Test Specifications for SPST and HWTT

This document is divided into two major parts: Part A and B. Part A documents some proposed modifications to the Hamburg wheel-tracking test (HWTT) and Tex 242-F test procedure, whereas Part B documents the proposed tentative specification and test procedures for the simple punching shear test (SPST). For Part A (HWTT specification), the major modification is in Section 6.5 where the procedure to handle mixtures at higher HWTT test temperatures is described. TxDOT Project 5-6744-01 found most hot mix asphalt (HMA) mixtures fail rapidly when subjected to higher HWTT temperatures (60°C). Nevertheless, those that survive require a closer look onto the response rutting plots and determination if adjustments are needed as explained in Section 6.5. Part B is a tentative proposed draft specification for SPST testing. The major output of this SPST protocol are HMA shear strength, shear strain, shear modulus, shear strain energy, and shear strain energy index. Of all these SPST parameters, only shear strength and shear strain energy index were found to have a good correlation with field rutting and HWTT testing (1, 2, 3).

• Record URL:
  http://tti.tamu.edu/documents/5-6744-01-P1.pdf
• Summary URL:
  https://library.ctr.utexas.edu/Presto/catalogid=36765
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/59098
• Corporate Authors:

  Texas A&M Transportation Institute

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135

  Texas Department of Transportation

  Research and Technology Implementation Office
  125 E 11th Street
  Austin, TX  United States  78701-2483

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Walubita, Lubinda F
  • Nyamuhokya, Tito
  • Lee, Sang Ick
• Publication Date: 2019-2

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 30p

Subject/Index Terms

• TRT Terms: Flexible pavements; Hot mix asphalt; Mix design; Rutting; Shear strain; Shear strength; Shear tests; Specifications; Test procedures
• Identifier Terms: Hamburg Wheel Tracking Device
• Subject Areas: Construction; Design; Highways; Pavements;

Filing Info

• Accession Number: 01695977
• Record Type: Publication
• Report/Paper Numbers: 5-6744-01-P1
• Contract Numbers: 5-6744-01
• Files: NTL, TRIS, ATRI, USDOT, STATEDOT
• Created Date: Feb 25 2019 11:46AM