Feem ntau, qhov ua kom cov hmoov putty ua hmoov thiab poob tom qab kev tsim kho, uas yuav cuam tshuam rau lub zog sib txuas ntawm cov putty thiab lub zog ntawm cov txheej. Qhov tshwm sim ntawm cov hmoov no muaj feem cuam tshuam nrog ntau yam, ib qho yog kev siv thiab qhov zoo ntawm hydroxypropyl methylcellulose (HPMC) hauv cov hmoov putty.
1. Lub luag haujlwm ntawm HPMC hauv cov hmoov putty
HPMC, ua ib qho khoom siv ntxiv uas siv ntau, yog siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, suav nrog hmoov putty, mortar, kua nplaum, thiab lwm yam. Nws cov haujlwm tseem ceeb suav nrog:
Cov nyhuv ua kom tuab: HPMC tuaj yeem ua rau kom muaj qhov sib xws ntawm cov hmoov putty, ua rau kev tsim kho du thiab zam kev plam lossis ntws ntawm cov hmoov putty thaum lub sijhawm tsim kho.
Kev khaws dej: HPMC muaj kev khaws dej zoo, uas tuaj yeem ua kom ntev lub sijhawm ua haujlwm ntawm cov hmoov putty thiab tiv thaiv cov putty kom tsis txhob poob dej sai dhau thaum lub sijhawm ziab, ua rau tawg lossis ntsws.
Kev nplaum zoo dua: HPMC tuaj yeem ua rau kom muaj kev nplaum ntawm cov hmoov putty, yog li nws tuaj yeem lo rau ntawm phab ntsa lossis lwm qhov chaw saum npoo av zoo dua, txo qhov tshwm sim ntawm cov teeb meem xws li hollowing thiab poob tawm.
Txhim kho kev ua haujlwm ntawm kev tsim kho: Ntxiv HPMC rau hauv cov hmoov putty tuaj yeem txhim kho qhov fluidity thiab plasticity ntawm kev tsim kho, ua rau kev ua haujlwm tsim kho du dua, thiab txo cov khib nyiab.
2. Vim li cas rau kev sib tsoo hmoov putty
Kev sib tsoo hmoov putty yog ib qho teeb meem uas tshwm sim ntau nrog cov laj thawj nyuaj, uas tej zaum yuav muaj feem cuam tshuam nrog cov hauv qab no:
Teeb meem ntawm cov khoom siv: Cov dej nqus ntawm cov khoom siv muaj zog heev, ua rau cov putty poob dej sai dhau thiab khov tsis tiav, ua rau nws tawg ua tej daim me me.
Teeb meem ntawm cov mis putty: Cov mis tsis raug ntawm cov hmoov putty, xws li qhov sib piv tsis tsim nyog ntawm cov ntaub ntawv cementitious (xws li cement, gypsum, thiab lwm yam), yuav cuam tshuam rau lub zog thiab kev ruaj khov ntawm putty.
Teeb meem ntawm cov txheej txheem tsim kho: Kev tsim kho tsis xwm yeem, qhov kub thiab txias siab lossis qhov av noo qis kuj tseem yuav ua rau cov hmoov putty tawg thaum lub sijhawm ziab.
Kev saib xyuas tsis zoo: Yog tias tsis saib xyuas cov putty raws sijhawm tom qab kev tsim kho lossis ua ntej lub sijhawm mus rau cov txheej txheem tom ntej yuav ua rau cov hmoov putty tawg ua tej daim me me yam tsis tau qhuav tag.
3. Kev sib raug zoo ntawm HPMC thiab kev sib tsoo
Ua ib tug thickener thiab dej-tuav tus neeg sawv cev, qhov kev ua tau zoo ntawm HPMC hauv putty hmoov muaj qhov cuam tshuam ncaj qha rau qhov zoo ntawm putty. Qhov cuam tshuam ntawm HPMC rau hmoov yog feem ntau pom nyob rau hauv cov hauv qab no:
(1) Qhov cuam tshuam ntawm kev khaws dej
Qhov kev ua hmoov ntawm cov hmoov putty feem ntau yog cuam tshuam nrog kev ua kom dej sai sai hauv cov putty. Yog tias qhov ntau ntawm HPMC ntxiv tsis txaus, cov hmoov putty poob dej sai dhau thaum lub sijhawm ziab thiab tsis khov tag nrho, ua rau cov hmoov saum npoo. Cov khoom khaws dej ntawm HPMC pab cov putty tswj cov dej noo kom zoo thaum lub sijhawm ziab, ua rau cov putty maj mam khov thiab tiv thaiv cov hmoov los ntawm kev poob dej sai. Yog li ntawd, kev khaws dej ntawm HPMC yog qhov tseem ceeb rau kev txo cov hmoov.
