Hauv kev tsim kho niaj hnub no, kev ua haujlwm ntawm cov mortar cuam tshuam ncaj qha rau qhov zoo thiab kev ua haujlwm ntawm qhov project. Txhawm rau txhim kho cov dej khaws cia, ua haujlwm tau zoo, thiab lo rau cov mortar,Hydroxypropyl methylcellulose (HPMC)yog siv dav hauv ntau yam kev sib xyaw ua ke ntawm cov mortar qhuav, xws li cov nplaum pobzeb, cov plaster mortars, cov mortars uas nws tus kheej tau teeb tsa, thiab cov mortars rwb thaiv tsev thermal. Ua ib qho polymer uas yaj tau zoo heev hauv dej, HPMC rau mortar txhim kho qhov ua haujlwm ntawm mortar los ntawm nws cov qauv molecular thiab cov khoom siv physicochemical, ua rau nws yog ib qho khoom siv tseem ceeb hauv cov qauv mortar niaj hnub.
1.HPMC ua kom pom tseeb tias nws khaws dej tau zoo heev. Hauv cov tshuab mortar, HPMC tsim cov zaj duab xis polymer ntom ntom rau ntawm qhov chaw ntawm cov cement, ua kom txo tau qhov poob dej thaum sib tov, siv, thiab teeb tsa thawj zaug. Qhov kev khaws dej no tsis yog tsuas yog ua kom cov cement muaj dej txaus thiab ua kom muaj zog ntxiv xwb, tab sis kuj tiv thaiv kev qhuav dej thiab tawg ua ntej los ntawm kev nqus dej ntau dhau lossis kub heev hauv txheej hauv paus. Rau cov khoom xws li cov nplaum pobzeb thiab cov hmoov putty uas xav tau kev siv txheej nyias, HPMC qhov kev khaws dej yog qhov tseem ceeb heev, ua rau lub sijhawm qhib thiab lub sijhawm hloov kho ntev dua, txhim kho kev kam rau siab ntawm kev siv.
2.HPMC tuaj yeem txhim kho cov khoom rheological thiab kev ua haujlwm ntawm cov mortar. Ib qho ntau ntawm HPMC tuaj yeem txhim kho viscoelasticity ntawm lub cev mortar, muab cov roj nplua nyeem zoo heev thiab thixotropy thaum lub sijhawm sib tov thiab thov, tiv thaiv kev los ntshav thiab kev sib cais, thiab ua kom cov plastering thiab txheej du dua. Nws kuj tseem txhim kho cov khoom tiv thaiv kev plam ntawm cov mortar, ua kom cov vuas lossis cov laug cam rwb thaiv tsev tsis plam lossis txav thaum lub sijhawm thov. Qhov kev tswj hwm rheological ntawm HPMC tso cai rau cov neeg thov kom yooj yim tswj cov mortar tuab thiab qhov du ntawm qhov chaw, yog li txhim kho kev siv tau zoo thiab qhov zoo ntawm cov khoom kawg.
3.HPMC muaj cov yam ntxwv zoo heev uas ua rau cov mortar tuab thiab ruaj khov. Vim tias nws cov qauv polymer saw hlau tsim cov tshuaj colloidal ruaj khov hauv dej, HPMC tuaj yeem ua rau cov mortar viscosity ntau ntxiv ntawm cov koob tshuaj tsawg, tiv thaiv kev faib ua pawg thiab kev poob thaum lub sijhawm khaws cia thiab siv. Qhov no tsis yog tsuas yog txhim kho kev ruaj khov thiab kev siv ntawm cov mortar qhuav sib xyaw, tab sis kuj pab txhim kho kev khaws cia thiab kev ua haujlwm ntim khoom ntawm cov khoom.
4.HPMC kuj tseem ua rau cov mortar sib txuas thiab tawg tsis kam. Cov zaj duab xis polymer uas nws tsim qhia txog qee qib ntawm kev ywj pheej thiab kev tawv, ua haujlwm ua tus choj tom qab cov mortar tawv, txo cov kab nrib pleb me me los ntawm kev ntxhov siab shrinkage. Ntxiv mus, nws txhim kho lub zog sib txuas ntawm cov mortar thiab cov substrate lossis pobzeb nto, ua rau cov txheej tiav lawm ruaj khov dua thiab ruaj khov. HPMC qhov kev sib txuas ua kom muaj zog yog qhov tseem ceeb tshwj xeeb hauv cov txheej txheem rwb thaiv tsev phab ntsa sab nraud thiab cov nplaum mortars.
5.Hauv kev siv ua haujlwm, ntau hom mortar xav tau cov lus qhia HPMC sib txawv. Piv txwv li, cov nplaum pobzeb feem ntau siv cov viscosity nruab nrab mus rau siab, tso qeeb HPMC kom ntseeg tau tias tiv thaiv kev plam thiab khaws dej, thaum cov mortars tus kheej yog haum rau cov viscosity qis, yaj sai HPMC kom tswj tau fluidity thiab daim ntawv thov du. Los ntawm kev xaiv viscosity, degree ntawm kev hloov pauv, thiab cov qauv ntawm cov khoom me me, cov neeg tsim qauv tuaj yeem ua tiav qhov sib npaug zoo tshaj plaws ntawm kev khaws dej, fluidity, thiab lub zog.
6. HPMCrau cov tshuaj khib, nrog nws cov yam ntxwv tshwj xeeb ntawm kev khaws dej, ua kom tuab, ua kom lubrication, thiab kev sib txuas, tau dhau los ua cov khoom siv tseem ceeb rau kev txhim kho kev ua haujlwm ntawm cov tshuaj khib qhuav. Nws tsis yog tsuas yog ua kom zoo dua qhov kev paub txog kev tsim kho xwb tab sis kuj tseem txhim kho qhov zoo thiab kev ua haujlwm ntev ntawm qhov project. Nrog rau kev txhim kho cov ntaub ntawv tsim kho ntsuab thiab cov tshuaj khib ua haujlwm siab, kev siv HPMC hauv cov ntaub ntawv tsim kho yuav txuas ntxiv nthuav dav, thiab nws cov thev naus laus zis tshiab thiab kev ua kom zoo dua ntawm cov khoom yuav dhau los ua cov lus qhia tseem ceeb rau kev txhawb nqa kev txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev.
Lub sijhawm tshaj tawm: Lub Kaum Hli-09-2025