CN109765102B - Step-by-step rotary compaction method for asphalt mixture and application thereof - Google Patents
Step-by-step rotary compaction method for asphalt mixture and application thereof Download PDFInfo
- Publication number
- CN109765102B CN109765102B CN201910190091.2A CN201910190091A CN109765102B CN 109765102 B CN109765102 B CN 109765102B CN 201910190091 A CN201910190091 A CN 201910190091A CN 109765102 B CN109765102 B CN 109765102B
- Authority
- CN
- China
- Prior art keywords
- compaction
- asphalt mixture
- rotary
- curve
- migration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses a step-by-step rotary compaction method for an asphalt mixture for revealing a mineral aggregate migration rule, which comprises the following steps of: stirring the asphalt mixture; carrying out a rotary compaction test on the asphalt mixture; drawing a compaction curve of the asphalt mixture; carrying out regression analysis on the compaction curve of the asphalt mixture to obtain an equation representing a rotary compaction curve; fitting a compaction curve of the asphalt mixture, and judging a compaction process according to the fit curve; a step compaction schedule is determined. The invention also provides application of the step-by-step rotary compaction method in revealing the migration rule of the mineral aggregate. According to the step-by-step rotary compaction method for revealing the migration rule of the mineral aggregate, provided by the invention, the times of performing segmented compaction on the test piece are determined, and the migration behavior of the asphalt mixture in the compaction process is researched from a micro visual level by combining a particle marking technology, a CT scanning technology and image processing software, so that the design, analysis and performance prediction level of the asphalt mixture are improved.
Description
Technical Field
The invention belongs to the technical field of road engineering, and particularly relates to a step-by-step rotary compaction method for an asphalt mixture and application thereof.
Background
The compaction process of the asphalt mixture is a process of gradually compacting the mixture under the action of an external load. In the process, the asphalt mixture is gradually transited from a loose state to a cohesive state with high tensile strength, contact points among particles are gradually increased, gaps among the particles are gradually reduced, the temperature is restored to normal temperature along with the completion of compaction, and the asphalt mixture forms an integral structure with certain strength and bearing capacity. The formation process of the spatial distribution state of the structural components is the movement and migration process of the aggregate particles of the asphalt mixture no matter in the compaction process of the pavement or the damage process of the pavement. In the paving and compacting process of the asphalt pavement, the asphalt mixture needs to overcome the interface effect of aggregate particles, and the structure self-organization is realized through the migration of mineral aggregate, so that the stable state is achieved.
The particle migration mechanism of the asphalt mixture not only runs through the stages of stirring, paving, compacting and the like of the asphalt mixture, but also determines the compacting effect and the mechanical property of the asphalt mixture to a great extent, influences the service performance of the asphalt pavement in the service period and has close relation with the disease generation and the durability of the asphalt pavement. In recent years, research on asphalt mixtures from a microscopic level is increasingly gaining attention in the field of road engineering research, and many researchers use image processing techniques or discrete element numerical simulation software to research on the microscopic structure and strength formation mechanism of asphalt mixtures. However, most of the researches only carry out researches on the compacted test piece, and the micro-visual effect of the asphalt mixture in the compacting process is rarely emphasized.
Based on the method, the invention provides a step-by-step rotary compaction method for revealing the migration rule of the mineral aggregate to explore the migration behavior of the asphalt mixture in the compaction process.
Disclosure of Invention
Aiming at the defects of the existing research, the invention provides a step-by-step rotary compaction method for an asphalt mixture, which reveals the migration rule of mineral aggregates.
