Evaluation Indices of an Asphalt-Mixture Digital Specimen Based on the Discrete-Element Method

To evaluate the generation method of a digital asphalt-mixture specimen based on the discrete-element method, an algorithm for generating three-dimensional coarse aggregates is presented in this study. The simulation result shows that this algorithm can reflect the actual geometry (e.g., shape, size, fracture surface, and angularity) of aggregate particles. The digital three-dimensional specimen generated using this algorithm can model the three-phase system of coarse aggregates, air voids, and asphalt mastic for asphalt mixtures well. To estimate the distribution of coarse aggregates, both in the digital specimen and real asphalt mixture, the position and quantity of the coarse aggregates within a two-dimensional section of the asphalt mixture were adopted as evaluation indices. The results showed that the digital asphalt-mixture specimen was in good agreement with the real asphalt mixture, and the evaluation indices could be used to quantitatively analyze whether the digital specimen could reflect the real asphalt mixture. The proposed approach based on the discrete-element method can be used as a supplemental tool to evaluate the uniformity of asphalt mixtures for micromechanical analysis.

• Record URL:
  https://doi.org/10.1520/JTE20150152
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00903973
• Supplemental Notes:
  • © ASTM International 2015. All rights reserved. This material may not be reproduced or copied, in whole or part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of the publisher.
• Authors:
  • Liu, Weidong
  • Li, Liming
  • Tian, Bo
  • Liu, Fei
  • Cheng, Yongzhen
• Publication Date: 2016-3

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 812-819
• Serial:
  • Journal of Testing and Evaluation
  • Volume: 44
  • Issue Number: 2
  • Publisher: American Society for Testing and Materials (ASTM)
  • ISSN: 0090-3973
  • EISSN: 1945-7553
  • Serial URL: https://www.astm.org/DIGITAL_LIBRARY/JOURNALS/TESTEVAL/index.html

Subject/Index Terms

• TRT Terms: Air voids; Algorithms; Asphalt mixtures; Coarse aggregates; Discrete element method; Evaluation and assessment; Mastic asphalt; Specimens
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01600591
• Record Type: Publication
• Files: TRIS
• Created Date: May 26 2016 2:50PM