I-EPS granular thermal insulation mortar iyinto engasindi yokushisa exutshwe nezibophezelo ze-organic, izihlanganisela, izithasiselo kanye nezilinganiso zokukhanya ngengxenye ethile.Phakathi kwe-EPS i-granular thermal insulation mortars ecwaningiwe futhi yasetshenziswa njengamanje, ingaphinda isetshenziswe kabusha Impushana ye-latex ehlakazekile inethonya elikhulu ekusebenzeni kodaka futhi ithatha ingxenye enkulu ezindlekweni, ngakho-ke kube yinto abantu abagxile kuyo.Ukusebenza okuhlanganisayo kwe-EPS particle insulation mortar yangaphandle yodonga uhlelo ikakhulukazi ivela ku-polymer binder, futhi ukwakheka kwayo ikakhulukazi i-vinyl acetate/ethylene copolymer.Impushana ye-latex ehlakazeka kabusha ingatholakala ngokufafaza ngokumisa lolu hlobo lwe-polymer emulsion.Ngenxa yokulungiswa okunembile, ukuthutha okulula kanye nokugcinwa okulula kwe-latex powder ekwakhiweni, i-latex powder ekhethekile ekhululekile isiphenduke inkambiso yentuthuko ngenxa yokulungiswa kwayo okunembile, ukuhamba okulula nokugcinwa okulula.Ukusebenza kwe-EPS particle insulation mortar kuncike kakhulu ohlotsheni nenani le-polymer esetshenzisiwe.I-Ethylene-vinyl acetate latex powder (EVA) enokuqukethwe okuphezulu kwe-ethylene kanye nenani eliphansi le-Tg (i-glass transition lokushisa) inokusebenza okungcono ngokuya kwamandla womthelela, amandla ebhondi kanye nokumelana namanzi.
Ukulungiswa kwe-latex powder ekusebenzeni kodaka kubangelwa ukuthi i-latex powder iyi-polymer ephezulu yamangqamuzana namaqembu e-polar.Uma i-latex powder ixutshwa nezinhlayiya ze-EPS, ingxenye engeyona i-polar ochungechungeni oluyinhloko lwe-latex powder polymer izokwenza Ukukhangisa ngokomzimba kuzokwenzeka nge-non-polar surface ye-EPS.Amaqembu e-polar ku-polymer aqondiswe ngaphandle ebusweni bezinhlayiya ze-EPS, ukuze izinhlayiya ze-EPS zishintshe ukusuka ku-hydrophobicity kuya ku-hydrophilicity.Ngenxa yokuguqulwa kobuso bezinhlayiya ze-EPS nge-latex powder, ixazulula inkinga yokuthi izinhlayiya ze-EPS zivezwa kalula emanzini.Ukuntanta, inkinga yokwendlaleka okukhulu kodaka.Ngalesi sikhathi, lapho usimende wengezwa futhi uxutshwe, amaqembu e-polar adsorbed ebusweni bezinhlayiya ze-EPS asebenzisana nezinhlayiya ze-cement futhi ahlangane eduze, ukuze ukusebenza kwe-EPS insulation mortar kuthuthukiswe kakhulu.Lokhu kubonakala eqinisweni lokuthi izinhlayiya ze-EPS zimanziswa kalula ngokunamathisela usimende, futhi amandla okubopha phakathi kokubili athuthukiswa kakhulu.
I-Emulsion kanye ne-latex powder ehlakazeka kabusha ingakha amandla aphezulu okuqina namandla okubopha ezintweni ezahlukahlukene ngemuva kokwakhiwa kwefilimu, asetshenziswa njengesibophezelo sesibili odakeni ukuze kuhlanganiswe nosimende we-inorganic binder, usimende kanye ne-polymer ngokulandelana. ukusebenza kodaka.Ngokubheka ukwakheka kwe-microstructure ye-polymer-cement composite material, kunenkolelo yokuthi ukungezwa kwe-latex powder ehlakazekayo kungenza i-polymer ibe ifilimu futhi ibe yingxenye yodonga lwembobo, futhi yenze udaka lwakhiwe lonke ngokusebenzisa amandla angaphakathi, okuthuthukisa amandla angaphakathi odaka.Amandla e-polymer, ngaleyo ndlela athuthukise ingcindezi yokwehluleka kodaka futhi akhulise ubunzima bokugcina.Ukutadisha ukusebenza kwesikhathi eside kwe-latex powder e-redispersible odakeni, kwabonwa yi-SEM ukuthi ngemva kweminyaka engu-10, i-microstructure ye-polymer odakeni ayizange ishintshe, igcina ukubopha okuzinzile, amandla aguquguqukayo nokucindezela kanye nokuxoshwa kwamanzi okuhle.Indlela yokwakheka yamandla okunamathela kuthayela yacwaningwa ngempushana ye-latex ehlakazeka kabusha, futhi kwatholakala ukuthi ngemva kokuba i-polymer isomisiwe ibe ifilimu, ifilimu ye-polymer yakha uxhumano oluguquguqukayo phakathi kodaka kanye nethayili ngakolunye uhlangothi, nangaphezulu. ngakolunye uhlangothi, I-polymer odakeni inyusa okuqukethwe komoya odakeni futhi ithinte ukwakheka kanye nokumanzisa kwendawo, futhi kamuva phakathi nenqubo yokubeka i-polymer iphinde ibe nomthelela omuhle enqubweni yokufakwa kwamanzi kanye nokushwabana kukasimende endaweni. isibopho, Konke lokhu kuzosiza ukuthuthukisa amandla esibopho.
Ukwengeza impushana ye-latex ehlakazeka kabusha odakeni kungathuthukisa kakhulu amandla okubopha nezinye izinto, ngoba i-hydrophilic latex powder kanye nesigaba esiwuketshezi sokumiswa kukasimende singena ezimbotsheni nasemacapillari e-matrix, futhi i-latex powder ingena ezimbotsheni nasemacapillari. .Ifilimu yangaphakathi iyakhiwa futhi ikhangiswe ngokuqinile ebusweni be-substrate, ngaleyo ndlela iqinisekise amandla esibopho esihle phakathi kwezinto zikasimende ne-substrate.
Isikhathi sokuthumela: Feb-20-2023