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| COWI first in Scandinavia to use new supermaterial for tunnels Denmark is to have its first bored tunnel using steel fibre reinforced concrete elements instead of the traditional steel bar reinforcement. The steel fibre reinforced concrete will be used as liner in a district heating tunnel intended to last 100 years. For this product is a mixture of concrete and steel fibres, and soon it is to be put to the test as building material in a 4 km long district heating tunnel 4.8 metres in diameter deep underground beneath central Copenhagen. This is the first time in Denmark that a bored tunnel is to be built using steel fibre reinforced elements. Concrete elements with steel reinforcement would normally be used for bored tunnels, but there are numerous benefits to using steel fibres measuring no more than 47 mm in length and 0.8 mm in diameter. COWI AS, which is designing and supervising the tunnel construction for Copenhagen Energy, is the first consultant in Scandinavia to use the steel fibre reinforced tunnel elements. They have only been used twice before: in a test section of a tunnel in the Netherlands in 1998 and in a tunnel project in England in 2002-2003. write your comments about the article :: © 2006 Construction News :: home page |