Redispersible polymer hmoov yog ib qho tseem ceeb additives nyob rau hauv mortars uas txhim khu lub yooj, bonding zog thiab dej tuav cov khoom ntawm cov khoom zaum kawg. Txawm li cas los xij, muaj ntau yam sib txawv ntawm cov khoom siv rov ua dua tshiab ntawm cov khoom siv polymer, thiab xaiv qhov uas haum rau koj cov kev xav tau tshwj xeeb tuaj yeem nyuaj.
Ua ntej, nws yog ib qho tsim nyog yuav tsum nkag siab txog lub luag haujlwm ntawm cov khoom siv hluav taws xob hloov pauv hauv cov tshuaj khib nyiab. Cov khoom no yog copolymer ntawm vinyl acetate thiab ethylene, tshuaj tsuag-qhuav los ntawm aqueous polymer emulsion. Cov hmoov yog tsim los txhim kho cov khoom ntawm mortars, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm saj zawg zog, workability, adhesion thiab dej tuav. Tsis tas li ntawd, nws txhawb cov cement hydration zoo dua, txo qhov kev pheej hmoo ntawm kev tawg, shrinkage thiab plua plav.
Cov hauv qab no yog cov ntsiab lus tseem ceeb uas yuav tsum xav txog thaum xaiv txoj cai redispersible polymer hmoov rau koj daim ntawv thov mortar.
Mortar hom
Thawj qhov yuav tsum xav txog yog hom mortar uas koj npaj yuav siv. Muaj ntau hom mortar, xws li cement-based mortar, txiv qaub-raws li mortar lossis gypsum-based mortar, thiab epoxy resin mortar. Txhua tus muaj nws tus kheej cov khoom tshwj xeeb thiab cov kev cai, uas yuav txiav txim siab txog hom redispersible polymer hmoov yuav raug xaiv. Cement mortars yog qhov ntau tshaj plaws thiab lawv xav tau cov khoom siv rov ua dua tshiab nrog cov dej tuav zoo, kev sib raug zoo thiab kev ua haujlwm.
Txoj kev thov
Daim ntawv thov txoj kev kuj tseem ceeb heev thaum xaiv cov hmoov respersible polymer. Qee cov khoom tsim los siv rau hauv cov khoom sib xyaw qhuav, thaum lwm tus yog tsim rau cov ntaub ntawv ntub dej. Nyob rau hauv qhuav blend formulations, cov hmoov polymer yuav tsum tau disperse sai thiab tusyees los tsim ib tug ruaj khov emulsion nrog dej. Hauv kev sib xyaw ntub dej, cov hmoov polymer yuav tsum muaj qhov zoo rov ua dua thiab muaj peev xwm sib xyaw nrog lwm cov khoom ntxiv thiab cov cement.
Cov kev xav tau ntawm kev ua haujlwm
Cov kev ua tau zoo ntawm cov mortar kuj tseem cuam tshuam rau kev xaiv ntawm cov tshuaj respersible polymer hmoov. Cov ntawv thov sib txawv muaj qhov xav tau sib txawv rau lub zog, yoog raws thiab kav ntev. Piv txwv li, yog tias koj xav ua rau sab nrauv phab ntsa mortar, koj yuav xav tau ib yam khoom uas muaj dej zoo heev thiab khov-thaw stability. Xwb, yog tias koj siv cov nplais nplaum nplaum, koj xav tau cov hmoov polymer redispersible nrog zoo adhesion thiab cohesive zog.
Polymer hmoov muaj zog
Lwm qhov tseem ceeb uas yuav tsum tau xav txog thaum xaiv cov hmoov polymer redispersible yog qhov ua tau zoo ntawm cov khoom. Cov khoom tseem ceeb uas yuav tsum tau saib muaj xws li qhov loj me, iav hloov pauv kub (Tg) thiab cov ntsiab lus khib nyiab. Qhov loj me me ntawm cov hmoov muaj feem cuam tshuam rau nws cov dispersibility thiab kev sib txuas lub zog. Cov khoom me me (tsawg dua 80μm) muab cov dej khaws cia zoo dua, thaum qhov loj me me (ntau dua 250μm) muab kev ua haujlwm zoo dua.
Lub iav hloov pauv kub (Tg) ntawm cov hmoov polymer redispersible txiav txim siab nws yooj yim thiab adhesion. A Tg saum toj no chav tsev kub (25 ° C) txhais tau hais tias cov hmoov yog nruj, thaum Tg hauv qab chav tsev kub txhais tau tias cov hmoov yog hloov tau. Redispersible polymer hmoov nrog qis Tg (qis dua -15 ° C) yog qhov zoo tagnrho rau cov huab cua txias uas cov mortars tuaj yeem ua rau lub voj voog khov-thaw.
Thaum kawg, cov ntsiab lus khib nyiab ntawm redispersible polymer hmoov txiav txim siab nws daim ntawv thov tus nqi thiab tus nqi ntawm cov dej xav tau rau kev sib tov. Cov ntsiab lus siab dua (ntau dua 95%) yuav tsum muaj cov hmoov tsawg kom ua tiav cov khoom xav tau, ua rau cov nqi qis dua thiab qis dua.
nyob rau hauv xaus
Xaiv txoj cai redispersible polymer hmoov rau daim ntawv thov mortar yog ib qho tseem ceeb rau kev ua tiav qhov kev ua tau zoo thiab kav ntev ntawm cov khoom kawg. Los ntawm kev txiav txim siab txog hom mortar, kev tsim kho, kev ua tau zoo thiab cov yam ntxwv ntawm cov hmoov polymer, koj tuaj yeem xaiv cov khoom uas ua tau raws li koj cov kev xav tau tshwj xeeb. Nco ntsoov, siv txoj cai redispersible polymer hmoov yuav tsis tsuas txhim kho cov khoom ntawm koj cov mortar, tab sis kuj txo qhov kev pheej hmoo ntawm kev tawg, shrinkage thiab plua plav, uas ua rau lub sij hawm ntev thiab zoo nkauj tiav.
Post lub sij hawm: Sep-14-2023