CN107917873A - A kind of test method of asphalt oil resistant corrosion energy - Google Patents
A kind of test method of asphalt oil resistant corrosion energy Download PDFInfo
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- CN107917873A CN107917873A CN201711312407.8A CN201711312407A CN107917873A CN 107917873 A CN107917873 A CN 107917873A CN 201711312407 A CN201711312407 A CN 201711312407A CN 107917873 A CN107917873 A CN 107917873A
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- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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Abstract
The present invention relates to a kind of test method of asphalt oil resistant corrosion energy, including following steps：The formal hydrazine standard solution of the first step, the zero turbidity solution of No. 0 diesel oil for preparing school small incidental expenses and school full scale, pours into a sample bottle to body 6cm eminences and is denoted as bottle 1 and bottle 2 respectively respectively；Second step, the quality for weighing asphalt standard marshal piece are simultaneously put into container；3rd step, No. 0 diesel oil of measurement 1000mL add in said vesse and are dipped to setting time；3rd step, take out marshal piece, was soaked with glass bar uniform stirring and extracts 1ml with rubber head dropper after the diesel oil 1~2 minute of test specimen and instill a sample bottle and add No. 0 diesel fuel dilution to the position at bottom of bottle 4cm, and is denoted as bottle 3.Turbidity, that is, asphalt unit mass turbidity value that the present invention passes through the diesel oil after measuring immersion test specimen, more intuitively reflect asphalt from asphalt mixture and the damaed cordition gathered materials of part, so as to judge the decline degree of asphalt caking property to evaluate the oil resistant corrosion energy of asphalt.
Description
Technical field
The present invention relates to a kind of test method of asphalt oil resistant corrosion energy, belongs to highway asphalt mixture experiment skill
Art field.
Background technology
Bituminous paving is due to good mechanical property, sufficient bearing capacity, excellent driving comfort level, less row
The advantages that car noise and shorter curing time and as China Higher level highway mainstream road surface structure type.Pitch mixes
Material pavement performance generally comprises high-temperature stability, low-temperature cracking-resistance, water stability, durability, skid resistance etc..And in recent years due to
The diversity of traffic and the diversity of vehicle condition, the diversity of road conditions also accordingly increase.Such as in gas station entrance section, again
For carrier vehicle compared with Multiple Sections and airport section, vehicle is easier to that there is a phenomenon where diesel oil water clock herein when starting and braking.Because pitch with
Diesel oil all derives from crude oil, so when diesel oil immerses road surface, the i.e. oil erosion phenomenon, and with the time of the phenomenon that can mix with pitch
Increase all the more seriously, the asphalt membrane for ultimately resulting in asphalt surface is completely fallen off, and mixes the decline of pitch caking property, pitch
Close material mechanical property to lose, so as to cause the diseases such as road surface softening, loose, pit-hole.For the above situation, it is necessary to specifically
Its oil resistant corrosion can be evaluated exactly in area's asphalt mixture material design process.
In view of the research both at home and abroad on bituminous paving oil erosion phenomenon and asphalt oil resistant corrosion energy is relatively fewer, extremely
The present not yet forms a set of ripe asphalt oil resistant erosion performance evaluation and test method.Domestic and foreign scholars are mainly logical at present
Cross the drip front and rear to producing oil erosion infringement of Marshall stability test, cleavage strength experiment, wheel tracking test and indirect tensile test on frozen-thaw
Blue or green mixture carries out contrast test, its oil resistant corrosion energy is evaluated with this.Although above method can simulate drip within the specific limits
The oil erosion on blue or green road surface destroys, but also has shortcoming.Such as when carrying out the Marshall stability test of immersion oil test specimen, due to needing
It is immersed in constant temperature water tank, water oil is immiscible, be easy to cause loss, the floating of diesel oil in test specimen, influences immersion oil effect；Immersion oil
Indirect tensile test on frozen-thaw process is cumbersome, without general applicability.Immersion oil wheel tracking test needs longer guarantor due to track plate test specimen
The warm time, while there are security risk etc. in high temperature environments at place.Therefore, the applicability of above-mentioned test method remains to be discussed, examination
It is also poor with actual conditions correlation to test result.More important point, above-mentioned test method be not around diesel oil corrode be logical
Cross the caking property for influencing asphalt and aggregate and cause Asphalt Mixture Performance to decline this main function mechanism and surveyed
Examination.The key of caking property evaluation is the loss amount for testing asphalt from asphalt mixture.Therefore, being badly in need of one kind can accurately survey
The fixed loss amount that asphalt from asphalt mixture after oil loses occurs, and easy to operate, time saving and energy saving test method.