(2) Qhov cuam tshuam ntawm cov nyhuv tuab
HPMC tuaj yeem ua rau kom cov hmoov putty sib xws, yog li cov putty tuaj yeem txuas nrog lub substrate kom sib npaug. Yog tias qhov zoo ntawm HPMC tsis zoo lossis siv tsis raug, nws yuav cuam tshuam rau qhov sib xws ntawm cov hmoov putty, ua rau nws cov kua dej tsis zoo, ua rau tsis sib xws thiab tuab tsis sib xws thaum lub sijhawm tsim kho, uas yuav ua rau cov hmoov putty qhuav sai dhau hauv zos, ua rau muaj hmoov. Tsis tas li ntawd, kev siv HPMC ntau dhau kuj tseem yuav ua rau qhov chaw ntawm cov hmoov putty du dhau tom qab tsim kho, cuam tshuam rau qhov lo rau cov txheej thiab ua rau muaj hmoov saum npoo.
(3) Kev sib koom tes nrog lwm cov ntaub ntawv
Hauv cov hmoov putty, HPMC feem ntau yog siv ua ke nrog lwm cov ntaub ntawv cementitious (xws li cement, gypsum) thiab cov khoom sau (xws li cov hmoov calcium hnyav, hmoov talcum). Qhov ntau ntawm HPMC siv thiab nws cov synergy nrog lwm cov ntaub ntawv muaj qhov cuam tshuam loj heev rau kev ua haujlwm tag nrho ntawm putty. Cov mis tsis tsim nyog yuav ua rau tsis muaj zog txaus ntawm cov hmoov putty thiab thaum kawg ua rau hmoov. Kev siv HPMC tsim nyog tuaj yeem pab txhim kho kev ua tau zoo thiab lub zog ntawm putty thiab txo qhov teeb meem hmoov uas tshwm sim los ntawm cov ntaub ntawv cementitious tsis txaus lossis tsis sib npaug.
4. Cov teeb meem zoo ntawm HPMC ua rau muaj hmoov av
Ntxiv rau qhov ntau ntawm HPMC siv, qhov zoo ntawm HPMC nws tus kheej kuj tseem yuav cuam tshuam rau kev ua haujlwm ntawm cov hmoov putty. Yog tias qhov zoo ntawm HPMC tsis yog tus qauv, xws li qhov tsis huv ntawm cellulose thiab kev ua haujlwm tsis zoo ntawm kev khaws cia dej, nws yuav cuam tshuam ncaj qha rau kev khaws cia dej, kev ua haujlwm ntawm kev tsim kho thiab lub zog ntawm cov hmoov putty, thiab ua rau muaj kev pheej hmoo ntawm hmoov. HPMC qis dua tsis yog tsuas yog nyuaj rau muab kev khaws cia dej ruaj khov thiab cov teebmeem tuab, tab sis kuj tseem yuav ua rau qhov chaw tawg, hmoov thiab lwm yam teeb meem thaum lub sijhawm ziab ntawm putty. Yog li ntawd, kev xaiv HPMC zoo yog qhov tseem ceeb kom tsis txhob muaj teeb meem hmoov.
5. Cov teebmeem ntawm lwm yam tseem ceeb rau kev ua hmoov
Txawm hais tias HPMC ua lub luag haujlwm tseem ceeb hauv cov hmoov putty, kev ua hmoov feem ntau yog qhov tshwm sim ntawm kev sib xyaw ua ke ntawm ntau yam. Cov yam hauv qab no kuj tseem yuav ua rau muaj hmoov:
Tej yam ib puag ncig: Yog tias qhov kub thiab txias ntawm qhov chaw tsim kho siab dhau lossis qis dhau, nws yuav cuam tshuam rau qhov ceev ziab thiab qhov kho zaum kawg ntawm cov hmoov putty.
Kev kho cov khoom siv tsis raug: Yog tias cov khoom siv tsis huv lossis qhov chaw ntawm cov khoom siv nqus dej ntau dhau, nws yuav cuam tshuam rau qhov nplaum ntawm cov hmoov putty thiab ua rau muaj hmoov av.
Cov mis hmoov putty tsis muaj txiaj ntsig: Siv HPMC ntau dhau lossis tsawg dhau, thiab qhov sib piv ntawm cov ntaub ntawv cementitious tsis raug, uas yuav ua rau tsis txaus lo thiab lub zog ntawm cov hmoov putty, yog li ua rau hmoov.
Qhov tshwm sim ntawm cov hmoov putty muaj feem cuam tshuam nrog kev siv HPMC. Lub luag haujlwm tseem ceeb ntawm HPMC hauv cov hmoov putty yog khaws dej thiab ua kom tuab. Kev siv tsim nyog tuaj yeem tiv thaiv qhov tshwm sim ntawm cov hmoov. Txawm li cas los xij, qhov tshwm sim ntawm cov hmoov tsis yog nyob ntawm HPMC xwb, tab sis kuj nyob ntawm cov yam xws li cov mis ntawm cov hmoov putty, kev kho cov khoom siv, thiab ib puag ncig kev tsim kho. Txhawm rau kom tsis txhob muaj teeb meem ntawm cov hmoov, nws tseem ceeb heev rau kev xaiv HPMC zoo, tsim cov mis tsim nyog, kev siv tshuab tsim kho thiab ib puag ncig kev tsim kho zoo.
Lub sijhawm tshaj tawm: Lub Kaum Hli-15-2024