I-redispersible latex powder iyisisetshenziswa esisetshenziswa kakhulu se-organic gelling, esingaphinde sihlakazwe ngokulinganayo emanzini ukuze senze i-emulsion ngemva kokuxhumana namanzi.Ukwengeza i-latex powder ehlakazeka kabusha kungathuthukisa ukusebenza kokugcinwa kwamanzi kodaka lukasimende olusanda kuxutshwa, kanye nokusebenza kokubopha, ukuguquguquka, ukungakwazi ukubola kanye nokumelana nokugqwala kodaka lukasimende oluqinile.I-latex powder ishintsha ukuhambisana nokushelela kwesistimu esimweni esimanzi sokuxuba, futhi ukuhlangana kuthuthukiswa ngokungeza i-latex powder.Ngemuva kokumisa, inikeza ungqimba lwangaphezulu olubushelelezi nominyene ngamandla ahlangene, futhi ithuthukisa umphumela wokusebenzisana kwesihlabathi, amatshe kanye nama-pores., ethuthukisiwe ibe ifilimu esibonakalayo, okwenza izinto eziguquguqukayo ziguquguquke, kunciphisa i-elastic modulus, idonsa ukucindezeleka kokushintsha okushisayo ngezinga elikhulu, futhi inokumelana namanzi esigabeni sakamuva, futhi izinga lokushisa le-buffer kanye nokuguqulwa kwezinto ezibonakalayo akuhambisani.
Ukwakhiwa kwefilimu ye-polymer eqhubekayo kubaluleke kakhulu ekusebenzeni kwezisimende ze-polymer-modified Cement.Ngesikhathi sokusetha nokuqinisa inqubo yokunamathisela usimende, kuzokwenziwa izimbotshana eziningi ngaphakathi, eziba izingxenye ezibuthakathaka zokunamathisela usimende.Ngemuva kokuthi i-latex powder ye-redispersible yengezwe, i-latex powder izohlakazeka ngokushesha ibe i-emulsion lapho ihlangana namanzi, futhi iqoqe endaweni enamanzi amaningi (okungukuthi, emgodini).Njengoba unamathisela usimende setha futhi uqina, ukunyakaza kwezinhlayiya ze-polymer kuya ngokuya kuvinjelwa, futhi ukungezwani kobuso phakathi kwamanzi nomoya kuyawaphoqa ukuthi aqondane kancane kancane.Lapho izinhlayiya ze-polymer zihlangana nomunye nomunye, inethiwekhi yamanzi iyahwamuka ngokusebenzisa ama-capillaries, futhi i-polymer yakha ifilimu eqhubekayo ezungeze umgodi, iqinisa lezi zindawo ezibuthakathaka.Ngalesi sikhathi, ifilimu ye-polymer ayikwazi ukudlala indima ye-hydrophobic kuphela, kodwa futhi ingavimbeli i-capillary, ukuze impahla ibe ne-hydrophobicity enhle kanye nokuphefumula komoya.
Udaka lukasimende olungenayo i-polymer luxhunywe ngokukhululekile ndawonye.Ngokuphambene nalokho, udaka lukasimende oluguquliwe lwe-polymer lwenza lonke udaka luxhunywe ngokuqinile ngenxa yokuba khona kwefilimu ye-polymer, ngaleyo ndlela ithola izakhiwo ezingcono zemishini kanye nobulili bokumelana nesimo sezulu.Odakeni lukasimende oluguquliwe lwe-latex powder, impushana ye-latex izokhuphula i-porosity yesigxobo sikasimende, kodwa inciphise ukuqina kwendawo yokuguqula isixhumi esibonakalayo phakathi kokunamathisela usimende kanye nokuhlanganisa, okuholela ekutheni i-porosity iyonke yodaka ngokuyisisekelo ingashintshile.Ngemuva kokuthi i-latex powder yenziwe ifilimu, ingavimba kangcono ama-pores odakeni, okwenza ukwakheka kwendawo yokuguqula isikhombimsebenzisi phakathi kokunamathisela usimende kanye ne-aggregate kuminyene kakhulu, futhi ukumelana nokuqina kwe-latex powder modified mortar kuyathuthukiswa. , kanye nekhono lokumelana nokuguguleka kwemithombo yezindaba eyingozi liyathuthukiswa.Kunomthelela omuhle ekwenzeni ngcono ukuqina kodaka.
Isikhathi sokuthumela: Mar-14-2023