The first tests in autumn 2004 immediately convinced the engineers. Impressed by the effectiveness of the compactors, they decided to purchase two machines with a working weight of 12 tonnes. Since then, they have compacted around 7400 cubic metres of sand day after day. The rolling pattern stipulates six passes, with one pass including one ascent and one descent.
Quality doubled, emissions halved
Civil engineer and project leader Eduardo Araos is impressed by the compaction quality. With the bulldozer, compaction was very irregular, particularly on steeper surfaces. HAMM technology provides the perfect solution to this problem. Samples and tests repeatedly confirm that the wall displays the required density and strength all the way across. But those responsible at Con-Pax are also highly satisfied because the rollers from Germany are extremely environmentally friendly and simultaneously reduce their operating costs. With their extremely low fuel consumption, each of the two Hammtronic compactors has replaced two machines with "thirsty" engines. In addition, the compactors can also compact when driving backwards, in contrast to a bulldozer with a trailer-type roller. Therefore, fewer passes are required. Overall, these effects have led to CO2 emissions being halved in one fell swoop.
The compactors have now been working continuously on this project for three years. With 5000 operating hours per machine per year, they can achieve incredibly high uptime here. Three points are decisive for this. Firstly, the solid and precise processing offered by HAMM rollers. Secondly, regular maintenance and inspection by operator Con-Pax. And thirdly, outstanding support in terms of expertise and spare parts from Alejandro Saballa, service manager at Salinas y Fabres, the Chilean HAMM distributor based in Santiago de Chile.