During the Autostrada 2006 International Fairs, a competition in which Slag Recycling received an award for its “Aggregates for road dehydration systems and hydrotechnical applications” was adjudicated. The organisers of the competition emphasised, in particular, the filtration properties of Slag Recycling”s aggregates that make them ideal for removing excess water. This feature has a large influence on the durability of constructed roads.