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Chapter 517 Asphalt concrete pavement is the ownership of Daqin Chidao
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... divided into coal tar pitch, petroleum pitch and natural pitch.
Among them, coal tar pitch is a by-product of coking, and petroleum pitch is the residue after crude oil distillation.
Natural bitumen is stored underground, and some form ore layers or accumulate on the surface of the earth's crust.
Asphalt is mainly used in coatings, plastics, rubber and other industries as well as pavement.
In the era of Daqin, at least for now, its only function is as an adhe ...
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