Hydroxypropyl methylcellulose ether (HPMC) tau dhau los ua ib qho khoom siv tseem ceeb rau cov cement-based mortar vim nws cov khoom zoo heev thiab qhov zoo. HPMC yog ib qho cellulose ether hloov kho tau los ntawm kev kho cellulose nrog propylene oxide thiab methyl chloride. Nws yog ib qho hmoov dawb lossis dawb uas yaj hauv dej kom ua rau cov kua nplaum ntshiab.
Qhov ntxiv HPMC rau hauv cov cement-based mortars muaj qhov zoo ntawm kev ua haujlwm tau zoo dua, khaws dej tau zoo, teeb tsa lub sijhawm thiab muaj zog dua. Nws kuj tseem txhim kho kev lo rau mortar rau lub substrate thiab txo cov kab nrib pleb. HPMC yog tus phooj ywg ib puag ncig, muaj kev nyab xeeb siv thiab tsis muaj tshuaj lom.
Txhim kho kev ua haujlwm tau zoo
Qhov muaj HPMC nyob rau hauv cov cement-based mortars ua rau qhov sib xyaw ua ke ntau dua, ua rau nws yooj yim dua rau kev tsim kho thiab nthuav dav. Lub peev xwm khaws dej siab ntawm HPMC ua rau cov mortar ua haujlwm tau ntev. Qhov no tseem ceeb heev rau huab cua kub thiab qhuav uas cov txheej txheem kev tsim kho tuaj yeem nyuaj.
Kev khaws dej
HPMC pab khaws cov dej noo hauv cov sib tov rau lub sijhawm ntev dua. Qhov no tseem ceeb heev vim tias dej yog ib qho tseem ceeb hauv kev ua kom cov cement khov thiab ua kom nws muaj zog thiab ruaj khov. Lub peev xwm tuav dej ntau ntxiv yog qhov tshwj xeeb tshaj yog nyob rau hauv thaj chaw uas muaj av noo tsawg lossis kub siab, qhov twg dej hauv cov mortar tuaj yeem ua pa sai.
teem sijhawm
HPMC kho lub sijhawm teeb tsa ntawm cov cement-based mortar los ntawm kev tswj qhov ceev ntawm cov cement. Qhov no ua rau muaj sijhawm ua haujlwm ntev dua, muab sijhawm txaus rau cov neeg ua haujlwm los thov thiab kho cov mortar ua ntej nws teeb tsa. Nws kuj tseem ua rau muaj kev ua tau zoo dua nyob rau ntau qhov chaw sib txawv.
Kev siv zog ntau ntxiv
Qhov ntxiv ntawm HPMC txhawb nqa kev tsim cov txheej hydrate zoo, yog li ua kom lub zog thiab lub zog ntawm cov cement-based mortar zoo dua. Qhov no yog vim qhov tuab ntawm cov txheej uas tsim nyob ib puag ncig cov cement clinker. Cov qauv tsim nyob rau hauv cov txheej txheem no ruaj khov dua, yog li ua kom lub peev xwm ntawm cov mortar zoo dua.
Txhim kho kev sib txuas
Qhov muaj HPMC nyob rau hauv cov cement-based mortars txhim kho qhov kev sib txuas ntawm cov mortar thiab lub substrate. Qhov no yog vim HPMC lub peev xwm los sib txuas nrog cement thiab substrate los tsim kom muaj kev sib txuas zoo. Yog li ntawd, qhov tshwm sim ntawm cov mortar tawg lossis sib cais ntawm lub substrate raug txo qis heev.
Txo qhov tawg
Siv HPMC hauv cov cement-based mortars ua rau muaj kev ywj pheej ntau dua thiab txo qhov yuav tawg. Qhov no yog vim muaj cov txheej hydrate zoo uas tso cai rau cov mortar kom tiv taus kev tawg los ntawm kev nqus kev ntxhov siab thiab nthuav dav lossis cog lus raws li. HPMC kuj txo qhov shrinkage, lwm qhov ua rau tawg hauv cov cement-based mortars.
HPMC yog ib qho tshuaj ntxiv uas tsis ua rau ib puag ncig puas tsuaj thiab tsis muaj tshuaj lom uas ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm cov cement-based mortars. Nws cov txiaj ntsig ntau dua li nws cov nqi, thiab nws siv tau nrov zuj zus hauv kev lag luam kev tsim kho. Nws lub peev xwm los txhim kho kev ua haujlwm tau zoo, khaws dej, teeb tsa lub sijhawm, nce lub zog, txhim kho kev nplaum thiab txo qhov tawg ua rau nws yog ib feem tseem ceeb ntawm kev siv niaj hnub no.
Lub sijhawm tshaj tawm: Cuaj hlis-20-2023