I-EPS granular thermal insulation mortar iyinto yokushisa elula exutshwe ne-inorganic binder, i-organic binder, i-admixture, i-admixture kanye ne-light aggregate ngesilinganiso esithile. Ocwaningweni lwamanje kanye nokusetshenziswa kwe-EPS particle insulation mortar, i-latex powder ephinde isetshenziswe kabusha inethonya elikhulu ekusebenzeni kwe-mortar futhi ithatha isilinganiso esiphezulu sezindleko, ngakho-ke ibilokhu igxile kakhulu. Ukusebenza kokubopha kwe-EPS particle thermal insulation mortar yangaphandle yodonga ikakhulukazi kuvela ku-polymer binder, futhi ingxenye yayo ikakhulukazi i-vinyl acetate/ethylene copolymer. Lolu hlobo lwe-polymer emulsion lungashiswa nge-spray ukuze kutholakale i-latex powder ephinde isetshenziswe kabusha. Ngenxa yokulungiswa okunembile kwe-latex powder ephinde isetshenziswe kabusha ekwakhiweni, ekuthuthweni okulula kanye nasekugcinweni okulula, i-free powder yama-polymers isibe yindlela yokuthuthuka ngenxa yokulungiswa kwayo okunembile, ukuthuthwa okulula kanye nokugcinwa okulula. Ukusebenza kwe-EPS particle insulation mortar kuncike kakhulu ohlotsheni kanye nenani le-polymer esetshenzisiwe. I-Ethylene-vinyl acetate latex powder (EVA) enokuqukethwe okuphezulu kwe-ethylene kanye nenani eliphansi le-Tg (izinga lokushisa lokushintsha kwengilazi) inezakhiwo ezingcono maqondana namandla okushayisana, amandla okubopha kanye nokumelana namanzi.
Ukwenziwa ngcono kokusebenza kwempuphu ye-latex ephinde ihlakazeke ku-mortar kungenxa yokuthi i-polymer powder iyi-polymer ephezulu yama-molecule enamaqembu e-polar. Uma i-RDP ixutshwa nezinhlayiya ze-EPS, ingxenye engeyona i-polar eketangeni eliyinhloko lempuphu ye-polymer izonamathela ngokomzimba ebusweni obungeyona i-polar be-EPS. Amaqembu e-polar ku-polymer aqondiswe ngaphandle ebusweni bezinhlayiya ze-EPS, okwenza izinhlayiya ze-EPS zishintshe kusukela ekubeni yi-hydrophobic ziye ekubeni yi-hydrophilic. Ngenxa yokuguqulwa kobuso bezinhlayiya ze-EPS yimpuphu ye-polymer, inkinga yokuthi izinhlayiya ze-EPS kulula ukuhlangana nazo amanzi iyaxazululwa. Izinkinga ezinkulu zokuntanta, zokuhlukanisa u-mortar. Ngalesi sikhathi, lapho kungezwa usimende futhi kuxutshwa, amaqembu e-polar anamathele ebusweni bezinhlayiya ze-EPS asebenzisana nezinhlayiya ze-cement futhi ahlangana eduze, okuthuthukisa kakhulu ukusebenza kahle komotha wokushisa we-EPS. Lokhu kubonakala eqinisweni lokuthi izinhlayiya ze-EPS zimanziswa kalula yi-slurry yesimende, futhi amandla okubopha phakathi kwalezi zibili athuthukiswa kakhulu.
Ngemva kokuba i-emulsion kanye ne-latex powder ephinde ihlakazeke kwakhiwa ibe ifilimu, zingakha amandla aphezulu okuthamba kanye namandla okubopha ezintweni ezahlukene. Zisetshenziswa njenge-binder yesibili ku-mortar ukuze zihlanganiswe ne-inorganic binder cement, i-cement kanye ne-polymer ngokulandelana. Dlala amandla ahambisanayo futhi uthuthukise ukusebenza kwe-mortar. Ngokubheka isakhiwo esincane sezinto ezihlanganisiwe ze-polymer-cement, kubhekwa ukuthi ukungezwa kwe-latex powder ephinde ihlakazeke kungenza ifilimu ye-polymer yakhe ingxenye yodonga lwembobo, futhi kwenze i-mortar ibe yiyo yonke ngamandla angaphakathi, okuthuthukisa amandla angaphakathi e-mortar. Amandla e-polymer, ngaleyo ndlela kwandisa ukucindezeleka kokuhluleka kwe-mortar futhi kwandise ukucindezeleka kokugcina. Ukuze kufundwe ukusebenza kwesikhathi eside kwe-latex powder ephinde ihlakazeke ku-mortar, okubonwe nge-scanning electron microscope, ngemuva kweminyaka eyi-10, isakhiwo se-polymer ku-mortar asikashintshi, sigcina i-bonding ezinzile, amandla okuguquguquka kanye namandla okucindezela kanye ne-Hydrophobic enhle. Ngokusebenzisa i-latex powder ephinde ihlakazeke njengento yocwaningo, kwafundwa indlela yokwakheka kwamandla okubopha amathayili, kwatholakala ukuthi ngemva kokuba i-polymer yomisiwe ibe ifilimu, ifilimu ye-polymer yakha uxhumano oluguquguqukayo phakathi kwe-mortar ne-tile ngakolunye uhlangothi, kanti ngakolunye uhlangothi, Ama-polymer ase-mortar andisa okuqukethwe komoya we-mortar, okuthinta ukuthamba kanye nokumanzika kobuso, futhi kamuva ngesikhathi senqubo yokusetha, ama-polymer nawo anethonya elihle enqubweni yokumanzisa kanye nokuncishiswa kwe-samente. Ama-adhesive, wonke lawa asiza ukwandisa amandla okubopha.
Ukwengeza i-latex powder ephinde ihlakazeke ku-mortar kungathuthukisa kakhulu amandla okubopha nezinye izinto, ngoba isigaba soketshezi se-hydrophilic polymer powder kanye ne-cement suspension singena kuma-pores nama-capillary e-matrix, kuyilapho i-latex powder ingena kuma-pores nase-capillary. Ifilimu yangaphakathi iyakhiwa futhi inamathele ngokuqinile ebusweni be-substrate, ngaleyo ndlela iqinisekise amandla amahle okubopha phakathi kwezinto ezifakwe i-gel kanye ne-substrate.
Isikhathi sokuthunyelwe: Juni-16-2023