Cov khoom siv sib xyaw qhuav thiab cov cellulose ethers

Cov tshuaj mortar qhuav yog cov hmoov tiav lawm uas ua los ntawm kev sib xyaw cov khoom siv cementitious, cov aggregates, cov fillers, thiab ntau yam khoom siv ntxiv rau hauv qhov sib piv kom haum hauv lub Hoobkas. Thaum lub sijhawm tsim kho, nws tuaj yeem siv tau yooj yim los ntawm kev ntxiv dej thiab do. Txhawm rau kom ua tau raws li kev ua tau zoo ntawm kev tsim kho thiab kev ua haujlwm ntev, cov tshuaj mortar qhuav feem ntau xav tau ntxiv ntau yam khoom ntxiv, uas yog cellulose ethers yog ib qho ntawm cov khoom siv organic polymer tseem ceeb tshaj plaws.

1. Kev faib tawm ntawm cov khoom siv ntxiv rau cov pob zeb sib xyaw qhuav

1.1. Cov Tshuaj Uas Ua Rau Kom Cov Khoom Thickened
Piv txwv li feem ntau suav nrogHydroxypropyl methylcellulose (HPMC),hydroxyethyl methylcellulose (HEMC), thiabHydroxyethyl Cellulose (HEC).

Cov Haujlwm Tseem Ceeb: Txhim kho cov dej khaws cia ntawm cov av nplaum, tiv thaiv kev los ntshav, txuas lub sijhawm qhib, thiab txhim kho kev sib xws thiab thixotropy thaum lub sijhawm tsim kho.

1.2. Cov Tshuaj Txhawb Nqa thiab Cov Tshuaj Ua Kom Ceev
Cov tshuaj tiv thaiv (xws li citric acid thiab tartaric acid) ncua qhov kev teeb tsa thiab tsim nyog rau kev tsim kho kub siab lossis kev siv loj. Cov tshuaj ua kom nrawm (xws li cov ntsev chloride thiab cov ntsev txhuas) ua kom nrawm qhov kev teeb tsa thiab kev tawv ntawm qhov kub qis.

1.3. Cov Neeg Ua Haujlwm Rau Kev Nkag Mus Rau Hauv Paus
Feem ntau siv lignin sulfonates thiab alkyl sulfonates. Lawv txhim kho kev ua haujlwm ntawm cov mortar, tiv taus te, thiab ua kom yooj yim siv los ntawm kev tsim cov npuas me me.

1.4. Cov Tshuaj Txo Dej
Feem ntau yog cov neeg sawv cev ua los ntawm naphthalene thiab polycarboxylic acid, lawv txo kev siv dej thiab txhim kho lub zog thiab qhov ceev ntawm cov mortar.

1.5. Hmoov Polymer uas yaj tau dua (RDP)
Ua kom cov mortar yooj ywm, nplaum tau zoo, thiab tiv taus tawg. Feem ntau siv rau hauv cov nplaum rau pobzeb, cov khoom siv rwb thaiv tsev phab ntsa sab nraud, thiab cov mortar kho.

1.6. Lwm Cov Khoom Siv Ntxiv
Muaj xws li cov tshuaj tiv thaiv pwm, cov tshuaj tiv thaiv dej, cov hmoov hydrophobic, thiab cov hmoov txhuv nplej siab uas ua kom tuab. Cov tshuaj ntxiv no raug xaiv raws li lub hom phiaj siv ntawm cov tshuaj mortar.

2. Lub Txheej Txheem Ua Haujlwm ntawm Cellulose Ethers hauv Cov Mortars Qhuav-Mix

Cellulose ethers yog ib chav kawm ntawm cov polymers uas yaj tau hauv dej uas siv dav hauv ntau yam kev sib xyaw ua ke qhuav. Nws cov txheej txheem tseem ceeb ntawm kev ua haujlwm suav nrog:

2.1. Kev Khaws Dej
Cov cellulose ether molecules nqus thiab xauv rau hauv cov dej sib xyaw, qeeb nws qhov poob rau hauv lub substrate thiab huab cua, ua kom muaj sijhawm txaus rau cov khoom siv cementitious, yog li txhim kho lub zog ntawm mortar.

