Hydroxypropyl Methylcellulose (HPMC) yog ib qho cellulose ether uas feem ntau siv rau hauv ntau yam lag luam, suav nrog kev tsim kho, tshuaj, khoom noj, thiab tshuaj pleev ib ce. Hauv kev tsim kho, HPMC feem ntau siv ua cov khoom ntxiv rau hauv cov mortar vim nws muaj peev xwm txhim kho ntau yam khoom ntawm cov mortar sib tov, suav nrog kev ua haujlwm tau zoo, kev khaws dej, thiab kev nplaum. Ib qho ntawm cov yam tseem ceeb ntawm kev ua tau zoo ntawm mortar yog nws lub zog, thiab HPMC tuaj yeem cuam tshuam rau cov yam ntxwv ntawm cov mortar sib tov.
Ua ntej tshaj, nws yog ib qho tseem ceeb kom nkag siab txog cov khoom sib xyaw ntawm cov pob zeb mortar thiab lub luag haujlwm ntawm ntau yam khoom xyaw hauv kev txiav txim siab nws lub zog. Pob zeb mortar yog kev sib xyaw ntawm cov khoom siv cementitious (xws li Portland cement), cov pob zeb sib xyaw (xws li xuab zeb), dej, thiab cov khoom ntxiv. Lub zog ntawm cov pob zeb mortar feem ntau nyob ntawm qhov dej ntawm cov cement me me, uas tsim cov matrix khi cov pob zeb sib xyaw ua ke. Txawm li cas los xij, ntau yam, suav nrog qhov sib piv ntawm dej-cement, kev sib xyaw ua ke, thiab qhov muaj cov khoom ntxiv, tuaj yeem cuam tshuam rau kev txhim kho lub zog ntawm cov pob zeb mortar.
HPMC feem ntau yog ntxiv rau hauv cov sib tov mortar ua tus neeg sawv cev khaws dej thiab ua kom tuab. Nws txhim kho kev ua haujlwm los ntawm kev txhim kho qhov sib xyaw ua ke, txo qhov sagging lossis slumping, thiab tso cai rau kev siv zoo dua ntawm cov chaw ntsug. Tsis tas li ntawd, HPMC tsim ib daim zaj duab xis nyob ib puag ncig cov cement me me, uas pab khaws dej thiab ua kom cov cement noo ntev, ua rau muaj kev txhim kho lub zog zoo dua dhau sijhawm.
Ib qho ntawm txoj kev tseem ceeb uas HPMC cuam tshuam rau lub zog ntawm cov mortar yog los ntawm kev txo cov dej poob los ntawm kev ua pa thaum lub sijhawm teeb tsa thiab kho. Los ntawm kev tsim cov zaj duab xis tiv thaiv rau ntawm qhov chaw ntawm cov cement, HPMC txo qhov ceev uas cov dej ua pa los ntawm cov mortar sib xyaw. Qhov kev ua kom noo noo ntev ntawm cov cement ua rau muaj kev ua kom noo noo ntau dua thiab sib xws, ua rau cov mortar matrix denser thiab muaj zog dua. Yog li ntawd, cov mortars uas muaj HPMC feem ntau ua rau muaj zog compressive thiab flexural ntau dua piv rau cov uas tsis muaj nws, tshwj xeeb tshaj yog thaum muaj hnub nyoog tom qab.
Ntxiv mus, HPMC tuaj yeem ua haujlwm ua tus neeg sawv cev rau kev sib kis, txhawb kev faib cov khoom sib xyaw ntawm cov cement thiab lwm yam khoom ntxiv thoob plaws hauv cov mortar sib xyaw. Qhov kev faib tawm no pab ua kom muaj zog sib xws thoob plaws tag nrho cov mortar. Tsis tas li ntawd, HPMC tuaj yeem txhim kho qhov kev sib txuas ntawm mortar rau ntau yam substrates, xws li masonry units lossis vuas, ua rau muaj zog sib txuas zoo dua.
Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov cuam tshuam ntawm HPMC rau lub zog ntawm cov mortar tuaj yeem sib txawv nyob ntawm ntau yam, suav nrog qhov ntau npaum li cas ntawm HPMC, hom thiab qhov ntau npaum li cas ntawm lwm cov khoom ntxiv uas muaj nyob hauv qhov sib tov, cov yam ntxwv ntawm cov cement thiab cov aggregates siv, cov xwm txheej ib puag ncig thaum sib tov, tso, thiab kho, nrog rau cov kev cai tshwj xeeb ntawm daim ntawv thov.
Txawm hais tias HPMC feem ntau ua rau lub zog ntawm cov mortar nce ntxiv, kev siv ntau dhau lossis kev siv tshuaj HPMC tsis raug tuaj yeem muaj cov teebmeem tsis zoo. Kev muaj ntau ntawm HPMC tuaj yeem ua rau muaj huab cua ntau dhau, ua haujlwm tsis zoo, lossis lub sijhawm teeb tsa qeeb, uas tuaj yeem cuam tshuam tsis zoo rau kev ua haujlwm ntawm cov mortar. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum xav txog qhov ntau npaum li cas ntawm HPMC thiab lwm yam khoom ntxiv raws li qhov xav tau tshwj xeeb ntawm qhov project thiab ua qhov kev sim kom zoo kom zoo dua cov mortar sib xyaw rau lub zog thiab kev ua tau zoo xav tau.
Hydroxypropyl Methylcellulose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev txhim kho lub zog ntawm cov khoom sib xyaw ua ke siv hauv kev siv hauv kev tsim kho. Los ntawm kev txhim kho kev khaws cia dej, kev ua haujlwm tau zoo, thiab kev nplaum, HPMC pab txhawb kev ua kom cov cement noo zoo dua, ua rau cov khoom sib xyaw ua ke ntom dua thiab muaj zog dua. Txawm li cas los xij, kev noj tshuaj kom raug thiab kev xav txog lwm yam khoom sib xyaw yog qhov tseem ceeb los siv tag nrho lub peev xwm ntawm HPMC thaum zam kev cuam tshuam. Zuag qhia tag nrho, HPMC ua haujlwm ua cov khoom ntxiv muaj txiaj ntsig zoo hauv kev txhim kho kev ua tau zoo ntawm cov khoom sib xyaw ua ke, pab txhawb rau kev ruaj khov thiab kev ntseeg siab ntawm cov haujlwm tsim kho.
Lub sijhawm tshaj tawm: Lub Rau Hli-04-2024