Mukugadzirwa kwezvinhu zvekuvaka, kunyanya poda yakaoma dhaka,cellulose etherinoita basa rinokosha, kunyanya mukugadzirwa kwedhaka rinokosha (modified mortar), chinhu chinokosha. Basa rakakosha remvura-soluble cellulose ether mudhaka rinonyanya kugona kwayo kuchengetedza mvura. Kuchengetedzwa kwemvura kweselulosi ether kunoenderana nekutorwa kwemvura kwegadziko layer, kuumbwa kwedhaka, ukobvu hwedhaka redhaka, kudiwa kwemvura kwedhaka, uye nguva yekumisikidzwa kwechinhu chekugadzika.
Mazhinji masonry uye plastering madhaka haabate mvura zvakanaka, uye mvura uye slurry zvichaparadzana mushure memaminitsi mashoma ekumira. Kuchengetwa kwemvura ibasa rakakosha remethyl cellulose ether, uye zvakare kuita kunoita kuti vazhinji vedzimba vanogadzira dhaka vanogadzira dhaka, kunyanya avo vari kumatunhu ekumaodzanyemba ane tembiricha yakanyanya, vanoteerera. Zvinhu zvinokanganisa kuchengetedza kwemvura kweiyo yakaoma poda dhaka zvinosanganisira huwandu hwekuwedzera, viscosity, kutsetseka kwezvikamu, uye tembiricha yenzvimbo yekushandisa.
Kuchengetwa kwemvura kwecellulose etherpachayo inobva mukunyungudika uye kupera simba kweselulosi ether pachayo. Sezvo isu tose tinoziva, kunyange zvazvo cellulose molecular chain ine nhamba yakawanda yeakanyanya hydratable OH mapoka, haisi kunyunguduka mumvura, nokuti chimiro che cellulose chine hukuru hwekristallinity. Kugona kwe hydration kwemapoka ehydroxyl chete hakuna kukwana kuvhara mabhondi akasimba ehydrogen uye van der Waals masimba pakati pemamorekuru. Naizvozvo, inongozvimba asi hainyungudika mumvura. Kana chinotsiva chinopinzwa mucheni yemamorekuru, kwete chete chinotsiva chinoparadza cheni yehydrogen, asiwo iyo interchain hydrogen bond inoparadzwa nekuda kwekuroora kweiyo inotsiva pakati pemaketani ari padyo. Iyo yakakura inotsiva, yakakura chinhambwe pakati pemamorekuru. Iyo yakakura chinhambwe. Iyo yakakura mhedzisiro yekuparadza hydrogen zvisungo, iyo cellulose ether inonyungudika mumvura mushure mekunge cellulose lattice ichiwedzera uye mhinduro inopinda, ichigadzira yakakwirira-viscosity mhinduro. Kana kutonhora kuchikwira, hydration yepolymer inopera, uye mvura pakati pemaketani inodzingwa kunze. Kana iyo dehydration effect yakakwana, mamorekuru anotanga kuungana, achigadzira matatu-dimensional network dhizaini gel uye akapetwa kunze.
Kazhinji kutaura, iyo yakakwirira viscosity, zviri nani kuchengetedza mvura. Zvisinei, iyo yakakwirira ye viscosity uye yakakwirira yehuremu hwema molecular, kuderera kunowirirana mukunyungudika kwayo kuchava nemigumisiro yakaipa pakusimba uye kushanda kwekuvaka kwedhaka. Iyo yakakwirira viscosity, iyo inonyanya kuoneka iyo thickening maitiro padhaka, asi haina kuenzana zvakananga. Iyo yakakwirira iyo viscosity, iyo yakanyanya viscous dhaka rakanyorova richava, ndiko kuti, panguva yekuvaka, inoratidzirwa sekunamatira kune scraper uye yakakwirira kunamatira kune substrate. Asi hazvibatsiri kuwedzera simba rekuumbwa kwevhu rakanyorova pacharo. Panguva yekuvaka, iyo anti-sag performance haisi pachena. Pane zvinopesana, imwe yepakati uye yakaderera viscosity asi yakagadziridzwa methylcellulose etherskuve nekuita kwakanakisa mukuvandudza simba rechimiro chedhaka rakanyorova.
Nguva yekutumira: Kubvumbi-25-2024