ブックタイトル「近代の文化遺産の保存理念と修復理念」英語版

概要

「近代の文化遺産の保存理念と修復理念」英語版

14and then for conservation and preservation.Volklingen lies in the south west of Germany(Photo 4). With the Duisburg-Meiderich plantand the Volklingen plant, the preservationof these large sites became quite popular.Volklingen was inscribed as a World HeritageSite in 1994.And we got a second site in the Ruhr Area:Hattingen blast furnace is not a public park,but a museum site contrary to what we did inDuisburg-Meiderich (Photo 5). It was veryimportant especially for conservation andrestoration policies because here first attemptswere tried out to keep such a large structure fora longer period. The framework around the blastfurnace looks relatively new, it was sandblastedand coated in 1995.　Some basic work was done here also inPhoto 6　Gap corrosion seen in a steel structurePhoto 5　Hattingen blast furnacePhoto 4　Volklingen plantgaining experience for corrosion protection.The steel shaft of a dismantled blast furnaceis still standing. Test fields on this shaft wereprepared in 1990 with different coatingsprotecting against corrosion. I will not go intodetails about the different lacquers, colours andoils used or tried out, but after 25 years we havea good record of how to use and choose thebest of these coatings.Steel structures seem to be very difficult tomaintain. Our main problem already mentionedis rust. The corrosion experts say: rust neversleeps. They also say corrosion is given by godand you cannot stop it, you can only work withit. In our experience we can say now that earlysteel structures are not so difficult to maintainbecause we can use the concept of continuousrepair already developed and used in theindustry.The largest problems are the compositestructures, steel members made out ofconnected profiles, either riveted, screwed orwelded. So called gap-corrosion will developbetween the component parts producing rustwhich drives these parts to seperate, breakingrivets or joints (Photo 6). You cannot solve thisproblem with small interventions, and heavier