I-latex powder e-redispersible ingathuthukisa izakhiwo zodaka njengamandla aguquguqukayo namandla okunamathela, ngoba ingenza 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 futhi ephelele ihlanganiswa 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 enciphayo, 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 kufinyelelwe 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.
Ukwengeza i-latex powder odakeni lukasimende kuzokwakha ifilimu yenethiwekhi ye-polymer eguquguqukayo kakhulu futhi enwebekayo, ezokwenza ngcono kakhulu ukusebenza kodaka, ikakhulukazi amandla okuqina odaka azothuthukiswa kakhulu.Uma kusetshenziswa amandla angaphandle, ngenxa yokuthuthukiswa kokuhlangana okuphelele kodaka kanye nokunwebeka okuthambile kwe-polymer, ukuvela kwama-micro-cracks kuzosuswa noma kuncishiswe.Ngethonya lokuqukethwe kwe-latexr powder emandleni e-thermal insulation mortar, kutholakala ukuthi amandla esibopho esiqinile se-thermal insulation mortar anda ngokunyuka kokuqukethwe kwe-latex powder;amandla okuguquguquka namandla okucindezela anezinga elithile ngokunyuka kokuqukethwe kwe-latex powder.Izinga lokwehla, kodwa lihlangabezana nezimfuneko zokuqedwa kodonga lwangaphandle.
Udaka lukasimende oluxutshwe nempushana ye-latex, amandla ayo okubopha angu-28d ayanda ngokwanda kokuqukethwe kwe-latex powder.Ngokukhula kokuqukethwe kwempushana ye-latex, ikhono lokubopha likasimende nodaka lukasimende oludala luyathuthukiswa, okuqinisekisa izinzuzo zalo zokulungisa umgwaqo ogandayiwe usimende nezinye izakhiwo.Ngaphezu kwalokho, isilinganiso sokugoqa sodaka siyakhula ngokwanda kokuqukethwe kwe-latex powder, futhi ukuguquguquka kodaka olungaphezulu kuyathuthuka.Ngesikhathi esifanayo, kuphinde kwatholakala ukuthi ngokwanda kokuqukethwe kwe-latex powder, i-modulus elastic of mortar yehla kuqala bese yanda.Sekukonke, ngokwanda kwesilinganiso sokuqoqwa komlotha, i-elastic modulus kanye ne-deformation modulus yodaka iphansi kunaleyo yodaka olujwayelekile.
Isikhathi sokuthumela: Mar-14-2023