Impuphu ye-polymer ehlakazekayo kanye nezinye izihlanganisi ezingaphili (njengesimende, i-slaked lime, i-gypsum, njll.) kanye nama-aggregates ahlukahlukene, ama-fillers kanye nezinye izithasiselo (njenge-methyl hydroxypropyl cellulose ether, i-starch ether, i-lignocellulose, ama-hydrophobic Agents, njll.) zixutshwa ngokomzimba ukuze kwenziwe i-dry-mixed mortar. Lapho i-dry-mixed mortar ixutshwa namanzi, ngaphansi kwesenzo se-hydrophilic protective colloid kanye ne-mechanical shearing, izinhlayiya ze-latex powder zizohlakazeka emanzini.
Ngenxa yezici ezahlukene kanye nokuguqulwa kwempuphu ngayinye ye-latex ehlukanisiwe, lo mphumela nawo uhlukile, eminye inomphumela wokukhuthaza ukugeleza, kanti eminye inomphumela wokwandisa i-thixotropy. Indlela esebenza ngayo ithonya layo ivela ezicini eziningi, okuhlanganisa ithonya lempuphu ye-latex ekuqineni kwamanzi ngesikhathi sokuhlakazeka, ithonya le-viscosity ehlukene yempuphu ye-latex ngemva kokuhlakazeka, ithonya le-colloid evikelayo, kanye nethonya le-samente nebhande lamanzi. Ithonya lezi zinto ezilandelayo lifaka phakathi ithonya ekwandeni kokuqukethwe komoya kwe-mortar kanye nokusatshalaliswa kwama-bubble omoya, kanye nethonya lezithasiselo zayo kanye nokusebenzisana nezinye izithasiselo. Ngakho-ke, ukukhethwa okwenziwe ngokwezifiso nokuhlukanisiwe kwempuphu ye-polymer ehlakazekayo kuyindlela ebalulekile yokuthinta ikhwalithi yomkhiqizo. Phakathi kwazo, umbono ovame kakhulu ukuthi impuphu ye-polymer ehlakazekayo ivame ukwandisa okuqukethwe komoya kwe-mortar, ngaleyo ndlela igcobe ukwakhiwa kwe-mortar, kanye ne-viscosity ne-viscosity yempuphu ye-polymer, ikakhulukazi lapho i-colloid evikelayo ihlakazeka, emanzini. Ukwanda kwe-α kunegalelo ekuthuthukiseni ukuhlangana kwe-mortar yokwakha, ngaleyo ndlela kuthuthukiswe ukusebenza kahle kwe-mortar. Ngemva kwalokho, i-mortar emanzi equkethe ukuhlakazeka kwe-latex powder ifakwa endaweni yokusebenza. Ngokuncipha komswakama emazingeni amathathu - ukumuncwa kwesendlalelo sesisekelo, ukusetshenziswa kwe-samente hydration reaction, kanye nokuguquguquka komswakama womphezulu emoyeni, izinhlayiya ze-resin zisondela kancane kancane ku-, i-interface ihlangana kancane kancane, futhi ekugcineni iba ifilimu ye-polymer eqhubekayo. Le nqubo yenzeka kakhulu ezimbotsheni ze-mortar kanye nobuso be-solid.
Kufanele kugcizelelwe ukuthi, ukuze le nqubo ingenzeki, okungukuthi, lapho ifilimu ye-polymer ingaphinde ihlakazeke lapho ihlangana namanzi futhi, i-colloid evikelayo yempuphu ye-polymer ephinde ihlakazeke kumele ihlukaniswe nohlelo lwefilimu ye-polymer. Lokhu akuyona inkinga ohlelweni lwe-alkaline cement mortar, ngoba izofakwa i-saponified yi-alkali ekhiqizwa ukumuncwa kwe-simende, futhi ngesikhathi esifanayo, ukumuncwa kwezinto ze-quartz kuzoyihlukanisa kancane kancane nohlelo ngaphandle kokuvikelwa kwe-hydrophilic. I-Colloid, ifilimu engancibiliki emanzini futhi eyakhiwe ukuhlakazwa kwempuphu ye-latex ephinde ihlakazeke, ingasebenza hhayi kuphela ngaphansi kwezimo ezomile, kodwa futhi nangaphansi kwezimo zokucwiliswa emanzini isikhathi eside. Ezinhlelweni ezingezona i-alkaline, njengezinhlelo ze-gypsum noma izinhlelo ezinezigcwalisi kuphela, ama-colloid avikelayo asekhona ngokwengxenye kwifilimu yokugcina ye-polymer ngesizathu esithile, okuthinta ukumelana kwamanzi kwefilimu, kodwa njengoba lezi zinhlelo zingasetshenziswa Endabeni yokucwiliswa emanzini isikhathi eside, futhi i-polymer isenezakhiwo zayo ezihlukile zemishini, ayithinti ukusetshenziswa kwempuphu ye-polymer ehlakazekayo kulezi zinhlelo.
Isikhathi sokuthunyelwe: Ephreli-25-2024