Turbidimetric basic principle is the light beam sent by light source after measuring device is put into sample, is running into suspended particulate
When form scattering light, the turbid ity signals of resulting 90 ° of scatterings light are received by light-sensitive element, and optical signal amplifies and single through circuit
Tested turbidity value is shown after the processing of piece microcomputer data.Nephelometer is widely used in waterworks, sanitary sewage disposal at present
Chang Deng departments, are generally used to measurement water quality.
The content of the invention
The shortcomings that technical problems to be solved by the invention are, overcome the prior art, there is provided a kind of test index, Yi Jiyi
It is kind accurate, the test period is short and easy to operate, test test specimen repeats utilization and it is highly reliable, can more preferable simulated roadway reality
The test method of the asphalt oil resistant corrosion energy of border situation.
In order to solve the above technical problems, the present invention provides a kind of test method of asphalt oil resistant corrosion energy, its
It is characterized in that including following steps：
The formal hydrazine standard solution of the first step, the zero turbidity solution of No. 0 diesel oil for preparing school small incidental expenses and school full scale, falls respectively
Enter in a sample bottle to body 6cm eminences and be denoted as bottle 1 and bottle 2 respectively；
Second step, the quality for weighing asphalt standard marshal piece are simultaneously put into container；
3rd step, No. 0 diesel oil of measurement 1000mL add in said vesse and are dipped to setting time；
4th step, take out marshal piece, and the diesel oil that test specimen was soaked with glass bar uniform stirring uses glue after 1~2 minute
Head dropper extracts 1ml and instills a sample bottle and add No. 0 diesel fuel dilution to the position at bottom of bottle 4cm, and is denoted as bottle 3；
5th step, be put into measuring cell after bottle 3 is shaken up, and covers shading cover and is measured with nephelometer and read after 20 seconds
Number；
6th step, test specimen unit mass turbidity value calculate as follows：
In formula：The unit mass turbidity value (NTU/kg) of USNTU --- asphalt；
N0--- the turbidity value (NTU) of detected solution；
m0--- quality (kg) before the immersion oil of bitumen mixture specimen；
The technical solution that further limits of the present invention is：The zero turbidity solution is using at least 2L No. 0 diesel oil and heats
Its temperature is set to reach in ± 0.5 DEG C of error range of 0~50 DEG C of test temperature.
Further, turbidimetric zero degree aligning step is further included；The zero degree aligning step includes：
1) bottle 1 is inserted in measuring cell, the white position line on the graduation mark alignment measuring cell of sample bottle, then covers screening
Light lid；
2) press correcting key, instrument shows 0.00 and flickers, confirm be in measuring cell after zero turbidity solution by acknowledgement key,
Instrument enters school zeroth order section, and zero turbidity solution is corrected and finished after counting 15 seconds.
Further, turbidimetric full scale aligning step is further included, the full scale aligning step includes：
1) correcting key is double-clicked, i.e., is corrected into full scale, bottle 2 is inserted in measuring cell, the graduation mark reply of sample bottle
White position line on locating tab assembly pond, then covers shading cover, full scale value flicker；
2) acknowledgement key is pressed, instrument enters full scale calibration phase, and the 15 seconds post-equalizations that count finish, and instrument is automatically into measurement
Stage.
Further, in the 5th step, negative value is shown when detected solution turbidity value is less than zero degree water；When display negative value
When, it is 0 to assert detected solution turbidity；Assert when detected solution turbidity value exceeds the measurement range of instrument detected solution turbidity >=
400NTU。
The beneficial effects of the invention are as follows：The present invention is to simulate the least favorable situation of true road surface immersion oil, is soaked by measuring
The turbidity of diesel oil after test specimen, more intuitively reflects asphalt from asphalt mixture and the damaed cordition that part gathers materials, so that
The decline degree of asphalt caking property is judged to evaluate the oil resistant corrosion energy of asphalt.This test method is by enclosing
The caking property of asphalt and aggregate is influenced after diesel oil erosion asphalt and causes Asphalt Mixture Performance to decline this
Main function mechanism and carry out, be to characterize asphalt oil resistant corrosion energy by testing pitch loss amount.Compared to it
For his asphalt oil resistant erosion performance test, first, the testing time is short, normally only need 5 to 10 minutes.Second, accuracy is high,
This is owned by France in quantitative measurement, and equipment is accurate, and measured data error is small, no more than 5%, is passed compared to asphalt
It is very accurate for more than 10~20% error of experiment of machanics of uniting.Third, instrument cost is low, compared to large-scale mechanics
Small for equipment, source is wide, and easily operated, and universality is stronger.
