A total of three of Wirtgen’s W 210 Fi large milling machines demonstrated the added value of their technological innovations during rehabilitation of the A 31 motorway, which connects the A 4 Milan-Venice motorway with the Alps. The task on a 1.4-km section in the 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 stabilized with cement by a Wirtgen WR 250 recycler and soil stabilizer 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.
Thanks to the new two-speed powershift transmission, which is automatically controlled by Mill Assist, a much larger range of milling drum speeds is now also available. The diesel engine also features a modern engine rating with a high torque starting at 1,300 rpm. This lowers diesel consumption and noise emissions.
The intelligent control of the two-speed powershift transmission combined with the diesel engine extends the range of milling drum speeds, both upwards and downwards. This supports significant reductions in fuel consumption and cutting tool wear in the low milling drum speed range. A high-quality milling pattern can be achieved in the upper milling drum speed range, even when working with a high area output. This makes the W 210 Fi professional machine ideal for particularly demanding milling jobs.
To learn more, visit Wirtgen Group's website.