Idethi Yokuthumela: 8, Julayi, 2024
1. Izinga lokuncishiswa kwamanzi liyashintshashintsha ukusuka phezulu ukuya phansi, okwenza kube nzima ukulawula ngesikhathi somklamo.
Izinto zokukhangisa ze-polycarboxylic acid-based ejenti ezinciphisa amanzi ngokuvamile zikhuthaza ikakhulukazi imiphumela yazo yokunciphisa amanzi kakhulu, njengezinga lokunciphisa amanzi elingu-35% noma ngisho no-40%. Kwesinye isikhathi izinga lokwehliswa kwamanzi liphezulu impela uma ehlolwa elabhorethri, kodwa uma kuziwa endaweni yephrojekthi, kuvame ukumangala. Kwesinye isikhathi izinga lokunciphisa amanzi lingaphansi kwama-20%. Eqinisweni, izinga lokunciphisa amanzi liyincazelo eqinile kakhulu. Kubhekiselwa kuphela ekusetshenzisweni kukasimende webhentshimakhi, isilinganiso esithile sokuxutshwa, inqubo ethile yokuhlanganisa, kanye nokulawulwa kokuwa kokhonkolo kuya ku-(80+10) mm ngokuhambisana nezinga le-"Concrete Admixtures" GB8076. idatha elinganiswa ngaleso sikhathi. Kodwa-ke, abantu bahlala besebenzisa leli gama ezikhathini eziningi ezahlukene ukuze babonise umphumela wokunciphisa amanzi wemikhiqizo, okuvame ukuholela ekungabonini kahle.
2. Uma sikhulu inani le-ejenti yokunciphisa amanzi, ngcono umphumela wokunciphisa amanzi.
Ukuze kulungiswe ukhonkolo oqinile futhi kuncishiswe isilinganiso sikasimende wamanzi, izisebenzi zobunjiniyela nezobuchwepheshe ngokuvamile zidinga ukuqhubeka nokwandisa inani le-ejenti yokunciphisa amanzi ye-polycarboxylate ukuze bathole imiphumela emihle. Kodwa-ke, umphumela wokunciphisa amanzi we-ejenti yokunciphisa amanzi esekelwe ku-polycarboxylic acid uncike kakhulu kumthamo wayo. Ngokuvamile, njengoba umthamo we-ejenti yokunciphisa amanzi ukhuphuka, izinga lokunciphisa amanzi liyakhula. Kodwa-ke, ngemva kokufinyelela umthamo othile, umphumela wokunciphisa amanzi ngisho "uyancipha" njengoba umthamo ukhula. Lokhu akusho ukuthi umphumela wokunciphisa amanzi uyancipha lapho umthamo ukhuphuka, kodwa ngenxa yokuthi ukopha okungathi sína kwenzeka kukhonkolo ngalesi sikhathi, ingxube yekhonkrithi iqinisiwe, futhi uketshezi kunzima ukubonakalisa ngendlela yokwehla.
Ukuze uqinisekise ukuthi imiphumela yokuhlolwa yemikhiqizo ye-polycarboxylic acid superplasticizer yonke ihlangabezana namazinga, umthamo womkhiqizo oshiwo lapho uthunyelwa ukuze uhlolwe awukwazi ukuba phezulu kakhulu. Ngakho-ke, umbiko wokuhlolwa kwekhwalithi yomkhiqizo ubonisa kuphela idatha ethile eyisisekelo, futhi umphumela wokusetshenziswa komkhiqizo kufanele usekelwe emiphumeleni yokuhlola yangempela yephrojekthi.
3. Ukhonkolo olungiswe nge-polycarboxylate ejenti yokunciphisa amanzi uyopha kakhulu.
Izinkomba ezibonisa ukusebenza kwezingxube zikakhonkolo ngokuvamile zihlanganisa uketshezi, ukuhlangana nokugcinwa kwamanzi. Ukhonkolo olungiselelwe nge-polycarboxylic acid-based-based admixtures yokunciphisa amanzi awuhlali uhlangabezana ngokugcwele nezidingo zokusetshenziswa, futhi izinkinga zohlobo olulodwa noma olunye zivame ukwenzeka. Ngakho-ke, ezivivinyweni zangempela, ngokuvamile sisasebenzisa amagama afana nokuchayeka okukhulu kwedwala nokunqwabelana, ukopha okukhulu nokuhlukaniswa, ukunqwabelana kanye nokwehlisa ukuze kuchazwe ngokucacile ukusebenza kwezingxube zikakhonkolo. Izakhiwo zezingxube zikakhonkolo ezilungiselelwe kusetshenziswa ama-ejenti amaningi okunciphisa amanzi asuselwa ku-polycarboxylic acid azwela kakhulu ekusetshenzisweni kwamanzi.
Kwesinye isikhathi ukusetshenziswa kwamanzi kukhuphuka kuphela ngo-(1-3) kg/m3, futhi ingxube kakhonkolo izopha kakhulu. Ukusebenzisa lolu hlobo lwengxube akukwazi ukuqinisekisa ukufana kokuthela, futhi kuzoholela kalula emigodini, ekufakweni kwesihlabathi, kanye nezimbobo ebusweni besakhiwo. Ukukhubazeka okungamukeleki okunjalo kuholela ekwehleni kwamandla nokuqina kwesakhiwo. Ngenxa yokulawula ukuxega kokutholwa nokulawulwa komswakama ohlanganisiwe eziteshini zokuxuba ukhonkolo, kulula ukwengeza amanzi amaningi ngesikhathi sokukhiqiza, okuholela ekopheni nasekuhlukaniseni ingxube kakhonkolo.
Isikhathi sokuthumela: Jul-08-2024
