CN114171132A - Fatigue stress resistant absorbing layer mix proportion design method - Google Patents
Fatigue stress resistant absorbing layer mix proportion design method Download PDFInfo
- Publication number
- CN114171132A CN114171132A CN202110999660.5A CN202110999660A CN114171132A CN 114171132 A CN114171132 A CN 114171132A CN 202110999660 A CN202110999660 A CN 202110999660A CN 114171132 A CN114171132 A CN 114171132A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- oac
- fatigue
- fatigue life
- value
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000013461 design Methods 0.000 title claims abstract description 10
- 239000010426 asphalt Substances 0.000 claims abstract description 47
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 238000013001 point bending Methods 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract 2
- 239000004575 stone Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- RQJUZWRDCVBOMH-UHFFFAOYSA-N 4-fluoro-n-(1h-indol-5-yl)benzamide Chemical compound C1=CC(F)=CC=C1C(=O)NC1=CC=C(NC=C2)C2=C1 RQJUZWRDCVBOMH-UHFFFAOYSA-N 0.000 claims description 2
- 238000009661 fatigue test Methods 0.000 claims description 2
- 230000000750 progressive effect Effects 0.000 claims 2
- 208000037921 secondary disease Diseases 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000011800 void material Substances 0.000 abstract description 2
- 238000012935 Averaging Methods 0.000 abstract 1
- HWJRIFZDXJKJJN-UHFFFAOYSA-N n-(1h-pyrrolo[2,3-c]pyridin-5-yl)benzamide Chemical compound C=1C=2C=CNC=2C=NC=1NC(=O)C1=CC=CC=C1 HWJRIFZDXJKJJN-UHFFFAOYSA-N 0.000 abstract 1
- 101150038319 oac1 gene Proteins 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 12
- 239000010410 layer Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000011384 asphalt concrete Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002250 progressing effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/30—Prediction of properties of chemical compounds, compositions or mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/90—Programming languages; Computing architectures; Database systems; Data warehousing
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C60/00—Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00991—Uses not provided for elsewhere in C04B2111/00 for testing
Landscapes
- Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a design method of a fatigue stress resistant absorbing layer mix proportion, which is characterized by drawing a relation graph of asphalt use amount and physical and mechanical indexes, and drawing a test result into a relation curve of the asphalt use amount and each index by taking the asphalt use amount as an abscissa. The asphalt dosage a1 corresponding to the maximum stability, the asphalt dosage a2 corresponding to the maximum density and the asphalt dosage a3 corresponding to the median value of the void ratio range are obtained, and the average value of the three is obtained as the initial value OAC1 of the optimal asphalt dosage. And (3) respectively rolling and forming the mixture with five different oilstone ratios, and carrying out four-point bending fatigue life test on the asphalt mixture in a strain control loading mode. And performing three groups of parallel tests on the asphalt mixtures with different oilstone ratios, and averaging the results to obtain the optimal oilstone ratio OACfatigue considering the fatigue life. The method improves the fatigue performance of the designed stress absorption layer, reduces the possibility of secondary diseases caused by fatigue cracks during service, prolongs the service life of the pavement and is convenient for maintenance.
Description
Technical Field
The invention belongs to the technical field of road petroleum asphalt, and mainly relates to a design method of a fatigue-resistant stress absorbing layer mix proportion.
Technical Field
The fatigue crack is generated because the lower part of the asphalt concrete pavement is subjected to bending tensile stress under the action of the driving load, when the load is repeated for a certain number of times, the bending tensile strength of the asphalt concrete pavement material is reduced, and when the asphalt pavement can not bear the bending tensile stress generated by the driving load, the fatigue crack is generated on the asphalt pavement. Such cracks generally progress slowly from longitudinal cracks to reticular cracks. In addition, the aging of asphalt materials is also one of the major factors responsible for fatigue cracking.
