Rau kev ntseeg tau thiab kev nkag nrawm nrawm thaum daim ntawv thov, bitumen emulsions tsuas yog diluted bitumen. Nws yog dav siv rau cov ntawv thov sib txawv hauv kev tsim kev lag luam. Kev kho deg yog ua kom ntseeg tau tias cov txheej txheej sab nraud ntawm txoj kev lossis txoj kev pua chaw muaj kev nyab xeeb ntawm dej lossis dej noo noo. Nws tiv taus cov khaub ncaws nplua thiab cov kev tiv thaiv txoj kev loj. Kev ua tau zoo txawm li cas los xij cuam tshuam los ntawm kev sib sau ua ke, emulsion sib xws, thiab kub.

Yuav ua li cas bitumen emulsion tau?
Bitumen emulsion yog tsim nyob rau hauv ob kauj ruam yooj yim. Cov dej yog thawj ua ke nrog ib tug neeg sawv cev emulsifying thiab lwm tus neeg sawv cev tshuaj. Tom qab ntawd, ib lub zeb colloidal yog siv los ua ke dej, emulsifier, thiab bitumen. Nyob ntawm qhov kawg-siv ntawm bitumen emulsion, qhov ntau ntawm bitumen yog ntxiv rau qhov sib xyaw. Thaum lub emulsifier tau ua los ua cov khoom tseem ceeb, nws tuaj yeem siv ntawm 60-70%.

Tus nqi ntawm bitumen ntxiv rau qhov sib tov yog nruab nrab ntawm 40% thiab 70%. Lub zeb colloidal cais cov bitumen rau hauv cov ntawv me me. Qhov nruab nrab tsis tshua muaj loj yog kwv yees li 2 microns. Tab sis cov tee dej sim los khom thiab koom nrog txhua lwm yam. Lub emulsifier, yog li ntxiv ib qho txheej txheej ntawm tus nqi sib txawv ib puag ncig txhua lub teeb meem, pab ua kom cov dej ntws tawm kom deb ntawm ib leeg. Kev sib xyaw kom tau los ntawm colloidal zeb yog ua tiav thiab siv raws li cov lus qhia thiab tom qab khaws cia rau hauv kev tso tsheb hlau luam.

Hom Bitumen:
Lub bitumen emulsion yog categorized ua ob hom:
Raws li lub sijhawm teem sijhawm
Raws li kev them nqi

Raws li lub sijhawm teem sijhawm
Yog tias emulsions ntawm bitumen tau ntxiv rau aggregates, dej yog evaporated, thiab cov kuab tshuaj raug tshem tawm. Tom qab ntawd bitumen ntws dhau lub hauv paus siab, ua haujlwm ua tus sawv cev ntawm txoj kev khi thiab maj mam txhawb nws tus kheej. Cov txheej txheem no tau muab faib ua peb pawg hauv qab no, nyob ntawm seb qhov dej ntws evaporates twg thiab bitumen hais los ntawm dej:
Kev teeb tsa sai sai ntawm emulsion (Rs)
Nruab nrab teeb tsa (MS)
Qeeb Maiv Emulsion (SS)

Bitumen yog txhais tau txhawm rau txhawm rau yooj yim li cov emulsion yog hom teeb meem sai sai. Daim ntawv no ntawm emulsion teeb tsa yooj yim thiab kho. Ib zaug tso rau kev sib sau ua ke, cov emulsions ntawm nruab nrab chaw tsis tawg poob nthav. Txawm li cas los xij, thaum cov ntxhia ntxhib yog sib xyaw ua ke nrog cov sib xyaw ua ke nrog cov sib xyaw ua ke emulsifier sib tov, cov txheej txheem kev rhuav tshem pib. Kev tshem tawm qeeb yog tsim nrog kev pab ntawm hom tshwj xeeb ntawm emulsifier uas qeeb qeeb ntawm cov txheej txheem teeb tsa. Cov ntaub ntawv emulsion no yog qhov muaj zog heev.

Raws li kev them nqi
Bitumen Emulsions tau muab faib ua ntu zus rau hauv peb pawg hauv qab no nyob ntawm hom them nqi nto:
Anionic bitumen emulsion
Cationic Bitumen Emulsion
Tsis-ionic Bitumen Emulsion

Bitumen hais yog Electro-tsis zoo them rau thaum anionic bitumen emulsion, whereas nyob rau hauv rooj plaub ntawm cationic bitumion, bituminous hais tawm yog electro-zoo. Niaj hnub no, lub cationic emulsion ntawm bitumen yog siv feem ntau. Raws li cov ntxhia muaj pes tsawg leeg ntawm kev sib sau ua ke rau lub tsev, nws yog ib qho tseem ceeb kom xaiv lub emulsion ntawm bitumen. Cov muaj pes tsawg leeg ntawm cov aggregates ua electro-tsis zoo them rau hauv cov rooj plaub ntawm Silica-nplua nuj articegates. Lub cationic emulsion yuav tsum, yog li ntawd, yuav ntxiv. Qhov no yuav pab nthuav tawm cov me nyuam me thiab muab sib xyaw ua ke nrog kev sib xyaw kom zoo dua. Rau cov kev daws teeb meem aqueous, tsis yog-ionic surfactants tsis nyiam ions. Lub solubility yog ua raws li lub hav zoov ntawm polar molecules. Kev siv cov tsis muaj txiaj ntsig zoo li emulsifier, tab sis tsis yog nyob hauv cov txheej txheem dej, tab sis nyob rau hauv cov txheej txheem bitumen, raws li cov lus piav qhia zoo li lawv tau sib xws nrog txhua ion surfactants.

Tsis muaj emulsion ntawm txhua yam yog txaus rau txhua txoj haujlwm; Nws nyob ntawm acidic los yog theem pib ntawm cov aggregate. Raws li cov cua kub, cua ceev thiab emulsion loj, lub sijhawm teeb tsa tej zaum yuav txawv. Lub peev xwm rau kev cia yog tsawg kawg nkaus. Qhov kev faib tawm saum toj no yog ib phau ntawv qhia los xaiv qhov kev sib tw txoj cai rau koj cov kev xav tau.