Daim Ntawv Qhia Kom Paub Txog Polycarboxylate Superplasticizers Rau Cov Khoom Siv Ua Haujlwm Zoo
Aug 30, 2024
Polycarboxylate superplasticizers sawv cev rau pem hauv ntej ntawm cov khoom siv sib xyaw ua ke, muab kev ua tau zoo tshaj, ua haujlwm ntev, thiab kev siv nyiaj. Raws li cov khoom tseem ceeb hauv cov qauv ua vaj tse niaj hnub no, cov superplasticizers yog qhov tseem ceeb rau kev ua tiav lub zog siab, ua haujlwm siab, thiab nws tus kheej-compacting pob zeb. Hauv phau ntawv qhia ntxaws ntxaws no, peb delve rau hauv cov khoom, kev siv, thiab cov txiaj ntsig ntawm polycarboxylate superplasticizers, muab kev pabcuam zoo rau cov kws tshaj lij hauv kev tsim kho kev lag luam.
Dab tsi yog Polycarboxylate Superplasticizers?
Polycarboxylate superplasticizers yog cov pob zeb sib xyaw ua ke uas feem ntau tsim los ntawm polycarboxylate copolymer, uas ua rau muaj kev ua haujlwm zoo thiab lub zog ntawm pob zeb. Cov superplasticizers txo cov dej-cement piv thaum tswj cov kev xav tau sib xws thiab ua haujlwm tau zoo, ua rau cov pob zeb ua ke nrog cov khoom tshwj xeeb thiab kev ua haujlwm ntev.
Cov khoom tseem ceeb ntawm Polycarboxylate Superplasticizers
Polycarboxylate superplasticizers paub txog lawv cov khoom zoo, uas suav nrog:
1. High Water Reduction Efficiency
Polycarboxylate superplasticizers muaj peev xwm txo tau cov ntsiab lus dej txog li 45%, uas yog siab dua li cov tshuaj txo cov dej ib txwm muaj. Qhov kev txo qis hauv cov ntsiab lus dej ncaj qha txhais mus rau qhov ua kom muaj zog thiab ua kom ntev.
2. Zoo heev Slump Retention
Ib qho ntawm cov yam ntxwv tseem ceeb ntawm polycarboxylate superplasticizers yog lawv lub peev xwm khaws cov pob zeb tawg rau lub sijhawm ntev. Nrog kev poob qis tsawg dua 5% hauv 1 teev thiab tsawg dua 10% hauv 2 teev, cov superplasticizers yog qhov zoo tagnrho rau qhov chaw ua haujlwm ntev ntev yam tsis muaj kev cuam tshuam rau kev ua haujlwm.
3. Enhanced compressive zog
Kev siv cov polycarboxylate superplasticizers ho boosts lub zog compressive ntawm pob zeb. Cov pob zeb kho nrog cov superplasticizers tuaj yeem ua tiav 50-110% nce hauv compressive zog hauv 3 hnub, thiab nce 30-60% tom qab 90 hnub, piv rau cov pa sib xyaw ua ke.
4. Txhim kho kev ua haujlwm thiab Pumpability
Cov pob zeb sib xyaw nrog polycarboxylate superplasticizers nthuav tawm kev ua haujlwm zoo dua, ua kom yooj yim rau twj thiab qhov chaw. Qhov sib tov yog tiv taus los ntshav thiab kev sib cais, ua kom muaj kev sib luag thiab sib xws thoob plaws hauv cov qauv.
5. Haum Huab Cua Cov ntsiab lus
Cov superplasticizers no tswj cov huab cua zoo nyob rau hauv cov pob zeb sib xyaw, uas ua rau kom khov-thaw ua haujlwm zoo thiab ua kom muaj kev ncaj ncees ntawm cov pob zeb hauv qhov hnyav ib puag ncig.
6. Tsawg Alkali Cov ntsiab lus
Nrog rau cov ntsiab lus alkali tsawg dua 0.2%, polycarboxylate superplasticizers txo qhov kev pheej hmoo ntawm alkali-silica cov tshuaj tiv thaiv (ASR), uas tuaj yeem ua rau muaj kev puas tsuaj loj rau cov pob zeb hauv lub sijhawm.
7. Eco-Friendly Composition
Polycarboxylate superplasticizers yog nontoxic thiab tsis muaj teeb meem tshuaj xws li formaldehyde. Lawv pab txhawb kev tsim kho kom ruaj khov los ntawm kev txo cov kev cuam tshuam ib puag ncig ntawm kev tsim ua vaj tse.
8. Kev ruaj ntseg ntev
Cov superplasticizers no muaj kev ruaj ntseg zoo kawg li, tsis muaj delamination, sedimentation, lossis crystallization, txawm tias tom qab ncua sijhawm cia ntawm qhov kub qis.
