Aggregate effect on asphalt mixture properties by modeling particle-to-particle interaction

Zhanping You, William G. Buttlar, Qingli Dai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A number of researchers have studied aggregate characteristics including elongation, flatness, and other shapes that are believed to affect asphalt mixture properties such as internal resistance, rutting resistance, tensile strength, and complex modulus etc. However, the aggregate modulus also affects the asphalt mixture modulus significantly, which has not been taken into consideration. In this paper, the effect of aggregate particle-to-particle interaction was studied through numerical modeling using the discrete element modeling (DEM) approach. The individual material phases (e.g., aggregates and mastic) were modeled with clusters of discrete elements based upon laboratory testing of the individual phases. For a given set of material parameters for each phase, the degree of particle-to-particle contact in an asphalt mixture was found to have a profound influence on overall mixture modulus. A parametric investigation of aggregate modulus revealed that the contribution of aggregate modulus to overall mixture modulus was very significant. Pending further experimental verification on asphalt mixtures, this finding may shed new light on the importance of aggregate stiffness on overall mixture properties. Copyright ASCE 2007.

Original languageEnglish (US)
Title of host publicationAnalysis of Asphalt Pavement Materials and Systems
Subtitle of host publicationEmerging Methods
Pages14-21
Number of pages8
Edition176
DOIs
StatePublished - Dec 1 2007
EventSymposium on Mechanics of Flexible Pavements at the 15th U.S. National Congress of Theoretical and Applied Mechanics - Boulder, CO, United States
Duration: Jun 25 2006Jun 30 2006

Publication series

NameGeotechnical Special Publication
Number176
ISSN (Print)0895-0563

Other

OtherSymposium on Mechanics of Flexible Pavements at the 15th U.S. National Congress of Theoretical and Applied Mechanics
CountryUnited States
CityBoulder, CO
Period6/25/066/30/06

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ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

Cite this

You, Z., Buttlar, W. G., & Dai, Q. (2007). Aggregate effect on asphalt mixture properties by modeling particle-to-particle interaction. In Analysis of Asphalt Pavement Materials and Systems: Emerging Methods (176 ed., pp. 14-21). (Geotechnical Special Publication; No. 176). https://doi.org/10.1061/40924(308)2