Hydroxypropyl Methylcellulose (HPMC)yog ib qho khoom siv tseem ceeb hauv kev tsim kho, siv dav hauv cov cement mortar, qhuav mortar, txheej thiab lwm yam teb. HPMC ua lub luag haujlwm tseem ceeb hauv kev khaws dej ntawm mortar, thiab tuaj yeem txhim kho qhov ua haujlwm tau zoo, kev ntws, kev nplaum thiab kev tawg ntawm mortar. Tshwj xeeb tshaj yog hauv kev tsim kho niaj hnub no, nws ua lub luag haujlwm tseem ceeb hauv kev txhim kho qhov zoo thiab kev tsim kho ntawm mortar.
1. Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog ib qho cellulose derivative hloov kho los ntawm cellulose chemistry, nrog cov khoom zoo solubility hauv dej, adhesion thiab thickening. AnxinCel®HPMC molecules muaj ob pawg, hydroxypropyl thiab methyl, uas ua rau nws muaj cov yam ntxwv ntawm kev sib xyaw hydrophilicity thiab hydrophobicity, thiab tuaj yeem ua lub luag haujlwm zoo nyob rau hauv ntau yam xwm txheej ib puag ncig. Nws cov haujlwm tseem ceeb suav nrog thickening, water retention, txhim kho rheology thiab adhesion ntawm mortar, thiab lwm yam.
2. Lub ntsiab lus thiab qhov tseem ceeb ntawm kev khaws dej
Qhov khaws dej ntawm cov mortar yog hais txog lub peev xwm ntawm cov mortar kom khaws dej thaum lub sijhawm tsim kho. Qhov poob dej hauv cov mortar cuam tshuam ncaj qha rau nws txoj kev tawv, lub zog thiab kev ua haujlwm kawg. Yog tias cov dej ua pa sai dhau, cov cement thiab lwm yam khoom siv cementitious hauv cov mortar yuav tsis muaj sijhawm txaus los ua cov tshuaj tiv thaiv hydration, ua rau cov mortar tsis muaj zog thiab tsis nplaum zoo. Yog li ntawd, kev khaws dej zoo yog qhov tseem ceeb rau kev ua kom zoo ntawm cov mortar.
3. Cov nyhuv ntawm HPMC rau kev khaws cia dej ntawm cov av nplaum
Qhov ntxiv ntawm HPMC rau hauv mortar tuaj yeem txhim kho qhov kev khaws cia dej ntawm mortar, uas tau pom tseeb hauv cov hauv qab no:
(1) Txhim kho lub peev xwm khaws dej ntawm cov mortar
HPMC tuaj yeem tsim cov qauv zoo li hydrogel hauv cov mortar, uas tuaj yeem nqus thiab khaws cia ntau cov dej, yog li ncua qhov evaporation ntawm dej. Tshwj xeeb tshaj yog thaum tsim kho hauv qhov kub siab lossis qhov chaw qhuav, qhov khaws cia dej ntawm HPMC ua lub luag haujlwm tseem ceeb. Los ntawm kev txhim kho qhov khaws cia dej, HPMC tuaj yeem ua kom ntseeg tau tias cov dej hauv cov mortar tuaj yeem koom nrog tag nrho hauv cov tshuaj tiv thaiv hydration ntawm cement thiab txhim kho lub zog ntawm cov mortar.
(2) Txhim kho qhov fluidity thiab operability ntawm mortar
Thaum lub sijhawm tsim kho, cov tshuaj mortar yuav tsum tswj tau qee qhov kev ntws kom yooj yim rau kev ua haujlwm ntawm cov neeg ua haujlwm hauv kev tsim kho. Kev khaws dej zoo tuaj yeem ua rau qeeb qeeb ntawm cov tshuaj mortar qhuav, ua rau nws yooj yim dua thiab yooj yim rau cov neeg ua haujlwm hauv kev tsim kho kom ua tiav cov haujlwm xws li smearing thiab scraping. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov viscosity ntawm cov tshuaj mortar thiab tiv thaiv kev sib cais lossis kev sib xyaw ntawm cov tshuaj mortar, yog li tswj nws qhov sib xws.
(3) Tiv thaiv kom tsis txhob tawg ntawm cov av nplaum
Tom qab HPMC txhim kho qhov kev khaws dej ntawm cov mortar, nws tuaj yeem txo qhov kev ua kom sai ntawm cov dej ntawm qhov chaw mortar thiab txo qhov kev pheej hmoo ntawm kev tawg. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj qhov kub siab lossis qis av noo, kev ua kom sai ntawm cov dej tuaj yeem ua rau muaj kev tawg ntawm qhov chaw mortar. HPMC pab tswj qhov sib npaug ntawm cov dej noo ntawm cov mortar los ntawm kev qeeb qeeb ntawm kev poob dej, tswj kev ncaj ncees ntawm cov mortar thiab zam kev tsim cov kab nrib pleb.
