CN105823725B - A test method for determining the friction attenuation rate of snow-melting agent pavement in low temperature environment - Google Patents
A test method for determining the friction attenuation rate of snow-melting agent pavement in low temperature environment Download PDFInfo
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- CN105823725B CN105823725B CN201610331616.6A CN201610331616A CN105823725B CN 105823725 B CN105823725 B CN 105823725B CN 201610331616 A CN201610331616 A CN 201610331616A CN 105823725 B CN105823725 B CN 105823725B
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- 238000010998 test method Methods 0.000 title claims abstract description 16
- 238000002844 melting Methods 0.000 title claims description 10
- 238000012360 testing method Methods 0.000 claims abstract description 69
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims 4
- 238000002360 preparation method Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 36
- 238000002474 experimental method Methods 0.000 abstract description 4
- 206010039203 Road traffic accident Diseases 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000005413 snowmelt Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- 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)
- Immunology (AREA)
- Pathology (AREA)
- Road Paving Structures (AREA)
Abstract
The device and test method of deicing salt pavement friction attenuation rate under a kind of measurement low temperature environment, experimental rig is made of chamber and surface friction coefficient measurement device, by building pavement test platform, Control experiment the temperature inside the box, the measurement of deicing salt pavement friction attenuation rate under low temperature environment is realized.Test method utilizes above-mentioned experimental rig, prepares according to test, measurement and result arrange three steps and carry out.The test result that above-mentioned experimental rig and test method obtain is accurate, stablizes, is reliable, it more can really reflect the variation of road surface antiskid performance after using deicing salt, beneficial effect is significant, to preferred Road Snow Agent, improves road traffic safety, reduction traffic accident is of great significance.
Description
Technical field
The invention belongs to the snow melt clearing ice technology fields of urban road, airport roadway and highway etc., and in particular to one kind
It can fast and accurately measure under low temperature environment, the pavement friction attenuation rate that characterization deicing salt road pavement antiskid performance influences refers to
Target experimental rig and test method.
Background technique
The highways and streets of China's most area and airport roadway etc. can all be influenced in winter by ice and snow.Road
Accumulated snow icing do not only result in interruption of communication, be also easy to cause traffic accident, bring serious economy and life and property loss.Mesh
Before, it is exactly to dispense deicing salt that most snow melt deicing modes is used in worldwide, and according to incompletely statistics, the whole world is annual about
Using 30,000,000 tons of deicing salts, and the trend gradually increased is also presented in deicing salt dosage.
Spread deicing salt can reduce the antiskid performance on road surface, be guarantee driving safety, China's road deicing deicing salt country
Pavement friction attenuation rate index characterization and specification deicing salt road pavement antiskid performance are utilized in standard (GB/T 23851-2009)
It influences.Wherein, the method for measuring deicing salt pavement skid resistance attenuation rate is that measure spread deicing salt respectively molten using pendulum-type friction instrument
The antiskid value of live bituminous pavement, cement concrete pavement or indoor test specimen before and after liquid, and then calculate road surface after spread deicing salt
Frictional attenuation rate.Applicant analyzes above-mentioned test method and has the following deficiencies: (1) deicing salt on the basis of a large number of experiments
It is mainly used for winter road snow melt deicing, environment temperature is lower when use, and existing experimental rig does not consider control with method yet
Test temperature processed.Test data shows that environment temperature has a significant impact the pavement skid resistance condition after spread deicing salt.(2) exist
It using in the test operation of pendulum friction coefficient determinator, must be caught with hand due to accommodating the moment fallen, can allow whole device
Vibration is generated, accuracy of reading is affected by operator, be additionally, there may be pressure calibration difficulty, test result reproducibility difference etc. and is lacked
Point.
Summary of the invention
Above-mentioned test method there are aiming at the problem that, can measure the object of the present invention is to provide one kind and melt under low temperature environment
The experimental rig and test method for avenging agent pavement friction attenuation rate, can fast and accurately measure reality by the device and method
Under the conditions of the temperature of border after winter pavement of road spread deicing salt antiskid performance decay indices.
To achieve the above object, the present invention measures its spy of the experimental rig of deicing salt pavement friction attenuation rate under low temperature environment
Sign is, chamber and surface friction coefficient measurement device including that can control environment temperature.The chamber bottom can be consolidated
Pavement test platform, including bituminous pavement and two kinds of cement pavement testing stand are determined, with practical bituminous pavement or cement concrete pavement
Surface layer material therefor is identical, and the surface friction coefficient measurement device is placed on pavement test platform.
Chamber includes control system, motor, liquid storage device, compressor, condenser, evaporator, and bottom is equipped with universal wheel, institute
It states control system to be placed in inside chamber, and is equipped with display screen on the left of chamber.The motor uses servo motor, using spiral shell
Bolt is fixed on chamber bottom left.
