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ISSN Печать: 1093-3611
ISSN Онлайн: 1940-4360
Indexed in
PLASMA PROCESSING OF CONCRETE AND RELATED MATERIALS
Краткое описание
The large number of ways to mix and use concrete and its reinforcement with steel is in contrast to the number of technologies for the destruction of old construction substances. Especially for buildings or constructions, made of heavy concrete with a high degree on steel-reinforcement (i.e. nuclear reactors, bunkers, industrial smoke stacks), the number of usable and affordable technologies is very small. Different from known technologies an additional/alternative method and technology was developed, which uses a DC-Plasma torch with non-transferred arc. As a first step of a project a special designed DC-plasma torch with a power of approx. 40 kW was used. To reduce the costs, the torch was runned with nitrogen only or mixtures of mainly nitrogen with a small amount of argon. The generated thermal plasma with its high kinetic energy was able to melt and cut any construction material, independent from the presence and degree of steel reinforcements up to large depths and with a high velocity. In various tests the destruction of steel-reinforced concrete plates up to a thickness of 200 mm was successfully demonstrated by continuous cutting or defined hole drilling. In the latter case the samples were finally deconstructed to small blocks by thermally induced cracks between the holes. Another tested application is the decorative treatment of surfaces of natural stones (i.e. Granite) or the selective separation of such materials by thermally induced cracks.
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Corbella Carles, Portal Sabine, Keidar Michael, Arc plasma ablation of quartz crystals, Plasma Research Express, 3, 2, 2021. Crossref