Kev sib raug zoo ntawm HPMC thiab cov vuas grout

1. Kev Taw Qhia Txog Hydroxypropyl Methylcellulose (HPMC)

Hydroxypropyl Methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, tshuaj, khoom noj, tshuaj lom neeg txhua hnub thiab lwm yam lag luam. Nws yog ua los ntawm cov khoom siv polymer ntuj los ntawm kev hloov kho tshuaj thiab muaj kev yaj dej zoo, ua kom tuab, khaws dej, tsim zaj duab xis thiab ruaj khov. Hauv kev lag luam ntawm cov ntaub ntawv siv hauv kev tsim kho, HPMC feem ntau yog siv rau hauv cov mortar qhuav, cov nplaum pobzeb, hmoov putty, grout, thiab lwm yam los txhim kho kev ua haujlwm ntawm kev tsim kho thiab txhim kho qhov zoo ntawm cov khoom kawg.

2. Kev ua haujlwm thiab cov khoom sib xyaw ntawm cov pob zeb grout

Cov grout rau pobzeb yog ib yam khoom siv los sau qhov sib txawv ntawm cov pobzeb, uas muaj cov haujlwm ntawm kev txhim kho kev zoo nkauj, kev tiv thaiv dej, kev tiv thaiv pwm thiab kev tiv thaiv tawg. Cov khoom tseem ceeb ntawm grout suav nrog:
Cement los yog resin: ua cov khoom siv tseem ceeb, muab lub zog thiab tawv;
Cov khoom siv sau: xws li xuab zeb quartz, calcium carbonate, thiab lwm yam, siv los txhim kho kev hnav tsis kam thiab kev ruaj khov ntawm cov grout;
Cov khoom ntxiv: xws li HPMC, hmoov latex, xim, thiab lwm yam, uas muab cov grout zoo rau kev tsim kho, khaws dej, tiv taus shrinkage thiab ruaj khov.

3. Lub luag haujlwm ntawm HPMC hauv cov vuas grout

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

(1) Kev khaws dej

HPMC muaj peev xwm khaws dej tau zoo heev. Hauv cov grout, nws tuaj yeem ncua qhov dej evaporation, txhim kho qhov ua tau zoo ntawm cov cement, hydrate cement tag nrho, txhim kho qhov lo thiab lub zog ntawm cov grout, thiab txo qhov tawg thiab hmoov av los ntawm kev poob dej sai.

(2) Txhim kho kev ua tau zoo ntawm kev tsim kho

HPMC tuaj yeem txhim kho qhov rheology ntawm cov grout, ua rau cov slurry yooj yim dua rau do thiab thov, txhim kho qhov du ntawm kev tsim kho, thiab zam cov teeb meem xws li agglomeration thiab sagging thaum lub sijhawm tsim kho. Tsis tas li ntawd, nws tuaj yeem ntev lub sijhawm tsim kho, muab sijhawm ntau rau cov neeg ua haujlwm los kho thiab txhim kho qhov zoo ntawm kev tsim kho.

(3) Tiv thaiv kom tsis txhob tawg thiab ntsws

Cov grout feem ntau yuav ntsws thiab tawg vim yog cov dej ua pa sai sai thaum lub sijhawm ua kom tawv. Cov nyhuv khaws dej ntawm HPMC tuaj yeem txo qhov kev pheej hmoo no, tswj kev ruaj khov ntawm cov grout, txo qhov tsim ntawm cov kab nrib pleb me me, thiab txhim kho cov nyhuv grouting.

(4) Txhim kho cov khoom tiv thaiv kev sagging

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

(5) Txhim kho kev tiv thaiv khov-thaw thiab kev tiv thaiv huab cua

HPMC tuaj yeem txhim kho lub peev xwm ntawm tus neeg sawv cev caulking kom tiv taus cov voj voog khov-thaw, yog li nws tseem ruaj khov hauv qhov chaw kub qis thiab tsis yooj yim rau hmoov lossis poob tawm. Tib lub sijhawm, nws kuj tseem tuaj yeem txhim kho qhov kev tiv thaiv huab cua ntawm tus neeg sawv cev caulking, yog li nws tseem tuaj yeem tswj tau qhov kev ua tau zoo hauv qab cov xwm txheej hnyav xws li av noo thiab ultraviolet hluav taws xob, thiab txuas ntxiv nws lub neej kev pabcuam.

4. Tej yam uas cuam tshuam rau kev ua tau zoo ntawm HPMC

Cov kev ntsuas xws li HPMC qhov hnyav molecular, qib ntawm kev hloov pauv, thiab viscosity yuav cuam tshuam rau qhov kev ua tau zoo kawg ntawm tus neeg sawv cev caulking. Feem ntau hais lus:
Cov viscosity siab dua HPMC tuaj yeem ua rau muaj zog dua thiab khaws dej, tab sis yuav txo qhov fluidity;
Qib kev hloov pauv tsim nyog (methoxy thiab hydroxypropyl cov ntsiab lus) tuaj yeem txhim kho kev yaj thiab xyuas kom meej tias tus neeg sawv cev caulking sib xws;
Kev siv tshuaj kom raug tuaj yeem ua rau tus neeg sawv cev caulking ua haujlwm tau zoo dua thiab ruaj khov, tab sis kev siv tshuaj ntau dhau tuaj yeem ua rau viscosity ntau dhau, cuam tshuam rau kev tsim kho thiab kev txhim kho lub zog.

Ua ib qho tseem ceeb additive hauv cov vuas caulking agents,HPMCfeem ntau txhim kho qhov zoo ntawm cov neeg sawv cev caulking los ntawm kev txhim kho kev khaws cia dej, txhim kho kev ua haujlwm ntawm kev tsim kho, thiab txhim kho kev tiv thaiv shrinkage thiab kev ruaj khov. Kev xaiv cov HPMC ntau yam thiab cov koob tshuaj tsim nyog tuaj yeem ua kom zoo dua qhov kev ua tau zoo ntawm cov neeg sawv cev caulking, xyuas kom meej tias kev tsim kho du, thiab txhim kho qhov kawg kho kom zoo nkauj thiab tiv thaiv. Yog li ntawd, hauv kev tsim cov qauv ntawm cov neeg sawv cev caulking pobzeb, kev xaiv thiab daim ntawv thov ntawm HPMC yog qhov tseem ceeb.