Mtondo wodziyimira pawokha ukhoza kudalira kulemera kwake kuti upange maziko athyathyathya, osalala komanso olimba pagawo laling'ono poyala kapena kumangirira zida zina. Panthawi imodzimodziyo, imatha kupanga zomangamanga zazikulu komanso zogwira mtima. Choncho, madzi amadzimadzi kwambiri ndi gawo lofunika kwambiri la matope odzipangira okha Kuwonjezera apo, ayenera kukhala ndi madzi ena osungira madzi ndi mphamvu zomangirira, palibe chodabwitsa cha tsankho la madzi, komanso kukhala ndi zizindikiro za kutentha kwa kutentha ndi kutentha kochepa.
Nthawi zambiri, matope odzipangira okha amafunikira madzi abwino, koma kusungunuka kwa phala lenileni la simenti nthawi zambiri kumakhala 10-12cm; mwama cellulose ethers, hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chachikulu cha matope okonzeka okonzeka, ngakhale kuti ndalama zowonjezera zimakhala zochepa kwambiri, zimatha kusintha kwambiri ntchito ya matope, zimatha kupititsa patsogolo kusasinthasintha, kugwira ntchito, kugwirizanitsa ntchito komanso kusunga madzi a matope. Zimagwira ntchito yofunika kwambiri m'munda wamatope okonzeka osakaniza.
1. Kuyenda
Hydroxypropyl methylcellulose (HPMC)ali ndi chikoka chachikulu pa kusunga madzi, kusasinthasintha ndi kamangidwe ka matope okha-leveling. Makamaka ngati matope odzipangira okha, fluidity ndi chimodzi mwa zizindikiro zazikulu zowunikira ntchito yodzikweza. Pansi pa mfundo kuonetsetsa zikuchokera yachibadwa matope, fluidity wa matope akhoza kusintha ndi kusintha kuchuluka kwa HPMC. Komabe, ngati mlingo uli wochuluka kwambiri, madzi amadzimadzi amadzimadzi adzachepetsedwa, choncho mlingo wa HPMC uyenera kuyendetsedwa mkati mwazokwanira.
2. Kusunga madzi
Kusungidwa kwamadzi kwa matope ndi chizindikiro chofunikira choyezera kukhazikika kwa zigawo zamkati zamatope osakanikirana a simenti. Kuti mukwaniritse bwino momwe ma hydration amachitira ndi zinthu za gel, kuchuluka kokwanira kwa HPMC kumatha kusunga chinyezi mumatope kwa nthawi yayitali. Nthawi zambiri, kuchuluka kwa kusunga madzi kwa slurry kumawonjezeka ndikuwonjezeka kwa HPMC. Ntchito yosungiramo madzi ya HPMC ingalepheretse gawo lapansi kuti lisatenge madzi ochulukirapo mwachangu, ndikulepheretsa kutuluka kwa madzi, kuti zitsimikizire kuti malo okhala ndi slurry amapereka madzi okwanira a simenti. Kuphatikiza apo, kukhuthala kwa hydroxypropyl methylcellulose kumathandizanso kwambiri pakusungidwa kwamadzi mumatope. Kuchuluka kwa mamasukidwe amphamvu, kumapangitsa kuti madzi asungidwe bwino. Nthawi zambiri, zinthu zokhala ndi mamasukidwe amphamvu pafupifupi 400mpa.s zimagwiritsidwa ntchito ngati matope odziyimira pawokha, omwe amatha kuwongolera magwiridwe antchito amatope ndikuwonjezera kulimba kwa matope.
3. Kukhazikitsa nthawi
HPMC imakhala ndi vuto linalake pamatope. Ndi kuwonjezeka kwa mlingo, nthawi yoyika matope imatalika. Kuchedwetsa kwa HPMC pa phala la simenti makamaka kumadalira kuchuluka kwa magulu a alkili, ndipo alibe ubale wochepa ndi kulemera kwake kwa maselo. Kuchepa kwa kuchuluka kwa alkyl m'malo, kumapangitsa kuti hydroxyl ichuluke, komanso kuchedwetsa kowonekera. Ndipo kukweza kwa HPMC kumapangitsa kuti mawonekedwe a filimu yovuta kwambiri ayambe kuchepa kwa simenti, kotero kuti kuchepetsako kumawonekeranso.
4. Flexural mphamvu ndi compressive mphamvu
Nthawi zambiri, mphamvu ndi imodzi mwazofunikira zowunikira pakuchiritsa kwa zida za simenti zopangidwa ndi simenti pazosakaniza. Mphamvu yopondereza komanso mphamvu yosunthika yamatope idzachepa ndi kuchuluka kwa zomwe zili mu HPMC.
5. Mphamvu ya mgwirizano
HPMC ili ndi chikoka chachikulu pakugwira ntchito kwamatope.Mtengo wa HPMCamapanga filimu polima ndi kusindikiza zotsatira pakati pa madzi gawo dongosolo ndi simenti hydration particles, amene amalimbikitsa madzi ambiri mu polima filimu kunja particles simenti, amene amathandiza kuti wathunthu hydration wa simenti, motero kuwongolera slurry khalidwe. Mphamvu yolimba ya mgwirizano. Panthawi imodzimodziyo, kuwonjezera kuchuluka koyenera kwa HPMC kumawonjezera pulasitiki ndi kusinthasintha kwa matope, kumachepetsa kusasunthika kwa malo osinthika pakati pa matope ndi mawonekedwe a gawo lapansi, ndi kuchepetsa kutsetsereka kwa mphamvu pakati pa mawonekedwe. Pamlingo wina, mgwirizano pakati pa matope ndi gawo lapansi umakulitsidwa. Komanso, chifukwa cha kukhalapo kwa HPMC mu phala simenti, wapadera mawonekedwe kusintha zone ndi mawonekedwe wosanjikiza aumbike pakati pa matope particles ndi hydration mankhwala. Izi mawonekedwe wosanjikiza zimapangitsa mawonekedwe kusintha zone kusinthasintha ndi zochepa okhwima. Chifukwa chake, Mortar ali ndi mphamvu yolumikizana mwamphamvu.
Nthawi yotumiza: Apr-25-2024