A large number of researches and practices prove that from the position angle of the pavement structure, the lower layer is influenced most by bending and pulling stress, fatigue cracks are easy to generate and develop upwards, the fatigue cracks are different from other diseases, the fatigue cracks can develop rapidly under the action of traffic load and environmental factors after being generated and develop into local structural damage, and the damage seriously influences the pavement performance and the service life of the asphalt pavement. The stress absorption layer is originally used for relieving and dissipating bending and tensile stress, but the existing material design method does not take the fatigue performance of the mixture into consideration and is designed in a targeted manner.
The invention enriches the single design method of each surface layer material of the prior asphalt pavement and considers the fatigue performance in the stage of determining the optimal asphalt-stone ratio of the asphalt mixture. The invention has the beneficial effects that: based on the traditional method for determining the optimal oilstone ratio, under the condition that the material level is the same, the determination of the oilstone ratio is improved through a four-point bending fatigue life test, the fatigue performance of the designed stress absorption layer is improved, the fatigue crack generation is slowed down during the service period, the possibility of other secondary diseases is reduced, and the pavement performance and the service life of the asphalt pavement are improved.
Disclosure of Invention
The invention provides a design method of a fatigue stress resistant absorbing layer mix proportion. The purpose is as follows: 1. absorbing the internal stress of the asphalt layer under the action of dynamic load 2. improving the fatigue performance of the designed stress absorbing layer and inhibiting the generation and development of fatigue cracks; 3. the possibility of secondary diseases caused by fatigue cracks in the service period is reduced, the service life of the pavement is prolonged, and the maintenance is facilitated.
The technical scheme of the invention is as follows:
1. and (4) carrying out AC-13 grading design, and selecting five oilstone ratios to form Marshall test pieces.
2. And drawing a relation graph of asphalt dosage and physical and mechanical indexes, wherein the asphalt dosage is used as a horizontal coordinate, and the relative density, porosity, saturation, stability and flow value of the gross volume are used as vertical coordinates. And drawing the test result into a relation curve of the asphalt using amount and each index.
3. The asphalt dosage a1 corresponding to the maximum stability, the asphalt dosage a2 corresponding to the maximum density and the asphalt dosage a3 corresponding to the median value in the void ratio range are calculated, and the average value of the three is calculated as the initial value OAC of the optimal asphalt dosage1。
4. Calculating the asphalt dosage range OAC of which each index meets the technical standard of the asphalt mixturemin-OACmaxOf value of OAC for optimum asphalt dosage2。OAC1And OAC2The average value is the conventional optimum oilstone ratio OAC.
5. The five mixtures with different oilstone ratios are respectively rolled and formed and cut into standard four-point bending fatigue test pieces with the sizes of 385mm multiplied by 50mm multiplied by 65 mm.
6. And carrying out four-point bending fatigue life test on the asphalt mixture in a strain control loading mode. The test temperature is 15 ℃, the loading form is a half sine wave compression load, and the loading frequency is 25 Hz. The strain levels were 500. mu. epsilon., 600. mu. epsilon. and 700. mu. epsilon. Three groups of parallel tests are carried out on the asphalt mixtures with different oil-stone ratios, and the results are averaged. The termination condition was the decay of the progressing modulus to 50% of the initial progressing modulus.
7. Fatigue life N for the four-point bending fatigue life results at 15 ℃ and 25HzfAnd performing least square normal fitting with the strain level epsilon in a log-log coordinate to obtain a fatigue life equation, wherein the form of the fatigue life equation is shown in formula 1.
lgNf＝K-nlgε
8. And (3) performing unary quadratic linear fitting on a k value (intercept) representing the fatigue resistance in the fatigue equation and the oilstone ratio, wherein the oilstone ratio corresponding to the maximum value of the curve is the oilstone ratio corresponding to the maximum fatigue life of the asphalt mixture.
