Hydroxypropyl methylcellulose (HPMC)yog ib qho tshuaj polymer organic siv dav hauv cov ntaub ntawv tsim kho, tshwj xeeb tshaj yog hauv cov mortars, coatings, adhesives thiab lwm yam khoom. Lub luag haujlwm tseem ceeb ntawm HPMC admixture yog los txhim kho kev ua haujlwm ntawm mortar, txhim kho kev khaws dej thiab ntev lub sijhawm qhib. Raws li qhov kev thov rau cov ntaub ntawv ua tau zoo hauv kev lag luam kev tsim kho txuas ntxiv mus, daim ntawv thov ntawm HPMC tau txais kev saib xyuas dav dav.
1. Cov khoom tseem ceeb ntawm HPMC
HPMC yog cov cellulose ether uas yaj tau hauv dej nrog cov khoom zoo rau kev noo, kev nplaum thiab kev tuab. Nws tuaj yeem txhim kho qhov khaws dej ntawm cov mortar, ntev lub sijhawm qhib, thiab txhim kho qhov kev tiv thaiv sag thiab kev ua haujlwm ntawm cov mortar. Cov yam ntxwv zoo no ua rau HPMC yog ib qho ntawm cov admixtures feem ntau hauv cov mortar thiab lwm yam khoom siv hauv tsev.
2. Cov txheej txheem ziab ntawm cov mortar
Cov txheej txheem ziab ntawm cov cement feem ntau muaj ob ntu: kev ua kom dej noo thiab cov tshuaj tiv thaiv cement hydration. Cement hydration yog lub hauv paus tseem ceeb rau kev kho cov cement, tab sis kev ua kom dej noo thaum lub sijhawm ziab kuj ua lub luag haujlwm tseem ceeb. Cov dej noo hauv cov cement mortar yuav tsum tau maj mam tshem tawm los ntawm cov txheej txheem evaporation, thiab qhov ceev ntawm cov txheej txheem no cuam tshuam ncaj qha rau qhov zoo, kev ruaj khov thiab kev ua haujlwm tom qab ntawm cov khoom tiav tom qab kev tsim kho.
3. Cov nyhuv ntawm HPMC rau kev ziab mortar ceev
Qhov cuam tshuam ntawm AnxinCel®HPMC admixture rau qhov ceev ntawm cov mortar ziab feem ntau yog pom tseeb hauv ob qho: kev khaws dej thiab kev tswj dej evaporation.
(1) Txhim kho kev khaws dej thiab qeeb qeeb kom qhuav
HPMC muaj cov khoom ua kom noo thiab khaws dej tau zoo. Nws tuaj yeem tsim cov zaj duab xis hydration hauv cov mortar kom txo qhov dej evaporation sai. Qhov zoo dua qhov khaws dej ntawm cov mortar, qhov qeeb dua nws qhuav vim tias cov dej khaws cia hauv cov mortar ntev dua. Yog li ntawd, tom qab ntxiv HPMC, cov txheej txheem evaporation ntawm cov dej hauv cov mortar yuav raug txwv rau qee qhov, ua rau lub sijhawm qhuav ntev.
Txawm hais tias kev ua kom qeeb qeeb ntawm cov dej noo yuav ua rau lub sijhawm qhuav ntawm cov xuab zeb ntev dua, cov txheej txheem ziab qeeb no muaj txiaj ntsig zoo, tshwj xeeb tshaj yog thaum lub sijhawm tsim kho, vim nws tuaj yeem tiv thaiv cov teeb meem xws li qhov chaw qhuav thiab cov xuab zeb tawg thiab ua kom zoo ntawm kev tsim kho.
(2) Kev kho cov txheej txheem cement hydration
Lub luag haujlwm ntawm HPMC hauv cov cement mortar tsis yog tsuas yog txhim kho kev khaws dej xwb. Nws kuj tseem tuaj yeem tswj cov txheej txheem hydration ntawm cement. Los ntawm kev hloov pauv rheology ntawm mortar, HPMC tuaj yeem cuam tshuam rau qib kev sib cuag ntawm cov cement me me thiab cov dej noo, yog li cuam tshuam rau qhov nrawm ntawm hydration ntawm cement. Hauv qee kis, ntxiv AnxinCel®HPMC yuav qeeb me ntsis cov txheej txheem hydration ntawm cement, ua rau cov mortar kho qeeb dua. Cov nyhuv no feem ntau yog ua tiav los ntawm kev kho qhov loj me ntawm cov cement me me thiab kev sib cuag ntawm cov cement me me, yog li cuam tshuam rau qhov ceev ziab.
