I-viscosity ephezulu ye-cellulose ether ingathuthukisa ukusebenza kokugcinwa kwamanzi kodaka lwe-gypsum?

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 okuningi 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, izindaba zokwakha ze-gypsum ezisetshenziselwa ukwakhiwa kodonga zilungiselelwe ngokungeza amanzi odongeni, futhi amanzi adonswa kalula ngodonga, okuholela ekuntulekeni kwamanzi adingekayo e-jppsum, okuphumela ebunzimeni bokwakhiwa nokuncishiswa Amandla e-Bond, okuholela ekuqhekekeni, izinkinga zekhwalithi ezinjengokuhlobisa nokukhonkotha. 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. Njengoba i-gypsum ixubene ne-retarder, evimbela inqubo ye-hydration ye-hemihydrate gypsum. Lolu hlobo lwe-gypsum slurry ludinga ukugcinwa odongeni lwe-1 ~ 2h ngaphambi kokuba lihle. Iningi lezindonga linezindawo zokutholwa kwamanzi, ikakhulukazi izindonga zezitini nokhonkolo olwenziwe. Udonga, ibhodi lokufakwa kwe-porous nezinye izinto zodonga olusha olusha, ngakho-ke ukwelashwa kokugcinwa kwamanzi kufanele kwenziwe ku-gypsum slurry ukugwema ukudluliswa kwengxenye yamanzi ku-Slurry odongeni, okuholela ekushodani kwamanzi nasekupheleni kwe-hypsum lapho i-gypsum I-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 agciniwe asetshenziswa amanzi asetshenziswa izitha ze-cellulose, njenge-methylslose (MC), i-hpmpypropyl methyl cellulose (hpmc), i-hpdroxypyll methyl celtule i-powder, njll. Ingasetshenziswa futhi ukuthuthukisa ukusebenza kokugcinwa kwamanzi.

Akunandaba noma luhlobo luni lwe-ejenti yokugcina amanzi lungabambezela izinga le-hypsum kuma-degree ahlukahlukene, lapho umthamo walowo mkhosi uhlala ungashintshiwe, umenzeli wokugcina amanzi ngokuvamile angabuyisa ukumiswa kwemizuzu engu-15-30. Ngakho-ke, inani le-retardder lingancishiswa ngokufanele.