9. Redefining the OAC by taking the oilstone ratio corresponding to the maximum fatigue life as a midpoint and taking the difference between the oilstone ratio and the OAC with the traditional optimal oilstone ratio as an allowable rangemin-OACmaxTo obtain OAC3。
10.OAC1And OAC3Taking an average value to obtain the optimal oilstone ratio OAC considering the fatigue lifefatigue。
Drawings
FIG. 1 is a fatigue equation fitting result;
FIG. 2 shows the k value compared with that of oilstone;
fig. 3 is a flow chart of an optimum oilstone ratio considering fatigue life.
Detailed Description
Example (c): the new aggregate adopts 10-15mm, 5-10mm basalt, 0-5mm machine-made sand and mineral powder, and the asphalt adopts SBS modified asphalt. The grading type adopts AC-13, and the traditional optimal oilstone ratio OAC is 5.09%. Four-point bending fatigue life tests were performed on asphalt mixes with oilstone ratios of 4.0%, 4.5%, 5.0%, 5.5%, and 6.0% in a strain control loading mode. The test temperature is 15 ℃, the loading form is a half sine wave compression load, and the loading frequency is 25 Hz. The strain levels were 500. mu. epsilon., 600. mu. epsilon. and 700. mu. epsilon. Fatigue life NfAnd performing least square normal fitting on the strain level epsilon in a log-log coordinate to obtain a fatigue life equation, wherein the fatigue equations corresponding to the mixed materials with different oilstone ratios are shown in table 1. The k value (cutoff) for characterizing the fatigue resistance in the fatigue equationDistance) to oilstone ratio, a one-dimensional quadratic line fit was performed, and the results are shown in fig. 2. Within a reasonable range of the oil-to-stone ratio, there is an optimum oil-to-stone ratio that maximizes fatigue resistance of the mix.
The fitted curve in fig. 2 has the vertex coordinates of (5.22%, 19.2848), i.e., the optimum fatigue life corresponds to an oilstone ratio of 5.22%. The conventional optimum oilstone ratio OAC is 5.09%. Taking the fatigue life as one of the parameters for determining the optimal oilstone ratio, taking the oilstone ratio 5.22 percent corresponding to the maximum fatigue life as a midpoint, and taking the difference from the traditional optimal oilstone ratio as an allowable range, then OAC3The allowable range of the fatigue life was determined to be (5.09%, 5.35%). Calculating the improved optimum OACfatigueThe content was found to be 5.23%. The improved oilstone ratio is improved by 0.14 percent, which is beneficial to internal stress dissipation and prolongs the fatigue life of the mixture.
Claims (1)
1. A design method for the mix proportion of a fatigue stress resistant absorption layer is characterized in that: the method comprises the following steps of,
s1, carrying out AC-13 grading design, and selecting five oilstone ratios to form a Marshall test piece;
s2, drawing a relation graph of asphalt consumption and physical mechanical indexes, wherein the asphalt consumption is taken as a horizontal coordinate, and the relative density, porosity, saturation, stability and flow value of the gross volume are taken as vertical coordinates; drawing the test result into a relation curve of the asphalt consumption and each index;
s3, solving the asphalt using amount a1 corresponding to the maximum stability, the asphalt using amount a2 corresponding to the maximum density and the corresponding median asphalt using amount a3 in the porosity range, and solving the average value of the three as the initial value OAC of the optimal asphalt using amount1；
S4, calculating the asphalt dosage range OAC with each index meeting the technical standard of asphalt mixturemin-OACmaxOf value of OAC for optimum asphalt dosage2；OAC1And OAC2The average value is the conventional optimum oilstone ratio OAC;
s5, respectively rolling and forming the five mixtures with different oil-stone ratios, and cutting the mixtures into standard four-point bending fatigue test pieces with the sizes of 385mm multiplied by 50mm multiplied by 65 mm;