Brief description of the drawings
Fig. 1 is the structure diagram that marshal piece is placed in container.
Fig. 2 is the top view of Fig. 1.
Embodiment
Embodiment 1
A kind of test method of asphalt oil resistant corrosion energy provided in this embodiment, as shown in Figs. 1-2：
The instrument that the present embodiment uses includes：1. nephelometer：Measurement range is in 0~400NTU, minimum indicating value
0.01NTU, error are no more than ± 6%.2. rubber head dropper：1ml.3. measuring cup：Capacity 1000ml.4. balance：Amount sense is not more than
0.1g.5. sample bottle：Cylinder glass container.6. immersion oil container：Using truncated rectangular pyramids plastic containers, bottom surface
The length of side 11.8cm, high 10.2cm, top surface length of side 13.2cm.Other：Glass bar, rubber gloves, recording sheet, label paper.
Turbidimetric zero degree aligning step is carried out first；The aligning step of leading in reading aloud includes：
1) bottle 1 is inserted in measuring cell, the white position line on the graduation mark alignment measuring cell of sample bottle, then covers screening
Light lid；
2) press correcting key, instrument shows 0.00 and flickers, confirm be in measuring cell after zero turbidity solution by acknowledgement key,
Instrument enters school zeroth order section, and zero Turbidity Water is corrected and finished after counting 15 seconds.Full scale correction is carried out to nephelometer again.
3) correcting key is double-clicked, i.e., is corrected into full scale, bottle 2 is inserted in measuring cell, the graduation mark reply of sample bottle
White position line on locating tab assembly pond, then covers shading cover, full scale value flicker；
4) acknowledgement key is pressed, instrument enters full scale calibration phase, and the 15 seconds post-equalizations that count finish, and instrument is automatically into measurement
Stage.
Negative value is shown when detected solution turbidity value is less than zero degree water；When showing negative value, assert that detected solution turbidity is
0；Assert detected solution turbidity >=400NTU when detected solution turbidity value exceeds the measurement range of instrument.
Specific experiment step is as follows：
The first step：Preparation standard marshal piece：1 high 63.5 ± 1.3mm, diameter are molded by Marshall compaction method
The standard marshal piece of 101.6mm, the mix type are SMA-13, bitumen aggregate ratio 6.1%.Weigh marshal piece matter
Amount, is put into 1 tetragonous turret vessel, the bottom surface length of side 11.8cm of the container, high 10.2cm, top surface length of side 13.2cm.
Second step：No. 0 diesel oil of 1000ml is once measured using measuring cup, adds in tetragonous turret vessel, diesel oil is covered examination
Part top surface.
3rd step：Reach the soaking time of setting after 1 day, take out test specimen after immersion oil, soaked with glass bar uniform stirring
The diesel oil of test specimen 2 minutes, using 3 each extraction 1ml diesel oil from tetragonous turret vessel of rubber head dropper point, instills corresponding 3 examinations
Add in sample bottle and respectively No. 0 diesel fuel dilution that test specimen then is put back to tetragonous turret vessel relaying to apart from bottom of bottle 4cm graduation mark positions
It is continuous to be dipped to next setting time.
4th step：By one section of insertion nephelometer socket of power cord, the directly logical upper external power of the other end.
5th step：By switching key, NTU turbidity units are selected.
6th step：It is sequentially placed into after 3 sample bottles are shaken up respectively in measuring cell, covers shading cover and measure.30 seconds
After show numerical stability, record turbidity value.
