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 Barite, Limonite, Magnetite, Hematite, Iron

   3- Aggregate Classification: Availability

    Natural Grave
          River or seashore gravels; desert, seashore and windblown sands
          Rounded in nature

    Crushed Aggregates.
          Crushed rocks of all types; talus; scree
          Angular in nature

   4- Aggregate Classification : Shape

    Fine aggregate : 6 standard sieves with openings from 150 μm to 4.75 mm. (150 μm,
    300 μm, 600 μm, 1.18mm, 2.36mm, 4.75mm)
    Coarse aggregate: 5 sieves with openings from 4.75mm to 80 mm. (4.75mm, 10mm,
    12.5mm, 20mm, 40mm)

Fineness Modulus (FM)

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