Abstract
A major asphalt pavement distresses is the moisture damage which influences the viscoelastic properties. In the present work, Roller compacted slab samples of asphalt concrete were prepared at optimum binder content. Beam specimens were obtained from the slab samples and subjected to moisture damage. Part of the beam specimens were then tested under dynamic flexural stresses, while another part of the beams was subjected to micro cracks healing process using external heating at 60° C for 120 minutes, then tested under the dynamic flexural stresses. The viscoelastic properties of asphalt concrete in terms of permanent deformation, flexural stiffness, phase angle, and cumulative dissipated energy were monitored and compared. A significant increase in the flexural stiffness, phase angle, and cumulative dissipated energy after healing is observed. It was concluded that healing process does not exhibit positive influence on permanent deformation of moisture damaged asphalt concrete
Published Version
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