Raws li ib qho tseem ceeb polymer additive,redispersible polymer hmoov (RDP)yog dav siv nyob rau hauv tshwj xeeb qhuav mortar (xws li pobzeb adhesives, plaster mortars, pem teb kho cov ntaub ntawv, thiab lwm yam), feem ntau yog siv los txhim kho kev ua tau zoo ntawm mortar. Nws yog cov hmoov dawb, feem ntau yog ua los ntawm cov tshuaj tsuag kom qhuav ntawm polymer emulsion. Nws ntxiv rau cov mortar qhuav tuaj yeem tsis tsuas yog txhim kho kev sib raug zoo ntawm mortar, tab sis kuj txhim kho nws cov kev tsim kho thiab kev ua haujlwm ntev, uas muaj qhov tseem ceeb ntawm kev ua haujlwm thiab kev siv tus nqi.
1. Cov khoom ntawm redispersible latex hmoov
Redispersible latex hmoov yog qhov tseem ceeb ntawm cov khoom siv polymer nrog cov dej solubility zoo. Thaum cov dej ntxiv, nws tuaj yeem hloov pauv los ua ib qho emulsion, yog li muab cov tshuaj khib nyiab zoo dua lub cev. Cov polymers sib txawv (xws li acrylic acid, vinyl acetate, chloroprene, thiab lwm yam) tuaj yeem tsim ntau hom redispersible latex hmoov nrog cov yam ntxwv sib txawv. Nws cov txiaj ntsig tseem ceeb suav nrog:
Txhim kho adhesion: Redispersible latex hmoov tuaj yeem txhim kho qhov adhesion ntawm qhuav mortar thiab substrate (xws li cov vuas, pob zeb, pob zeb, thiab lwm yam), thiab txhim kho kev tsim kho ntawm mortar.
Txhim kho kev yooj yim: Cov tshuaj khib nyiab nrog cov hmoov ntxiv rov ua dua tshiab yog qhov muaj zog dua thiab hloov tau, tuaj yeem hloov kho me me deformations, thiab tsis txhob tawg.
Txhim khu kev tiv thaiv dej thiab huab cua tsis kam: Hom polymer no tuaj yeem txhim kho kev ruaj ntseg ntawm mortar hauv dej ib puag ncig, txhim kho nws cov permeability tsis kam thiab huab cua tsis kam, thiab tshwj xeeb tshaj yog tsim rau cov ntawv thov hauv cov phab ntsa sab nrauv thiab cov av noo ib puag ncig.
Txhim kho fluidity thiab ua haujlwm tau zoo: Redispersible latex hmoov tuaj yeem kho cov dej ntws thiab kev tsim kho ntawm mortar, ua kom yooj yim rau kev tsim thiab tsis txhob muaj dej loj.
2. Lub luag hauj lwm ntawm redispersible latex hmoov nyob rau hauv tshwj xeeb qhuav mortar
Cov mortar qhuav tshwj xeeb feem ntau yog hom mortar tsim los ua kom tau raws li kev tsim kho tshwj xeeb, suav nrog tab sis tsis txwv rau kev kho hauv pem teb mortar, pobzeb nplaum, sab nrauv phab ntsa rwb thaiv tsev mortar, qhuav hmoov txheej, thiab lwm yam. Lawv feem ntau xav tau lub cev thiab tshuaj zoo dua li cov tshuaj khib nyiab. Lub luag hauj lwm ntawm redispersible latex hmoov nyob rau hauv cov khoom no yog feem ntau tshwm sim nyob rau hauv cov nram qab no yam:
2.1 Txhim kho kev sib raug zoo
Hauv cov nplais nplaum, kev sib txuas ntawm cov vuas thiab substrates yog qhov tseem ceeb tshwj xeeb. Tshwj xeeb tshaj yog nyob rau hauv qee qhov chaw ntub dej, txias lossis huab cua kub, kev ruaj ntseg ntawm kev sib txuas ncaj qha cuam tshuam rau cov khoom siv ntev. Ntxiv cov hmoov latex redispersible rau mortar tuaj yeem txhim kho kev sib raug zoo ntawm mortar, tshwj xeeb tshaj yog nyob rau ntawm qhov chaw xws li cov vuas, pob zeb lossis marble, kom tsis txhob tev ntawm cov txheej txheej los ntawm thermal expansion thiab contraction lossis ya raws.
2.2 Txhim kho qhov tawg tsis kam
Qhov sib ntxiv ntawm redispersible latex hmoov tuaj yeem txhim kho qhov yooj yim ntawm mortar thiab tsis txhob muaj cov kab nrib pleb thaum nws qhuav, kub hloov lossis raug kev nyuaj siab ntawm lub cev. Rau cov ntawv thov xws li sab nrauv phab ntsa kho mortar thiab elastic plaster mortar, kev siv cov tshuaj redispersible latex hmoov tuaj yeem txhim kho kev tawg.
