Redispersible polymer hmoov (RDP) yog ib qho tseem ceeb ntawm cov khoom siv niaj hnub tsim, tshwj xeeb hauv cov nplaum, mortars, thiab plasters. Los ntawm kev txhim kho lub cev thiab tshuaj lom neeg cov khoom ntawm cov ntaub ntawv no, RDPs ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov kav ntev thiab kev ua haujlwm ntawm kev tsim kho.
Kev sib xyaw thiab Mechanism ntawm RDP
RDP yog tsim los ntawm cov tshuaj tsuag kom qhuav ib qho emulsion ntawm cov ntaub ntawv polymeric, feem ntau raws li cov yas acetate-ethylene (VAE), acrylic, los yog styrene-butadiene. Cov txheej txheem no hloov cov emulsion mus rau hauv cov hmoov zoo uas tuaj yeem hloov pauv hauv dej, rov tsim cov khoom qub polymer dispersion. Thaum ntxiv rau cov hmoov sib tov qhuav, RDP reactivates thaum sib cuag nrog dej, tsim ib homogeneous thiab ruaj khov zaj duab xis nyob rau hauv cov nplaum matrix.
Txhim khu kev tiv thaiv dej
Zaj duab xis tsim: Raws li hydration, RDP particles coalesce los ua ib tug nruam polymer zaj duab xis thoob plaws hauv cov nplaum matrix. Cov yeeb yaj kiab no ua raws li kev thaiv, txo qhov porosity thiab dej permeability ntawm cov nplaum. Cov yeeb yaj kiab thaiv cov kab capillary, tiv thaiv cov dej nkag thiab txhim kho cov nplaum tag nrho cov dej tsis muaj peev xwm.
Hydrophobic Properties: Ntau RDP formulations suav nrog hydrophobic agents lossis modifiers uas ntxiv dag zog rau dej. Cov khoom siv hydrophobic no txo cov dej nqus ntawm cov nplaum, ua kom muaj kev ua haujlwm ntev txawm tias nyob hauv cov dej ntub dej.
Txhim kho Cohesion thiab Flexibility: RDP txhim kho kev sib koom ua ke ntawm cov nplaum, txhim kho nws cov nyiaj tau los thiab hloov tau yooj yim. Qhov kev hloov pauv no yog qhov tseem ceeb hauv kev tiv thaiv kev tsim cov kab nrib pleb thiab qhov khoob uas tuaj yeem tso dej nkag mus. Cov nplaum nplaum uas tuaj yeem ua kom haum thermal expansion thiab contraction yam tsis muaj cracking tswj nws txoj kev ncaj ncees thiab dej tsis kam dhau sijhawm.
Txhim khu kev tiv thaiv huab cua
UV Stability: RDP formulations feem ntau tsim los tiv thaiv degradation los ntawm ultraviolet (UV) lub teeb. Cov yeeb yaj kiab polymer tsim los ntawm RDP yog UV ruaj khov, tiv thaiv cov nplaum nplaum los ntawm kev phom sij ntawm lub hnub raug lub hnub ntev. Qhov kev ruaj ntseg no ua kom ntseeg tau tias cov nplaum tuav nws lub zog thiab elasticity txawm tias tom qab raug tshav ntuj ntev.
Thermal Resistance: Cov ntaub ntawv tsim kho yuav raug hloov pauv ntawm qhov kub thiab txias, uas tuaj yeem ua rau kev nthuav dav thiab kev cog lus. RDP-modified adhesives pom zoo thermal tsis kam, tswj lawv cov ntawv cog lus lub zog thiab yoog raws thoob plaws qhov kub thiab txias. Cov cuab yeej no tiv thaiv cov nplaum los ntawm kev ua nkig nyob rau hauv huab cua txias los yog muag heev nyob rau hauv kub kub, yog li txhim kho nws cov huab cua tsis kam.
