Umgubo we-latex ophinda uqhekeke sisixhobo esisetyenziswa kakhulu kwi-organic gelling, esinokuphinda sisasazwe ngokulinganayo emanzini ukuze senze i-emulsion emva kokudibana namanzi. Ukongeza umgubo we-latex ophinda uqhekeke kunokuphucula ukusebenza kokugcinwa kwamanzi komotha wesamente osandul’ ukuhlanganiswa, kunye nokusebenza kokubopha, ukuguquguquka, ukungangeni kwamanzi kunye nokumelana nokugqwala komotha wesamente oqinileyo. Umgubo we-latex utshintsha ukuhambelana kunye nokutyibilika kwenkqubo kwimeko yokuxuba emanzi, kwaye ukuhlangana kuyaphucuka ngokongeza umgubo we-latex. Emva kokomiswa, ibonelela ngomgangatho womphezulu ogudileyo noxineneyo onamandla okubambisana, kwaye iphucula isiphumo somphezulu wesanti, igrabile kunye nee-pores. , etyetyisiweyo ibe yifilimu kumphezulu, okwenza izinto zibe bhetyebhetye ngakumbi, inciphise i-elastic modulus, ifunxe uxinzelelo lokuguquguquka kobushushu kakhulu, kwaye inokumelana namanzi kwinqanaba lokugqibela, kwaye ubushushu be-buffer kunye nokuguquguquka kwezinto azihambelani.
Ukwenziwa kwefilimu yepolymer eqhubekayo kubaluleke kakhulu ekusebenzeni kweemortar zesamente eziguqulwe yipolymer. Ngexesha lokuseta kunye nokuqina kwepaste yesamente, kuza kuveliswa imingxunya emininzi ngaphakathi, eziza kuba ziindawo ezibuthathaka zepaste yesamente. Emva kokuba umgubo welatex ophinda uqhekeke wongezwe, umgubo welatex uza kwanda ngoko nangoko ube yi-emulsion xa udibana namanzi, kwaye uqokelele kwindawo enamanzi amaninzi (oko kukuthi, kwindawo enomngxunya). Njengoko ipaste yesamente iqina kwaye iqina, intshukumo yamasuntswana epolymer iyancitshiswa ngakumbi, kwaye uxinzelelo phakathi kwamanzi nomoya lubanyanzela ukuba bavumelane kancinci kancinci. Xa amasuntswana epolymer edibana, inethiwekhi yamanzi iyaphela nge-capillaries, kwaye ipolymer yenza ifilimu eqhubekayo ejikeleze umngxunya, iqinisa la mabala abuthathaka. Ngeli xesha, ifilimu yepolymer ayinakudlala indima ye-hydrophobic kuphela, kodwa ayinakuyithintela i-capillary, ukuze izinto zibe ne-hydrophobic elungileyo kunye nokuvuleka komoya.
I-samente mortar engena-polymer idityaniswe ngokukhululekileyo. Ngokwahlukileyo koko, i-polymer modified cement mortar yenza yonke i-samente idityaniswe ngokuqinileyo ngenxa yokubakho kwe-polymer film, ngaloo ndlela ifumana iipropati ezingcono zoomatshini kunye nokumelana nemozulu. Kwi-latex powder modified cement mortar, i-latex powder iya kwandisa i-porosity ye-samente paste, kodwa inciphise i-porosity yendawo yokutshintsha i-interface phakathi kwe-samente paste kunye ne-aggregate, nto leyo ebangela ukuba i-porosity iyonke ye-mortar ingatshintshi. Emva kokuba i-latex powder yenziwe ibe yi-film, ingayivala ngcono i-pores kwi-mortar, yenze ulwakhiwo lwe-interface transition zone phakathi kwe-samente paste kunye ne-aggregate lube lukhuni ngakumbi, kwaye ukumelana nokuvuleka kwe-latex powder modified mortar kuphuculwe, kwaye amandla okumelana nokukhukuliseka kwe-media eyingozi ayanda. Inefuthe elihle ekuphuculeni ukuqina kwe-mortar.
Ixesha lokuthumela: Matshi-14-2023