DYNAMIC MODULUS OF BITUMINOUS MIXTURES AS RELATED TO ASPHALT TYPE
The fundamental properties of asphaltic concrete are important to researchers as input to new design procedures being developed. The dynamic modulus of bituminous mixtures becomes a rational part of this new design procedure as a predictor of a pavement's performance in service. A review of current literature indicated that many researchers are active in determining fundamental properties of bituminous paving mixtures under a wide variety of conditions. The main objective of this study was to determine 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 incorporating the above mentioned variables. Material and sample preparation included a study on compaction procedures of four by eight inch high cylindrical specimens. A compaction technique was developed that yields uniform bulk density of the four by eight inch high specimen. A secondary objective of this study attempted to correlate a physical property of the asphalt cement to the dynamic modulus of the bituminous paving mixture. Such a correlation was established between the dynamic modulus and the slope of the log kinematic viscosity versus 1 degrees K plot, the cyclic loading rate, and the temperature of the test. This correlation may not be valid for mixtures using different aggregate types, graduations, and asphalt contents.
Purdue University/Indiana Department of Transportation JHRPPurdue University, School of Civil Engineering
West Lafayette, IN USA 47907-1284
- Yeager, L L
- Publication Date: 1973-12
- Features: Appendices; Figures; References; Tables;
- Pagination: 65 p.
- TRT Terms: Asphalt concrete; Bituminous mixtures; Compaction; Dynamic modulus of elasticity; Pavement performance; Repeated loads; Stresses; Temperature
- Subject Areas: Highways; Materials;
- Accession Number: 00261516
- Record Type: Publication
- Report/Paper Numbers: JHRP-27-73 Final Rpt.
- Files: TRIS
- Created Date: Nov 12 1974 12:00AM