Ngaba i-polymer powder ehlanjululwayo ichaphazela njani ukuguquguquka kodaka?

I-admixture inefuthe elihle ekuphuculeni ukusebenza kwesakhiwo sodaka oluxubileyo. I-latex powder ephinda ikwazi ukuchithwa yenziwa ngokutshiza ukomiswa kwe-emulsion ekhethekileyo ye-polymer. Umgubo wepolymer owomileyo ngamasuntswana angama-80 ~ 100mm angqukuva aqokelelwe ndawonye. La masuntswana anyibilika ngokulula emanzini, enza i-dispersion ezinzileyo inkulu kancinci kuneengqayi ze-emulsion yasekuqaleni, kwaye yenze ifilimu emva kokuphelelwa ngamanzi emzimbeni kunye nokomisa.

Amanyathelo okuguqula ahlukeneyo enza ukuba i-latex powder ephindwe kwakhona ibe neepropati ezahlukeneyo ezifana nokuxhathisa kwamanzi, ukuxhathisa kwe-alkali, ukumelana nemozulu kunye nokuguquguquka. I-redispersible latex powder yodaka inokuphucula ukuxhathisa impembelelo, ukuqina, ukuxhathisa ukunxiba, ukulungelelaniswa kolwakhiwo, amandla ebhondi kunye nokubambisana, ukumelana nemozulu, ukumelana nokuqhaqhazela, ukuxhathisa kwamanzi, amandla okuguquguquka kunye nokuxhathisa amandla okusonga udaka. Ngethuba nje i-cement-based based material equkethe i-latex powder idibene namanzi, i-hydration reaction iya kuqala, kwaye isisombululo se-calcium hydroxide siya kuhluthwa ngokukhawuleza kwaye sidibanise. Ngaxeshanye, iikristale ze-ettringite kunye ne-calcium silicate hydrate gels zenziwa. Iinqununu eziqinileyo zifakwe kwi-gel kunye neengqungquthela ze-samente ezingenamanzi. Njengoko i-hydration reaction iqhubeka, iimveliso ze-hydration zanda, kwaye iinqununu ze-polymer ziqokelela ngokuthe ngcembe kwi-capillary pores, zenza i-dense accumulation layer kwi-gel surface kunye neengqungquthela ze-samente ezingenamanzi. Amasuntswana e-polymer ahlanganisiweyo ngokuthe ngcembe azalise i-pores.

I-latex powder ephinda ikwazi ukuphucula amandla okugoba kunye namandla okubopha udaka ngenxa yokuba inokwenza ifilimu ye-polymer kumphezulu wamasuntswana odaka. Kukho ama-pores ebusweni befilimu, kwaye umphezulu we-pores uzaliswe ngodaka, okunciphisa uxinzelelo loxinzelelo. Kwaye iya kuphumla ngaphandle kokuphuka phantsi kwesenzo samandla angaphandle. Ukongeza, udaka lwenza i-skeleton eqinile emva kokuba i-samente ifakwe emanzini, kwaye i-polymer kwi-skeleton inomsebenzi wamalungu ahambayo, afana nezicubu zomzimba womntu. I-membrane eyenziwe yi-polymer inokufaniswa namalungu kunye nemigqa, ngaloo ndlela iqinisekisa ukuqina kunye nokuguquguquka kwe-skeleton eqinile.

Kwi-polymer-modified cement mortar system, ifilimu ye-polymer eqhubekayo kwaye epheleleyo idibeneyo kunye ne-samente ye-samente kunye neengqungquthela zesanti, okwenza udaka lonke lube lukhuni, kwaye ngexesha elifanayo lenze yonke inethiwekhi ye-elastic ngokuzalisa ii-capillaries kunye ne-cavities. Ke ngoko, ifilimu yepolymer inokuhambisa ngokufanelekileyo uxinzelelo kunye noxinzelelo lwe-elastic. Ifilimu ye-polymer ingakwazi ukuvala iintanda ze-shrinkage kwi-polymer-mortar interface, iphilise iintanda ze-shrinkage, kwaye iphucule ukutywinwa kunye namandla okubopha udaka. Ubukho beendawo eziguquguqukayo kakhulu kunye ne-elastic polymer domains kwandisa ukuguquguquka kunye nokuqina kodaka, ukubonelela ngokuhambelana kunye neempawu eziguqukayo kwi-skeleton eqinile. Xa kusetyenziswe amandla angaphandle, inkqubo yokukhula kwe-microcrack ilibazisekile de kufike uxinzelelo oluphezulu ngenxa yokunyuka kokuguquguquka kunye nokuqina. Imimandla ye-polymer edibeneyo iphinda isebenze njengesithintelo se-microcracks ukudibanisa kwiintanda ezigqobhozayo. Ke ngoko, i-polymer powder ephinda ihlaziywe yonyusa uxinzelelo lokungaphumeleli kunye nokungaphumeleli koxinzelelo lwezinto.