Cross-Functional Test to Explore the Determination Method of Meso-Parameters in the Discrete Element Model of Asphalt Mixtures
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Macro Dynamic Modulus Test
2.3. Aging of Specimen
2.4. Direct Tensile Test and Uniaxial Compression Test
2.5. Tensile Adhesion Test
2.6. Shear Bond Test
2.7. Nanoindentation Test
2.8. Discrete Element Model of Asphalt Mixtures
3. Meso-Parameters of the Discrete Element Model
3.1. Determination of Linear Contact Parameters
3.2. Determination of Burgers Model Parameters
3.3. Determination of Parallel Bonding Model Parameters
4. Model Accuracy Verification
4.1. Macro Tests of Asphalt Mixture
4.2. Simulation of the Asphalt Mixture Model in DEM
4.3. Comparison of the Macro Test and Simulation Results
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Sieve Size (mm) | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
Pass Percentages (%) | 100 | 91.2 | 63.6 | 26.9 | 21.1 | 18.3 | 15.6 | 13.7 | 11.8 | 10.1 |
Aging Conditions | Maxwell | Kelvin | ||
---|---|---|---|---|
E1 (MPa) | η1 (MPa·s) | E2 (MPa) | η2 (MPa·s) | |
Non-aging | 23.46 | 27.79 | 130.95 | 294.19 |
Aging-2d | 30.16 | 40.60 | 144.05 | 352.62 |
Aging-5d | 31.14 | 54.44 | 161.38 | 465.23 |
Aging-8d | 32.48 | 77.58 | 206.01 | 738.89 |
Aging Conditions | Direction | Maxwell | Kelvin | ||
---|---|---|---|---|---|
Non-aging | Normal | 46.92 | 261.90 | 55.58 | 388.38 |
Tangential | 18.77 | 104.76 | 22.23 | 155.35 | |
Aging-2 d | Normal | 60.32 | 288.1 | 81.2 | 705.24 |
Tangential | 24.13 | 115.24 | 32.48 | 282.10 | |
Aging-5 d | Normal | 62.28 | 322.76 | 108.88 | 930.46 |
Tangential | 24.91 | 129.10 | 43.552 | 372.18 | |
Aging-8 d | Normal | 64.96 | 412.02 | 155.16 | 1477.78 |
Tangential | 25.98 | 164.81 | 62.06 | 591.11 |
Modulus (GPa) | Aging Conditions | |||
---|---|---|---|---|
Non-Aging | Aging-2d | Aging-5d | Aging-8d | |
Tensile elastic modulus | 3.37 | 3.64 | 4.70 | 5.56 |
Compression elastic modulus | 28.84 | 29.97 | 34.64 | 39.24 |
Parameters | Aging Conditions | |||
---|---|---|---|---|
Non-Aging | Aging-2d | Aging-5d | Aging-8d | |
Pb_emod/1 × 109 (GPa) | 2.58 | 2.77 | 3.59 | 4.25 |
emod/1 × 109 (GPa) | 16.20 | 16.84 | 19.46 | 20.04 |
Strength (MPa) | Aging Conditions | |||
---|---|---|---|---|
Non-Aging | Aging-2d | Aging-5d | Aging-8d | |
tensile strength | 2.96 | 2.95 | 2.75 | 2.57 |
shear strength | 0.50 | 0.52 | 0.77 | 1.02 |
Dynamic Modulus (MPa) | Aging Conditions | |||
---|---|---|---|---|
Non-Aging | Aging-2d | Aging-5d | Aging-8d | |
25 Hz | 9350 | 9287 | 9441 | 9921 |
10 Hz | 7728 | 7723 | 8027 | 8232 |
5 Hz | 6479 | 6444 | 7321 | 7323 |
1 Hz | 3942 | 4011 | 4652 | 4681 |
Dynamic Modulus (MPa) | Aging Conditions | |||
---|---|---|---|---|
Non-Aging | Aging-2d | Aging-5d | Aging-8d | |
25 Hz | 8422.60 | 8693.33 | 8867.00 | 8987.46 |
10 Hz | 6336.18 | 7344.95 | 7413.56 | 7915.31 |
5 Hz | 5735.17 | 5870.63 | 6320.03 | 6551.87 |
1 Hz | 3039.14 | 3254.59 | 3434.79 | 4328.90 |
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Yi, X.; Chen, H.; Wang, H.; Tang, Z.; Yang, J.; Wang, H. Cross-Functional Test to Explore the Determination Method of Meso-Parameters in the Discrete Element Model of Asphalt Mixtures. Materials 2021, 14, 5786. https://doi.org/10.3390/ma14195786
Yi X, Chen H, Wang H, Tang Z, Yang J, Wang H. Cross-Functional Test to Explore the Determination Method of Meso-Parameters in the Discrete Element Model of Asphalt Mixtures. Materials. 2021; 14(19):5786. https://doi.org/10.3390/ma14195786
Chicago/Turabian StyleYi, Xingyu, Huimin Chen, Houzhi Wang, Zhiyun Tang, Jun Yang, and Haopeng Wang. 2021. "Cross-Functional Test to Explore the Determination Method of Meso-Parameters in the Discrete Element Model of Asphalt Mixtures" Materials 14, no. 19: 5786. https://doi.org/10.3390/ma14195786