Redispersible latex ufa ndi zina zomangira inorganic (monga simenti, slaked laimu, gypsum, etc.) ndi aggregates zosiyanasiyana, fillers ndi zina (monga methyl hydroxypropyl mapadi efa, wowuma efa, lignocellulose, hydrophobic wothandizira, etc.) kwa thupi kusanganikirana kusakaniza. kupanga matope osakaniza owuma. Pamene matope osakaniza owuma akuwonjezeredwa kumadzi ndikugwedezeka, tinthu tating'ono ta latex tidzamwazikana m'madzi pansi pa zochita za hydrophilic protective colloid ndi kumeta ubweya wamakina. Nthawi yofunikira kuti ufa wokhazikika wa latex ubalalike ndi yaifupi kwambiri, ndipo index iyi ya nthawi ya redispersion ndiyonso gawo lofunikira kuti liwunike mtundu wake. Kumayambiriro kosanganikirana, ufa wa latex wayamba kale kukhudza rheology ndi ntchito ya matope.
Chifukwa cha mikhalidwe yosiyana ndi kusinthidwa kwa ufa uliwonse wogawanika wa latex, zotsatira zake zimakhalanso zosiyana, zina zimakhala ndi zotsatira zothandizira, ndipo zina zimakhala ndi zotsatira za thixotropy. Njira ya chikoka chake imachokera kuzinthu zambiri, kuphatikizapo chikoka cha latex ufa pa kuyanjana kwa madzi panthawi ya kubalalitsidwa, chikoka cha kukhuthala kosiyana kwa latex ufa pambuyo kubalalitsidwa, mphamvu ya colloid yotetezera, ndi mphamvu ya simenti ndi malamba amadzi. Zisonkhezero zimaphatikizapo kuwonjezeka kwa mpweya mumatope ndi kugawidwa kwa thovu la mpweya, komanso mphamvu ya zowonjezera zake ndi kugwirizana ndi zina zowonjezera. Choncho, kusankha makonda ndi kugawanika kwa ufa wa latex wopangidwanso ndi njira yofunikira kuti ikhudzire khalidwe la mankhwala. Mfundo yodziwika bwino ndi yakuti redispersible latex powder nthawi zambiri imawonjezera mpweya wa matope, motero imapangitsa kuti matope apangidwe, komanso kuyanjana ndi kukhuthala kwa latex ufa, makamaka colloid yoteteza, kuti madzi akabalalika. Kuwonjezeka kwa ndende kumathandizira kukonza mgwirizano wa matope omanga, potero kumapangitsa kuti matopewo azigwira ntchito bwino. Pambuyo pake, matope onyowa okhala ndi latex powder dispersion amagwiritsidwa ntchito pamalo ogwirira ntchito. Ndi kuchepa kwa madzi pamiyeso itatu - kuyamwa kwa maziko, kugwiritsa ntchito simenti ya hydration reaction, ndi kuphulika kwa madzi pamwamba pa mlengalenga, tinthu tating'onoting'ono timayandikira pang'onopang'ono, zolumikizira zimalumikizana pang'onopang'ono, ndipo pamapeto pake zimakhala. filimu ya polima yosalekeza. Izi zimachitika makamaka pores a matope ndi pamwamba pa olimba.
Tiyenera kutsindika kuti kuti njirayi ikhale yosasinthika, ndiko kuti, pamene filimu ya polima ikukumananso ndi madzi, sidzabalalitsidwanso, ndipo colloid yotetezera ya redispersible latex ufa iyenera kupatulidwa ndi filimu ya polima. Ili si vuto mu dongosolo la matope a alkaline simenti, chifukwa lidzakhala lopangidwa ndi alkali lopangidwa ndi simenti ya simenti, ndipo panthawi imodzimodziyo, kutengeka kwa zinthu ngati quartz kudzalekanitsa pang'onopang'ono ndi dongosolo, popanda chitetezo cha hydrophilicity Colloids, omwe sasungunuka m'madzi ndipo amapangidwa ndi kubalalitsidwa kamodzi kwa ufa wopangidwanso wa latex, amatha kugwira ntchito osati pouma, komanso pansi. mikhalidwe yomizidwa m'madzi kwa nthawi yayitali. Mu machitidwe osakhala amchere, monga machitidwe a gypsum kapena machitidwe omwe ali ndi fillers okha, pazifukwa zina, colloid yotetezera idakalipobe mufilimu yomaliza ya polima, yomwe imakhudza kukana kwa madzi kwa filimuyo, koma chifukwa machitidwewa sagwiritsidwa ntchito mu mlandu wa kumizidwa kwa nthawi yayitali m'madzi, ndipo polima akadali ndi zida zake zapadera zamakina, sizimakhudza kugwiritsa ntchito ufa wopangidwanso ndi latex mu machitidwe awa.
Ndi mapangidwe a filimu yomaliza ya polima, chimango chopangidwa ndi zomangira komanso zomangira organic zimapangidwira mumatope ochiritsidwa, ndiko kuti, zinthu za hydraulic zimapanga chimango chosalimba komanso cholimba, ndipo ufa wopangidwanso ndi latex umapanga filimu pakati pa kusiyana ndi. pamwamba olimba. Kulumikizana kosinthika. Kulumikizana kotereku kungaganizidwe ngati kulumikizidwa ndi mafupa olimba ndi akasupe ang'onoang'ono. Popeza mphamvu yamphamvu ya filimu ya utomoni wa polima yopangidwa ndi ufa wa latex nthawi zambiri imakhala ndi dongosolo lapamwamba kuposa la zida za hydraulic, mphamvu ya matope yokha imatha kukulitsidwa, ndiko kuti, kugwirizana kukhale bwino. Popeza kusinthasintha ndi kupunduka kwa polima ndikwambiri kuposa momwe zimakhalira zolimba monga simenti, kupunduka kwa matope kumakhala bwino, ndipo zotsatira za kupsinjika kwamwalako zimakula kwambiri, potero kumathandizira kukana kwa matope.
Nthawi yotumiza: Mar-07-2023