Cellulose ethers muab viscosity zoo heev rau cov mortar ntub, ua rau muaj peev xwm sib txuas ntawm cov mortar ntub rau lub substrate thiab txhim kho qhov tsis kam ntawm mortar, thiab siv dav hauv plastering mortar, brick bonding mortar thiab sab nraud rwb thaiv tsev. Qhov thickening effect ntawm cellulose ether kuj tseem tuaj yeem ua rau muaj peev xwm tiv thaiv kev tawg thiab kev sib xws ntawm cov ntaub ntawv sib xyaw tshiab, tiv thaiv cov khoom delamination, kev sib cais thiab kev tso dej tawm, thiab tuaj yeem siv rau hauv fiber concrete, underwater concrete thiab self-compacting concrete.
Qhov ua kom tuab ntawm cov cellulose ethers ntawm cov ntaub ntawv cementitious yog los ntawm qhov viscosity ntawm cov kua cellulose ether. Nyob rau hauv tib lub xeev, qhov viscosity siab dua ntawm cov cellulose ether, qhov viscosity zoo dua ntawm cov khoom siv cementitious hloov kho, tab sis yog tias viscosity siab dhau, nws yuav cuam tshuam rau qhov fluidity thiab workability ntawm cov khoom siv (piv txwv li cov riam plaster nplaum). Cov mortars self-levelling thiab cov pob zeb self-compacting, uas xav tau fluidity siab, xav tau viscosity qis ntawm cellulose ethers. Tsis tas li ntawd, qhov ua kom tuab ntawm cellulose ethers ua rau cov dej xav tau ntau ntxiv ntawm cov ntaub ntawv cementitious thiab ua rau cov mortar ntau ntxiv.
Qhov viscosity ntawm cellulose ether cov kua nyob ntawm cov hauv qab no: qhov hnyav molecular ntawm cellulose ether, concentration, kub, shear rate thiab txoj kev sim. Nyob rau hauv tib lub xeev, qhov loj dua qhov hnyav molecular ntawm cellulose ether, qhov siab dua qhov viscosity ntawm cov kua; qhov siab dua qhov concentration, qhov siab dua qhov viscosity ntawm cov kua, hauv kev siv ntawm kev saib xyuas yuav tsum tau them nyiaj kom tsis txhob muaj ntau dhau dosing thiab cuam tshuam rau cov khoom ua haujlwm ntawm mortar thiab pob zeb; cellulose ether kua viscosity yuav txo qis nrog qhov nce ntawm qhov kub, thiab qhov siab dua qhov concentration, qhov loj dua qhov cuam tshuam ntawm kub; cellulose ether kua feem ntau yog cov kua pseudoplastic, nrog rau qhov xwm txheej ntawm shear thinning, qhov loj dua qhov kev sim Qhov loj dua qhov shear rate ntawm qhov kev sim, qhov me dua qhov viscosity, yog li qhov cohesion ntawm mortar yuav raug txo qis nyob rau hauv qhov kev ua ntawm cov rog sab nraud, uas yog conducive rau scraping kev tsim kho ntawm mortar, yog li ntawd mortar tuaj yeem muaj kev ua haujlwm zoo thiab cohesion tib lub sijhawm; Vim tias cov kua cellulose ether yog cov kua dej tsis yog Newtonian, cov txheej txheem kuaj viscosity, cov cuab yeej lossis qhov chaw kuaj, cov txiaj ntsig ntawm kev kuaj cellulose ether tib yam yuav txawv heev.
Lub sijhawm tshaj tawm: Plaub Hlis-01-2022