation rate of snow-melting agent under low-temperature environment Download PDFInfo
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- CN105823725A CN105823725A CN201610331616.6A CN201610331616A CN105823725A CN 105823725 A CN105823725 A CN 105823725A CN 201610331616 A CN201610331616 A CN 201610331616A CN 105823725 A CN105823725 A CN 105823725A
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 238000002844 melting Methods 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 49
- 238000010998 test method Methods 0.000 claims description 12
- 238000003556 assay Methods 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000006200 vaporizer Substances 0.000 claims description 4
- 241000372132 Hydrometridae Species 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 206010039203 Road traffic accident Diseases 0.000 abstract 1
- 239000005413 snowmelt Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- Automation & Control Theory (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention provides a testing device and testing method for measuring the road surface friction attenuation rate of a snow-melting agent under the low-temperature environment .The testing device is composed of a testing box and a road surface friction coefficient measuring device .The road surface friction attenuation rate of the snow-melting agent under the low-temperature environment is measured by building a road surface testing table and controlling the temperature in the testing box .The testing device is used in the testing method .The method includes the three steps of test preparation, measurement and result sorting .Testing results obtained through the testing device and the testing method are accurate, stable and reliable and can truly reflect changes of anti-slip performance of a road surface after the snow-melting agent is used, advantages are remarkable, and the preferential road snow-melting agent plays an important role in improving road driving safety and reducing traffic accidents.
Description
Technical field
The invention belongs to the snow melt clearing ice technology field of urban road, airport roadway and highway etc., it is specifically related to one and can measure under low temperature environment fast and accurately, characterize assay device and the test method of the pavement friction attenuation rate index of Snow Agent road pavement antiskid performance impact.
Background technology
The highways and streets of China's most area and airport roadway etc. the most all can be affected by ice and snow.The accumulated snow of road freezes and does not only result in interruption of communication, is also easy to cause vehicle accident, brings serious economy and life and property loss.At present, using most snow melt deicing modes to dispense Snow Agent exactly in worldwide, according to incompletely statistics, the whole world is annual about uses 30,000,000 tons of Snow Agent, and Snow Agent consumption also presents the trend being gradually increased.
Spread Snow Agent can reduce the antiskid performance on road surface, for guarantee driving safety, utilizes pavement friction attenuation rate index characterization and the impact of specification Snow Agent road pavement antiskid performance in China's road deicing Snow Agent national standard (GB/T23851-2009).Wherein, measuring the method for Snow Agent pavement skid resistance attenuation rate is to use pendulum-type friction instrument to measure on-the-spot bituminous paving before and after spread Snow Agent solution, cement concrete pavement or the antiskid value of indoor test specimen respectively, and then calculates the frictional attenuation rate on road surface after spread Snow Agent.Applicant, on the basis of lot of experiments, analyzes above-mentioned test method and there is following defect: (1) Snow Agent is mainly used in road snow melt deicing in winter, and during use, ambient temperature is relatively low, and existing assay device and method do not consider the most uncontrollable test temperature.Test data shows, the pavement skid resistance condition after spread Snow Agent is had a significant impact by ambient temperature.(2) in the test operation using pendulum friction coefficient determinator, must catch owing to accommodating the moment fallen, whole device can be allowed to produce vibration, and accuracy of reading is affected relatively big by operator, additionally, there may be the shortcoming such as pressure calibration difficulty, test result repeatability difference.
Summary of the invention
The problem existed for above-mentioned test method, it is an object of the invention to provide a kind of assay device that can measure Snow Agent pavement friction attenuation rate under low temperature environment and test method, the decay indices of antiskid performance after pavement of road spread Snow Agent in winter under the conditions of actual temperature can be measured fast and accurately by these apparatus and method.
For achieving the above object, the present invention measures the assay device of Snow Agent pavement friction attenuation rate under low temperature environment and it is characterized in that, including proof box and the surface friction coefficient determinator that can control ambient temperature.Can fix pavement test platform bottom described proof box, including bituminous paving and cement pavement testing stand two kinds, identical with actual bituminous paving or cement concrete pavement surface material therefor, described surface friction coefficient determinator is placed on pavement test platform.
Proof box includes control system, motor, reservoir, compressor, condenser, vaporizer, and bottom is provided with universal wheel, and described control system is placed in inside proof box, and is provided with display screen on the left of proof box.Described motor uses servomotor, adopts and is bolted to proof box bottom left.
Surface friction coefficient determinator is made up of pavement test platform, strain gauge, slide block, the horizontal metroscope that tests the speed.The size of described pavement test platform is 180cm*30cm*5cm, including bituminous paving and cement pavement two kinds, is made up of asphalt and two kinds of different kind of material of cement concrete respectively, identical with real road surface layer material therefor, construction depth.Described slide block is balancing weight, and quality is 1kg, and side is furnished with hook, and slider bottom is fixed with rubber layer.Described strain gauge is connected with control system by data wire.
