Discrete Element Analysis of SCB Variability—Asphalt Mixtures

Fracture of asphalt mixtures was modeled using a heterogeneous 2D-discrete element method simulating the semi-circular bending (SCB) test. The 2D internal structure was generated virtually utilizing 2D images of aggregate particles. The internal structure was produced to match specific mixes gradation, namely: superpave, porous friction course, and coarse matrix high binder mixes. The variability of SCB testing results was studied by producing 50 virtual cases for each of the mixes. In addition to randomly selecting the location of the aggregates within the internal structure, the location of air-voids was also random. The results indicated that the location of the aggregates and air-voids has a strong influence on the crack initiation, propagation and the crack path. Analysis of SCB fracture behavior for aggregates from different sources with different strength and shape properties indicated that the aggregate source plays a role in the variability, but none of the strength-shape combinations led to a significantly lower variability.

• Record URL:
  https://doi.org/10.1061/9780784480441.032
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784480441
• Supplemental Notes:
  • © 2017 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Renteria, David
  • Mahmoud, Enad M
  • Yanez, Rolando
  • Burbach, Victoria
• Conference:
  • Geotechnical Frontiers 2017
  • Location: Orlando Florida, United States
  • Date: 2017-3-12 to 2017-3-15
• Publication Date: 2017

Language

• English

Media Info

• Media Type: Web
• Monograph Title: Geotechnical Frontiers 2017: Transportation Facilities, Structures, and Site Investigation

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Bend tests; Binders; Cracking; Discrete element method; Heterogeneity; Simulation
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01686952
• Record Type: Publication
• ISBN: 9780784480441
• Files: TRIS, ASCE
• Created Date: Nov 26 2018 4:55PM