Nigute ushobora guhitamo hydroxypropyl methylcellulose kuri plaster?

Ubusanzwe pH agaciro k'ibicuruzwa bya gypsumu ni acide cyangwa itabogamye. Ubu hari ubwoko bubiri bwurwego rwubwubatsihydroxypropyl methylcelluloseku isoko: selile-buhoro buhoro ya selile na selile ako kanya (S). Cellulose ako kanya ntabwo ibereye sisitemu ya gypsumu. Ibicuruzwa, solubilité irakennye cyane mugihe cya acide cyangwa idafite aho ibogamiye, kandi hydroxypropyl methylcellulose ishonga buhoro irashobora gushonga mubicuruzwa bya gypsumu, ariko selile yihuta buhoro ifite ingaruka mbi, biroroshye guhuriza hamwe (mugihe gypsumu Nyuma ya minisiteri ikozwe kuri minisiteri. urukuta mugihe gito, uduce duto twa granular dukunda kugaragara hejuru). Kugeza ubu, mu bicuruzwa bya gypsumu, cyane cyane muri gypsumu yatewe imashini, birasabwa ko ether ya selile ishobora gutatana burundu kandi igashonga mu gihe gito cyane, bidusaba gukora ubushakashatsi bwimbitse kuri ether ya selile yihuta. inzira yo kubyaza umusaruro. Kuvura hejuru (ntabwo aribyo byongeweho ibindi byongeweho murwego rusanzwe rwa selile ether), kugirango uhuze na sisitemu ya gypsum. Hydroxypropyl methylcellulose ether hamwe nubuvuzi bwimbitse burashobora kugira igihe cyo gushonga gihamye hamwe nuburyo bwiza bwubukanishi muri minisiteri ya gypsum, kandi birashobora kunoza cyane uburyo bwo kuringaniza no kurangiza minisiteri.

Imashini yatewe imashini ya gypsum isanzwe ikoresha hydroxypropyl methylcellulose ether iri hagati ya 20.000 na 75.000, kandi umubare wongeyeho ni 0.2% kugeza 0.4%. Igihe cyo gushiraho imashini yatewe na gypsum mortar igenzurwa mugihe cyisaha 1. Dukoresha gypsum mortar itanga umusaruro, ubukonje bwa plastike, thixotropy, rheologiya hamwe no guhuzagurika kugirango tumenye imikorere yibicuruzwa bya gypsumu.

Twihweje kugenzura ubuziranenge bwa desulfurisiyasi ya gypsum yo kubara isoko, kuzuza (sima, igiteranyo cyiza, ifu ya calcium iremereye) hamwe nibindi bivanze (birashobora gukoreshwa mukwirakwiza ifu ya latex, hydroxypropyl methyl selulose ether, yagutse perlite, retarder gypsum) Guhitamo muri rusange ibicuruzwa biva mu mahanga.

Hydroxypropyl methyl selulose etherkuberako gypsum mortar ifite isuku nini kandi ikora neza, kandi yashimiwe cyane nabakiriya ba gypsum.