Ukwakhiwa ngomshini kodaka lokuplasta kwenziwe intuthuko eminyakeni yamuva nje. Udaka lokuplasta luphinde lwathuthuka kusukela endaweni yendabuko yokuzixuba kuya kodaka oluvamile oluxubene nodaka oluxubene olumanzi. Ukuphakama nokusebenza kwalo kanye nokuqina yizinto ezibalulekile zokukhuthaza ukuthuthukiswa kodaka oluxubene nomshini, kanti i-cellulose ether isetshenziswa njengodaka lokuplasta. Isengezo esiyinhloko sinendima engenakuphikwa. Kulolu vivinyo, ngokulungisa i-viscosity kanye nokugcinwa kwamanzi kwe-cellulose ether, nangokuguqulwa kokwenziwa, imiphumela yezinkomba zokuhlola ezifana nesilinganiso sokugcina amanzi, ukulahlekelwa kokuvumelana kwamahora ama-2, isikhathi sokuvula, ukumelana nokuwa, kanye nokugeleza kodaka lokuplasta ekwakhiweni komshini kwafundwa. Ekugcineni, kwatholakala ukuthi i-cellulose ether inezici zesilinganiso esiphezulu sokugcina amanzi kanye nempahla enhle yokugoqa, futhi ifaneleka kakhulu ekwakhiweni kodaka lokuplasta ngomshini, futhi zonke izinkomba zodaka lokuplasta zihlangabezana nezindinganiso zikazwelonke.
Izinga lokugcina amanzi kodaka lokuplasta
Izinga lokugcina amanzi kodaka lokuplasta liyanda lapho i-viscosity ye-cellulose ether isuka ku-50,000 kuya ku-100,000, futhi liyancipha uma lisuka ku-100,000 kuya ku-200,000, kanti izinga lokugcina amanzi le-cellulose ether lokufafaza ngomshini lifinyelele ngaphezu kuka-93%. Uma izinga lokugcina amanzi kodaka liphezulu, mancane amathuba okuthi udaka luzophuma igazi. Ngesikhathi sokuhlola ukufafaza ngomshini wokufafaza ngodaka, kwatholakala ukuthi lapho izinga lokugcina amanzi le-cellulose ether liphansi kuka-92%, udaka luthambekele ekuphumeni kwegazi ngemva kokufakwa isikhathi esithile, futhi, ekuqaleni kokufafaza, kulula kakhulu ukuvimba ipayipi. Ngakho-ke, lapho silungiselela udaka lokuplasta olufanele ukwakhiwa ngomshini, kufanele sikhethe i-cellulose ether enezinga eliphezulu lokugcina amanzi.
Ukuplasta udaka amahora ama-2 ukulahleka kokuvumelana
Ngokwezidingo ze-GB/T25181-2010 “Ready Mixed Mortar”, isidingo sokulahlekelwa kokuvumelana kwamahora amabili kodaka olujwayelekile lokuplasta singaphansi kuka-30%. I-viscosity engu-50,000, 100,000, 150,000, kanye no-200,000 yasetshenziswa ekuhlolweni kokulahlekelwa kokuvumelana kwamahora ama-2. Kungabonakala ukuthi njengoba i-viscosity ye-cellulose ether ikhula, inani lokulahlekelwa kokuvumelana kwamahora ama-2 lodaka lizoncipha kancane kancane, okubonisa nokuthi i-viscosity ye-cellulose ether Uma inani liphezulu, ukuzinza kokuvumelana kodaka kungcono futhi ukusebenza kokulwa nokuhlukanisa kodaka kungcono. Kodwa-ke, ngesikhathi sokufafaza kwangempela, kwatholakala ukuthi ngesikhathi sokwelashwa kokuleveli kamuva, ngoba i-viscosity ye-cellulose ether iphakeme kakhulu, ukuhlangana phakathi kodaka kanye ne-trowel kuzoba kukhulu, okungafanele ukwakhiwa. Ngakho-ke, esimweni sokuqinisekisa ukuthi udaka aluhlali futhi aluhlukanisi, lapho inani le-viscosity le-cellulose ether liphansi, kungcono.
Amahora okuvula okwakha udaka
Ngemva kokuba udaka lokuplasta lufafazwe odongeni, ngenxa yokumuncwa kwamanzi kwesisekelo sodonga kanye nokuhwamuka komswakama ebusweni bodaka, udaka luzokwakha amandla athile esikhathini esifushane, okuzothinta ukwakhiwa kokuleveli okulandelayo. Isikhathi sokugoba sihlaziywe. Inani le-viscosity le-cellulose ether liphakathi kuka-100,000 no-200,000, isikhathi sokubeka asishintshi kakhulu, futhi libuye libe nokuhlobana okuthile nesilinganiso sokugcina amanzi, okungukuthi, lapho izinga lokugcina amanzi liphezulu, isikhathi sokubeka udaka siba side.
Ukugeleza kodaka lokuplasta
Ukulahleka kwemishini yokufafaza kuhlobene kakhulu nokugeleza kodaka lokuplasta. Ngaphansi kwesilinganiso esifanayo samanzi nezinto zokwakha, lapho i-viscosity ye-cellulose ether iphakama, inani lokugeleza kodaka liyancipha. , okusho ukuthi lapho i-viscosity ye-cellulose ether iphakama, ukumelana kodaka kukhulu futhi kukhulu ukuguguleka kwemishini. Ngakho-ke, ekwakhiweni kodaka lokuplasta ngomshini, i-viscosity ephansi ye-cellulose ether ingcono.
Ukumelana nokugoba kodaka lokuplasta
Ngemva kokuba udaka lokuplasta lufafazwe odongeni, uma ukumelana kokugoba kodaka kungahambi kahle, udaka luzogoba noma luze lushelele, okuzothinta kakhulu ukugoba kodaka, okuzobangela inkinga enkulu ekwakhiweni kwakamuva. Ngakho-ke, udaka oluhle kumele lube nokumelana okuhle kakhulu kwe-thixotropy kanye nokugoba. Ukuhlolwa kuthole ukuthi ngemva kokuba i-cellulose ether ene-viscosity engu-50,000 kanye ne-100,000 imiswe ngokuqondile, amathayili ashelela phansi ngqo, kuyilapho i-cellulose ether ene-viscosity engu-150,000 kanye ne-200,000 ingashelelanga. I-engeli isamiswe ngokuqondile, futhi akukho ukushelela okuzokwenzeka.
Amandla odaka lokuplasta
Kusetshenziswa ama-ether e-cellulose angu-50,000, 100,000, 150,000, 200,000, kanye no-250,000 ukulungiselela amasampula odaka lokuplasta lokwakhiwa ngomshini, kwatholakala ukuthi ngokwanda kwe-viscosity ye-cellulose ether, inani lamandla odaka lokuplasta liyancipha. Lokhu kungenxa yokuthi i-ether ye-cellulose yakha isisombululo esinobuthi obukhulu emanzini, futhi inani elikhulu lama-bubble omoya azinzile lizofakwa ngesikhathi senqubo yokuxuba udaka. Ngemva kokuba usimende uqinile, lawa ma-bubble omoya azokwakha inani elikhulu lama-voids, ngaleyo ndlela anciphise inani lamandla odaka. Ngakho-ke, udaka lokuplasta olufanele ukwakhiwa ngomshini kumele lukwazi ukuhlangabezana nenani lamandla elidingwa umklamo, futhi i-ether ye-cellulose efanelekile kumele ikhethwe.
Isikhathi sokuthunyelwe: Mashi-15-2023