CN108362715A - A kind of measurement method of the mineral aggregate transfer parameter of asphalt compacting process - Google Patents
A kind of measurement method of the mineral aggregate transfer parameter of asphalt compacting process Download PDFInfo
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- CN108362715A CN108362715A CN201810080173.7A CN201810080173A CN108362715A CN 108362715 A CN108362715 A CN 108362715A CN 201810080173 A CN201810080173 A CN 201810080173A CN 108362715 A CN108362715 A CN 108362715A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a kind of mineral aggregates of asphalt compacting process to migrate evaluation method.This method places marking particle in mixture first, then distribution gyratory compaction test is carried out under the conditions of different tests to the asphalt under different gradation, the migration of gyratory compaction process markup particle is observed by X ray CT technologies, image is handled using Image pro premier and MATLAB softwares.And based on this proposition particle space migration index Lx、Ly、Lz、Lxoy、ZφWith rolling index α, αΔx、αΔy、αΔzFrom the thin mineral aggregate migratory behaviour seen angle and evaluate asphalt compacting process.It is more accurate compared to other evaluation method evaluation results.
Description
Technical field
The present invention relates to field of road, specially a kind of survey of the mineral aggregate transfer parameter of asphalt compacting process
Amount method.
Background technology
In engineering practice, pass through the parameters such as shearing strength, cleavage strength, the stiffness modulus of test bitumen mixture specimen
Come evaluate its macroscopic view mechanical characteristic, to instruct bituminous mixture, at the same time, according to engineering experience with compactness with
Flatness is index, is compacted to bituminous paving.But on the basis of this, the early disease and durability of bituminous paving are not
The problems such as sufficient, still remains.Numerous scholars have been devoted to the research of asphalt compacting process Mineral Material migration characteristic.
Kutay analyzes motor behavior of the aggregate under compaction；Li Peilong uses the experimental rig of independent development, analysis pitch mixed
The mineral aggregate for closing material slides shear deformation characteristic；P é rez-Jim é nez analyze compacting temperature and debulking methods to asphalt
The influence of performance and volume index.
In recent years, it is increasingly taken seriously from thin microcosmic angle Research on Asphalt Mixture in road engineering research field, it is all
More researchers are using image processing techniques or discrete element numerical simulation software to asphalt microscopical structure and intensity shape
It is studied at mechanism.Ehsan Ghafoori Roozbahany are using X-ray CT technologies to asphalt compacting process
In particle flow rule studied.Hu Chichun is by CT scan technology to the sky of the gyratory compaction test specimen of asphalt
Gap distribution calculates, and further evaluates the uniformity of its dynamic compaction.Fu Xiangru is using image processing techniques to different pressures
The main shaft of the internal particle of the real molding test specimen of method is defined, and for statistical analysis, obtains asphalt particle
Distribution situation.
During these experiments, cutting recombinant is carried out to test specimen and has been further applied load again, it so may be to of test specimen
Grain movement generates certain influence, and its study limitation is in two-dimensional space, and actual particle movement necessarily three-dimensional space
Movement, there are certain errors for experiment.Mineral aggregate migration characteristic of asphalt compacting process is studied based on this, is proposed
New evaluation parameter and measurement method.
Invention content
For problems of the prior art, the mineral aggregate migration that the present invention provides a kind of asphalt compacting process is commented
Valence method.From the thin mineral aggregate migratory behaviour seen in angle discussion compacting process, to pass through and being mixed to the pitch for placing marking particle
Material carry out multi-step rotation compaction test, using X-ray CT technologies observe gyratory compaction during marking particle migratory behaviour into
Row, and image is handled using Image-pro premier and MATLAB softwares, the evaluation index of mineral aggregate migration is proposed successively.
