Ntau cov cuab yeej siv muaj qee yam teeb meem me me thaum siv nws. Txhawm rau kom ua haujlwm nws ib txwm, ua haujlwm soj ntsuam txhua hnub yog zam tsis tau. Cia wb saib seb qhov twg hloov backen (muaj kev sib xyaw: asphalitionene thiab cob) cov cuab yeej xav tau ua hauv lub neej txhua hnub. Cov haujlwm soj ntsuam yog dab tsi?
Peb yuav tsum tau tshuaj xyuas cov emulsifier ntawm cov hloov kho bitumen. Yog tias emulsifier tau siv ntev thiab cov sib txawv ntawm emulsified bitroid zeb yuav loj dua, ces peb yuav tsum tau kho nws lub sijhawm no mus txuas ntxiv. Qhov no yog ib lo lus nug yooj yim sib piv

Soj ntsuam qhov teeb meem ntawm kev hloov kho. Feem ntau, tus nqi ntawm cov hloov kho hloov kho yuav tsum yog qhov chaw. Thaum ntxiv cov nqi yuav tsum tau hloov kho raws li qhov zoo ntawm cov dej siv. Qhov teeb meem no xav tau cov neeg ua haujlwm soj ntsuam. Muaj peev xwm tshwm sim los ntawm cov teeb meem nrog hloov kho bitumen (sib xyaw: specalente thiab cob) nroj tshuag, vim qhov qub me ntsis kuj muaj cov kev sib tw sib txawv. Thaum tsim cov nyiaj rov qab hloov kho, kev saib xyuas kom them rau seb cov khoom siv raw yog cov uas yuav tsum tau ua. Apending abumen thiab lav tau zoo.
Qhov hloov kho Bitumen tsim los ntawm kev hloov cov khoom siv bitumen, ntawm ib sab tes, khawm tau zoo dua qub, uas tuaj yeem ua tiav lub hom phiaj ntawm kev txhim kho kev ua haujlwm ntawm Bitumen txoj kev.
Tsis tas li ntawd, cov txheej txheem hloov kho (muaj kev sib xyaw ua ke Nws tseem yog lub tshuab txuas ntxiv nrog lub tshuab loj loj ntau lawm. Kev sib deev tau hloov kho cov khoom me me uas tau tsim kho tau rau kev tsim cov khoom sib txawv me me thiab nruab nrab ntawm cov khoom siv emulsified. Nws tuaj yeem ua kom tau raws li cov kev xav tau ntawm ntau qhov kev thov thiab tsim cov khoom siv bitumen hloov kho nrog txoj kev siab ua tau zoo thiab sib txawv: ruaj khov; tsis muaj kev hloov).