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  2. Crushed stone - Wikipedia

    en.wikipedia.org/wiki/Crushed_stone

    20 mm (0.79 in) crushed stone, used for construction aggregate and landscape applications. Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers.

  3. Gravel - Wikipedia

    en.wikipedia.org/wiki/Gravel

    Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.

  4. 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 ...

  5. Tarmac scam - Wikipedia

    en.wikipedia.org/wiki/Tarmac_scam

    A conman typically goes door-to-door, claiming to be a builder working on a contract who has some leftover tarmac, and offering to pave a driveway at a low cost. [2] [6]The paving is in fact often simply gravel chippings covered with engine oil, [2] or not the right depth and type of materials to form a lasting road surface. [3]

  6. A pink powder is being used to fight California fires. It's ...

    www.aol.com/pink-powder-being-used-fight...

    The exact formula of Phos-Chek is not public knowledge but the company has said in previous filings that the product is 80% water, 14% fertiliser-type salts, 6% colouring agents and corrosion ...

  7. Stone damage - Wikipedia

    en.wikipedia.org/wiki/Stone_damage

    Stone damage, or stone-chip, is the damage that gravel and small stones can make to a vehicle. Stone damage is most common on roads on which the allowed speed exceeds 70 km/h (43 mph; 19 m/s), since stones stuck in the tires come loose at that speed and fly away with such a speed that they can damage other vehicles.