Construction World June 2017

ROADS AND BRIDGES

World leader in OSCILLATION COMPACTION Over 30 years ago, HAMM became the first roller manufacturer to offer an oscillation drum for tandem rollers, and these rollers have become an integral part of its product offering. In the past five years

sensitive areas – such as near hospitals, city centers, rail tracks, or industrial plants – possible for the first time. Compaction at every phase Another bonus is that oscillation rollers can start dynamic compaction directly behind the paver (breakdown phase). They can then also deal with the main compaction (intermediate phase). And even with lower asphalt temperatures at the end of compaction (finish phase), oscillation ensures an increase in compaction without crushing the aggregate. Overall, when using oscillation rollers, the time available for compaction is significantly greater than with vibratory rollers. Experience shows When building oscillation drums, HAMM – unlike its competitors, which have all entered the market with this technology in recent years only – can draw on decades of experience. And it is precisely this experience that makes the difference, as Richard Evans, vice president, HAMM, explains: “You can copy technical solutions, but you can’t copy experience.” Comprehensive portfolio The HAMM portfolio encompasses tandem rollers for asphalt paving ranging from 2,5 t to 15 t. When it comes to the pivot-steered rollers in the DV+ series, a popular choice for demanding road building projects, the share of oscillation rollers is particularly high:

Today, one in four of the tandem rollers made by HAMM is equipped with an oscillation drum. With more than 30 models to choose from, HAMM has by far the widest offering of oscillation rollers in the world. And only HAMM builds oscillation tandem rollers in the compact class, as well as soil compactors with oscillation compaction capability. Fast, cost-effective high-quality The reason for this success is simple: oscillation rollers make for fast, cost-effective and high-quality dynamic compaction. In particular, tandem rollers with one oscillation drum and one vibrating drum achieve at least the same degree of compaction as double vibrating drum rollers, but with fewer passes. Another benefit is the extremely low vibration provided by oscillation, making dynamic compaction on bridge overlays, of thin layers, and in alone, the specialist for compaction technology has delivered more than 3 000 machines with this innovative technology.

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CONSTRUCTION WORLD JUNE 2017