Emulsion bitumen yog ib qho emulsion tshiab tsim los ntawm kev ua haujlwm ntawm asphalt thiab emulsifier aqueous kua.
Emulsion bitumen yog cais raws li cov khoom sib txawv ntawm cov khoom siv bitumen emulsifier siv: cationic emulsion bitumen, anionic emulsion bitumen thiab nonionic emulsion bitumen.
Ntau tshaj 95% ntawm txoj kev tsim kho siv cationic emulsion bitumen. Vim li cas cationic emulsion bitumen muaj qhov zoo li no?
1. Cov dej selectivity yog qhov dav. Bitumen, dej thiab bitumen emulsifier yog cov ntaub ntawv tseem ceeb rau emulsion bitumen. Anionic emulsified bitumen yuav tsum tau npaj nrog dej mos thiab tsis tuaj yeem diluted nrog dej nyuaj. Rau cationic emulsion bitumen, koj tuaj yeem xaiv emulsion bitumen rau cov dej tawv. Koj tuaj yeem siv dej tawv los npaj cov tshuaj emulsifier aqueous, lossis koj tuaj yeem dilute nws ncaj qha.
2. Yooj yim ntau lawm thiab zoo stability. Kev ruaj ntseg ntawm anions tsis zoo thiab cov khoom siv ntxiv yuav tsum tau muab ntxiv los xyuas kom meej qhov ruaj khov ntawm cov khoom tiav. Feem ntau, cationic emulsion bitumen tuaj yeem tsim cov emulsion bitument ruaj khov yam tsis ntxiv lwm cov khoom ntxiv.
3. Rau cationic emulsion bitumen, muaj ntau txoj hauv kev los kho cov demulsification ceev thiab tus nqi qis.
4. Cationic emulsified asphalt tseem tuaj yeem tsim tau raws li ib txwm muaj nyob rau lub caij ntuj sov lossis qis qis (siab dua 5 ℃).
5. Zoo adhesion rau pob zeb. Cationic emulsion bitumen hais muaj cov nqi cationic. Thaum nyob rau hauv kev sib cuag nrog pob zeb, asphalt hais yog sai sai adsorbed rau ntawm lub pob zeb vim qhov attraction ntawm opposite zog. Siv hauv micro surfacing thiab slurry foob kev tsim kho.
6. Lub viscosity ntawm cationic emulsion bitumen zoo dua li ntawm anionic emulsion bitumen. Thaum pleev xim, cationic emulsion bitumen yog qhov nyuaj dua, yog li koj tuaj yeem xaiv tshuaj tsuag nws. Ntawm qhov tsis sib xws, anionic emulsion bitumen yooj yim pleev xim. Nws tuaj yeem siv los ua cov roj txheej nkag thiab cov roj nplaum nplaum hauv lub tsev tsis muaj dej tsis zoo thiab txoj kev paving.
7. Cationic emulsion bitumen qhib rau kev khiav ceev ceev.