PRECISION STATISTICS FOR FREQUENCY SWEEP AT CONSTANT HEIGHT TEST

The objective of this research project was to find the "best" Superpave Shear Test (SST) protocol. Researchers performed a comparative analysis of results from SST and other laboratory-scale rutting tests and recommended frequency sweep at constant height (FSCH) as the "best" SST protocol for predicting rutting of hot mix asphalt (HMA) mixtures. In order to prepare a precision statement for the FSCH, researchers developed and administered an interlaboratory study conducted at the four regional Superpave Centers, Asphalt Institute, and Federal Highway Administration. Three different hot mix asphalt mixtures were tested using the FSCH test at two different temperatures and 10 different frequencies following standard test procedure AASHTO TP7-01 at each of the six participating laboratories. Before testing, all of the specimens were prepared at the Texas Transportation Institute. The results were analyzed using both the graphical technique suggested by W.J. Youden and ASTM E 691-99 "Standard Practice for Conducting an Interlaboratory Study." The precision values obtained for the different test parameters were poor due to the high variability of this test procedure.

• Record URL:
  • https://library.ctr.utexas.edu/hostedpdfs/tti/0-1819-2.pdf
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/84746
• Supplemental Notes:
  • Project Title: Evaluation of Shear Strength Property of HMAC for Predicting Performance.
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, Information Technology Exchange Center
  College Station, TX  United States  77843

  Texas Department of Transportation

  Research and Technology Implementation Office, P.O. Box 5080
  Austin, TX  United States  78763-5080

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Chowdhury, A
  • Button, J W
• Publication Date: 2003-11

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: 42 p.

Subject/Index Terms

• TRT Terms: Hot mix asphalt; Laboratory tests; Precision; Rutting; Shear strength; Shear tests; Superpave
• Uncontrolled Terms: Frequency sweep at constant height; Interlaboratory studies
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00987756
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-04/0-1819-2,, Technical Report 0-1819-2
• Contract Numbers: Project 0-1809
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Mar 24 2005 12:00AM