Daim ntawv thov ntau yam ntawm polycarboxylic acid superplasticizer yog dab tsi?
Jun 17, 2024
Polycarboxylate superplasticizers (PCEs)yog cov kev ua tau zoo ntawm cov pob zeb sib xyaw uas siv dav hauv kev tsim kho niaj hnub vim lawv cov peev xwm txo qis dej, ib puag ncig tus phooj ywg, thiab yooj yim rau kev siv pob zeb.
Daim ntawv thov:
High-Strength Concrete:PCEs yog qhov tseem ceeb hauv kev tsim cov pob zeb ua kom muaj zog, feem ntau tshaj C45 qib zog, ua kom cov pob zeb ua haujlwm zoo thaum txo cov nqi tag nrho.
Self-Compacting thiab Pumped Concrete:Cov superplasticizers no txhim kho flowability ntawm pob zeb, ua rau lawv zoo tagnrho rau nws tus kheej-compacting pob zeb (SCC) thiab pumped pob zeb daim ntaub ntawv. Qhov no ua kom ntseeg tau tias cov pob zeb tuaj yeem ntws tau yooj yim mus rau hauv cov formworks complex thiab densely reinforced cheeb tsam yam tsis muaj segregation .
Precast Concrete:PCEs yog siv nyob rau hauv precast qhob manufacturing kom ua tau siab thaum ntxov lub zog, tso cai rau kom sai demolding thiab ua cov pob zeb ua.
Pob zeb loj:Retarding PCEs yog tsim rau cov pob zeb loj, vim lawv pab tswj cov cua sov ntawm cov dej thiab txo qhov kev pheej hmoo ntawm thermal cracking.
Cua-Entrained Concrete:Cov admixtures no tseem tuaj yeem siv rau hauv cov khoom siv cua hauv huab cua, tshwj xeeb tshaj yog thaum ua ke nrog defoamers los tswj cov ntsiab lus huab cua. Qhov kev sib xyaw ua ke no txhim kho cov kav ntev thiab khov-thaw ua haujlwm ntawm pob zeb.
Khoom:
Dej txo:PCEs txo cov ntsiab lus ntawm cov dej uas yuav tsum tau muaj nyob rau hauv cov pob zeb sib tov, ua tiav cov dej txo cov nqi ntawm {{0}}% nrog rau cov tshuaj ntau npaum li cas ntawm 0.2-1.0% los ntawm cov cement hnyav. Qhov kev ua haujlwm siab no ua rau txhim kho lub zog thiab durability ntawm cov pob zeb.
Txhim kho kev ua haujlwm:PCEs txhim khu kev ua haujlwm ntawm cov pob zeb sib tov, muab kev tuav pov hwm zoo dua yam tsis muaj dej ntxiv. Cov cuab yeej no tshwj xeeb tshaj yog rau kev tsim cov kua dej, tsis tau ruaj khov pob zeb sib tov haum rau ntau yam kev tsim kho.
Environmental Benefits:Los ntawm kev txo cov cement thiab dej cov ntsiab lus xav tau rau kev sib xyaw ua vaj tse, PCEs pab txhawb kev tsim kho kom ruaj khov, txo qis tag nrho cov pa roj carbon hneev taw ntawm kev tsim ua vaj tse.
Compatibility nrog lwm cov khoom xyaw:PCEs tuaj yeem siv ua ke nrog lwm cov khoom sib xyaw xws li accelerators thiab corrosion inhibitors. Lawv qhia cov nyhuv synergistic thaum siv nrog calcium-based accelerators, txhim kho lub zog thaum ntxov tsis muaj kev cuam tshuam rau kev ua haujlwm.
Molecular Structure:Lub molecular architecture ntawm PCEs, muaj ntau yam kev ua haujlwm xws li -COOH thiab -OH, tso cai rau kev sib cuam tshuam nrog cov cement hais. Qhov no ua rau kom zoo heev dispersion thiab txo flocculation, txhim kho tag nrho cov kev ua tau zoo ntawm cov pob zeb.
Kev txiav txim siab:
Dosage thiab Compatibility:Kev noj tshuaj kom raug yog qhov tseem ceeb kom ua tiav cov txiaj ntsig xav tau. Kev siv tshuaj ntau dhau tuaj yeem ua rau muaj huab cua ntau dhau los yog kev sib cais, thaum underdosing yuav tsis txo cov dej txaus.
Kev sib tham nrog Clays:PCEs tuaj yeem hloov tsis tau adsorbed los ntawm av nplaum nplua nyob rau hauv aggregates, uas tej zaum yuav xav tau kev hloov kho nyob rau hauv ntau npaum li cas los tswj cov khoom vaj tse uas xav tau.
Hauv cov ntsiab lus, polycarboxylate superplasticizers yog ntau yam thiab muaj txiaj ntsig admixtures uas txhim kho kev ua tau zoo ntawm cov pob zeb hauv ntau daim ntawv thov, los ntawm lub zog siab mus rau nws tus kheej compacting thiab precast pob zeb. Lawv lub peev xwm los txo cov ntsiab lus dej thiab txhim kho kev ua haujlwm, ua ke nrog cov txiaj ntsig ib puag ncig, ua rau lawv muaj txiaj ntsig zoo hauv cov cuab yeej ua vaj tsev niaj hnub.
