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  2. Hydrophobic sand - Wikipedia

    en.wikipedia.org/wiki/Hydrophobic_sand

    Hydrophobic sand (or magic sand) is a toy made from sand coated with a hydrophobic compound. The presence of the hydrophobic compound causes the grains of sand to adhere to one another and form cylinders (to minimize surface area) when exposed to water, and form a pocket of air around the sand. [1] The pocket of air makes magic sand unable to ...

  3. Sandpit - Wikipedia

    en.wikipedia.org/wiki/Sandpit

    Children play in a communal sandbox Sandpit with toy tools used by children to play in sand. A sandpit (most Commonwealth countries) or sandbox (US and Canada) is a low, wide container or shallow depression filled with soft (beach) sand in which children can play. Sharp sand (as used in the building industry) is not suitable for such use.

  4. Molding sand - Wikipedia

    en.wikipedia.org/wiki/Molding_sand

    The history of molding sand is difficult to study, as much of the origins of the practice predate writing. Molding sand was used exclusively for bronze casts, which was pioneered by the ancient Chinese. The next major advancement came in India in 500 B.C. when cast-crucible steel was created.

  5. Sand - Wikipedia

    en.wikipedia.org/wiki/Sand

    Glass: Sand rich in silica is the principal component in common glasses. Hydraulic fracturing: A drilling technique for natural gas, which uses rounded silica sand as a "proppant", a material to hold open cracks that are caused by the hydraulic fracturing process. Landscaping: Sand makes small hills and slopes (golf courses would be an example).

  6. Sand casting - Wikipedia

    en.wikipedia.org/wiki/Sand_casting

    Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand—known as casting sand—as the mold material. The term "sand casting" can also refer to an object produced via the sand casting process. Sand castings are produced in specialized factories called foundries. In 2003, over 60% of all metal ...

  7. Sand mining - Wikipedia

    en.wikipedia.org/wiki/Sand_mining

    Frac sand facility in Blair, Wisconsin Frac sand mine in the Town of Oakdale, Wisconsin with a large looped track with 3 rail lines. Silica sand mining business has more than doubled since 2009 because of the need for this particular type of sand, which is used in a process known as hydraulic fracturing. Wisconsin is one of the five states that ...

  8. Ironsand - Wikipedia

    en.wikipedia.org/wiki/Ironsand

    Ironsand, also known as iron-sand or iron sand, is a type of sand with heavy concentrations of iron. It is typically dark grey or blackish in color. It is typically dark grey or blackish in color. It is composed mainly of magnetite , Fe 3 O 4 , and also contains small amounts of titanium, silica, manganese, calcium and vanadium.

  9. Permeability (foundry sand) - Wikipedia

    en.wikipedia.org/wiki/Permeability_(foundry_sand)

    Permeability is a property of foundry sand with respect to how well the sand can vent, i.e. how well gases pass through the sand. And in other words, permeability is the property by which we can know the ability of material to transmit fluid/gases.

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