Surface friction coefficient measurement device is made of pavement test platform, tensiometer, sliding block, the horizontal metroscope that tests the speed.The road surface
The size of testing stand is 180cm*30cm*5cm, including bituminous pavement and two kinds of cement pavement, respectively by asphalt and water
Two kinds of different kind of material of cement concrete are made, identical as real road surface layer material therefor, construction depth.The sliding block be with
Pouring weight, quality 1kg, side are fixed with rubber layer equipped with hook, slider bottom.The tensiometer passes through data line and control system
System is connected.
The test method of deicing salt pavement friction attenuation rate under a kind of measurement low temperature environment, it is characterised in that utilize above-mentioned examination
Experiment device follows the steps below:
(1) test prepares
1. bituminous pavement testing stand or cement pavement testing stand are moved in chamber, install and leveled；
2. sliding block is placed in middle position on the right side of pavement test platform, tensiometer is connected.
(2) it measures
1. blend rubber plate strikes off by 300ml water spread on pavement test platform, make one layer of water of its surface uniform fold
Film；
2. the speed of service is set as 4m/min, start to test and record frictional force f when sliding block reaches at the uniform velocity1, such as sliding
Block does not reach at the uniform velocity, need to adjust the speed of service and test again；
3. the water on pavement test platform surface is cleaned, and it is completely dried to it；
4. setting chamber temperature, preparing 300ml snow melt agent solution and pouring into beaker, 30min is placed in chamber；
5. striking off on pavement test platform, being allowed to uniform fold snow melt agent solution whole spread with rubber slab；
6. the speed of service is set as 4m/min, start to test and record frictional force f when sliding block reaches at the uniform velocity2, such as sliding
Block not up at the uniform velocity, need to adjust the speed of service and test again.
(3) result arranges
Before and after spread deicing salt, the coefficient of friction on road surface is calculated as follows in terms of μ:
In formula:
M- sliding block quality, value 1kg；G- acceleration of gravity, value 9.8m/s2。
μ-surface friction coefficient；
The frictional force of f- measurement
The pavement friction attenuation rate of deicing salt is calculated as follows in terms of M:
In formula:
The pavement friction attenuation rate of M- deicing salt；
f1Spray the frictional force of aquametry；
f2The frictional force of spraying snow-melting agent solution measurement.
Traditional pendulum type friction instrument is according to " elevation loss of pendulum, which is equal to, to be installed on swing arm end sheet rubber and slip over road surface
When, overcome pavement friction work done " principle be made, measurement result be pendulum value (BPN), divided by 100 can obtain friction system
Numerical value；And the present invention is made of the principle according to " frictional force is directly proportional to normal pressure and dynamic friction coefficient ", by measuring sliding block
The ratio of the frictional force and sliding block weight when opposite sliding, as surface friction coefficient occur between testing stand.Compared to pendulum-type
Coefficient of friction instrument, the present invention have the characteristics that easy to operate, measurement accuracy is high, fireballing:
(1) by chamber Control experiment temperature, the pavement friction attenuation rate under low temperature environment can be measured, and is actually melted
The use environment of snow agent is more consistent, and test result is more meaningful；
(2) sliding block is drawn using servo motor, accurately controls ram speed and precision, while there is moment starting and fast
The characteristics of speed stops, keeping measuring friction coefficient result more accurate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of deicing salt pavement friction attenuation rate experimental rig under measurement low temperature environment of the invention；
Fig. 2 is the main view of surface friction coefficient measurement device；Fig. 3 is the top view of surface friction coefficient measurement device；
Fig. 4 is the structural schematic diagram of sliding block.Wherein: 1 display screen；2 control systems；3 motors；4 liquid storage devices；5 universal wheels；6 test the speed length
Instrument；7 road surface models；8 compressors；9 leveling serews；10 condensers；11 tensiometers；12 rubber layers；13 drainage holes；14 clump weights；
15 data lines；16 insulating layers；17 evaporators.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, giving the structure of the device of deicing salt pavement friction attenuation rate under present invention measurement low temperature environment
Schematic diagram, including providing the chamber and surface friction coefficient measuring device of low-temperature test environment.The chamber includes control
System 2, motor 3, liquid storage device 4, compressor 8, condenser 10, evaporator 17 form, and are equipped with universal wheel 5, the control in bottom
System 2 processed is placed in inside chamber, and display screen 1, the liquid storage device 4, compressor 8, condenser 10 are equipped on the left of chamber
It is placed on the bottom plate of chamber bottom of cabinet bulk, the evaporator 17 is placed in chamber operating room back, and the motor 3 is placed in test
On the left of case chamber bottom, insulating layer 16 is provided between operating room, the length measurement sensor 6 that tests the speed is placed in chamber operating room
Bottom, the chamber chamber bottom are equipped with leveling serew 9, and bottom right is equipped with drainage hole 13.
As shown in Figure 2 and Figure 3, the main view and top view of surface friction coefficient measuring device, including road surface is set forth
Model 7, tensiometer 11, data line 15, clump weight 14 and rubber layer 12 form.The road surface model 7 is having a size of 180cm*30*
5cm builds two kinds using asphalt making and cement concrete, is placed in 6 leveling spiral shells of chamber chamber bottom
On silk 9, the tensiometer 11 is connect by data line 15 with control system 2.
