HPMC (hydroxypropyl methylcellulose) yog ib qho tshuaj ntxiv rau hauv kev tsim kho kev lag luam thiab tau siv dav hauv mortar thiab lwm yam khoom siv cement. Nws muaj ntau yam kev ua haujlwm thiab tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim mortar, tshwj xeeb tshaj yog hauv kev txhim kho cov dej tuav, kev ua haujlwm thiab kev ua haujlwm ntawm mortar.
1. Txhim khu kev tuav dej
Ib qho txiaj ntsig tseem ceeb tshaj plaws ntawm HPMC yog nws cov dej tuav tau zoo. Nyob rau hauv mortar mix, volatilization thiab poob dej yuav cuam tshuam lub zog, adhesion thiab workability ntawm mortar. Los ntawm kev ntxiv HPMC, cov dej tuav lub peev xwm ntawm mortar tau txhim kho zoo heev, txo cov dej tsis zoo. HPMC molecules yog hydrophilic, thiab nws muaj peev xwm tsim ib tug nyias zaj duab xis nyob rau hauv lub mortar los tiv thaiv ntxov ntxov evaporation ntawm dej, yog li xyuas kom meej tias cement muaj txaus hydration lub sij hawm thaum lub sij hawm kho.
Txhim kho dej tuav tau cov txiaj ntsig hauv qab no rau mortar:
Txo kev tawg: Kev poob dej sai sai yuav ua rau cov tshuaj khib nyiab ntsws thaum lub sijhawm kho, yog li tsim cov kab nrib pleb. Kev tuav dej ntawm HPMC tuaj yeem tiv thaiv qhov tshwm sim ntawm qhov tshwm sim thiab txhim kho qhov tawg tsis kam ntawm mortar.
Txhim kho kev sib raug zoo: Qhov zoo ntawm cov tshuaj tiv thaiv hydration tuaj yeem ua ke cov khoom cement zoo dua nrog lwm cov ntaub ntawv (xws li cib, vuas, thiab lwm yam), txhim kho kev sib txuas ntawm mortar.
Txhim kho kev tsim kho: Txij li HPMC tuaj yeem tswj qhov ntub dej ntawm mortar, cov neeg ua haujlwm tsim kho tuaj yeem sib kis tau yooj yim dua thaum siv nws, thaum tsis txhob muaj teeb meem los ntawm kev ziab ntxov ntawm mortar.
2. Txhim kho kev ua haujlwm thiab plasticity
Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho kev ua haujlwm ntawm mortar, ua kom yooj yim rau kev thov, sib kis thiab zoo li qub. Cov yam ntxwv no feem ntau yog vim cov nyhuv thickening ntawm HPMC ntawm cov tshuaj khib sib tov. Raws li cov thickener, HPMC tuaj yeem ua kom cov mortar sib xws thiab tsis txhob sib cais lossis cais tawm. Nyob rau hauv txoj kev tsim kho tiag tiag, niaj hnub thiab yooj yim-rau-siv mortar yuav txo tau kev tsim kho nyuaj thiab txhim kho efficiency.
Txhim kho plasticity: HPMC tuaj yeem txhim kho cov yas ntawm mortar los ntawm nws cov nyhuv thickening, ua rau cov mortar smoother thiab tsis tshua muaj sag thaum lub sij hawm thov. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum tsim kho ntawm qhov chaw ntsug. HPMC tuaj yeem pab khaws cov mortar txuas rau ntawm phab ntsa thiab txo cov khoom pov tseg.
Lub sijhawm qhib: HPMC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm mortar, muab sijhawm rau cov neeg ua haujlwm tsim kho thiab hloov kho, yog li zam kev tsim kho kom zoo cuam tshuam los ntawm kev kho ntxov ntxov ntawm mortar.
3. Txhim kho kev ua haujlwm tiv thaiv sagging
Thaum tsim tsa rau ntawm qhov chaw ntsug lossis qhov siab, lub mortar yog qhov cuam tshuam rau lub ntiajteb txawj nqus thiab tuaj yeem swb lossis sag, uas tsis tsuas yog cuam tshuam rau kev tsim kho, tab sis kuj tuaj yeem ua rau cov khoom pov tseg. Cov nyhuv thickening ntawm HPMC tuaj yeem txhim kho qhov kev ua haujlwm ntawm cov tshuaj khib nyiab. Los ntawm kev txhim kho cov viscosity ntawm mortar, HPMC tso cai rau lub mortar kom ruaj khov rau ntawm qhov chaw ntsug thiab tsis yooj yim rau swb vim nws qhov hnyav.
