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Robotic Hydrodemolition in Folkestone, UK. Hydrodemolition of concrete exposing the rebar.. Hydrodemolition (also known as hydro demolition, hydroblasting, hydro blasting, hydromilling, waterblasting, and waterjetting) is a concrete removal technique which utilizes high-pressure water, often containing an abrasive material, to remove deteriorated and sound concrete as well as asphalt and grout.
Broken Down Dam (formerly the Fergus Falls Hydro Dam [1] or Fergus Falls City Light Station [2]) was a concrete hydroelectric gravity dam on the Otter Tail River in Otter Tail County, Minnesota in the United States. Constructed in 1908 to supply power to the nearby town of Fergus Falls, the dam suddenly failed on September 24, 1909. Collapse of ...
Demolition of the cooling towers of a power station, Athlone, Cape Town, South Africa, 2010. Building demolition and natural disasters such as earthquakes often release a large amount of concrete dust into the local atmosphere. Concrete dust was concluded to be the major source of dangerous air pollution following the Great Hanshin earthquake. [5]
Example of flat piece of concrete having dislodged with corroded rebar underneath, Welland River bridge across Queen Elizabeth Way in Niagara Falls, Ontario. The expansion of the corrosion products (iron oxides) of carbon steel reinforcement structures may induce internal mechanical stress (tensile stress) that cause the formation of cracks and disrupt the concrete structure.
C&D Materials, construction and demolition materials, are materials used in and harvested from new building and civil engineer structures. [3] Much building waste is made up of materials such as bricks, concrete and wood damaged or unused during construction.
There are several ways dams can be removed and the chosen method will depend on many factors. The size and type of the dam, the amount of sediment behind the dam, the aquatic environment below the dam, who owns the dam and what their priorities are, and the timeframe of dam removal are all factors that affect how the dam will be removed. [9]
It is used in demolition jobs which involve breaking large blocks of concrete or rocks. Its use in geology was first popularized by volcanologist David Richardson. Following the darda splitters, the second type hydraulic splitter, known as piston splitter began to be used in large rock demolition sites like tunneling sites or building ...
Concrete may be considered waste according to the European Commission decision of 2014/955/EU for the List of Waste under the codes: 17 (construction and demolition wastes, including excavated soil from contaminated sites) 01 (concrete, bricks, tiles and ceramics), 01 (concrete), and 17.01.06* (mixtures of, separate fractions of concrete ...