A new tunnel formwork system from Pilosio reduces the time needed for assembly. Made from standard components, this can be used for a wide range of geometries.
Concrete highway construction techniques and technology continues to evolve. Mike Woof reports The recent increases in oil costs are having a knock-on effect for the road construction sector, as asphalt prices have increased noticeably and faster than those for concrete. This has spurred renewed discussion over which construction technique now offers the best long term solution for road building. The debate between those in favour of concrete and those preferring asphalt for highway construction has been on
Increases in mobility and loads to which roadways are subjected has led, over the past decade, to new technologies for increasing the life of highly stressed pavements. Alongside traditional layers in asphalt concrete with normal or modified binders, there are new technologies which make it possible to produce high performance bituminous layers through the use of polyfunctional polymeric systems (PPSs).
Congestion is particularly bad on the road from the city centre to Juan Álvarez international airport. Jams are frequent on the section of road between Acapulco Bay and the Diamante and Puerto Marques suburbs, which currently means climbing La Escénica. To tackle the problem the city authorities decided to build the new tunnel and bypass the traffic jams. The route of the 3.2km tunnel runs under the Cumbres de Llano Largo mountain. The contract for excavating the two tunnels was awarded to the Aca-Túnel con