The present invention is to be achieved through the following technical solutions：
A kind of measurement method of the mineral aggregate transfer parameter of asphalt compacting process, includes the following steps：
(1) gathering materials for multigroup different-grain diameter is chosen, and the aggregate particle grain size in every group is identical, to each collection in every group
Material particle is marked；
(2) aggregate particle of label is put into asphalt and carries out distribution gyratory compaction examination by mixing asphalt
It tests；
(3) asphalt after compacting is scanned；
(4) it obtains image to scanning to handle, the aggregate particle coordinate marked is obtained according to aggregate particle coordinate
The transfer parameter of aggregate particle, transfer parameter include spatial migration parameter and rolling parameters；
Rolling parameters include：The spatial rotational angle [alpha] of aggregate particle, the angle α of aggregate particle and X-axisΔx, aggregate particle
With the angle α of Y-axisΔy, the angle α of aggregate particle and Z axisΔz；
Spatial migration parameter includes：Displacement L of the aggregate particle in X axisx, displacement L of the aggregate particle in Y-axisy,
The displacement L of aggregate particle in the horizontal planexoy, aggregate particle migration value L straight downz, aggregate particle displacement straight down is dynamic
Relative value Zφ；
ZφIt is calculated by formula 1；
Wherein, Δ h is height of specimen changing value after bitumen mixture specimen compacting.
Further, further comprising the steps of：(5) transfer parameter of the aggregate particle obtained according to step 4, analysis are gathered materials
Grain Influencing Factors of Migration, determines the evaluation criterion of aggregate particle migration.
Further, the aggregate particle is marked, and inlays iron wire respectively to aggregate particle and wraps reduced iron powder.
Further, the method that the aggregate particle inlays iron wire is to drill through corresponding iron on aggregate particle surface using electric drill
Thermosetting epoxy resin is injected in the hole of filament length degree into hole, is then inlaid into iron wire in hole securely；
The method that the aggregate particle wraps reduced iron powder is, then will be also in aggregate particle surface smear epoxy resin
Former iron powder is uniformly applied to aggregate particle surface.
Further, the specific method is as follows for the multi-step rotation compaction test：
Mixing asphalt is divided into more parts, more parts of asphalts are sequentially placed into test piece mould, and adjacent
Two parts of asphalts between place an aggregate particle during obtain every group of step 1 gathers materials, same group in every layer is gathered materials
Particle is located at same axis；
Test piece mould equipped with asphalt is put into baking oven and keeps the temperature 60min-90min under compacting temperature, then
Asphalt is compacted stage by stage on rotary compactor.
Further, the specific side of the CT scan is as follows：The asphalt is repeatedly pressed in each packing stage
It after reality, waits for that it is cooled to room temperature, is scanned by X-ray CT, obtain the image of multiple tomographies.
Further, the influence factor of the transfer parameter of the aggregate particle is mix type, nominal maximum aggregate size, pitch
Dosage and compacting temperature.
Compared with prior art, the present invention has technique effect beneficial below：
The measurement method of the mineral aggregate transfer parameter of asphalt compacting process provided by the invention, by analyzing mixture
Type, nominal maximum aggregate size, asphalt content and compacting temperature influence the migration of aggregate particle, determine and evaluate the particle migration that gathers materials
Evaluation criterion, by compare transfer parameter size obtain different location mineral aggregate particle in compacting process migration characteristic it is poor
It is different.This method is based on distribution gyratory compaction test and digital image acquisition technology, by measuring aggregate particle pointer and main shaft
Parameter, determines the moving parameter and rolling parameters of aggregate particle indirectly, and then passes through particle space moving parameter and rolling parameters
From the thin mineral aggregate migratory behaviour seen angle and evaluate asphalt compacting process, other methods are compared, evaluation result is more accurate
Reliably.
Description of the drawings
Fig. 1 is the distribution schematic diagram of the aggregate particle of label.
Fig. 2 is the dependency diagram of the pointer and main shaft index of 1#, 2# marking particle；
Fig. 3 is the displacement indicatrix of 1#, 2# particle；
Fig. 4 is the displacement indicatrix of 3#, 4# particle；
Fig. 5 is the rolling and migration of N0-N8 compacting process coarse aggregates；
Fig. 6 is the rolling and migration of N8-N100 compacting process coarse aggregates；
Specific implementation mode
Present invention will be described in further detail below with reference to the accompanying drawings, described to be explanation of the invention rather than limit
It is fixed.
A kind of mineral aggregate migration evaluation method of asphalt compacting process, includes the following steps：
Step 1：Choose raw material and mineral aggregate gradation
This example uses shell 90# matrix pitches, reference《Highway engineering pitch and Asphalt Mixture Experiment regulation
(JTJ052-2000)》Related request is tested, and test index is as shown in table 1.Tri- kinds of mixing AC-13, AC-20, OGFC-13
Asphalt carries out mineral aggregate transfer parameter test respectively, and mineral aggregate gradation used is as shown in table 2, and optimum oil-stone ratio uses Marshall
Design method determines that compacting temperature is 140 DEG C, passes through rotary compactor shaping test piece.
