1. Cov tshuaj khib sib xyaw ua ke: cov tshuaj khib sib xyaw yog ib hom cement, cov khoom sib xyaw zoo, cov khoom sib xyaw thiab dej, thiab raws li cov khoom ntawm ntau yam khoom, raws li qee qhov piv, tom qab ntsuas ntawm qhov chaw sib tov, sib xyaw, thauj mus rau qhov chaw uas siv lub tsheb thauj khoom, thiab nkag mus rau hauv qhov chaw tshwj xeeb Khaws lub thawv thiab siv cov khoom sib xyaw ua ke tiav rau lub sijhawm teev tseg.
2. Hydroxypropyl methyl cellulose yog siv los ua tus neeg sawv cev khaws dej rau cov cement mortar thiab retarder rau cov mortar pumping. Hauv cov ntaub ntawv ntawm gypsum ua tus binder los txhim kho daim ntawv thov thiab ntev lub sijhawm ua haujlwm, qhov khaws dej ntawm HPMC tiv thaiv cov slurry los ntawm kev tawg sai dhau tom qab ziab, thiab txhim kho lub zog tom qab hardening. Kev khaws dej yog ib qho tseem ceeb ntawm hydroxypropyl methyl cellulose HPMC, thiab nws kuj yog qhov txhawj xeeb ntawm ntau lub tuam txhab tsim cov mortar ntub hauv tsev. Cov yam ntxwv cuam tshuam rau qhov khaws dej ntawm cov mortar ntub suav nrog qhov ntau ntawm HPMC ntxiv, qhov viscosity ntawm HPMC, qhov zoo ntawm cov khoom me me thiab qhov kub ntawm qhov chaw siv.
3. Lub luag haujlwm tseem ceeb ntawm hydroxypropyl methyl celluloseHPMCHauv cov mortar ntub sib xyaw feem ntau muaj peb yam, ib qho yog lub peev xwm tuav dej zoo heev, qhov thib ob yog qhov cuam tshuam rau qhov sib xws thiab thixotropy ntawm cov mortar ntub sib xyaw, thiab qhov thib peb yog kev sib cuam tshuam nrog cement. Kev khaws dej ntawm cellulose ether nyob ntawm qhov nqus dej ntawm lub hauv paus, cov khoom sib xyaw ntawm cov mortar, qhov tuab ntawm cov txheej mortar, qhov xav tau dej ntawm cov mortar, thiab lub sijhawm teeb tsa. Qhov siab dua qhov pom tseeb ntawm hydroxypropyl methyl cellulose, qhov zoo dua qhov khaws dej.
4. Cov yam ntxwv uas cuam tshuam rau kev khaws dej ntawm cov mortar ntub-sib xyaw suav nrog cellulose ether viscosity, ntxiv tus nqi, qhov loj me ntawm cov khoom me me thiab kub. Qhov ntau dua qhov viscosity ntawm cellulose ether, qhov zoo dua qhov khaws dej. Viscosity yog ib qho tseem ceeb ntawm HPMC kev ua tau zoo. Rau tib yam khoom, cov txiaj ntsig ntawm kev siv ntau txoj kev los ntsuas viscosity sib txawv heev, thiab qee qhov txawm tias muaj ob qhov sib txawv. Yog li ntawd, kev sib piv ntawm viscosity yuav tsum tau ua nyob rau hauv tib txoj kev xeem, suav nrog kub, spindle, thiab lwm yam.
5. Feem ntau hais lus, qhov siab dua qhov viscosity, qhov zoo dua qhov khaws cia dej. Txawm li cas los xij, qhov siab dua qhov viscosity, qhov siab dua qhov hnyav molecular ntawm HPMC thiab qhov qis dua qhov solubility ntawm HPMC, uas muaj qhov cuam tshuam tsis zoo rau lub zog thiab kev tsim kho ntawm cov mortar. Qhov siab dua qhov viscosity, qhov ntau dua qhov thickening nyhuv ntawm cov mortar, tab sis nws tsis muaj feem cuam tshuam ncaj qha. Qhov siab dua qhov viscosity, qhov ntau dua qhov ntub mortar, qhov zoo dua qhov kev ua tau zoo ntawm kev tsim kho, qhov kev ua tau zoo ntawm cov viscous scraper thiab qhov siab dua qhov lo rau lub substrate. Txawm li cas los xij, qhov nce ntxiv ntawm cov qauv ntawm cov ntub mortar nws tus kheej tsis pab. Ob qho kev tsim kho tsis muaj qhov pom tseeb tiv thaiv kev ua tau zoo. Hauv kev sib piv, qee qhov nruab nrab thiab qis viscosity tab sis hloov kho hydroxypropyl methyl cellulose muaj kev ua tau zoo heev hauv kev txhim kho lub zog ntawm cov ntub mortar.
6. Qhov ntau dua ntawm cov cellulose ether ntxiv rau HPMC ntub mortar, qhov zoo dua qhov khaws cia dej, thiab qhov siab dua qhov viscosity, qhov zoo dua qhov khaws cia dej. Fineness kuj yog ib qho tseem ceeb ntawm kev ua tau zoo ntawm hydroxypropyl methyl cellulose.
7. Qhov zoo ntawm hydroxypropyl methyl cellulose kuj muaj qee yam cuam tshuam rau nws cov dej khaws cia. Feem ntau, rau hydroxypropyl methyl cellulose nrog tib lub viscosity thiab sib txawv fineness, qhov me dua qhov fineness, qhov me dua qhov dej khaws cia nyhuv nyob rau hauv tib qho ntxiv. qhov zoo dua.
8. Hauv cov mortar ntub-sib xyaw, qhov ntxiv ntawm cellulose ether HPMC yog qhov tsawg heev, tab sis nws tuaj yeem txhim kho kev ua tau zoo ntawm cov mortar ntub, thiab nws yog cov khoom ntxiv tseem ceeb uas feem ntau cuam tshuam rau kev ua tau zoo ntawm mortar. Kev xaiv tsim nyog ntawm hydroxypropyl methyl cellulose, kev ua tau zoo ntawm cov mortar ntub raug cuam tshuam loj heev.
Lub sijhawm tshaj tawm: Plaub Hlis-28-2024