Ukwakhiwa ngemishini kodaka lokuplasta kube nenqubekelaphambili eminyakeni yamuva.Udaka lokunamathisela seluthuthukile kusukela endaweni yendabuko yokuzixuba kuya odakeni olujwayelekile lwengxube eyomile kanye nodaka lwengxube emanzi.Ukusebenza kwawo okuphezulu nokuzinza yizici ezibalulekile zokukhuthaza ukuthuthukiswa kokuplasta ngemishini, futhi i-cellulose ether isetshenziswa njengodaka lokuplasta Isengezo esiwumgogodla sinendima engenakushintshwa.Kulesi sivivinyo, ngokulungisa i-viscosity nokugcinwa kwamanzi kwe-cellulose ether, futhi ngokuguqulwa kokwenziwa, imiphumela yezinkomba zokuhlola ezifana nenani lokugcinwa kwamanzi, ukulahlekelwa okungaguquguquki okungu-2h, isikhathi esivulekile, ukumelana ne-sag, kanye noketshezi lokunamathisela udaka ekwakhiweni kwemishini kwaba. wafunda.Ekugcineni, kwatholakala ukuthi i-cellulose ether inezici zezinga eliphezulu lokugcinwa kwamanzi kanye nempahla yokugoqa enhle, futhi ifaneleka ngokukhethekile ukwakhiwa kwemishini yodaka lokukhonkoloza, futhi zonke izinkomba zodaka lokunamathisela zihlangabezana nezindinganiso zikazwelonke.
Izinga lokugcinwa kwamanzi kodaka lokuplasta
Izinga lokugcinwa kwamanzi odaka lokuplasta liwumkhuba okhulayo lapho i-viscosity ye-cellulose ether isuka ku-50,000 kuya ku-100,000, futhi kuwumkhuba oyanciphayo uma isuka ku-100,000 kuya ku-200,000, kuyilapho izinga lokugcinwa kwamanzi e-cellulose ether yokufafaza ngomshini selifinyelele. ngaphezu kwama-93%.Uma izinga lokugcinwa kwamanzi liphezulu kudaka, mancane amathuba okuthi udaka luyopha.Ngesikhathi sokuhlolwa kokufafaza ngomshini wokufafaza udaka, kwatholakala ukuthi lapho izinga lokugcinwa kwamanzi e-cellulose ether lingaphansi kuka-92%, udaka luvame ukopha ngemva kokubekwa isikhathi esithile, futhi, ekuqaleni kokufafaza. , kulula ikakhulukazi ukuvimba ipayipi.Ngakho-ke, lapho silungiselela udaka lokuplasta olulungele ukwakhiwa kwemishini, kufanele sikhethe i-cellulose ether enezinga eliphezulu lokugcinwa kwamanzi.
Ukunamathisela udaka 2h ukulahlekelwa ukungaguquguquki
Ngokwezidingo ze-GB/T25181-2010 “I-Ready Mixed Mortar”, imfuneko yokulahlekelwa ukungaguquguquki kwamahora amabili yodaka olujwayelekile lokuplasta lungaphansi kwama-30%.I-viscosity ye-50,000, 100,000, 150,000, kanye ne-200,000 isetshenziselwe ukuhlolwa kokulahlekelwa okungaguquki kwe-2h.Kungabonakala ukuthi njengoba i-viscosity ye-cellulose ether ikhula, inani le-2h lokungaguquguquki kokulahlekelwa kwe-mortar lizokwehla kancane kancane, futhi libonisa ukuthi i-viscosity ye-cellulose ether I-value ephakeme, ngcono ukuzinza kokuvumelana kodaka futhi kungcono ukusebenza kwe-anti-delamination of the mortar.Kodwa-ke, ngesikhathi sokufafaza kwangempela, kwatholakala ukuthi ngesikhathi sokwelashwa kokulinganisa kamuva, ngenxa yokuthi i-viscosity ye-cellulose ether iphezulu kakhulu, ukuhlangana phakathi kodaka kanye ne-trowel kuyoba kukhulu, okungahambisani nokwakhiwa.Ngakho-ke, esimweni sokuqinisekisa ukuthi udaka aluhlali futhi alunciphisi, i-viscosity value ephansi ye-cellulose ether, ingcono.
Amahora okuvula udaka lokunamathisela
Ngemuva kokuthi udaka lokunamathisela lufafazwe odongeni, ngenxa yokumuncwa kwamanzi kwe-substrate yodonga kanye nokuhwamuka komswakama endaweni yodaka, udaka luzokwakha amandla athile ngesikhathi esifushane, okuzothinta ukwakhiwa kokulinganisa okulandelayo. .Isikhathi sokuvala sihlaziywe.Ivelu ye-viscosity ye-cellulose ether iku-100,000 kuya ku-200,000, isikhathi sokusetha asishintshi kakhulu, futhi sinokuhlobana okuthile nezinga lokugcinwa kwamanzi, okusho ukuthi, ukuphakama kwezinga lokugcinwa kwamanzi, isikhathi eside. isikhathi sokumisa udaka.
Uketshezi lodaka lokuplasta
Ukulahleka kwemishini yokufafaza kuhlobene kakhulu nokumanzi kodaka lokuplasta.Ngaphansi kwesilinganiso esifanayo samanzi-material, ukuphakama kwe-viscosity ye-cellulose ether, kunciphisa inani le-fluidity lodaka., okusho ukuthi ukuphakama kwe-viscosity ye-cellulose ether, kukhulu ukumelana nodaka kanye nokuguga okukhulu kwemishini.Ngakho-ke, ekwakhiweni komshini wokunamathisela udaka, i-viscosity ephansi ye-cellulose ether ingcono.
Ukumelana ne-sag of plastering mortar
Ngemva kokuba udaka olunamekiwe lufuthwe odongeni, uma ukumelana ne-sag kodaka kungalungile, udaka luzocwila noma lushelele, kuthinte kakhulu ukucaba kodaka, okuzodala inkinga enkulu ekwakhiweni kamuva.Ngakho-ke, udaka oluhle kufanele lube ne-thixotropy enhle kakhulu kanye nokumelana ne-sag.Ukuhlola kutholwe ukuthi ngemva kokuba i-cellulose ether ene-viscosity engu-50,000 kanye ne-100,000 yamiswa yabheka phezulu, amathayela ashelela phansi ngokuqondile, kuyilapho i-cellulose ether ene-viscosity engu-150,000 kanye no-200,000 ayizange ishelele.I-engeli isamile iqonde, futhi akukho ukushelela okuzokwenzeka.
Amandla odaka lokuplasta
Kusetshenziswa ama-cellulose ether angu-50 000,
Isikhathi sokuthumela: Mar-15-2023