1 matrix pitch technical requirement of table and test result
2 mixture gradation of table
Step 2：Carry out distribution gyratory compaction test and CT scan
The aggregate particle of two 19.0mm is chosen, 1# particles and 2# particles are labeled as, then chooses gathering materials for two 13.2mm
Particle is labeled as 3# particles and 4# particles, and inlays iron wire respectively on aggregate particle and wrap reduced iron powder processing, so as to
In progress CT scan and image processing and analyzing.
The method that aggregate particle inlays iron wire is to drill through the hole of corresponding iron wire length on aggregate particle surface using electric drill,
Xiang Kongzhong injects thermosetting epoxy resin, is then inlaid into iron wire in hole securely；
The method that aggregate particle wraps reduced iron powder is, in aggregate particle surface smear epoxy resin, then by reduced iron
Powder is uniformly applied to aggregate particle surface.
As shown in Figure 1, mixing asphalt and being uniformly divided into three parts, layering is fitted into SGC test piece moulds.In test specimen mould
An oilpaper is placed in the bottom of tool, first part of asphalt is then packed into test piece mould, by 2# marking particles
On the surface for the asphalt that (19.0mm) and 4# marking particles (13.2mm) are symmetrically disposed at first part along round diameter,
Then second part of asphalt is fitted into test piece mould, is slightly flattened, 1# and 3# labels are placed according to above step
Grain, it is ensured that 1# marking particles (19.0mm) are in right over 2# particles, and 3# marking particles are in the surface of 4# marking particles.Most
Afterwards, the asphalt of third part is packed into test piece mould, test piece mould is put into baking oven after slightly flattening is compacted accordingly
At a temperature of keep the temperature 60min-90min, after the temperature of asphalt reaches compacting requirement temperature and stablizes, in test piece mould table
Oilpaper is placed on progress first stage compacting on rotary compactor on cover, is taken out after being compacted 8 times, is denoted as N0-N8, waits for test piece mould
It is demoulded after being cooled to room temperature, CT scan calibration is carried out to bitumen mixture specimen after demoulding, and then carry out CT scan.
After scanned, bitumen mixture specimen is fitted into test piece mould and is put into baking oven and is heated, pitch is mixed
It closes and progress second stage compacting on rotary compactor is taken out and be placed on after material is heated to compacting temperature, taken out after being compacted 92 times, remembered
It for N8-N100, is demoulded after cooling, and CT scan is proceeded by according to the scan start point that the same test specimen last time is demarcated.
Step 3：It handles image and calculates the migration index of four kinds of marking particles
Iron wire is inlaid in 1# and 2# particles, iron wire plays marked effect, is called " pointer " in this method.It is any to gather materials
Particle is all irregular solid, and theoretically aggregate particle certainly exists a maximum grain size, claims this most in this method
Big grain size is " main shaft " of the aggregate particle.Using Image-pro premier and MATLAB softwares processing figure after CT scan
Picture and each transfer parameter for calculating four kinds of marking particle pointers and main shaft, transfer parameter includes Lx、Ly、Lz、Lxoy、ZφAnd rolling
Parameter alpha, αΔx、αΔy、αΔz, as a result as shown in Table 3, 4.
Since test specimen quality difference causes height when volume change in the vertical direction to reduce degree difference, only
Using LzThe characteristic of moving of characterization particle straight down does not have comparativity, this method to use relative indicatrix Z for different test specimensφ
Instead of.
Wherein, ZφThe relative value moved for aggregate particle displacement straight down；Δ h is test specimen after bitumen mixture specimen compacting
Height change value；LxIt is aggregate particle in compacting process in the displacement of X axis, LyIt is the aggregate particle in compacting process in Y-axis
To displacement, LxoyFor the displacement of the aggregate particle in compacting process in the horizontal plane, LzFor gathering materials in compacting process
Grain migration value straight down；α is the spatial rotational angle of aggregate particle pointer or main shaft in compacting process, αΔxFor compacting process
The angle of middle aggregate particle pointer or main shaft and X-axis, αΔyFor the angle of aggregate particle pointer or main shaft and Y-axis in compacting process,
αΔzFor the angle of aggregate particle pointer or main shaft and Z axis in compacting process.
