ACQUIRING, ANALYZING, AND USING COMPLETE THREE-DIMENSIONAL AGGREGATE SHAPE INFORMATION

The shape of aggregates, from whatever source, plays a crucial role in determining the properties of the composite material in which they are embedded (e.g., asphaltic or portland cement concrete). To properly characterize this three-dimensional shape, three-dimensional information is needed. The authors show how this kind of information can be acquired via x-ray computed tomography. Mathematical "burning" algorithms can be applied to a multi-aggregate image to extract individual particles of various sizes. A spherical harmonic mathematical analysis can then be used to completely characterize the three-dimensional shape of each extracted aggregate. This real shape information can then be incorporated into algorithms for simulating the rheology of suspensions (fresh concrete or other materials) and into algorithms for simulating the structure of portland cement concrete.

• Supplemental Notes:
  • Full conference proceedings available on CD-ROM.
• Corporate Authors:

  University of Texas, Austin

  International Center for Aggregates Research, 3208 Red River
  Austin, TX  United States  78705-2650

  Texas A&M University, College Station

  Faculty Exchange Box H
  College Station, TX  United States  77843
• Authors:
  • Garboczi, E J
  • Martys, N S
  • Saleh, H H
  • Livingston, R A
• Conference:
  • International Center for Aggregates Research 9th Annual Symposium: Aggregates - Concrete, Bases and Fines
  • Location: Austin, Texas
  • Date: 2001-4-22 to 2001-4-25
• Publication Date: 2001

Language

• English

Media Info

• Features: Figures; References;
• Pagination: 13p

Subject/Index Terms

• TRT Terms: Aggregates by shape and surface texture; Algorithms; Asphalt; Mathematical analysis; Mathematical models; Portland cement concrete; Properties of materials; Rheology; Tomography; X rays
• Uncontrolled Terms: Spherical harmonics
• Subject Areas: Geotechnology; Highways; Materials; I36: Aggregates;

Filing Info

• Accession Number: 00983567
• Record Type: Publication
• Report/Paper Numbers: Final Draft
• Files: TRIS
• Created Date: Dec 24 2004 12:00AM