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concrete [2020/12/16 09:05]
rapidplatypus [Roman concrete]
concrete [2021/08/05 03:36] (current)
aga
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 ===== Roman concrete ===== ===== Roman concrete =====
-Modern concrete can break up within 50 years. However, Roman concrete structures last for thousands of years because they used volcanic ash, which slowly transforms into aluminum tobermorite.[(https://www.sciencemag.org/news/2017/07/why-modern-mortar-crumbles-roman-concrete-lasts-millennia)]+Modern concrete can break up within 50 years. However, Roman concrete structures last for thousands of years because they used volcanic ash, which slowly transforms into aluminum tobermorite. [([[https://www.sciencemag.org/news/2017/07/why-modern-mortar-crumbles-roman-concrete-lasts-millennia|Science Mag]])]
  
 ===== Highest building ===== ===== Highest building =====
-The World's tallest building, Burj Khalifa, is made of 330,000 m³ concrete reinforced with 55,000 tonnes of steel.+The world's tallest building, the Burj Khalifa, is made of 330,000 m³ of concrete reinforced with 55,000 tonnes of steel. [([[https://www.britannica.com/topic/Burj-Khalifa|Britannica]])]
  
 ===== Heaviest Concrete Structure ===== ===== Heaviest Concrete Structure =====
-Three Gorges Dam in Hubei, China, is the biggest and heavies concrete structure, build using 28,000,000 m³ of concrete and 463,000 tonnes of steel[(https://www.britannica.com/topic/Three-Gorges-Dam)]It'reservoir contains 39.3 km³ (9.43 cubic miles) of water, weighting more that 42,000,000,000 tonnes[(https://www.businessinsider.com/chinas-three-gorges-dam-really-will-slow-the-earths-rotation-2010-6?IR=T)].+Three Gorges Dam in Hubei, China, is the largest and heaviest concrete structure, build using 28,000,000 m³ of concrete and 463,000 tonnes of steel. Its reservoir contains 39.3 km³ (9.43 cubic miles) of water, weighing more than 42,000,000,000 tonnes[([[https://www.businessinsider.com/chinas-three-gorges-dam-really-will-slow-the-earths-rotation-2010-6?IR=T|Business Insider]])] 
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 +{{tag>construction science}}
concrete.1608131103.txt.gz · Last modified: 2020/12/16 09:05 by rapidplatypus