Construction World June 2017

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

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:

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

alone, the specialist for compaction technology

has delivered more than 3 000 machines with this

innovative technology.