Hnub Kawg: 15 Lub Xya Hli, 2024
1. Cov pob zeb uas muaj fluidity siab yog ua rau delamination thiab cais.
Feem ntau, cov pob zeb ua kom muaj kuab heev uas tau npaj nrog cov tshuaj tua kab mob polycarboxylic acid-raws li dej yuav tsis ua rau los ntshav hauv cov pob zeb sib tov txawm tias tus nqi ntawm cov dej-txo tus neeg saib xyuas thiab cov dej haus tau tswj tau zoo, tab sis nws yog qhov yooj yim heev los tshwm sim. Stratification thiab segregation phenomena yog manifested nyob rau hauv lub sinking ntawm ntxhib aggregate thiab lub floating ntawm mortar los yog ntshiab slurry. Thaum hom kev sib xyaw ua ke no yog siv rau pouring, delamination thiab cais tawm yog pom tseeb txawm tias tsis muaj kev vibration.
Qhov laj thawj feem ntau yog vim qhov txo qis hauv viscosity ntawm slurry thaum lub fluidity ntawm cov pob zeb sib xyaw nrog polycarboxylic acid-raws li dej-txo tus neeg sawv cev siab. Tsim nyog compounding ntawm thickening Cheebtsam tsuas yog daws tau qhov teeb meem no rau ib tug tej yam, thiab compounding ntawm thickening Cheebtsam feem ntau ua rau cov tshuaj tiv thaiv ntawm tiag txo cov dej-txo cov nyhuv.
2. Thaum siv nrog rau lwm hom dej txo cov neeg ua haujlwm, tsis muaj cov nyhuv superimposed.
Yav dhau los, thaum npaj cov pob zeb, hom twj tso kua mis tuaj yeem hloov pauv raws li qhov xav tau, thiab cov khoom ntawm cov pob zeb sib xyaw yuav tsis txawv heev ntawm cov txiaj ntsig hauv chav kuaj, thiab yuav tsis muaj kev hloov tam sim ntawm cov khoom ntawm cov pob zeb sib xyaw. .
Thaum polycarboxylic acid-raws li dej-txo cov neeg ua haujlwm tau siv ua ke nrog lwm hom dej-txo cov neeg ua haujlwm, nws yog ib qho nyuaj kom tau txais cov teebmeem superimposed, thiab kev sib nrig sib solubility ntawm polycarboxylic acid-raws li dej-txo tus neeg saib xyuas thiab lwm hom dej- txo tus neeg sawv cev daws teeb meem yog qhov tsis zoo.
3. Tsis muaj kev hloov kho tom qab ntxiv cov khoom hloov kho uas nquag siv.
Tam sim no, muaj kev nqis peev me me hauv kev tshawb fawb tshawb fawb ntawm polycarboxylic acid-raws li dej-txo cov neeg ua haujlwm. Feem ntau, lub hom phiaj ntawm kev tshawb fawb tshawb fawb tsuas yog txhawm rau txhim kho nws cov plasticizing thiab txo cov dej. Nws yog qhov nyuaj los tsim cov qauv molecular raws li kev xav tau ntawm engineering sib txawv. Ib tug series ntawm polycarboxylic acid-raws li dej txo cov neeg ua hauj lwm nrog txawv retarding thiab accelerating teebmeem, tsis muaj cua-entraining los yog txawv huab cua-entraining zog, thiab sib txawv viscosities yog synthesized. Vim muaj ntau haiv neeg thiab tsis ruaj khov ntawm cov cement, admixtures, thiab aggregates nyob rau hauv tej yaam num, nws yog ib qho tseem ceeb heev rau admixture manufacturers thiab lwm tus neeg rau compound thiab hloov polycarboxylate dej-txo admixture khoom raws li qhov project xav tau.
Tam sim no, cov kev ntsuas rau kev hloov pauv ntawm cov dej-txo cov neeg ua haujlwm yog nyob ntawm qhov kev hloov kho ntawm cov tshuaj txo cov dej xws li lignosulfonate series thiab naphthalene series high-efficiency dej-txo cov neeg ua haujlwm. Kev ntsuam xyuas tau ua pov thawj tias yav dhau los kev hloov kho kev ntsuas tsis tas yuav tsim nyog rau polycarboxylic acid-raws li dej txo cov neeg ua haujlwm. Piv txwv li, ntawm cov khoom siv retardant siv los hloov cov tshuaj naphthalene-raws li dej-txo, sodium citrate tsis haum rau polycarboxylic acid-raws li dej-txo cov neeg ua haujlwm. Tsis tsuas yog nws tsis muaj cov nyhuv retarding, nws yuav ua rau kom coagulation, thiab sodium citrate tov Cov miscibility nrog polycarboxylic acid-raws li dej txo cov neeg ua haujlwm kuj tsis zoo heev.
Tsis tas li ntawd, ntau hom defoaming agents, air-entraining agents thiab thickeners tsis haum rau polycarboxylic acid-raws li dej txo cov neeg ua haujlwm. Los ntawm cov kev ntsuam xyuas thiab kev soj ntsuam saum toj no, nws tsis yog qhov nyuaj kom pom tias vim qhov tshwj xeeb ntawm cov qauv molecular ntawm polycarboxylic acid-raws li dej txo cov neeg ua haujlwm, raws li qhov tob ntawm kev tshawb fawb tshawb fawb thiab tsub zuj zuj ntawm engineering daim ntawv thov kev paub nyob rau theem no, qhov cuam tshuam. ntawm polycarboxylic acid dej-txo cov neeg sawv cev ntawm polycarboxylic acid-raws li superplasticizers los ntawm lwm yam chemical Cheebtsam Tsis muaj ntau txoj hauv kev los hloov cov dej-txo cov neeg ua hauj lwm, thiab vim yog cov kev xav thiab cov qauv tsim yav dhau los rau kev hloov kho ntawm lwm hom dej-txo. cov neeg ua haujlwm, kev tshawb nrhiav tob thiab kev tshawb fawb yuav xav tau rau cov tshuaj polycarboxylate-raws li dej-txo cov neeg ua haujlwm. Ua kev kho thiab ntxiv.
4. Kev ua haujlwm ruaj khov ntawm cov khoom tsis zoo.
Tsis muaj ntau lub tuam txhab tsim cov dej-txo tus neeg sawv cev tuaj yeem raug suav tias yog cov tuam txhab tshuaj zoo. Ntau lub tuam txhab tsuas yog nyob rau hauv thawj theem ntawm kev tov khoom thiab ntim tshuab, thiab cov khoom lag luam raug txwv los ntawm qhov zoo ntawm cov masterbatch. Raws li kev tswj hwm kev tsim khoom muaj kev txhawj xeeb, qhov tsis ruaj khov ntawm qhov chaw thiab qhov zoo ntawm cov khoom siv raw khoom ib txwm yog qhov tseem ceeb uas cuam tshuam qhov kev ua tau zoo ntawm polycarboxylic acid-based superplasticizers.
Post lub sij hawm: Lub Xya hli ntuj-15-2024