The invention aims to provide a method for compacting an asphalt mixture by rotating step by step for revealing the migration rule of mineral aggregates, which comprises the following steps:
s1, stirring the asphalt mixture and forming a test piece;
s2, rotating the test piece in S1Compaction test and measurement of the maximum theoretical density G of the bituminous mixture during the testmmAnd bulk density G of the test piecembAnd calculating the compactness ratio gamma under the condition of reaching the designed compaction timesdesAnd the density ratio gamma at the number of compactions corresponding to iiThe specific calculation formula is shown as formula (1) and formula (2):
in the formula (2), hdesTo achieve the test piece height at the designed compaction times, i is the compaction times, hiThe height of the test piece is the corresponding compaction number of the i;
drawing a rotary compaction curve of the asphalt mixture by taking the compaction times i as a horizontal coordinate and taking the compactness ratio gamma i under the corresponding compaction times as a vertical coordinate; carrying out regression analysis on the rotary compaction curve of the asphalt mixture to obtain an equation representing the rotary compaction curve; fitting the rotary compaction curve of the asphalt mixture to obtain a fitting curve;
s3, calculating the compaction rate C based on the fitted curvedBased on the compaction rate CdDetermining a step-by-step compaction scheme;
wherein, CdDefined as the compaction ratio gamma at i compaction timesiDensity ratio of paving0Difference of (d) and compactness ratio gamma at designed compaction timesdesDensity ratio of paving0The ratio of the difference of (a) to (b) is shown in equation (3):
calculating the corresponding gamma of the compaction rate at 50% + -2%iCalculating the corresponding compaction times i by combining the rotary compaction curve equation and the gamma i value, and finally calculating the corresponding compaction times i according to the valuesi, determining a step-by-step compaction scheme;
the step-by-step compaction scheme is as follows: compacting the i times, and then compacting the designed compaction times to subtract the i times.
Preferably, the designed compaction number is 100. The design compaction count of 100 is chosen in the present invention because the SHAR program specifies a gyratory compaction test design compaction count of 100.
The second purpose of the invention is to provide an application of the asphalt mixture step-by-step rotary compaction method in revealing the migration law of mineral aggregates, which comprises the following steps:
s1, selecting the labeled particle;
s2, stirring the asphalt mixture, placing the marking particles selected in the S1 in the asphalt mixture to form a test piece, and then carrying out a particle tracking test;
and S3, compacting and scanning the test piece in the S2 step by adopting the step-by-step compaction scheme, and then processing the scanned image to obtain a migration parameter change trend which reveals the migration rule of the mineral aggregate.
Preferably, the marking particles are aggregate particles embedded with iron wires and aggregate particles coated with reduced iron powder.
Preferably, in S3, Image-pro premier and MATLAB software are used to process the scanned Image.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a step-by-step rotary compaction method for revealing a mineral aggregate migration rule, and provides a method for determining a step-by-step compaction scheme for a test piece.
Drawings
FIG. 1 is a graph of the gyratory compaction of the AC-20b asphalt mix of example 1;
FIG. 2 is a plot of a fit to the gyratory compaction curve of FIG. 1;
FIG. 3 is a graph showing the variation of the compaction ratio of each test piece in example 4 at different gradation;
FIG. 4 is a graph showing the variation of compaction rate of the AC-20b test pieces in example 4 at different compaction temperatures
FIG. 5 is a schematic view showing the distribution of the labeled particles in example 5;
FIG. 6 is a graph of displacement indicators for marking particles for two stages of compaction in example 5;
figure 7 is a rolling index plot of the marked particles for two stages of compaction in example 5.
Detailed Description
In order to make the technical solutions of the present invention better understood and implemented by those skilled in the art, the present invention is further described below with reference to the following specific embodiments and the accompanying drawings, but the embodiments are not meant to limit the present invention.
Example 1
A step-by-step rotary compaction method for an asphalt mixture comprises the following steps:
and S1, stirring the asphalt mixture and forming a test piece, wherein the diameter of the formed test piece is 100mm, and the design height is 115 mm.
The test adopts Zhonghai 36-1 matrix asphalt, and the basic properties of the matrix asphalt are shown in Table 1 by referring to the relevant requirements of road engineering asphalt and asphalt mixture test procedure (JTJ 052-2000).
TABLE 1 fundamental Properties of the bitumens
In the test, the AC-20b asphalt mixture is stirred by using the ground limestone, and the oil-stone ratio of the AC-20b asphalt mixture is 4.0%.
S2, carrying out rotary compaction test on the AC-20b asphalt mixture molding test piece, deriving data from a rotary compaction instrument, and measuring the maximum theoretical density G of the AC-20b asphalt mixturemmAnd bulk density G of the test piecemb2.236 and 2.329, respectively, up to 100 times the designed gyratory compaction was calculatedDensity ratio gamma at timesdesAnd the compactness ratio gamma at the number of compactions corresponding to iiThe specific calculation formula is as shown in formula (1) and formula (2):
in the formula (2), i is the number of compaction times, hiThe height of the test piece is the corresponding compaction number of the i;
h is obtained according to the compaction times corresponding to each iiCalculating the measured later income formula (2) to obtain the compactness ratio under the compaction times corresponding to the compaction times i, and then taking the compaction times i as the abscissa and corresponding to the compactness ratio h under the compaction timesiAnd drawing a rotary compaction curve of the AC-20b asphalt mixture in the rotary compaction process as an ordinate, wherein the curve is specifically shown in figure 1.
