Lub luag hauj lwm ntawm hydroxypropyl methyl cellulose nyob rau hauv ntub mortar

Lub luag haujlwm ntawmHPMCnyob rau hauv ntub mortar

Kev ntub dej sib xyaw mortar: Mixed mortar yog ib hom cement, nplua aggregate, admixture thiab dej, thiab raws li cov khoom ntawm ntau yam khoom, nyob rau hauv ib qho kev faib ua feem, tom qab ntsuas ntawm qhov chaw sib tov, sib tov, thauj mus rau qhov chaw siv los ntawm lub tsheb, mus rau hauv ib tug tshwj xeeb cia thawv, thiab siv nyob rau hauv lub sij hawm teev cov tiav ntub sib tov.

Hydroxypropyl methyl cellulose yog siv los ua tus neeg saib xyuas dej rau cov cement mortar, retarder mortar pumping. Nyob rau hauv gypsum raws li ib tug binder los txhim kho daim ntawv thov thiab ncua lub sij hawm ua hauj lwm, hydroxypropyl methylcellulose HPMC dej tuav kom cov slurry tom qab ziab yuav tsis ceev heev thiab tawg, hardening los txhim kho lub zog. Kev tuav dej yog ib qho cuab yeej tseem ceeb ntawm hydroxypropyl methyl cellulose HPMC, thiab nws kuj yog qhov kev txhawj xeeb ntawm ntau cov chaw tsim khoom ntub dej. Cov yam ntxwv uas cuam tshuam rau cov dej khaws cia ntawm cov khib nyiab ntub dej muaj xws li HPMC ntxiv, qhov viscosity ntawm HPMC, qhov zoo ntawm cov khoom thiab qhov kub ntawm qhov chaw siv.
Hydroxypropyl methyl cellulose HPMC nyob rau hauv ntub mortar lub luag hauj lwm nyob rau hauv peb yam, ib tug yog zoo heev cov dej tuav peev xwm, qhov thib ob yog cov ntub mortar sib xws thiab thixotropy ntawm cov cawv, qhov thib peb yog kev sib cuam tshuam nrog cov cement. Cellulose ether dej tuav yog nyob ntawm seb qhov nqus dej ntawm lub hauv paus, mortar mortar muaj pes tsawg leeg, mortar txheej thickness, mortar dej thov, teem sij hawm. Qhov siab dua qhov pom ntawm hydroxypropyl methyl cellulose, qhov zoo dua cov dej tuav.
Cov yam ntxwv cuam tshuam rau cov dej tuav ntawm cov khib nyiab ntub dej muaj xws li viscosity ntawm cellulose ether, ntxiv tus nqi, qhov loj me thiab qhov kub thiab txias. Qhov ntau dua qhov viscosity ntawm cellulose ether, qhov dej tuav tau zoo dua. Viscosity yog qhov tseem ceeb rau kev ua haujlwm ntawm HPMC. Rau tib yam khoom, siv ntau txoj hauv kev los ntsuas qhov viscosity ntawm cov txiaj ntsig sib txawv, qee qhov txawm tias los ntawm ib qho ntawm ob. Yog li ntawd, kev sib piv viscosity yuav tsum tau ua nyob rau hauv tib txoj kev sim, xws li kub, rotor, thiab lwm yam.

Feem ntau hais lus, qhov siab dua qhov viscosity, qhov dej tuav tau zoo dua. Txawm li cas los xij, qhov siab dua qhov viscosity, siab dua molecular hnyav ntawm HPMC, thiab qis solubility ntawm HPMC, uas muaj kev cuam tshuam tsis zoo rau lub zog thiab kev tsim kho ntawm mortar. Qhov siab dua qhov viscosity, qhov pom tseeb dua cov nyhuv ntawm cov tshuaj khib nyiab, tab sis nws tsis cuam tshuam ncaj qha. Qhov siab dua qhov viscosity, qhov nplaum nplaum ntub dej ntau dua, kev tsim kho zoo, kev ua haujlwm ruaj khov thiab ua haujlwm siab adhesion rau substrate. Txawm li cas los xij, kev txhim kho ntawm cov txheej txheem lub zog ntawm cov mortar ntub nws tus kheej tsis pab. Ob qho tib si kev tsim kho, qhov kev ua tau zoo tsis pom tseeb los tiv thaiv kev ua haujlwm dai. Hauv qhov sib piv, qee qhov nruab nrab thiab qis viscosity tab sis hloov kho hydroxypropyl methylcellulose muaj kev ua tau zoo hauv kev txhim kho lub zog ntawm cov khoom ntub dej.
Qhov ntau dua ntawm cellulose ether PMC ntub mortar ntxiv, qhov zoo dua cov dej tuav, qhov siab dua qhov viscosity, qhov dej tuav tau zoo dua. Fineness kuj yog ib qho tseem ceeb Performance index ntawm hydroxypropyl methyl cellulose.
Qhov zoo ntawm hydroxypropyl methyl cellulose kuj muaj qee yam cuam tshuam rau nws cov dej tuav. Nyob rau hauv ib txwm muaj xwm txheej, tib viscosity thiab sib txawv fineness ntawm hydroxypropyl methyl cellulose, nyob rau hauv tib qhov sib ntxiv, qhov me me qhov zoo ntawm cov dej tuav tau zoo dua.
Nyob rau hauv ntub mortar, ntxiv ntawm cellulose etherHPMCtsawg heev, tab sis nws tuaj yeem txhim kho kev tsim kho kev ua haujlwm ntawm mortar ntub, yog lub ntsiab additive uas feem ntau cuam tshuam rau kev ua haujlwm ntawm mortar. Kev ua tau zoo ntawm cov khib nyiab ntub dej yog cuam tshuam los ntawm kev xaiv tsim nyog ntawm hydroxypropyl methyl cellulose