Usati washandisa bhitumini tangi, shoma shoma yenitrogen yemvura inofanira kuunzwa kuti ikurumidze kuitonhodza. Kana tembiricha iri mutangi yasvika patembiricha yenitrogen yemvura, mvura yenitrogen inofanira kuzadzwa kuti tangi isazare. Mafirimu epurasitiki nezvimwe zvinhu zvemakemikari hazvibvumirwi kuiswa kunze kweplagi yemutsipa. Kubva padiki kusvika kuhombe, zvichave zvinonetsa uye kudzidzisa kushandiswa kwebhitumeni matangi.

Bitumen matangi anofanirwa kubatwa nekuchenjerera kudzivirira kudhumhana uye extrusion. Usazvidhonze muminda kana uchifamba, asi usimudze zvakanaka. Inofanirwa kuchengetwa munzvimbo yakaoma uye ine mhepo mukati mevhiki kudzivirira unyoro.

Nekuti mapurojekiti mazhinji ekutonhodza mvura inotenderera anoiswa pasi necalcium, aruminiyamu ion uye acidic uye alkaline munyu. Apo mvura inotonhorera inoyerera nepamusoro pesimbi, sulfides inoumbwa. Pamusoro pezvo, iyo okisijeni yakanyungudika mumvura inotonhorera icharamba ichikonzera corrosion ye electrochemical uye genetic mutation ye ngura.

Nekuda kwekupararira kwemarara uye chiyero mutangi rebhitumini, kupisa kwekushisa kunogadzikana asi kuderera. Kana chikero chakanyanya, mvura inotonhorera inopfapfaidzwa kunze kwekasi. Kana kusvibiswa kwakanyanyisa, pombi ichavharwa, zvichiita kuti kupisa kwekushisa kusashanda.

Kuunganidzwa kwetsvina mumatangi ebhitumeni kuchakonzera kukuvadzwa kwakanyanya kwekupisa conduction, uye kuwedzera kwemumbure mukuunganidza kuchakonzera kuwedzera kwekushandiswa kwesimba. Kunyange tsvina yakaonda kwazvo ichawedzera kuwanda kwekusvibiswa mune imwe yekuwedzera kusvika kune inopfuura 40 muzana yekushanda kwayo.

Iyo mvura inogona kuburitswa kana kudzvanywa mukati mebhitumeni tangi kunosvika pamwero uye kubuda kunodiwa. Kuti uve nechokwadi chekuchena kwezvinhu mukuchengetedza zvinhu uye kuderedza kushandiswa kwezvinhu zvinwiwa panguva yekutevera kudzoreredza, matangi ekuchengetedza haafanire kudonhedzwa zvachose.