Mhando dzemidziyo yakagadziridzwa yebhitumeni inogona kukamurwa kuva marudzi mazhinji. Yakagadziridzwa bhitumini michina inogona kukamurwa kuita mhando nhatu: inopindirana yekushanda mhando, semi-inoenderera yekushanda mhando, uye inoenderera yekushanda mhando zvinoenderana nehunyanzvi matanho. Kune marudzi akasiyana-siyana ebhitumini yakagadziridzwa Ndedzipi pfungwa dzinozivikanwa pamusoro pemidziyo?
Zvinhu zvakagadziridzwa emulsify bitumen. Munguva yekugadzira, demulsifier, asidhi, mvura, uye latex yakagadziridzwa zvinhu zvinosanganiswa mu sipo yekusanganisa tangi, uye ipapo emulsified bhitumini pasi pemvura kongiri inoiswa mu colloidal solution mill. Kushandiswa kwematangi ekuchengetera bhitumini kunofanirwa kufunga nezvekuenderera mberi kwekugadzirwa kwebhitumini musanganiswa wekusanganisa muchina, uye kudzivirira kudyara kwakanyanya, izvo zvinogona kukonzera kudyiwa uye kuwedzera mitengo. Mari yacho inofanira kutariswa zvinobudirira zvichibva pakushandiswa kwebhitumini.
Mushure mekunge gaba resipo rinoshandiswa kumusoro, sipo inogadzirwa, uye ipapo kugadzirwa kwegaba rinotevera rinotangwa. Kana ichishandiswa kugadzira yakagadziridzwa emulsified bitumen, zvichienderana nehunyanzvi hwezvinhu zvakagadziridzwa, iyo latex pombi inogona kubatanidzwa pamberi kana mushure meiyo micronizer. Panogona kunge pasina pombi yakatsaurirwa yelatex, asi yemanyorero. Wedzera huwandu hwakatarwa hwe latex kune sipo mudziyo.
Iyo yakagadziridzwa bhitumini midziyo ndeye inopindirana yakagadziridzwa bhitumini midziyo ine sipo yemvura yekusanganisa tangi, uye sipo yemvura inogona kutsiviwa ipapo kuti ive nechokwadi chekuti sipo inoramba ichiiswa muchigayo checolloidal. Iyo bhitumini yekuchengetera tangi ndiyo imwe mhando nyowani yebhitumini yekudziya yekuchengetera midziyo yakagadzirwa nekubatanidza maitiro echinyakare-yepamusoro-tembiricha yemafuta-anopisa bhitumeni matangi ekuchengetera uye mukati akadzingirwa nekukurumidza bhitumini kupisa matangi.
Hunhu hweakagadziridzwa bhitumeni midziyo ndeiyi: kupisa nekukurumidza, kuchengetedza kwezvakatipoteredza uye kuchengetedza simba, yakakura kubuda, kusashandiswa kweiyo inoshandiswa, kusachembera, uye kushanda kuri nyore. Zvese zvikamu zvinogona kuiswa patangi, kufambisa, kusimudzwa, uye kuongororwa, izvo zvakanyanya nyore. Zviri nyore chaizvo kufamba-famba. Ichi chigadzirwa chinogona kupisa bhitumini inopisa kusvika madhigirii 160 mukati memaminitsi asingasviki makumi matatu.