Performing regression analysis on the rotary compaction curve of the AC-20b asphalt mixture by adopting Origin data processing software to obtain an equation for representing the rotary compaction curve, wherein the equation is specifically shown in the formula (4):
γi＝aib (4)
the gyratory compaction curve shown in FIG. 1 was fitted by Origin data analysis software according to the equation above, and the results are shown in FIG. 2, yielding the parameters associated with the equation: and a is 80.936, b is 0.0372, and the correlation coefficient is 0.998, so that the relationship between the compactness ratio and the compaction times in the rotary compaction process of the AC-20b asphalt mixture can be obtained, as shown in formula (5):
γi＝80.936i0.0372 (5)；
s3, calculating compaction ratio C based on equation (5)dBased on the compaction rate CdDetermining a step-by-step compaction scheme;
cd is defined as the compaction ratio gamma i to the paving compaction ratio gamma for i compaction times0Difference of (2) and compactness at designed compaction timesRatio gammadesDensity ratio of paving0The ratio of the difference of (a) to (b) is shown in equation (3):
as can be seen from fig. 2, the early-stage compaction rate is high, the later-stage compaction rate is low, and if the stepped compaction interval is too large, the mineral aggregate migration rule is difficult to observe; if the step compaction interval is too small, there may be little later particle migration variation and small data differences, which is a cost waste for CT scanning.
Setting the designed compaction frequency as 100 and the compactness ratio gamma when the designed compaction frequency is 100desThe compaction ratio γ at each compaction number was calculated by the formula (5) at 96%iThen the calculated compactness ratio and gamma are calculated0、γdesThe value of (2) is substituted into the formula (3) for calculation, and the calculation result is that when the compaction frequency reaches 8 times, the compaction rate can reach 50%, and after the subsequent 92 times of rotary compaction, the compaction rate reaches 100%. In the test, when the compaction rate is 50% +/-2%, when the migration rule of the mineral aggregate is marked by the marking particles, the migration path of the mineral can be seen more clearly, so that the migration rule of the mineral can be revealed more easily.
For the reasons described above, we determined a step compaction schedule to be: the stepped compaction schedule was determined as shown in table 2 with an initial compaction number of 8 followed by 92 compactions to 100 designed compaction numbers.
TABLE 2 AC-20b step compaction protocol
Example 2
A method for the stepwise rotary compaction of an asphalt mixture is the same as that in example 1 except that the asphalt mixture in example 1 is changed from AC-20b to AC-20a, the oilstone ratio in AC-20a is 4.1%, and the stepwise compaction scheme determined in example 2 is shown in Table 3.
TABLE 3 AC-20a step compaction protocol
Example 3
A method for the step-by-step rotary compaction of an asphalt mixture is the same as that in example 1, except that the asphalt mixture in example 1 is changed from AC-20b to AC-20c, the oilstone ratio in AC-20c is 4.2%, and the step-by-step compaction scheme obtained in example 3 is shown in Table 4.
TABLE 4 AC-20c step compaction protocol
Example 4
In order to verify the compaction effect of the step-by-step compaction scheme of the invention, the compaction schemes determined in examples 1-3 were applied to the compaction process of an AC-20 asphalt mixture, and the specific steps were as follows:
s1, mixing the asphalt mixtures with different grades and different asphalt dosages by using the finely ground limestone, wherein the types of the mixed asphalt mixtures are as follows: AC-20a, AC-20b and AC-20c, wherein the AC-20a, the AC-20b and the AC-20c are all stirred into a plurality of parts, and the limestone gradation is shown in Table 5;
wherein, except AC-20b, the compaction temperature of other asphalt mixtures is 140 ℃;
the compacting temperature adopted by AC-20b is 110 ℃, 125 ℃, 140 ℃, 155 ℃ and 170 ℃ respectively;
TABLE 5 test grading
The step-by-step compaction scheme obtained in examples 1 to 3 was used to form corresponding test pieces, calculate the compaction rate of the asphalt mixture under different conditions, and plot the variation curve of the compaction rate with the grading structure and the compaction temperature, as shown in fig. 3 to 4.
