PREDICTING TENNESSEE PAVEMENT FRICTIONAL PERFORMANCE WITH COARSE AGGREGATE TESTS

In 1992, the Tennessee Department of Transportation (TDOT) initiated a project to pair aggregate performance with pavement functional needs so that all Tennessee aggregate sources could be used more efficiently. The principal result of the project was a new preevaluation procedure for aggregate polish resistance called the Tennessee Terminal Textural Condition Method (T3CM). The T3CM uses an up-scaled version of the AASHTO T 304 device to monitor an aggregate's ability to retain angularity and texture through a simulated aging process. In the fourth phase of the study, currently underway, 23 coarse aggregates, sampled at the cold feed stockpile, are being subjected to T3CM, T3CM with sand aging, X-ray diffraction, British Pendulum, Loss-on-Ignition, and chemical percent silica techniques. Preliminary results indicate that the correlation between T3CM and skid performance (R2 = 0.74) is far superior to the correlations between ASTM C 25 percent silica (R2 = 0.38), percent silica by X-ray diffraction (R2 = 0.36), Loss-on-Ignition (R2 = 0.28), aggregate absorption (R2 = 0.14), and BPN 9 (R2 = 0.0004) with skid performance.

• 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:
  • Crouch, L K
  • Sauter, H J
  • Ding, M
  • Duncan, G M
  • Leimer, H W
  • Goodwin, W 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; Tables;
• Pagination: 16p

Subject/Index Terms

• TRT Terms: Angularity; Coarse aggregates; Friction; Pavement performance; Skid resistance; Tests; Texture
• Uncontrolled Terms: Polish resistance
• Geographic Terms: Tennessee
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I36: Aggregates;

Filing Info

• Accession Number: 00983559
• Record Type: Publication
• Report/Paper Numbers: Final Draft
• Files: TRIS
• Created Date: Dec 23 2004 12:00AM