Ngabe i-polymer powder ehlakazeka kabusha ikuthinta kanjani ukuguquguquka kodaka?

I-admixture inomphumela omuhle ekuthuthukiseni ukusebenza kokwakha udaka oluxutshwe okomile. I-latex powder e-redispersible yenziwa ngokumiswa kwesifutho se-emulsion ye-polymer ekhethekile. I-polymer powder eyomile iyizinhlayiya eziyindilinga ezingama-80 ~ 100mm eziqoqwe ndawonye. Lezi zinhlayiya zincibilika kalula emanzini, zakha ukuhlakazeka okuzinzile okukhudlwana kunezinhlayiya ze-emulsion zangempela, futhi zakha ifilimu ngemva kokuphelelwa amandla kwamanzi nokomisa.

Izindlela ezihlukene zokuguqula zenza impushana ye-latex ehlakazeka kabusha ibe nezakhiwo ezihlukene njengokumelana namanzi, ukumelana ne-alkali, ukumelana nesimo sezulu kanye nokuguquguquka. I-latex powder ye-redispersible yodaka ingathuthukisa ukumelana nomthelela, ukuqina, ukumelana nokugqoka, ukunethezeka kokwakhiwa, amandla ebhondi nokuhlangana, ukumelana nesimo sezulu, ukumelana nokuqhwa, ukumelana kwamanzi, amandla okuguquguquka kanye nokumelana namandla okugoqa udaka. Uma nje izinto ezisekelwe kusimende eziqukethe i-latex powder zithintana namanzi, ukusabela kwe-hydration kuzoqala, futhi isisombululo se-calcium hydroxide maduze sizogcwala futhi sicwebezele. Ngesikhathi esifanayo, amakristalu e-ettringite kanye nama-gel e-calcium silicate hydrate akhiwa. Izinhlayiya eziqinile zifakwa kujeli kanye nezinhlayiya zikasimende ezingenamanzi. Njengoba ukusabela kwe-hydration kuqhubeka, imikhiqizo ye-hydration iyanda, futhi izinhlayiya ze-polymer zibuthana kancane kancane ezimbotsheni ze-capillary, zakha ungqimba oluminyene lokuqongelela phezu kwejeli kanye nezinhlayiya zikasimende ezingenamanzi. Izinhlayiya ze-polymer ezihlanganisiwe kancane kancane zigcwalisa ama-pores.

Impushana ye-latex ehlakazeka kabusha ingathuthukisa amandla okugoba namandla okubopha odaka ngoba ingakha ifilimu ye-polymer ebusweni bezinhlayiya zodaka. Kukhona ama-pores ebusweni befilimu, futhi ubuso be-pores bugcwele udaka, okunciphisa ukuhlushwa kokucindezeleka. Futhi izophumula ngaphandle kokuphuka ngaphansi kwesenzo samandla angaphandle. Ngaphezu kwalokho, udaka lwakha uhlaka lwamathambo oluqinile ngemva kokuba usimende seniselwe amanzi, kanti i-polymer kuhlaka lwamathambo inomsebenzi wamalunga anyakazayo, afana nezicubu zomzimba womuntu. I-membrane eyenziwe yi-polymer ingafaniswa namalunga nemigqa, ngaleyo ndlela iqinisekise ukunwebeka nokuguquguquka kohlaka lwamathambo oluqinile.

Kuhlelo lwe-polymer-modified Cement mortar, ifilimu ye-polymer eqhubekayo nephelele ihlanganiswa nokunamathisela usimende kanye nezinhlayiya zesihlabathi, okwenza lonke udaka lube ngcono, futhi ngesikhathi esifanayo lwenza yonke inethiwekhi enwebekayo ngokugcwalisa ama-capillaries nama-cavities. Ngakho-ke, ifilimu ye-polymer ingadlulisela ngempumelelo ingcindezi kanye nokuqina kwe-elastic. Ifilimu ye-polymer ingavala imifantu enciphayo kusixhumi esibonakalayo se-polymer-mortar, iphulukise imifantu enciphayo, futhi ithuthukise ukuvala nokubopha amandla odaka. Ukuba khona kwezizinda ze-polymer eziguquguqukayo kakhulu futhi ezinwebeka kakhulu kwandisa ukuguquguquka nokunwebeka kodaka, kunikeze ukuhlangana kanye nezakhiwo eziguqukayo kuhlaka lwamathambo oluqinile. Uma kusetshenziswa amandla angaphandle, inqubo yokukhula kwe-microcrack ibambezeleka kuze kube yilapho kufinyelelwa ukucindezeleka okukhulu ngenxa yokuguquguquka okukhulayo nokunwebeka. Izizinda ze-polymer ezilukiweyo ziphinde zisebenze njengesithiyo sokuthi ama-microcracks ahlangane abe imifantu engena. Ngakho-ke, i-polymer powder ehlakazeka kabusha yandisa ingcindezi yokwehluleka kanye nokwehluleka kokusebenza kwezinto.