Re-Dispersible polymer hmoovyog cov tshuaj tsuag-qhuav emulsions uas, thaum tov nrog dej los yog dej nyob rau hauv ib lub mortar, tsim tib yam ruaj khov dispersion raws li tus thawj emulsion. Cov polymer tsim ib lub network qauv hauv cov mortar, uas zoo ib yam li cov khoom siv polymer emulsion thiab hloov cov mortar. Tus yam ntxwv ntawm dispersible polymer hmoov yog tias cov hmoov no tsuas yog dispersed ib zaug, thiab nws yuav tsis tau dispersed dua thaum lub mortar yuav ntub dua tom qab hardening. Lub invention ntawm redispersible polymer hmoov tau zoo txhim kho kev ua tau zoo ntawm qhuav hmoov mortar. Nyob rau hauv lub tsev cog khoom mortar rau cov vaj huam sib luag zoo nkauj, muaj ntau qhov yuav tsum tau ua rau tus nqi ntawm cov khoom siv polymer latex. Nws qhov sib ntxiv txhim kho lub zog flexural, tawg tsis kam, adhesion lub zog, elasticity thiab toughness ntawm mortar, uas yuav zam tau. Mortar shrinkage thiab cracking kuj tuaj yeem txo cov thickness ntawm cov txheej txheem. Lub redispersible polymer latex hmoov tuaj yeem txhim kho cov khoom saum toj no ntawm mortar vim nws tuaj yeem tsim ib zaj duab xis polymer rau ntawm qhov chaw ntawm cov tshuaj khib nyiab. Muaj cov pores nyob rau saum npoo ntawm zaj duab xis, thiab qhov chaw ntawm lub qhov hws yog ntim nrog mortar, uas txo cov kev ntxhov siab concentration thiab txo cov quab yuam sab nraud. Nyob rau hauv qhov kev txiav txim yuav tsim kev so tsis muaj kev puas tsuaj. Tsis tas li ntawd, cov mortar tsim cov pob txha txha nraub qaum tom qab cov cement hydration, thiab cov yeeb yaj kiab tsim los ntawm cov polymer tuaj yeem txhim kho elasticity thiab toughness ntawm cov pob txha txhav, thiab cov respersible polymer latex hmoov kuj tuaj yeem txhim kho lub zog tensile ntawm lub mortar.
Lub lubricating nyhuv ntawm cov redispersible polymer hmoov hais enables lub Cheebtsam ntawm lub mortar ntws ntawm nws tus kheej. Nyob rau tib lub sijhawm, nws muaj cov nyhuv inductive ntawm huab cua, muab cov mortar compressibility, yog li nws tuaj yeem txhim kho kev tsim kho thiab kev ua haujlwm ntawm mortar. Lub zog compressive ntawm polymer mortar txo qis nrog qhov nce ntawm cov ntsiab lus ntawm roj hmab hmoov, lub zog flexural nce nrog qhov nce ntawm cov ntsiab lus ntawm cov hmoov roj hmab, thiab qhov sib piv-folding qhia tau hais tias kev poob qis.
Qhov kev ntsuam xyuas qhia tau hais tias cov hmoov redispersible latex tuaj yeem hloov kho cov mortar thiab tuaj yeem ua kom pom tseeb ntawm kev hloov pauv ntawm mortar. Redispersible latex hmoov polymer resin tuaj yeem txhim kho lub zog flexural ntawm mortar, tshwj xeeb tshaj yog thaum ntxov flexural zog ntawm mortar. Lub polymer aggregates nyob rau hauv lub capillary pores ntawm lub hardened mortar thiab ua raws li ib tug ntxiv dag zog. Qhov sib ntxiv ntawm cov hmoov polymer dispersible tuaj yeem txhim kho qhov kev sib raug zoo ntawm mortars, tshwj xeeb tshaj yog thaum sib txuas cov ntaub ntawv sib txawv, xws li rau adhering ceramic vuas. Nrog rau qhov nce ntawm cov roj hmab hmoov, lub zog flexural thiab cov nplaum nplaum kuj nce ntxiv.
Kev sib koom ua ke ntawm cov hmoov polymer redispersible tuaj yeem txhim kho qhov yooj yim thiab deformation tsis kam ntawm cov khoom, yog li nws txhawb nqa lub zog flexural thiab kev sib txuas ntawm cov khoom. Tom qab ntxiv cov polymer rau cov cement matrix, lub zog tensile yuav zoo heev. Thaum lub sij hawm hardening txheej txheem ntawm cement, yuav muaj ntau kab noj hniav nyob rau hauv. Cov kab noj hniav no puv nrog dej thaum pib. Thaum cov cement yog kho thiab qhuav, cov khoom no ua kab noj hniav. Nws feem ntau suav hais tias cov kab noj hniav no yog cov ntsiab lus tsis muaj zog ntawm cov cement matrix. ib feem. Thaum cov hmoov polymer redispersible muaj nyob rau hauv cov cement system, cov hmoov yuav tam sim ntawd disperse thiab mloog zoo nyob rau hauv cov dej-nplua nuj cheeb tsam, uas yog, nyob rau hauv cov kab noj hniav. Tom qab cov dej dries. Cov polymer ua ib zaj duab xis nyob ib ncig ntawm cov kab noj hniav, yog li ntxiv dag zog rau cov ntsiab lus tsis muaj zog. Ntawd yog, ntxiv me me ntawm redispersible latex hmoov tuaj yeem txhim kho lub zog ntawm daim ntawv cog lus.
Post lub sij hawm: Oct-25-2022