2.3 Txhim kho dej tsis kam
Lub redispersible latex hmoov nyob rau hauv qhuav mortar tuaj yeem txhim kho nws cov dej tsis kam thiab tiv thaiv kev nkag mus. Nyob rau hauv qhov chaw ntub dej xws li chav dej thiab chav ua noj, cov nplais nplaum thiab lwm yam khoom siv dej tsis zoo yuav tsum muaj qhov thaiv kom muaj zog dua. Tom qab ntxiv cov hmoov latex redispersible, cov mortar tuaj yeem tiv taus cov dej noo zoo dua thiab ua kom nws lub neej ua haujlwm ntev.
2.4 Txhim kho kev ua haujlwm ntawm mortar
Kev ua haujlwm ntawm mortar ncaj qha cuam tshuam rau kev tsim kho thiab kev tsim kho cov neeg ua haujlwm zoo. Qhov sib ntxiv ntawm redispersible latex hmoov tuaj yeem txhim kho kev ua haujlwm ntawm mortar, tshwj xeeb tshaj yog thaum txheej txheej, nrog cov dej ntws zoo dua thiab kho kom haum, ua rau kev tsim kho smoother thiab txo qhov tshwm sim ntawm cov dej seepage.
2.5 Txhim kho khov-thaw tsis kam
Hauv qee qhov kev siv tshwj xeeb, xws li sab nrauv phab ntsa rwb thaiv tsev mortar thiab qee qhov kev kho av sab nraum zoov mortar, khov-thaw kuj tseem ceeb heev. Tom qab ntxiv cov hmoov latex redispersible, qhov khov-thaw tsis kam ntawm mortar yog txhim kho, uas tuaj yeem tiv thaiv kev tawg thiab kev puas tsuaj nyob rau hauv qhov kub thiab txias ib puag ncig thiab hloov mus rau qhov kev xav tau ntawm cov chaw txias.
3. Cov piv txwv ntawm daim ntawv thov
3.1 Pobzeb nplaum
Nyob rau hauv cov pobzeb nplaum, daim ntawv thov ntawm redispersible latex hmoov tuaj yeem txhim kho kev sib raug zoo ntawm mortar, tshwj xeeb tshaj yog muaj zog adhesion rau phab ntsa vuas thiab cov vuas hauv pem teb. Thaum tso cov vuas rau hauv av lossis phab ntsa, cov nplaum nplaum feem ntau yuav tsum muaj kev sib raug zoo, lub sijhawm qhib ntev thiab dej tsis kam. Qhov sib ntxiv ntawm redispersible latex hmoov ua rau cov pobzeb nplaum kom ncav cuag lub zog txaus, thaum txhim kho nws txoj kev tsim kho kom ruaj khov thiab kav ntev.
3.2 Sab nrauv phab ntsa rwb thaiv tsev mortar
Sab nrauv phab ntsa rwb thaiv tsev mortar yog siv rau kev kho rwb thaiv tsev ntawm cov phab ntsa sab nrauv ntawm cov tsev thiab xav tau kom muaj kev tiv thaiv khov-thaw, dej tsis kam thiab tawg tsis kam. Qhov sib ntxiv ntawm redispersible latex hmoov txhim kho qhov yooj thiab dej tsis kam ntawm cov tshuaj khib nyiab, yog li tsis txhob muaj teeb meem xws li tawg thiab tawg ntawm cov txheej rwb thaiv tsev, thiab txuas ntxiv lub neej kev pab cuam ntawm lub tsev sab nrauv phab ntsa.
3.3 Pem teb kho mortar
Pem teb kho mortar yog siv nyob rau hauv ntau yam kev kho hauv pem teb thiab kho kev tsim kho, tshwj xeeb tshaj yog kev kho dua tshiab ntawm cov plag tsev qub. Los ntawm kev ntxiv cov hmoov latex redispersible, qhov adhesion, fluidity thiab saj zawg zog ntawm cov mortar yog txhim kho, kom ntseeg tau tias cov khoom siv kho hauv pem teb tuaj yeem tsim tau zoo thiab ua haujlwm tau zoo thiab muaj kev ruaj ntseg mus ntev.
Raws li ib qho tseem ceeb additive rau tshwj xeeb qhuav mortar,redispersible latex hmoovplays lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm mortar, txhim kho nws cov adhesion, dej tsis kam thiab tawg tsis kam. Ntawm cov khoom sib txawv ntawm cov khoom tshwj xeeb qhuav mortar, nws lub luag haujlwm thiab qhov zoo tau dhau los ua qhov tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov ntawm cov nplais nplaum, sab nrauv phab ntsa rwb thaiv tsev mortars thiab kho hauv pem teb mortars. Raws li kev tsim kho kev lag luam txuas ntxiv nce nws cov kev xav tau rau kev ua haujlwm ntawm cov khoom siv, kev siv cov hmoov latex redispersible yuav ua ntau dua.
Post lub sij hawm: Mar-03-2025