(3) Kev hloov kho kom haum rau cov av noo ib puag ncig
HPMC tuaj yeem txhim kho qhov tsis kam ntawm cov mortar, ua rau cov mortar hloov pauv tau yooj yim rau cov av noo ib puag ncig. Hauv qhov chaw qhuav, qhov cuam tshuam ntawm kev khaws dej ntawm HPMC yog qhov tseem ceeb heev. Nws tuaj yeem ncua qhov poob ntawm cov dej noo ntawm qhov chaw thiab txo cov kab nrib pleb ntawm qhov chaw uas tshwm sim los ntawm kev ziab sai dhau. Qhov no tseem ceeb heev hauv qhov chaw kub lossis qhuav. Yog li ntawd, HPMC tsis yog tsuas yog kho qhov nrawm ntawm cov dej evaporation xwb, tab sis kuj txhim kho qhov kev hloov pauv ntawm cov mortar rau qhov chaw sab nraud, tsis ncaj qha ncua lub sijhawm ziab.
4. Tej yam uas cuam tshuam rau qhov ceev ntawm kev ziab
Ntxiv rau qhov ntxiv ntawm HPMC admixture, qhov ceev ziab ntawm mortar kuj tseem cuam tshuam los ntawm ntau lwm yam, suav nrog:
Qhov piv ntawm cov cement rau dej thiab qhov piv ntawm cov pob zeb me me rau cov pob zeb loj yuav cuam tshuam rau cov dej noo ntawm cov mortar thiab yog li qhov ceev ntawm kev ziab.
Tej yam ib puag ncig: Qhov kub thiab txias, av noo thiab huab cua ncig yog cov yam tseem ceeb uas cuam tshuam rau qhov ceev ntawm cov mortar qhuav. Hauv ib puag ncig uas muaj qhov kub thiab txias thiab av noo tsawg, dej yuav ua pa sai dua, thiab rov qab ua dua.
Qhov tuab ntawm cov pob zeb mortar: Qhov tuab ntawm cov pob zeb mortar cuam tshuam ncaj qha rau nws cov txheej txheem ziab. Cov pob zeb screed tuab feem ntau siv sijhawm ntev dua kom qhuav tag.
5. Kev xav txog kev siv ua haujlwm
Hauv kev siv ua haujlwm, cov kws ua haujlwm tsim kho thiab cov neeg ua haujlwm tsim kho feem ntau yuav tsum sib npaug qhov ceev ntawm cov mortar kom qhuav nrog rau qhov ua haujlwm tau ntawm kev tsim kho. Ua ib qho admixture, HPMC tuaj yeem ncua qhov ceev ntawm kev ziab, tab sis qhov no muaj txiaj ntsig zoo rau cov chaw uas yuav tsum tau tswj lub sijhawm tsim kho. Piv txwv li, nyob rau hauv qhov kub siab, qhov chaw qhuav cua, HPMC tuaj yeem tiv thaiv qhov chaw qhuav thiab tawg, ua kom ntseeg tau tias kev ua haujlwm zoo dua thiab lub sijhawm qhib ntev dua ntawm cov mortar thaum lub sijhawm tsim kho.
Txawm li cas los xij, qee qhov xwm txheej tshwj xeeb, xws li cov haujlwm uas xav tau kom qhuav sai ntawm cov mortar, nws yuav tsim nyog los tswj qhov ntau ntawmHPMCntxiv lossis xaiv cov mis uas tsis muaj HPMC kom ua kom cov txheej txheem ziab sai dua.
Ua ib qho tshuaj sib xyaw ua ke ntawm cov pob zeb, AnxinCel® HPMC tuaj yeem txhim kho qhov khaws dej ntawm cov pob zeb, ncua lub sijhawm qhib, thiab cuam tshuam tsis ncaj qha rau qhov ceev ntawm cov pob zeb kom qhuav. Tom qab ntxiv HPMC, qhov ceev ntawm cov pob zeb kom qhuav feem ntau qeeb qeeb, uas muaj txiaj ntsig zoo rau kev zam cov teeb meem xws li kev tawg qhuav thaum lub sijhawm tsim kho. Txawm li cas los xij, kev hloov pauv ntawm qhov ceev ntawm kev ziab kuj raug cuam tshuam los ntawm ntau yam xws li qhov sib piv ntawm cov pob zeb thiab cov xwm txheej ib puag ncig. Yog li ntawd, hauv kev siv tiag tiag, qhov ntau ntawm HPMC yuav tsum tau xaiv raws li cov xwm txheej tshwj xeeb kom ua tiav qhov zoo tshaj plaws ntawm kev tsim kho.
Lub sijhawm tshaj tawm: Lub Ib Hlis-10-2025