Optimization of Tack Coat Applications in Asphalt Pavements

摘要

Tack coat is a light application of asphalt-usually asphalt emulsion diluted with water-onto a relatively nonabsorptive pavement surface. The tack coat provides an adequate bond between the surface and the newly placed pavement (1). Bonding at the interface of pavement layers ensures that the layers behave as a single system in withstanding traffic and environmental stresses. Practitioners have favored emulsified tack coats instead of cutback asphalts because emulsified tack coats provide additional benefits, such as reduced energy consumption, fewer environmental impacts, and increased personnel safety.