Kugwiritsa Ntchito Ufa wa Polima Wosasinthika mu Dongosolo la Mtondo

Ufa wa polima wosanganizika ndi zinthu zina zosapangidwa (monga simenti, laimu wosweka, gypsum, ndi zina zotero) ndi zinthu zosiyanasiyana zosakaniza, zodzaza ndi zina zowonjezera (monga methyl hydroxypropyl cellulose ether, starch ether, lignocellulose, hydrophobic Agents, ndi zina zotero) zimasakanizidwa kuti zipange matope osakanikirana. Madzi osakanikirana akasakanikirana ndi madzi, pogwiritsa ntchito hydrophilic protective colloid ndi mechanical shearing, tinthu ta latex powder timafalikira m'madzi.

Chifukwa cha makhalidwe osiyanasiyana ndi kusintha kwa ufa uliwonse wa latex wogawanika, izi ndizosiyana, zina zimakhala ndi mphamvu yolimbikitsa kuyenda kwa madzi, pomwe zina zimakhala ndi mphamvu yowonjezera thixotropy. Kagwiridwe kake ka mphamvu kamachokera ku mbali zambiri, kuphatikizapo mphamvu ya ufa wa latex pa mphamvu ya madzi panthawi yofalikira, mphamvu ya kukhuthala kosiyanasiyana kwa ufa wa latex pambuyo pofalikira, mphamvu ya colloid yoteteza, ndi mphamvu ya simenti ndi lamba wamadzi. Mphamvu ya zinthu zotsatirazi ikuphatikizapo mphamvu ya kuwonjezeka kwa mpweya wa matope ndi kufalikira kwa thovu la mpweya, komanso mphamvu ya zowonjezera zake komanso kuyanjana ndi zowonjezera zina. Chifukwa chake, kusankha kosinthidwa ndi kugawidwa kwa ufa wa polymer wosungunuka ndi njira yofunika kwambiri yokhudzira ubwino wa malonda. Pakati pawo, lingaliro lodziwika bwino ndilakuti ufa wa polymer wosungunuka nthawi zambiri umawonjezera mphamvu ya mpweya wa matope, motero umapaka mafuta omanga matope, komanso mphamvu ya ufa wa polymer, makamaka pamene colloid yoteteza imwazikana, kupita ku madzi. Kuwonjezeka kwa α kumathandiza kuti matope omangira agwirizane bwino, motero kungathandize kuti matopewo azigwira ntchito bwino. Pambuyo pake, matope onyowa okhala ndi ufa wa latex ufa amaikidwa pamalo ogwirira ntchito. Ndi kuchepa kwa chinyezi pamlingo wa magawo atatu - kuyamwa kwa maziko, kugwiritsa ntchito simenti hydration reaction, komanso kusinthasintha kwa chinyezi pamwamba pa mlengalenga, tinthu ta resin timayandikira pang'onopang'ono , mawonekedwewo amalumikizana pang'onopang'ono, ndipo pamapeto pake amakhala filimu yopitilira ya polima. Njirayi imachitika makamaka m'mabowo a matope ndi pamwamba pa cholimba.

Tiyenera kutsindika kuti, kuti njirayi isasinthe, kutanthauza kuti, pamene filimu ya polima siidzasungunukanso ikakumana ndi madzi kachiwiri, colloid yoteteza ya ufa wa polima wosungunuka iyenera kulekanitsidwa ndi dongosolo la filimu ya polima. Izi si vuto mu dongosolo la matope a simenti ya alkaline, chifukwa idzasinthidwa ndi alkali yopangidwa ndi madzi a simenti, ndipo nthawi yomweyo, kuyamwa kwa zinthu za quartz kudzaisiyanitsa pang'onopang'ono ndi dongosolo popanda chitetezo cha hydrophilic. Colloid, filimu yosasungunuka m'madzi ndipo imapangidwa ndi kufalikira kwa ufa wa latex wosungunuka kamodzi kokha, imatha kugwira ntchito osati kokha m'mikhalidwe youma, komanso m'mikhalidwe yomizidwa m'madzi kwa nthawi yayitali. Mu machitidwe osakhala a alkaline, monga machitidwe a gypsum kapena machitidwe okhala ndi zodzaza zokha, ma colloid oteteza amakhalabe pang'ono mu filimu yomaliza ya polymer pazifukwa zina, zomwe zimakhudza kukana kwa madzi kwa filimuyo, koma popeza machitidwe awa sagwiritsidwa ntchito Pankhani yomizidwa m'madzi kwa nthawi yayitali, ndipo polima ikadali ndi mawonekedwe ake apadera amakina, sizimakhudza kugwiritsa ntchito ufa wa polymer wosakanikirana m'makina awa.