Asphalt-Treated Base

Construction procedures for asphalt-treated base are identical to those for a conventional asphalt surface, and all applicable agency specifications should apply. For best results, the following should be applied:

• Asphalt-treated base works better when constructed to yield a smooth surface. If the surface is constructed to be rough, it may induce excessive friction, which may need to be mitigated prior to PCC placement.
• Prior to PCC placement, the surface of asphalt-treated base may be sprayed with water, water-lime solution, or concrete curing compound to reduce the surface temperature, which may reach 140 °F or higher. Alternatively, night-time paving maybe considered.
• Control of surface grade is also important for asphalt-treated base. The finished surface should be within ± ¼ inch of the design profile grade.