Asphalt is a sticky, Black and frequently identified, Highly viscous as bitumen liquid or semi, Solid that is present in most crude petroleum s and within specific This product, Natural deposits serves as a substance classed as a pitch. The chief purpose of asphalt is in road construction, Where It serves the purpose of as the glue or binder mixed with aggregate particles to develop asphalt concrete. Its other main uses are for bituminous waterproofing products, Including production of roofing felt and for sealing flat roofs. The terms asphalt and bitumen frequently utilized interchangeably to mean both natural and manufactured forms of the substance. In asphalt or, American english asphalt cement is the carefully refined residue from the distillation process of selected crude oils.