Asphalt is a complex black-brown mixture composed of different molecular weight hydrocarbons and their non-metallic derivatives, which is a kind of high viscosity organic liquid, is liquid, and has a black surface, which can dissolve in carbon. Bitumen is a kind of organic cementitious material which is waterproof, moistureproof and anti-corrosion. Asphalt can be divided into three kinds of coal tar pitch, Ti aspalto ti petroleo ken ti natural nga aspalto: Ti tono ti alkitran ti karbon ket maysa a by-product ti coking. ti petroleum a bitumen ket isu ti nabati kalpasan ti panagdistila ti krudo. a natural a bitumen ket naidulin iti uneg ti daga, dagiti dadduma ket mangporma ti maysa a seam wenno maurnong iti rabaw ti ukis. .
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