Qhob Hmoov Accelerator
Cov txheej txheem ceev ceev yog ib qho kev sib xyaw uas ntxiv rau cov pob zeb kom nrawm nws qhov chaw thiab txheej txheem hardening. Cov hom tseem ceeb ntawm cov txheej txheem ceev ceev yog cov ntsev inorganic thiab cov organic tebchaw. Tus nqi siv ib txwm tsuas yog 2-3% ntawm cov ntsiab lus cement hauv pob zeb, tab sis nws ua rau ...
Hauj lwm lawm
Cov txheej txheem ceev ceev yog ib qho kev sib xyaw uas ntxiv rau cov pob zeb kom nrawm nws qhov chaw thiab txheej txheem hardening. Cov hom tseem ceeb ntawm cov txheej txheem ceev ceev yog cov ntsev inorganic thiab cov organic tebchaw. Tus nqi siv ib txwm tsuas yog 2-3% ntawm cov cement cov ntsiab lus hauv cov pob zeb, tab sis nws ua kom cov pob zeb teeb tsa hauv 5 feeb thiab ua kom tag nrho hauv 12 feeb. Qhov no yog qhov tseem ceeb heev rau kev kho thaum muaj xwm txheej ceev lossis siv rau hauv qhov tunnels thiab mines qhov chaw yuav tsum tau ceev ceev. Nws yog ib qho tseem ceeb ntxiv nyob rau hauv daim ntawv thov shotcrete, raws li nws accelerates lub hydration ntawm cement, tsim kom muaj zog txaus nyob rau hauv ib tug luv luv lub sij hawm ntawm lub sij hawm kom tau raws li cov kev cai ntawm xws li kev tsim kho.
Main Components:
Alumina-clinker(Alumina, dej qab zib, thiab quicklime roasted nyob rau hauv ib qho kev faib ua feem thiab ces finely av)
Bauxite(ib qhov chaw ntawm alumina, feem ntau siv rau hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob)
Sodium carbonate(ib qho muaj zog alkaline compound siv nyob rau hauv ntau daim ntawv thov kev lag luam, suav nrog iav thiab tshuaj lom neeg kev lag luam)
Quicklime(calcium oxide, reactive compound siv nyob rau hauv ntau yam kev siv, nrog rau hauv pob zeb ua ib tug ziab khaub ncaws)
Pob zeb ceev ceev Accelerators:
Red Star Kuv Hom Accelerator: Qhov no accelerator yog tsim los ntawm alumina-clinker (tsuas yog sodium aluminate), sodium carbonate, thiab quicklime nyob rau hauv ib tug ratio ntawm 1: 1: 0.5. Qhov kev noj kom haum yog 2.5% rau 4.0% ntawm cov cement hnyav.
7 II Type Accelerator: Ua los ntawm kev sib xyaw alumina-clinker thiab anhydrous gypsum hauv qhov sib piv 3: 1. Qhov kev noj kom haum yog 3% mus rau 5% ntawm cov cement hnyav.
782 Hom Accelerator: Ua los ntawm bauxite, alumina-clinker, thiab quicklime. Qhov kev noj kom haum yog 5% mus rau 7% ntawm cov cement hnyav.
Mechanism ntawm Action:
Tom qab lub accelerator yog tov nrog cov pob zeb, nws ua rau cov pob zeb ua kom pib hauv 5 feeb, tag nrho teeb tsa hauv 10 feeb, thiab nce lub zog sai hauv 1 teev. Lub zog tom qab 1 hnub feem ntau yog 2-3 zaug siab dua li cov pob zeb ib txwm, tab sis nws yuav txo qis thaum lub sijhawm. Tom qab 28 hnub, lub zog feem ntau yog 80-90% ntawm cov pob zeb uas tsis muaj lub accelerator.