A kind of measure the test method of Snow Agent pavement friction attenuation rate under low temperature environment, it is characterised in that utilize above-mentioned assay device, follow the steps below:
(1) test prepares
1. bituminous paving testing stand or cement pavement testing stand are moved in proof box, install and leveling；
2. slide block is placed in centre position on the right side of pavement test platform, connects strain gauge.
(2) measure
1. by 300ml water spread on pavement test platform, blend rubber plate strikes off so that it is surface uniform fold water membrane；
2. the speed of service is set as 4m/min, starts test and record frictional force f when slide block reaches at the uniform velocity1, as slide block does not reaches at the uniform velocity, the speed of service need to be adjusted and again test；
3. the water on pavement test platform surface is cleaned, and treat that it is completely dried；
4. setting proof box temperature, preparation 300ml Snow Agent solution is also poured in beaker, places 30min in proof box；
5., by whole for Snow Agent solution spreads on pavement test platform, strike off with rubber slab, be allowed to uniform fold；
6. the speed of service is set as 4m/min, starts test and record frictional force f when slide block reaches at the uniform velocity2, such as slide block the most at the uniform velocity, the speed of service need to be adjusted and again test.
(3) result arranges
Before and after spread Snow Agent, the coefficient of friction on road surface, in terms of μ, calculates as follows:
In formula:
μ-surface friction coefficient；
The frictional force that f-measures
The pavement friction attenuation rate of Snow Agent, in terms of M, calculates as follows:
In formula:
The pavement friction attenuation rate of M-Snow Agent；
f1The frictional force that-spray water measures；
f2The frictional force that-spraying snow-melting agent solution measures.
Traditional pendulum type friction instrument be according to " elevation loss of pendulum equal to be installed on swing arm end sheet rubber slip over road surface time, overcome pavement friction work done " principle make, its measurement result is pendulum value (BPN), can get friction co-efficient value divided by 100；And the principle that the present invention is basis " frictional force is directly proportional to normal pressure and the coefficient of kinetic friction " is made, by measuring frictional force when there is relative slip between slide block and testing stand and the ratio of slide block weight, it is surface friction coefficient.Compare pendulum-type coefficient of friction instrument, the present invention have simple to operate, certainty of measurement is high, fireballing feature:
(1) by proof box Control experiment temperature, can measure the pavement friction attenuation rate under low temperature environment, more be consistent with the use environment of actual Snow Agent, result of the test is more meaningful；
(2) use servomotor traction slide block, be accurately controlled ram speed and precision, there is moment startup and quick stopping feature simultaneously, make measuring friction coefficient result the most accurate.
Accompanying drawing explanation
Fig. 1 be the present invention measure the structural representation of Snow Agent pavement friction attenuation rate assay device under low temperature environment；Fig. 2 is the front view of surface friction coefficient determinator；Fig. 3 is the top view of surface friction coefficient determinator；Fig. 4 is the structural representation of slide block.Wherein: 1 display screen；2 control systems；3 motors；4 reservoirs；5 universal wheels；6 test the speed horizontal metroscope；7 road surface model；8 compressors；9 leveling serews；10 condensers；11 strain gauges；12 rubber layers；13 osculums；14 balancing weights；15 data wires；16 heat-insulation layers；17 vaporizers.
Detailed description of the invention
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
As it is shown in figure 1, give the present invention to measure the structural representation of the device of Snow Agent pavement friction attenuation rate under low temperature environment, including the proof box and the surface friction coefficient measurement apparatus that provide low-temperature test environment.Described proof box includes control system 2, motor 3, reservoir 4, compressor 8, condenser 10, vaporizer 17 forms, and universal wheel 5 it is provided with in bottom, described control system 2 is placed in inside proof box, and on the left of proof box, it is provided with display screen 1, described reservoir 4, compressor 8, condenser 10 is placed on the base plate of proof box bottom of cabinet bulk, described vaporizer 17 is placed in back, proof box operating room, described motor 3 is placed on the left of proof box chamber bottom, and it is provided with heat-insulation layer 16 between operating room, the described length measurement sensor 6 that tests the speed is placed in proof box chamber bottom, described proof box chamber bottom is provided with leveling serew 9, bottom right is provided with osculum 13.
As shown in Figure 2 and Figure 3, sets forth front view and the top view of surface friction coefficient measurement apparatus, including road surface model 7, strain gauge 11, data wire 15, breed fast 14 and rubber layer 12 form.Described road surface model 7 a size of 180cm*30*5cm, uses asphalt making and cement concrete to build two kinds, is positioned on 6 leveling serews 9 of proof box chamber bottom, and described strain gauge 11 is connected with control system 2 by data wire 15.
