Cellulose ethers muab cov viscosity zoo heev rau cov khib nyiab ntub dej, ua rau muaj peev xwm ua kom muaj peev xwm ntawm cov khib nyiab ntub rau hauv cov substrate thiab txhim kho cov sagging tsis kam ntawm mortar, thiab yog siv dav hauv plastering mortar, cib bonding mortar thiab sab nrauv rwb thaiv tsev. Cov nyhuv thickening ntawm cellulose ether tuaj yeem ua rau kom muaj peev xwm tiv thaiv kev sib cais thiab kev sib xyaw ntawm cov khoom sib xyaw tshiab, tiv thaiv cov khoom siv delamination, kev sib cais thiab dej tso tawm, thiab tuaj yeem siv rau hauv fiber ntau pob zeb, underwater pob zeb thiab nws tus kheej-compacting pob zeb.
Cov nyhuv thickening ntawm cellulose ethers ntawm cov ntaub ntawv cementitious tshwm sim los ntawm viscosity ntawm cellulose ether kua. Nyob rau tib lub sijhawm, qhov siab dua ntawm cov viscosity ntawm cellulose ether, qhov viscosity zoo dua ntawm cov khoom siv cementitious hloov, tab sis yog tias cov viscosity siab dhau lawm, nws yuav cuam tshuam rau cov dej ntws thiab kev ua haujlwm ntawm cov khoom (xws li nplaum plaster riam). Self-leveling mortars thiab self-compacting pob zeb, uas yuav tsum tau muaj fluidity, yuav tsum tau tsawg viscosity ntawm cellulose ethers. Tsis tas li ntawd, cov nyhuv thickening ntawm cellulose ethers tsub kom cov dej yuav tsum tau ntawm cementitious cov ntaub ntawv thiab tsub kom lub yield ntawm mortar.
Lub viscosity ntawm cellulose ether daws nyob ntawm cov hauv qab no: molecular hnyav ntawm cellulose ether, concentration, kub, shear npaum li cas thiab xeem txoj kev. Raws li cov xwm txheej zoo ib yam, qhov hnyav dua molecular ntawm cellulose ether, qhov siab dua qhov viscosity ntawm cov tshuaj; qhov siab dua qhov concentration, qhov siab dua qhov viscosity ntawm cov tshuaj, nyob rau hauv kev siv cov xim yuav tsum tau them nyiaj kom tsis txhob siv ntau dhau thiab cuam tshuam rau kev ua haujlwm ntawm mortar thiab pob zeb; cellulose ether kua viscosity yuav txo nrog qhov nce ntawm qhov kub thiab txias, thiab qhov siab dua qhov concentration, ntau dua qhov kub ntawm qhov kub; Cov tshuaj cellulose ether feem ntau yog cov kua dej pseudoplastic, nrog cov xwm txheej ntawm shear thinning, qhov kev sim ntau dua Qhov ntau dua qhov shear npaum li cas ntawm qhov kev sim, qhov me dua qhov viscosity, yog li cov cohesion ntawm cov mortar yuav raug txo nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam, uas yog conducive rau lub scraping kev tsim kho ntawm mortar, thiaj li hais tias cov kev ua hauj lwm zoo nyob rau hauv tib lub sij hawm thiab cohesion ntawm mortar. vim hais tias cov tshuaj cellulose ether yog cov kua uas tsis yog-Newtonian, qhov kev xeem viscosity xeem txoj kev, kev ntsuas los yog kev sim ib puag ncig, tib lub cellulose ether kua tshuaj ntsuam xyuas yuav txawv heev.
Post lub sij hawm: Apr-01-2022