\¦as-¦fólt also ¦ash-, esp British -¦falt\ [ME aspalt, fr. LL asphaltus, fr. Gk asphaltos] (14c) (bitumen) n. (1) A dark brown or black, bituminous, viscous material which gradually liquefies when heated. The predominating constituents are bitumens, all of which occur in the solid or semisolid form in nature or are obtained by refining petroleum, or which are combinations of the bitumens mentioned with each other or with petroleum or derivatives thereof. (2) A similar material obtained artificially in refining petroleum; used in built-up roofing systems as a water-proofing agent. (3) A mixture of such substances with an aggregate for use in paving.
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Usmani AM (1997) Asphalt science and technology. Marcel Dekker, New York.
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(2006). Asphalt. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-0-387-30160-0_815
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