Description
One of the more used and traded commodities in the world is asphalt and related varieties of asphalt. Going all the way back in time to the tar pits used by the Athabasca Indians in Canada to seal their canoes, the asphalt under different names and appearances has wide use in infrastructure and industrial applications. The typical examples are with paving of roads and driveways where the asphalt after mixing with aggregate in a hot-mix plant provides a weather and wear resist surface. It is also widely used in construction products, like roof shingles and tar paper, to water proofing and sealing compounds.
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