Kev siv HPMC hauv cov nplais pobzeb thiab cov cement mortar

Hydroxypropyl methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic. Nws yog siv dav hauv kev tsim kho vaj tse vim nws cov dej yaj tau zoo, ua kom tuab, khaws dej thiab sib txuas, tshwj xeeb tshaj yog hauv cov nplaum pobzeb thiab cov cement mortar. HPMC tsis yog tsuas yog txhim kho kev ua tau zoo ntawm cov khoom siv, tab sis kuj txhim kho nws cov khoom siv kho tshuab thiab kev ruaj khov. Nws yog ib qho khoom siv polymer tseem ceeb hauv cov mortar qhuav niaj hnub.

1. Daim ntawv thov ntawm HPMC hauv cov nplaum pobzeb

Cov nplaum rau pobzeb yog cov khoom siv hloov kho raws li cov cement tshwj xeeb uas siv rau kev tso cov pobzeb thiab pob zeb. Daim ntawv thov HPMC feem ntau pom tseeb hauv cov hauv qab no:

1.1. Txhim kho kev ua haujlwm ntawm kev tsim kho

HPMC tuaj yeem txhim kho lubricity thiab lub sijhawm ua haujlwm ntawm cov nplais pobzeb, ua rau nws yooj yim dua rau khawb thiab siv cov khoom sib npaug, thiab txhim kho kev tsim kho kom zoo. Tshwj xeeb tshaj yog nyob rau hauv qhov chaw kub thiab qhuav, HPMC nrog lub zog khaws cia dej tuaj yeem ncua cov dej evaporation thiab tiv thaiv kev qhuav ntau dhau ua rau tsis muaj zog sib txuas.

1.2. Kev khaws dej kom zoo dua

Cov HPMC zoo muaj peev xwm khaws dej tau zoo heev, uas ua rau cov cement muaj dej txaus thiab txhim kho lub zog sib txuas ntawm cov nplaum. Tib lub sijhawm, kev khaws dej kuj tseem tuaj yeem txo cov teeb meem zoo xws li kev khoob thiab poob.

1.3. Kev ua haujlwm tiv thaiv kev plam zoo dua

Thaum tso cov vuas vov ntsug, HPMC tuaj yeem txo qhov swb ntawm cov vuas vov los ntawm kev kho cov khoom sib xws thiab thixotropy, txhim kho kev nyab xeeb ua haujlwm thiab kev tso zoo.

1.4. Lub sijhawm qhib thiab lub sijhawm hloov kho tau zoo dua

HPMC tuaj yeem ntev lub sijhawm qhib (piv txwv li lub sijhawm tso vuas tom qab thov) thiab lub sijhawm hloov kho (lub sijhawm los kho qhov chaw ntawm cov vuas) ntawm cov nplaum vuas, txhim kho qhov yooj ywm thiab kev ua txhaum ntawm kev tsim kho.

2. Daim ntawv thov ntawm HPMC hauv cov cement mortar

Cov tshuaj cement mortar siv dav hauv kev tsim kho xws li masonry, plastering thiab flooring. Tom qab ntxiv HPMC, kev ua tau zoo ntawm cov tshuaj cement mortar tau zoo dua qub:

2.1. Kev khaws dej kom zoo dua qub

Hauv cov cement mortar ib txwm muaj, dej yooj yim nkag mus rau hauv lub hauv paus lossis ua pa ua ntej lub sijhawm, ua rau cov mortar qhuav thiab tawg thiab tsis lo. HPMC tuaj yeem xauv cov dej noo, ua kom ntseeg tau tias cov mortar muaj dej noo txaus rau cov tshuaj tiv thaiv hydration ua ntej hardening, yog li txhim kho nws lub zog kawg.

2.2. Txhim kho kev ua haujlwm tau zoo thiab kev ua haujlwm tau zoo

HPMC txhim kho qhov lubricity thiab sib xws ntawm cov mortar, ua rau nws yooj yim dua rau kev nthuav dav thiab du, tsis tshua muaj feem cuam tshuam lossis sib cais, thiab txhim kho qhov kev xav thiab qhov zoo ntawm kev tsim kho.

2.3. Txhim kho kev tiv thaiv kab nrib pleb

Vim tias HPMC txhim kho kev khaws dej, cov cement hydration tiav dua, thiab cov teeb meem tawg los ntawm kev ntsws tau txo qis heev, uas pab txhim kho qhov ruaj khov thiab ruaj khov ntawm cov txheej mortar.

2.4. Txuas lub sijhawm tsim kho ntxiv

Nyob rau hauv qhov kub thiab txias lossis huab cua qhuav, cov mortar ib txwm yooj yim poob dej thiab tawv. HPMC tuaj yeem ntev lub sijhawm ua haujlwm thiab txhim kho kev ua haujlwm zoo, tshwj xeeb tshaj yog rau kev ua haujlwm loj.

3. Tus nqi ntxiv HPMC thiab kev ceev faj siv

Feem ntau, HPMC ntxiv rau qhov ntau yog 0.1% ~ 0.5% ntawm qhov hnyav ntawm cov cement, tab sis nws yuav tsum tau hloov kho raws li cov qauv khoom thiab cov kev cai tsim kho. Ntxiv ntau dhau yuav ua rau cov mortar nplaum thiab txo qhov fluidity; tsawg dhau yuav tsis ua lub luag haujlwm ntawm kev khaws dej thiab thickening.

Thaum xaiv HPMC, cov kev ntsuas hauv qab no yuav tsum tau xav txog:

Viscosity: Qhov siab dua qhov viscosity, qhov muaj zog dua qhov khaws cia dej thiab qhov zoo dua qhov kev ua haujlwm tsim kho, tab sis nws yuav cuam tshuam rau fluidity;

Qhov loj me ntawm cov khoom me me thiab kev yaj tau: Nws raug pom zoo kom siv cov khoom lag luam tam sim ntawd los pab txhawb kev sib xyaw ua ke ntawm cov tshuaj qhuav sib xyaw;

Cov ntsiab lus tshauv thiab kev huv: HPMC zoo yuav tsum muaj cov ntsiab lus tshauv tsawg thiab kev huv siab kom txo qhov cuam tshuam rau kev ua kom cov cement noo.

Ua ib qho khoom siv polymer ua tau zoo, HPMC tau dhau los ua cov khoom tseem ceeb hauv kev tsim cov nplais nplaum thiab cov cement mortar. Nws muab kev txhawb nqa zoo rau kev ua haujlwm zoo ntawm cov ntaub ntawv tsim kho niaj hnub los ntawm kev txhim kho kev khaws cia dej, txhim kho kev ua haujlwm ntawm kev tsim kho, thiab txhim kho kev nplaum. Nrog rau kev txhim kho ntawm cov tsev ntsuab thiab kev tsim kho kev lag luam yav tom ntej,cov kev cia siab ntawm daim ntawv thov ntawm HPMC yuav dav duaKev xaiv hom thiab qhov ntau ntawm HPMC yog qhov tseem ceeb rau kev txhim kho kev ua tau zoo ntawm cov nplaum pobzeb thiab cov khoom siv cement mortar.