As shown in figure 4, giving the structural schematic diagram of sliding block, the sliding block is clump weight 14, quality 1kg, in sliding block
Bottom is provided with rubber layer 12, with the effect of simulated automotive tire.
During the test, motor 3 starts rapidly after receiving signal, draws sliding block 14 at the uniform velocity to transport to 3 direction of motor
Dynamic, when the horizontal metroscope 6 that tests the speed that 3 right side of motor is arranged in detects that sliding block 14 is less than 25cm at a distance from motor 3, motor 3 stops
It only works, sliding block 14 stops sliding.
The embodiment of test method:
To verify the reliable of the experimental rig of deicing salt pavement friction attenuation rate and test method under low temperature environment of the present invention
Property and beneficial effect, below with reference to embodiment, the present invention is described in more detail, but the present invention is not limited to following embodiments.
Specific test procedure is as follows:
(1) test prepares
1. bituminous pavement testing stand or cement pavement testing stand are moved in chamber, install and leveled；
2. sliding block is placed in middle position on the right side of pavement test platform, tensiometer is connected.
(2) it measures
1. blend rubber plate strikes off by 300ml water spread on pavement test platform, make one layer of water of its surface uniform fold
Film；
2. the speed of service is set as 4m/min, start to test and record frictional force f when sliding block reaches at the uniform velocity1, such as sliding
Block does not reach at the uniform velocity, need to adjust the speed of service and test again；
3. the water on pavement test platform surface is cleaned, and it is completely dried to it；
4. setting chamber temperature, preparing 300ml snow melt agent solution and pouring into beaker, 30min is placed in chamber；
5. striking off on pavement test platform, being allowed to uniform fold snow melt agent solution whole spread with rubber slab；
6. the speed of service is set as 4m/min, start to test and record frictional force f when sliding block reaches at the uniform velocity2, such as sliding
Block not up at the uniform velocity, need to adjust the speed of service and test again.
(3) result arranges
20% sodium chloride is respectively adopted, 3 kinds of different deicing salts of 20% potassium acetate and certain liquid deicing salt are tested,
And pavement friction attenuation rate is calculated according to following formula:
In formula:
The pavement friction attenuation rate of M- deicing salt；
f1Spray the frictional force of aquametry；
f2The frictional force of spraying snow-melting agent solution measurement.
The pavement friction attenuation rate test result of all kinds of deicing salts is shown in Table 1.
The pavement friction attenuation rate test result table of 1 deicing salt of table
Test result shows: at a temperature of varying environment, the pavement friction attenuation rate of same deicing salt is different, environment temperature
Have on the coefficient of friction on road surface after spread deicing salt and significantly affects；The pavement friction attenuation rate of variety classes deicing salt is different.
The pavement friction attenuation rate of experimental rig and test method measurement deicing salt through the invention, is able to reflect deicing salt road pavement
The influence of antiskid performance, test result is accurate, stablizes, is reliable, and discrimination is high.Experimental rig and test method of the invention can
It is preferred that going out road pavement antiskid performance influences lesser deicing salt, while improving snow melt deicing efficiency, guarantee road traffic safety.
It should be noted that above embodiments are merely to understand the present invention, the present invention is not limited to this embodiment, all at this
Addition, equivalent replacement or the modification of the technical characteristic made on the basis of the technical solution of invention, are regarded as protection of the invention
Range.
Claims (1)
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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 | A test method for determining the friction attenuation rate of snow-melting agent pavement in low temperature environment |
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| CN201610331616.6A CN105823725B (en) | 2016-05-11 | 2016-05-11 | A test method for determining the friction attenuation rate of snow-melting agent pavement in low temperature environment |
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| CN105823725B true CN105823725B (en) | 2019-02-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 | A device for measuring the dynamic-static friction coefficient of road surfaces under indoor and outdoor multi-environment conditions |
| CN107525739B (en) * | 2017-08-22 | 2023-08-29 | 山东交通学院 | A test device and test method for measuring the minimum use temperature of liquid deicing 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 |
| CN108169121B (en) * | 2018-03-07 | 2023-08-25 | 山东交通学院 | A fully automatic pavement friction coefficient test system |
| CN110044813B (en) * | 2019-04-11 | 2020-08-11 | 东南大学 | A detection method for the friction coefficient of asphalt pavement in the frozen area in a wide temperature range |
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| WO2010031905A1 (en) * | 2008-09-19 | 2010-03-25 | Helsinki University Of Technology | Friction estimation method |
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Patent Citations (3)
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|---|---|---|---|---|
| EP1418106A1 (en) * | 2001-07-19 | 2004-05-12 | Bridgestone Corporation | Road surface friction coefficient estimating method, signal multiplex transmission method and signal multiplex transmission device |
| CN101250392A (en) * | 2008-03-28 | 2008-08-27 | 北京工业大学 | Preparation method of antifreeze type deicing agent |
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