Each index Test result of 3 1#, 2# particle of table
Each index Test result of main shaft of 4 3#, 4# particle of table
For the aggregate particle of 13.2mm, since to inlay difficulty larger for pointer, so quasi- ground using this index of main shaft
Study carefully the migration mechanism of particle.To verify the accuracy of reasonability and result of calculation that main shaft index proposes, using 1#'s and 2#
Pointer index carries out correlation test to main shaft index, as shown in Figure 2.
As shown in Figure 2,1# particles charging finish compacting 8 times during, reflect particle migration rule pointer with
The relative coefficient of the main shaft of particle is up to 0.986, be compacted 8 times to be compacted 100 times during, correlation system between the two
Number is 0.883；2# particles charging finish compacting 8 times during, the relative coefficient of pointer and main shaft is up to 0.99,
During compacting 8 times to 100 times, relative coefficient between the two is also up to 0.973.This just illustrates, defined particle
The rule that three dimensions main shaft is reflected is consistent with the rule that pointer is reflected, therefore for the aggregate particle of 13.2mm, is referring to
Needle inlay difficulty it is larger in the case of, this index of main shaft may be used completely to probe into the migration mechanism of particle.
Step 4：Mineral aggregate migratory behaviour analysis in compacting process
For the ease of comparing, data in table 3,4 are taken into positive value, displacement and index the angle parameter difference of pointer
As shown in Figure 2-5.
3,4 and Fig. 2 of table, 3 are considered it is found that being more than in water in the downward displacement of two packing stage 1# and 3# particles
The amount of migration in plane, and the amount of migration of 2# particles and 4# particles in the horizontal plane is more than downward displacement.This illustrates pitch
In the entire compacting process of mixture, gathering materials at the middle and upper levels mainly migrates downward into, and the main generation water that gathers materials of middle lower layer
It puts down to migration.With the increase of specimen thickness, the vertical active force of load gradually weakens, therefore aggregate particle at the middle and upper levels is vertical
Downward the amount of migration is bigger than the vertical migration amount of middle lower layer's aggregate particle.
The Space Rotating angle of 1# particles and 2# particles known to Fig. 4-6 is all higher than 3# particles and 4# particles, this explanation
The Space Rotating angle that grain occurs is related with the grain size of particle, and coarse granule generates larger effective rolling since torque is larger,
This rolling mostly occurs in the horizontal plane, and the rotation angle of vertical direction then very little, this is because the orientation of main shaft is initial
Parallel with horizontal plane under state, this state is the relatively stable state in aggregate particle compacting process, so being compacted
Main shaft is minimum along the variable angle of Z axis in journey.
Step 5：Mineral aggregate Influencing Factors of Migration is analyzed
7 different type mixture compacting process particle migration index of table
The particle migration index in compacting process of different type asphalt is different as shown in Table 7.OGFC-13
The transfer parameter of grain is less than normal compared to the transfer parameter of AC-13 particles, this is because there are more in gap-graded mix
Coarse aggregate will overcome intergranular contact friction that migration occurs more difficult under external force.
The different nominal maximum aggregate size mixture compacting process particle migration indexs of table 8
By the transfer parameter of 13.2mm particles in different nominal maximum aggregate size mixtures known to table 8 almost without too big difference
Not.
The mixture compacting process particle migration index of 9 different pitches dosage of table
Particle migration index of the mixture of different pitches dosage in compacting process is different as shown in Table 7.With oilstone
The horizontal direction the amount of migration of the increase of ratio, 3# and 4# particles is larger, and the angle that spatial rotational occurs for particle is also larger, intergranular to connect
Touch rubbing action due to bituminous cements lubrication and decrease to some degree, particle are relatively easy to migrate.
Particle migration index during shaping test piece under the different compacting temperatures of table 10
As shown in Table 10 for the asphalt in different compacting temperatures, particle migration index is different.With compacting
The viscosity of the raising of temperature, bituminous cements is declined, and intergranular contact friction function reduces, ZφIt increased, be in
The displacement straight down of 3# particles at the middle and upper levels is bigger relative to the increased amplitude of 4# particles.In addition LxoyAlso gradually increase with α
Greatly, after temperature is higher than 140 DEG C, horizontal direction displacement and three dimensional angle it is increased more significantly.
