18/08/2016
Prime Coat - Spraying of liquid bituminous binder of low viscosity over a granular or non bituminous surface is called application of prime coat or priming. This is an important part of preparations before laying a bituminous layer over a granular base course.
The objectives of priming are:
1. Pe*****te deep into the surface and plug or seal the voids on the surface.
2. Coat and bond the loose particles on the surface.
3. Render the surface of the base course water resistant.
4. Permit the tack coat to be applied over the primed surface to provide proper adhesion between the base and the bituminous pavement layer constructed above the treated granular base.
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Spraying of liquid bituminous binder of low viscosity over a granular or non bituminous surface is called application of prime coat or priming. This is an im...