Lub luag haujlwm ntawmredispersible polymer hmoovhauvkev tsim khokev lag luam tsis tuaj yeem kwv yees.Raws li cov khoom siv dav siv ntxiv, nws tuaj yeem hais tau tias qhov pom ntawm redispersible polymer hmoov tau txhim kho qhov zoo ntawm kev tsim kho los ntawm ntau tshaj ib qib.Lub ntsiab tivthaiv ntawm redispersible polymer hmoov yog cov organic macromolecular polymer nrog cov khoom ruaj khov.Nyob rau tib lub sijhawm, PVA yog ntxiv raws li kev tiv thaiv colloid.Nws yog feem ntau powdery nyob rau hauv chav tsev kub.Lub peev xwm adhesion muaj zog heev thiab kev tsim kho kev tsim kho kuj zoo heev.Tsis tas li ntawd, cov hmoov polymer no tuaj yeem pom tseeb txhim kho qhov hnav tsis kam thiab kev nqus dej ntawm phab ntsa los ntawm kev txhim kho cov cohesion ntawm mortar.Nyob rau tib lub sijhawm, cohesion lub zog thiab deformability kuj yog qhov tseeb.qib kev txhim kho.
Redispersible latex hmoovyog ib qho ntsuab, ib puag ncig tus phooj ywg, lub tsev txuag hluav taws xob, zoo siab ntau lub hom phiaj hmoovkhoom siv tsev, thiab yog ib qho tseem ceeb thiab tseem ceeb functional additive rauqhuav-mixed mortar.Nws tuaj yeem txhim kho kev ua haujlwm ntawm mortar, nce lub zog ntawm mortar, nce lub zog sib txuas ntawm mortar thiab ntau yam substrates, txhim kho qhov yooj thiab ua haujlwm, compressive zog, flexural zog, hnav tsis kam, toughness, thiab viscosity ntawm mortar.Relay thiab dej tuav peev xwm, constructability.Kev ua tau zoo ntawm redispersible latex hmoov hauvdaim nplaum nplaummuaj zog heev, thiab redispersible latex hmoov muaj peev xwm sib txuas thiab cov khoom tshwj xeeb.
Latex hmoovtxhim kho qhov sib xws thiab smoothness ntawm lub system nyob rau hauv lub ntub mixing xeev.Vim yog cov yam ntxwv ntawm cov khoom siv polymer, kev sib koom ua ke ntawm cov khoom sib xyaw ntub dej tau txhim kho zoo heev, thiab nws muaj txiaj ntsig zoo rau kev ua haujlwm;tom qab ziab, nws muabadhesion mus rau qhov du thiab ntom txheej txheej, Txhim kho cov nyhuv cuam tshuam ntawm cov xuab zeb, gravel thiab pores.Nyob rau hauv lub premise ntawm kom ntseeg tau tus nqi ntawm ntxiv, nws muaj peev xwm yuav enriched rau hauv ib zaj duab xis ntawm lub interface, thiaj li hais tias cov pobzeb nplaum muaj ib tug tej yam yooj, txo cov elastic.odulus, thiab absorbs lub thermal deformation kev nyuaj siab mus rau ib tug loj npaum li cas.Nyob rau hauv cov ntaub ntawv ntawm dej immersion nyob rau hauv lub tom ntej theem, yuav muaj kev ntxhov siab xws li dej tsis kam, tsis kub, thiab inconsistent khoom deformation (cov pobzeb deformation coefficient 6 × 10-6 / ℃, cement qhob deformation coefficient 10 × 10-6 / ℃) , thiab txhim kho huab cua tsis kam.
Qhov sib ntxiv ntawm redispersible latex hmoov nyob rau hauv pobzeb adhesives muaj ib tug heev pom tseeb nyhuv ntawm kev txhim kho cov kev ua tau zoo ntawm cement-raws li pobzeb adhesives, thiab muaj kev cuam tshuam tseem ceeb ntawm kev sib txuas lub zog, dej tsis kam, thiab kev laus ntawm cov nplaum.Muaj ntau ntau hom redispersible latex hmoov rau pobzeb adhesives nyob rau hauv kev ua lag luam, xws li acrylic redispersible latex hmoov, styrene-acrylic hmoov, yas acetate-ethylene copolymer, thiab lwm yam .Feem ntau ntawm dispersible latex hmoov yogVinyl acetate-ethylene copolymer.
(1) Raws li tus nqi ntawm cov cement nce, lub zog qub ntawm redispersible latex hmoov rau cov nplais nplaum ntxiv, thiab tib lub sijhawm, lub zog tensile nplaum tom qab immersion hauv dej thiab tensile nplaum lub zog tom qab tshav kub laus kuj nce.
(2) Nrog rau qhov nce ntawm cov nyiaj redispersible latex hmoov rau pobzeb nplaum, tensile daim ntawv cog lus lub zog ntawm redispersible latex hmoov rau cov nplais nplaum tom qab raus hauv dej thiab lub zog tensile zog tom qab tshav kub laus nce raws li, tab sis lub thermal aging tom qab ntawd , lub tensile daim ntawv cog lus lub zog nce ho.
Cov txheej txheem pasting ntawm cov vuas yog cov txheej txheem tuab-txheej txheej, uas yog, ua ntej siv cov mortar zoo tib yam rau tom qab ntawm cov vuas, thiab tom qab ntawd nias cov vuas rau hauv qab txheej.Lub thickness ntawm mortar txheej yog li ntawm 10 mus rau 30mm.Txawm hais tias txoj kev no yog qhov tsim nyog rau kev tsim kho ntawm cov hauv paus tsis sib xws, qhov tsis zoo yog qhov ua haujlwm qis ntawmcov nplais pobzeb, cov kev xav tau siab rau cov neeg ua haujlwm kev txawj ntse, muaj kev pheej hmoo ntawm kev poob vim tsis zoo ntawm cov mortar, thiab nyuaj rau kev kho cov mortar ntawm qhov chaw tsim kho.Kev ua tau zoo yog tswj hwm nruj.Txoj kev no tsuas yog tsim rau cov vuas nrog cov dej nqus dej siab.Ua ntej pasting cov vuas, cov vuas yuav tsum tau tsau rau hauv dej kom ua tiav cov khoom sib txuas txaus.
Post lub sij hawm: Jul-04-2023