Redispersible latex powder kunye nezinye izibophelelo ezingaphiliyo (ezifana nesamente, slaked lime, gypsum, njl.) kunye neeaggregates ezahlukeneyo, izihluzi kunye nezinye izongezo (ezifana nemethyl hydroxypropyl cellulose ether, starch ether, lignocellulose, hydrophobic agent, njl.) ukwenza udaka oluxutyiweyo olomileyo.Xa udaka oluxutyiweyo olomileyo longezwa emanzini kwaye luxutywe, i-latex powder particles iya kuchithwa emanzini phantsi kwesenzo se-hydrophilic protective colloid kunye ne-shear mechanical.Ixesha elifunekayo ukuze i-latex powder eqhelekileyo i-dispersible ihlakazeke ifutshane kakhulu, kwaye le nkcazo yexesha lokuphinda iphinde iphinde iphinde ibe yipharamitha ebalulekileyo ukuhlola umgangatho wayo.Kwinqanaba lokuqala lokuxuba, i-latex powder sele iqalile ukuchaphazela i-rheology kunye nokusebenza komdaka.
Ngenxa yeempawu ezahlukeneyo kunye nokuguqulwa komgubo ngamnye we-latex owahlulwe, esi siphumo sikwahluke, ezinye zineempembelelo zokuncedisa ukuhamba, kwaye ezinye zinefuthe elikhulayo le-thixotropy.Indlela yempembelelo yayo ivela kwiinkalo ezininzi, kubandakanywa impembelelo ye-latex powder kwi-affinity yamanzi ngexesha lokusabalalisa, impembelelo ye-viscosity eyahlukeneyo ye-latex powder emva kokusabalalisa, impembelelo ye-colloid ekhuselayo, kunye nefuthe le-samente kunye namabhanti amanzi.Iimpembelelo zibandakanya ukwanda komxholo womoya kwi-mortar kunye nokusabalalisa ama-bubbles emoyeni, kunye nefuthe lezongezo zalo kunye nokusebenzisana nezinye izongezo.Ngoko ke, ukhetho olukhethiweyo kunye nolwahlulo lwe-latex powder oludityanisiweyo luyindlela ebalulekileyo yokuchaphazela umgangatho wemveliso.Eyona mbono ixhaphakileyo kukuba i-latex powder ephinda ihlaziywe ngokuqhelekileyo inyusa umthamo womoya wodaka, ngaloo ndlela ithambisa ukwakhiwa kodaka, kunye nokuhambelana kunye ne-viscosity ye-latex powder, ngakumbi i-colloid ekhuselayo, emanzini xa ichithwa. Ukunyuka koxinzelelo kunceda ukuphucula ukudibanisa kodaka lokwakha, ngaloo ndlela kuphuculwe ukusebenza kodaka.Emva koko, udaka olumanzi oluqulethe i-latex powder dispersion lusetyenziswa kumphezulu womsebenzi.Ngokuncitshiswa kwamanzi kumanqanaba amathathu - ukufunxwa komgangatho wesiseko, ukusetyenziswa kwe-cement hydration reaction, kunye nokuguquguquka kwamanzi angaphezulu emoyeni, amasuntswana e-resin asondela ngokuthe ngcembe, i-interfaces ngokuthe ngcembe ihlangana enye kwenye, kwaye ekugqibeleni ifilimu yepolymer eqhubekayo.Le nkqubo iyenzeka ikakhulu kwimibhobho yodaka kunye nomphezulu wokuqina.
Kufuneka kugxininiswe ukuba ukwenza le nkqubo ingabi nakuguqulwa, oko kukuthi, xa ifilimu ye-polymer idibana namanzi kwakhona, ayiyi kusasazwa kwakhona, kwaye i-colloid ekhuselekileyo ye-latex powder edibeneyo kufuneka ihlulwe kwinkqubo yefilimu ye-polymer.Oku akuyongxaki kwi-alkaline sement mortar system, kuba iya kuhlanjululwa yi-alkali eveliswa yi-cement hydration, kwaye kwangaxeshanye, i-adsorption yezinto ezifana ne-quartz iya kuhlukanisa ngokuthe ngcembe kwinkqubo, ngaphandle kokukhuselwa. i-hydrophilicity Colloids, enganyibilikiyo emanzini kwaye yenziwe yi-dispersion yexesha elinye le-latex powder ephinda isebenze, ayikwazi ukusebenza kuphela phantsi kweemeko ezomileyo, kodwa naphantsi kweemeko zokucwiliswa kwamanzi ixesha elide.Kwiinkqubo ezingezizo zealkali, ezifana neenkqubo zegypsum okanye iinkqubo ezinezahlulo kuphela, ngenxa yesizathu esithile i-colloid ekhuselayo isekho ngokuyinxenye kwifilimu ye-polymer yokugqibela, echaphazela ukuxhathisa kwamanzi kwifilimu, kodwa ngenxa yokuba ezi nkqubo azisetyenziselwanga. imeko yokuntywiliselwa ixesha elide emanzini, kwaye i-polymer isenayo iimpawu zayo ezizodwa, ayichaphazeli ukusetyenziswa komgubo we-latex owenziwe ngokutsha kwezi nkqubo.
Ngokuqulunqwa kwefilimu ye-polymer yokugqibela, inkqubo yesikhokelo equlunqwe yi-inorganic kunye ne-organic binders yenziwa kwi-mortar ephilisiwe, oko kukuthi, izinto ze-hydraulic zenza isakhelo esinqabileyo kunye nesinzima, kwaye i-latex powder edibeneyo yenza ifilimu phakathi kwe-gap kunye. umphezulu oqinileyo.Uqhagamshelo oluthambileyo.Olu hlobo loqhagamshelo lunokucingelwa ludityaniswe kwi-skeleton eqinile ngemithombo emincinci emininzi.Ekubeni ukuqina kokuqina kwefilimu ye-polymer resin eyenziwe ngumgubo we-latex ngokuqhelekileyo i-odolo yobukhulu obuphezulu kunezinto ze-hydraulic, amandla omdaka ngokwawo anokuphuculwa, oko kukuthi, ukudibanisa kuphuculwe.Ekubeni ukuguquguquka kunye nokukhubazeka kwepolymer kuphezulu kakhulu kunesakhiwo esiqinileyo njengesamente, ukukhubazeka komdaka kuphuculwe, kwaye umphumo wokusabalalisa uxinzelelo uphuculwe kakhulu, ngaloo ndlela uphucula ukuchasana kokuqhekeka kodaka.
Ixesha lokuposa: Mar-07-2023