Cov txheej txheem ntawm kev teeb tsa sai thiab kev muaj zog thaum ntxov yog ua raws li qhov ua kom nrawm ntawm cov gypsum hauv cov cement, hloov mus rau hauv sodium sulfate (Na2SO4) thiab tiv thaiv qhov kev ua haujlwm ntawm gypsum, ua rau cov dej nrawm ntawm C3A thiab tsim cov crystalline. hydration khoom.
Daim ntawv thov:
Cov txheej txheem nrawm nrawm tau siv dav hauv cov mines, qhov av, cov dej hloov pauv, thiab cov haujlwm hauv av hauv av.
Technical Specifications
| Cov khoom kuaj | Ua kua | Hmoov |
|---|---|---|
| Qhov ntom | Tsis pub dhau ±0.02 g/cm³ ntawm lub Hoobkas tswj tus nqi | - |
| Cov ntsiab lus chloride ion | Tsawg tshaj li qhov siab tshaj plaws tswj tus nqi ntawm lub Hoobkas | Tsawg tshaj li qhov siab tshaj plaws tswj tus nqi ntawm lub Hoobkas |
| Tag nrho cov ntsiab lus Alkali | Tsawg tshaj li qhov siab tshaj plaws tswj tus nqi ntawm lub Hoobkas | Tsawg tshaj li qhov siab tshaj plaws tswj tus nqi ntawm lub Hoobkas |
| Tus nqi pH | Tsis pub dhau ± 1 ntawm lub Hoobkas tswj tus nqi | - |
| Kev zoo | - | 80 μm sieve residue<15% |
| Cov ntsiab lus noo noo | - | Tsawg dua lossis sib npaug rau 2.0% |
| Cov ntsiab lus | Ntau tshaj qhov tsawg kawg nkaus tswj tus nqi ntawm lub Hoobkas | - |
Hom Accelerators:
Alkali-lub ntiaj teb hlau carbonates thiab hydroxides: Feem ntau siv nyob rau hauv shotcrete, cov hmoov accelerators feem ntau muaj 2.5% -6% ntawm cov cement hnyav. Lawv lub luag haujlwm tseem ceeb yog txhawm rau ua kom cov dej ntawm C3S (tricalcium silicate).
Silicate-raws li accelerators (sodium silicate, potassium silicate): These liquid accelerators are mainly used in wet-mix shotcrete applications and require a higher dosage (>10% ntawm cov cement hnyav).
Aluminium-based accelerators(sodium aluminate, potassium aluminate): Cov accelerators no feem ntau yog siv rau hauv kev sib xyaw qhuav lossis ntub-sib xyaw shotcrete, nrog ntau npaum li ntawm 2.5% mus rau 5.5%. Lawv pab ncaj qha rau hauv cov dej ntawm cov cement, ua kom qhov chaw los ntawm kev cuam tshuam nrog gypsum los tiv thaiv kev tsim cov calcium aluminate thiab ua rau C3A hydration tam sim ntawd.
Tsis-alkali kua accelerators: Cov no tsis tshua muaj tab sis yog siv los daws cov teeb meem tshwm sim nrog alkali accelerators, xws li kev phom sij rau kev noj qab haus huv, alkali-tag nrho cov tshuaj tiv thaiv, thiab pH siab.
Cov lus qhia siv:
Sib tov cov ntaub ntawv rau shotcrete raws li kev sib xyaw tsim.
Ntxiv cov accelerator random thaum lub sij hawm txau. Xyuas kom meej tias lub accelerator tau ntxiv ntawm qhov zoo npaum li cas thiab teem sijhawm los ntawm kev sim ua ntej.
Tsis txhob ntxiv cov accelerator thaum cov khoom sib xyaw vim tias cov dej noo hauv cov xuab zeb thiab pob zeb tuaj yeem ua rau cov accelerator decompose ntxov ntxov, cuam tshuam rau nws cov kev ua tau zoo.
Ua cov kev sim ua raws li cov cement ntau yam siv rau qhov project thiab xyuas kom meej npaum li cas rau kev ua haujlwm zoo.
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