Mtondo wodziyimira pawokha ukhoza kudalira kulemera kwake kuti upange maziko athyathyathya, osalala komanso amphamvu pagawo laling'ono la kuika kapena kugwirizanitsa zipangizo zina, ndipo panthawi imodzimodziyo akhoza kupanga zomangamanga zazikulu komanso zogwira mtima. Chifukwa chake, kuchuluka kwamadzimadzi ndi gawo lofunikira kwambiri pamadzi odziyimira pawokha. Kuonjezera apo, iyenera kukhala ndi kusungirako madzi ndi mphamvu zomangirira, palibe chodabwitsa cha tsankho la madzi, komanso kukhala ndi zizindikiro za kutentha kwa kutentha ndi kukwera kwa kutentha.
Nthawi zambiri, matope odzipangira okha amafunikira madzi abwino, koma kusungunuka kwa phala lenileni la simenti nthawi zambiri kumakhala 10-300px; cellulose ether ndi chowonjezera chachikulu cha matope osakaniza okonzeka, ngakhale kuti ndalama zowonjezera zimakhala zochepa kwambiri, zimatha kusintha kwambiri ntchito ya Mortar, zimatha kusintha kusasinthasintha, kugwira ntchito, kugwira ntchito, kugwirizanitsa ntchito ndi kusunga madzi a matope. Zimagwira ntchito yofunika kwambiri m'munda wamatope okonzeka osakaniza.
1. Kusungunuka: Ma cellulose ether ali ndi chikoka chofunikira pakusunga madzi, kusasinthika ndi kapangidwe ka matope odzipangira okha. Makamaka ngati matope odzipangira okha, fluidity ndi chimodzi mwa zizindikiro zazikulu zowunikira ntchito yodzikweza. Pansi pa malo owonetsetsa kuti matope apangidwe bwino, madzi amadzimadzi amatha kusinthidwa mwa kusintha kuchuluka kwa cellulose ether. Komabe, ngati ndalamazo ndi zochuluka kwambiri, fluidity ya matope adzachepetsedwa, kotero kuchuluka kwa mapadi ether HPMC ayenera kulamulidwa mkati osiyanasiyana wololera.
2. Kusungirako madzi: Kusungidwa kwa madzi kwa matope ndi chizindikiro chofunikira choyezera kukhazikika kwa zigawo zamkati za matope osakanikirana a simenti. Kuti mukwaniritse bwino momwe ma hydration amachitira ndi zinthu za gel, kuchuluka kwa cellulose ether kumatha kusunga chinyezi mumatope kwa nthawi yayitali. Nthawi zambiri, kusungidwa kwa madzi kwa slurry kumawonjezeka ndi kuchuluka kwa cellulose ether. Mphamvu yosungiramo madzi ya cellulose ether HPMC ingalepheretse gawo lapansi kuti lisatenge madzi ochulukirapo mwachangu, ndikulepheretsa kutuluka kwa madzi, kuti zitsimikizire kuti chilengedwe cha slurry chimapereka madzi okwanira a simenti. Kuphatikiza apo, kukhuthala kwa cellulose ether kumathandizanso kwambiri kusungidwa kwamadzi kwamatope. Kuchuluka kwa mamasukidwe amphamvu, kumapangitsa kuti madzi asungidwe bwino. Nthawi zambiri, mapadi etha HPMC ndi mamasukidwe akayendedwe a 400mpa.s makamaka ntchito kudziona mlingo matope matope, amene angathe kusintha kusanja ntchito ya matope ndi kuonjezera compactness wa matope.
3. Kukhazikitsa nthawi: Ma cellulose ether ali ndi vuto linalake lochepetsa matope. Ndi kuchuluka kwa zomwe zili mu cellulose ether, nthawi yoyika matope imatalika. Kuchepetsa mphamvu ya cellulose etha HPMC pa phala la simenti makamaka zimadalira kuchuluka kwa m'malo mwa gulu la alkili, ndipo ili ndi ubale wochepa ndi kulemera kwake kwa maselo. Kuchepa kwa kuchuluka kwa alkyl m'malo, kumapangitsa kuti hydroxyl ichuluke, komanso kuchedwetsa kowonekera. Ndipo zomwe zili mu cellulose ether, ndizodziwikiratu kwambiri kuchedwa kwa filimu yovuta kwambiri pa hydration yoyambirira ya simenti, kotero kuti kuchepetsako kumawonekeranso.
4. Mphamvu ya Flexural ndi mphamvu yopondereza: Nthawi zambiri, mphamvu ndi imodzi mwazofunikira zowunikira pakuchiritsa kwa zida za simenti zopangira simenti pazosakaniza. Mphamvu yopondereza ndi mphamvu yosunthika yamatope idzachepa ndi kuchuluka kwa cellulose ether HPMC.
5. Mphamvu yolumikizana: mapadi etha HPMC ali ndi chikoka chachikulu pakugwira ntchito kwamatope. Ma cellulose ether amapanga filimu ya polima yokhala ndi kusindikiza pakati pa simenti ya hydration particles mu dongosolo lamadzimadzi, lomwe limalimbikitsa madzi ambiri mu filimu ya polima kunja kwa tinthu tating'onoting'ono ta simenti, zomwe zimathandiza kuti hydration yonse ya simenti ikhale yabwino, motero kuwongolera mphamvu ya mgwirizano wa phala pambuyo pouma. Pa nthawi yomweyi, kuchuluka koyenera kwa cellulose ether kumawonjezera pulasitiki ndi kusinthasintha kwa matope, kumachepetsa kusasunthika kwa malo osinthika pakati pa matope ndi mawonekedwe a gawo lapansi, ndipo kumachepetsa kutsetsereka kwa mphamvu pakati pa mawonekedwe. Pamlingo wina, mgwirizano pakati pa matope ndi gawo lapansi umakulitsidwa. Komanso, chifukwa cha kukhalapo kwa mapadi etere mu phala simenti, wapadera mawonekedwe kusintha zone ndi mawonekedwe wosanjikiza aumbike pakati pa matope particles ndi mankhwala hydration. Izi mawonekedwe wosanjikiza zimapangitsa mawonekedwe kusintha zone kusinthasintha ndi zochepa okhwima, kotero , kotero kuti matope ali amphamvu chomangira mphamvu.
Nthawi yotumiza: Feb-27-2023