Hoobkas Nqe Zoo Silica Hmoov
Dab tsi yog silica fume? Silica yog ib yam khoom uas tshwm sim nyob rau hauv cov zaub mov, flint thiab nyob rau hauv ib co nroj tsuag nyob rau hauv crystalline theem. Silica feem ntau siv hauv kev lag luam yog nyob rau hauv daim ntawv hluavtaws. Deg cheeb tsam, pore ntim, pore loj thiab particle loj yog nws tus kheej tswj tau rau qee yam. Lub crystalline ...
Hauj lwm lawm
Silica yog ib yam khoom uas tshwm sim nyob rau hauv cov zaub mov, flint thiab nyob rau hauv ib co nroj tsuag nyob rau hauv crystalline theem. Silica feem ntau siv hauv kev lag luam yog nyob rau hauv daim ntawv hluavtaws. Deg cheeb tsam, pore ntim, pore loj thiab particle loj yog nws tus kheej tswj tau rau qee yam. Lub crystalline silica tej zaum yuav raug cais raws li atmospheric siab raws li:
ib. Quartz:=1143K
b. Tridymite: 1143 - 1743K
c. Cristobalite:=1743, tshaj 1973K nws tsim amorphous vitreous silica iav.
Peb qhov chaw nyob
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Silica Fume Composition thiab yam ntxwv
Silica fume yog amorphous (non-crystalline) daim ntawv ntawm silicon dioxide. Nws qhov me me me me, ua ke nrog cov purity siab (feem ntau muaj ntau dua 85% SiO₂), ua rau nws muaj txiaj ntsig zoo hauv kev txhaws qhov sib txawv ntawm cov cement nplej. Qhov no txo cov porosity thiab voids nyob rau hauv qhov sib tov, ho txhim kho rheology thiab workability ntawm pob zeb. Kev ua raws li cov qauv kev ua tau zoo, xws li European Standard EN 13263 (Tshooj 1 thiab 2) thiab American Standard ASTM C1240, ua kom muaj kev sib luag thiab kev ntseeg siab hauv silica fume kev ua haujlwm thoob plaws ntau yam kev siv.
Kev sib xyaw ntawm Silica Fume
Cov tshuaj muaj pes tsawg leeg ntawm silica fume feem ntau suav nrog:
| Yam khoom | SIB 2 | AL2O3 | FE2O 3 | MGO | CAO | NA 2 O | PH |
| Tus nqi | 75-95 % | 0.60 % | 0.51 % | 0.7 % | 2.69 % | 0.9 % | Nruab nrab |
Cov ntawv thov tseem ceeb ntawm Silica Fume
1. Cov Khoom Siv Ua Haujlwm Siab
Kev siv ntau tshaj plaws ntawm silica fume yog nyob rau hauv kev tsim cov pob zeb ua haujlwm siab (HPC). Kev suav nrog silica fume ua rau cov engineers thiab cov neeg tsim qauv ua tiav cov hom phiaj hauv qab no:
Nce Compressive zog: Kev sib koom ua ke ntawm silica fume tso cai rau cov pob zeb muaj zog uas ua tau raws li cov kev xav tau tshwj xeeb ntawm cov txheej txheem niaj hnub no, tshwj xeeb tshaj yog rau cov skyscrapers, txuas hniav, thiab offshore platforms.
Superior Durability: Cov khoom siv muaj peev xwm txo qis permeability thiab nce qhov ntom ntom pab tiv thaiv corrosion, ua rau nws zoo tagnrho rau tej yaam num raug mob hnyav xws li marine lug, dams, thiab industrial chaw.
2. Kho Mortars thiab Grouts
Silica fume txhim khu kev ua tau zoo ntawm kev kho mortars thiab grouts los ntawm:
Muab kev sib txuas ntau dua.
Txo shrinkage thiab tawg.
Muab kev txhim kho durability tiv thaiv ib puag ncig stressors.
Cov khoom no tshwj xeeb tshaj yog muaj txiaj ntsig zoo hauv kev siv xws li choj lawj overlays thiab kev kho cov txheej txheem uas qhov kev ua haujlwm ntev ntev yog qhov tseem ceeb.
3. Roj thiab Gas Well Cements
Hauv kev tshawb nrhiav roj thiab roj, cov cement zoo yuav tsum tiv taus qhov kub thiab txias. Qhov sib ntxiv ntawm silica fume txhim khu lub zog compressive thiab thermal stability ntawm cov cements, ua kom muaj kev ncaj ncees ntawm cov dej hauv qhov chaw kub.
4. Cov khoom siv fiber ntau thiab cov pob zeb ua pob zeb
Silica fume plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom siv hluav taws xob ntawm cov khoom siv fiber ntau thiab cov pob zeb ua vaj tse. Kev siv nws ua rau:
Nce durability.
Kev tiv thaiv siab dua rau kev ya raws thiab huab cua.
Txo permeability, ncua lub neej ntawm cov khoom no.
Qhov zoo ntawm Silica Fume hauv Infrastructure thiab Industrial Applications
Cov choj thiab Marine Structures: Lub durability thiab tsis tshua muaj permeability ntawm silica fume-enhanced pob zeb ua rau nws zoo tagnrho rau marine lug thiab txuas hniav. Silica fume pab tiv thaiv chloride-induced corrosion, uas yog ib qho tseem ceeb ua rau deterioration nyob rau hauv lub reinforced pob zeb lug raug rau seawater los yog de-icing ntsev.
Skyscrapers thiab Offshore Platforms: High-strength qhob incorporating silica fume enables kev tsim kho ntawm siab, complex qauv. Offshore platforms, uas tiv taus huab cua, tshwj xeeb tshaj yog tau txais txiaj ntsig los ntawm cov khoom siv zog ntxiv thiab ua kom muaj zog rau tshuaj tua kab mob.
Dams thiab chaw nres tsheb fais fab: Silica fume qhov kev pab cuam rau lub sij hawm ntev lub zog thiab kav ntev yog qhov tseem ceeb rau cov phiaj xwm loj loj xws li dams thiab fais fab nroj tsuag. Nws siv nyob rau hauv cov haujlwm no ua kom lub neej ntev nrog kev saib xyuas tsawg, ua rau muaj txiaj ntsig tag nrho.
Silica Fume Dosage
Qhov pom zoo npaum li cas ntawm silica fume nyob ntawm daim ntawv thov tshwj xeeb:
| Daim ntawv thov | Pom zoo Silica Fume Dosage (% ntawm cement hnyav) |
|---|---|
| High-kev ua tau zoo pob zeb | 5-10% |
| Hydraulic pob zeb | 5-10% |
| Kev txhaj tshuaj | 5-10% |
| Kev pab txhawb nqa | 2-3% |
| Hnav-resistant industrial pem teb | 6-8% |
| Polymer mortar, rwb thaiv tsev mortar | 10-15% |
| Amorphous refractory castables | 6-8% |
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