Redispersible latex powder yinto eqhelekileyo esetyenziswa kwi-organic gelling material.Ingumgubo ofunyenwe ngokutshiza-yomisa i-emulsion ye-polymer kunye ne-polyvinyl alcohol njenge-colloid ekhuselayo.Lo mgubo unokusasazwa ngokulinganayo emanzini emva kokuhlangana kwamanzi., ukwenza i-emulsion.Ukongeza umgubo we-latex odityanisiweyo unokuphucula ukusebenza kokugcinwa kwamanzi kwidaka le-samente esandula ukuxutywa, kunye nokusebenza kwebhondi, ukuguquguquka, ukungagungqi kunye nokuxhathisa ukubola kodaka lwesamente olukhuni.
Impembelelo ye-latexr powder kukuqina kwebhondi yemathiriyeli esekwe kwisamente
I-Emulsion kunye ne-latex powder ehlaziywayo inokwenza amandla aphezulu kunye namandla okudibanisa kwizinto ezahlukeneyo emva kokubunjwa kwefilimu, zisetyenziselwa njengesibini isibophelelo sodaka ukudibanisa ne-samente ye-inorganic binder, i-samente kunye ne-polymer ngokulandelelana Nika umdlalo opheleleyo kumandla ahambelanayo ukusebenza kodaka.Ngokuqwalasela i-microstructure ye-polymer-cement composite material, kukholelwa ukuba ukongezwa kwe-latex powder edibeneyo kunokwenza ukuba i-polymer yenze ifilimu kwaye ibe yinxalenye yodonga lomngxuma, kwaye yenze udaka lube yinto yonke ngokusebenzisa amandla angaphakathi. ephucula amandla angaphakathi odaka.Amandla epolymer, ngaloo ndlela aphucula ukungaphumeleli koxinzelelo lodaka kunye nokwandisa uxinzelelo lokugqibela.Ukusebenza kwexesha elide le-latex powder edibeneyo kwi-mortar yafundwa.Kwaphawulwa yi-SEM ukuba emva kweminyaka eyi-10, i-microstructure ye-polymer kumdaka ayizange itshintshe, kwaye ukudibanisa okuzinzileyo, ukuguquguquka kunye nokunyanzeliswa kwengcinezelo kuye kwagcinwa.amandla kunye nokugxotha kakuhle kwamanzi.I-latex powder ehlaziywayo ifunde indlela yokwakheka kwamandla okunamathela kwi-tile, kwaye yafumanisa ukuba emva kokuba i-polymer yomile kwaye yenziwe ifilimu, ifilimu ye-polymer yenza uxhulumaniso oluguquguqukayo phakathi kodaka kunye nethayile kwelinye icala, kwaye kwelinye icala. Ngakolunye uhlangothi, udaka olutsha I-polymer ephakathi yonyusa umxholo womoya wodaka kwaye ichaphazela ukubunjwa kunye nokumanzi komphezulu, kwaye emva koko ngexesha lenkqubo yokumisela, i-polymer nayo inempembelelo engcono kwinkqubo yokufakwa kwamanzi kunye nokushwabana kwesamente kwi. i-binder, zonke Ezi ziya kunceda ukuphucula amandla ebhondi.
Ukongeza umgubo we-latex ophinda uhlawulwe kwidaka kunokuphucula kakhulu amandla okudibanisa kunye nezinye izinto, kuba i-hydrophilic latex powder kunye nesigaba solwelo sokumiswa kwesamente singena kwiipores kunye ne-capillaries ye-matrix, kwaye i-latex powder ingena kwi-pores kunye ne-capillaries. .Ifilimu yangaphakathi yenziwe kwaye igxininiswe ngokuqinileyo kumphezulu we-substrate, ngaloo ndlela iqinisekisa amandla okubambisana okuhle phakathi kwezinto ze-cementitious kunye ne-substrate.
Ukulungiswa kwe-latex powder ekusebenzeni kodaka kubangelwa ukuba i-latex powder iyipolymer ephezulu ye-molecular kunye namaqela e-polar.Xa i-latex powder ixutywe kunye neengqungquthela ze-EPS, icandelo elingekho kwi-polar kwikhonkco eliphambili le-polymer ye-latex powder iya kuba I-adsorption ye-Physical iya kwenzeka kunye ne-non-polar surface ye-EPS.Amaqela e-polar kwi-polymer ajoliswe ngaphandle kwinqanaba le-EPS, ukwenzela ukuba iinqununu ze-EPS zitshintshe ukusuka kwi-hydrophobicity ukuya kwi-hydrophilicity.Ngenxa yokuguqulwa kwendawo yeengqungquthela ze-EPS nge-latex powder, ixazulula ingxaki yokuba iinqununu ze-EPS zibonakaliswe ngokulula emanzini.Ukudada, ingxaki yokwaleka okukhulu kodaka.Ngeli xesha, xa i-samente yongezwa kwaye ixutywe, amaqela e-polar adsorbed kumphezulu weengqungquthela ze-EPS zidibanisa kunye neengqungquthela ze-cement kwaye zidibanise ngokusondeleyo, ukwenzela ukuba ukusebenza kodaka lwe-EPS kuphuculwe kakhulu.Oku kubonakaliswa kwinto yokuba iinqununu ze-EPS zimanziswa ngokulula nge-samente paste, kwaye amandla okudibanisa phakathi kwezi zibini aphuculwe kakhulu.
Ixesha lokuposa: Mar-14-2023