s6, carrying out four-point bending fatigue life test on the asphalt mixture in a strain control loading mode; the test temperature is 15 ℃, the loading form is a half sine wave compression load, and the loading frequency is 25 Hz; strain levels of 500. mu. epsilon., 600. mu. epsilon. and 700. mu. epsilon.; three groups of parallel tests are carried out on the asphalt mixtures with different oil-stone ratios, and the results are averaged; the termination condition is that the progressive modulus decays to 50% of the initial progressive modulus;
s7, comparing the four-point bending fatigue life results at 15 ℃ and 25Hz, determining the fatigue life NfPerforming least square normal fitting with the strain level epsilon in a log-log coordinate to obtain a fatigue life equation, wherein the form of the fatigue life equation is shown in a formula 1;
lgNf＝K-nlgε
s8, performing unitary quadratic linear fitting on a k value (intercept) representing the fatigue resistance in the fatigue equation and the oilstone ratio, wherein the oilstone ratio corresponding to the maximum value of the curve is the oilstone ratio corresponding to the maximum fatigue life of the asphalt mixture;
s9, redefining the OAC by taking the oilstone ratio corresponding to the maximum fatigue life as a midpoint and taking the difference value between the maximum fatigue life and the OAC as an allowable rangemin-OACmaxTo obtain OAC3；
S10.OAC1And OAC3Taking an average value to obtain the optimal oilstone ratio OAC considering the fatigue lifefatigue。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110999660.5A CN114171132B (en) | 2021-08-29 | 2021-08-29 | Design method for mixing proportion of fatigue-resistant stress absorbing layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110999660.5A CN114171132B (en) | 2021-08-29 | 2021-08-29 | Design method for mixing proportion of fatigue-resistant stress absorbing layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114171132A true CN114171132A (en) | 2022-03-11 |
| CN114171132B CN114171132B (en) | 2024-04-09 |
Family
ID=80476549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110999660.5A Active CN114171132B (en) | 2021-08-29 | 2021-08-29 | Design method for mixing proportion of fatigue-resistant stress absorbing layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114171132B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115304309A (en) * | 2022-06-22 | 2022-11-08 | 长沙理工大学 | Method for determining asphalt consumption of asphalt mixture based on mechanical property parameters |
| CN117345161A (en) * | 2023-11-30 | 2024-01-05 | 河北华运鸿业化工有限公司 | Self-adaptive compound determination method, system and actuator for emulsified asphalt plugging agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120253704A1 (en) * | 2011-03-29 | 2012-10-04 | University Of Tennessee Research Foundation | Method and apparatus for fatigue and viscoeleastic property testing of asphalt mixtures using a loaded wheel tester |
| CN103630450A (en) * | 2013-12-10 | 2014-03-12 | 云南云岭高速公路养护绿化工程有限公司 | Asphalt mixture life prediction method considering fatigue-creep interaction damage effect |
| CN110196197A (en) * | 2019-05-09 | 2019-09-03 | 长沙理工大学 | A kind of temperature dependency characterizing method of asphalt fatigue properties |
| CN113190962A (en) * | 2021-03-29 | 2021-07-30 | 大连海事大学 | Asphalt mixture fatigue life prediction method based on stable value of relative change rate of accumulated dissipation energy |
-
2021
- 2021-08-29 CN CN202110999660.5A patent/CN114171132B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120253704A1 (en) * | 2011-03-29 | 2012-10-04 | University Of Tennessee Research Foundation | Method and apparatus for fatigue and viscoeleastic property testing of asphalt mixtures using a loaded wheel tester |
| CN103630450A (en) * | 2013-12-10 | 2014-03-12 | 云南云岭高速公路养护绿化工程有限公司 | Asphalt mixture life prediction method considering fatigue-creep interaction damage effect |
| CN110196197A (en) * | 2019-05-09 | 2019-09-03 | 长沙理工大学 | A kind of temperature dependency characterizing method of asphalt fatigue properties |
