Txoj Haujlwm Mechanism ntawm Redispersible Polymer Powder

Redispersible polymer hmoov (RDP) yog ib qho siv dav hauv polymer binder hauv cov tshuaj khib nyiab qhuav. Lub luag haujlwm tseem ceeb ntawm RDP yog txhawm rau txhim kho lub zog sib txuas, ua haujlwm tau zoo, thiab ua haujlwm ntev ntawm cov tshuaj khib nyiab qhuav.

Lub mechanism ntawm kev txiav txim ntawm RDP nyob rau hauv drymix mortars muaj ob peb kauj ruam:

1. Kev tsim cov yeeb yaj kiab: Thaum RDP ntxiv rau cov tshuaj khib nyiab qhuav, nws tsim ib zaj duab xis rau ntawm qhov chaw ntawm cov khoom sib xyaw qhuav. Cov yeeb yaj kiab no yuav pab ua kom cov adhesion ntawm cov khoom thiab txhim kho kev sib txuas ntawm cov tshuaj khib nyiab.
2. Plasticization: RDP kuj ua raws li cov yas hauv cov tshuaj khib nyiab, uas txhais tau tias nws pab txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm cov khoom sib tov. Qhov no yog ua tiav los ntawm kev txo cov viscosity ntawm qhov sib tov thiab ua kom yooj yim rau kev sib xyaw thiab thov.
3. Kev tuav dej: RDP tuaj yeem nqus tau thiab tuav dej, uas yuav pab ua kom cov mortar hydrated thiab ua haujlwm tau ntev dua. Qhov no yog qhov tseem ceeb tshwj xeeb hauv cov tshuaj khib nyiab uas yuav tsum tau thauj thiab khaws cia rau lub sijhawm ntev.
4. Flexibility: RDP tuaj yeem txhim kho qhov yooj yim thiab ua haujlwm ntev ntawm cov tshuaj khib nyiab qhuav. Qhov no yog ua tiav los ntawm kev txhim kho cov elasticity thiab toughness ntawm qhov sib tov, uas yuav pab txo qis qhov tshwm sim ntawm kev tawg thiab lwm yam kev puas tsuaj.

Zuag qhia tag nrho, kev ua haujlwm ntawm RDP hauv cov tshuaj khib nyiab yog ua raws li nws lub peev xwm los tsim cov yeeb yaj kiab, ua raws li cov yas yas, khaws cov dej, thiab txhim kho qhov yooj yim thiab ua haujlwm ntawm cov khoom sib tov. Cov khoom no ua rau RDP ib qho tseem ceeb ntxiv rau kev txhim kho kev ua tau zoo thiab zoo ntawm cov tshuaj khib nyiab qhuav.