Which of the following is NOT a type of roller used for pavement?

A drum roller is indeed a type of roller used for pavement. It typically consists of a large cylindrical drum that compacts asphalt or soil through its weight and sometimes utilizes vibration to aid in the compaction process.

The other types of rollers mentioned serve specific purposes in pavement construction. Steel-wheeled rollers are known for providing a smooth finish and are often used for asphalt compaction. Pneumatic-tired rollers use tires filled with air, which helps in providing uniform pressure across the surface, making them effective for compacting various materials. Vibratory rollers employ a vibrating mechanism that enhances the compaction process by breaking down air voids in the material being compacted.

Thus, identifying drum roller as the incorrect choice highlights a misunderstanding of the various equipment used in pavement construction. All options, aside from the one incorrectly chosen, represent valid types of rollers utilized in asphalt and soil compaction.