Yuav ua li cas xaiv cov tsev ua vaj tse ua kom zoo dua los txhim kho cov khoom lag luam zoo?
Feb 12, 2025
1. Qhia meej engineering yam yuav tsum tau thiab ua haujlwm phiaj
Kev Ua Kom Zoo Li Cas
- Ua hauj lwm qib: For grades below C30, normal water reducers (lignosulfonate type) are recommended. For grades above C50, high-efficiency polycarboxylate water reducers (water reduction rate >25% yuav tsum tau siv.
- Elastic modulus: Rau cov choj engineering, thaum cov modulus yuav tsum muaj ntau dua los yog sib npaug ntawm 35 GPA, Steel Fibers ({}}}. 1%) tuaj yeem koom nrog.
Kev Ua Haujlwm Ncaj Ncees Ncaj Ncees
- Khov-Thaw Resistance (F300): Ntxiv cov huab cua-entraining cov neeg sawv cev (cov ntsiab lus cua 4-6%), xws li Rosin-raws polymers.
- Chloride Ion Penetration Kuj (tsawg dua los yog sib luag rau 1000C): Siv Silica Fume (5-10%) + xeb inhibitor (calcium nitrite 3%).
- Sulphate tsis kam: Nyiam dua siv cov hmoov ntxhia pob zeb (muaj ntau dua lossis sib npaug rau qib S95) los hloov 30% ntawm cov cement.
Kev tsim kho cov txheej txheem tsis
- Pumping Height >300m: Xav tau ntxiv viscosity modifiers (piv txwv li, hydroxypropyl methyl cellulose {}}}}. 05%).
- Cov Khoom Loj Loj Ua Vaj Tse: Siv retarders (sodium gluconate 0. {}}. Cov tshuaj ntsuab}.
- Lub caij ntuj no siv (-10 degree): Siv cov tshuaj pleev thaum ntxov-lub zog tiv thaiv sawv ntxov (calcium nitrate + sodium nitrite composite system).
2. Cov Ntsiab Ntxiv Kev Xaiv Kev Xaiv
| Additive Hom | Cov yam ntxwv ua tau zoo | Muaj cov xwm txheej muaj feem xyuam | Cov tshuaj tau ntau npaum li cas |
|---|---|---|---|
| Polycarboxylate Dej Reducer | Dej txo tus nqi 25-40}%, slum foob 2 teev | High-Zuag Zog Tso Ua Ntau | {{0 {0}}. {{8-1. 5% ntawm binder qhov hnyav |
| Tus ceev nyiaj | Txuas ntxiv teem sijhawm sijhawm los ntawm 4-8 teev | Lub Caij Ntuj Sov Siv / Cov Khoom Loj | 0.03-0.1% |
| Thaum Ntxov muaj zog tus neeg sawv cev | Nce 3-} Hnub Muaj Zog by 30-50% | Prefabricated Cheebtsam / Kho Ceev | 2-5% |
| Tus neeg sawv cev waterproofing | Waterproof qib muaj ntau dua lossis sib npaug rau P12 | Cov Qauv Hauv Qab Zib / Hydraulic Cov Haujlwm | 3-8% |
| Tus Neeg Sawv Cev nthuav | Txwv tsis pub nthuav tawm tus nqi 0. {015-0. 025% | Kev tsim tsa ntawm super-ntev qauv | 8-12% |
| Tus neeg sawv cev fiber ntau ntxiv | Nce nrib tawm tsam index los ntawm 40-60% | Pa pavement / choj Deck Paving | {{0 {0}}. {9-1. 8kg / m³ |
3. Cov khoom siv sib xyaw ua ke
Kev Ntsuam Xyuas MAAX Kev Ntsuas Xyuas
- Net muab tshuaj ntsuam: Pib ntws ntau dua lossis sib npaug nrog 260 hli, {1- teev poob tsawg dua los yog sib npaug rau 30mm (GB / T 8077).
