The resilient, or elastic, characteristics of asphalt material were studied in the laboratory using the repeated-load indirect tensile test to demonstrate its use and to obtain information on the elastic properties. Previous work has indicated that this test is economical and easy to conduct by an operating agency such as a highway department (as opposed to a research agency). The primary objectives of the study were: To demonostrate the use of the repeated-load indirect tensile test for the study of the elastic and permanent deformation characteristics of asphalt mixtures, To determine the effect of selected factors on the resilient characteristics, and To investigate the effects of repeated tensile stresses on the resilient characteristics. The factors investigated were the aggregate type, asphalt content, testing temperature, and stress level. Within the limits of load, temperature, and mixture variables considered in this study, it was concluded that: The repeated-load indirect tensile test can be used to estimate the resilient characteristics of asphalt materials; The relations between the instantaneous resilient modulus, the total resilient modulus, or the modulus of individual total deformation and the number of stress applications can be divided into three zones. The effects of stress level and asphalt content on the average instantaneous and total resilient moduli are uncertain; however, there was an increase in these moduli with decreasing testing temperature; Poisson's ratio increased with increasing stress applications; and The service life of a laboratory specimen subjected to indirect tensile fatigue loading was estimated to be between 70 and 80 percent of its fracture (fatigue) life.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 85-88
  • Monograph Title: Soil mechanics: rutting in asphalt pavements, embankments on varved clays and foundations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00163006
  • Record Type: Publication
  • ISBN: 0309025958
  • Files: TRIS, TRB
  • Created Date: Oct 13 1977 12:00AM