Pob zeb ua ke yog ib hom khoom siv ntawm tsev tsim los ntawm ntau cov neeg tsim kho vaj tsev tam sim no. Yog tias muaj qhov sib tsoo ntawm cov pob zeb thaum lub sijhawm tsim vaj tse, thaum lub pob tawg loj heev, nws yooj yim heev los ua kom cov xau ntawm pob zeb ua qauv, uas ua rau muaj kev txo qis dua. Kev ruaj khov ntawm cov pob zeb ua tiav yog cuam tshuam ncaj qha rau kev nyab xeeb ntawm lub tsev. Yog li, nws yog qhov tseem ceeb heev los txo cov pob zeb tawg, uas tseem yog qhov teeb meem muaj kev txhawj xeeb ntau ntawm ntau lub tsev tsim kho.
Hauv kev coj ua, peb feem ntau siv superplasticizer thiab ntxhia admixture, uas tuaj yeem ua kom tau raws li kev xav tau kev ua haujlwm, tab sis cov teeb meem pob zeb tawg tsis tuaj yeem txhim kho, yog li tam sim no peb siv ntau tus neeg sawv cev, uas tuaj yeem txhim kho lub peev xwm tiv thaiv ntawm pob zeb ua ke thiab tiv thaiv kev tawg. Cov. Piv nrog shrinkage txo tus neeg sawv cev thiab cov hluavtaws hluavtaws, kev sib xyaw ua tus sawv cev mus rau cov pob zeb ua haujlwm yog cov txheej txheem nqi, tshwj xeeb yog siv cov neeg sawv cev nthuav dav uas yog qub pov tseg raws li cov khoom siv raw, uas zoo heev txhim kho kev siv cov khoom siv. Cov vanadium hlau slag yog cov khib nyiab uas ua los ntawm cov smelting, uas tuaj yeem them nyiaj me me, tswj kev ruaj khov ntawm kev ua vaj tse, thiab muaj dej num. Yog li ntawd, nrog nws cov kev ua tau zoo yav tom ntej, nws muaj peev xwm hloov qhov kev nquag siv calcium sulphoaluminate expansion tus neeg sawv cev thiab ua tus nyiam tshiab hauv kev lag luam qhob. Nws qhov zoo yog raws li hauv qab no:
Ua ntej tshaj plaws, raws li admixture ntawm cov khoom siv raws li cov cement, ferrovanadium slag muaj cov cuab yeej kev cuam tshuam shrinkage. Thaum nws siv rau hauv cov qhob ntsej muag pob zeb, nws tuaj yeem ua kom tsis txhob shrinkage, txo cov pob zeb tawg thiab txhim kho kom ruaj khov. Kev txiav txim siab ntawm ntau yam tseem ceeb xws li kev ua kom muaj zog, dhau los ntawm kev sim ceevfaj, nws tuaj yeem ua pov thawj tias cov khoom siv MAAs tau zoo dua compressive thiab tawg tsis kam thaum qhov feem ntawm vanadium thiab hlau slag yog 15% ~ 20%.
Qhov ob, qhov sib xyaw ua kom hnyav thiab lub zog hnyav ntawm cov pob zeb sib xyaw nrog cov hmoov tshauv ib leeg, vanadium slag thiab ya cov hmoov tshauv yog qhov siab dua qhov ntawm cov ntshiab cov pob zeb ua kev, tshwj xeeb tshaj yog cov kev sib xyaw ua ke nrog vanadium slag thiab ya cov hmoov tshauv. Qhov kev tsim kho tiag tiag qhia tau hais tias thaum 20% vanadium hlau slag thiab 10% yoov ntoo tshauv yog siv hloov ntawm cov cement thiab sib xyaw ua vaj tse, daim ntawv thov siv tau zoo nyob rau hauv ob lub vaj huam sib luag muaj zog.
Kev siv ferrovanadium slag los hloov cov cement, tsis hais hauv kev txhim kho kev ua tau zoo ntawm cov khoom siv MAAs, los yog kev siv cov pov tseg kev lag luam, ua lub luag haujlwm zoo, tsis tsuas yog tiv thaiv pob zeb tawg, tab sis tseem txuag nyiaj thiab kev tiv thaiv ib puag ncig.
Puguang Teqi cov khoom lag luam yog 25-46m me me thiab nruab nrab cov qhob twj tso kua mis tsheb nrog cov txuj ci tseem ceeb thiab cov nqi ua haujlwm zoo. Nws ib txwm ua raws li lub tswv yim kev pabcuam ntawm "zoo kev coj tus kheej ntseeg hnyav, kev pabcuam txhim kho kev ua lag luam", thiab sib zog ua haujlwm tsim kev pabcuam kev tswj hwm kev tsim khoom ntse.
Lub sij hawm tshaj tawm: Tsib Hlis-19-2020