Redispersible latex foda tare da sauran inorganic binders (kamar sumunti, slaked lemun tsami, gypsum, da dai sauransu) da kuma daban-daban aggregates, fillers da sauran Additives (kamar methyl hydroxypropyl cellulose ether, sitaci ether, lignocellulose, hydrophobic wakili, da dai sauransu) don jiki hadawa. don yin busassun gauraye turmi. Lokacin da aka ƙara busassun turmi a cikin ruwa kuma a motsa, za a watsar da barbashin latex foda a cikin ruwa a ƙarƙashin aikin colloid na kariya na hydrophilic da injin injin. Lokacin da ake buƙata don tarwatsa foda na latex na yau da kullun gajere ne, kuma wannan fihirisar lokacin sake watsawa shima muhimmin ma'auni ne don bincika ingancinsa. A farkon matakin haɗuwa, foda na latex ya riga ya fara rinjayar rheology da aiki na turmi.
Saboda halaye daban-daban da gyare-gyare na kowane nau'i na latex foda, wannan tasirin kuma ya bambanta, wasu suna da tasiri mai tasiri, wasu kuma suna da tasirin thixotropy. Tsarin tasirinsa ya fito ne daga bangarori da yawa, ciki har da tasirin latex foda akan kusancin ruwa yayin watsawa, tasirin danko daban-daban na latex foda bayan watsawa, tasirin colloid mai kariya, da tasirin siminti da belin ruwa. Tasirin ya haɗa da haɓakar abubuwan da ke cikin iska a cikin turmi da kuma rarraba kumfa na iska, da kuma tasirin abubuwan da ke tattare da shi da kuma hulɗar da sauran abubuwan da suka dace. Sabili da haka, zaɓi na musamman da rarrabuwa na redispersible latex foda wata hanya ce mai mahimmanci don rinjayar ingancin samfur. Babban ra'ayi na yau da kullum shine cewa foda na latex wanda za'a iya rarrabawa yawanci yana ƙara yawan iskar turmi, ta haka ne yake sa aikin ginin turmi, da alaƙa da dankowar ƙwayar latex, musamman ma colloid mai kariya, don shayarwa idan an tarwatsa shi. Ƙarfafa ƙaddamarwa yana taimakawa wajen inganta haɗin gwiwar ginin ginin, don haka inganta aikin turmi. Daga baya, jika turmi dauke da latex foda watsawa da ake amfani a kan aikin surface. Tare da raguwar ruwa a kan matakan uku - sha na tushe Layer, da amfani da siminti hydration dauki, da kuma volatilization na saman ruwa zuwa iska, da guduro barbashi sannu a hankali kusanci , da musaya a hankali ci da juna, kuma a karshe ya zama. fim ɗin polymer mai ci gaba. Wannan tsari yana faruwa ne a cikin ramukan turmi da kuma saman daskararrun.
Ya kamata a jaddada cewa don yin wannan tsari ba zai iya jurewa ba, wato, lokacin da fim din polymer ya sake cin karo da ruwa, ba za a sake tarwatsa shi ba, kuma dole ne a rabu da colloid mai kariya na redispersible latex foda daga tsarin fim din polymer. Wannan ba matsala ba ne a tsarin turmi na simintin alkaline, domin za a samu sapon da alkali da ruwan siminti ya samar, a lokaci guda kuma, tallan kayan kamar quartz zai rabu da shi a hankali daga tsarin, ba tare da kariyar kariya ba. hydrophilicity Colloid, wanda ba a iya narkewa a cikin ruwa da kuma kafa ta daya-lokaci watsawa na redispersible latex foda, iya aiki ba kawai a karkashin bushe yanayi, amma kuma a karkashin dogon lokaci ruwa. yanayin nutsewa. A cikin tsarin da ba na alkaline ba, irin su tsarin gypsum ko tsarin tare da masu cikawa kawai, saboda wasu dalilai har yanzu colloid mai kariya yana wanzu a cikin fim din polymer na ƙarshe, wanda ke rinjayar juriya na ruwa na fim din, amma saboda waɗannan tsarin ba a yi amfani da su ba. yanayin na dogon lokaci nutsewa a cikin ruwa, kuma polymer har yanzu yana da na musamman inji Properties, shi ba ya shafar aikace-aikace na redispersible latex foda a cikin wadannan tsarin.
Tare da samuwar fim ɗin polymer na ƙarshe, an kafa tsarin tsarin da ke tattare da inorganic da masu ɗaure a cikin turmi da aka warke, wato, kayan aikin hydraulic ya zama tsarin gaggautsa da wuyar tsari, kuma foda na latex wanda za'a iya rarrabawa ya samar da fim tsakanin rata m surface. Haɗi mai sassauƙa. Irin wannan haɗin za a iya tunanin kamar an haɗa shi da kwarangwal ta ƙananan maɓuɓɓugan ruwa da yawa. Tun da ƙarfin juzu'i na fim ɗin resin polymer da aka kafa ta hanyar latex foda yawanci tsari ne mai girma fiye da na kayan aikin hydraulic, ƙarfin turmi da kansa zai iya inganta, wato, haɗin kai zai inganta. Tun da sassaucin ra'ayi da nakasar polymer sun fi girma fiye da na tsayayyen tsari irin su siminti, an inganta nakasar turmi, kuma tasirin tarwatsa damuwa yana inganta sosai, don haka inganta juriya na turmi.
Lokacin aikawa: Maris-07-2023