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  2. Bitumen - Wikipedia

    en.wikipedia.org/wiki/Bitumen

    By the end of 2006, the cost had doubled to approximately $320 per ton, and then it almost doubled again in 2012 to approximately $610 per ton." [ 21 ] The report indicates that an "average" 1-mile (1.6-kilometer)-long, four-lane highway would include "300 tons of asphalt," which, "in 2002 would have cost around $48,000.

  3. Road surface - Wikipedia

    en.wikipedia.org/wiki/Road_surface

    An asphalt concrete surface will generally be constructed for high-volume primary highways having an average annual daily traffic load greater than 1,200 vehicles per day. [19] Advantages of asphalt roadways include relatively low noise, relatively low cost compared with other paving methods, and perceived ease of repair.

  4. Sibanthracite Group - Wikipedia

    en.wikipedia.org/wiki/Sibanthracite_Group

    The companies specialize in open-pit coal mining. In 2019, the production volume of Sibanthracite Group amounted to 23.7 million tons, of which UHG anthracite - 14.1 million tons, T grade coal (PCI) - 9.6 million tons. 98% of anthracite and 70% of metallurgical coal are exported, mainly to the Asian-Pacific Region. [4]

  5. History of anthracite coal mining in Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/History_of_anthracite_coal...

    Prior to the Civil War, the industry involved many small-scale mines with short-term leases resulting in increasing production levels but an overall trend of falling prices. In 1830, anthracite coal was selling for $11 per ton, in 1840 it was $7 per ton, and by 1860 it was $5.50 a ton in NYC, while total production was increasing. [20]

  6. Anthracite - Wikipedia

    en.wikipedia.org/wiki/Anthracite

    Current U.S. anthracite production averages around five million tons per year. Of that, about 1.8 million tons were mined in the state of Pennsylvania. [24] Mining of anthracite coal continues to this day in eastern Pennsylvania, and contributes up to 1% to the gross state product. More than 2,000 people were employed in the mining of ...

  7. Asphalt concrete - Wikipedia

    en.wikipedia.org/wiki/Asphalt_concrete

    Asphalt batch mix plant A machine laying asphalt concrete, fed from a dump truck. Asphalt concrete (commonly called asphalt, [1] blacktop, or pavement in North America, and tarmac or bitumen macadam in the United Kingdom and the Republic of Ireland) is a composite material commonly used to surface roads, parking lots, airports, and the core of embankment dams. [2]

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