LOW-TEMPERATURE CRACKING: TEST SELECTION

This report describes the thermal stress restrained specimen test (TSRST), which was selected to evaluate the low-temperature cracking resistance of asphalt concrete mixtures. The TSRST system includes a load frame, step-motor-driven load ram, data acquisition hardware and software, temperature controller, and specimen alignment stand. The overall system is controlled by a personal computer. TSRST is conducted by cooling an asphalt concrete specimen at a specified rate while maintaining the specimen at constant length. A typical thermally induced stress curve obtained in TSRST is divided into two parts: relaxation and nonrelaxation. The temperature at which the curve is divided into two parts is termed the transition temperature. The temperature at fracture is termed the fracture temperature, and the maximum stress is the fracture strength. An experiment design that considered a range of mixture and test condition variables was developed to evaluate the suitability of TSRST for characterizing low-temperature cracking resistance of asphalt concrete mixtures. Four asphalts and two aggregates were selected for the experiment. The mixture variables included asphalt type, aggregate type, and air voids content; the test condition variables included specimen size, stress relaxation, aging, and cooling rate.

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    • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Strategic Highway Research Program

    National Research Council, 2101 Constitution Avenue, NW
    Washington, DC  United States  20418
  • Authors:
    • Jung, D H
    • VINSON, T S
  • Publication Date: 1994-6

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 106 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00666005
  • Record Type: Publication
  • ISBN: 0309058074
  • Report/Paper Numbers: SHRP-A-400
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 13 1994 12:00AM