Mexico City recycles asphalt to cut pollution, costs

They used to throw it out, but now the Mexico City government is recycling the asphalt and pavement material it removes from roads, to produce a cheaper, less polluting and more abundant "asphalt mix" to repave and repair city roads. The head of the recycling plant making the material in the district of Coyoacán, Mariano Plascencia, said the mix produced 90 per cent less dust and pollutants, without elaborating, Milenio newspaper reported on 22 July. It consisted of a mix of crushed stones, cement and "additives," merged in temperatures of 120-151 degrees celsius. The plant had most recently produced 57,900 tonnes of the asphalt mix, which the city government distributed between the capital's delegaciones, the larger city sectors or districts, to meet their stated needs. The use of the new asphalt was made obligatory in 2010. The new material was described as requiring little maintenance, which produced a further "40 per cent savings," the daily cited city authorities as saying.