What term describes the technique of leveling the surface of HMA before it cools?

• A. Finishing
• B. Smoothing
• C. Sealing
• D. Compacting

Answer: (B)

The technique of leveling the surface of Hot Mix Asphalt (HMA) before it cools is referred to as smoothing. This process involves using tools and methods to achieve an even, flat surface that facilitates proper water drainage and enhances the overall quality of the pavement. Smoothing is crucial in the initial stages after the asphalt is laid and helps to eliminate imperfections or inconsistencies that could affect the performance of the pavement in the long run. Proper smoothing ensures that the surface texture meets specific standards for rideability and durability.

In the context of the other options, finishing generally refers to the last touches or processes applied to the pavement surface, which may include but is not limited to the initial smoothing. Sealing typically involves applying a protective layer or coating over a finished surface, and compacting is the process used to increase the density of the asphalt, enhancing its strength and stability. While all these processes are important in asphalt paving, smoothing specifically addresses the leveling of the surface before the material cools and sets.