bitumen atural: Peteroli iranyunyuzwa nubutaka bwisi igihe kirekire muri kamere ikaza guhura numwuka nubushuhe. Ibikomoka kuri peteroli yoroheje bigenda byuka buhoro buhoro, kandi bitum ya peteroli ikorwa no kwibanda hamwe na okiside ikunze kuvangwa nigice runaka cyamabuye y'agaciro. Bitumen isanzwe irashobora kugabanywamo ibiyaga bito, bitum bitare, bitumen yo mu mazi, shale yamavuta, nibindi ukurikije ibidukikije ikoreramo.
Urutare rwa bitumen ni ikintu kimeze nka bitumen gikomoka kuri peteroli ya kera yinjira mu mwobo w’amabuye, kandi nyuma yimyaka miriyoni amagana yo gushira, guhinduka, adsorption, hamwe no guhuza, bitewe ningaruka ziterwa ningufu zubushyuhe, umuvuduko, okiside, catalizator, bagiteri, n'ibindi.

Bitumen ya bitumen yahinduwe bitumen ikoresha urutare rwa bitumen nka modifier kandi ikavangwa na matrix bitumen ukurikije igipimo runaka cyo kuvanga. Byahinduwe bitumen ikorwa binyuze mubikorwa nko kuvanga, kogosha, no kwiteza imbere. Yitwa NMB.
Uruvange rwa bitumen rwahinduwe ni uruvange rwakozwe nuburyo "butose" bushingiye kuri "bitumen yahinduwe bitumen" cyangwa imvange yakozwe na "yumye" ishingiye kuri "guhindura bitumen".
"Uburyo bwumye" inzira "Uburyo bwumye" bivuze ko nyuma yo gusuka ibikoresho byamabuye mumasafuriya ivanze, modifier ya bitumen ihindurwamo inkono ivanze hanyuma ikavangwa nibikoresho bya minerval byumye mugihe runaka, hanyuma bigaterwa muri matrix bitumen yo kuvanga Bitumen ivanze inzira.
Uburyo bwa "Wet method" inzira "Wet method" bisobanura ko guhindura bitumen urutare hamwe na bitumen fatizo ku bushyuhe runaka babanje kuvangwa, gutemagurwa, no gutezimbere bitumen yarangije bitumen yahinduwe bitumen, hanyuma bigaterwa mu nkono ivanze kugirango bivange ubutare. Uburyo bwo kuvanga Bitumen.