“Recycling milled asphalt is a production goal that Pavimental has pursued with success for some time now. To optimise the recycling process, we screen the material with a mesh size lower than 40. Thanks to the new mobile Centauro 100.32 system we can produce a granulometry of 0.08 for sand and 8-17 for fine aggregate, which is essential as the milled material must match the grading envelope of the new mixture with virgin materials.
The purchase of this new system was also important because we currently use about 10/15% of milled material derived from asphalt in our mixes, but as this material is widely available, we are currently assessing the possibility of creating mixes containing greater percentages. This machine offers long-term benefits because to obtain this size using conventional screening and crushing systems designed for general use the material has to be processed twice, resulting in reduced productivity with repercussions on the cost of the entire recycling process.
We were therefore searching for a solution that would make the process of preparing the material more fluid and efficient and the new mobile grinder has certainly helped us achieve that objective. When using a mixture of slabs and milled material, the system currently manages to process more than 110 t/hr, but in the first tests performed using only milled material the value reached was 180 tons/hour. This level of productivity in relation to performance and speed of assembly is achieved despite the compact size of the system; the Centauro can pass from processing material to transportation on a lorry in less than an hour. Other aspects that we have found of interest are greatly reduced consumption from the diesel motor and the low noise level.”
Alessandro Ciuffa and Fausto Mammanco from Pavimental - STRADE & AUTOSTRADE magazine, June 2012