I-admixture inomphumela omuhle ekuthuthukiseni ukusebenza kodaka oluxutshwe okomile, futhi i-powder yenjoloba ephindwe kabusha yenziwa nge-emulsion ekhethekile ye-polymer ngemva kokumisa isifutho. Impushana yerabha eyomisiwe iyingxenye yezinhlayiya eziyindilinga ezingama-80~100mm eziqoqwe ndawonye. Lezi zinhlayiya zincibilika emanzini futhi zakha ukuhlakazeka okuzinzile okukhulu kancane kunezinhlayiya ze-emulsion zangempela, ezakha 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. Impuphu yerabha esetshenziswa odakeni ingathuthukisa ukumelana nomthelela, ukuqina, ukumelana nokugqoka, ukwakhiwa kalula, amandla okubopha nokuhlangana, ukumelana nesimo sezulu, ukumelana nokuncibilika kweqhwa, ukuxosha amanzi, amandla okugoba namandla okuguquguquka kodaka. Uma nje izinto ezisekelwe kusimende ezine-latex powder zithintana namanzi, ukusabela kwe-hydration kuzoqala, futhi isisombululo se-calcium hydroxide maduze sizogcwala futhi amakristalu azokwenyuka. Ngesikhathi esifanayo, amakristalu e-ettringite nama-calcium silicate hydrate gels azokwakhiwa. Izinhlayiya eziqinile zifakwe kujeli kanye nezinhlayiya zikasimende ezingenamanzi. Njengoba ukusabela kwe-hydration kuqhubeka, imikhiqizo ye-hydration iyakhula, futhi izinhlayiya ze-polymer kancane kancane ziqoqana emigodini ye-capillary, zenze ungqimba oluminyene olugcwele ebusweni bejeli nasezinhlayiyeni zikasimende ezingenamanzi. Izinhlayiya ze-polymer ezihlanganisiwe kancane kancane zigcwalisa ama-pores.
I-latex powder ehlakazeka kabusha ingathuthukisa amandla okugoba namandla okunamathela odaka ngoba ingakha ifilimu ye-polymer ebusweni bezinhlayiya zodaka. Kukhona ama-pores ebusweni befilimu, futhi ubuso be-pores bugcwele udaka, okunciphisa ukuhlushwa kokucindezeleka. Futhi ngaphansi kwesenzo samandla angaphandle, kuzokhiqiza ukuphumula ngaphandle kokuphuka. Ngaphezu kwalokho, udaka lwakha uhlaka lwamathambo oluqinile ngemva kokuba usimende seniselwe amanzi, kanti i-polymer kuhlaka lwamathambo inomsebenzi welunga elinyakazayo, elifana nezicubu zomzimba womuntu. I-membrane eyakhiwe yi-polymer ingaqhathaniswa namajoyini kanye nemigqa, ukuze kuqinisekiswe ukunwebeka nokuguquguquka kwe-skeleton eqinile. ubulukhuni.
Kuhlelo lwe-polymer-modified Cement mortar, ifilimu ye-polymer eqhubekayo nephelele ihlanganiswe nokunamathisela usimende nezinhlayiya zesihlabathi, okwenza lonke udaka lube luhle futhi lube lukhuni, 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 eshwabene, futhi ithuthukise ukuvala nokuhlangana kwamandla odaka. Ukuba khona kwezizinda ze-polymer eziguquguqukayo kakhulu futhi ezinwebeka kakhulu kuthuthukisa ukuguquguquka nokunwebeka kodaka, kunikeze ukuhlangana nokuziphatha okuguquguqukayo kuhlaka lwamathambo oluqinile. Uma kusetshenziswa amandla angaphandle, inqubo yokusabalalisa i-microcrack ibambezeleka ngenxa yokuguquguquka okuthuthukisiwe nokunwebeka kuze kube yilapho kufinyelelwa ukucindezeleka okuphezulu. Izizinda ze-polymer ezihlanganisiwe ziphinde zisebenze njengesithiyo ekuhlanganeni kwama-microcracks abe yimifantu engena. Ngakho-ke, i-polymer powder ehlakazeka kabusha ithuthukisa ukucindezelwa kokuhluleka kanye nokwehluleka kokusebenza kwezinto.
Isikhathi sokuthumela: Feb-20-2023