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In civil engineering, concrete leveling is a procedure that attempts to correct an uneven concrete surface by altering the foundation that the surface sits upon. It is a cheaper alternative to having replacement concrete poured and is commonly performed at small businesses and private homes as well as at factories, warehouses, airports and on roads, highways and other infrastructure.
Prior to the completion of the Marmaray and HZMB tunnels, the Transbay Tube in San Francisco Bay, completed in 1969, was the world's deepest and longest immersed tube, at 41 metres (135 ft) below water level and 5.8 kilometres (3.6 mi) long.
Twenty-one electric winches were installed on Ford Island, anchored in concrete foundations. They operated in unison. They operated in unison. Each winch pulled about 20 short tons (18 metric tons) by a wire operated through a block system which gave an advantage of seventeen, for a total pull of 21×20×17, or 7,140 short tons (6,480 metric tons).
Self-leveling concrete was invented in 1952 by Axel Karlsson from Sweden. The first product was a combination of wood glue, fine sand and cement with additives. [1] It was called flytspackel, which directly translates to "floating putty". The term self-leveling can be traced back to a patent applied by the company Lafarge in 1997. [2]
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The formation level subsoil may still not be suitable for excavation or bearing capacity. The water in the caisson (due to a high water table) balances the upthrust forces of the soft soils underneath. If dewatered, the base may "pipe" or "boil", [clarification needed] causing the caisson to sink. To combat this problem, piles may be driven ...
A new emotional video has come out showing the 53-man crew of the sunken Indonesian submarine KRI Nanggala 402 singing aboard their ship.
A concrete float is a tool used to finish a concrete surface by making it smooth. A float is used after the surface has been made level using a screed . In addition to removing surface imperfections, floating will compact the concrete as preparation for further steps.
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