I-EPS granular thermal insulation mortar sisixhobo sokukhusela ubushushu esikhaphukhaphu esixutywe ne-inorganic binder, i-organic binder, i-admixture, i-admixture kunye ne-light aggregate kwinxalenye ethile. Kuphando lwangoku kunye nokusetyenziswa kwe-EPS particle insulation mortar, i-latex powder ephinda isetyenziswe inempembelelo enkulu ekusebenzeni kwe-mortar kwaye ithatha umlinganiselo ophezulu kwixabiso, ngoko ke ibisoloko igxininiswa ingqalelo. Ukusebenza kwe-bonding ye-EPS particle thermal insulation mortar yangaphandle yodonga ikakhulu kuvela kwi-polymer binder, kwaye icandelo layo ikakhulu yi-vinyl acetate/ethylene copolymer. Olu hlobo lwe-polymer emulsion lunokomiswa nge-spray ukuze kufumaneke i-latex powder ephinda isetyenziswe. Ngenxa yokulungiswa ngokuchanekileyo kwe-latex powder ephinda isetyenziswe ekwakheni, ukuthutha okulula kunye nokugcinwa okulula, i-loose powder yee-polymers ibe yindlela yophuhliso ngenxa yokulungiswa kwayo ngokuchanekileyo, ukuthutha okulula kunye nokugcinwa okulula. Ukusebenza kwe-EPS particle insulation mortar kuxhomekeke kakhulu kuhlobo kunye nobungakanani be-polymer esetyenzisiweyo. I-Ethylene-vinyl acetate latex powder (EVA) enomxholo ophezulu we-ethylene kunye nexabiso eliphantsi le-Tg (ubushushu bokutshintsha kweglasi) ineempawu ezingcono ngokubhekiselele kumandla okuchaphazeleka, amandla okubopha kunye nokumelana namanzi.
Ukwenziwa ngcono kokusebenza komgubo we-latex ophinda udibane kwi-mortar kungenxa yokuba umgubo we-polymer yi-polymer ephezulu ye-molecular enamaqela e-polar. Xa i-RDP ixutywe namaqhekeza e-EPS, icandelo elingeyo-polar kwikhonkco eliphambili lomgubo we-polymer liya kunamathela ngokwasemzimbeni kumphezulu ongeyo-polar we-EPS. Amaqela e-polar kwi-polymer ajongiswe ngaphandle kumphezulu wamaqhekeza e-EPS, okwenza amaqhekeza e-EPS atshintshe ukusuka ekubeni yi-hydrophobic ukuya kwi-hydrophilic. Ngenxa yokuguqulwa komphezulu wamaqhekeza e-EPS ngumgubo we-polymer, ingxaki yokuba amaqhekeza e-EPS kulula ukuwadibana namanzi iyasombululwa. Iingxaki ezinkulu zokuqhekeka kwe-mortar. Ngeli xesha, xa wongeza isamente kwaye uxuba, amaqela e-polar anamathele kumphezulu wamaqhekeza e-EPS asebenzisana namaqhekeza esamente kwaye adibana ngokusondeleyo, nto leyo ephucula kakhulu ukusebenza kwe-mortar yokugquma ye-EPS. Oku kubonakala kwinto yokuba amaqhekeza e-EPS alula ukumanziswa yi-slurry yesamente, kwaye amandla okubopha phakathi kwezi zimbini aphucuka kakhulu.
Emva kokuba i-emulsion kunye ne-redispersible latex powder zenziwe ifilimu, zinokwenza amandla aphezulu okuxinana kunye namandla okubopha kwizinto ezahlukeneyo. Zisetyenziswa njengesibopheleli sesibini kwi-mortar ukuze zidibene ne-inorganic binder cement, isamente kunye ne-polymer ngokulandelelana. Dlala amandla afanelekileyo kwaye uphucule ukusebenza kwe-mortar. Ngokujonga ulwakhiwo lwe-microstructure yezinto ezidityanisiweyo ze-polymer-cement, kucingelwa ukuba ukongezwa kwe-redispersible latex powder kungenza ifilimu ye-polymer ibe yinxalenye yodonga lomngxuma, kwaye kwenze i-mortar ibe yiyo yonke ngamandla angaphakathi, nto leyo ephucula amandla angaphakathi e-mortar. Amandla e-polymer, ngaloo ndlela kwandisa uxinzelelo lokusilela kwe-mortar kwaye kwandise uxinzelelo lokugqibela. Ukufunda ukusebenza kwexesha elide kwe-redispersible latex powder kwi-mortar, ebonwe yi-scanning electron microscope, emva kweminyaka eli-10, ulwakhiwo lwe-microstructure ye-polymer kwi-mortar alutshintshanga, lugcina i-bonding ezinzileyo, amandla e-flexural kunye namandla okucinezela kunye ne-Hydrophobic elungileyo. Xa kuthathwa umgubo welatex ophinda uqhekeke njengenjongo yophando, indlela yokwakheka kwamandla okubopha iithayile yafundwa, kwaye kwafunyaniswa ukuba emva kokuba ipolymer yomisiwe ibe yifilimu, ifilimu yepolymer yakha unxibelelwano oluguquguqukayo phakathi komongo kunye nethayile kwelinye icala, kwaye kwelinye icala, iipolymers ezikwimongo zonyusa umxholo womoya wemongo, zichaphazela ukuba tyaba kunye nokufuma komphezulu, kwaye emva koko ngexesha lenkqubo yokuseta, iipolymers nazo zinefuthe elihle kwinkqubo yokufunxa amanzi kunye nokuncitshiswa kwesamente. Izincamathelisi, zonke ezi zinceda ukonyusa amandla okubopha.
Ukongeza umgubo we-latex ophinda udibane kwi-mortar kunokuphucula kakhulu amandla okubopha nezinye izinto, kuba isigaba solwelo somgubo we-polymer ophilic kunye ne-samente suspension singena kwii-pores kunye nee-capillaries ze-matrix, ngelixa umgubo we-latex ungena kwii-pores nakwi-capillary. Ifilimu yangaphakathi yenziwe kwaye inamathele ngokuqinileyo kumphezulu we-substrate, ngaloo ndlela iqinisekisa amandla amahle okubopha phakathi kwezinto ezifakwe i-gel kunye ne-substrate.
Ixesha lokuthumela: Juni-16-2023