Ekugqibeleni umgubo we-emulsion wenza ifilimu ye-polymer, kwaye inkqubo eyenziwe ngezakhiwo ze-inorganic kunye ne-organic binder yenziwa kwi-mortar ecociweyo, oko kukuthi, i-skeleton ebuthathaka neqinileyo eyenziwe ngezinto ze-hydraulic, kunye nefilimu eyenziwe yi-redispersible latex powder kwi-gap kunye nomphezulu oqinileyo. Amandla okuxinana kunye nokuhlangana kwefilimu ye-polymer resin eyenziwe yi-latex powder kuyaphuculwa. Ngenxa yokuguquguquka kwe-polymer, amandla okuguqulwa aphezulu kakhulu kunesakhiwo esiqinileyo selitye lesamente, ukusebenza kokuguqulwa kwe-mortar kuyaphucuka, kwaye isiphumo soxinzelelo lokusasazeka siphucuka kakhulu, ngaloo ndlela siphucula ukumelana nokuqhekeka kwe-mortar. Ngokunyuka komxholo we-redispersible latex powder, yonke inkqubo iphuhlisa iye kwiplastiki. Kwimeko yomxholo ophezulu we-latex powder, isigaba se-polymer kwi-mortar ecociweyo sidlula kancinci isigaba semveliso ye-inorganic hydration, kwaye i-mortar iya kutshintsha umgangatho kwaye ibe yi-elastomer, ngelixa imveliso ye-hydration yesamente iba "yi-filler".
Amandla okuxinana, ukuthamba, ukuguquguquka kunye nokutywinwa kwe-mortar eguqulwe yi-latex powder ephinda inyibilike konke kuphuculwe. Ukuxuba i-latex powder ephinda inyibilike kuvumela ifilimu ye-polymer (i-latex film) ukuba yakheke kwaye ibe yinxalenye yodonga lwe-pore, ngaloo ndlela ivale isakhiwo se-porosity ephezulu ye-mortar. I-latex membrane inendlela yokuzolula ngokwayo ekhupha uxinzelelo apho inamathele kwi-mortar. Ngala mandla angaphakathi, i-mortar igcinwa iyonke, ngaloo ndlela yonyusa amandla adibeneyo e-mortar. Ubukho bee-polymers eziguquguqukayo kakhulu nezithambileyo kakhulu buphucula ukuguquguquka kunye nokuqina kwe-mortar. Indlela yokwandisa uxinzelelo lwemveliso kunye namandla okungaphumeleli yile ilandelayo: xa kusetyenziswa amandla, ii-microcracks ziyalibaziseka de kufikelelwe kwiingcinezelo eziphezulu ngenxa yokuguquguquka okuphuculweyo kunye nokuqina. Ukongeza, iindawo ze-polymer ezidibeneyo zikwathintela ukuhlangana kwee-microcracks zibe ziintanda ezingenayo. Ke ngoko, i-polymer powder ephinda inyibilike iphucula uxinzelelo lokungaphumeleli kunye noxinzelelo lokungaphumeleli kwezinto.
Ifilimu yepolymer kwi-polymer modulator inefuthe elibaluleke kakhulu kwi-mortar eqinileyo. I-latex powder ephinda isasazwe kwi-interface idlala enye indima ebalulekileyo emva kokuba isasazekile kwaye yenziwe ifilimu, oko kukuthi ukwandisa ukunamathela kwizinto ezidityanisiweyo. Kwi-microstructure ye-powder polymer modified tile bonding mortar kunye ne-tile interface, ifilimu eyenziwe yi-polymer yenza ibhulorho phakathi kweethayile ezi-vitrified ezinokufunxwa kwamanzi okuphantsi kakhulu kunye ne-cement mortar matrix. Indawo yoqhagamshelwano phakathi kwezinto ezimbini ezahlukeneyo yindawo enomngcipheko omkhulu wokuba ii-crack shrinkage zenzeke kwaye zikhokelele ekulahlekelweni komanyano. Ke ngoko, amandla eefilimu ze-latex okuphilisa ii-crack shrinkage abaluleke kakhulu kwi-adhesives zethayile.
Ixesha lokuthumela: Matshi-06-2023