Mtondo wodziyimira pawokha ungadalire kulemera kwake kuti upange maziko athyathyathya, osalala komanso olimba pa nthaka yopangira kapena yolumikizira zipangizo zina, ndipo nthawi yomweyo ukhoza kugwira ntchito yomanga yaikulu komanso yothandiza. Chifukwa chake, kusinthasintha kwakukulu ndi gawo lofunika kwambiri pa mtondo wodziyimira pawokha. Kuphatikiza apo, uyenera kukhala ndi mphamvu yosungira madzi ndi yolumikizira, osalekanitsa madzi, komanso ukhale ndi mawonekedwe oteteza kutentha komanso kutentha kochepa.
Kawirikawiri, matope odziyimira pawokha amafunika kusinthasintha kwabwino, koma kusinthasintha kwa phala la simenti yeniyeni nthawi zambiri kumakhala 10-300px yokha; cellulose ether ndi chowonjezera chachikulu cha matope osakanikirana kale, ngakhale kuchuluka kwa zowonjezerako kuli kochepa kwambiri, kumatha kusintha kwambiri magwiridwe antchito a Mortar, kumatha kusintha kusinthasintha, magwiridwe antchito, magwiridwe antchito komanso magwiridwe antchito a matope osungira madzi. Imachita gawo lofunikira kwambiri pantchito ya matope osakanikirana kale.
1. Kuchuluka kwa madzi: Cellulose ether imakhudza kwambiri kusunga madzi, kusinthasintha komanso magwiridwe antchito a matope odziyimira pawokha. Makamaka ngati matope odziyimira pawokha, kuchuluka kwa madzi ndi chimodzi mwa zizindikiro zazikulu zowunikira momwe madzi amagwirira ntchito. Poganizira za kutsimikizira kuti matopewo ndi abwinobwino, kuchuluka kwa madzi kumatha kusinthidwa posintha kuchuluka kwa cellulose ether. Komabe, ngati kuchuluka kwake kuli kwakukulu, kuchuluka kwa madzi kwa matopewo kudzachepetsedwa, kotero kuchuluka kwa cellulose ether HPMC kuyenera kulamulidwa mkati mwa malire oyenera.
2. Kusunga Madzi: Kusunga Madzi mu Mtondo ndi chizindikiro chofunikira poyesa kukhazikika kwa zigawo zamkati za matope osakaniza simenti atsopano. Kuti akwaniritse mokwanira momwe zinthu za gel zimagwirira ntchito, kuchuluka koyenera kwa ether ya cellulose kumatha kusunga chinyezi mumtondo kwa nthawi yayitali. Kawirikawiri, kuchuluka kwa madzi omwe amasungidwa mumtondo kumawonjezeka ndi kuchuluka kwa ether ya cellulose. Mphamvu yosunga madzi ya ether ya cellulose HPMC imatha kuletsa substrate kuti isayamwe madzi ambiri mwachangu, ndikulepheretsa kutuluka kwa madzi, kuti zitsimikizire kuti malo osungira madzi amapereka madzi okwanira kuti simenti iume. Kuphatikiza apo, kukhuthala kwa ether ya cellulose kumakhudzanso kwambiri kusunga madzi mumtondo. Kukhuthala kwakukulu, kukhuthala kwa madzi kumakhudzanso bwino. Kawirikawiri, ether ya cellulose HPMC yokhala ndi kukhuthala kwa 400mpa.s imagwiritsidwa ntchito kwambiri mu matope odziyimira pawokha, zomwe zingathandize kukonza magwiridwe antchito a matope ndikuwonjezera kukhuthala kwa matope.
3. Nthawi Yokhazikitsa: Cellulose ether imakhala ndi mphamvu yochedwetsa zinthu pa matope. Pamene kuchuluka kwa zinthu mu cellulose ether kukuwonjezeka, nthawi yokhazikitsa matope imatalikira. Mphamvu yochedwetsa zinthu ya cellulose ether HPMC pa simenti imadalira kwambiri kuchuluka kwa gulu la alkyl, ndipo ili ndi ubale wochepa ndi kulemera kwake kwa mamolekyu. Mlingo wocheperako wa alkyl, kuchuluka kwa hydroxyl kumakhala kwakukulu, ndipo mphamvu yochedwetsa zinthu imawonekera kwambiri. Ndipo kuchuluka kwa zinthu mu cellulose ether, mphamvu yochedwetsa zinthu ya filimu yovuta imaonekera kwambiri pa madzi oyambira a simenti, kotero mphamvu yochedwetsa zinthu imaonekeranso kwambiri.
4. Mphamvu yopindika ndi mphamvu yopindika: Nthawi zambiri, mphamvu ndi chimodzi mwa zizindikiro zofunika kwambiri zowunikira momwe zinthu zopangidwa ndi simenti zimakhalira zophikira pa chisakanizocho. Mphamvu yopindika ndi mphamvu yopindika ya matope zimachepa ndi kuchuluka kwa ether ya cellulose HPMC.
5. Mphamvu yolumikizira: cellulose ether HPMC imakhudza kwambiri magwiridwe antchito a matope. Cellulose ether imapanga filimu ya polymer yokhala ndi mphamvu yotseka pakati pa tinthu ta simenti tomwe timasungunuka mu dongosolo la madzi, zomwe zimapangitsa kuti madzi ambiri mu filimu ya polymer atuluke kunja kwa tinthu ta simenti, zomwe zimathandiza kuti simenti isungunuke bwino, motero zimawonjezera mphamvu yolumikizira ya phala pambuyo pouma. Nthawi yomweyo, kuchuluka koyenera kwa cellulose ether kumawonjezera pulasitiki ndi kusinthasintha kwa matope, kumachepetsa kuuma kwa malo osinthira pakati pa matope ndi mawonekedwe a substrate, ndikuchepetsa kuthekera kotsetsereka pakati pa ma interfaces. Pamlingo wina, mphamvu yolumikizira pakati pa matope ndi substrate imakulitsidwa. Kuphatikiza apo, chifukwa cha kukhalapo kwa cellulose ether mu phala la simenti, malo apadera osinthira mawonekedwe ndi mawonekedwe amapangidwa pakati pa tinthu ta simenti ndi chinthu chosinthira. Malo olumikizira awa amapangitsa malo osinthira mawonekedwe kukhala osinthasintha komanso osalimba, kotero kuti matopewo akhale ndi mphamvu yolimba yolumikizira.
Nthawi yotumizira: Feb-27-2023