COMPARISON OF FUNDAMENTAL AND SIMULATIVE TEST METHODS FOR EVALUATING PERMANENT DEFORMATION OF HOT MIX ASPHALT

Rutting has long been a problem in hot mix asphalt (HMA) pavement. Through the years, researchers have used different kinds of fundamental and simulative test methods to estimate the rutting performance of HMA. It has been recognized that most fundamental tests are very complex while simulative tests are generally easy to perform. This paper documents a comparative study of two relatively fundamental tests, repeated shear at constant height (RSCH) and repeated load confined creep test (RLCC), and one simulative test, Asphalt Pavement Analyzer (APA) rut test. A comparison and correlation of various parameters (permanent deformation or strain, slopes and intercepts from linear or power law regressions) from these three tests results were conducted in this paper. The analysis data showed that the two fundamental tests had significant correlation with APA rut tests. The relationship between the deformation rates and the correlation between initial deformation from the RSCH and RLCC indicate the similar deformation behavior of HMAs under RSCH and APA loading conditions. Based upon the relationships observed in this paper and the existing guidelines for interpreting RSCH permanent shear strain and RLCC permanent strain, preliminary guidelines were recommended for evaluating rut resistance on the basis of APA rut depth. Compared with the existing APA criteria developed by the Georgia Department of Transportation, the acceptable rut depth criteria generated from this paper is reasonable and applicable.

• Record URL:
  • http://www.eng.auburn.edu/research/centers/ncat/files/reports/2002/rep02-07.pdf
• 
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/16075
• Corporate Authors:

  National Center for Asphalt Technology

  Auburn University, 277 Technology Parkway
  Auburn, AL  United States  36830
• Authors:
  • Zhang, Jianping
  • Cooley Jr, L A
  • Kandhal, P S
• Publication Date: 2002-10

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt pavements; Creep tests; Cyclic tests; Deformation; Depth; Hot mix asphalt; Mechanical strain; Pavement performance; Pavement ruts; Repeated loads; Rutting; Shear strain; Shear tests; Simulation; Test procedures
• Identifier Terms: Asphalt Pavement Analyzer
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00943807
• Record Type: Publication
• Report/Paper Numbers: NCAT Report No. 02-07
• Files: NTL, TRIS
• Created Date: Jun 3 2003 12:00AM