I-EPS granular thermal insulation mortar yimathiriyeli yokugquma ye-thermal ekhaphukhaphu exutywe nezibophelelo ezingaphiliyo, izibophelelo eziphilayo, imixube, izongezelelo kunye neeaggregates zokukhanya ngokomlinganiselo othile. Phakathi kwee-EPS ze-granular thermal insulation mortars eziphandiweyo ngoku kwaye zisetyenzisiwe, zinokuphinda zisetyenziswe I-Dispersed latex powder inefuthe elikhulu ekusebenzeni kodaka kwaye ithatha umlinganiselo ophezulu kwiindleko, ngoko ibe yingqwalasela yabantu. Ukusebenza kwebhondi ye-EPS ye-particle particle insulation mortar yangaphandle inkqubo yokugquma eludongeni ikakhulu ivela kwi-polymer binder, kwaye ukwakheka kwayo ubukhulu becala yi-vinyl acetate/ethylene copolymer. I-latex powder ephinda ikwazi ukufumaneka ngokutshiza ngokumisa olu hlobo lwe-polymer emulsion. Ngenxa yokulungiswa okuchanekileyo, ukuthuthwa okufanelekileyo kunye nokugcinwa lula kwe-latex powder ekwakhiweni, i-latex powder ekhethekileyo ekhululekile ibe yindlela yophuhliso ngenxa yokulungiswa kwayo ngokuchanekileyo, ukuhamba ngokufanelekileyo kunye nokugcinwa okulula. Ukusebenza kwe-EPS particle insulation mortar kuxhomekeke kakhulu kuhlobo kunye nobungakanani bepolymer esetyenzisiweyo. I-Ethylene-vinyl acetate latex powder (EVA) enomxholo ophezulu we-ethylene kunye ne-Tg ephantsi (i-glass transition lokushisa) ixabiso linomsebenzi ongcono ngokubhekiselele kumandla empembelelo, amandla ebhondi kunye nokuchasana kwamanzi.
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.
I-Emulsion kunye ne-latex powder ye-redispersible inokwenza amandla aphezulu kunye namandla okudibanisa kwizinto ezahlukeneyo emva kokubunjwa kwefilimu, zisetyenziselwa njenge-binder yesibini kwi-mortar ukudibanisa ne-samente ye-inorganic binder, i-samente kunye ne-polymer ngokulandelanayo Nika umdlalo opheleleyo kumandla ahambelanayo ukuze kuphuculwe ukusebenza kodaka. Ngokuqwalasela i-microstructure ye-polymer-cement composite material, kukholelwa ukuba ukongezwa kwe-latex powder edibeneyo kunokwenza ukuba i-polymer ibe yifilimu kwaye ibe yinxalenye yodonga lomngxuma, kwaye yenza udaka lube lulonke ngokusebenzisa amandla angaphakathi, okuphucula amandla angaphakathi odaka. Amandla epolymer, ngaloo ndlela aphucula ukungaphumeleli koxinzelelo lodaka kunye nokwandisa uxinzelelo lokugqibela. Ukufunda ukusebenza kwexesha elide lomgubo we-latex owenziwe ngokutsha kwi-mortar, kwabonwa yi-SEM ukuba emva kweminyaka eyi-10, i-microstructure ye-polymer kwi-mortar ayizange itshintshe, ukugcina ukudibanisa okuzinzile, ukuguquguquka kunye nokunyanzeliswa kwamandla kunye nokunyanzeliswa kwamanzi okulungileyo. Indlela yokwakheka yamandla okuncamathelisa ithayile yaphononongwa kumgubo welatex odispersible, kwaye kwafunyaniswa ukuba emva kokuba ipolymer yomiswa kwifilimu, ifilimu yepolymer yenze unxibelelwano oluguquguqukayo phakathi kodaka kunye nethayile kwelinye icala, kwelinye icala, Ipolymer eludongeni yonyusa umxholo womoya wodaka kwaye ichaphazela ukubunjwa kunye nokuthotywa kwepolymer ngexesha lenkqubo yokubeka i-polymer ngokucokisekileyo kwaye inefuthe eliphantsi komhlaba. inkqubo ye-hydration kunye ne-shrinkage yesamente kwi-binder, Zonke ezi zinto ziya kunceda ukuphucula amandla ebhondi.
Ukongeza umgubo we-latex ophinda uhlawulwe kumdaka kunokuphucula kakhulu amandla okudibanisa kunye nezinye izinto, kuba i-hydrophilic latex powder kunye nesigaba solwelo sokumiswa kwesamente singena kwi-pores 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.
Ixesha lokuposa: Feb-20-2023