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  2. Crushed stone - Wikipedia

    en.wikipedia.org/wiki/Crushed_stone

    Substitutes for crushed stone used as construction aggregates include sand and gravel, iron and steel slag, sintered or expanded clay or shale, and perlite or vermiculite. [7] A crushed stone barge in China Crushed stone laid as a road base. Crushed stone is a high-volume, low-value commodity. The industry is highly competitive and is ...

  3. Construction aggregate - Wikipedia

    en.wikipedia.org/wiki/Construction_aggregate

    The great majority of crushed stone is moved by heavy truck from the quarry/plant to the first point of sale or use. According to the USGS , 2006 U.S. sand and gravel production was 1.32 billion tonnes valued at $8.54 billion (compared to 1.27 billion tonnes valued at $7.46 billion in 2005), of which 264 million tonnes valued at $1.92 billion ...

  4. Gravel - Wikipedia

    en.wikipedia.org/wiki/Gravel

    Crushed stone may be made from granite, limestone, dolomite, and other rocks. Also known as "crusher run", DGA (dense grade aggregate) QP (quarry process), and shoulder stone. [30] Crushed stone is distinguished from gravel by the U.S. Geological Survey. [25] Fine gravel gravel consisting of particles with a diameter of 2 to 6.3 millimetres (0. ...

  5. Decomposed granite - Wikipedia

    en.wikipedia.org/wiki/Decomposed_granite

    Decomposed granite, as a crushed stone form, is used as a pavement building material. It is used on driveways, garden walkways, bocce courts and pétanque terrains, and urban, regional, and national park walkways and heavy-use paths. DG can be installed and compacted to meet handicapped accessibility specifications and criteria, such as the ADA ...

  6. Aggregate industry in the United States - Wikipedia

    en.wikipedia.org/wiki/Aggregate_industry_in_the...

    As of 2023, there were about 3400 companies mining sand and gravel, [1] and 1400 mining crushed rock in the United States, [2] with many companies doing both. Top crushed rock companies as of 2015, in order of descending tonnage. The top ten companies provided 45 percent of the crushed rock produced in the US. [5] Rank Company 1. Martin ...

  7. Unified Soil Classification System - Wikipedia

    en.wikipedia.org/wiki/Unified_Soil...

    Cu < 4 and/or Cc < 1 or Cc > 3 GP Poorly graded gravel Gravels with Fines. More than 12% fines Fines classify as ML or MH GM Silty Gravel Fines classify as CL or CH GC Clayey gravel Sands. 50% or more of coarse fraction passes No.4 sieve Clean Sands. Less than 5% fines Cu ≥ 6 and 1 ≤ Cc ≤ 3 SW Well-graded sand Cu < 6 and/or Cc < 1 or Cc ...

  8. Base course - Wikipedia

    en.wikipedia.org/wiki/Base_course

    [1] [2] Aggregate base (AB) is typically a mix of different sizes of crushed rock 20 mm or 3 ⁄ 4 in Aggregate Base, Class 2, is used in roadways and consists of rock particles of size 20 mm (3 ⁄ 4 in) and less. An aggregate is normally made from newly quarried rock, or it is sometimes allowed to be made from recycled asphalt concrete and/or ...

  9. Gravel road - Wikipedia

    en.wikipedia.org/wiki/Gravel_road

    The gravel used consists of varying amount of crushed stone, sand, and fines. Fines are silt or clay particles smaller than .075 millimetres (0.0030 in), which can act as a binder. Crushed stone, also called road metal, is used because gravel with fractured faces will stay in place better than rounded river pebbles.

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