Umphumela wokuvunyelwa kwe-cellulose ether kwizakhiwo ze-gypsum mota

I-Viscosity iyipharamitha ebalulekile yokusebenza kwe-cellulose ether.

Ngokuvamile, okuphezulu kwe-viscosity, kungcono umphumela wokugcina amanzi we-gypsum udaka. Kodwa-ke, ukukhuphuka kwesisindo esiphakeme, isisindo samangqamuzana e-cellulose ether, kanye nokuncipha okuhambisanayo kwe-solubelity yayo kuzoba nomthelela ongemuhle emandleni nasekusebenzeni komuzi wodaka. Lapho kuphakama i-viscosity, kusobala kakhulu umphumela wokuqina kudaka, kepha akayona ngokuqondile.

Lapho esekhuphuka khona ukubonwa, okuzoba khona ngodaka olumanzi. Ngesikhathi sokwakha, kubonakaliswa njengokunamathela ku-scraper kanye nokunamathela okuphezulu kuya engxenyeni engezansi. Kepha akusizi ukwandisa amandla wesakhiwo sodaka olumanzi uqobo. Ngaphezu kwalokho, ngesikhathi sokwakha, ukusebenza kwe-anti-sag ngodaka olumanzi akubonakali. Ngokuphambene nalokho, ukubonakala okuphakathi nendawo okuphansi kepha okulungiselelwe i-methyl cellulose kanye nokusebenza okuhle kakhulu ekuthuthukiseni amandla wesakhiwo sodaka lwamanzi.

Ukwakha izinsiza zodonga kakhulu izinhlaka ze-porous, futhi bonke banomunwe oqinile wamanzi. Kodwa-ke, izinto zokwakha ze-gypsum ezisetshenziselwa ukwakhiwa kodonga zilungiselelwe ngokungeza amanzi odongeni, futhi amanzi adonswa kalula ngodonga, okuholela ekunciphiseni kokwakhiwa kwe-jppsum, okuholela ekuqhekekeni kwamandla, okuholela ekuqhekekeni kwamandla, okuholela. Ukwenza ngcono ukugcinwa kwamanzi kwezinto zokwakha ze-gypsum kungathuthukisa ikhwalithi yokwakha namandla abopha ngodonga. Ngakho-ke, i-ejenti yokugcina amanzi isibe ngenye ye-admixtures ebalulekile yezinto zokwakha ze-gypsum.

I-gypsum elungisayo, i-gypsum ehlanganisiwe, i-caulking gypsum, i-gypsum putty nezinye izinto zokwakha zokwakha ziyasetshenziswa. Ukuze kusizakale ukwakhiwa, ama-gypsum retarders angezwa ngesikhathi sokukhiqiza ukuze andise isikhathi sokwakha se-gypsum slurry. Ngoba i-gypsum ixubene ne-retarder, evimbela inqubo ye-hydration ye-hemihydrate gypsum. Lolu hlobo lwe-gypsum slurry ludinga ukugcinwa odongeni amahora angu-1 kuye kwangama-2 ngaphambi kokusetha. Iningi lezindonga linezindawo zokutholwa kwamanzi, ikakhulukazi izindonga zezitini nokhonkolo olwenziwe. Udonga, ibhodi yokufakwa kwe-POROS nezinye izinto zodonga olusha olungasindi, ngakho-ke ukwelashwa kokugcinwa kwamanzi kufanele kwenziwe ku-gypsum slurry ukugwema ukudluliswa kwengxenye yamanzi ku-Wlurry odongeni, okuholela ekutheni i-hydration yamanzi kanye ne-gypsum slurry ilukhuni. Dala ukwahlukana nokukhonkotha kokuhlanganiswa phakathi kwe-gypsum ne-wall ebusweni. Ukungezwa kwe-ejenti yokugcina amanzi kuwukugcina umswakama oqukethwe ku-gypsum slurry, ukuqinisekisa ukusabela kwe-hydration kwe-gypsum slurry esibonakalayo, ukuze kuqinisekiswe amandla okubopha. Ama-ejenti ajwayelekile asetshenziswa ngamanzi asetshenziswayo ama-cellulose afences, njenge: Methyl cellulose (MC), i-hpmpypropyl methyl celtule (hpmc), i-hpdroxypyll methyllulose (i-hpmc), i-polyvinylyl methy, njll.


Isikhathi sePosi: Feb-28-2023