I-redispersible latex powder iyisisetshenziswa esivamile se-organic gelling, esingaphinde sihlakazwe ngokulinganayo emanzini ukuze senze i-emulsion ngemva kokuxhumana namanzi. Ukwengeza impushana ye-latex ehlakazeka kabusha kungathuthukisa ukusebenza kokugcinwa kwamanzi kodaka lukasimende olusanda kuxutshwa, kanye nokusebenza kwebhondi, ukuguquguquka, ukungakwazi ukungena emanzini kanye nokumelana nokugqwala kodaka lukasimende oluqinile. I-latex powder ishintsha ukuvumelana 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 yifilimu 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 kube nemingcele, 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 yokunamathisela usimende, kodwa inciphise ukuqina kwendawo yokuguqula isixhumi esibonakalayo phakathi kokunamathisela usimende kanye nokuhlanganisa, okuholela ekutheni i-porosity yonke yodaka ingaguquki. 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