As shown in Figure 4, giving the structural representation of slide block, described slide block is balancing weight 14, and quality is 1kg, and slider bottom is provided with rubber layer 12, with simulated automotive tire effect.
When testing, motor 3 starts rapidly after receiving signal, and traction slide block 14 is at the uniform velocity to move to motor 3 direction, when being arranged on the horizontal metroscope 6 that tests the speed on the right side of motor 3 and the slide block 14 distance with motor 3 being detected less than 25cm, motor 3 quits work, and slide block 14 stops sliding.
The embodiment of test method:
For verifying the assay device of Snow Agent pavement friction attenuation rate under low temperature environment of the present invention and the reliability of test method and beneficial effect, below in conjunction with embodiment, the present invention is described in more detail, but the invention is not restricted to following example.
Concrete test procedure is as follows:
(1) test prepares
1. bituminous paving testing stand or cement pavement testing stand are moved in proof box, install and leveling；
2. slide block is placed in centre position on the right side of pavement test platform, connects strain gauge.
(2) measure
1. by 300ml water spread on pavement test platform, blend rubber plate strikes off so that it is surface uniform fold water membrane；
2. the speed of service is set as 4m/min, starts test and record frictional force f when slide block reaches at the uniform velocity1, as slide block does not reaches at the uniform velocity, the speed of service need to be adjusted and again test；
3. the water on pavement test platform surface is cleaned, and treat that it is completely dried；
4. setting proof box temperature, preparation 300ml Snow Agent solution is also poured in beaker, places 30min in proof box；
5., by whole for Snow Agent solution spreads on pavement test platform, strike off with rubber slab, be allowed to uniform fold；
6. the speed of service is set as 4m/min, starts test and record frictional force f when slide block reaches at the uniform velocity2, such as slide block the most at the uniform velocity, the speed of service need to be adjusted and again test.
(3) result arranges
It is respectively adopted 20% sodium chloride, 20% potassium acetate and 3 kinds of different Snow Agent of certain liquid Snow Agent to test, and according to below equation calculating pavement friction attenuation rate:
In formula:
The pavement friction attenuation rate of M-Snow Agent；
f1The frictional force that-spray water measures；
f2The frictional force that-spraying snow-melting agent solution measures.
The pavement friction attenuation rate result of the test of all kinds of Snow Agent is shown in Table 1.
The pavement friction attenuation rate result of the test table of table 1 Snow Agent
Result of the test shows: at a temperature of varying environment, and the pavement friction attenuation rate of same Snow Agent is different, and ambient temperature has appreciable impact to the coefficient of friction on road surface after spread Snow Agent；The pavement friction attenuation rate of variety classes Snow Agent is different.Pavement friction attenuation rate by the assay device of the present invention Yu determination of test method Snow Agent, it is possible to the impact of reflection Snow Agent road pavement antiskid performance, test result is accurate, stable, reliable, and discrimination is high.The assay device of the present invention and test method can preferably go out the Snow Agent that road pavement antiskid performance impact is less, while improving snow melt deicing efficiency, it is ensured that road traffic safety.
It should be noted that above example is merely to understand the present invention, the invention is not restricted to this embodiment, interpolation, equivalent or the amendment of all technical characteristics made on the basis of technical scheme, be regarded as protection scope of the present invention.
Claims (4)
1. one kind measures the device of Snow Agent pavement friction attenuation rate under low temperature environment, it is characterised in that be made up of the proof box and surface friction coefficient determinator that can control ambient temperature.
Proof box the most according to claim 1, it is characterised in that include control system, motor, reservoir, compressor, condenser, vaporizer, bottom is provided with universal wheel, and described control system is placed in inside proof box, and is provided with display screen on the left of proof box.Described motor uses servomotor, adopts and is bolted to proof box bottom left.
Surface friction coefficient determinator the most according to claim 1, it is characterised in that be made up of pavement test platform, strain gauge, slide block, the horizontal metroscope that tests the speed.The size of described pavement test platform is 180cm*30cm*5cm, including bituminous paving and cement pavement two types, is made up of asphalt and two kinds of different kind of material of cement concrete respectively, identical with real road surface layer material therefor, construction depth.Described slide block is balancing weight, and quality is 1kg, and side is furnished with hook, and slider bottom is fixed with rubber layer.Described strain gauge is connected with control system by data wire.
4. one kind measures the test method of Snow Agent pavement friction attenuation rate under low temperature environment, it is characterised in that utilizes assay device, follows the steps below:
(1) test prepares
1. bituminous paving testing stand or cement pavement testing stand are moved in proof box, install and leveling；
2. slide block is placed in centre position on the right side of pavement test platform, connects strain gauge.
