Accurately Tracking Migration of Particles Based on Discrete-Element Simulation during Compaction ProcessSource: Journal of Materials in Civil Engineering:;2024:;Volume ( 036 ):;issue: 004::page 04024024-1DOI: 10.1061/JMCEE7.MTENG-16727Publisher: ASCE
Abstract: Aggregate particles migrate and rearrange their spatial positions during the compaction process. To analyze the migration law, an accurate method to track migration of particles is proposed using discrete-element simulation and experimental verification. First, the coarse aggregates were generated based on realistic aggregate shapes using a three-dimensional (3D) Blu-Ray scanner. Subsequently, the fine aggregates, ranging from 0.075 to 2.36 mm, and asphalt mastic were replaced with balls with a radius of 0.7 mm. Then the three-dimensional dynamic compaction models of asphalt mixture were established using the Superpave gyratory compaction method and Marshall impact compaction method. Next, the migration tracking test of particles was developed adopting particle marking, step-by-step compaction, and CT scanning. Finally, the accuracy and efficiency of the virtual models were validated using the experimental data from the migration tracking test. The results indicate that the established compaction models can accurately track the aggregates particles and measure the migration indexes. The compaction methods have a great influence on the migration behavior. The displacement of the particles for the Superpave gyratory compaction method is greater than that for the Marshall method, and the displacement is multidirectional, whereas the displacement of particles for the Marshall impact compaction method mainly are vertical.
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contributor author | Jinfei Su | |
contributor author | Peilong Li | |
contributor author | Shihao Dong | |
contributor author | Huifeng Su | |
date accessioned | 2024-04-27T22:58:47Z | |
date available | 2024-04-27T22:58:47Z | |
date issued | 2024/04/01 | |
identifier other | 10.1061-JMCEE7.MTENG-16727.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4297974 | |
description abstract | Aggregate particles migrate and rearrange their spatial positions during the compaction process. To analyze the migration law, an accurate method to track migration of particles is proposed using discrete-element simulation and experimental verification. First, the coarse aggregates were generated based on realistic aggregate shapes using a three-dimensional (3D) Blu-Ray scanner. Subsequently, the fine aggregates, ranging from 0.075 to 2.36 mm, and asphalt mastic were replaced with balls with a radius of 0.7 mm. Then the three-dimensional dynamic compaction models of asphalt mixture were established using the Superpave gyratory compaction method and Marshall impact compaction method. Next, the migration tracking test of particles was developed adopting particle marking, step-by-step compaction, and CT scanning. Finally, the accuracy and efficiency of the virtual models were validated using the experimental data from the migration tracking test. The results indicate that the established compaction models can accurately track the aggregates particles and measure the migration indexes. The compaction methods have a great influence on the migration behavior. The displacement of the particles for the Superpave gyratory compaction method is greater than that for the Marshall method, and the displacement is multidirectional, whereas the displacement of particles for the Marshall impact compaction method mainly are vertical. | |
publisher | ASCE | |
title | Accurately Tracking Migration of Particles Based on Discrete-Element Simulation during Compaction Process | |
type | Journal Article | |
journal volume | 36 | |
journal issue | 4 | |
journal title | Journal of Materials in Civil Engineering | |
identifier doi | 10.1061/JMCEE7.MTENG-16727 | |
journal fristpage | 04024024-1 | |
journal lastpage | 04024024-15 | |
page | 15 | |
tree | Journal of Materials in Civil Engineering:;2024:;Volume ( 036 ):;issue: 004 | |
contenttype | Fulltext |