Redispersible latex phofo le tse ling tse binders inorganic (tse kang samente, slaked lime, gypsum, joalo-joalo) le aggregates tse fapa-fapaneng, li-fillers le li-additives tse ling (tse kang methyl hydroxypropyl cellulose ether, starch ether, lignocellulose, hydrophobic agent, joalo-joalo) bakeng sa ho kopanya 'meleng ho etsa mortar. Ha seretse se omileng se kopantsoeng se eketsoa metsing 'me se tsosoa, likaroloana tsa phofo tsa latex li tla hasanngoa ka metsing tlas'a ketso ea hydrophilic protective colloid le mechanical shear. Nako e hlokahalang bakeng sa phofo e tloaelehileng ea latex e qhalakantsoeng e khutšoanyane haholo, 'me index ena ea nako ea redispersion e boetse e le parameter ea bohlokoa ho hlahloba boleng ba eona. Nakong ea pele ea ho kopanya, phofo ea latex e se e qalile ho ama rheology le ho sebetsa ha seretse.
Ka lebaka la litšobotsi tse fapaneng le liphetoho tsa phofo e 'ngoe le e' ngoe e arohaneng ea latex, phello ena e boetse e fapane, tse ling li na le phello e thusang ho phalla, 'me tse ling li na le phello e ntseng e eketseha ea thixotropy. Mokhoa oa ts'usumetso ea eona o tsoa likarolong tse ngata, ho kenyelletsa le tšusumetso ea phofo ea latex ka kamano ea metsi nakong ea ho hasana, tšusumetso ea viscosity e fapaneng ea phofo ea latex ka mor'a ho qhalakanngoa, tšusumetso ea colloid e sireletsang, le tšusumetso ea samente le mabanta a metsi. Litšusumetso li kenyelletsa ho eketseha ha moea ka har'a seretse le ho ajoa ha li-bubble tsa moea, hammoho le tšusumetso ea li-additives tsa eona le ho sebelisana le lisebelisoa tse ling. Ka hona, khetho e ikhethileng le e arohaneng ea phofo ea latex e ka sebelisoang hape ke mokhoa oa bohlokoa oa ho ama boleng ba sehlahisoa. Maikutlo a tloaelehileng haholo ke hore phofo ea morao-rao ea latex hangata e eketsa moea oa seretse, ka hona e tlotsa kaho ea seretse, le kamano le viscosity ea phofo ea latex, haholo-holo colloid e sireletsang, ho nosetsa ha e qhalakanngoa. Ka mor'a moo, seretse se metsi se nang le phallo ea phofo ea latex se sebelisoa sebakeng sa mosebetsi. Ka ho fokotseha ha metsi ka mekhahlelo e meraro - ho kenngoa ha lera la motheo, ho sebelisoa ha samente hydration reaction, le volatilization ea metsi a holim'a metsi moeeng, likaroloana tsa resin li atamela butle-butle, li-interfaces li kopana butle-butle, 'me qetellong li fetoha filimi ea polymer e tsoelang pele. Ts'ebetso ena haholo-holo e hlaha ka li-pores tsa seretse le holim'a sepakapaka.
E lokela ho totobatsoa hore e le ho etsa hore ts'ebetso ena e se ke ea etsolloa, ke hore, ha filimi ea polymer e kopana le metsi hape, e ke ke ea qhalakanngoa hape, 'me colloid e sireletsang ea phofo ea latex e redispersible e tlameha ho arohana le tsamaiso ea filimi ea polymer. Sena ha se bothata tsamaisong ea seretse sa samente ea alkaline, hobane e tla ba saponified ke alkali e hlahisoang ke samente hydration, 'me ka nako e ts'oanang, adsorption ea thepa e kang ea quartz e tla e arola butle-butle ho tloha tsamaisong, ntle le ts'ireletso ea hydrophilicity Colloids, e sa qhibilihisitsoeng ka metsing' me e thehoa ke maemo a nako e le 'ngoe a qhalakantsoeng ka nako e le' ngoe, eseng feela tlas'a ts'ebetso e omileng, e seng feela tlas'a ts'ebetso e omileng, e seng feela tlas'a ts'ebetso e omileng. maemo a nako e telele a ho qoelisoa metsing. Litsamaisong tse seng tsa alkaline, joalo ka litsamaiso tsa gypsum kapa li-fillers feela, ka lebaka le itseng, colloid e sirelletsang e ntse e le teng filiming ea ho qetela ea polymer, e amang ho hanyetsa metsi ha filimi, empa hobane litsamaiso tsena ha li sebelisoe molemong oa ho qoelisoa ka nako e telele ka metsing, 'me polymer e ntse e na le thepa ea eona e ikhethang, ha e ame ts'ebeliso ea morao-rao ea phofo ea redisper.
Ka ho thehoa ha filimi ea ho qetela ea polymer, tsamaiso ea moralo e entsoeng ka li-binders tse sa tloaelehang le tse entsoeng ka tlhaho li thehoa ka seretse se phekotsoeng, ke hore, lisebelisoa tsa hydraulic li etsa moralo o brittle le o thata, 'me phofo ea latex e redispersible e etsa filimi pakeng tsa lekhalo le sebaka se tiileng. Khokahano e feto-fetohang. Khokahano ea mofuta ona e ka nahanoa e amana le skeleton e thata ka liliba tse ngata tse nyane. Kaha matla a tsitsitseng a filimi ea resin ea polymer e entsoeng ke phofo ea latex hangata ke taelo ea boholo bo phahameng ho feta ea lisebelisoa tsa hydraulic, matla a seretse ka boeona a ka ntlafatsoa, ke hore, ho ka ntlafatsoa momahano. Kaha ho feto-fetoha ha maemo le ho senyeha ha polymer ho phahame haholo ho feta mohaho o thata o kang samente, ho senyeha ha seretse ho ntlafatsoa, 'me phello ea khatello ea kelello ea ho qhalakanya e ntlafatsoa haholo, kahoo e ntlafatsa ho hanyetsa ho phatloha ha seretse.
Nako ea poso: Mar-07-2023