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Wirtgen Group South Africa has introduced its HP Series, a totally new generation of pneumatic tyre rollers from its HAMM brand. Key talking points on the new range include the technically advanced operator station, the innovative water and additive sprinkler system as well as the flexible ballasting system.
The first units of the Hamm HP Series have arrived in southern Africa. Waylon Kukard, sales manager at Wirtgen Group South Africa, says the company has already sold the first HP 240 to Zimbabwe, testimony to the high interest in the new range. The first HP 180 and HP280 units are available in stock.
The new HP Series replaces the tried and tested GRW range, which was first launched in the 1960s. Some 50 years later, HAMM is launching a new generation of pneumatic tyre rollers, comprising the HP 180 with operating weights of 8 t to a maximum of 18 t; the HP 240 with operating weights of 8,5 t to a maximum of 24 t; and the HP 280 with operating weights between 10 t and 28 t.
One of the key talking points on the new series is the operator platform, which comes with first-class field of vision. As is customary with HAMM, the new HP series pneumatic tyre rollers offer a modern, spacious operator platform or panoramic cabin with maximum visibility over the machine and the construction site. In this respect all models comply with the new ISO 5006-2017 operator’s field of view standard which is markedly stricter than the previous provisions. In terms of machine design, HAMM is sticking with the proven asymmetrical frame concept in the HP series. This is not only a hallmark, it is also a quality advantage because it follows the track offset between the front and rear wheel sets and always allows a clear view of the outer flanks of the front and rear wheels.
Another key innovation is the flexible ballasting which comes as standard. With this feature, the operating weight is quickly adjustable to suit the asphalt type, layer thickness and application. Here, the HP series offers considerable latitude with its variable ballasting concept. For example, prefabricated ballast bodies made of steel or normal or heavyweight concrete can be inserted into or removed from the large ballast compartments between the wheel sets using a forklift truck, for example. This can be carried out in the user’s workshop or on the construction site. HAMM offers various ballast body kits for this purpose, allowing different weights to be achieved. Because the ballast spaces are located in the centre of the machine, the weight is always evenly distributed over both axles – perfect conditions for optimum compaction quality. Additional ballasting of up to 17 t is possible, depending on the basic weight.
HAMM has also optimised the additive sprinkler system for the new HP series due to the profusion of special asphalts that tend to be difficult to process. High-quality compaction of these construction materials calls for sprinkling of the pneumatic tyres with an additive. “Previously, the additive concentrate was mixed with water and then filled into a separate tank on the roller. On the new machines, the additive concentrate is simply filled without premixing. The dosage from the large additive tank with level monitoring can be controlled from the operator platform in various addition levels. The roller doses and mixes the additive during the compaction in accordance with the specification. This also brings about an increase in quality because HAMM avoids separation of the additive-water mixture by virtue of the design. And last but not least, swapping from water to additive can easily be done at any time directly from the operator platform,” explains Kukard.
State of market
Commenting on the state of the market, Kukard says there seems to be a bit more optimism in the construction industry compared to the last couple of years. The road construction industry, he says, will be crucial to the economic turnaround of South Africa.
“To resuscitate the economy from the current COVID-19 influenced downturn, the government has prioritised infrastructure projects. We, however, feel that we are still a couple of months away from experiencing this turnaround but the optimistic feeling in the market is a welcome change from the difficult years we have faced. As Wirtgen Group South Africa, we are well positioned to support our valued customers in line with our ‘Close to our Customers’ motto,” concludes Kukard.