Resistance to Freeze-Thaw Cycles: Nyob rau hauv cov huab cua txias, cov ntaub ntawv raug rov qab khov-thaw voj voog, uas tuaj yeem ua rau puas tsuaj. Qhov yooj yim thiab cohesion muab los ntawm RDP pab adhesives tiv thaiv cov voj voog no yam tsis poob kev ncaj ncees. Cov zaj duab xis polymer ua raws li kev poob siab absorber, txo cov kev ntxhov siab los ntawm kev khov thiab thawing.
Kev siv tswv yim
Sab nrauv Rwb thaiv tsev thiab Finish Systems (EIFS): RDP feem ntau siv hauv EIFS, qhov dej thiab huab cua tsis kam yog qhov tseem ceeb. Cov hmoov polymer ua kom ntseeg tau tias cov nplaum nplaum hauv cov tshuab no tuaj yeem tiv taus cov dej noo infiltration thiab tiv taus cov huab cua sib txawv, tiv thaiv cov qauv kev ncaj ncees thiab rwb thaiv tsev ntawm lub cev.
Pobzeb Adhesives thiab Grouts: Nyob rau hauv ob qho tib si sab hauv thiab sab nrauv daim ntaub ntawv, pobzeb adhesives thiab grouts hloov nrog RDP qhia superior kev ua tau zoo. Lawv tiv thaiv dej nkag thiab tiv thaiv cov vuas los ntawm kev xoob lossis puas vim huab cua. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau sab nraum zoov qhov chaw uas cov vuas raug los nag, Frost, thiab tshav ntuj ncaj qha.
Kho Mortars thiab Patching Compounds: Rau kev kho pob zeb thiab patching, RDP txhim kho cov khoom siv kho kom ruaj khov. Nws ua kom ntseeg tau tias cov ntaub ntawv no ua tau zoo rau cov pob zeb uas twb muaj lawm, muab cov dej tsis zoo thiab huab cua tiv thaiv uas ua rau lub neej ntev ntawm kev kho.
Environmental thiab Economic Benefits
Extended Lifespan: Los ntawm kev txhim kho dej thiab huab cua tiv thaiv, RDP txuas ntxiv lub neej ntawm kev tsim cov nplaum thiab cov qauv uas lawv tau siv rau hauv.
Kev Siv Hluav Taws Xob: Hauv cov ntawv thov xws li EIFS, RDP-txhim kho cov nplaum ua rau muaj kev cuam tshuam zoo dua los ntawm kev tswj xyuas kev ncaj ncees ntawm cov rwb thaiv tsev. Qhov no tuaj yeem ua rau kev txuag hluav taws xob tseem ceeb hauv cov tsev cua sov thiab cua txias, txhawb kev ruaj khov.
Txo Cov Khoom Siv Hluav Taws Xob: Kev siv cov khoom siv ruaj khov, huab cua-resistant adhesives minimizes kev tsim cov khib nyiab tsim los ntawm cov khoom ua tsis tau zoo lossis cov khoom tsis zoo. Qhov no pab txhawb rau kev tsim kho kom ruaj khov thiab txo cov kev cuam tshuam ib puag ncig ntawm kev tsim vaj tsev.
Redispersible polymer hmoov yog ib qho kev hloov pauv ntxiv hauv kev tsim cov nplaum, muab cov dej tseem ceeb thiab huab cua tsis kam. Nws lub peev xwm los tsim cov yeeb yaj kiab tiv thaiv polymer, ua ke nrog cov yam ntxwv hydrophobic thiab txhim kho kev yooj yim, ua rau RDP-hloov cov nplaum nplaum muaj zog tiv thaiv cov teeb meem ntawm ya raws thiab huab cua raug. Los ntawm kev sib koom ua ke RDP rau hauv cov ntaub ntawv tsim kho, cov neeg tsim khoom thiab cov kws tsim khoom tuaj yeem ua kom lub neej ntev, cov qauv ruaj khov uas zoo dua los tiv thaiv ib puag ncig kev ntxhov siab. Qhov no tsis yog tsuas yog txhim kho kev ua tau zoo thiab kev ntseeg siab ntawm kev tsim kho cov phiaj xwm tab sis tseem txhawb nqa kev ruaj khov thiab kev siv nyiaj hauv kev lag luam.
Post lub sij hawm: Jun-03-2024