Wirtgen cold milling machine W 200 rehabilitates roads for the World Cup in Brazil. The FIFA World Cup 2014 has already begun in Brazil on June 12, 2014. Against this backdrop, the stadium´s timely completion has been a highly popular subject of speculation.
The challenge The international fans do not seem to have spared much thought for whether transport conditions and the state of the roads will let them arrive at the stadium in time to watch the matches. Ensuring that this is indeed the case, is a key task at all the Brazilian locations.
Spo Paulo city and road building contractors have launched a major infrastructure programme specifically for this purpose. The Raposo Tavares (SP-270) motorway connecting the federal state of Mato Grosso du Sul with Sao Paulo was one of those in need of repair.
Varying degrees of damage to the surface course at several points between Sorocaba and Aratoiaba da Serra meant that the road surface no longer displayed the required skid resistance. Rehabilitation was necessary,
but without removing the complete roadway, as the base course was still undamaged. The concessionnaire, Concessionßria de Rodovias CCR via Oeste, enlisted the services of contractor Fremix Engenharia e ComTrcio. to rehabilitate a total area of roughly 154,000 sq m with a traffic lane width of 3.40 m.
The solution: super-fine milling with Wirtgen W 200 Which was the best way to adhere to the tight schedule without blocking the congested roads more than what was absolutely necessary? For Fremix, the answer was to use a super-fine milling drum. This modified version of the standard cold milling method produces a level skid-resistant surface in just one pass. Further steps, such as paving a new surface course, are normally not necessary. Alternatively, a thin surface course can be paved at a later date.
Fremix Engenharia e ComTrcio. placed its entire trust in the tried-and tested technologies of the Wirtgen Group. Valmir Bonfim, Site Manager for Fremix, decided to use a Wirtgen cold milling machine W 200 with FCS super-fine milling drum LA 6x2 for the job.
ôWith the super-fine milling drum we can groove the pavement at intervals of 6 mm and to a depth of between 2 to 20 mm,´ explains JosT Marques Pereira, the man in charge of Fremix´s road milling team.
Additional features Greater cost-efficiency with FCS: The ´Flexible Cutter System´ or FCS for short allows the milling drum to be changed quickly and easily. The milling drums on these cold milling machines can be accessed from the side and are simple to remove. It is lowered onto a drum carriage for easy withdrawal from the housing.
Quick tool changes allow the owner to use the machine for a variety of jobs. Several FCS drums with different working widths and tool spacings are available for the W 200. A drum change takes no more than two hours and the cold milling machine is transformed from a standard machine to a super-fine milling machine. The FCS greatly increases flexibility, creating a host of new potential uses and considerably boosting the machine´s cost-efficiency.
Easy levelling: LEVEL PRO supplies information on the levelling process and allows the operator to control the milling depth without leaving his platform. Intuitive, ergonomically designed operation with user-friendly graphic displays and function keys are hallmarks of the system.
A controller analyses the data from various plug-in sensors, controls the machine´s height adjustment and transmits the corresponding data to the control console.
WIDRIVE: The interaction between key components diesel engine, travel drive, milling drum drive and belt drive, water spray system and height adjustment is centrally managed by Wirtgen´s intelligent WIDRIVE machine control system. In this way, WIDRIVE automates many functions, which would normally be performed manually by the operator, thus permitting fuel-saving, environment-friendly milling operations.
PTS - always parallel to the surface: The proprietary PTS system developed by Wirtgen guarantees precise adherence to the set working depth while relieving the operator to the greatest possible extent. PTS stands for ´parallel to surface´ and automatically ensures that the machine is dynamically aligned parallel to the road surface.
PTS also includes an automatic backup function for resuming at the required milling depth. In this way, machine operation is greatly simplified while maintaining the high levelling quality.
ISC (Intelligent Speed Control): Intelligent speed control ISC comprises three basic functions: Electronic traction control Automatic adjustment of the speed of individual crawler tracks in bends Optimised rate of advance Traction control by the ISC minimises the extent to which individual crawler tracks slip in tough conditions and guarantees optimum traction. What´s more, ISC electronically adjusts the speed of the inner and outer crawler tracks in bends, thus reducing wear on the crawler shoes. ISC also adjusts the machine´s advance rate to optimise utilisation of the engine power.
(Communication by the management of the company)