![]() ![]() Until the mid-1950s concrete was the dominating material and many companies were involved in the big projects in the Norwegian mountains (fig.1).įigure 1: The Zakarias dam (completed 1969). In Norway concrete has been used as the main material in dams built for producing electricity. 1 Two hundred years ago, an industrial product named Portland cement was introduced overtaking the market from the natural pozzolans. The volcano ashes used in concrete were called pozzolans after the city Pozzuoli, close to Naples and Vesuvius, where the material was first collected. Draugen german how to#It was however the Romans, a little more than 2000 years ago, who really developed the knowledge and competence of how to create huge buildings based on using ashes from volcanoes as an important ingredient. The first traces of a material that can have some resemblance to concrete dates back 20 000 years. Back to top Concrete platforms for the North Sea The time of the fossil fuels may be obsolete within this century, the petroleum industry has been the basis for the development of modern Norway and the concrete structures are unique pieces of design and construction. The most important structures are the huge Condeeps (abbreviated from Concrete Platform for Deep Waters). Having spent more than 30 years in the Norwegian oil industry I have seen most of the technical progress that has been taking place. One platform - in my mind - Draugen, could be a strong candidate for becoming an international monument and possibly gain status as a UNESCO world heritage status. Realizing what a great influence the oil industry has had for the development of economic and social life in Norway there have been several ideas how to preserve at least one of these structures for the future – when the fossil fuel era comes to an end. When Norway became an oil producing country towards the end of the 1960s, only a few people expected that a Norwegian entrepreneur company could become one of the largest subcontractors to the upcoming exploration of the North Sea – using concrete as a material in exceptional and giant structures. ![]() Preserving one of the dinosaurs of the North Sea: why and how. ![]()
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