Methyl Hydroxyethyl Cellulose (MHEC), ib qho cellulose ether uas siv ntau hauv cov ntaub ntawv tsim kho, yog siv dav hauv cov mortars qhuav, cov nplaum pobzeb, cov hmoov putty, thiab cov mortars rwb thaiv tsev vim nws cov khoom ua kom tuab, khaws dej, thiab ua haujlwm tau zoo. Ntau tus engineers txhawj xeeb txog ib lo lus nug tseem ceeb thaum siv MHEC: Qhov ntau npaum li cas ntawm MHEC hauv cov cement mortar?
1. Cov Lus Qhia Txog Kev Siv MHEC Hauv Cement Mortar
Feem ntau, qhov kev ntxiv ntawm MHEC rau hauv cov cement mortar yog qhov tsawg heev, tab sis nws tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov mortar. Raws li kev paub dhau los hauv kev lag luam thiab cov ntaub ntawv kev siv tshuab, qhov ntau npaum li cas pom zoo yog:
Cov cement mortar ib txwm muaj: kwv yees li 0.2‰–0.6‰ (piv txwv li, 200–600 grams ib tuj ntawm cov hmoov qhuav).
Cov tshuaj khib plastering thiab cov tshuaj khib masonry: feem ntau nyob rau hauv qhov ntau ntawm 0.3‰ –0.5‰.
Cov tshuaj nplaum rwb thaiv tsev lossis cov tshuaj nplaum tshwj xeeb: tej zaum yuav xav tau cov tshuaj ntau dua me ntsis, kwv yees li 0.4‰–0.7‰. Cov nplaum rau pobzeb lossis cov tshuaj nplaum ua haujlwm siab: Cov tshuaj ntau tuaj yeem nce mus txog kwv yees li 0.6‰–1.0‰ raws li qhov xav tau, tab sis tsis tshua tshaj 1%.
Yuav tsum nco ntsoov tias qhov koob tshuaj MHEC uas pom zoo tsis yog tus nqi ruaj khov thiab cuam tshuam los ntawm cov yam xws li cov qauv mortar, hom cement, qhov zoo ntawm cov khoom sau, qhov kub thiab txias thiab av noo. Yog li ntawd, thaum tsim khoom tiag tiag, qhov koob tshuaj zoo tshaj plaws feem ntau txiav txim siab los ntawm kev sim ua ntej.
2. Cov Yam Uas Cuam Tshuam Rau Qhov Kev Siv Tshuaj Pom Zoo
2.1. Hom Cement thiab Li Cas
Qhov kev ua haujlwm thiab qhov zoo ntawm cov cement, nrog rau cov ntsiab lus ntawm cov admixtures (xws li cov tshauv ya thiab cov hmoov av), txhua yam cuam tshuam rau qhov zoo tshaj plaws MHEC koob tshuaj. Cov mortars uas muaj kev ua haujlwm siab thiab kev siv dej ntau feem ntau xav tau ntau cellulose ether kom muab dej khaws cia.
2.2. Cov Khoom Siv Xuab Zeb thiab Cov Khoom Siv Sau
Qhov loj ntawm cov xuab zeb thiab qhov zoo ntawm cov xuab zeb cuam tshuam rau qhov xav tau dej. Cov xuab zeb me dua lossis cov xuab zeb uas muaj cov khoom sib xyaw ua ke feem ntau xav tau ntau dua MHEC kom tswj tau qhov sib xws thiab ua haujlwm tau zoo.
2.3. Ib puag ncig ntawm kev tsim kho
Thaum muaj qhov kub thiab txias heev, tsis muaj av noo, lossis muaj cua hlob heev, cov dej noo ntawm cov mortar yuav qhuav sai, ua rau yuav tsum tau ntxiv MHEC kom khaws tau dej thiab ntev lub sijhawm qhib.
2.4. Kev Ua Tau Zoo ntawm Lub Hom Phiaj
Yog tias qhov tseem ceeb ntawm kev khaws dej thiab kev tiv thaiv sag, cov tshuaj noj tuaj yeem nce ntxiv me ntsis.
