I-admixture inefuthe elihle ekuphuculeni ukusebenza kodaka oluxutyiweyo olulomileyo, kwaye i-rubber powder ephindwe kabini yenziwe nge-emulsion ekhethekileyo ye-polymer emva kokumisa isitshizi.Umgubo werabha omisiweyo ngamasuntswana angqukuva angama-80 ~ 100mm aqokelelwe ndawonye.Ezi ngqungquthela zinyibilika emanzini kwaye zenze i-dispersion ezinzileyo inkulu kancinane kuneengqungquthela ze-emulsion zangaphambili, ezenza ifilimu emva kokuphelelwa ngamanzi 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.Umgubo werabha osetyenziswe kudaka unokuphucula ukuxhathisa impembelelo, ukuqina, ukuxhathisa ukunxiba, ukukhululeka kokwakhiwa, amandla okubopha kunye nokubambisana, ukumelana nemozulu, ukuchasana nomkhenkce, ukugxotha amanzi, amandla okugoba kunye namandla okuguquguquka kodaka.Ngethuba nje i-cement-based based material with latex powder idibene namanzi, i-hydration reaction iya kuqala, kwaye isisombululo se-calcium hydroxide siya kuhluthwa ngokukhawuleza kwaye i-crystals iya kunqanyulwa.Ngexesha elifanayo, iikristali ze-ettringite kunye ne-calcium silicate hydrate gels ziya kwenziwa.Iinqununu eziqinileyo zifakwe kwi-gel kunye neengqungquthela ze-samente ezingenamanzi.Njengoko i-hydration reaction iqhubela phambili, iimveliso ze-hydration zanda, kwaye iinqununu ze-polymer ziqokelela ngokuthe ngcembe kwi-capillary pores, zenze i-densely packed layer on the surface of the jel and on unhydrated particles cement particles.Amasuntswana e-polymer ahlanganisiweyo ngokuthe ngcembe azalise i-pores.
I-latex powder ephinda ikwazi ukuphucula amandla okugoba kunye namandla okubambelela odaka kuba inokwenza ifilimu yepolymer kumphezulu wamasuntswana odaka.Kukho ama-pores ebusweni befilimu, kwaye ubuso be-pores buzaliswe ngodaka, okunciphisa uxinzelelo loxinzelelo.Kwaye phantsi kwesenzo samandla angaphandle, kuya kuvelisa ukuphumla ngaphandle kokuphuka.Ukongezelela, udaka lwenza i-skeleton eqinile emva kokuba i-samente ifakwe emanzini, kwaye i-polymer kwi-skeleton inomsebenzi wokudibanisa okuhambayo, okufana nezicubu zomzimba womntu.I-membrane eyenziwe yi-polymer inokuthelekiswa namalungu kunye nemigqa, ukwenzela ukuba kuqinisekiswe ukuqina kunye nokuguquguquka kwe-skeleton eqinile.ubunzima.
Kwi-polymer-modified cement mortar system, ifilimu ye-polymer eqhubekayo kwaye epheleleyo idityaniswe ne-samente ye-samente kunye neengqungquthela zesanti, okwenza udaka lonke lube lukhuni kunye ne-denser, kwaye ngexesha elifanayo ukwenza yonke inethiwekhi ye-elastic ngokuzalisa i-capillaries kunye ne-cavities.Ke ngoko, ifilimu yepolymer inokuhambisa ngokufanelekileyo uxinzelelo kunye noxinzelelo lwe-elastic.Ifilimu ye-polymer ingakwazi ukuvala i-shrinkage cracks kwi-interface ye-polymer-mortar, iphilise i-shrinkage cracks, kwaye iphucule ukutywinwa kunye namandla adibeneyo odaka.Ubukho beendawo eziguquguqukayo kakhulu kunye nezinwebekayo zepolymer ziphucula ukuguquguquka kunye nokuqina kodaka, ukubonelela ngokuhambelana kunye nokuziphatha okuguquguqukayo kwi-skeleton eqinile.Xa kusetyenziswe amandla angaphandle, inkqubo yokusabalalisa i-microcrack ilibazisekile ngenxa yokuguquguquka okuphuculweyo kunye no-elasticity de kufike uxinzelelo oluphezulu.Imimandla ye-polymer edibeneyo iphinda isebenze njengesithintelo kwi-coalescence ye-microcracks kwi-cracks engena.Ngoko ke, i-polymer powder ehlaziywayo iphucula uxinzelelo lokungaphumeleli kunye nokungaphumeleli kwezinto eziphathekayo.
Ixesha lokuposa: Feb-20-2023