(4) Ua kom lub sijhawm qhib ntawm cov mortar ntev dua
Lub sijhawm qhib ntawm cov mortar txhais tau tias lub sijhawm uas cov mortar tuaj yeem ua haujlwm thaum lub sijhawm tsim kho. Lub sijhawm qhib luv dhau yuav cuam tshuam rau kev ua haujlwm ntawm kev tsim kho. Kev ntxiv HPMC tuaj yeem ua rau lub sijhawm qhib ntawm cov mortar ntev dua, muab sijhawm rau cov neeg ua haujlwm tsim kho ntau dua los ua cov haujlwm xws li khawb thiab pleev xim. Tshwj xeeb tshaj yog nyob rau hauv cov chaw tsim kho nyuaj, kev ncua sijhawm qhib tuaj yeem ua kom cov mortar lo rau thiab ua haujlwm tau zoo.
4. Txoj kev cuam tshuam ntawm HPMC rau kev khaws cia dej ntawm cov av nplaum
Cov txheej txheem tseem ceeb ntawm HPMC hauv kev txhim kho cov dej khaws cia ntawm cov av nplaum yog raws li nram no:
(1) Kev ua kom dej thiab cov qauv molecular
Cov molecule HPMC muaj ntau pawg hydrophilic hydroxyl (-OH) thiab hydroxypropyl (-CH2OH) pawg, uas tuaj yeem tsim cov hydrogen bonds nrog cov molecule dej thiab txhim kho qhov adsorption ntawm cov molecule dej. Tsis tas li ntawd, HPMC muaj cov qauv molecular loj thiab tuaj yeem tsim cov qauv network peb-seem hauv cov mortar, uas tuaj yeem ntes thiab khaws cov dej thiab qeeb qeeb qhov dej evaporation.
(2) Ua kom cov mortar sib xws thiab viscosity ntau dua
Thaum AnxinCel®HPMC raug ntxiv rau hauv cov mortar ua ib qho thickener, nws yuav ua rau kom cov mortar sib xws thiab viscosity ntau ntxiv, ua rau cov mortar ruaj khov dua thiab txo cov dej poob. Tshwj xeeb tshaj yog nyob rau hauv ib puag ncig kev tsim kho qhuav, qhov thickening effect ntawm HPMC pab txhim kho cov mortar txoj kev tiv thaiv kev tawg.
(3) Txhim kho qhov ruaj khov ntawm cov mortar
HPMC tuaj yeem txhim kho qhov sib koom ua ke ntawm cov mortar thiab txhim kho qhov ruaj khov ntawm cov mortar los ntawm nws cov kev sib cuam tshuam ntawm cov molecular. Qhov kev ruaj khov no tso cai rau cov dej noo ntawm cov mortar kom khaws cia ntawm cov cement me me rau lub sijhawm ntev, yog li ua kom ntseeg tau tias cov cement thiab dej sib xyaw ua ke tag nrho thiab txhim kho lub zog ntawm cov mortar.
5. Cov nyhuv ntawm HPMC hauv kev siv tswv yim
Hauv kev siv ua haujlwm,HPMCFeem ntau siv ua ke nrog lwm cov khoom ntxiv (xws li cov yas ua kom cov khoom sib xyaw, cov khoom sib cais, thiab lwm yam) kom ua tiav qhov kev ua tau zoo tshaj plaws ntawm cov mortar. Los ntawm qhov sib piv tsim nyog, HPMC tuaj yeem ua lub luag haujlwm sib txawv hauv ntau hom mortars. Piv txwv li, hauv cov cement mortar ib txwm muaj, cementitious mortar, qhuav mortar, thiab lwm yam, nws tuaj yeem txhim kho qhov kev khaws cia dej thiab lwm yam khoom ntawm cov mortar.
Lub luag haujlwm ntawm HPMC hauv cov mortar tsis tuaj yeem raug kwv yees qis. Nws txhim kho qhov zoo thiab siv cov nyhuv ntawm mortar los ntawm kev txhim kho cov dej khaws cia ntawm mortar, ncua lub sijhawm qhib, thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Hauv kev tsim kho niaj hnub no, nrog rau kev nce ntxiv ntawm cov thev naus laus zis kev tsim kho thiab kev txhim kho tas mus li ntawm cov kev cai ua haujlwm ntawm mortar, HPMC, ua ib qho tseem ceeb ntxiv, tab tom ua lub luag haujlwm tseem ceeb zuj zus.
Lub sijhawm tshaj tawm: Lub Ob Hlis-15-2025