Kukhuthala kwakukulu kwa efa ya cellulose kungathandize kuti matope a gypsum asungidwe bwino?

Kukhuthala ndi chizindikiro chofunikira cha magwiridwe antchito a ether ya cellulose.

Kawirikawiri, kukhuthala kwa matope a gypsum kukakhala kwakukulu, kumakhala bwino kusunga madzi m'matope a gypsum. Komabe, kukhuthala kwa matope a cellulose ether kumakhala kwakukulu, ndipo kuchepa kwa kusungunuka kwake kudzakhala ndi zotsatira zoyipa pa mphamvu ndi kapangidwe ka matope. Kukhuthala kwa matope kukakhala kwakukulu, kukhuthala kwa matopewo kumaonekera bwino, koma sikufanana mwachindunji.

Kukhuthala kwakukulu, matope onyowa amakhala olimba kwambiri. Pakumanga, amaonekera ngati akumamatira ku chotsukira ndi kumamatira kwambiri ku substrate. Koma sizithandiza kwambiri kuwonjezera mphamvu ya kapangidwe ka matope onyowa. Kuphatikiza apo, pakupanga, mphamvu yoletsa kutsika kwa matope onyowa siionekera bwino. M'malo mwake, ma ether ena apakatikati ndi otsika koma osinthidwa a methyl cellulose ali ndi magwiridwe antchito abwino kwambiri pakukweza mphamvu ya kapangidwe ka matope onyowa.

Zipangizo zomangira khoma nthawi zambiri zimakhala ndi mabowo, ndipo zonse zimakhala ndi madzi ambiri. Komabe, zipangizo zomangira za gypsum zomwe zimagwiritsidwa ntchito pomanga khoma zimakonzedwa powonjezera madzi kukhoma, ndipo madziwo amalowa mosavuta kukhoma, zomwe zimapangitsa kuti gypsum isaume bwino, zomwe zimapangitsa kuti pakhale zovuta pakumanga pulasitala komanso mphamvu yochepa yomangira, zomwe zimapangitsa kuti pakhale ming'alu, mavuto monga kukumba mabowo ndi kung'ambika. Kukonza kusunga madzi kwa zipangizo zomangira za gypsum kungathandize kuti pakhale bwino ntchito yomanga komanso mphamvu yomangira khoma. Chifukwa chake, chosungira madzi chakhala chimodzi mwa zinthu zofunika kwambiri zomangira zipangizo zomangira za gypsum.

Kupaka gypsum, gypsum yolumikizidwa, gypsum yophimba, gypsum putty ndi zinthu zina zopangira ufa zimagwiritsidwa ntchito. Pofuna kupangitsa kuti ntchito yomanga ikhale yosavuta, ma retarder a gypsum amawonjezedwa panthawi yopangira kuti nthawi yomanga gypsum slurry ichepe. Popeza gypsum imasakanizidwa ndi Retarder, zomwe zimaletsa njira yothira madzi ya hemihydrate gypsum. Mtundu uwu wa gypsum slurry uyenera kusungidwa pakhoma kwa 1 ~ 2H isanalowe. Makoma ambiri ali ndi mphamvu zoyamwa madzi, makamaka makoma a njerwa ndi konkire yolowa mpweya. Khoma, bolodi loteteza madzi lokhala ndi porous ndi zipangizo zina zatsopano zopepuka za khoma, kotero chithandizo chosunga madzi chiyenera kuchitika pa gypsum slurry kuti tipewe kusamutsa gawo la madzi mu slurry kupita kukhoma, zomwe zimapangitsa kuti madzi asamayende bwino komanso kuti madzi asalowe bwino pamene gypsum slurry yauma. Zimayambitsa kulekanitsidwa ndi kusweka kwa cholumikizira pakati pa gypsum ndi khoma. Kuwonjezera kwa chosungira madzi ndiko kusunga chinyezi chomwe chili mu gypsum slurry, kuti zitsimikizire kuti gypsum slurry ikuyenda bwino pamalo olumikizirana, kuti zitsimikizire kuti mphamvu yolumikizirana ikuyenda bwino. Zinthu zosungira madzi zomwe zimagwiritsidwa ntchito kwambiri ndi ma ether a cellulose, monga methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), ndi zina zotero. Kuphatikiza apo, polyvinyl alcohol, sodium alginate, modified starch, diatomaceous earth, rare earth powder, ndi zina zotero zingagwiritsidwenso ntchito kupititsa patsogolo magwiridwe antchito osungira madzi.

Kaya ndi mtundu wanji wa chinthu chosungira madzi chomwe chingachedwetse kuchuluka kwa madzi mu gypsum mpaka madigiri osiyanasiyana, ngati mlingo wa chinthu chosungira madzi sunasinthe, chinthu chosungira madzi nthawi zambiri chimatha kuchedwetsa kukhazikika kwa mphindi 15-30. Chifukwa chake, kuchuluka kwa chinthu chosungira madzi kumatha kuchepetsedwa moyenera.