Kev sib raug zoo ntawm HPMC thiab pobzeb grout

1. Taw qhia rau Hydroxypropyl Methylcellulose (HPMC)

Hydroxypropyl Methylcellulose (HPMC)yog ib qho uas tsis yog-ionic cellulose ether dav siv hauv cov khoom siv hauv tsev, tshuaj, khoom noj, tshuaj niaj hnub thiab lwm yam lag luam. Nws yog tsim los ntawm cov ntaub ntawv ntuj polymer los ntawm kev hloov kho tshuaj thiab muaj cov dej zoo solubility, thickening, dej tuav, film-forming thiab suspension stability. Hauv kev tsim cov khoom siv hauv tsev, HPMC feem ntau yog siv hauv cov tshuaj khib nyiab qhuav, cov nplaum nplaum, cov hmoov putty, grout, thiab lwm yam.

2. Muaj nuj nqi thiab muaj pes tsawg leeg ntawm cov pobzeb grout

Pobzeb grout yog cov khoom siv los sau qhov sib txawv ntawm cov vuas, uas muaj lub luag haujlwm ntawm kev ua kom zoo nkauj, tsis muaj dej, tsis kam tiv thaiv kab mob thiab tawg. Cov khoom tseem ceeb ntawm grout muaj xws li:
Cement los yog cob: ua cov khoom sib txuas tseem ceeb, muab lub zog thiab hardness;
Filler: xws li quartz xuab zeb, calcium carbonate, thiab lwm yam, siv los txhim kho kev hnav tsis kam thiab kev ruaj ntseg ntawm cov grout;
Additives: xws li HPMC, latex hmoov, pigment, thiab lwm yam., uas muab cov grout zoo kev tsim kho, dej tuav, shrinkage kuj thiab durability.

3. Lub luag haujlwm ntawm HPMC hauv pobzeb grout

Txawm hais tias tus nqi ntawm HPMC ntxiv rau cov nplais pobzeb me me, nws lub luag haujlwm tseem ceeb heev, feem ntau cuam tshuam nrog cov hauv qab no:

(1) Kev ruaj ntseg dej

HPMC muaj peev xwm tuav tau dej zoo heev. Nyob rau hauv lub grout, nws muaj peev xwm ncua dej evaporation, txhim kho cov hydration efficiency ntawm cov cement, tag nrho hydrate cement, txhim kho cov adhesion thiab lub zog ntawm grout, thiab txo qhov tawg thiab hmoov los ntawm kev poob dej sai.

(2) Txhim kho kev tsim kho kev ua haujlwm

HPMC tuaj yeem txhim kho cov rheology ntawm grout, ua kom cov slurry yooj yim rau do thiab siv, txhim kho smoothness ntawm kev tsim kho, thiab zam cov teeb meem xws li agglomeration thiab sagging thaum lub sij hawm tsim kho. Tsis tas li ntawd, nws tuaj yeem txuas lub sijhawm tsim kho, muab sijhawm rau cov neeg ua haujlwm kho thiab txhim kho kev tsim kho kom zoo.

(3) Tiv thaiv kev tawg thiab shrinkage

Lub grout yog yooj yim rau shrinkage thiab cracking vim ceev evaporation ntawm dej thaum lub sij hawm hardening txheej txheem. Cov dej tuav cov nyhuv ntawm HPMC tuaj yeem txo qhov kev pheej hmoo no, tswj cov qauv kev ruaj ntseg ntawm cov grout, txo cov tiam ntawm microcracks, thiab txhim kho cov nyhuv grouting.

(4) Txhim kho cov khoom tiv thaiv sagging

Thaum lub sij hawm kev tsim kho ntsug (xws li phab ntsa caulking), tus neeg sawv cev caulking yog yooj yim swb los yog sag vim lub ntiajteb txawj nqus. HPMC kho cov khoom rheological ntawm tus neeg sawv cev caulking thiab txhim kho nws cov thixotropy, kom nws tuav lub siab viscosity nyob rau hauv lub xeev zoo li qub, thiab rov ua kom lub cev muaj zog thaum lub sijhawm nplawm lossis kev tsim kho, yog li txo qhov teeb meem sag thiab txhim kho kev tsim kho.

(5) Txhim kho khov-thaw tsis kam thiab huab cua tsis kam

HPMC tuaj yeem txhim kho tus neeg sawv cev lub peev xwm los tiv thaiv lub voj voog khov-thaw, kom nws nyob ruaj khov nyob rau hauv qhov kub thiab txias thiab tsis yooj yim rau hmoov los yog poob. Nyob rau tib lub sijhawm, nws tseem tuaj yeem txhim kho tus neeg sawv cev ntawm cov huab cua tiv thaiv, yog li nws tseem tuaj yeem tswj tau qhov kev ua tau zoo nyob rau hauv cov xwm txheej hnyav xws li av noo thiab ultraviolet hluav taws xob, thiab txuas ntxiv nws lub neej kev pab cuam.

4. Cov yam ntxwv cuam tshuam rau kev ua haujlwm ntawm HPMC

Cov tsis xws li HPMC qhov hnyav molecular, qib ntawm kev hloov pauv, thiab viscosity yuav cuam tshuam rau qhov kawg ntawm tus neeg sawv cev caulking. Feem ntau hais lus:
Cov viscosity siab dua HPMC tuaj yeem muab cov thickening zog thiab tuav dej, tab sis tuaj yeem txo cov dej ntws;
Kev tsim nyog qib ntawm kev hloov pauv (methoxy thiab hydroxypropyl cov ntsiab lus) tuaj yeem txhim kho kev solubility thiab ua kom lub cev sib xws ntawm tus neeg sawv cev caulking;
Kev noj tshuaj kom tsim nyog tuaj yeem ua kom zoo rau kev ua haujlwm thiab ua haujlwm ntev ntawm tus neeg sawv cev caulking, tab sis kev siv ntau dhau tuaj yeem ua rau cov viscosity ntau dhau, cuam tshuam rau kev tsim kho thiab kev txhim kho lub zog.

Raws li ib qho tseem ceeb additive nyob rau hauv cov pobzeb caulking agents,HPMCFeem ntau txhim kho qhov zoo ntawm cov tshuaj tua kab mob los ntawm kev txhim kho dej tuav, txhim kho kev tsim kho, thiab txhim kho shrinkage kuj thiab durability. Kev xaiv tsim nyog ntawm HPMC ntau yam thiab ntau npaum li cas tuaj yeem txhim kho kev ua haujlwm ntawm cov tshuaj tua kab mob, ua kom muaj kev tsim kho du, thiab txhim kho qhov kawg hniav thiab kev tiv thaiv. Yog li ntawd, nyob rau hauv kev tsim qauv ntawm cov pobzeb caulking agents, kev xaiv thiab kev siv ntawm HPMC yog qhov tseem ceeb heev.