Influence of Grain Shape and Surface Texture on the Deformation Properties of Unbound Aggregates in Pavements

The aim of this study is to investigate the influence of grain shape, angularity, and surface texture, determined through 3-D image analysis, on the deformation properties of unbound granular materials. By using a coarse, single-sized material, the effect of grain shape is expected to be more pronounced and discernible. The resilient modulus and permanent deformation characteristics of the different aggregate samples are determined from repeated load triaxial testing and are linked to aggregate morphology by the use of imaging-based shape indices. The results show that the cubical aggregates were easier to compact when compared to the flaky aggregates. The cubical rounded aggregates gave the highest resilient moduli when tested at high stress levels. For the cubical aggregates, the angularity and surface texture seemed to have a significant effect on both the elastic and plastic shakedown threshold limits.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/16762797
• Authors:
  • Uthus, L
  • Tutumluer, Erol
  • Horvli, I
  • Hoff, Inge
• Publication Date: 2007-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 75-87
• Serial:
  • International Journal of Pavements
  • Volume: 6
  • Issue Number: 1
  • Publisher: University of Mississippi, University
  • ISSN: 1676-2797

Subject/Index Terms

• TRT Terms: Aggregates by gradation; Aggregates by shape and surface texture; Deformation; Grain shape (Geology); Pavement components; Triaxial shear tests
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01126307
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 2009 2:58PM