RECOMMENDED PROCEDURE FOR DETERMINING THE DYNAMIC MODULUS OF ASPHALT MIXTURES

The fundamental properties of asphaltic concrete are important to researchers as input to new design procedures. The dynamic modulus of bituminous mixtures is a rational part of this new design procedure as a predictor of in-service pavement performance. Much research is under way to determine the fundamental properties of bituminous paving mixtures under a wide variety of conditions. The objective of this study was to select a method for evaluating the dynamic modulus of an Indiana state highway surface mixture. The main variables used in this study were stress level, cyclic loading rate, temperature, and asphalt type. A final procedure was developed that incorporates these varialbes. Material and sample preparation included a study on compaction procedures of 4 by i-in.-high (102 by 203-mm) cylindrical specimens. A compaction technique was developed that yeilds uniform bulk density of the specimen. Another objective of the study was to correlate a physical property of the asphalt cement to the dynamic modulus. Such a correlation was established between the dynamic modulus and the slope of log kinematic viscosity versus 1/temperature, the cyclic loading rate, and temperature. This correlation may not be valid for mixtures of different aggregate types, gradation, and asphalt contents.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 26-38
  • Monograph Title: Bituminous mixtures, aggregates, and pavements
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129484
  • Record Type: Publication
  • ISBN: 0309024544
  • Files: TRIS, TRB
  • Created Date: Mar 10 1976 12:00AM