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10.3390/ma14195786
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Article

Cross-Functional Test to Explore the Determination Method of Meso-Parameters in the Discrete Element Model of Asphalt Mixtures

by
Xingyu Yi
1,
Huimin Chen
1,
Houzhi Wang
1,
Zhiyun Tang
1,
Jun Yang
1,* and
Haopeng Wang
2
1
School of Transportation, Southeast University, Nanjing 210096, China
2
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
*
Author to whom correspondence should be addressed.
Materials 2021, 14(19), 5786; https://doi.org/10.3390/ma14195786
Submission received: 17 August 2021 / Revised: 14 September 2021 / Accepted: 26 September 2021 / Published: 3 October 2021
(This article belongs to the Special Issue Advances in Asphalt Materials)
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Abstract

In order to obtain more accurate parameters required for the simulation of asphalt mixtures in the discrete element method (DEM), this study carried out a series of cross-functional asphalt mixture experiments to obtain the DEM simulation meso-parameters. By comparing the results of simulation and actual experiments, a method to obtain the meso-parameters of the DEM simulation was proposed. In this method, the numerical aggregate profile was obtained by X-ray CT scanning and the 3D aggregate model was reconstructed in MIMICS. The linear contact parameters of the aggregate and the Burgers model parameters of the asphalt mastic were obtained by nanoindentation technology. The parameters of the parallel bonding model between the aggregate and mastic were determined by the macroscopic tensile adhesion test and shear bond test. The results showed that the meso-parameters obtained by the macroscopic experiment provide a basis for the calibration of DEM parameters to a certain extent. The trends in simulation results are similar to the macro test results. Therefore, the newly proposed method is feasible.
Keywords: asphalt mixture; discrete element method (DEM); nanoindentation tests; meso-parameters; dynamic modulus asphalt mixture; discrete element method (DEM); nanoindentation tests; meso-parameters; dynamic modulus

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MDPI and ACS Style

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

AMA Style

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 Style

Yi, 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

APA Style

Yi, X., Chen, H., Wang, H., Tang, Z., Yang, J., & Wang, H. (2021). Cross-Functional Test to Explore the Determination Method of Meso-Parameters in the Discrete Element Model of Asphalt Mixtures. Materials, 14(19), 5786. https://doi.org/10.3390/ma14195786

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