2.2. Kev Tswj Xyuas Kom Tuab Thiab Kev Hloov Pauv
Cov cellulose ethers tsim cov kua nplaum hauv dej, txhim kho qhov sib xws ntawm cov dej noo thiab kev nplaum ntawm cov mortar, ua rau nws tsis yooj yim rau kev plam (sag tsis kam) thaum siv rau ntawm cov chaw ntsug. Ntxiv mus, cov cellulose ethers zoo qhia tau tias muaj thixotropy zoo heev, pab txhawb kev du thiab calendering.

2.3. Kev Ua Haujlwm Zoo Dua
Qhov kev sib koom ua ke ntawm kev khaws dej thiab cov khoom rheological ua rau lub sijhawm ua haujlwm ntev dua thiab muaj kev xav zoo rau cov mortar, txo qhov qaug zog thaum siv.

2.4. Kev Ruaj Ntseg Zoo Dua
Txo kev sib cais thiab kev ntws ntawm cov pob zeb sib xyaw thiab cov ntaub ntawv cementitious ua rau cov mortar sib npaug thiab kev ruaj khov ntawm kev tsim kho.

3. Kev Siv Cellulose Ethers Hauv Cov Mortars Qhuav Sib Xyaws Sib Txawv

3.1. Cov Pob Zeb Masonry thiab Cov Pob Zeb Plaster

Yuav tsum muaj dej khaws cia zoo thiab ua haujlwm tau zoo. Cellulose ethers tuaj yeem txo qhov hollowing thiab tawg, thiab txhim kho kev nplaum.

3.2. Cov nplaum rau pobzeb

Yuav tsum muaj cov khoom zoo heev uas tiv thaiv kev poob qis thiab lub sijhawm qhib ntev. Cov cellulose ethers ua kom cov vuas tsis swb tom qab siv thiab tso cai rau lub sijhawm kho kom txaus.

3.3. Cov Pob Zeb Uas Ua Rau Nws Tus Kheej Sib Npaug

Yuav tsum muaj dej ntau thiab ruaj khov. Xaiv cov cellulose ether uas muaj viscosity tsawg thiab khaws dej tau zoo kom tsis txhob los ntshav thiab sib cais.

3.4. Cov Khoom Siv Rwb Thaiv Sab Nraud (EIFS) Mortar

Qhov kev khaws dej ncaj qha cuam tshuam rau qhov kev sib txuas ntawm lub rooj tsavxwm rwb thaiv tsev thiab cov mortar. Cellulose ethers tuaj yeem ua kom muaj qhov zoo sib xws thaum lub sijhawm thov loj.

4. Kev Xaiv thiab Kev Xav Ntxiv

Kev Xaiv Viscosity: Viscosity siab muab cov dej tuav tau zoo tab sis yuav txo qhov ua haujlwm tau; viscosity qis muab cov kua dej zoo tab sis yuav ua rau los ntshav. Kev hloov kho yuav tsum tau ua raws li cov qauv tshwj xeeb. Qhov ntau ntxiv: Feem ntau 0.1% txog 0.5% ntawm cov khoom siv cementitious qhov hnyav. Kev ntxiv ntau dhau yuav cuam tshuam rau lub zog thiab lub sijhawm qhuav.
Kev tawg ua kom sib xyaw: Yuav tsum tau tawg ua kom sib xyaw kom huv si thaum lub sijhawm sib tov qhuav kom tiv thaiv kev sib sau ua ke tom qab ntxiv dej.

Kev txhim kho kev ua tau zoo ntawm cov mortar qhuav-mix xav tau lub kaw lus ntxiv zoo, thiabcellulose etheryog ib qho tseem ceeb hauv lub kaw lus no. Nws tsis yog tsuas yog ua kom cov mortar khaws dej thiab ua haujlwm tau zoo xwb, tab sis kuj tseem cuam tshuam tsis ncaj qha rau lub zog sib txuas, kev ruaj khov, thiab qhov zoo ntawm qhov chaw. Nrog rau kev nce ntxiv ntawm cov kev xav tau kev tsim kho thiab kev siv dav dav ntawm kev txuag hluav taws xob thiab cov tswv yim zoo rau ib puag ncig, kev siv cellulose ether hauv cov mortar qhuav yuav dhau los ua ntau yam thiab zoo dua.