Use of surface free energy properties of the asphalt-aggregate system to predict moisture damage potential Conference Paper uri icon

abstract

  • Moisture damage analysis based on surface free energy theory is presented in this paper. Two methods, the universal gas adsorption and the Wilhelmy plate, are used to measure surface free energies of aggregate and asphalt, respectively. The universal gas adsorption method utilizes the character of the adsorption of a particular chemical gas solvent onto the surface of an aggregate to indirectly determine the surface free energy of the aggregate. This method can accommodate the peculiarity of the irregular shape, size, mineralogy, and rough surface texture of the aggregate. The Wilhelmy plate method measures both the surface free energy of wetting and the surface free energy of dewetting from the advancing contact angles and receding contact angles, respectively. Calculation of surface free energy of adhesion using this approach can help select more compatible asphalt-aggregate combinations for asphalt mixtures. More compatible combinations can improve the adhesive bond and reduce debonding potential in the presence of moisture, stripping.

published proceedings

  • JOURNAL OF THE ASSOCIATION OF ASPHALT PAVING TECHNOLOGISTS, VOL 71

author list (cited authors)

  • Cheng, D. X., Little, D. N., Lytton, R. L., & Holste, J. C.

complete list of authors

  • Cheng, DX||Little, DN||Lytton, RL||Holste, JC

publication date

  • January 1, 2002 11:11 AM