Vim li cas thiaj siv RDP hauv pob zeb

RDP, los yog Redispersible Polymer Powder, yog ib qho tshuaj ntxiv uas siv rau hauv cov qauv tsim los rau ntau yam laj thawj. Cov additives no yog qhov tseem ceeb ntawm cov hmoov polymer uas tuaj yeem tawg hauv dej los ua ib zaj duab xis tom qab ziab. Nov yog vim li cas RDP siv hauv pob zeb:

1. Txhim kho kev ua haujlwm thiab kev sib koom ua ke: RDP pab txhim kho kev ua haujlwm thiab kev sib koom ua ke ntawm cov pob zeb sib xyaw. Nws ua raws li ib tug dispersant, pab nyob rau hauv dispersion ntawm cement hais thiab lwm yam additives thoob plaws hauv lub sib tov. Qhov no ua rau muaj ntau homogeneous thiab yooj yim-rau-koom ua vaj huam sib luag.
2. Txo cov dej nqus dej: Cov pob zeb uas muaj RDP feem ntau nthuav tawm cov dej nqus dej tsawg. Cov yeeb yaj kiab polymer tsim los ntawm RDP pab txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau hauv cov pob zeb ua kom zoo nkauj, txo kev ua pa thiab tiv thaiv cov dej ingress. Qhov no yog ib qho tseem ceeb tshwj xeeb rau kev txhim kho cov kav ntev thiab kev ua haujlwm ntawm cov pob zeb ua vaj tse rau kev ya raws cuam tshuam txog kev puas tsuaj.
3. Txhim kho Flexural thiab Tensile Strength: Qhov sib ntxiv ntawm RDP rau cov qauv ua vaj tse tuaj yeem txhim kho lub zog flexural thiab tensile zog ntawm cov pob zeb kho. Cov zaj duab xis polymer tsim thaum lub sij hawm hydration txhim kho kev sib raug zoo ntawm cov cement particles thiab aggregates, uas ua rau lub denser thiab muaj zog pob zeb matrix.
4. Txhim kho Adhesion thiab Bonding: RDP txhawb nqa zoo dua adhesion thiab kev sib txuas ntawm cov pob zeb thiab cov substrates. Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo hauv kev kho thiab kho dua tshiab, qhov twg cov pob zeb sib tshooj lossis thaj ua rau thaj yuav tsum tau ua kom zoo rau cov pob zeb uas twb muaj lawm lossis cov substrates.
5. Txo Shrinkage thiab Cracking: RDP pab txo qhov kev pheej hmoo ntawm cov yas shrinkage thiab tawg hauv pob zeb. Cov yeeb yaj kiab polymer tsim los ntawm RDP ua raws li kev tiv thaiv kom tsis txhob ya raws thaum lub sij hawm pib ntawm hydration, tso cai rau cov pob zeb kho kom zoo sib xws thiab txo qis kev loj hlob ntawm cov kab nrib pleb.
6. Txhim kho khov-thaw Resistance: Pob zeb uas muaj RDP nthuav tawm txhim kho kev tiv thaiv kom khov-thaw mus. Cov yeeb yaj kiab polymer tsim los ntawm RDP yuav pab txo qis permeability ntawm cov pob zeb matrix, txo qis cov dej nkag thiab muaj peev xwm ua kom khov-thaw puas tsuaj hauv huab cua txias.
7. Txhim Kho Kev Ua Haujlwm Zoo hauv Cov Txheej Txheem hnyav: RDP tuaj yeem txhim kho kev ua haujlwm ntawm cov pob zeb sib tov hauv qhov hnyav ib puag ncig, xws li kub lossis av noo tsawg. Cov yeeb yaj kiab polymer tsim los ntawm RDP pab txhawm rau txhawm rau cov khoom siv cement, txo kev sib txhuam thiab ua kom yooj yim rau kev khiav thiab tso ntawm cov pob zeb sib tov.

Kev siv RDP hauv cov qauv tsim muaj ntau yam txiaj ntsig, suav nrog kev txhim kho kev ua haujlwm, txo qhov nqus dej, txhim kho lub zog thiab ua haujlwm ntev, txhim kho adhesion thiab kev sib txuas, txo qis shrinkage thiab tawg, txhim kho khov-thaw, thiab txhim kho kev ua haujlwm hauv qhov hnyav. Cov txiaj ntsig no ua rau RDP muaj txiaj ntsig zoo rau kev ua kom zoo dua qhov kev ua tau zoo thiab ua haujlwm ntev ntawm cov pob zeb hauv ntau daim ntawv thov kev tsim kho.