Hauv kev sib xyaw mortar, qhov sib ntxiv ntawm cellulose ether yog tsawg heev, tab sis nws tuaj yeem txhim kho kev ua haujlwm ntawm cov khib nyiab ntub dej, uas yog ib qho tseem ceeb ntxiv cuam tshuam rau kev tsim kho ntawm mortar. Lub luag haujlwm tseem ceeb ntawm HPMC hauv mortar feem ntau yog nyob rau hauv peb yam, ib qho yog cov dej tuav tau zoo, qhov thib ob yog cov nyhuv ntawm cov tshuaj khib nyiab, thiab qhov thib peb yog kev cuam tshuam nrog cov cement.
1. Qhov ntau dua qhov viscosity ntawm cellulose ether, qhov dej tuav tau zoo dua.
2. Qhov loj dua qhov sib ntxiv ntawm cellulose ether nyob rau hauv mortar, qhov dej tuav tau zoo dua.
3. Rau particle loj, qhov finer particle, qhov zoo dua cov dej tuav.
4. Cov dej tuav ntawm methyl cellulose ether txo qis nrog qhov kub thiab txias.
Cov nyhuv thickening ntawm hydroxypropyl methyl cellulose raws li ib tug thickener muaj feem xyuam rau cov particle loj, viscosity thiab kev hloov ntawm hydroxypropyl methyl cellulose. Feem ntau hais lus, qhov siab dua qhov viscosity ntawm cellulose ether, qhov me me ntawm cov particle loj, qhov pom tseeb dua cov nyhuv thickening.
Lub luag haujlwm thib peb ntawm cellulose ethers yog los tiv thaiv cov txheej txheem dej ntawm cov cement. Cellulose ethers muab mortar ntau yam muaj txiaj ntsig thiab tseem txo qis cov dej kub thaum ntxov ntawm cov cement thiab retard lub hydration zog txheej txheem ntawm cement. Qhov siab dua qhov concentration ntawm cellulose ether nyob rau hauv cov khoom ntxhia gel, qhov pom tseeb dua cov nyhuv ntawm ncua dej. Cellulose ethers tsis tsuas yog retard qhov chaw, tab sis kuj ncua lub hardening txheej txheem ntawm cement mortar systems. Nrog rau qhov nce ntawm HPMC koob tshuaj, lub sijhawm teem sijhawm ntawm cov tshuaj khib nyiab tau nce ntxiv.
Nyob rau hauv cov ntsiab lus, nyob rau hauv npaj sib tov mortar, HPMC plays lub luag hauj lwm ntawm dej tuav, thickening, ncua lub hydration zog ntawm cement thiab txhim kho kev tsim kho kev ua tau zoo. Lub peev xwm khaws dej zoo ua rau cov cement hydration ntau dua, uas tuaj yeem txhim kho cov nplaum ntub dej ntawm cov mortar ntub thiab ua rau kom muaj zog ntawm mortar. Yog li ntawd, HPMC tau dav siv los ua ib qho tseem ceeb ntxiv hauv cov khoom sib xyaw ua ke.
Post lub sij hawm: Jan-20-2022