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.
The microstructure ea polymer ka seretse ha e e-s'o fetohe ka nako e telele, 'me e boloka bonding tsitsitseng, flexural le compressive matla, le molemo hydrophobicity.Mochini oa sebopeho sa "latex powder" o ka sebelisoang hape ka matla a likhomaretsi tsa lithaele o fumane hore ka mor'a hore polymer e omelle filiming, filimi ea polymer e theha khokahano e feto-fetohang pakeng tsa seretse le thaele ka lehlakoreng le leng, 'me ka lehlakoreng le leng, polymer ka lehlakoreng le leng. seretse se secha Eketsa boemo ba moea ba seretse mme se ama sebopeho le ho koloba ha bokaholimo, 'me joale nakong ea ts'ebetso ea ho seta, polymer e boetse e na le tšusumetso e ntle ts'ebetsong ea hydration le shrinkage ea samente ho binder, e tla kenya letsoho. ho ntlafatsa matla a Bond a na le thuso e betere.
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 tsitsitse ka thata holim'a substrate, kahoo e tiisa matla a maqhama a matle pakeng tsa lisebelisoa tsa cementitious le substrate.
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.E phaphametseng, 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.
Nako ea poso: Mar-18-2023