I-powder ye-latex ye-redispersible inokuphucula iipropati zodaka ezifana namandla okuguquguquka kunye namandla okunamathela, kuba inokwenza ifilimu ye-polymer ebusweni bamaqhekeza omdaka. Kukho ama-pores ebusweni befilimu, kwaye umphezulu we-pores uzaliswe 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 idibeneyo kunye ne-samente ye-samente kunye neengqungquthela zesanti, okwenza udaka lonke lube lukhuni kunye ne-denser, kwaye ngexesha elifanayo lenza 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. Ke ngoko, i-polymer powder ehlaziywayo iphucula uxinzelelo lokungaphumeleli kunye nokungaphumeleli koxinzelelo lwezinto.
Ukongeza i-latex powder kwi-cement mortar iya kwenza ifilimu yenethiwekhi ye-polymer eguquguqukayo kakhulu kunye ne-elastic, eya kuphucula kakhulu ukusebenza kodaka, ngakumbi amandla okuqina omdaka aya kuphuculwa kakhulu. Xa kusetyenziswe amandla angaphandle, ngenxa yokuphuculwa kokubambisana okupheleleyo komdaka kunye ne-elasticity ethambileyo yepolymer, ukuvela kwe-micro-cracks kuya kulungiswa okanye kuncitshiswe. Ngempembelelo yomxholo we-latexr powder kumandla omdaka wokufakelwa kwe-thermal, kufunyenwe ukuba amandla e-tensile bond of thermal insulation mortar ayanda ngokunyuka komxholo we-latex powder; amandla okuguquguquka kunye namandla oxinzelelo aneqondo elithile kunye nokunyuka komxholo we-latex powder. Iqondo lokuhla, kodwa lihlangabezana neemfuno zokuphela kodonga lwangaphandle.
Udaka lwesamente oluxutywe kunye ne-latex powder, amandla ayo okudibanisa i-28d ayanda ngokunyuka komxholo we-latex powder. Ngokunyuka komxholo we-latex powder, ukukwazi ukudibanisa udaka lwesamente kunye nomhlaba omdala wekhonkrithi uyaphuculwa, oqinisekisa iingenelo zayo zokulungisa i-pavement yekhonkrithi yesamente kunye nezinye izakhiwo. Ngaphezu koko, umlinganiselo wokugotywa kodaka uyanda ngokunyuka komxholo we-latex powder, kwaye ukuguquguquka kodaka lomphezulu kuphucula. Ngelo xesha, kwafunyaniswa ukuba ngokunyuka kwe-latex powder content, i-modulus elastic of mortar yehla kuqala kwaye yanda. Lilonke, ngokunyuka komlinganiselo wokuqokelelwa kothuthu, i-elastic modulus kunye ne-deformation modulus yodaka ziphantsi kunezo zodaka oluqhelekileyo.
Ixesha lokuposa: Mar-14-2023