Umgubo welatex ophinda udityaniswe nezinye izinto ezidityaniswe nezinto ezingaphiliyo (ezifana nesamente, ilayimu etyibilikiweyo, igypsum, njl.njl.) kunye nee-aggregates ezahlukeneyo, izizalisi kunye nezinye izongezo (ezifana ne-methyl hydroxypropyl cellulose ether, i-starch ether, i-lignocellulose, i-hydrophobic agent, njl.njl.) zokuxuba ngokwasemzimbeni ukwenza umdaka oxutywe nomileyo. Xa umdaka oxutyiweyo nowomileyo wongezwa emanzini kwaye uxutywa, amasuntswana e-latex powder aya kusasazeka emanzini phantsi kwesenzo se-hydrophilic protective colloid kunye ne-mechanical shear. Ixesha elifunekayo ukuze umgubo welatex ophinda udityaniswe noqhelekileyo usasazeke lifutshane kakhulu, kwaye olu luhlu lwexesha lokuphinda udityaniswe nalo luphawu olubalulekileyo lokuhlola umgangatho walo. Kwinqanaba lokuqala lokuxuba, umgubo welatex sele uqalile ukuchaphazela i-rheology kunye nokusebenza kakuhle komdaka.
Ngenxa yeempawu ezahlukeneyo kunye notshintsho lwepowder nganye yelatex ehlulwe-hlulwe, le mpembelelo nayo yahlukile, ezinye zinefuthe lokunceda ukuhamba kwamanzi, kwaye ezinye zinefuthe elandayo lethixotropy. Indlela esebenza ngayo impembelelo yayo ivela kwiinkalo ezininzi, kubandakanya impembelelo yepowder yelatex ekubambeni kwamanzi ngexesha lokusasazeka, impembelelo ye-viscosity eyahlukeneyo yepowder yelatex emva kokusasazeka, impembelelo ye-colloid ekhuselayo, kunye nempembelelo yesamente kunye neebhanti zamanzi. Iimpembelelo ziquka ukwanda komxholo womoya kwi-mortar kunye nokusasazwa kwamaqamza omoya, kunye nempembelelo yezongezo zayo kunye nokusebenzisana nezinye izongezo. Ke ngoko, ukhetho olwenziwe ngokwezifiso nolwahlulwe-hlulwe lwepowder yelatex ehlulwe-hlulwe yindlela ebalulekileyo yokuchaphazela umgangatho wemveliso. Ingongoma eqhelekileyo kukuba ipowder yelatex ehlulwe-hlulwe idla ngokunyusa umxholo womoya kwi-mortar, ngaloo ndlela ithambise ukwakhiwa kwe-mortar, kunye ne-affinity kunye ne-viscosity yepowder yelatex, ngakumbi i-colloid ekhuselayo, emanzini xa isasazeka. Ukwanda koxinzelelo kunceda ukuphucula ukudibana kwe-mortar yokwakha, ngaloo ndlela kuphuculwe ukusebenza kwe-mortar. Emva koko, i-mortar emanzi equlethe i-latex powder dispersion ifakwa kumphezulu womsebenzi. Ngokuncitshiswa kwamanzi kumanqanaba amathathu - ukufunxwa komaleko osisiseko, ukusetyenziswa kwe-samente hydration reaction, kunye nokuguquguquka kwamanzi angaphezulu emoyeni, amasuntswana e-resin asondela kancinci kancinci, i-interfaces idibana kancinci kancinci, kwaye ekugqibeleni ibe yifilimu ye-polymer eqhubekayo. Le nkqubo yenzeka ikakhulu kwiimbobo ze-mortar kunye nomphezulu we-solid.
Kufuneka kugxininiswe ukuba ukuze le nkqubo ingabi saguqulwa, oko kukuthi, xa ifilimu yepolymer idibana namanzi kwakhona, ayisayi kuphinda isasazeke, kwaye i-colloid ekhuselayo yomgubo we-latex ophinda usasazeke kufuneka yahlulwe kwinkqubo yefilimu yepolymer. Oku akuyongxaki kwinkqubo yodaka lwesamente ye-alkaline, kuba iya kuxutywa yi-alkali eveliswa yi-samente hydration, kwaye kwangaxeshanye, ukufunxwa kwezinto ezifana ne-quartz kuya kuyihlukanisa kancinci kancinci kwinkqubo, ngaphandle kokukhuselwa yi-hydrophilicity Colloids, ezinganyibiliki emanzini kwaye zenziwe yi-once-time dispersion ye-latex powder ephinda isasazeke, ayinakusebenza kuphela phantsi kweemeko ezomileyo, kodwa naphantsi kweemeko zokuntywiliselwa emanzini ixesha elide. Kwiinkqubo ezingezizo ii-alkaline, ezifana neenkqubo ze-gypsum okanye iinkqubo ezinezizalisi kuphela, ngesizathu esithile i-colloid ekhuselayo isekhona ngokuyinxenye kwifilimu yokugqibela ye-polymer, echaphazela ukumelana kwamanzi kwefilimu, kodwa ngenxa yokuba ezi nkqubo azisetyenziselwa Kwimeko yokuntywiliselwa emanzini ixesha elide, kwaye i-polymer iseneempawu zayo ezizodwa zoomatshini, ayichaphazeli ukusetyenziswa komgubo we-latex ophinda uqhekeke kwezi nkqubo.
Xa kusenziwa ifilimu yokugqibela yepolymer, inkqubo yesakhelo eyenziwe ngezinto ezingezizo izinto eziphilayo neziphilayo yenziwa kwi-mortar ecociweyo, oko kukuthi, izinto ze-hydraulic zenza isakhelo esibuthathaka nesiqinileyo, kwaye umgubo we-latex ophinda uqhekeke wenza ifilimu phakathi kwesithuba kunye nomphezulu oqinileyo. Uqhagamshelo oluguquguqukayo. Olu hlobo loqhagamshelo lunokucingelwa njengoluqhagamshelwe kwi-skeleton eqinileyo ziziphethu ezininzi ezincinci. Ekubeni amandla okuxinana kwefilimu ye-polymer resin eyenziwe yi-latex powder adla ngokuba mkhulu kakhulu kunezixhobo ze-hydraulic, amandla e-mortar ngokwawo anokomelezwa, oko kukuthi, ukuhambelana kuphuculwe. Ekubeni ukuguquguquka kunye nokuguquguquka kwe-polymer kuphezulu kakhulu kunesakhiwo esiqinileyo njengesamente, ukuguquguquka kwe-mortar kuphuculwe, kwaye isiphumo soxinzelelo lokusasazeka siphucuka kakhulu, ngaloo ndlela siphucula ukumelana nokuqhekeka kwe-mortar.
Ixesha lokuthumela: Matshi-07-2023