Which product should the prime coat consist of according to Saudi Aramco standards?

The prime coat according to Saudi Aramco standards should consist of MC-250. This grade of cutback asphalt is specifically suited for the prime coating process because it provides effective bonding with the base material, ensuring proper adhesion and stability. MC-250 typically has a moderate viscosity and drying time, which allows it to penetrate well into the surface it’s applied to, promoting strong adhesion between layers. The balance of properties in MC-250 makes it ideal for improving the durability of the pavement system, preventing moisture intrusion, and providing a reliable foundation for subsequent layers.

Other grades, while they may have their own usage contexts, do not align with the specific requirements set by Saudi Aramco for prime coats, which focus on achieving optimal performance and longevity of the pavement structure.