Daim ntawv thov ntawm Hydroxypropyl Methylcellulose (HPMC) hauv kev tsim kho vaj tse

Hydroxypropyl Methylcellulose (HPMC)yog ib qho non-ionic cellulose ether, uas yog siv dav hauv cov ntaub ntawv tsim kho, tshwj xeeb tshaj yog hauv cov ntaub ntawv grouting cement, uas tau nyiam ntau dua thiab ntau dua. Raws li cov khoom siv polymer ua tau zoo, HPMC tuaj yeem txhim kho kev ua haujlwm tsim kho thiab kev ua tiav zaum kawg ntawm cov ntaub ntawv grouting, txhim kho nws cov dej khaws cia, fluidity, sib xws thiab adhesion, yog li ua kom ntseeg tau tias kev tsim kho zoo thiab kev nyab xeeb engineering.

1. Kev txhais thiab kev ua tau zoo ntawm kev siv grouting hauv tsev

Cov grouting hauv tsev feem ntau yog siv los sau cov qhov sib txawv ntawm cov khoom siv hauv tsev, kho cov khoom siv hauv paus, kho cov qauv tsis zoo, kaw cov kab nrib pleb, thiab lwm yam. Cov ntaub ntawv grouting feem ntau suav nrog cov ntaub ntawv grouting ua los ntawm cement, cov ntaub ntawv grouting uas tsis ntsws, cov ntaub ntawv grouting polymer-modified, thiab lwm yam. Nws cov kev xav tau kev ua tau zoo feem ntau suav nrog:

Cov dej ntws zoo thiab cov khoom ntws tus kheej, yog li cov khoom siv grouting tuaj yeem ua kom tiav cov chaw nyuaj lossis nqaim;

Kev khaws dej ntau dua kom tiv thaiv kev ntsws thiab tawg thaum ntxov los ntawm kev poob dej;

Kev txhim kho kev nplaum thiab lub zog kom zoo kom ntseeg tau tias muaj kev sib txuas ruaj khov nrog lub hauv paus lossis cov hlau tuav;

Zoo tiv taus tawg thiab ruaj khov kom ua tau raws li kev nyab xeeb ntawm kev siv mus sij hawm ntev.

Cov ntaub ntawv grouting ib txwm muaj feem cuam tshuam rau cov dej tsis zoo, kev sib cais thiab dej ntws, ntsws thiab tawg hauv kev siv, yog li nws yog qhov tsim nyog los qhia cov khoom siv txhim kho kev ua tau zoo-HPMC.

2. Cov yam ntxwv ntawm HPMC

HPMC yog cov cellulose ether hloov kho ua los ntawm cov cellulose siab-molecular ntuj los ntawm kev sib xyaw ua ke, nrog cov yam ntxwv tseem ceeb hauv qab no:

2.1. Kev khaws dej zoo heev

HPMC tuaj yeem khaws cov dej thaum lub sijhawm ua kom cov cement noo, ncua qhov poob dej, xyuas kom cov cement noo tag nrho, txhim kho lub zog thaum ntxov thiab txo qhov tawg.

2.2. Kev ua kom cov kua ntws zoo dua thiab muaj roj ntau dua

Ntxiv cov HPMC kom tsim nyog tuaj yeem txhim kho qhov fluidity thiab kev tsim kho du ntawm cov khoom siv grouting, ua rau nws yooj yim dua rau ncuav, sau thiab co.

2.3. Kev ruaj khov thiab kev tiv thaiv kev sib cais

HPMC tsim cov qauv network hauv lub grouting system, tswj cov slurry faib, thiab tiv thaiv cov khoom me me, kev sib cais thiab dej ntws.

2.4. Kev ua tau zoo dua ntawm kev sib txuas

Nws cov khoom tsim zaj duab xis thiab cov nyhuv ntub dej ntawm lub substrate tuaj yeem txhim kho kev sib txuas ntawm cov khoom siv grouting thiab cov hauv paus xws li cov pob zeb ua vaj tse, cov hlau tuav, thiab masonry, thiab txhim kho kev ncaj ncees ntawm cov qauv.

