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 latexr powder (EVA) enokuqukethwe okuphezulu kwe-ethylene kanye nenani eliphansi le-Tg (i-glass transition lokushisa) linokusebenza okungcono kakhulu mayelana namandla omthelela, 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 okuqinile namandla okubopha ezintweni ezihlukene ngemuva kokwakhiwa kwefilimu, asetshenziswa njengesibophezelo sesibili odakeni ukuze kuhlanganiswe nosimende we-inorganic binder, usimende kanye ne-polymer ngokulandelana Nikeza ukudlala okugcwele emandleni ahambisanayo ukuze uthuthukise ukusebenza kodaka. Ngokubheka ukwakheka kwe-microstructure ye-polymer-cement composite material, kukholelwa ukuthi 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 yomiswa ibe ifilimu, ifilimu ye-polymer yakha uxhumano oluguquguqukayo phakathi kodaka kanye nethayela ngakolunye uhlangothi, futhi ngakolunye uhlangothi, I-polymer odakeni inyusa okuqukethwe komoya osikeni futhi ithinta ukwakheka kanye nokumanzisa kwe-polymer endaweni futhi inethonya eliphansi le-polymer ngesikhathi sokumiswa kwe-polymer. inqubo ye-hydration kanye nokuncipha kukasimende ku-binder, Konke lokhu kuzosiza ukuthuthukisa amandla esibopho.
Ukwengeza impushana ye-latex ehlakazeka kabusha odakeni kungathuthukisa ngokuphawulekayo amandla okubopha nezinye izinto, ngoba i-hydrophilic latex powder kanye nesigaba esiwuketshezi sokumiswa kukasimende singena ezimbotsheni nama-capillaries e-matrix, futhi i-latex powder ingena ezimbotsheni nama-capillaries. Ifilimu yangaphakathi iyakhiwa futhi ikhangiswe ngokuqinile ebusweni be-substrate, ngaleyo ndlela iqinisekise amandla esibopho esihle phakathi kwezinto zikasimende ne-substrate.
Isikhathi sokuthumela: Mar-09-2023