(2) measure
1. by 300ml water spread on pavement test platform, blend rubber plate strikes off so that it is surface uniform fold water membrane；
2. the speed of service is set as 4m/min, starts test and record frictional force f when slide block reaches at the uniform velocity1, as slide block does not reaches at the uniform velocity, the speed of service need to be adjusted and again test；
3. the water on pavement test platform surface is cleaned, and treat that it is completely dried；
4. setting proof box temperature, preparation 300ml Snow Agent solution is also poured in beaker, places 30min in proof box；
5., by whole for Snow Agent solution spreads on pavement test platform, strike off with rubber slab, be allowed to uniform fold；
6. the speed of service is set as 4m/min, starts test and record frictional force f when slide block reaches at the uniform velocity2, such as slide block the most at the uniform velocity, the speed of service need to be adjusted and again test.
(3) result arranges
Before and after spread Snow Agent, the coefficient of friction on road surface, in terms of μ, calculates as follows:
In formula:
μ-surface friction coefficient；
The frictional force that f-measures
The pavement friction attenuation rate of Snow Agent, in terms of M, calculates as follows:
In formula:
The pavement friction attenuation rate of M-Snow Agent；
f1The frictional force that-spray water measures；
f2The frictional force that-spraying snow-melting agent solution measures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610331616.6A CN105823725B (en) | 2016-05-11 | 2016-05-11 | The test method of deicing salt pavement friction attenuation rate under a kind of measurement low temperature environment |
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| CN201610331616.6A CN105823725B (en) | 2016-05-11 | 2016-05-11 | The test method of deicing salt pavement friction attenuation rate under a kind of measurement low temperature environment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106742559A (en) * | 2016-12-21 | 2017-05-31 | 南京航空航天大学 | A kind of low temperature friction wear testing machine double-layer heat insulation body structure |
| CN107167394A (en) * | 2017-05-27 | 2017-09-15 | 上海海事大学 | A kind of polar region ship plate ultralow temperature frictional experiment system |
| CN107525739A (en) * | 2017-08-22 | 2017-12-29 | 山东交通学院 | A kind of experimental rig and test method for determining the minimum temperature in use of liquid Snow Agent |
| CN107655825A (en) * | 2017-11-18 | 2018-02-02 | 哈尔滨工业大学（威海） | A kind of rubber for tire high speed ice face frictional behavior test device |
| CN108169121A (en) * | 2018-03-07 | 2018-06-15 | 山东交通学院 | A kind of full-automatic surface friction coefficient pilot system |
| CN110044813A (en) * | 2019-04-11 | 2019-07-23 | 东南大学 | A kind of detection method of frost region bituminous pavement wide temperature field coefficient of friction |
| CN107300523B (en) * | 2017-06-27 | 2023-10-31 | 山东交通学院 | Road surface dynamic-static friction coefficient measuring device under indoor and outdoor multi-environment state |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106742559A (en) * | 2016-12-21 | 2017-05-31 | 南京航空航天大学 | A kind of low temperature friction wear testing machine double-layer heat insulation body structure |
| CN106742559B (en) * | 2016-12-21 | 2018-02-09 | 南京航空航天大学 | A kind of low temperature friction wear testing machine double-layer heat insulation body structure |
| CN107167394A (en) * | 2017-05-27 | 2017-09-15 | 上海海事大学 | A kind of polar region ship plate ultralow temperature frictional experiment system |
| CN107300523B (en) * | 2017-06-27 | 2023-10-31 | 山东交通学院 | Road surface dynamic-static friction coefficient measuring device under indoor and outdoor multi-environment state |
| CN107525739A (en) * | 2017-08-22 | 2017-12-29 | 山东交通学院 | A kind of experimental rig and test method for determining the minimum temperature in use of liquid Snow Agent |
| CN107525739B (en) * | 2017-08-22 | 2023-08-29 | 山东交通学院 | Test device and test method for determining minimum use temperature of liquid snow-melting agent |
| CN107655825A (en) * | 2017-11-18 | 2018-02-02 | 哈尔滨工业大学（威海） | A kind of rubber for tire high speed ice face frictional behavior test device |
| CN108169121A (en) * | 2018-03-07 | 2018-06-15 | 山东交通学院 | A kind of full-automatic surface friction coefficient pilot system |
| CN108169121B (en) * | 2018-03-07 | 2023-08-25 | 山东交通学院 | Full-automatic road surface friction coefficient test system |
| CN110044813A (en) * | 2019-04-11 | 2019-07-23 | 东南大学 | A kind of detection method of frost region bituminous pavement wide temperature field coefficient of friction |
| CN110044813B (en) * | 2019-04-11 | 2020-08-11 | 东南大学 | Method for detecting wide-temperature-range friction coefficient of bituminous pavement in frozen region |
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