Asphalt

The University of Queensland pitch drop experiment, demonstrating the viscosity of asphalt/bitumen

Bituminous outcrop of the Puy de la Poix, Clermont-Ferrand, France

Asphalt (US /ˈæsfɔːlt/, UK /ˈæsfælt/, occasionally /ˈæʃfɔːlt/), also known as bitumen (US /bɪˈtjuːmən, baɪ-/, UK /ˈbɪtjᵿmən/) is a sticky, black and highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product; it is a substance classed as a pitch. Until the 20th century, the term asphaltum was also used. The word is derived from the Ancient Greek ἄσφαλτος ásphaltos.

单词	Asphalt emulsion
释义	Asphalt emulsion 英语百科 Asphalt Asphalt (US /ˈæsfɔːlt/, UK /ˈæsfælt/, occasionally /ˈæʃfɔːlt/), also known as bitumen (US /bɪˈtjuːmən, baɪ-/, UK /ˈbɪtjᵿmən/) is a sticky, black and highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product; it is a substance classed as a pitch. Until the 20th century, the term asphaltum was also used. The word is derived from the Ancient Greek ἄσφαλτος ásphaltos.
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Asphalt emulsion

Asphalt