Ukumelana nokuhlakazeka kuyinkomba yezobuchwepheshe ebalulekile yokulinganisa ikhwalithi ye-anti - dispersant.IHydroxypropyl methyl cellulose iyinhlanganisela ye-polymer encibilika emanzini, eyaziwa nangokuthi i-resin encibilika emanzini noma i-polymer encibilika emanzini.Yandisa ukuhambisana kwengxube ngokwandisa i-viscosity yamanzi okuxuba.Kuwuhlobo lwe-hydrophilic polymer material, engancibilika emanzini futhi yakhe isixazululo noma uketshezi oluhlakazekayo.Ukuhlola kubonisa ukuthi lapho inani le-naphthalene system superplasticizer likhuphuka, ukungezwa kwe-superplasticizer kuzonciphisa ukumelana nokuhlakazeka kodaka olusha lukasimende.Lokhu kungenxa yokuthi uchungechunge lwe-naphthalene olusebenza kahle kakhulu lokunciphisa amanzi luyingxenye ye-ejenti esebenzayo engaphezulu, lapho i-ejenti yokunciphisa amanzi yengezwa odakeni, i-ejenti yokunciphisa amanzi endaweni eqondile yezinhlayiya zikasimende ezinecala elifanayo, i-electric repulsion flocculation. isakhiwo sezinhlayiya ze-cement ezakhiwe ngokuhlukanisa, ukugoqa esakhiweni sokukhululwa kwamanzi, kuzobangela ukulahlekelwa kwengxenye yesimende.Ngaso leso sikhathi, kutholakala ukuthi ngokwanda kokuqukethwe kwe-HPMC, ukuhlakazeka kwe-anti kodaka olusha lukasimende kungcono futhi kungcono.
Izici zamandla zikakhonkolo:
Ingxube kakhonkolo engaphansi kwamanzi engahlakazisi ye-HPMC isetshenziswe kubunjiniyela besisekelo sebhuloho sendlela esheshayo, futhi izinga lamandla okuklama lalingu-C25.Ngemuva kokuhlolwa okuyisisekelo, isilinganiso sikasimende singu-400kg, ingxube ye-silica fume ehlanganisiwe engu-25kg/m3, umthamo omkhulu we-HPMC ngu-0.6% wesilinganiso sikasimende, isilinganiso sikasimende samanzi ngu-0.42, isilinganiso sesihlabathi singu-40%, isivuno se-naphthalene sokunciphisa amanzi singu-8%. umthamo usimende, isampula ukhonkolo emoyeni 28d, amandla isilinganiso 42.6MPa, Amandla isilinganiso amanzi ukhonkolo wathela nge ukuphakama falling 60mm emanzini 36.4mpa izinsuku 28, futhi isilinganiso amandla ukhonkolo kwakhiwa ngo. amanzi kanye nokhonkolo owenziwe emoyeni ngu-84.8%, okubonisa umphumela obalulekile.
1. Ukwengezwa kwe-HPMC kunomphumela osobala wokuvinjelwa kwengxube yodaka.Ngokukhuphuka komthamo we-HPMC, isikhathi sokusetha sodaka siyandiswa ngokulandelana.Ngaphansi kwesimo esifanayo somthamo we-HPMC, isikhathi sokumisa udaka lwangaphansi kwamanzi side kunaleso somoya.Lesi sici sinenzuzo ngokumpompa ukhonkolo ngaphansi kwamanzi.
2, exutshwe ne-hydroxypropyl methyl cellulose yodaka olusha lukasimende inokuhlangana okuhle, cishe akukho mkhuba wokopha.
3, Umthamo we-HPMC kanye nesidingo samanzi odaka kuqala sehle sase senyuka kakhulu.
4. Ukufakwa kwesinciphisi samanzi kuthuthukisa inkinga yokwanda kwesidingo samanzi sodaka, kodwa kufanele kulawulwe ngokunengqondo, kungenjalo ngezinye izikhathi kuzonciphisa ukumelana nokuhlakazeka ngaphansi kwamanzi kodaka olusha lukasimende.
5. Kunomehluko omncane ekwakhekeni phakathi kwezibonelo ze-HPMC ezixutshwe usimende zenethi eziludaka kanye nezibonelo ezingenalutho, futhi kukhona umehluko omncane ekwakhekeni nasekuhlanganeni phakathi kwezibonelo zikasimende ezithululiwe nomoya othululwe usimende wenethi oludaka lwesampula.Isifanekiso sokubumba sangaphansi kwamanzi esingu-28d sikhululekile kancane.Isizathu esiyinhloko ukuthi ukungezwa kwe-HPMC kunciphisa kakhulu ukulahlekelwa nokuhlakazwa kukasimende ngesikhathi sokuthululwa kwamanzi, kodwa futhi kunciphisa izinga lokuhlanganisa usimende.Kuphrojekthi, ngaphansi kwesimo sokuqinisekisa umphumela wokungahlakazi kwamanzi ngaphansi kwamanzi, inani lokuxutshwa kwe-HPMC liyancishiswa ngangokunokwenzeka.
I-6, engeza i-HPMC ngaphansi kwamanzi ayihlakazi ingxube kakhonkolo, ilawula inani lamandla amahle, iphrojekthi yokuhlola ikhombisa ukuthi isilinganiso samandla sokwenza ukhonkolo emanzini nokwakhiwa emoyeni singama-84.8%, umphumela ubaluleke kakhulu.
Isikhathi sokuthumela: Sep-17-2022