With 70 days to go to the inaugural Grand Prix in Russia, the Sochi Autodrom has applied the final layer of the racing surface to the new circuit.Crews of 50 workers operating 15 specialized machines have been working around the clock, laying the asphalt with help from German track architects Tilke GmbH and other subcontractors to reach this milestone for the new circuit.The final composition of the three layers used to complete the racing surface, from top to bottom, is as follows:4 cm asphalt wearing course, modified for racing circuits5 cm binder course and asphalt base courseThe final makeup of the asphalt contains special polymer material that ensures the surface texture of the track...
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