Cov pob zeb mortar yog ib qho ntawm cov khoom siv feem ntau siv hauv kev tsim kho niaj hnub no. Nws qhov ua haujlwm tau zoo thiab qhov zoo kawg cuam tshuam ncaj qha rau qhov ruaj khov thiab kev zoo nkauj ntawm ib qho project. NtxivHydroxypropyl methylcellulose (HPMC)rau cov qauv mortar tau dhau los ua tus qauv kev lag luam. Ua ib qho polymer ua tau zoo, yaj hauv dej, HPMC ua ntau lub luag haujlwm hauv mortar, suav nrog kev ua kom tuab, khaws dej, thiab txhim kho kev ua haujlwm. Nws yog ib qho khoom ntxiv tseem ceeb rau kev txhim kho kev ua tau zoo ntawm mortar.
1. Cov Haujlwm Tseem Ceeb ntawm HPMC hauv Mortar
1.1. Kev Khaws Dej Zoo Dua Qub
Thaum lub sijhawm tsim cov mortar, cov dej ua pa sai sai lossis nqus los ntawm cov txheej hauv qab tuaj yeem ua rau cov cement tsis muaj dej txaus, ua rau tawg thiab tsis muaj zog txaus. Cov molecule HPMC tsim cov zaj duab xis polymer ruaj khov hauv cov mortar, ua kom zoo xauv hauv dej, qeeb qeeb poob dej thiab ua kom cov cement muaj dej txaus. Qhov kev khaws cia dej zoo no yog qhov tseem ceeb tshwj xeeb thaum ua haujlwm nrog qhov kub thiab txias, qis av noo, lossis cov txheej hauv qab uas nqus tau zoo.
1.2. Txhim kho kev ua haujlwm tau zoo thiab kev ntws tau zoo
HPMC muaj cov khoom siv roj nplua nyeem zoo heev, ua rau cov mortar du thiab yooj yim sib tov, thiab yooj yim nthuav. Nws muab qhov sib xws thiab thixotropy rau cov mortar, uas txhais tau tias nws tswj tau qhov zoo thaum nws tseem thiab ntws tau yooj yim thaum nws co. Qhov no ua rau qhov kev xav ntawm cov mortar zoo dua, txo qhov nyuaj ntawm kev tsim kho, thiab ua kom muaj kev ua haujlwm zoo dua.
1.3. Lub Sijhawm Qhib Ntev thiab Kev Teeb Tsa Ceev
Thaum kub los yog qhuav, qhov chaw ntawm cov mortar feem ntau poob dej sai dhau, ua rau nws nyuaj rau thov lossis sib npaug. HPMC ua rau qeeb qeeb ntawm cov dej noo hauv cov mortar, yog li ua rau lub sijhawm qhib ntev dua thaum thov thiab cia cov neeg ua haujlwm muaj sijhawm ntau dua los kho, yog li zam kev sib koom ua ke tsis sib xws thiab cov chaw tsis sib xws. Nws kuj tswj cov txheej txheem teeb tsa, ua kom ntseeg tau tias cov mortar tawv dua thiab ruaj khov.
1.4. Kev nplaum zoo dua thiab tiv thaiv kev plam
HPMC tsim ib lub qauv network hauv cov cement paste, ua kom muaj kev sib txuas ntawm cov mortar thiab cov substrate. Rau cov kab ke xws li cov nplaum pobzeb, cov thermal insulation mortars, thiab cov plaster mortars, qhov ntxiv ntawm HPMC zoo tiv thaiv kev plam, txhim kho kev sib txuas, thiab ua kom ruaj khov mus sij hawm ntev.
1.5. Txhim kho kev tuav cov duab thiab kev tiv thaiv kev poob qis
Thaum lub sijhawm tsim kho ntawm lub ntsej muag lossis qab nthab, cov mortars feem ntau yuav sag lossis sag. HPMC ua rau muaj kev tiv thaiv sag ntau ntxiv los ntawm kev ua kom cov mortar muaj zog thiab thixotropic, ua rau nws tswj tau nws cov duab zoo thaum lub sijhawm tsim kho, tiv thaiv kev sag thiab xyuas kom meej tias cov tuab ntawm daim ntawv thov sib xws.
2. Kev Siv Tshuaj HPMC thiab Kev Ua Haujlwm Zoo
HPMC feem ntau siv me me, feem ntau muaj li ntawm 0.1% txog 0.5% ntawm cov khoom siv mortar, tab sis nws qhov cuam tshuam tseem ceeb heev. Yog tias tsawg dhau tuaj yeem ua rau tsis muaj dej txaus thiab tsis muaj zog sib txuas, thaum ntau dhau tuaj yeem ncua kev teeb tsa lossis txo lub zog. Yog li ntawd, hom thiab koob tshuaj ntawm mortar yuav tsum tau xaiv kom raug raws li hom mortar (piv txwv li, plaster mortar, vuas nplaum, thermal insulation mortar, self-leveling mortar, thiab lwm yam) thiab qhov chaw tsim kho. HPMC nrog ntau qib ntawm kev hloov pauv thiab viscosity muaj ntau yam cuam tshuam rau kev ua haujlwm ntawm mortar: cov hom viscosity siab muab kev khaws cia dej zoo dua, thaum cov hom viscosity qis qhia txog kev ua haujlwm zoo dua.
3. Qhov Tseem Ceeb thiab Kev Loj Hlob ntawm HPMC
Nrog rau kev siv cov tswv yim txuag hluav taws xob thiab kev tsim kho ntsuab ntau ntxiv, cov tshuaj mortar qhuav tau hloov cov tshuaj mortar ib txwm muaj. Ua ib qho khoom siv tseem ceeb hauv cov txheej txheem mortar qhuav, qhov zoo ntawm HPMC cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom. HPMC zoo ua rau lub cev mortar ruaj khov, ua kom muaj kev siv tas li thiab muaj zog kawg. Tam sim no, cov khoom HPMC tshwj xeeb muaj rau ntau yam kev siv (xws li cov tshuaj mortar tsis muaj dej, cov txheej txheem rwb thaiv tsev phab ntsa sab nraud, thiab cov nplaum pobzeb). Los ntawm kev tswj cov qauv molecular thiab kev hloov kho qhov chaw, cov khoom no ua tiav kev ua tau zoo dua.
HPMCtsis yog tsuas yog ib qho khoom ntxiv rau hauv cov qauv mortar xwb; nws yog ib qho tseem ceeb uas txiav txim siab txog kev ua haujlwm ntawm mortar thiab kev tsim kho zoo. Nws ua rau kev ua haujlwm tag nrho thiab kev tsim kho ntawm mortars zoo dua los ntawm kev txhim kho kev khaws dej, kev ua haujlwm tau zoo, kev nplaum, thiab kev tiv thaiv sag. Nrog rau kev nce qib ntawm thev naus laus zis hauv kev lag luam kev tsim kho, cov kev xav tau kev ua haujlwm rau HPMC kuj tseem nce ntxiv. Cov khoom lag luam HPMC ua haujlwm tau zoo, zoo rau ib puag ncig, thiab hloov kho tau yuav txuas ntxiv tsav tsheb tsim cov khoom siv mortar zoo dua.
Lub sijhawm tshaj tawm: Lub Kaum Hli-10-2025