7th step：The operation of the step of the 3rd step~the 6th is repeated, is further continued for being tested after immersion oil is 4 days and 7 days full respectively, according to
The turbidity average value that test specimen quality and 3 parallel testings obtain carries out test specimen unit mass turbidity value and calculates：
In formula：The unit mass turbidity value (NTU/kg) of USNTU --- asphalt；
N0--- the turbidity value (NTU) of detected solution；
m0--- quality (kg) before the immersion oil of bitumen mixture specimen；
3 parallel tests should be at least carried out under identical conditions, finally show that 3 kinds of different oily erosions divide under horizontal i.e. in diesel oil
Asphalt unit mass turbidity value that Jin Pao be 1 day, 4 days and 7 days, result of the test are as shown in table 1.In addition, also same
Marshall stability test and 20 DEG C of cleavage strength experiments have been carried out under oily erosion level to the asphalt to contrast, have been tested
As a result as shown in table 2 and table 3.
Turbidity test results after the oil erosion of 1 SMA-13 asphalts of table
| Soaking time | 1 day | 4 days | 7 days |
| 1 turbidity value of parallel test (NTU) | 46.6 | 51.0 | 77.7 |
| 2 turbidity value of parallel test (NTU) | 45.4 | 49.1 | 76.4 |
| 3 turbidity value of parallel test (NTU) | 47.3 | 52.0 | 79.1 |
| Turbidity average value (NTU) | 46.4 | 50.7 | 77.7 |
| The coefficient of variation | 1.69% | 2.37% | 1.42% |
| Quality (kg) | 1.213 | 1.176 | 1.201 |
| Unit mass turbidity value (NTU/kg) | 38.3 | 43.1 | 64.7 |
Marshall stability test result after the oil erosion of 2 SMA-13 asphalts of table
Cleavage strength result of the test after the oil erosion of 3 SMA-13 asphalts of table
| Soaking time | 1 day | 4 days | 7 days |
| Parallel 1 cleavage strength of test specimen (MPa) | 0.51 | 0.38 | 0.28 |
| Parallel 1 cleavage strength of test specimen (MPa) | 0.61 | 0.30 | 0.31 |
| Parallel 1 cleavage strength of test specimen (MPa) | 0.75 | 0.53 | 0.19 |
| Cleavage strength average value (MPa) | 0.62 | 0.40 | 0.26 |
| The coefficient of variation | 15.79% | 23.64% | 19.61% |
The result of contrast different tests can be seen that the test method of asphalt oil resistant corrosion energy of the present invention
Belong to non-destructive testing, the asphalt standard marshal piece of use may be reused.Only need to be molded 1 test specimen,
After being soaked 1 day, 4 days and 7 days in diesel oil respectively, the diesel oil after immersion is tested, and every time test needed for
Diesel oil amount is seldom, does not interfere with the effect that bitumen mixture specimen continues immersion, is completed rear test specimen and can be additionally used in other power
Learn experiment.And Marshall stability test and diametral compression test belong to destructive testing, the not reproducible utilization of test specimen.With every group 3
Exemplified by parallel test, 9 test specimens are needed altogether under 3 kinds of different oily erosion levels.Moreover, it relates to asphalt oil resistant corrosion
The test method test accuracy of energy is higher, and the coefficient of variation between parallel test is less than 3%, has preferable repeatability and reproduction
Property.And Marshall stability test and diametral compression test are due to different pitches compound test specimen otherness in itself and experiment after oil erosion
Measuring accuracy limits, its coefficient of variation is all higher than 10%, and partial test is even greater than 20%.Therefore, with conventional test methodologies phase
Than, the test method operation of asphalt oil resistant corrosion energy of the present invention is more simple and convenient, and test accuracy is higher,
Test error greatly reduces.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical solution, all fall within the protection domains of application claims.