2.5. Kev ua tau zoo dua ntawm kev tsim kho thiab lub sijhawm ua haujlwm

HPMC muaj cov dej zoo heev thiab tiv thaiv kev cuam tshuam, uas pab txuas lub sijhawm qhib, txhim kho kev ywj pheej ntawm kev tsim kho, thiab hloov kho rau cov xwm txheej nyuaj ntawm kev tsim kho.

3. Cov nyhuv ntawm kev siv HPMC hauv kev tsim cov grouting

3.1. Daim ntawv thov rau hauv cov khoom siv grouting hauv paus

Kev siv cov grouting hauv paus khoom siv yuav tsum muaj lub zog siab, tsis muaj kev ntsws, thiab muaj kev npliag siab. Tom qab ntxiv HPMC, cov khoom siv grouting tuaj yeem tswj tau qhov npliag zoo yam tsis nce qhov sib piv ntawm dej-cement, zam kev los ntshav thiab kev sib cais, thiab tib lub sijhawm txhim kho qhov ceev ntawm kev sau kom ntseeg tau tias kev ua haujlwm ntev ntawm cov khoom siv ruaj khov.

3.2. Kev siv rau hauv kev kho cov qauv grouting

Thaum kho cov kab nrib pleb hauv cov qauv pob zeb lossis cov nplaim ntawm cov zib ntab, cov khoom siv grouting xav tau kev khaws cia dej siab thiab kev sib txuas siab. HPMC ua tau zoo txhim kho qhov sib koom ua ke ntawm cov khoom siv grouting thiab nws cov nplaum rau ntawm qhov chaw, thaum tswj kev ntsws thiab zam kev tawg thib ob.

3.3. Daim ntawv thov rau hauv cov kav dej prestressed grouting

Cov grouting prestressed duct xav kom cov slurry muaj cov kua dej ntau thiab cov khoom sau kom tiv thaiv qhov tsis muaj dab tsi thiab cov hlau strand tsis raug corroded. HPMC tuaj yeem tiv thaiv cov slurry los ntawm kev sib sau ua ke thiab sib cais, xyuas kom meej tias cov slurry tau sau tag nrho, thiab txhim kho kev ruaj khov.

4. Cov lus qhia rau kev siv HPMC hauv cov mis grouting

Thaum siv HPMC hauv cov ntaub ntawv grouting, tus qauv thiab koob tshuaj yuav tsum tau xaiv kom raug:

Kev xaiv qauv: Xaiv qib viscosity tsim nyog (feem ntau 50,000 ~ 100,000 mPa · s) raws li qhov sib piv ntawm dej-cement thiab kev tsim kho ntawm lub kaw lus grouting;

Tus nqi ntxiv: Feem ntau yog 0.1% ~ 0.5% ntawm cov cement loj, uas tuaj yeem ua kom zoo dua los ntawm kev sim raws li qhov xav tau tshwj xeeb;

Txoj kev ntxiv: HPMC yuav tsum tau muab faib ua ntej kom sib npaug hauv cov khoom sib tov qhuav, thiab tom qab ntawd dej ntxiv rau kev sib tov thiab do kom tsis txhob muaj kev sib sau ua ke thiab cuam tshuam rau cov nyhuv.

Hydroxypropyl methylcellulose (HPMC), ua ib qho khoom siv ua kom zoo heev, ua lub luag haujlwm tseem ceeb hauv kev tsim cov ntaub ntawv grouting. Nws tsis yog tsuas yog txhim kho kev ua tau zoo ntawm kev tsim kho thiab cov khoom siv kho tshuab ntawm cov ntaub ntawv grouting xwb, tab sis kuj txhim kho qhov zoo ntawm grouting thiab kev ua haujlwm ntev. Raws li cov haujlwm tsim kho txuas ntxiv txhim kho lawv cov kev xav tau rau kev ua haujlwm zoo ntawm kev tsim kho thiab cov khoom siv zoo, HPMC yuav siv dav dua thiab tsim kho hauv kev ua grouting thiab lwm yam khoom siv hauv tsev. Rau cov chaw tsim khoom siv grouting, kev paub txog kev siv cov thev naus laus zis HPMC yuav dhau los ua ib qho tseem ceeb rau kev txhim kho kev sib tw tseem ceeb ntawm cov khoom.