HPMC (hydroxypropyl methylcellulose) yog ib qho tshuaj ntxiv uas siv tau ntau yam hauv kev tsim kho, tshwj xeeb tshaj yog hauv kev txhim kho kev ua haujlwm ntawm lub tsev. Kev siv HPMC ua rau cov khoom siv hauv tsev muaj cov khoom zoo heev thaum lub sijhawm tsim kho thiab siv mus sij hawm ntev.
1. Cov yam ntxwv tseem ceeb thiab cov txheej txheem ntawm kev ua haujlwm ntawm HPMC
HPMC yog ib qho polymer semi-synthetic tau los ntawm cov nroj tsuag cellulose ntuj los ntawm kev ua tshuaj lom neeg. Nws cov qauv tshuaj lom neeg yooj yim ua rau nws khaws dej zoo, muaj peev xwm hloov kho viscosity, cov yam ntxwv tsim zaj duab xis, tiv taus shrinkage thiab lwm yam ntxwv. Cov yam ntxwv no ua rau nws tseem ceeb tshwj xeeb hauv kev lag luam kev tsim kho. Lub luag haujlwm ntawm HPMC yog ua rau hauv cov hauv qab no:
Kev khaws dej: HPMC muaj peev xwm khaws dej zoo heev, uas tuaj yeem txo qhov kev ua kom dej noo thiab xyuas kom muaj kev sib xyaw ua ke ntawm cov cement thiab mortar thaum lub sijhawm ua kom tawv. Kev sib xyaw ua ke kom zoo tsis yog tsuas yog txhim kho lub zog ntawm cov khoom siv xwb, tab sis kuj txo qhov tshwm sim ntawm cov kab nrib pleb.
Cov khoom sib txuas: Ua ib qho thickener thiab stabilizer, HPMC tuaj yeem txhim kho cov khoom sib txuas ntawm cov ntaub ntawv tsim kho. Nws cov nyhuv thickening ua rau mortar, putty, xim thiab lwm yam khoom sib xws dua thaum lub sijhawm tsim kho, ua rau lawv yooj yim kis thiab tsis tshua muaj feem yuav sag.
Kev ua tau zoo dua ntawm kev tsim kho: HPMC tuaj yeem txhim kho kev ua tau zoo ntawm cov khoom siv hauv tsev los ntawm kev kho lawv qhov sib xws. Thaum lub sijhawm tsim kho, HPMC tuaj yeem txhim kho qhov yooj yim thiab kev ua haujlwm ntawm cov khoom siv, ncua lub sijhawm qhib, thiab pab cov neeg ua haujlwm kho qhov kev nce qib ntawm kev tsim kho.
Tiv Thaiv Kev Qaug Zog: HPMC ua rau kom muaj kev sib koom ua ke ntawm cov ntaub ntawv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov dav hlau ntsug lossis cov tsev siab, tiv thaiv cov ntaub ntawv kom tsis txhob qaug zog vim yog lub ntiajteb txawj nqus thiab xyuas kom meej qhov tseeb ntawm kev tsim kho.
2. Daim ntawv thov ntawm HPMC hauv cov ntaub ntawv tsim kho sib txawv
HPMC siv dav hauv ntau yam khoom siv hauv tsev, thiab cov khoom siv hauv tsev sib txawv muaj cov kev xav tau sib txawv thiab cov txheej txheem ua haujlwm rau HPMC. Lub luag haujlwm ntawm HPMC yuav raug tham hauv qab no los ntawm ntau yam khoom siv hauv tsev.
2.1 Cov tshuaj cement
Hauv cov cement mortars, lub luag haujlwm tseem ceeb ntawm HPMC yog los txhim kho kev khaws dej thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Nws ua rau qeeb qeeb ntawm kev ua kom cov dej noo kom cov cement muaj dej txaus thaum lub sijhawm ua kom noo los tsim kom muaj zog thiab ruaj khov dua. Tsis tas li ntawd, kev siv HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov mortar, ua rau nws yooj yim dua rau cov neeg ua haujlwm tsim kho kom ua tiav kev khawb thiab ua kom du.
2.2 Cov nplaum rau pobzeb
Cov nplaum rau cov vuas pobzeb ceramic xav tau cov khoom sib txuas zoo thiab tiv taus kev plam, thiab HPMC ua lub luag haujlwm tseem ceeb hauv qhov no. Los ntawm kev ua kom cov nplaum ntawm cov vuas pobzeb viscosity nce ntxiv, HPMC tuaj yeem tiv thaiv cov vuas pobzeb kom tsis txhob swb vim yog lub ntiajteb txawj nqus tom qab siv. Tsis tas li ntawd, HPMC tuaj yeem txhim kho qhov ntub thiab ua haujlwm tau ntawm cov nplaum pobzeb, kom ntseeg tau tias cov vuas pobzeb tau ruaj khov zoo dua thaum lub sijhawm tsim kho.
2.3 Pem teb uas nws tus kheej leveled
Hauv cov plag tsev uas nws tus kheej leveling, HPMC yog siv los kho qhov fluidity ntawm cov khoom kom nws tuaj yeem tsim ib qho chaw tiaj tus thaum muab tso rau hauv thiab zam kev tsim cov pa npuas. HPMC ua kom muaj qhov zoo tagnrho ntawm cov khoom uas nws tus kheej leveling hauv lub sijhawm luv luv thiab ua kom lawv tsis kam hnav thiab tawg.
