EPS granular thermal insulation mortar ke sesebelisoa sa ho kenya mocheso se bobebe se kopantsoeng le li- inorganic binders, organic binders, admixtures, additives le light aggregates ka tekanyo e itseng.Har'a EPS granular thermal insulation mortars hajoale e ntse e batlisisoa le ho sebelisoa, e ka sebelisoa hape "Dispersed latex powder" e na le tšusumetso e kholo ts'ebetsong ea seretse 'me e nka karolo e phahameng ka litšenyehelo, kahoo e bile sepheo sa tlhokomelo ea batho.Ts'ebetso ea tlamahano ea seretse sa EPS particle insulation mortar ea kantle ea lebota haholo e tsoa ho polymer binder, mme sebopeho sa eona hangata ke vinyl acetate/ethylene copolymer.Redispersible latex phofo e ka fumanoa ka ho omisa mofuta ona oa polymer emulsion.Ka lebaka la tokiso e nepahetseng, lipalangoang tse bonolo le polokelo e bonolo ea phofo ea latex e ka sebelisoang kahong, phofo e khethehileng e hlephileng ea latex e fetohile mokhoa oa nts'etsopele ka lebaka la ho itokisa hantle, lipalangoang tse bonolo le polokelo e bonolo.Ts'ebetso ea seretse sa EPS particle insulation se itšetlehile haholo ka mofuta le palo ea polymer e sebelisitsoeng.Ethylene-vinyl acetate latex powder (EVA) e nang le lihlahisoa tse phahameng tsa ethylene le boleng bo tlaase ba Tg (mocheso oa mocheso oa khalase) o na le ts'ebetso e ntlafetseng ho latela matla a tšusumetso, matla a tlamahano le ho hanyetsa metsi.
Ntlafatso ea phofo ea latex ts'ebetsong ea seretse e bakoa ke taba ea hore phofo ea latex ke polymer e phahameng ea molek'hule e nang le lihlopha tsa polar.Ha latex phofo e kopantsoe le likaroloana tsa EPS, karolo e seng ea polar ka har'a ketane e kholo ea polymer ea phofo ea latex e tla ba Physical adsorption e tla etsahala ka sebaka se seng sa polar sa EPS.Lihlopha tsa polar tse polymer li lebisitsoe ka ntle holim'a likaroloana tsa EPS, e le hore likaroloana tsa EPS li fetohe ho tloha ho hydrophobicity ho ea ho hydrophilicity.Ka lebaka la ho fetoloa ha bokaholimo ba likaroloana tsa EPS ka phofo ea latex, e rarolla bothata ba hore likaroloana tsa EPS li pepesehela metsi habonolo.Ho phaphamala, bothata ba ho beha seretse se seholo.Ka nako ena, ha samente e eketsoa 'me e kopantsoe, lihlopha tsa polar tse adsorbed holim'a likaroloana tsa EPS li sebelisana le likaroloana tsa samente ebe li kopanya haufi-ufi, e le hore ho sebetsa ha seretse sa EPS ho ntlafatsoe haholo.Sena se bonahala ka taba ea hore likaroloana tsa EPS li kolobisoa habonolo ke pente ea samente, 'me matla a ho kopanya pakeng tsa tse peli a ntlafala haholo.
Emulsion le redispersible latex phofo e ka theha matla a phahameng a tensile le matla a tlamahano holim'a lisebelisoa tse fapaneng ka mor'a hore filimi e thehoe, e sebelisoa e le binder ea bobeli ka seretse ho kopanya le samente, samente le polymer ka ho latellana Fana ka ho bapala ka botlalo ho matla a tšoanang ho ntlafatsa. tshebetso ya seretse.Ka ho shebella microstructure ea lintho tse entsoeng ka polymer-samente, ho lumeloa hore ho eketsoa ha phofo ea morao-rao ea latex ho ka etsa hore polymer e thehe filimi 'me e be karolo ea lerako la lesoba,' me e etse hore seretse se be le sebopeho se feletseng ka matla a ka hare, e ntlafatsang matla a ka hare a seretse.Matla a polymer, ka hona a ntlafatsa khatello ea maikutlo ea seretse le ho eketsa khatello ea mantlha.Ho ithuta ts'ebetso ea nako e telele ea phofo ea morao-rao ea latex ka seretse, e ile ea hlokomeloa ke SEM hore ka mor'a lilemo tse 10, microstructure ea polymer ka seretse ha e e-s'o fetohe, ho boloka maqhama a tsitsitseng, matla a ho feto-fetoha le ho hatella le ho thibela metsi hantle.Mokhoa oa sebopeho sa matla a sekhomaretsi sa lithaele o ile oa ithutoa ka phofo ea latex e redispersible, 'me ho ile ha fumanoa hore ka mor'a hore polymer e omisitsoe ka filimi, filimi ea polymer e ile ea theha kamano e feto-fetohang pakeng tsa seretse le tile ka lehlakoreng le leng. ka lehlakoreng le leng, polymer ka seretse e eketsa maemo a moea a seretse mme e ama sebopeho le ho koloba ha bokaholimo, 'me ka mor'a moo nakong ea ts'ebetso ea ho beha polymer e boetse e na le tšusumetso e ntle ts'ebetsong ea hydration le shrinkage ea samente binder, Tsena tsohle li tla thusa ho ntlafatsa matla a tlamo.
Ho kenyelletsa phofo ea latex e ka sebelisoang hape seretseng ho ka ntlafatsa haholo matla a tlamahano le lisebelisoa tse ling, hobane phofo ea hydrophilic latex le karolo ea mokelikeli ea ho emisoa ha samente e kenella ka har'a pores le capillaries ea matrix, 'me phofo ea latex e kenella ka har'a pores le capillaries. .Filimi e ka hare e thehoa 'me e adsorbed ka thata holim'a substrate, kahoo e tiisa matla a matle a maqhama pakeng tsa thepa ea cementitious le substrate.
Nako ea poso: Feb-20-2023