What is the required temperature for the tack coat RC-250?

The required temperature for the tack coat RC-250 being between 55-100°C is correct because it falls within the optimal range for this type of material. Tack coats are essential in ensuring a strong bond between layers of asphalt, and achieving the appropriate temperature is crucial for ensuring that the adhesive properties of the RC-250 are activated effectively. At temperatures within this range, the viscosity of the tack coat is ideal, allowing it to spread evenly and bond properly to the surface beneath it.

Maintaining temperatures outside this range could lead to issues such as inadequate bonding if it's too cool or burning and degradation of the material if it's too hot, which would compromise its effectiveness. Thus, executing the tack coat application at the specified 55-100°C ensures optimal performance and longevity of the asphalt layers being adhered.