Qhov kev tiv thaiv sagging no yog qhov tseem ceeb tshwj xeeb hauv kev tsim kho qhov chaw ntsug xws li cov nplais nplaum lossis cov phab ntsa thaiv phab ntsa sab nrauv. HPMC tuaj yeem xyuas kom meej tias cov mortar tseem nyob hauv qhov chaw tom qab daim ntawv thov yam tsis muaj teeb meem sagging, ua kom lub tiaj tus thiab zoo nkauj ntawm kev tsim kho.
4. Txhim kho Frost tsis kam thiab huab cua tsis kam
Cov mortar yuav tsum muaj kev ruaj khov zoo nyob rau hauv cov huab cua sib txawv, tshwj xeeb tshaj yog nyob rau hauv cov huab cua txias, qhov chaw mortar feem ntau ntsib qhov kev sim ntawm cov voj voog khov-thaw. Yog hais tias lub mortar muaj qhov tsis zoo Frost tsis kam, dej yuav nthuav dav thaum nws khov, ua rau tawg hauv lub mortar. HPMC cov dej tuav thiab plasticity txhim kho lub mortar lub Frost tsis kam, tso cai rau nws kom muaj kev ntseeg ruaj khov nyob rau hauv qhov kub thiab txias.
HPMC kuj tseem tuaj yeem txhim kho cov mortar cov huab cua tiv thaiv, cia nws tiv thaiv cua thiab nag yaig thiab ultraviolet rays thaum raug rau sab nraud ib puag ncig ntev. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau sab nrauv phab ntsa mortar, pobzeb adhesives thiab lwm yam khoom siv hauv tsev uas raug rau ib puag ncig ntuj rau lub sijhawm ntev.
5. Txhim kho compressive zog thiab kav ntev
HPMC txhim kho lub mortar lub zog compressive thiab tag nrho cov kav ntev los ntawm kev txhim kho cov qauv sab hauv ntawm lub mortar. Ua ntej, HPMC kev txhim kho dej tuav kom ntseeg tau tias cov cement yog hydrated tag nrho, yog li txhim kho lub zog ntawm mortar. Qhov thib ob, HPMC txhim kho cov txheej txheem sab hauv ntawm lub mortar, txo cov npuas thiab cov hlab ntsha, uas tuaj yeem txo qhov kev pheej hmoo ntawm dej nkag thiab txhim kho kev ua haujlwm compressive.
HPMC kuj tseem tuaj yeem txhim kho qhov ua tau zoo ntawm cov mortar hauv qhov chaw ntub dej. Vim tias cov yeeb yaj kiab tiv thaiv nws cov ntaub ntawv tuaj yeem tiv thaiv kev nkag mus rau hauv dej, lub mortar qhov kev tiv thaiv kev nkag mus tau zoo heev. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov cheeb tsam uas muaj cov av noo siab, xws li hauv qab daus, cov khaubncaws sab nraud povtseg, thiab chav dej.
6. Txhim kho daim ntawv cog lus
HPMC tseem tuaj yeem txhim kho kev sib raug zoo ntawm mortar thiab substrate. Thaum tso cov vuas los yog plastering, daim ntawv cog lus ntawm mortar thiab substrate txiav txim siab qhov firmness thiab durability ntawm tag nrho cov qauv. HPMC txhim kho cov khoom rheological ntawm mortar, tso cai rau nws kom zoo dua infiltrate ntawm lub substrate thiab ua rau kom cov cheeb tsam sib cuag, yog li txhim kho daim ntawv cog lus. Qhov no yog qhov zoo tshaj plaws rau kev siv hauv phab ntsa, pem teb, thiab lwm yam scenes uas yuav tsum tau muaj kev sib raug zoo siab.
HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm kev tsim kho-qib mortar. Los ntawm nws cov dej tuav tau zoo, thickening, thiab tiv thaiv sagging, HPMC tuaj yeem txhim kho kev tsim kho kev ua tau zoo, tawg tiv thaiv, huab cua tsis kam, thiab kev sib txuas ntawm mortar. Nws yog dav siv nyob rau hauv ntau lub teb xws li sab nrauv phab ntsa rwb thaiv tsev, pobzeb adhesives, self-leveling pem teb, thiab lwm yam, thiab yog ib tug indispensable thiab tseem ceeb tivthaiv nyob rau hauv niaj hnub tsev cov ntaub ntawv.
Post lub sij hawm: Sep-12-2024