Hydroxypropyl methylcellulose (HPMC) yog ib qho tshuaj siv dav hauv kev tsim cov mortar sib xyaw ntub. Cov cellulose ether compound no muaj cov yam ntxwv tshwj xeeb uas txhim kho kev ua tau zoo, kev ruaj khov thiab kev ua haujlwm ntawm cov mortars. Lub luag haujlwm tseem ceeb ntawm HPMC yog ua kom cov dej khaws cia thiab lo rau, yog li ua kom muaj peev xwm sib txuas ntawm cov mortar.
1. Txhim kho kev ua haujlwm tau zoo
Qhov ua haujlwm tau ntawm cov tshuaj mortar ntub yog hais txog nws lub peev xwm yooj yim tuav thiab nchuav thaum lub sijhawm tsim kho. Qhov no yog ib qho tseem ceeb kom ntseeg tau tias cov tshuaj mortar yooj yim sib tov, nchuav thiab tsim. HPMC ua haujlwm ua cov khoom yas uas ua rau cov tshuaj mortar khaws cia dej thiab viscosity kom raug. Nrog rau kev ntxiv HPMC, cov tshuaj mortar ua rau viscous ntau dua, ua rau nws lo thiab sib txuas zoo dua.
Qhov cuam tshuam ntawm HPMC rau kev ua haujlwm ntawm cov mortar tuaj yeem yog vim nws lub peev xwm los ua kom tuab thiab hloov pauv qhov rheology ntawm cov khoom sib tov. Los ntawm kev ua kom cov viscosity ntawm cov khoom sib tov nce ntxiv, HPMC ua rau nws ntws zoo dua thiab txo qhov kev nyiam sib cais lossis los ntshav. Kev txhim kho rheology ntawm cov khoom sib tov kuj pab txo qhov viscosity ntawm cov mortar, ua rau nws yooj yim dua rau kev ua haujlwm nrog.
2. Ua kom cov dej khaws cia ntau ntxiv
Kev khaws dej yog ib qho tseem ceeb tshaj plaws ntawm cov mortar sib xyaw ntub. Nws hais txog lub peev xwm ntawm mortar kom khaws dej tau ntev. Cov mortar xav tau kev khaws dej txaus kom ua rau muaj zog thiab tiv thaiv kev ntsws thiab tawg thaum ziab.
HPMC txhim kho qhov khaws dej ntawm cov tshuaj sib tov ntub los ntawm kev tswj hwm kev nqus thiab tso dej tawm hauv cov khoom sib tov. Nws tsim ib daim nyias nyias nyob ib puag ncig cov khoom sib tov cement, tiv thaiv lawv kom tsis txhob nqus dej ntau dhau thiab yog li ntawd tswj tau qhov sib xws ntawm cov khoom sib tov. Daim zaj duab xis kuj pab qeeb qeeb qhov kev ua pa ntawm cov dej hauv cov khoom sib tov, yog li ua kom lub sijhawm ua haujlwm ntawm cov tshuaj sib tov ntev dua.
3. Ua kom muaj kev sib txuas ntxiv
Kev nplaum yog lub peev xwm ntawm cov mortar los sib txuas thiab lo rau lub substrate. Qhov no yog ib qho tseem ceeb hauv kev ua kom cov mortar nyob hauv qhov chaw thiab tsis sib cais ntawm qhov chaw uas nws tau siv rau. HPMC txhim kho qhov kev nplaum ntawm cov mortar sib tov ntub los ntawm kev ua kom muaj kev sib koom ua ke ntawm cov sib tov, yog li txhim kho nws cov peev xwm sib txuas.
HPMC ua tiav qhov no los ntawm kev tsim ib daim nyias nyias nyob ib puag ncig cov cement me me, uas pab txhim kho lub zog ntawm cov mortar. Daim zaj duab xis kuj ua haujlwm ua ib qho thaiv, tiv thaiv cov mortar kom tsis txhob sib cais ntawm cov substrate. Kev txhim kho mortar adhesion txhim kho kev ruaj khov thiab kev ntseeg siab ntawm kev tsim kho.
Xaus lus
Qhov ntxiv HPMC rau hauv cov mortars sib xyaw ntub muaj ntau yam txiaj ntsig zoo rau kev ua haujlwm, kev ruaj khov thiab kev ua haujlwm ntawm cov khoom sib xyaw. Nws txhim kho kev khaws dej, kev ua haujlwm thiab kev sib txuas, ua rau cov mortar sib xyaw ua ke, yooj yim dua rau kev tuav thiab txhim khu kev qha dua. Cov yam ntxwv no ua rau HPMC yog cov tshuaj ntxiv tseem ceeb hauv kev tsim cov mortar sib xyaw ntub.
Lub sijhawm tshaj tawm: Cuaj hlis-15-2023