Fig. 3 is a graph showing the variation of the compaction rate of each test piece under different grading, and as shown in fig. 3, the variation of the compaction rate of the asphalt mixture with different grading along with the variation of the compaction times is obvious.
The compaction ratio curves for AC-20b at different temperatures are shown in fig. 4, with the compaction ratio varying slightly with increasing temperature after 8 compactions in the range of 40% to 51%. When the temperature is lower than 140 ℃, the compaction rate of the asphalt mixture after 8 times of compaction is increased along with the increase of the temperature; when the temperature is higher than 140 ℃, the compaction rate decreases with increasing temperature. This indicates that the optimum temperature is consistent with the optimum compaction temperature obtained from the viscosity-temperature curve of the asphalt.
From fig. 3-4, it can be seen that there are significant differences between the compaction rate curves at different grading configurations and different compaction temperatures, i.e. the compaction results are apparent at different stages using the step compaction protocol proposed in examples 1-3.
Example 5
In order to verify the role of the stepped compaction scheme in disclosing the migration law of mineral aggregates, the compaction scheme determined in example 1 is applied to the disclosure of the migration law of mineral aggregates in an AC-20b asphalt mixture, and the specific steps are as follows:
two aggregate particles with the particle sizes of 19.0mm (marked as 1# and 2#) and 13.2mm (marked as 3# and 4#) are selected to be respectively treated by inlaying iron wires (1# and 2#) and coating reduced iron powder (3# and 4#) so as to be convenient for CT scanning and image processing analysis.
The AC-20b asphalt mixture is mixed and evenly divided into three layers, 2# and 4# marking particles are respectively placed between the bottom layer asphalt mixture and the middle layer asphalt mixture, 1# and 3# marking particles are respectively placed between the middle layer asphalt mixture and the upper layer asphalt mixture, and the placing positions of the particles are shown in figure 5.
And compacting and scanning the test piece step by step. Compacting for 8 times, recording as N0-N8, taking out after the test piece is cooled, and carrying out CT scanning. Compaction was then continued 92 times, designated as N9-N100, and after cooling, demolding and scanning were performed.
Processing a large number of tomograms acquired by CT scanning by using Image-pro premier and MATLAB software to calculate the displacement L of the four marked particles in different directions in two compaction stagesx、Ly、Lz、LxoyAnd the rolling angles alpha, alphaΔx、αΔy、αΔzWherein Lx is the displacement of the aggregate particles in the X-axis direction, LyIs the displacement of the aggregate particles in the Y-axis direction, LzIs the displacement of the aggregate particles in the Z-axis direction, LxoyIs the displacement of the aggregate particles in the horizontal plane; alpha is the spatial rotation angle of the aggregate particles, alpha deltaxIs the angle between the aggregate particles and the X-axis, alpha DeltayIs the angle between the aggregate particles and the Y axis, alpha DeltazFor the angle between the aggregate particles and the Z-axis, the specific measurement method is disclosed in another patent of the present application, application No. 201810080173.7, entitled method for measuring mineral aggregate migration parameters in asphalt mixture compacting process.
The results of the tests are shown in fig. 6 and 7, where fig. 6 is a graph of displacement indices for marking particles for two stages of compaction and fig. 7 is a graph of rolling indices for marking particles for two stages of compaction. As can be seen from fig. 6 and 7, the particles # 1 and # 3 in the middle and upper layers are displaced vertically downward more than their horizontal displacements, while the particles # 2 and # 4 are displaced horizontally more than their vertical displacements downward. The spatial rotation angles of the particles 1# and 2# are both greater than 3# and 4#, which shows that the spatial rotation angles of the particles are related to the particle sizes of the particles, and the particles with larger particle sizes produce larger effective rolling due to larger torque. Since the principal axis orientation is at a small, nearly parallel angle to the Z-axis when the four marker particles are initially placed, the rotation in the vertical direction during the gyratory compaction process is relatively small. Fig. 6 and 7 can clearly reveal the mineral aggregate migration rule of the asphalt mixture in the compaction process, so that the step-by-step compaction scheme provided by the invention has a good effect on revealing the mineral aggregate migration rule in the compaction process.
