Idethi Yokuthumela: 30, Sep, 2024
(5) I-ejenti yamandla angaphambi kwesikhathi kanye ne-ejenti yokunciphisa amanzi yamandla angaphambi kwesikhathi
Ezinye zengezwa ngokuqondile njengezimpushana ezomile, kanti ezinye kufanele zixutshwe zibe izixazululo futhi zisetshenziswe ngokulandela imiyalelo yokusetshenziswa. Uma ixutshwe ngendlela ye-powder eyomile, kufanele yomile-ihlanganiswe nosimende bese ihlanganisa kuqala, bese ufaka amanzi, futhi isikhathi sokuxuba akufanele sibe ngaphansi kwemizuzu emi-3. Uma isetshenziswe njengesixazululo, amanzi ashisayo ku-40-70 ° C angasetshenziswa ukusheshisa ukuqedwa. Ngemuva kokuthulula, kufanele imbozwe ngefilimu yepulasitiki yokwelapha. Ezindaweni ezinezinga lokushisa eliphansi, kufanele limbozwe ngezinto zokufakelwa. Ngemuva kokumiswa kokugcina, kufanele iniselwe futhi ifakwe emanzini ngokushesha ukuze ilashwe. Lapho ukwelapha ngesitimu kusetshenziselwa ukhonkolo oxutshwe ne-ejenti yamandla yakuqala, uhlelo lokwelapha isitimu kufanele lunqunywe ngokuhlolwa.
(6) I-antifreeze
I-antifreeze inamazinga okushisa acacisiwe -5°C, -10°C, -15°C nezinye izinhlobo. Uma uyisebenzisa, kufanele ikhethwe ngokuvumelana nezinga lokushisa eliphansi kakhulu lansuku zonke. Ukhonkolo oxutshwe ne-antifreeze kufanele usebenzise usimende wase-Portland noma usimende ojwayelekile wase-Portland onezinga lamandla elingekho ngaphansi kuka-42.5MPa. Ukusetshenziswa kukasimende we-alumina ephezulu kunqatshelwe ngokuphelele. Ama-antifreeze e-chloride, i-nitrite ne-nitrate anqatshelwe ngokuphelele ukuthi asetshenziswe kumaphrojekthi kakhonkolo acindezelwe. Izinto ezingavuthiwe zikakhonkolo kufanele zishiswe futhi zisetshenziswe, futhi izinga lokushisa le-mixer akumele libe ngaphansi kuka-10°C; inani le-antifreeze kanye nesilinganiso samanzi-samente kumele ilawulwe ngokuqinile; isikhathi sokuxuba kufanele sibe ngu-50% ubude kunokuxuba okujwayelekile kwezinga lokushisa. Ngemuva kokuthulula, kufanele imbozwe ngefilimu yepulasitiki nezinto zokufakelwa, futhi akukho ukuchelela okufanele kuvunyelwe ngesikhathi sokugcinwa emazingeni okushisa amabi.
(7)I-ejenti enwebayo
Ngaphambi kokwakhiwa, ingxube yesilingo kufanele yenziwe ukuze kunqunywe umthamo futhi kuqinisekiswe izinga lokunweba elinembile. Ukuxuba kwemishini kufanele kusetshenziswe, isikhathi sokuxuba akufanele sibe ngaphansi kwemizuzu engu-3, futhi isikhathi sokuxuba kufanele sibe imizuzwana engu-30 ubude kunokhonkolo ngaphandle kwezingxube. Ukhonkolo onxephezela ukushwabana kufanele unyakaziswe ngomshini ukuze kuqinisekiswe ukubumbana; ukudlidliza komshini akufanele kusetshenziselwe ukugcwalisa ukhonkolo onwetshiwe ngokuwa okungaphezu kuka-150mm. Ukhonkolo onwetshiwe kufanele welashwe endaweni enomswakama isikhathi esingaphezu kwezinsuku eziyi-14, bese kuthi lesi sakamuva selashwe ngokufafaza nge-ejenti yokwelapha.
(8)I-ejenti yokusetha esheshayo
Uma usebenzisa ama-ejenti wokusetha okusheshayo, kufanele kuqashelwe ngokugcwele ukuguquguquka kukasimende, futhi umthamo kanye nezimo zokusebenzisa kufanele zibanjwe ngendlela efanele. Uma okuqukethwe kwe-C3A ne-C3S kusimende kuphezulu, ingxube kakhonkolo ye-accelerator kufanele ithululwe noma ifuthwe kungakapheli imizuzu engu-20. Ngemuva kokwakhiwa kokhonkolo, kufanele kufakwe umswakama futhi kugcinwe ukuvimbela ukoma nokuqhekeka.
Isikhathi sokuthumela: Oct-09-2024