2.4 Cov hmoov av
Ua ib yam khoom siv kho kom zoo nkauj rau phab ntsa, cov hmoov putty yuav tsum muaj kev nplaum zoo, tiaj tus thiab du. Lub luag haujlwm ntawm HPMC hauv cov hmoov putty yog los muab cov viscosity thiab dej kom txaus kom tiv thaiv cov putty kom tsis txhob qhuav ua ntej thiab ua rau muaj kab nrib pleb lossis poob hmoov thaum lub sijhawm tsim kho. Los ntawm kev siv HPMC, cov hmoov putty lo rau ntawm phab ntsa zoo dua, tsim kom muaj txheej txheej du thiab sib npaug.
2.5 Lub tshuab rwb thaiv tsev phab ntsa sab nraud
Hauv cov txheej txheem rwb thaiv tsev phab ntsa sab nraud, HPMC tuaj yeem txhim kho lub zog ntawm cov tshuaj nplaum sib txuas thiab xyuas kom meej tias muaj kev sib txuas zoo ntawm lub rooj tsavxwm rwb thaiv tsev thiab phab ntsa. Tib lub sijhawm, nws cov dej khaws cia kuj tseem tuaj yeem tiv thaiv cov tshuaj nplaum kom tsis txhob qhuav sai dhau, ntev nws lub sijhawm qhib, thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Tsis tas li ntawd, HPMC tuaj yeem txhim kho kev tiv thaiv huab cua thiab kev laus ntawm cov khoom siv, txuas ntxiv lub neej kev pabcuam ntawm cov txheej txheem rwb thaiv tsev phab ntsa sab nraud.
3. Lub zog tseem ceeb ntawm HPMC hauv kev txhim kho kev ua haujlwm ntawm lub tsev
3.1 Txhim kho qhov ruaj khov ntawm cov ntaub ntawv siv hauv tsev
Los ntawm kev tswj cov txheej txheem hydration ntawm cov ntaub ntawv tsim kho kom zoo, HPMC ua rau cov khoom siv muaj zog thiab ruaj khov dua. Nws tsis tsuas yog txo qhov tshwm sim ntawm cov kab nrib pleb xwb, tab sis nws tseem tiv thaiv kev puas tsuaj ntawm cov ntaub ntawv tsim kho los ntawm kev poob dej noo. Thaum siv mus sij hawm ntev, HPMC kuj muaj cov khoom zoo tiv thaiv kev laus thiab tuaj yeem ua kom lub tsev siv tau ntev dua.
3.2 Txhim kho kev ua haujlwm zoo ntawm cov ntaub ntawv siv hauv tsev
Qhov kev txav mus los zoo heev thiab kev txav mus los uas HPMC muab ua rau cov neeg ua haujlwm tsim kho yooj yim dua thaum lub sijhawm tsim kho. Tshwj xeeb tshaj yog thaum tsim kho thaj chaw loj, qhov sib xws thiab kev ywj pheej ntawm cov ntaub ntawv tseem ceeb heev. Los ntawm kev ncua sijhawm qhib, HPMC tso cai rau cov neeg ua haujlwm tsim kho thaum so thiab txo qhov ua tau ntawm kev rov ua haujlwm thiab kho, yog li txhim kho kev ua haujlwm zoo heev.
3.3 Txhim kho qhov zoo ntawm cov khoom siv hauv tsev
Hauv kev tsim phab ntsa thiab hauv pem teb, HPMC pab tsim kom muaj qhov chaw du thiab sib npaug, zam kev tsis zoo uas tshwm sim los ntawm kev qhuav tsis sib xws lossis cov khoom poob qis. HPMC yog ib qho khoom siv ntxiv rau cov khoom siv hauv tsev zoo uas xav tau kev tsim kho kom raug. Nws cov yam ntxwv ua zaj duab xis ua kom cov khoom siv tuaj yeem tsim ib txheej tiv thaiv ntom ntom tom qab kho, ua kom zoo nkauj thiab ua haujlwm ntawm cov khoom siv hauv tsev.
4. Tus nqi tiv thaiv ib puag ncig ntsuab ntawm HPMC
Ntxiv rau kev txhim kho kev ua haujlwm ntawm lub tsev, HPMC kuj muaj txiaj ntsig zoo rau ib puag ncig. Raws li cov khoom siv los ntawm cov cellulose ntuj, HPMC yog tus phooj ywg ib puag ncig thiab ua raws li qhov kev hloov pauv niaj hnub no ntawm kev txhim kho ntsuab thiab kev ruaj khov hauv kev lag luam kev tsim kho. Nws siv txo qhov xav tau cov tshuaj khi, yog li txo cov pa roj phem. Tsis tas li ntawd, kev ua haujlwm zoo ntawm HPMC kuj txo cov khoom pov tseg thiab cov nqi rov ua haujlwm, pab txhawb rau kev txuag hluav taws xob thiab txo cov pa phem hauv kev lag luam kev tsim kho.
Kev siv HPMC dav dav hauv kev tsim kho muab cov kev daws teeb meem txhim khu kev qha rau kev txhim kho kev ua tau zoo ntawm cov ntaub ntawv tsim kho. Los ntawm kev txhim kho kev khaws cia dej, txhim kho kev nplaum, thiab ua kom kev tsim kho zoo dua, HPMC txhim kho qhov zoo thiab kev ruaj khov ntawm cov ntaub ntawv tsim kho. Tsis tas li ntawd, ua ib qho khoom siv ntsuab thiab zoo rau ib puag ncig, HPMC muaj peev xwm tseem ceeb hauv kev txhim kho kev lag luam tsim kho yav tom ntej. Yav tom ntej, nrog rau kev tsim kho tshiab tas mus li ntawm cov thev naus laus zis siv hauv kev tsim kho, qhov kev siv thiab kev txhim kho kev ua tau zoo ntawm HPMC yuav txhawb nqa kev nce qib ntawm kev lag luam tsim kho.
Lub sijhawm tshaj tawm: Cuaj hlis-12-2024