Dispersible polima ufa ndi zina zomangira inorganic (monga simenti, slaked laimu, gypsum, etc.) ndi aggregates osiyanasiyana, fillers ndi zina (monga methyl hydroxypropyl mapadi efa, wowuma efa, lignocellulose, hydrophobic Agents, etc.) ndi thupi osakaniza kuti matope dry-mix. Pamene matope osakaniza owuma amasakanikirana ndi madzi, pansi pa zochita za hydrophilic zoteteza colloid ndi kumeta ubweya wamakina, tinthu tating'onoting'ono ta latex tidzamwazikana m'madzi.
Chifukwa cha mikhalidwe yosiyana ndi kusinthidwa kwa ufa uliwonse wogawanika wa latex, zotsatirazi zimakhalanso zosiyana, zina zimakhala ndi zotsatira zolimbikitsa kutuluka, pamene zina zimakhala ndi zotsatira zowonjezera thixotropy. Njira ya chikoka chake imachokera kuzinthu zambiri, kuphatikizapo chikoka cha ufa wa latex pa mgwirizano wa madzi panthawi ya kubalalitsidwa, chikoka cha kukhuthala kosiyana kwa latex ufa pambuyo pa kubalalitsidwa, mphamvu ya colloid yoteteza, ndi mphamvu ya simenti ndi lamba wamadzi. Chikoka cha zinthu zotsatirazi zikuphatikizapo chikoka pa kuchuluka kwa mpweya zili mu matope ndi kugawa mpweya thovu, komanso chikoka cha zina zake ndi kugwirizana ndi zina. Choncho, kusankha makonda ndi kugawanika kwa redispersible polima ufa ndi njira yofunika kukhudza khalidwe mankhwala. Pakati pawo, mfundo wamba maganizo ndi kuti redispersible polima ufa zambiri kumawonjezera zili mpweya wa matope, potero lubricating yomanga matope, ndi kuyanjana ndi mamasukidwe akayendedwe a ufa polima, makamaka pamene zoteteza colloid omwazika, kuti madzi. Kuwonjezeka kwa α kumathandizira kukonza mgwirizano wa matope omanga, potero kumapangitsa kuti matopewo azigwira ntchito bwino. Pambuyo pake, matope onyowa omwe ali ndi kufalikira kwa ufa wa latex amagwiritsidwa ntchito pamalo ogwirira ntchito. Ndi kuchepetsa chinyezi pamiyeso itatu - mayamwidwe a m'munsi wosanjikiza, kumwa simenti hydration anachita, ndi volatilization pamwamba chinyezi mu mlengalenga, ndi utomoni particles pang'onopang'ono kuyandikira , mawonekedwe pang'onopang'ono merges wina ndi mzake, ndipo potsiriza amakhala mosalekeza polima filimu. Izi zimachitika makamaka pores a matope ndi pamwamba pa olimba.
Tiyenera kutsindika kuti, kuti njirayi ikhale yosasinthika, ndiye kuti, pamene filimu ya polima siidzabalalitsidwanso ikakumananso ndi madzi, colloid yotetezera ya ufa wopangidwa ndi polima iyenera kupatulidwa ndi filimu ya polima. Izi siziri vuto mu dongosolo la matope a alkaline simenti, chifukwa lidzapangidwa ndi saponified ndi alkali yopangidwa ndi hydration ya simenti, ndipo panthawi imodzimodziyo, kutengeka kwa zinthu za quartz kudzalekanitsa pang'onopang'ono ndi dongosolo popanda chitetezo cha hydrophilic. Colloid, filimu yomwe imakhala yosasungunuka m'madzi ndipo imapangidwa ndi kubalalitsidwa kamodzi kwa ufa wa latex wopangidwanso, sungathe kugwira ntchito pokhapokha pauma, komanso pansi pa mikhalidwe ya kumizidwa kwa nthawi yaitali m'madzi. Mu machitidwe osakhala amchere, monga machitidwe a gypsum kapena machitidwe omwe ali ndi fillers okha, ma colloids oteteza akadalipo pang'ono mufilimu yomaliza ya polima pazifukwa zina, zomwe zimakhudza kukana kwa madzi kwa filimuyi, koma popeza machitidwewa sagwiritsidwa ntchito pa Kumizidwa kwa nthawi yaitali m'madzi, ndipo polima akadali ndi mawonekedwe ake apadera, sizimakhudza kugwiritsa ntchito polima polima.
Nthawi yotumiza: Apr-25-2024