Ingxube inomthelela omuhle ekuthuthukiseni ukusebenza kodaka oluxutshwe nowomile. Impuphu ye-latex ephinde ihlakazeke yenziwe nge-polymer emulsion ekhethekile ngemva kokomiswa ngokufuthwa. Impuphu ye-latex eyomisiwe iyizinhlayiya eziyindilinga ezingama-80 ~ 100mm eziqoqwe ndawonye. Lezi zinhlayiya ziyancibilika emanzini futhi zakha ukuhlakazeka okuzinzile okukhulu kancane kunezinhlayiya zokuqala ze-emulsion, ezakha ifilimu ngemva kokuphelelwa amanzi emzimbeni nokomiswa.
Izindlela ezahlukene zokuguqula zenza ukuthi i-latex powder ephinde ihlakazeke ibe nezakhiwo ezahlukene njengokumelana namanzi, ukumelana ne-alkali, ukumelana nesimo sezulu kanye nokuguquguquka. I-latex powder esetshenziswa ku-mortar ingathuthukisa ukumelana nomthelela, ukuqina, ukumelana nokuguguleka, ukulula kokwakhiwa, amandla okubopha kanye nokuhlangana, ukumelana nesimo sezulu, ukumelana nokuqandisa, ukumelana namanzi, amandla okugoba kanye namandla okuguquguquka komortar. Lapho nje izinto ezisekelwe kusimende ezifakwe ne-latex powder zithinta amanzi, ukusabela komswakama kuqala, futhi isisombululo se-calcium hydroxide sifinyelela ngokushesha ekugcwaleni futhi amakristalu ayakhukhuleka, futhi ngesikhathi esifanayo, kwakheka amakristalu e-ettringite kanye namajeli e-calcium silicate hydrate. Izinhlayiya eziqinile zifakwa ku-gel kanye nezinhlayiya ze-cement ezingamanzi. Njengoba ukusabela komswakama kuqhubeka, imikhiqizo yomswakama iyanda, futhi izinhlayiya ze-polymer ziqoqana kancane kancane kuma-capillary pores, zakha ungqimba olugcwele kakhulu ebusweni be-gel kanye nasezinhlayiyeni ze-cement ezingamanzi. Izinhlayiya ze-polymer ezihlanganisiwe zigcwalisa kancane kancane ama-pores.
Impuphu ye-latex ephinde ihlakazeke ingathuthukisa izakhiwo ze-mortar ezifana namandla okugoba kanye namandla okunamathela, ngoba ingakha ifilimu ye-polymer ebusweni bezinhlayiya ze-mortar. Kunezimbobo ebusweni befilimu, futhi ubuso bezimbobo bugcwele i-mortar, okunciphisa ukugxilisa ingqondo. Futhi ngaphansi kwesenzo samandla angaphandle, izokhiqiza ukuphumula ngaphandle kokuphuka. Ngaphezu kwalokho, i-mortar yakha uhlaka oluqinile ngemva kokuba usimende umanzi, kanti i-polymer esesikhwameni inomsebenzi wejoyinti elihambayo, elifana nezicubu zomzimba womuntu. I-membrane eyakhiwe yi-polymer ingafaniswa namalunga nemisipha, ukuze kuqinisekiswe ukuqina nokuguquguquka kohlaka oluqinile.
Kuhlelo lwe-polymer-modryer lukasimende oluguquliwe yi-polymer, ifilimu ye-polymer eqhubekayo nephelele ihlanganiswe ne-cement paste kanye nezinhlayiya zesihlabathi, okwenza lonke udaka lube luncane futhi lube luningi, futhi ngesikhathi esifanayo lwenze lonke lube yinethiwekhi enwebekayo ngokugcwalisa ama-capillary kanye nemigodi. Ngakho-ke, ifilimu ye-polymer ingadlulisela ngempumelelo ingcindezi kanye nokucindezeleka okunwebekayo. Ifilimu ye-polymer ingahlanganisa imifantu yokushwabana esibonakalayo se-polymer-mortar, iphilise imifantu yokushwabana, futhi ithuthukise ukuvala kanye namandla okuhlangana kodaka. Ukuba khona kwezizinda ze-polymer eziguquguqukayo kakhulu futhi ezinwebekayo kakhulu kuthuthukisa ukuguquguquka kanye nokuqina kodaka, kuhlinzeke ngokubumbana kanye nokuziphatha okuguquguqukayo ku-skeleton eqinile. Lapho kusetshenziswa amandla angaphandle, inqubo yokusabalala kwe-microcrack iyabambezeleka ngenxa yokuguquguquka okuthuthukisiwe kanye nokuqina kuze kube yilapho kufinyelelwa ukucindezeleka okuphezulu. Izizinda ze-polymer ezihlanganisiwe nazo zisebenza njengesithiyo ekuhlanganiseni kwama-microcrack emifantwini engena. Ngakho-ke, i-polymer powder ephinde ihlakazeke ithuthukisa ukucindezeleka kokuhluleka kanye nokucindezeleka kokuhluleka kwezinto.
Isikhathi sokuthunyelwe: Mashi-10-2023