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  2. Aggregate industry in the United States - Wikipedia

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

    As of 2017, there were about 3600 companies mining sand and gravel, and 1400 thousand mining crushed rock in the United States, with many companies doing both. [3] [4] 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.

  3. Construction aggregate - Wikipedia

    en.wikipedia.org/wiki/Construction_aggregate

    In Europe, sizing ranges are specified as d/D, where the d shows the smallest and D shows the largest square mesh grating that the particles can pass. Application-specific preferred sizings are covered in European Standard EN 13043 for road construction, EN 13383 for larger armour stone, EN 12620 for concrete aggregate, EN 13242 for base layers of road construction, and EN 13450 for railway ...

  4. Fisher Industries - Wikipedia

    en.wikipedia.org/wiki/Fisher_Industries

    From 2002 to 2020, Fisher Sand & Gravel companies paid $697,000 in fines to the Environmental Protection Agency. [5] In 2009, Micheal Fisher, then-owner of Fisher, pled guilty to nine counts of felony tax fraud, [11] [12] [13] being sentenced to 37 months in prison and over $300,000 in restitution.

  5. Granite Construction - Wikipedia

    en.wikipedia.org/wiki/Granite_Construction

    Granite Construction works in both public and private sector transportation infrastructure projects that include: roads and highways, bridges, dams, water reservoirs, railroads, seaports, and airports. The materials division produces construction materials such as sand, gravel, ready-mix and asphalt concrete.

  6. Unified Soil Classification System - Wikipedia

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

    gravel > 50% of coarse fraction retained on No.4 (4.75 mm) sieve clean gravel <5% smaller than No.200 Sieve GW well-graded gravel, fine to coarse gravel GP poorly graded gravel gravel with >12% fines GM silty gravel GC clayey gravel sand ≥ 50% of coarse fraction passes No.4 (4.75 mm) sieve clean sand SW well-graded sand, fine to coarse sand SP

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  8. Gravel - Wikipedia

    en.wikipedia.org/wiki/Gravel

    Gravel is a major basic raw material in construction. [24] Sand is not usually distinguished from gravel in official statistics, but crushed stone is treated as a separate category. In 2020, sand and gravel together made up 23% of all industrial mineral production in the U.S., with a total value of about $12.6 billion.

  9. Gravel pit - Wikipedia

    en.wikipedia.org/wiki/Gravel_pit

    Gravel pits are a main source of aggregates such as gravel and sand, which are extracted then processed extensively to be suitable for various uses. [4] Aggregates are mined to make concrete, be crushed into construction aggregate, and for other industrial mineral uses.

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