the alpha privative, and σφάλλειν ( sphallein), "to cause to fall, baffle, (in passive) err, (in passive) be balked of". The word "asphalt" is derived from the late Middle English, in turn from French asphalte, based on Late Latin asphalton, asphaltum, which is the latinisation of the Greek ἄσφαλτος ( ásphaltos, ásphalton), a word meaning "asphalt/bitumen/ pitch", which perhaps derives from ἀ-, "not, without", i.e. 5.7 Radioactive waste encapsulation matrix.
Its other main uses are for bituminous waterproofing products, including production of roofing felt and for sealing flat roofs.
The primary use (70%) of asphalt is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete. The largest natural deposit of asphalt in the world, estimated to contain 10 million tons, is the Pitch Lake located in La Brea in southwest Trinidad ( Antilles island located on the northeastern coast of Venezuela), within the Siparia Regional Corporation. The word is derived from the Ancient Greek ἄσφαλτος ásphaltos. Before the 20th century, the term asphaltum was also used. It may be found in natural deposits or may be a refined product, and is classed as a pitch. The University of Queensland pitch drop experiment, demonstrating the viscosity of asphaltĪsphalt, also known as bitumen ( UK: / ˈ b ɪ tj ʊ m ɪ n/, US: / b ɪ ˈ tj uː m ə n, b aɪ-/), is a sticky, black, highly viscous liquid or semi-solid form of petroleum.