Re-Dispersible polymer powderszi-emulsions ezitshiziweyo ezithi, xa zixutywe namanzi okanye amanzi kudaka, zenze i-dispersion efanayo ezinzileyo njenge-emulsion yokuqala. I-polymer yenza i-polymer network structure kwi-mortar, efana ne-polymer emulsion properties kwaye iguqule udaka. Uphawu lwepolymer powder ehlakazekayo kukuba le powder ingahlakazwa kanye kuphela, kwaye ayiyi kuphinda ihlakazwe xa udaka luba manzi kwakhona emva kokuqina. Ukuveliswa komgubo wepolymer owenziwe ngokutsha kuye kwaphucula kakhulu ukusebenza kodaka olomileyo. Kwi-bonding mortar yeepaneli zokuhombisa, kukho iimfuno ezininzi zobuninzi bepolymer latex powder. Ukongezwa kwayo kuphucula amandla e-flexural, ukumelana nokuqhekeka, amandla okubambelela, ukuqina kunye nokuqina kodaka, onokuthi ugweme. Ukucutheka kodaka kunye nokuqhekeka kunokunciphisa ubukhulu bomgangatho wokubopha. I-polymer latex powder ehlaziywayo inokuphucula iimpawu ezingentla zodaka ngenxa yokuba inokwenza ifilimu ye-polymer ebusweni bamaqhekeza omdaka. Kukho ama-pores ebusweni befilimu, kwaye umphezulu we-pores uzaliswe ngodaka, okunciphisa uxinzelelo kunye nokunciphisa amandla angaphandle. Ngaphantsi kwesenzo siya kuvelisa ukuphumla ngaphandle komonakalo. Ukongeza, udaka lwenza i-skeleton eqinile emva kwe-cement hydration, kwaye ifilimu eyenziwe yi-polymer inokuphucula ukuqina kunye nokuqina kwe-skeleton eqinile, kunye ne-polymer latex powder enokuphinda iphuculwe inokuphucula amandla obunzima bodaka.
Umphumo wokuthanjiswa phakathi kwe-polymer powder particles edibeneyo yenza ukuba amacandelo omdaka ahambe ngokuzimeleyo. Ngelo xesha, inempembelelo yokuphefumula emoyeni, inika ukunyanzeliswa kodaka, ngoko inokuphucula ukwakhiwa kunye nokusebenza kodaka. Amandla anyanzeliswayo omdaka we-polymer ayancipha ngokunyuka komxholo we-rubber powder, amandla e-flexural ayanda ngokunyuka komxholo we-rubber powder, kunye ne-compression-folding ratio ibonisa ukuhla.
Uvavanyo lubonisa ukuba i-latex powder ehlaziywayo inokuguqula umdaka kwaye ngokucacileyo inokuphucula ukuguquguquka kodaka. I-latex ye-polymer resin ye-latex ye-redispersible inokuphucula amandla okuguquguquka kodaka, ngakumbi amandla okuqala okuguquguquka kodaka. I-polymer idibanisa kwi-capillary pores yodaka oluqinileyo kwaye lusebenza njengento yokuqinisa. Ukongezwa kweepolymer powders ezihlakazekayo kunokuphucula kakhulu amandla ebhondi yodaka, ngakumbi xa kudibanisa izinto ezahlukeneyo, ezifana nokubambelela kwiithayile ze-ceramic. Ngokunyuka komthamo we-rubber powder, amandla okuguquguquka kunye namandla okunamathela nawo anyuka.
Ukubandakanya i-polymer powder ehlaziywayo kunokuphucula kakhulu ukuguquguquka kwemvelo kunye nokuchasana kwe-deformation yezinto eziphathekayo, ngoko kunegalelo kumandla okuguquka kunye namandla okudibanisa kwezinto. Emva kokongeza i-polymer kwi-matrix ye-samente, amandla okuqina aya kuphuculwa kakhulu. Ngexesha lenkqubo yokuqina kwesamente, kuya kubakho imingxuma emininzi ngaphakathi. Le mingxuma izaliswe ngamanzi ekuqaleni. Xa isamente icolile kwaye yomiswe, ezi ndawo ziba yimingxuma. Ngokuqhelekileyo kucatshangelwa ukuba le mibhobho ngamanqaku abuthathaka e-matrix yesamente. inxalenye. Xa i-polymer powder e-dispersible iqulethwe kwinkqubo ye-samente, ezi powders ziya kusasaza ngokukhawuleza kwaye zigxininise kwindawo enobuncwane bamanzi, oko kukuthi, kule miqolo. Emva kokuba amanzi omile. I-polymer yenza ifilimu ejikeleze imingxuma, ngaloo ndlela iqinisa la manqaku abuthathaka. Oko kukuthi, ukongeza inani elincinci le-latex powder elinokuphinda liphindwe kwakhona kunokuphucula kakhulu amandla ebhondi.
Ixesha lokuposa: Oct-25-2022