I-anti-dispersion iyinkomba yezobuchwepheshe ebalulekile yokulinganisa ikhwalithi ye-anti-dispersion agent.IHydroxypropyl methylcellulose iyinhlanganisela ye-polymer encibilika emanzini, eyaziwa nangokuthi i-resin encibilika emanzini noma i-polymer encibilika emanzini.Yandisa ukuhambisana kwengxube ngokwandisa i-viscosity yamanzi okuxuba.Kuyinto hydrophilic polymer material.Ingancibilika emanzini ukwenza isixazululo noma ukuhlakazeka.Ukuhlola kubonisa ukuthi lapho inani le-naphthalene-based high-efficiency superplasticizer likhuphuka, ukungezwa kwe-superplasticizer kuzonciphisa ukumelana nokuhlakazeka kodaka lukasimende olusanda kuxutshwa.Lokhu kungenxa yokuthi isinciphisi samanzi esisebenza kahle kakhulu esisekelwe ku-naphthalene siyisisetshenziswa esenziwe nge-surfactant.Lapho isinciphisi samanzi sengezwa odongeni, isinciphisi samanzi sizoqondiswa ebusweni bezinhlayiya ze-samente ukuze wenze ubuso bezinhlayiya ze-cement zibe nenkokhelo efanayo.Lokhu kukhishwa kukagesi kwenza izinhlayiya ze-cement zenze Isakhiwo se-flocculation ye-cement sihlakazwa, futhi amanzi ahlanganiswe esakhiweni akhululwa, okuzobangela ukulahlekelwa ingxenye yesimenti.Ngesikhathi esifanayo, kutholakala ukuthi ngokwanda kokuqukethwe kwe-HPMC, ukumelana nokuhlakazeka kodaka olusha lukasimende kuba ngcono futhi kuba ngcono.
01. Ukwengezwa kwe-HPMC kunomphumela osobala wokuhlehlisa ingxube yodaka.Ngokukhuphuka kokuqukethwe kwe-HPMC, isikhathi sokusetha sodaka sinwetshwa ngokulandelana.Ngaphansi kokuqukethwe okufanayo kwe-HPMC, udaka olwakhiwe ngaphansi kwamanzi luyashesha kunalokho okusemoyeni Ukubumba kuthatha isikhathi eside ukusetha.Lesi sici sinenzuzo ngokumpompa ukhonkolo ngaphansi kwamanzi.
02. Ukwengezwa kwe-ejenti yokunciphisa amanzi kuthuthukisa inkinga yokwanda kwesidingo samanzi sodaka, kodwa umthamo wawo kufanele ulawulwe ngokunengqondo, ngaphandle kwalokho ukumelana nokuhlakazeka ngaphansi kwamanzi kodaka lukasimende olusanda kuxutshwa ngezinye izikhathi kuzoncipha.
03. Kunomehluko omncane esakhiweni phakathi kwesifanekiso sokunamathisela usimende esixutshwe ne-HPMC kanye nesifanekiso esingenalutho, futhi kunomehluko omncane esakhiweni nasekushubeni kwesifanekiso sokunamathisela usimende esithelwa emanzini nasemoyeni.Isifanekiso esakhiwe ngaphansi kwamanzi izinsuku ezingama-28 sicwebile kancane.Isizathu esiyinhloko ukuthi ukungezwa kwe-HPMC kunciphisa kakhulu ukulahlekelwa nokuhlakazwa kukasimende lapho uthela emanzini, kodwa futhi kunciphisa ukubumbana kwetshe likasimende.Kuphrojekthi, ngaphansi kwesimo sokuqinisekisa umphumela wokungahlakazeka ngaphansi kwamanzi, umthamo we-HPMC kufanele wehliswe ngangokunokwenzeka.
Ingxube kakhonkolo engaphansi kwamanzi engahlakazeka ye-HPMC isetshenziswa kubunjiniyela besisekelo sebhuloho sendlela esheshayo, futhi ileveli yamandla edizayini ingu-C25.Ngokwesivivinyo esiyisisekelo, inani likasimende lingama-400kg, intuthu ye-silica ehlanganisiwe ingu-25kg/m3, inani eliphelele le-HPMC liyi-0.6% yenani likasimende, isilinganiso samanzi-simende ngu-0.42, izinga lesihlabathi lingama-40%. kanye nokuphuma kwe-naphthalene-based high-efficiency water reducer is Inani likasimende liyi-8%, isibonelo sikakhonkolo esisemoyeni izinsuku ezingu-28, amandla ajwayelekile angama-42.6MPa, ukhonkolo ongaphansi kwamanzi onokuphakama kokudonsa okungu-60mm izinsuku ezingu-28. , amandla ajwayelekile angama-36.4MPa, isilinganiso samandla sokhonkolo owenziwe ngamanzi kanye nokhonkolo owenziwe ngomoya 84.8%, umphumela ubaluleke kakhulu.
Isikhathi sokuthumela: Apr-24-2023