- Teem sijhawm sib txawv: Pib teeb tsa ± 90min, kawg teeb tsa ± 120min (piv rau cov qauv hauv paus).
Kev ntsuas kev sib sau ua ke
- If mud content >3%, nce cov roj reducer noj tshuaj los ntawm 0. {2}}. 5% lossis ntxiv viscosity reducer.
- Rau manufacturation tshuab nrog pob zeb hmoov cov ntsiab lus {{{}}}}}}}}}, xanthan ntawm cov pos hniav (piv txwv, xanthan ntawm cov pos hniav 0.005%).
Puas siv cov ntawv pov thawj siv
- Tus Neeg Tshaj Tawm Kev nthuav dav + Dej Reducer: Sim ntsuas qhov {{{{0}}}} hnub nthuav kev txwv (ntau dua los yog sib npaug rau 0.015%).
- Fiber ntau + dej reducer: Khij cov kev sib xyaw ua ke (tsis muaj fiber clumping).
4. Lub neej lub voj voog ua kom zoo dua
Nqi-Kev Ntsuam Xyuas Kev Ntsuam Xyuas Qauv
- Ua nqi ua haujlwm: Qhov ntxiv ntawm cov tshuaj tiv thaiv dej ntws nce ntxiv tus nqi los ntawm 8 yuaan / m³, tab sis txo cov nqi waterproof siv los ntawm 25 yuan / m².
- Cov txiaj ntsig ruaj khov: Ntxiv 30% Pob Ntawv Me% txo cov chloride ion diffusion coeffusent by 50%, txuas ntxiv tus qauv lub neej los ntawm 20 xyoo.
Kev tsim kho kev tsim kho
- Ntxiv superplasticizers tuaj yeem txo lub sijhawm ua ntej 30%, txuag {}}}% nyob rau hauv cov tub rog cov nqi.
- Thaum ntxov-lub zog tiv thaiv shorten lub voj voog los ntawm 1/3, nce caum qab siv hloov khoom siv los ntawm 40%.
5. Engineering Kev Kawm Txuj Ci
Rooj plaub 1: hla hiav txwv Choj bearing (C45F300W8)
- Qhov Ntsuas Optimization:
PARH O 42.5 Maas 320Kg / m³
Cov hmoov av (s95) 80kg / m³
Polycarboxylate Dej Reducer (nrog Air Entraining) 1.2%
Tsoom-afibring waterproofing Tus Neeg Sawv Cev 5%
- Qho kawg:
Chloride Ion Diffusion Coefficient: 1.2 × 1011 m² / s
Khov-thaws mus txog 35 0}, kev poob loj: 0.8%
Rooj plaub 2: Super-siab tseem ceeb tub rog C60 tus kheej-compacting qhob
- Cov thev naus laus zis tseem ceeb:
Composite Viscosity Transfifier (HPMC 0. 03%)
Steel fibers (30kg / mp)
Rov qab ua Reducerboxylate Dej Reducer 1.5%
- Kev Siv Ua Haujlwm:
Tso qhov siab: 402m
Slump Khaws: 650 ± 50mm rau 2 teev
6. Cov ntsiab lus tswj hwm zoo
Qhov tseeb meterting System
- Kua ua kom cov me nyuam ua yuam kev tsawg dua lossis sib npaug ntawm 1%, Hmoov qhuas tsawg dua lossis sib npaug {1}}. 5%.
- Siv cov tso tsheb hlau luam ywj siab + loj tua meters rau kaw-voj tswj.
Kev Ntsuam Xyuas Cov Qauv
- Real-time slump soj ntsuam (phiaj tus nqi ± 20mm).
- Tswj kub (molding kub tsawg dua los yog sib npaug rau 30 degree, kub nce siab dua lossis sib npaug rau 20 degree).
Tswjhwm
- Bim qauv ua haujlwm rau cov khoom siv, cia li txuas ntxiv cov qauv ntxiv.
- Iot sensors soj xyuas kev loj hlob kev loj hlob kev loj hlob thaum lub sijhawm ua kom tawv nqaij tawv.
