ISSN: 1546-962X
Published Online: 28 February 2005
Page Count: 14

C-φ Characterization Model for Design of Asphalt Mixtures and Asphalt Pavements

Fwa, TF
Professor and Associate Professor, National University of Singapore,

Tan, SA
Professor and Associate Professor, National University of Singapore,

(Received 28 November 2003; accepted 23 November 2004)

Abstract

This paper reports the results of a research effort initiated in the early 1990s to develop a C-φ (cohesion-angle of friction) characterization model for the design of asphalt mixtures and asphalt pavements. It is demonstrated that, since the model is based on the fundamental material properties represented by C and φ, it can derive analytically other asphalt mix design parameters such as Marshall stability and flow, and indirect tensile strength. The C-φ characterization model therefore offers a useful basis for the development of a comprehensive design framework that integrates asphalt mix design with asphalt pavement structural design. To demonstrate this capability, the research developed an empirical-mechanistic rutting prediction model of asphalt pavement layer using the C-φ characterization model. In addition, the model allows stresses and strains under design loading to be computed, which can be applied as input to structural analysis for asphalt material selection and pavement thickness design.

Keywords:
triaxial test, asphalt mixtures, mix design, cohesion, friction angle, elastic modulus, pavement design, rutting prediction

Paper ID: JAI12262
DOI: 10.1520/JAI12262
ASTM International is a member of CrossRef.