Ezweni lethu, izinto eziningi zokusetshenziswa ezisetshenziswa ekwakhiweni komgwaqo omkhulu ziyi-asphalt, ngakho-ke izitshalo zokuxuba i-asphalt nazo zikhula ngokushesha. Kodwa-ke, ngokuthuthuka okusheshayo komnotho wezwe lami, izinkinga zokuhamba ngetiyela ziya ngokuya zikhula, ngakho izidingo zemakethe zekhwalithi yetiyela ziya ngokuya zikhuphuka.

Kunezici eziningi ezithinta ikhwalithi yokusetshenziswa kwe-asphalt. Ngaphezu kwemishini ehlangabezana nezidingo ezijwayelekile zesitshalo sokuxuba i-asphalt, ingxenye yezinto zokusetshenziswa nayo ibaluleke kakhulu. Imithetho yemboni yamanje yezwe lami ibeka ukuthi usayizi wezinhlayiyana zengxube yetiyela esetshenziswa ongqimbeni olungaphezulu lomgwaqo onguthelawayeka angeke weqe ingxenye yongqimba oluwugqinsi, ubukhulu bezinhlayiyana zengxube ongqimbeni oluphakathi angeke budlule ingxenye yogqinsi lwezimbili- okwesithathu ungqimba, futhi usayizi wesendlalelo sesakhiwo awukwazi ukudlula ukujiya okufanayo. ingxenye eyodwa kwezintathu yongqimba.
Kungabonakala emithethweni engenhla ukuthi uma kuyingqimba ye-asphalt yobukhulu obuthile, ubukhulu bezinhlayiyana zengxube ye-asphalt ekhethiwe bukhulu kakhulu, okuzophinde kube nomthelela omkhulu ekwakhiweni komgwaqo we-asphalt ukhonkolo. Ngalesi sikhathi, isilinganiso sezinto zokusetshenziswa kufanele sicatshangelwe. Kufanele siphenye imithombo eminingi ehlanganisiwe ngangokunokwenzeka uma kunengqondo. Ngaphezu kwalokho, imodeli yesitshalo sokuxuba i-asphalt nayo ingenye yezinto okufanele zicatshangelwe.
Ukuze kuqinisekiswe ikhwalithi yokugandaya, abasebenzi kufanele bahlole ngokucophelela futhi bahlole izinto zokusetshenziswa. Ukukhethwa nokunqunywa kwezinto ezingavuthiwe kudingeka kusekelwe ezidingweni zesakhiwo somgwaqo kanye nekhwalithi yokusetshenziswa, kuhlanganiswe nesimo sangempela sokuhlinzeka, ukukhetha izinto ezifanele ukuze izinkomba zempahla eluhlaza zikwazi ukuhlangabezana nezidingo ezicacisiwe.