While the present invention has been described with respect to preferred embodiments, additional variations and modifications will occur to those embodiments once the basic inventive concepts are known to those skilled in the art. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The method for rotary compacting the asphalt mixture step by step is characterized by comprising the following steps of:
s1, stirring the asphalt mixture and forming a test piece;
s2, performing a rotary compaction test on the test piece in the S1, and measuring the maximum theoretical density G of the asphalt mixture in the test processmmAnd bulk density G of the test piecembAnd calculating the compactness ratio gamma under the condition of reaching the designed compaction timesdesAnd the density ratio gamma at the number of compactions corresponding to iiThe specific calculation formula is shown as formula (1) and formula (2):
in the formula (2), hdesTo achieve the test piece height at the designed compaction times, i is the compaction times, hiThe height of the test piece is the corresponding compaction number of the i;
taking the compaction frequency i as the abscissa and corresponding to the compactness ratio gamma under the compaction frequencyiDrawing a rotary compaction curve of the asphalt mixture as a vertical coordinate; carrying out regression analysis on the rotary compaction curve of the asphalt mixture to obtain a characterization rotary compaction curveThe equation of (c); fitting the rotary compaction curve of the asphalt mixture to obtain a fitting curve;
s3, calculating the compaction rate C based on the fitted curvedBased on the compaction rate CdDetermining a step-by-step compaction scheme;
wherein, CdDefined as the compaction ratio gamma at i compaction timesiDensity ratio of paving0Difference of (d) and compactness ratio gamma at designed compaction timesdesDensity ratio of paving0The ratio of the difference of (a) to (b) is shown in equation (3):
calculating the corresponding gamma of the compaction rate at 50% + -2%iValue, combined with the gyratory compaction curve equation and said gammaiCalculating the value of the corresponding compaction times i, and finally determining a step-by-step compaction scheme according to the value i;
the step-by-step compaction scheme is as follows: compacting the i times, and then compacting the designed compaction times to subtract the i times.
2. The method of claim 1 wherein the designed number of compaction cycles is 100.
3. The use of the method of claim 1 for the stepwise rotary compaction of asphalt mixtures to reveal the law of mineral aggregate migration.
4. The application of the asphalt mixture step-by-step rotary compaction method to the revelation of the migration law of mineral aggregates according to claim 3 is characterized by comprising the following steps:
s1, selecting the labeled particle;
s2, stirring the asphalt mixture, and placing the marking particles selected in the S1 into an asphalt mixture to form a test piece;
and S3, compacting and scanning the test piece in the S2 step by adopting the step-by-step compaction scheme, and then processing the scanned image to obtain a migration parameter change trend which reveals the migration rule of the mineral aggregate.
5. Use of the method of claim 3 for revealing the law of mineral migration, characterized in that said marking particles are aggregate particles lined with iron wires and aggregate particles coated with reduced iron powder.
6. The application of the asphalt mixture step-by-step rotary compaction method to the revelation of the migration law of mineral aggregates according to claim 3 is characterized in that the scanned Image is processed by using Image-pro preier and MATLAB software in S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190091.2A CN109765102B (en) | 2019-03-13 | 2019-03-13 | Step-by-step rotary compaction method for asphalt mixture and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190091.2A CN109765102B (en) | 2019-03-13 | 2019-03-13 | Step-by-step rotary compaction method for asphalt mixture and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109765102A CN109765102A (en) | 2019-05-17 |
| CN109765102B true CN109765102B (en) | 2021-06-25 |
Family
ID=66458984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910190091.2A Expired - Fee Related CN109765102B (en) | 2019-03-13 | 2019-03-13 | Step-by-step rotary compaction method for asphalt mixture and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109765102B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834369A (en) * | 2020-12-30 | 2021-05-25 | 江西省交通科学研究院 | Method for determining reasonable water content of solid waste doped road base material |
| CN113218792B (en) * | 2021-05-20 | 2022-12-02 | 上海公路桥梁（集团）有限公司 | Method and system for judging interlocking point in asphalt mixture rotary compaction process |
