Raws li ib qho ntawm cov cellulose ether admixtures tseem ceeb hauv cov hmoov qhuav mortar, hydroxypropyl methylcellulose muaj ntau lub luag haujlwm hauv mortar. Lub luag haujlwm tseem ceeb tshaj plaws ntawm hydroxypropyl methylcellulose hauv cement mortar yog kev khaws dej thiab thickening. Tsis tas li ntawd, vim nws cuam tshuam nrog lub cev cement, nws kuj tuaj yeem ua lub luag haujlwm pabcuam hauv kev nkag mus rau huab cua, ncua kev teeb tsa, thiab txhim kho lub zog tensile.
Qhov kev ua tau zoo tshaj plaws ntawm hydroxypropyl methylcellulose hauv mortar yog kev khaws dej. Raws li cellulose ether admixture hauv mortar, hydroxypropyl methylcellulose tuaj yeem siv rau hauv yuav luag txhua yam khoom mortar, feem ntau yog vim nws cov dej khaws cia. Feem ntau hais lus, qhov kev khaws dej ntawm hydroxypropyl methylcellulose yog cuam tshuam nrog nws cov viscosity, qib ntawm kev hloov pauv thiab qhov loj me ntawm cov khoom me me.
Hydroxypropyl methylcellulose siv ua cov khoom tuab, thiab nws cov nyhuv tuab yog cuam tshuam nrog qib ntawm kev hloov pauv, qhov loj me ntawm cov khoom me me, viscosity thiab qib kev hloov pauv ntawm hydroxypropyl methylcellulose. Feem ntau hais lus, qhov siab dua ntawm qib kev hloov pauv thiab viscosity ntawm cellulose ether, thiab cov khoom me me, qhov pom tseeb dua qhov cuam tshuam tuab.
Hauv hydroxypropyl methylcellulose, kev qhia txog methoxy pawg txo qhov zog ntawm cov kua dej uas muaj hydroxypropyl methylcellulose, yog li ntawd hydroxypropyl methylcellulose muaj cov nyhuv cua-entraining rau ntawm cement mortar. Qhia cov pa npuas kom zoo hauv cov mortar, vim yog "pob nyhuv" ntawm cov pa npuas,
Qhov kev ua tau zoo ntawm cov mortar tau zoo dua, thiab tib lub sijhawm, kev nkag mus rau hauv cov pa npuas ua rau cov mortar tso tawm ntau dua. Tau kawg, qhov ntau ntawm cov cua nkag yuav tsum tau tswj. Kev nkag ntau dhau yuav muaj kev cuam tshuam tsis zoo rau lub zog ntawm cov mortar.
Hydroxypropyl methylcellulose yuav ncua qhov txheej txheem teeb tsa ntawm cov cement, yog li ua rau qeeb qeeb qhov txheej txheem teeb tsa thiab tawv ntawm cov cement, thiab ua kom lub sijhawm qhib ntawm cov mortar ntev dua, tab sis qhov cuam tshuam no tsis zoo rau cov mortar hauv thaj chaw txias dua.
Ua ib yam khoom siv polymer ntev, hydroxypropyl methylcellulose tuaj yeem txhim kho kev sib txuas nrog lub substrate tom qab ntxiv rau hauv lub kaw lus cement raws li lub hauv paus ntawm kev tswj hwm cov dej noo hauv cov slurry.
Hauv kev xaus lus, kev ua tau zoo ntawmHPMCHauv cov tshuaj khib feem ntau suav nrog: kev khaws dej, thickening, ntev lub sijhawm teeb tsa, entraining huab cua thiab txhim kho tensile bond zog, thiab lwm yam.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-19-2022