I-EPS granular thermal insulation mortar sisixhobo sokukhusela ubushushu esikhaphukhaphu esixutywe nezihlanganisi ezingaphiliyo, izihlanganisi zezinto eziphilayo, izihlanganisi, izongezo kunye nee-aggregates ezikhanyayo ngokwemilinganiselo ethile. Phakathi kwezihlanganisi ze-EPS granular thermal insulation mortars eziphandwayo nezisetyenziswayo ngoku, zinokuphinda zisetyenziswe. I-Dispersed latex powder inempembelelo enkulu ekusebenzeni kwe-mortar kwaye ithatha inqanaba eliphezulu kwixabiso, ngoko ke ibe yinto ephambili kubantu. Ukusebenza kwe-bonding kwenkqubo ye-EPS particle insulation mortar yangaphandle kuvela ikakhulu kwi-polymer binder, kwaye ukwakheka kwayo ikakhulu yi-vinyl acetate/ethylene copolymer. I-Redispersible latex powder inokufumaneka ngokutshiza olu hlobo lwe-polymer emulsion. Ngenxa yokulungiswa ngokuchanekileyo, ukuthuthwa okulula kunye nokugcinwa okulula kwe-redispersible latex powder ekwakheni, i-special loose latex powder iye yaba yindlela yophuhliso ngenxa yokulungiswa kwayo ngokuchanekileyo, ukuthuthwa 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) isebenza ngcono ngokubhekiselele kumandla okuchaphazeleka, amandla okubopha kunye nokumelana namanzi.
Ukwenziwa ngcono komgubo we-latex ekusebenzeni komdaka kungenxa yokuba umgubo we-latex yi-polymer ephezulu yeemolekyuli enamaqela e-polar. Xa umgubo we-latex uxutywe namaqhekeza e-EPS, icandelo elingeyo-polar kwikhonkco eliphambili le-polymer yomgubo we-latex liya kwenzeka. Ukutsalwa ngokwasemzimbeni kuya kwenzeka nomphezulu ongeyo-polar we-EPS. Amaqela e-polar kwi-polymer ajongiswe ngaphandle kumphezulu wamaqhekeza e-EPS, ukuze amaqhekeza e-EPS atshintshe ukusuka kwi-hydrophobicity ukuya kwi-hydrophilicity. Ngenxa yokuguqulwa komphezulu wamaqhekeza e-EPS ngumgubo we-latex, isombulula ingxaki yokuba amaqhekeza e-EPS abonakala lula emanzini. Ukudada, ingxaki yokufakwa kwesamente enkulu. Ngeli xesha, xa isamente yongezwa kwaye ixutywe, amaqela e-polar afakwe kumphezulu wamaqhekeza e-EPS asebenzisana namaqhekeza esamente kwaye adibana ngokusondeleyo, ukuze ukusebenza komdaka we-insulation we-EPS kuphuculwe kakhulu. Oku kubonakala kwinto yokuba amaqhekeza e-EPS axutywa lula yi-cement paste, kwaye amandla okubopha phakathi kwezi zimbini aphucuke kakhulu.
Umgubo we-Emulsion kunye nomgubo we-latex ophinda uqhekeke unokwenza amandla aphezulu okuxinana kunye namandla okubopha kwizinto ezahlukeneyo emva kokwenziwa kwefilimu, zisetyenziswa njenge-binder yesibini kwi-mortar ukuze zihlanganiswe ne-inorganic binder cement, isamente kunye ne-polymer ngokulandelanayo. Zinika amandla afanelekileyo ukuphucula ukusebenza kwe-mortar. Ngokujonga ulwakhiwo lwe-microstructure yezinto ezidityanisiweyo ze-polymer-cement, kukholelwa ukuba ukongezwa komgubo we-latex ophinda uqhekeke kunokwenza i-polymer ibe yifilimu kwaye 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 kuphucula uxinzelelo lokusilela kwe-mortar kwaye kwandisa uxinzelelo lokugqibela. Ukuze kufundwe ukusebenza kwexesha elide kwe-latex powder ephinda iqhekeke kwi-mortar, kwabonwa yi-SEM ukuba emva kweminyaka eli-10, ulwakhiwo lwe-microstructure ye-polymer kwi-mortar alutshintshanga, lugcina ulwalamano oluzinzileyo, amandla okuguquguquka kunye nokucinezelwa kunye nokuchasana kwamanzi okuhle. Indlela yokwenza amandla okuncamathelisa iithayile ifundwe kwipowder yelatex ephinda inyibilike, kwaye kwafunyaniswa ukuba emva kokuba ipolymer yomisiwe ibe yifilimu, ifilimu yepolymer yenze unxibelelwano oluguquguqukayo phakathi kwemortar kunye nethayile kwelinye icala, kwaye kwelinye icala, ipolymer ekwimortar inyusa umxholo womoya wemortar kwaye ichaphazela ukwakheka kunye nokumanzi komphezulu, kwaye emva koko ngexesha lenkqubo yokuseta ipolymer ikwanempembelelo entle kwinkqubo yokufunxa amanzi kunye nokuncitshiswa kwesamente kwi-binder, Zonke ezi zinto ziya kunceda ukuphucula amandla ebhondi.
Ukongeza umgubo we-latex ophinda uqhekeke kwi-mortar kunokuphucula kakhulu amandla okubopha nezinye izinto, kuba umgubo we-latex ophilic hydrophilic kunye ne-liquid phase ye-samente suspension zingena kwii-pores kunye nee-capillaries ze-matrix, kwaye umgubo we-latex ungena kwii-pores kunye nee-capillaries. Ifilimu yangaphakathi yenziwe kwaye inamathele ngokuqinileyo kumphezulu we-substrate, ngaloo ndlela iqinisekisa amandla amahle okubopha phakathi kwezinto ezisimende kunye ne-substrate.
Ixesha lokuthumela: Februwari-20-2023