Hydroxyethyl cellulose (HEC) yog ib qho tseem ceeb heev uas ua lub luag haujlwm tseem ceeb hauv kev txau cov roj hmab asphalt uas ua kom sai thiab tsis yooj yim rau dej nkag. Nws cov haujlwm tseem ceeb suav nrog kev ua kom tuab, khaws dej, kho qhov rheology thiab kev ruaj khov ntawm kev ncua.
1. Cov nyhuv tuab
Ua ib qho thickener uas tsis yog ionic, hydroxyethyl cellulose tuaj yeem ua rau kom muaj viscosity ntau ntxiv ntawm cov roj hmab asphalt uas txau sai sai. Vim nws cov yam ntxwv viscosity siab, HEC tuaj yeem ua rau kom muaj viscosity ntawm cov txheej kom nws tuaj yeem tswj tau qhov sib xws thaum lub sijhawm tsim kho. Lub luag haujlwm no tseem ceeb heev rau kev txau kev tsim kho, vim tias qhov viscosity tsim nyog pab cov xim kom sib npaug, txo qhov sagging, thiab xyuas kom meej tias qhov tuab ntawm cov txheej, yog li ua tiav cov teebmeem dej tsis zoo.
2. Cov nyhuv ntawm kev khaws dej
HEC muaj kev khaws cia dej zoo heev, uas yog qhov tseem ceeb tshwj xeeb hauv cov txheej txheej dej. Hauv cov txheej txheej tiv thaiv dej asphalt uas muaj cov tshuaj tsuag sai, HEC tuaj yeem ua rau qeeb qeeb ntawm cov dej hauv cov txheej txheej los ntawm kev khaws cov dej noo. Qhov no tsis yog tsuas yog pab tswj cov dej noo ntawm cov txheej txheej thaum lub sijhawm tsim kho thiab tiv thaiv cov txheej txheej kom tsis txhob qhuav vim dej poob sai, tab sis kuj txhawb kev nkag mus ntawm cov txheej txheej rau ntawm lub substrate thiab txhim kho kev nplaum rau lub substrate, yog li txhim kho qhov kev ua tau zoo ntawm cov txheej tiv thaiv dej.
3. Kev hloov kho Rheology
Rheology yog hais txog cov yam ntxwv ntawm cov xim ntws hauv qab kev ua ntawm cov zog sab nraud. HEC ua haujlwm ua tus hloov pauv rheology hauv kev txau cov roj hmab asphalt dej tsis muaj zog sai, uas tuaj yeem kho qhov kev coj cwj pwm rheological ntawm cov txheej kom nws pom viscosity siab dua ntawm qhov shear qis thiab viscosity siab dua ntawm qhov shear siab. viscosity qis. Qhov kev coj cwj pwm shear-thinning rheological no pab lub twj tso kua xim thiab tsuag hauv cov khoom siv tsuag thiab sai sai rov qab mus rau viscosity siab dua tom qab thov, yog li txo cov xim los ntshav thiab xyuas kom meej tias du thiab sib xws ntawm cov txheej. .
4. Kev ncua thiab kev ruaj khov
Thaum txau cov roj hmab asphalt uas teeb tsa sai sai, ntau yam khoom khov kho, xws li cov roj hmab, cov khoom sau, thiab lwm yam, yuav nyob hauv cov txheej vim muaj qhov sib txawv ntawm qhov ceev. Los ntawm kev tsim cov qauv network siab-viscosity, HEC tuaj yeem ncua cov khoom khov kho no thiab tiv thaiv lawv kom tsis txhob nyob hauv lub sijhawm khaws cia thiab tsim kho. Qhov kev ncua kev ruaj khov no pab tswj kom muaj kev sib xws ntawm cov xim thiab xyuas kom meej tias cov xim tsuag muaj cov khoom sib xws, yog li tsim cov txheej txheem tsis muaj dej tom qab kho thiab txhim kho cov nyhuv dej.
5. Kev txhim kho kev ua tau zoo ntawm kev tsim kho
Cov haujlwm ntau yam ntawm HEC tuaj yeem txhim kho kev ua haujlwm ntawm kev txau cov roj hmab asphalt tiv thaiv dej sai. Ua ntej tshaj plaws, HEC cov nyhuv thickening thiab rheology kho kom zoo ua rau cov xim muaj kev ua haujlwm zoo thaum lub sijhawm txau, yooj yim rau kev thov thiab tsim cov txheej du. Qhov thib ob, nws cov dej khaws cia pab txhim kho kev lo rau ntawm cov xim rau lub substrate thiab txo cov qhov tsis zoo ntawm cov txheej uas tshwm sim los ntawm kev tawg qhuav. Tsis tas li ntawd, cov nyhuv ntawm kev ncua kev ruaj ntseg ntawm HEC tuaj yeem tswj tau qhov sib xws ntawm cov khoom xyaw txheej, yog li ua kom ntseeg tau tias cov khoom ruaj khov ntawm cov txheej tom qab kev tsim kho thiab txuas ntxiv lub neej kev pabcuam ntawm cov txheej.
Kev siv hydroxyethyl cellulose hauv kev txau cov roj hmab asphalt tiv thaiv dej sai sai ua lub luag haujlwm tseem ceeb hauv ntau yam. Nws tsis tsuas yog ua rau cov xim pleev xim viscosity thiab txhim kho kev khaws dej, tab sis kuj kho cov khoom rheological ntawm cov xim pleev xim, ua kom cov khoom khov kho hauv cov xim pleev xim ruaj khov, thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Cov teebmeem no ua ke ua kom muaj kev ua tau zoo thiab kev ua haujlwm ntev ntawm cov txheej hauv kev siv tiag tiag, ua rau hydroxyethyl cellulose yog ib qho khoom ntxiv tseem ceeb hauv kev txau cov roj hmab asphalt tiv thaiv dej sai sai. Los ntawm kev xaiv thiab siv HEC tsim nyog, kev ua tau zoo ntawm cov txheej tiv thaiv dej tuaj yeem txhim kho tau zoo heev, yog li muab cov kev daws teeb meem txhim khu kev qha rau kev tiv thaiv dej hauv tsev.
Lub sijhawm tshaj tawm: Lub Xya Hli-08-2024