Yuav ua li cas yog lub mechanism ntawm kev txiav txim ntawm redispersible polymer hmoov?

Cov txheej txheem ntawm kev txiav txim ntawm redispersible polymer hmoov (RPP) koom nrog lawv cov kev sib cuam tshuam nrog dej thiab lwm yam khoom ntawm mortar formulations, ua rau kev txhim kho kev ua tau zoo thiab cov khoom. Nov yog cov lus piav qhia ntxaws ntxaws ntawm lub tshuab ua haujlwm ntawm RPP:

1. Kev hloov pauv hauv dej:
   • RPP yog tsim los kom tawg tau yooj yim hauv dej, ua kom ruaj khov colloidal suspensions lossis kev daws teeb meem. Qhov no redispersibility yog qhov tseem ceeb rau lawv kev koom ua ke rau hauv mortar formulations thiab tom qab hydration.
2. Zaj duab xis tsim:
   • Thaum redispersion, RPP tsim ib zaj duab xis nyias los yog txheej nyob ib ncig ntawm cov cement hais thiab lwm yam khoom ntawm mortar matrix. Cov yeeb yaj kiab no ua raws li kev sib khi, khi cov khoom ua ke thiab txhim kho kev sib koom ua ke hauv mortar.
3. Adhesion:
   • RPP zaj duab xis txhim kho qhov adhesion ntawm mortar Cheebtsam (xws li, cement, aggregates) thiab substrate nto (xws li, pob zeb, masonry). Qhov no txhim kho adhesion tiv thaiv delamination thiab ua kom muaj kev sib raug zoo ntawm cov mortar thiab substrate.
4. Kev tuav dej:
   • RPP muaj cov khoom siv hydrophilic uas ua rau lawv nqus thiab khaws cov dej hauv cov tshuaj khib nyiab. Qhov kev tuav dej ntau ntxiv no ua rau cov dej ntawm cov ntaub ntawv cementitious, ua rau muaj kev ua haujlwm zoo dua, qhib lub sijhawm qhib, thiab txhim kho adhesion.
5. Flexibility thiab Elasticity:
   • RPP impart elasticity thiab elasticity rau lub mortar matrix, ua rau nws ntau resistant rau tawg thiab deformation. Qhov kev hloov pauv no tso cai rau lub mortar kom haum raws li kev txav mus los ntawm cov substrate thiab thermal expansion / contraction yam tsis muaj kev cuam tshuam nws txoj kev ncaj ncees.
6. Txhim kho kev ua haujlwm:
   • Lub xub ntiag ntawm RPP txhim kho kev ua haujlwm thiab sib xws ntawm mortar, ua kom yooj yim rau kev sib xyaw, thov, thiab sib kis. Qhov kev txhim kho kev ua haujlwm no tso cai rau kev pabcuam zoo dua thiab daim ntawv thov sib xws, txo qhov kev pheej hmoo ntawm cov voids lossis qhov tsis sib xws hauv cov mortar tiav.
7. Durability Enhancement:
   • RPP-hloov mortars nthuav tawm txhim kho kev ua haujlwm ntev vim lawv txhim kho kev tiv thaiv huab cua, tshuaj tua kab mob, thiab puas. RPP zaj duab xis ua raws li kev tiv thaiv kev tiv thaiv, tiv thaiv mortar los ntawm cov neeg ua phem sab nraud thiab ua rau nws lub neej ua haujlwm ntev.
8. Tswj Kev Tso Tawm Ntawm Cov Tshuaj Ntxiv:
   • RPP tuaj yeem ntim thiab tso tawm cov khoom xyaw lossis cov khoom ntxiv (piv txwv li, plasticizers, accelerators) nyob rau hauv mortar matrix. Qhov kev tswj hwm kev tso tawm no tso cai rau kev ua haujlwm zoo thiab cov qauv tsim kho kom tau raws li cov kev thov tshwj xeeb.

Lub mechanism ntawm kev txiav txim ntawm redispersible polymer hmoov koom nrog lawv redispersion nyob rau hauv dej, tsim zaj duab xis, adhesion li, dej tuav, yooj yooj yim, txhim khu kev qha kev ua hauj lwm, durability li, thiab tswj kev tso tawm additives. Cov txheej txheem no koom ua ke rau kev txhim kho kev ua tau zoo thiab cov khoom ntawm RPP-hloov mortars hauv ntau daim ntawv thov kev tsim kho.