Testing Procedures for Long Life Heavy Duty Stabilized Bases

Fatigue cracking is one of the major types of distresses observed in pavement structures due to repeated traffic loads. The new mechanistic pavement design protocols, such as TxME, require modulus of rupture of the materials as input to the fatigue performance models. This report discusses the practical and theoretical issues associated with traditional third point bending beam fatigue test and provides an alternative method for the determination of the tensile strength of the stabilized materials in the laboratory. To achieve the objective of the project, a full factorial laboratory experiment design consisted of four aggregates sources with distinct lithology, four stabilizer contents, and two conditioning/curing procedures were incorporated in the experiment matrix. The stabilized systems were subjected to unconfined compressive strength test, submaximal test at different strength ratios, static and dynamic indirect tension tests, free-free resonant column tests and dielectric tests, to better understand the mechanical behavior of materials in the laboratory. Moisture susceptibility tests were also incorporated in the study to monitor the degradation of the material properties with moisture intrusion in stabilized systems. A multi-dimensional aggregate feature database was developed based on 570 fabricated laboratory specimens in this research. The trend analysis of the laboratory data revealed the capability of the new laboratory procedure to provide an efficient and repeatable measure of the tensile strength of stabilized materials subjected to high number of load cycles in the laboratory.

• Record URL:
  https://library.ctr.utexas.edu/hostedpdfs/utep/0-6812-1.pdf
• Record URL:
  https://library.ctr.utexas.edu/Presto/catalogid=37881
• Summary URL:
  https://library.ctr.utexas.edu/Presto/catalogid=37882
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/56227
• Supplemental Notes:
  • Report date July 2016; published June 2020.
• Corporate Authors:

  University of Texas, El Paso

  Center for Transportation Infrastructure Systems
  500 W University Avenue
  El Paso, TX  United States  79968-0516

  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:
  • Ashtiani, Reza
  • Tarin, Jose
• Publication Date: 2020-6

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; Maps; Photos; References; Tables;
• Pagination: 139p

Subject/Index Terms

• TRT Terms: Aggregates; Base course (Pavements); Compressive strength; Fatigue cracking; Fatigue tests; Laboratory tests; Mechanistic-empirical pavement design; Modulus of rupture; Moisture content; Stabilized materials; Tensile strength; Test procedures
• Subject Areas: Design; Highways; Pavements;

Filing Info

• Accession Number: 01747133
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-20/0-6812-1, 0-6812-1
• Contract Numbers: 0-6812
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Jul 30 2020 3:49PM