Kev cuam tshuam ntawm cov av nkos ntawm cov xuab zeb ntawm lubpolycarboxylate superplasticizerfeem ntau tuag taus, uas yog pom tseeb dua li naphthalene series thiab aliphatic superplasticizers. Thaum cov av nkos cov ntsiab lus nce, qhov ua haujlwm ntawm cov pob zeb ua haujlwm tau zoo dua los ntawm kev nce tus nqipolycarboxylate superplasticizer, qee zaum nrog ib nrab ntawm kev siv zog, thiab qee zaum los ntshav pib ua ntej qhov fluidity mus txog. Thaum cov av nkos ntawm cov nplua aggregate tshaj 5%, cov dej txo tus nqi ntawm cov pob zeb sib xyaw nrogpolycarboxylate superplasticizeryuav txo qis, thiab txawm tias
fluidity yuav plam tag nrho, thiab kev poob qis ntawm kev tuav pov hwm kuj yuav tsis zoo. Rau cov ntsiab lus ntawm pob zeb hmoov, nws tseem yuav tsum tau ua cov kev ntsuam xyuas ntawm qhov chaw ob peb zaug kom tsim nyog tswj cov ntsiab lus ntawm pob zeb hmoov, kom lub rhiab heev tuaj yeem tswj tau zoo, qhov dej ntawm cov pob zeb tuaj yeem lav, thiab kev ua haujlwm ntawm pob zeb tuaj yeem ua kom zoo.
Rau cov teeb meem tam sim no ntawm cov av nkos, muaj ntau yam kev daws teeb meem:
(1) Ua kom ntau npaum li cas los yog nce qhov kev faib ua feem ntawm qeeb-tso tawm slump-retaining tus neeg saib xyuas, tab sis tswj tus nqi kom tsis txhob muaj teeb meem ntawm yellowing, los ntshav, kev sib cais, hauv qab rub thiab pob zeb retarding lub sij hawm ntev dhau lawm;
(2) Kho cov xuab zeb npaum li cas los yog ua kom cov huab cua nkag. Nyob rau ntawm qhov chaw ntawm kev ua kom muaj kev ua haujlwm zoo thiab lub zog, txo cov xuab zeb los yog ua kom cov cua nkag mus rau kom ua tiav lub hom phiaj ntawm kev nce cov dej dawb thiab slurry npaum li cas ntawm cov pob zeb. kho cov khoom ntawm pob zeb;
(3) Tsim nyog ntxiv lossis hloov cov khoom siv los daws qhov teeb meem. Cov kev sim tau pom tias ntxiv qhov tsim nyog ntawm sodium metabisulfite, sodium thiosulfate, sodium hexametaphosphate, thiab sodium sulfate rau cov dej reducer tuaj yeem txo qhov cuam tshuam ntawm cov av nkos ntawm cov pob zeb rau qee yam.
Tau kawg, cov txheej txheem saum toj no tsis tuaj yeem daws tau tag nrho cov teeb meem ntawm cov av nkos, thiab cov txiaj ntsig ntawm cov av nkos ntawm cov pob zeb ua kom ruaj khov xav tau kev tshawb fawb ntxiv, yog li cov kev daws teeb meem tseem ceeb yog txo cov av nkos ntawm cov ntaub ntawv raw.
Post lub sij hawm: May-18-2022
