Three of Wirtgen's W 210 Fi machines demonstrated their capabilities during the rehabilitation of the A31 motorway in Italy, which connects the A4 Milan-Venice motorway with the Alps. The task on a 1.4 km section in the Italian province of Vicenza was to mill the pavement off to a depth of 22 cm near the Thiene exit.
The lower base course was then stabilised with cement by a Wirtgen WR 250 recycler and soil stabiliser over an area of roughly 15 000 m² and subsequently compacted by Hamm rollers.
Vögele pavers then laid the asphalt. To separate the milled material according to the types of mix, the large milling machines first removed the surface course to a depth of 4 cm, and then milled the 18 cm-thick asphalt binder course and asphalt base course in a second pass. This allowed systematic reintroduction of the separate layers into the material cycle.
The cold milling machines drove in staggered formation to continuously “feed” a rapid succession of 45 dump trucks with milled material.
The W 210 Fi’s two-speed powershift transmission combined with the diesel engine helped extend the range of milling drum speeds, both upwards and downwards. This helped to support reductions in fuel consumption and cutting tool wear in the low milling drum speed range. A high quality milling pattern could also be achieved in the upper milling drum speed range, even when working with a high area output, making the W 210 Fi suitable for the demanding milling job.
Read the article online at: https://www.drybulkmagazine.com/product-news/11122019/wirtgen-milling-machine-helps-improve-efficiency/