Step 5：The validation verification of the mineral aggregate migration evaluation method of asphalt compacting process
The evaluation method of proposition is that migration index is bigger in the application standard of the present embodiment, and mineral aggregate migratory behaviour is more notable.
Migration index is calculated by evaluation method, finds that the compactingproperties of different types of asphalt show presence through analysis
Difference, gap-graded mix limit the migration and rolling of particle due to coarse aggregate formation skeleton, and what is showed is more difficult
Compacting, this has stronger anti-shear ability after making its open to traffic.Although the compactingproperties of same type dense-graded mix
It is had a certain difference since coarse aggregate grain size is different, but its compactingproperties is easier to be influenced by bituminous cements,
Asphalt content is more and compacting temperature is higher can all increase intergranular lubricating effect, rub so as to cause intergranular contact
Reduce, particle migration and rolling variation increase.The conclusion and existing research and reality obtained by this evaluation method comparative analysis
The conclusion generally acknowledged in is almost the same, i.e. OGFC-13 mixtures compared to AC-13 mixtures, can compaction velocity it is relatively low, can press
Reality is poor, needs larger compaction energy.Asphalt content and compacting temperature can influence consolidation effect.This evaluation method passes through meter
It is practicable to calculate mineral aggregate and migrate index come the migratory behaviour for evaluating mineral aggregate particle.
The evaluation method of proposition is that compound geometric parameter is bigger in the application standard of the present embodiment, and the contact of mineral aggregate particle is made
With stronger, that is, the mineral aggregate skeleton structure formed will more be stablized.By evaluation method be calculated nominal maximum particle diameter with it is compound
Geometric parameter depends primarily on the proportion of coarse aggregate granule number in grading system without certain correlation；The mine of different gradation trend
Material Particles dispersed characteristic shows as grading lower limit (X)>Grading intermediate value (Z)>The grading upper limit (S).The mineral aggregate being made of basalt
Compound geometrical property is more than limestone mineral aggregate, while being affected by material source.Particle geometric characteristic directly determines composition mine
The compound geometrical property of material；The compound geometrical property size of mineral aggregate coarse aggregate of different gradation structure is OGFC>SMA>AC.Pass through this
The conclusion that evaluation method comparative analysis obtains and the conclusion generally acknowledged in existing research and practical application are almost the same, i.e. basalt shape
At mineral aggregate skeleton structure be better than limestone.Grading trend is from the upper limit when changing to lower limit, coarse aggregate proportion increase so that
Contact surface between mineral aggregate increases to act on skeleton embedded squeezing and enhance.The mineral aggregate skeleton stability of different gradation structure is OGFC>SMA>
AC.Therefore, this evaluation method is made by calculating the compound geometric index size of mineral aggregate coarse aggregate to evaluate the contact of mineral aggregate particle
It is practicable with skeleton structure stability.
The above content is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every to press
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within claims of the present invention
Protection domain within.
Claims (7)
1. a kind of measurement method of the mineral aggregate transfer parameter of asphalt compacting process, includes the following steps：
(1) it chooses multigroup different-grain diameter to gather materials, and the aggregate particle grain size in every group is identical, gather materials to each of every group
Grain is marked；
(2) aggregate particle of label is put into asphalt and carries out distribution gyratory compaction test by mixing asphalt；
(3) asphalt after compacting is scanned；
(4) it obtains image to scanning to handle, the aggregate particle coordinate marked is gathered materials according to aggregate particle coordinate
The transfer parameter of particle, transfer parameter include spatial migration parameter and rolling parameters；
Rolling parameters include：The spatial rotational angle [alpha] of aggregate particle, the angle α of aggregate particle and X-axisΔx, aggregate particle and Y-axis
Angle αΔy, the angle α of aggregate particle and Z axisΔz；
Spatial migration parameter includes：Displacement L of the aggregate particle in X axisx, displacement L of the aggregate particle in Y-axisy, gather materials
The displacement L of particle in the horizontal planexoy, aggregate particle migration value L straight downz, the dynamic phase of aggregate particle displacement straight down
To value Zφ；
ZφIt is calculated by formula 1；
Wherein, Δ h is height of specimen changing value after bitumen mixture specimen compacting.
