EPS granular thermal insulation mortar yog cov khoom siv rwb thaiv tsev thermal sib xyaw nrog cov inorganic binders, organic binders, admixtures, additives thiab aggregates sib xyaw ua ke hauv qee qhov sib piv. Ntawm cov EPS granular thermal insulation mortars tam sim no tshawb fawb thiab siv, nws tuaj yeem rov ua dua tshiab. Dispersed latex hmoov muaj kev cuam tshuam loj rau kev ua haujlwm ntawm mortar thiab nyob rau hauv feem ntau ntawm tus nqi, yog li nws tau ua rau tib neeg tsom mus rau qhov muag. Kev ua tau zoo ntawm EPS particle insulation mortar sab nraud phab ntsa rwb thaiv tsev system feem ntau yog los ntawm polymer binder, thiab nws cov khoom sib xyaw feem ntau yog vinyl acetate / ethylene copolymer. Redispersible latex hmoov tuaj yeem tau txais los ntawm kev tsuag ziab hom polymer emulsion no. Vim yog kev npaj meej, kev thauj mus los yooj yim thiab kev khaws cia yooj yim ntawm redispersible latex hmoov hauv kev tsim kho, tshwj xeeb xoob latex hmoov tau dhau los ua qhov kev loj hlob vim nws qhov kev npaj meej, kev thauj mus los yooj yim thiab kev khaws cia yooj yim. Kev ua tau zoo ntawm EPS particle insulation mortar nyob ntawm hom thiab ntau npaum li cas ntawm polymer siv. Ethylene-vinyl acetate latex hmoov (EVA) nrog cov ntsiab lus ethylene siab thiab Tg qis (iav hloov pauv kub) tus nqi muaj kev ua tau zoo dua hauv kev cuam tshuam lub zog, kev sib txuas lub zog thiab kev tiv thaiv dej.
Qhov kev ua kom zoo dua ntawm cov hmoov latex rau kev ua haujlwm ntawm cov mortar yog vim qhov tseeb tias cov hmoov latex yog cov polymer molecular siab nrog cov pawg polar. Thaum cov hmoov latex sib xyaw nrog cov khoom EPS, qhov tsis yog-polar hauv cov saw hlau tseem ceeb ntawm cov hmoov latex polymer yuav muaj kev nqus dej lub cev nrog rau qhov tsis yog-polar ntawm EPS. Cov pawg polar hauv cov polymer tau taw qhia sab nraud ntawm qhov chaw ntawm cov khoom EPS, yog li cov khoom EPS hloov pauv ntawm hydrophobicity mus rau hydrophilicity. Vim yog kev hloov pauv ntawm qhov chaw ntawm cov khoom EPS los ntawm cov hmoov latex, nws daws qhov teeb meem uas cov khoom EPS yooj yim raug dej. Floating, qhov teeb meem ntawm cov txheej loj ntawm mortar. Lub sijhawm no, thaum cement ntxiv thiab sib xyaw, cov pawg polar adsorbed ntawm qhov chaw ntawm cov khoom EPS cuam tshuam nrog cov khoom cement thiab sib xyaw ua ke, yog li qhov ua haujlwm ntawm EPS rwb thaiv tsev mortar tau zoo dua. Qhov no yog qhov cuam tshuam hauv qhov tseeb tias cov khoom EPS tau yooj yim ntub los ntawm cov cement paste, thiab lub zog sib txuas ntawm ob qho tau zoo dua.
Cov hmoov emulsion thiab cov hmoov latex uas tawg ua tej daim me me tuaj yeem ua rau muaj zog tensile thiab lub zog sib txuas ntawm cov ntaub ntawv sib txawv tom qab tsim zaj duab xis, lawv siv ua tus binder thib ob hauv mortar los sib xyaw nrog cov cement inorganic binder, cement thiab polymer feem. Muab kev ua si tag nrho rau lub zog sib xws los txhim kho kev ua tau zoo ntawm mortar. Los ntawm kev soj ntsuam cov qauv me me ntawm cov khoom siv polymer-cement sib xyaw, nws ntseeg tias kev ntxiv cov hmoov latex uas tawg ua tej daim me me tuaj yeem ua rau cov polymer tsim zaj duab xis thiab dhau los ua ib feem ntawm phab ntsa qhov, thiab ua rau cov mortar tsim tag nrho los ntawm lub zog sab hauv, uas txhim kho lub zog sab hauv ntawm cov mortar. Lub zog polymer, yog li txhim kho kev ntxhov siab ntawm cov mortar thiab ua rau muaj kev ntxhov siab ntau ntxiv. Txhawm rau kawm txog kev ua tau zoo mus sij hawm ntev ntawm cov hmoov latex uas tawg ua tej daim me me hauv mortar, nws tau pom los ntawm SEM tias tom qab 10 xyoo, cov qauv me me ntawm cov polymer hauv mortar tsis tau hloov pauv, tswj kev sib txuas ruaj khov, lub zog flexural thiab compressive thiab kev tiv thaiv dej zoo. Cov txheej txheem tsim ntawm lub zog nplaum ntawm cov pobzeb tau kawm ntawm cov hmoov latex uas rov ua dua tshiab, thiab nws tau pom tias tom qab cov polymer tau qhuav rau hauv zaj duab xis, cov zaj duab xis polymer tau tsim kev sib txuas yooj ywm ntawm cov mortar thiab cov pobzeb ntawm ib sab tes, thiab ntawm qhov tod tes, Cov polymer hauv cov mortar ua rau cov huab cua ntawm cov mortar nce thiab cuam tshuam rau kev tsim thiab ntub dej ntawm qhov chaw, thiab tom qab ntawd thaum lub sijhawm teeb tsa cov polymer kuj muaj kev cuam tshuam zoo rau cov txheej txheem hydration thiab shrinkage ntawm cov cement hauv cov binder, Tag nrho cov no yuav pab txhim kho lub zog sib txuas.
Ntxiv cov hmoov latex uas tawg tau dua rau hauv cov mortar tuaj yeem txhim kho lub zog sib txuas nrog lwm cov ntaub ntawv, vim tias cov hmoov latex hydrophilic thiab cov kua dej ntawm cov cement suspension nkag mus rau hauv cov qhov hws thiab cov hlab ntsha ntawm lub matrix, thiab cov hmoov latex nkag mus rau hauv cov qhov hws thiab cov hlab ntsha. Cov zaj duab xis sab hauv yog tsim thiab adsorbed khov kho rau ntawm qhov chaw ntawm lub substrate, yog li ua kom muaj lub zog sib txuas zoo ntawm cov khoom siv cementitious thiab lub substrate.
Lub sijhawm tshaj tawm: Lub Ob Hlis-20-2023