Redispersible latex powder kunye nezinye izibophelelo ezingaphiliyo (ezifana nesamente, slaked lime, gypsum, njl.) kunye aggregates ezahlukeneyo, fillers kunye nezinye izongezo (ezifana methyl hydroxypropyl cellulose ether, starch ether, lignocellulose, agent hydrophobic, njl. 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 yeyokuba i-latex powder ephinda ihlaziywe idla ngokunyusa umthamo womoya wodaka, ngaloo ndlela ithambisa ukwakhiwa kodaka, kunye nokudibana kunye ne-viscosity ye-latex powder, ngakumbi i-colloid ekhuselayo, emanzini xa isasazwa Ukonyuka koxinzelelo kunceda ekuphuculeni ukudityaniswa 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 ne-volatilization yamanzi angaphezulu emoyeni, amasuntswana e-resin asondela ngokuthe ngcembe, i-interfaces idibanisa ngokuthe ngcembe enye kwenye, kwaye ekugqibeleni ibe yifilimu ye-polymer 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. Le ayisiyongxaki kwi-alkali ye-alkali yesamente, kuba iya kulungiswa yi-alkali eyenziwe ngesimbo se-qumed, ngaphandle kokukhuselwa kwe-hydrophility powder, kodwa ingekasebenzi kuphela phantsi kweemeko ezomileyo, kodwa kwaye nangaphantsi iimeko zokuntywiliselwa ixesha elide emanzini. Kwiinkqubo ezingezizo zealkaline, ezifana neenkqubo zegypsum okanye ezinezahlulo kuphela, ngenxa yesizathu esithile i-colloid ekhuselayo isekho ngokuyinxenye kwifilimu yepolymer yokugqibela, echaphazela ukuxhathisa kwamanzi kwefilimu, kodwa ngenxa yokuba ezi nkqubo azisetyenziselwanga Kwimeko yokuntywiliselwa ixesha elide emanzini, kwaye i-polymer isenayo iimpawu zayo ezizodwa, ayichaphazeli ukusetyenziswa kwe-dex powder kwi-latex powder.
Ngokuqulunqwa kwefilimu yokugqibela ye-polymer, inkqubo yesakhelo esiqulunqwe yi-inorganic and organic binders yenziwa kwi-mortar ephilisiwe, oko kukuthi, izinto ze-hydraulic zenza i-brittle and hard framework, kwaye i-latex powder edibeneyo yenza ifilimu phakathi kwe-gap kunye nomhlaba oqinileyo. Uqhagamshelo oluthambileyo. Olu hlobo loqhagamshelo lunokucingelwa ludityaniswe kwi-skeleton eqinile ngemithombo emininzi emincinci. Ekubeni ukuqina kokuqina kwefilimu ye-polymer resin eyenziwe ngumgubo we-latex ngokuqhelekileyo ngumyalelo wobukhulu obuphezulu kunoko bezinto ze-hydraulic, amandla omdaka ngokwawo anokwandiswa, 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