2. the measurement method of the mineral aggregate transfer parameter of asphalt compacting process according to claim 1, feature exist
In further comprising the steps of：(5) transfer parameter of the aggregate particle obtained according to step 4, analysis gather materials particle migration influence because
Element determines the evaluation criterion of aggregate particle migration.
3. the measurement method of the mineral aggregate transfer parameter of asphalt compacting process according to claim 1, feature exist
In the method that aggregate particle described in step 1 is marked is to inlay iron wire respectively to aggregate particle or wrap reduced iron powder.
4. the measurement method of the mineral aggregate transfer parameter of asphalt compacting process according to claim 3, feature exist
In, the method that the aggregate particle inlays iron wire is to drill through the hole of corresponding iron wire length on aggregate particle surface using electric drill, to
Thermosetting epoxy resin is injected in hole, is then inlaid into iron wire in hole securely；
The method that the aggregate particle wraps reduced iron powder is, in aggregate particle surface smear epoxy resin, then by reduced iron
Powder is uniformly applied to aggregate particle surface.
5. the measurement method of the mineral aggregate transfer parameter of asphalt compacting process according to claim 1, feature exist
In the specific method is as follows for multi-step rotation compaction test described in step 2：
Mixing asphalt is divided into more parts, more parts of asphalts are sequentially placed into test piece mould, and adjacent two
Placed between part asphalt every group that step 1 obtains gather materials in an aggregate particle, same group of aggregate particle in every layer
Positioned at same axis；
Test piece mould equipped with asphalt is put into baking oven under compacting temperature and keeps the temperature 60min-90min, is then being revolved
Turn to be compacted asphalt stage by stage on compactor.
6. the measurement method of the mineral aggregate transfer parameter of asphalt compacting process according to claim 5, feature exist
In the specific side of the scanning is as follows：The asphalt waits for that it is cooled to after each packing stage be repeatedly compacted
Room temperature is scanned by X-ray CT, obtains the image of multiple tomographies.
7. the measurement method of the mineral aggregate transfer parameter of asphalt compacting process according to claim 2, feature
It is, the influence factor of the transfer parameter is mix type, nominal maximum aggregate size, asphalt content and compacting temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765102A (en) * | 2019-03-13 | 2019-05-17 | 长安大学 | A kind of asphalt multi-step rotation debulking methods and its application |
| CN109765103A (en) * | 2019-03-13 | 2019-05-17 | 长安大学 | A kind of asphalt particle marker and method for tracing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050124241A1 (en) * | 2003-12-06 | 2005-06-09 | Malik Tariq M. | Vapor barrier |
| CN102879276A (en) * | 2012-09-21 | 2013-01-16 | 长安大学 | Integrated asphaltic mixture performance detection device |
| CN103558236A (en) * | 2013-10-30 | 2014-02-05 | 哈尔滨工业大学 | Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT) |
| CN106651896A (en) * | 2016-09-30 | 2017-05-10 | 南京航空航天大学 | Material classification method of CT images of asphalt mixture |
-
2018
- 2018-01-27 CN CN201810080173.7A patent/CN108362715B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050124241A1 (en) * | 2003-12-06 | 2005-06-09 | Malik Tariq M. | Vapor barrier |
| CN102879276A (en) * | 2012-09-21 | 2013-01-16 | 长安大学 | Integrated asphaltic mixture performance detection device |
| CN103558236A (en) * | 2013-10-30 | 2014-02-05 | 哈尔滨工业大学 | Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT) |
| CN106651896A (en) * | 2016-09-30 | 2017-05-10 | 南京航空航天大学 | Material classification method of CT images of asphalt mixture |
Non-Patent Citations (1)
| Title |
|---|
| 谢军 等: "蠕变剪切试验前后粗集料运动轨迹的数字图像分析", 《土木工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765102A (en) * | 2019-03-13 | 2019-05-17 | 长安大学 | A kind of asphalt multi-step rotation debulking methods and its application |
| CN109765103A (en) * | 2019-03-13 | 2019-05-17 | 长安大学 | A kind of asphalt particle marker and method for tracing |
| CN109765102B (en) * | 2019-03-13 | 2021-06-25 | 长安大学 | Step-by-step rotary compaction method for asphalt mixture and application thereof |
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