Why must heaters be equipped on the screed?

Heaters must be equipped on the screed primarily to prevent the asphalt mix from sticking to the screed plate. When hot mix asphalt is applied, it is crucial that it adheres properly to the road surface without clinging to the equipment itself. The addition of heaters helps maintain the temperature of the screed, ensuring that the asphalt remains workable and fluid. This is important for achieving a smooth and uniform finish during the paving process and avoiding any interruptions caused by material adhesion.

While the other options may refer to relevant aspects of screed function or operation, preventing the mix from sticking is central to ensuring a smooth paving operation and maintaining the integrity of the surface being laid.