Redispersible latex hmoov yog cov dej tshwj xeeb emulsion thiab polymer binder ua los ntawm cov tshuaj tsuag kom qhuav nrog yas acetate-ethylene copolymer ua cov khoom siv tseem ceeb. Tom qab ib feem ntawm cov dej evaporates, cov ntaub ntawv polymer tsim ib zaj duab xis polymer los ntawm agglomeration, uas ua raws li ib tug binder. Thaum cov hmoov latex redispersible siv ua ke nrog inorganic gelling minerals xws li cov cement, nws tuaj yeem hloov kho cov tshuaj khib. Lub luag haujlwm tseem ceeb ntawm redispersible latex hmoov yog raws li hauv qab no.
(1) Txhim kho daim ntawv cog lus, lub zog tensile thiab khoov lub zog.
Redispersible latex hmoov tuaj yeem txhim kho lub zog ntawm cov tshuaj khib nyiab. Qhov ntau dua qhov ntxiv, qhov ntau dua qhov nqa. Lub zog sib txuas siab tuaj yeem cuam tshuam qhov shrinkage rau qee qhov, thiab tib lub sijhawm, kev ntxhov siab tsim los ntawm deformation yog ib qho yooj yim rau disperse thiab tso tawm, yog li kev sib txuas lub zog tseem ceeb heev rau kev txhim kho kev tawg. Cov kev tshawb fawb tau pom tias cov nyhuv synergistic ntawm cellulose ether thiab polymer hmoov pab txhim kho lub zog ntawm cov cement mortar.
(2) Txo cov elastic modulus ntawm mortar, kom cov cement mortar nkig muaj qee qhov yooj yim.
Lub elastic modulus ntawm redispersible latex hmoov yog tsawg, 0.001-10GPa; Thaum lub elastic modulus ntawm cement mortar yog siab dua, 10-30GPa, yog li cov elastic modulus ntawm cement mortar yuav txo qis nrog ntxiv ntawm cov hmoov polymer. Txawm li cas los xij, hom thiab tus nqi ntawm cov hmoov polymer kuj muaj qhov cuam tshuam rau cov qauv ntawm elasticity. Feem ntau, raws li qhov piv ntawm polymer rau cement nce, lub modulus ntawm elasticity txo thiab deformability nce.
(3) Txhim kho dej tsis kam, alkali tsis kam, puas thiab cuam tshuam tsis kam.
Lub network membrane qauv tsim los ntawm polymer seals lub qhov thiab cov kab nrib pleb nyob rau hauv cov cement mortar, txo cov porosity ntawm lub cev hardened, thiab yog li txhim kho impermeability, dej tsis kam thiab Frost tsis kam ntawm cov cement mortar. Cov nyhuv no nce ntxiv nrog kev nce polymer-cement piv. Kev txhim kho ntawm kev hnav tsis kam yog cuam tshuam nrog hom polymer hmoov thiab qhov piv ntawm polymer rau cement. Feem ntau, hnav tsis kam txhim kho raws li qhov piv ntawm polymer rau cement nce.
(4) Txhim kho fluidity thiab workability ntawm mortar.
(5) Txhim kho cov dej tuav ntawm mortar thiab txo cov dej evaporation.
Lub polymer emulsion tsim los ntawm dissolving lub redispersible polymer hmoov nyob rau hauv dej yog dispersed nyob rau hauv lub mortar, thiab ib tug nruam organic zaj duab xis yog tsim nyob rau hauv lub mortar tom qab solidification. Cov yeeb yaj kiab organic no tuaj yeem tiv thaiv kev tsiv teb tsaws ntawm cov dej, yog li txo cov dej hauv mortar thiab ua lub luag haujlwm hauv kev tuav dej.
(6) Txo qhov tshwm sim tawg
Lub elongation thiab toughness ntawm polymer hloov cement mortar yog zoo dua li cov cement mortar. Lub flexural kev ua tau zoo yog ntau tshaj 2 npaug ntawm cov cement mortar; Qhov cuam tshuam toughness nce nrog qhov nce ntawm cov polymer cement piv. Nrog rau qhov nce ntawm cov nyiaj ntawm cov hmoov polymer ntxiv, cov nyhuv cushioning hloov tau yooj yim ntawm cov polymer tuaj yeem cuam tshuam lossis ncua kev txhim kho ntawm cov kab nrib pleb, thiab tib lub sijhawm nws muaj kev cuam tshuam zoo rau kev ntxhov siab.
Post lub sij hawm: Jun-20-2023