Atural bitumen: An dade ana matse man fetur da ɓawon ƙasa a yanayi kuma yana haɗuwa da iska da danshi. Abun cikinsa mai haske yana ƙafewa sannu a hankali, kuma bitumen na man fetur da aka samu ta hanyar maida hankali da oxidation galibi ana haɗe shi da wani kaso na ma'adanai. Ana iya raba bitumen na halitta zuwa tafki bitumen, dutse bitumen, bitumen na karkashin ruwa, shale mai, da dai sauransu bisa yanayin da aka samu.
Rock bitumen wani abu ne mai kama da bitumen da aka samo daga tsohon man fetur yana shiga cikin tsagewar duwatsu, kuma bayan daruruwan miliyoyin shekaru na ajiya, canji, adsorption, da fusion, a ƙarƙashin haɗin gwiwar makamashin zafi, matsa lamba, oxidation, catalysts, kwayoyin cuta, da dai sauransu.

Dutsen bitumen da aka gyaggyarawa bitumen yana amfani da bitumen dutse a matsayin mai gyara kuma ana haɗe shi da bitumen matrix bisa ga ƙayyadaddun rabon haɗakarwa. Ana samar da gyare-gyaren bitumen ta hanyoyi kamar haɗawa, shear, da haɓakawa. Ana kiransa da NMB.
Haɗin bitumen da aka gyaggyara cakuda bitumen cakuɗe ne da aka samar ta hanyar “rigar” bisa tushen “rock bitumen modified bitumen” ko cakuda da aka samar ta hanyar “bushe” bisa “gyaran bitumen dutse”.
Hanyar "Bushewar Hanyar" tana nufin cewa bayan an zuba kayan ma'adinai a cikin tukunyar hadawa, sai a saka dutsen bitumen modifier a cikin tukunyar hadawa a gauraya da kayan ma'adinan a bushe na wani ɗan lokaci, sannan a fesa a ciki. da matrix bitumen don rigar cakuda bitumen tsari.
“Hanyar rigar” tsari na “Hanyar rigar” yana nufin cewa mai gyara bitumen dutsen da bitumen tushe a wani yanayin zafi ana fara haɗa su, a yi sheared, a haɓaka su cikin ƙaƙƙarfan bitumen dutsen da aka gyara bitumen, sannan a fesa a cikin tukunyar hadawa don haɗuwa da shi. tama. Bitumen cakuda cakuda tsari.