Ntau npaum li cas silica fume yuav tsum tau ntxiv rau cov cement?
Jun 03, 2024
Tso lus
Tus nqi ntawm microsilica fume ntxiv rau cov cement feem ntau yog 5-10%.
Microsilica fume, tseem hu ua silica fume, yog ib qho ultrafine hmoov uas tsim thaum lub sij hawm smelting ntawm ferrosilicon thiab industrial silicon. Nws muaj qhov tshwj xeeb ntawm thaj chaw thiab kev ua haujlwm, uas tuaj yeem txhim kho cov khoom ntawm cov cement lossis pob zeb. Ntxiv microsilica fume rau cement tuaj yeem txhim kho lub zog, ntom ntom, impermeability, Frost tsis kam thiab thaum ntxov lub zog ntawm pob zeb. Nws kuj tseem tuaj yeem txhim kho kev puas tsuaj thiab cavitation yaig kuj ntawm pob zeb.
Kev tshawb fawb qhia tau hais tias thaum tus nqi ntawm microsilica fume ntxiv rau 5-10%, lub zog compressive ntawm pob zeb tuaj yeem nce ntxiv los ntawm 10-50%, lub zog flexural tuaj yeem nce ntau dua 10%, lub impermeability tuaj yeem ua tau. tau nce los ntawm 5-8 zaug, thiab cov pa roj carbonation kuj tuaj yeem nce ntxiv Kev txhim kho ntau dua 4 zaug. Tsis tas li ntawd, tus txheeb ze dynamic elastic modulus ntawm qhob tov nrog 10% microsilica fume txo los ntawm 1-2% tom qab 300-500 khov-thaw mus, thaum tus txheeb ze dynamic elastic modulus ntawm cov pob zeb zoo tib yam txo qis tom qab {{9} } cycles. Nws tau raug txo los ntawm 36-73%, uas qhia txog cov txiaj ntsig tseem ceeb ntawm microsilica fume ntawm kev txhim kho cov kav ntev ntawm cov pob zeb.
Hauv kev siv tiag tiag, tus nqi ntawm microsilica fume incorporated yuav txawv raws li lub hom phiaj ntawm kev siv thiab kev ua tau zoo ntawm cov pob zeb. Piv txwv li, rau cov pob zeb ua haujlwm siab, hydraulic pob zeb, shotcrete, thiab lwm yam, qhov pom zoo sib xyaw yog 5-10%. Hauv qee daim ntawv thov tshwj xeeb, xws li thaum siv los ua cov twj tso kua mis, cov nyiaj sib tov tuaj yeem raug txo kom txog li 2%. Qhov kawg ntawm qhov sib xyaw yuav tsum tau txiav txim siab los ntawm kev sib xyaw ua ke kom ntseeg tau tias qhov zoo tshaj plaws kev lag luam thiab kev ua tau zoo.