9. High Compatibility nrog ntau hom Cement
Polycarboxylate superplasticizers yog heev sib xws nrog ntau hom cement thiab ntxhia additives. Qhov kev sib raug zoo no ua rau lawv tshwj xeeb tshaj yog tsim los tsim cov pob zeb ua kom muaj zog thiab nws tus kheej-compacting pob zeb (SCC).
Kev siv ntawm Polycarboxylate Superplasticizers
Polycarboxylate superplasticizers yog ntau yam admixtures uas tuaj yeem siv rau hauv ntau daim ntawv thov, suav nrog:
1. High-Performance Concrete (HPC)
Zoo tagnrho rau tej yaam num uas yuav tsum tau ua vaj tse nrog lub zog siab, durability, thiab tsis kam mus rau ib puag ncig stressors, xws li txuas hniav, high-sawv vaj tse, thiab industrial lug.
2. Self-Compacting Concrete (SCC)
Cov superplasticizers no yog qhov tseem ceeb rau SCC, uas yuav tsum tau muaj kev ua haujlwm zoo heev thiab muaj peev xwm los sau cov formwork nyuaj yam tsis tas yuav muaj kev vibration tshuab.
3. High-Durability Qhob
Polycarboxylate superplasticizers yog qhov zoo tshaj plaws rau kev tsim cov pob zeb ua kom muaj zog tiv thaiv kev tawm tsam tshuaj lom neeg, puas, thiab khov-thaw mus, ua rau lawv tsim nyog rau cov qauv hauv hiav txwv, cov chaw kho dej khib nyiab, thiab lwm qhov chaw hnyav.
4. Aesthetic Concrete Finishes
Vim lawv cov kev tuav pov hwm zoo heev thiab kev ua haujlwm tau zoo, cov superplasticizers yog qhov zoo tagnrho rau kev tsim kom zoo nkauj, zoo nkauj rau cov pob zeb hauv kev siv vaj tse.
| Cov khoom | Index |
|---|
| Qhov tshwm sim | Lub teeb xim av kua |
| Qhov ceev (20 degree) g / ml | 1.09 ± 0.02 |
| Cov ntsiab lus % | 20 ± 1 |
| Cement paste fluidity (cement puag) (mm) | 250 (W/C=0.29) |
| pH | 6-8 |
| Chloride % Tsawg dua los yog sib npaug | 0.02 |
| pH tus nqi (1% dej tov) | 1.5 ~ 2.0 |
| Alkali (Na2O+0.658K2O)(%) Tsawg dua lossis sib npaug | 0.2 |
Cov lus pom zoo siv
Txhawm rau kom muaj txiaj ntsig zoo ntawm polycarboxylate superplasticizers, ua raws li cov kev coj ua zoo tshaj plaws no:
Noj ntau npaum:Qhov pom zoo ntau npaum li cas ntawm {{0}}.4% mus rau 2.0% ntawm cov cementitious cov ntaub ntawv los ntawm qhov hnyav. Feem ntau, qhov ntau npaum li cas ntawm 0.4% rau 1.2% yog txaus. Ib txwm ua qhov kev sim ua ntej los txiav txim siab qhov zoo tshaj plaws rau koj qhov kev sib xyaw tshwj xeeb.
Kev xeem Compatibility:Tsis txhob sib tov polycarboxylate superplasticizers nrog naphthalene-raws li dej reducers. Yog tias siv lwm cov tshuaj sib xyaw, ua qhov kev sib tw ua ntej kom ntseeg tau tias kev ua haujlwm zoo.
Tswj dej:Slump retention yog rhiab heev rau cov ntsiab lus dej. nruj me ntsis tswj cov dej cov ntsiab lus nyob rau hauv cov pob zeb sib tov kom muaj kev xav tau slump thiab workability.
Kho:Kev kho kom zoo yog qhov tseem ceeb kom ua tiav qhov xav tau lub zog thiab kav ntev. Xyuas kom muaj kev kho kom haum raws li kev tiv thaiv kom tsis txhob qhuav ntxov ntxov thiab shrinkage.
Ntim thiab Cia
Polycarboxylate superplasticizers muaj nyob rau hauv daim ntawv ua kua thiab feem ntau ntim rau hauv cov thoob. Rau kev ua tau zoo, khaws cov khoom nyob rau hauv qhov chaw txias, qhuav, deb ntawm tshav ntuj ncaj qha thiab Frost. Cov khoom muaj lub neej txee ntawm ib xyoos thaum khaws cia hauv cov xwm txheej no.
Xaus
Polycarboxylate superplasticizers yog qhov hloov pauv hauv kev lag luam pob zeb, muab kev ua haujlwm tsis sib xws, muaj peev xwm, thiab cov txiaj ntsig ib puag ncig. Txawm hais tias koj tab tom ua haujlwm ntawm kev ua haujlwm siab, kev ua haujlwm ntawm tus kheej, lossis cov pob zeb ua haujlwm siab, cov superplasticizers muab kev ntseeg siab thiab kev ua haujlwm uas yuav tsum tau ua kom tau raws li qhov xav tau ntawm kev tsim kho niaj hnub no.