| CN114034847A (en) * | 2021-11-09 | 2022-02-11 | 长安大学 | Asphalt mixture compaction monitoring device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271950A (en) * | 2015-11-30 | 2016-01-27 | 苏交科集团股份有限公司 | Foam warm mixing recycled asphalt mixture, preparation method and performance evaluation method |
| CN106570206A (en) * | 2016-09-30 | 2017-04-19 | 南京航空航天大学 | Designed compaction number-of-times determining method of emulsified asphalt cold recycled mixture |
| CN108362715A (en) * | 2018-01-27 | 2018-08-03 | 长安大学 | A kind of measurement method of the mineral aggregate transfer parameter of asphalt compacting process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122601A (en) * | 1996-03-29 | 2000-09-19 | The Penn State Research Foundation | Compacted material density measurement and compaction tracking system |
-
2019
- 2019-03-13 CN CN201910190091.2A patent/CN109765102B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271950A (en) * | 2015-11-30 | 2016-01-27 | 苏交科集团股份有限公司 | Foam warm mixing recycled asphalt mixture, preparation method and performance evaluation method |
| CN106570206A (en) * | 2016-09-30 | 2017-04-19 | 南京航空航天大学 | Designed compaction number-of-times determining method of emulsified asphalt cold recycled mixture |
| CN108362715A (en) * | 2018-01-27 | 2018-08-03 | 长安大学 | A kind of measurement method of the mineral aggregate transfer parameter of asphalt compacting process |
Non-Patent Citations (1)
| Title |
|---|
| 基于superpave的机场环氧沥青混合料配合比设计;冉武平;《重庆交通大学学报》;20170430;第36卷(第4期);31 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109765102A (en) | 2019-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109765102B (en) | Step-by-step rotary compaction method for asphalt mixture and application thereof | |
| Li et al. | Analysis of aggregate particle migration properties during compaction process of asphalt mixture | |
| Lv et al. | Influence of gradation on asphalt mix rutting resistance measured by Hamburg Wheel Tracking test | |
| CN104406993B (en) | A kind of method of new Bituminous concrete surface degrees of fusion in detection heat regeneration asphalt mixture | |
| CN104372727B (en) | The mixing proportion design method of normal temperature modified asphalt | |
| CN109575618A (en) | A kind of compound rock asphalt tracking-resisting modifier of graphene and preparation method thereof | |
| CN107722649A (en) | A kind of modified pitch and its preparation and application | |
| Korayem et al. | Laboratory evaluation of stone mastic asphalt containing amorphous carbon powder as filler material | |
| Wang et al. | Morphological characteristics of mineral filler and their influence on active adhesion between aggregates and bitumen | |
| Al-Saad et al. | Rutting prediction of hot mix asphalt mixtures reinforced by ceramic fibers | |
| CN102967520A (en) | Method for measuring aggregate crushing value | |
| Xue et al. | Long-term skid resistance of high-friction surface treatment of pavement using high-alumina refractory waste | |
| Nie et al. | Designing of an anti-rutting and High Ductility Asphalt Mixture based on mortar performance | |
| Chen et al. | Influence of asphalt mixture workability on the distribution uniformity of asphalt, aggregate particles and asphalt film during mixing process | |
| Cui et al. | Texture characteristic and its enhancement mechanism in stone mastic asphalt incorporating steel slag | |
| CN108362715B (en) | Method for measuring mineral aggregate migration parameter in asphalt mixture compaction process | |
| Huan et al. | Evolution of texture and skid resistance change of high-friction surface due to differential-polishing undergoing simulated traffic wear | |
| Huang et al. | Experimental study on the fatigue performance of emulsified asphalt cold recycled mixtures | |
| Zhang et al. | Self-healing properties of nano-montmorillonite-enhanced asphalt binders from the perspective of energetics and morphology | |
| CN107860665A (en) | A kind of method of testing of Rigid-flexible composite of the road structure rut | |
| CN110489923B (en) | Method for estimating plastic strain of graded broken stone mixture under repeated loading effect | |
| Sun et al. | Study on deformation behavior and prediction model of asphalt mixture based on interface-slip characteristics of aggregates | |
| Li et al. | Performance and mechanism evaluation of dopamine-hexamethylene diamine-iron tetraoxide composite rubber powder incorporated styrene-butadiene-styrene modified asphalt | |
| CN111665345B (en) | Asphalt bonding and lubricating transition behavior determination method based on particle contact effect | |
| Jiang et al. | Micro-structural characterization of the lubrication behavior of asphalt binder during the compaction of asphalt mixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210625 |