Yog tias qhov ua tau haujlwm yog qhov teeb meem tseem ceeb, qhov koob tshuaj qis dua yuav txaus.
Rau cov ntawv thov nyias nyias (xws li cov nplaum rau pobzeb), kev nce ntxiv ntawm MHEC koob tshuaj yog qhov tseem ceeb heev.
3. Cov teebmeem ntawm MHEC hauv Mortar
Kev ntxiv MHEC kom muaj txiaj ntsig zoo tuaj yeem txhim kho cov khoom siv mortar, suav nrog:
3.1. Kev Khaws Dej Zoo Dua
Cellulose ether tsim cov kua nplaum sib xws, nplaum zoo hauv cov mortar, ua kom cov dej noo nyob hauv thiab tiv thaiv kom tsis txhob muaj cov cement tsis tiav, yog li ua rau lub zog ntxiv.
3.2. Kev Ua Haujlwm Zoo Dua thiab Kev Ua Haujlwm Tau Zoo Dua
Cov tshuaj mortar yuav du thiab zoo, ua rau nws yooj yim dua rau kev nthuav dav, siv, thiab nias thaum lub sijhawm tsim kho, txo cov dej ntws thiab kev sib cais.
3.3. Kev nplaum zoo dua thiab kev tiv thaiv kev poob qis
Thaum lub sijhawm tsim kho ntsug, cov tshuaj mortar yuav tsis tshua poob qis thiab tsim kev sib txuas zoo nrog lub substrate, masonry, lossis insulation board nto.
3.4. Lub Sijhawm Qhib Ntev Dua
MHEC ua rau cov dej hauv cov xuab zeb qeeb qeeb, ua rau cov neeg ua haujlwm tsim kho muaj sijhawm ntau dua los kho thiab txhim kho kev ua haujlwm ntawm kev tsim kho.
3.5. Kev Ua Haujlwm Zoo Dua Tag Nrho ntawm Cov Pob Zeb
Qhov no suav nrog kev tiv thaiv kev tawg, kev ruaj khov, thiab qhov zoo ntawm qhov chaw, ua kom cov mortar muaj lub zog zoo thiab ruaj khov tom qab ua kom tawv.
4. Cov Lus Qhia Txog Kev Siv
Sim Ua Ntej Nce Qib: Vim muaj ntau hom tshuaj sib txawv, nws raug pom zoo kom ua qhov kev kuaj hauv chaw kuaj mob kom paub seb yuav siv tshuaj ntau npaum li cas.
Tsis txhob siv ntau dhau: Kev ntxiv MHEC ntau dhau tuaj yeem ua rau cov mortar ua kom nplaum ntau dhau, ua rau nws nyuaj rau siv thiab txawm tias cuam tshuam rau lub zog.
Xyuas kom meej tias muaj kev sib kis sib npaug: Thaum lub sijhawm sib tov qhuav, xyuas kom meej tias MHEC tau sib tov nrog cov xuab zeb thiab cement kom huv si kom tsis txhob sib sau ua ke.
Cov koob tshuaj pom zoo ntawm MHECHauv cov cement mortar feem ntau yog nruab nrab ntawm 0.2‰ thiab 0.6‰, nrog rau cov mortar tshwj xeeb tso cai rau kev nce ntxiv kom tsim nyog rau 0.7‰ txog 1.0‰. Cov koob tshuaj tshwj xeeb yuav tsum tau ua kom zoo raws li hom mortar, cov khoom siv raw, thiab ib puag ncig kev tsim kho. Kev siv MHEC kom raug tsis yog tsuas yog txhim kho cov mortar khaws dej, ua haujlwm tau, thiab kev ua haujlwm ntawm kev tsim kho, tab sis kuj tseem ua rau muaj zog sib txuas thiab ruaj khov. Nws yog ib qho khoom siv tseem ceeb hauv cov qauv mortar niaj hnub.
Lub sijhawm tshaj tawm: Lub Yim Hli-20-2025