| CN113190962A (en) * | 2021-03-29 | 2021-07-30 | 大连海事大学 | Asphalt mixture fatigue life prediction method based on stable value of relative change rate of accumulated dissipation energy |
Non-Patent Citations (2)
| Title |
|---|
| 王修山;郭林;汪俊杰;常晟;杨臻;: "基于复合改性沥青混合料耐久性研究", 低温建筑技术, no. 02, 28 February 2020 (2020-02-28) * |
| 贾朝霞;朱海波;李昶;: "沥青膜厚度法评价抗疲劳层沥青混合料油石比", 公路交通科技(应用技术版), no. 07, 15 July 2008 (2008-07-15) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115304309A (en) * | 2022-06-22 | 2022-11-08 | 长沙理工大学 | Method for determining asphalt consumption of asphalt mixture based on mechanical property parameters |
| CN117345161A (en) * | 2023-11-30 | 2024-01-05 | 河北华运鸿业化工有限公司 | Self-adaptive compound determination method, system and actuator for emulsified asphalt plugging agent |
| CN117345161B (en) * | 2023-11-30 | 2024-02-06 | 河北华运鸿业化工有限公司 | Self-adaptive compound determination method, system and actuator for emulsified asphalt plugging agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114171132B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114171132A (en) | Fatigue stress resistant absorbing layer mix proportion design method | |
| Chen et al. | Experimental study on fatigue properties of normal and rubberized self-compacting concrete under bending | |
| CN102503243B (en) | Method for determining mineral aggregate gradation by using three control points hyperbolic structure | |
| US20140245925A1 (en) | Mix composition determination method of coarse graded high modulus asphalt concrete with skeleton embedded structure | |
| CN102482498B (en) | Composition for improving the stability and operational performance and reducing the environmental impact of asphalt mixes | |
| CN110194612B (en) | Recycled asphalt concrete material capable of guaranteeing low-temperature performance and design method thereof | |
| CN103134712B (en) | Vertical vibrating forming method applicable to bituminous mixture test piece with aggregate nominal maximum particle size less than 26.5mm | |
| CN105893688B (en) | Performance-based drainage type asphalt stabilized macadam mix proportion design method | |
| CN111423156A (en) | Anti-rutting drainage ultrathin overlay asphalt mixture and preparation method thereof | |
| CN103122603B (en) | The method for designing of ATB-30 bituminous mixture | |
| CN1302904C (en) | Methods for gradating and inspecting coarse aggregate for asphalt concrete | |
| CN110255978B (en) | Method for determining mix proportion of assembled asphalt mixture based on performance requirements | |
| CN102680391A (en) | Method for judging bituminous mixture skeleton structure | |
| CN106554170A (en) | A kind of modified pitch gap gradation asphalt | |
| CN103334363B (en) | A kind of method for designing of ATB-25 bituminous mixture | |
| Zhao et al. | Design method and performance for large stone porous asphalt mixtures | |
| CN111122837B (en) | Road performance evaluation method for plant-mixed hot recycled asphalt mixture | |
| CN102305849A (en) | Method for evaluating structure type of bituminous mixture based on pavement core sample | |
| CN103162999B (en) | Vertical vibration thermoforming method suitable for bituminous mixture test piece with maximum particle size of aggregate indicated larger than or equal to 26.5mm | |
| CN115304309B (en) | Method for determining asphalt consumption of asphalt mixture based on mechanical property parameters | |
| CN103174075B (en) | The method for designing of AC-25 bituminous mixture | |
| CN110261248A (en) | A kind of Porous Elastic Road Surface asphalt mixture design optimization method | |
| CN102040354B (en) | Environment-friendly high-elastic asphalt mixture used as stress absorbing layer | |
| CN107572896B (en) | A kind of AC-20 modified asphalt mixture design method based on pavement performance | |
| Malkanthi et al. | Particle Packing Application for Improvement in the Properties of Compressed Stabilized Earth Blocks with Reduced Clay and Silt. |
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 |