Claims (5)
1. a kind of test method of asphalt oil resistant corrosion energy, it is characterised in that including following steps：
The formal hydrazine standard solution of the first step, the zero turbidity solution of No. 0 diesel oil for preparing school small incidental expenses and school full scale, pours into one respectively
Bottle 1 and bottle 2 are denoted as to body 6cm eminences and respectively in sample bottle；
Second step, the quality for weighing asphalt standard marshal piece are simultaneously put into container；
3rd step, No. 0 diesel oil of measurement 1000mL add in said vesse and are dipped to setting time；
4th step, take out marshal piece, was dripped after the diesel oil 1~2 minute of test specimen was soaked with glass bar uniform stirring with rubber head
Pipe extracts 1ml and instills a sample bottle and add No. 0 diesel fuel dilution to the position at bottom of bottle 4cm, and is denoted as bottle 3；
5th step, be put into measuring cell after bottle 3 is shaken up, and covers shading cover and is measured with nephelometer and the reading after 20 seconds；
6th step, test specimen unit mass turbidity value calculate as follows：
<mrow>
<mi>U</mi>
<mi>S</mi>
<mi>N</mi>
<mi>T</mi>
<mi>U</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>N</mi>
<mn>0</mn>
</msub>
<msub>
<mi>m</mi>
<mn>0</mn>
</msub>
</mfrac>
</mrow>
In formula：The unit mass turbidity value (NTU/kg) of USNTU --- asphalt；
N0--- the turbidity value (NTU) of detected solution；
m0--- quality (kg) before the immersion oil of bitumen mixture specimen；
2. the test method of asphalt oil resistant corrosion energy according to claim 1, it is characterised in that：Zero turbidity
Solution is using at least 2L No. 0 diesel oil and heats in ± 0.5 DEG C of error range for making its temperature reach 0~50 DEG C.
3. the test method of asphalt oil resistant corrosion energy according to claim 2, it is characterised in that further include turbidity
The zero degree aligning step of meter；The zero degree aligning step includes：
1) bottle 1 is inserted in measuring cell, the white position line on the graduation mark alignment measuring cell of sample bottle, then covers shading
Lid；
2) correcting key is pressed, instrument shows 0.00 and flickers, and confirms it is by acknowledgement key, instrument after zero turbidity solution in measuring cell
Into school zeroth order section, zero turbidity solution is corrected and finished after counting 15 seconds.
4. the test method of asphalt oil resistant corrosion energy according to claim 3, it is characterised in that further include turbidity
The full scale aligning step of meter, the full scale aligning step include：
1) correcting key is double-clicked, i.e., corrects, bottle 2 is inserted in measuring cell, the graduation mark of sample bottle should be directed at survey into full scale
The white position line on pond is measured, then covers shading cover, full scale value flicker；
2) acknowledgement key is pressed, instrument enters full scale calibration phase, and the 15 seconds post-equalizations that count finish, and instrument is automatically into measurement rank
Section.
5. the test method of asphalt oil resistant corrosion energy according to claim 1, it is characterised in that：In the 5th step
In, show negative value when detected solution turbidity value is less than zero degree solution；When showing negative value, it is 0 to assert detected solution turbidity；When
Detected solution turbidity value assert detected solution turbidity >=400NTU when exceeding the measurement range of instrument.
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| CN201711312407.8A CN107917873B (en) | 2017-12-05 | 2017-12-05 | Method for testing oil corrosion resistance of asphalt mixture |
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| CN107917873B CN107917873B (en) | 2020-05-19 |
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| CN108414431A (en) * | 2018-03-21 | 2018-08-17 | 中国公路工程咨询集团有限公司 | A kind of detection method of the oil resistant corrosion energy of asphalt product |
| CN108918403A (en) * | 2018-08-06 | 2018-11-30 | 南京林业大学 | A kind of research method of bituminous pavement biodeterioration mechanism |
| CN108956421A (en) * | 2018-07-16 | 2018-12-07 | 三峡大学 | A kind of oil absorbing effect evaluation method of oil absorption material on bituminous pavement |
| CN111028961A (en) * | 2019-12-12 | 2020-04-17 | 华北电力大学 | Simulation system and method for fragment flow in fuel assembly after pressurized water reactor accident |
| CN113029941A (en) * | 2021-03-03 | 2021-06-25 | 同济大学 | Test method for evaluating oil stain resistance of asphalt |
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| CN108414431B (en) * | 2018-03-21 | 2020-10-30 | 中国公路工程咨询集团有限公司 | Method for detecting oil corrosion resistance of asphalt products |
| CN108956421A (en) * | 2018-07-16 | 2018-12-07 | 三峡大学 | A kind of oil absorbing effect evaluation method of oil absorption material on bituminous pavement |
| CN108918403A (en) * | 2018-08-06 | 2018-11-30 | 南京林业大学 | A kind of research method of bituminous pavement biodeterioration mechanism |
| CN111028961A (en) * | 2019-12-12 | 2020-04-17 | 华北电力大学 | Simulation system and method for fragment flow in fuel assembly after pressurized water reactor accident |
| CN113029941A (en) * | 2021-03-03 | 2021-06-25 | 同济大学 | Test method for evaluating oil stain resistance of asphalt |
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