The rehabilitation work had to be carried out speedily and economically, while minimising traffic disruption. To meet these requirements, contractor Fremix Engenharia e Comércio has been using a Wirtgen W200 cold milling machine that is fitted with a super-fine milling drum.
The World Cup finals started on 12th June 2014 with the first match, between Brazil and Croatia, taking place in the Arena de São Paulo, in the Itaquera district in the eastern part of the city. São Paulo city and road building contractors launched a major infrastructure programme to improve the roads in the area. 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 Araçoiaba da Serra meant that the road surface no longer featured the required skid resistance. Rehabilitation was necessary, but without removing the complete roadway, as the base course was still undamaged. The concessionnaire, Concessionária de Rodovias CCR via Oeste, enlisted the services of contractor Fremix Engenharia e Comércio Ltda. to rehabilitate a total area of roughly 154,000m² with a traffic lane width of 3.4m.
To meet the tight schedule without blocking the congested roads, Fremix opted 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.
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