Lub Txee Lub neej ntev npaum li cas ntawm Polycarboxylic Superplasticizer?

Polycarboxylic superplasticizer, raws li cov khoom muaj txiaj ntsig zoo thiab ib puag ncig tus phooj ywg, tau qhib tshooj tshiab hauv kev lag luam pob zeb ua ke, tso cai rau cov pob zeb superplasticizers txav deb ntawm lub sijhawm ntawm naphthalene-based superplasticizers, uas muaj kuab paug thiab muaj zog tsawg. Kev koom ua ke ntawm polycarboxylic superplasticizer rau hauv pob zeb txhim kho nws cov kav ntev. Dab tsi yog txoj hauv kev cia rau superplasticizers? Polycarboxylic superplasticizer tuaj yeem txhim kho kev ruaj ntseg ntawm pob zeb thiab muaj kev tiv thaiv sulfate corrosion. Txhua yam khoom muaj lub neej txee, yog li lub txee lub neej ntawm polycarboxylic superplasticizer ntev npaum li cas?

Lub txee lub neej ntawm polycarboxylic acid niam cawv yog 12 lub hlis, thiab nws yuav tsum muab cia rau hauv qhov chaw txias, qhov cua. Rau cov khoom sib xyaw, lub txee lub neej feem ntau yog 6 lub hlis. Yog tias nws dhau lub txee lub neej, nws yuav tsum tau sim ua ntej thiab siv tsuas yog tias nws dhau qhov kev sim.

Txhawm rau txuas ntxiv lub neej txee, me me ntawm cov khoom khaws cia (xws li formaldehyde lossis acetone) tuaj yeem ntxiv kom nws txuas ntxiv los ntawm ob peb lub hlis. Tom qab sib xyaw polycarboxylic acid, lub txee lub neej yuav luv dua, tshwj xeeb tshaj yog thaum sib xyaw nrog cov khoom ntxiv uas muaj suab thaj lossis cawv.

Concrete admixtures tau dhau los ua 5 yam tseem ceeb hauv kev ua vaj tse. Saib ntawm txoj kev loj hlob ntawm ob qho tib si pob zeb thiab superplasticizers, nws tuaj yeem pom tias ob qho tib si tau txhawb kev loj hlob ntawm ib leeg. Txoj kev loj hlob ntawm hom tshiab ntawm cov khoom sib xyaw ua ke tau ua tiav cov cuab yeej ua vaj tse, thaum kev siv cov khoom siv hluav taws xob ua tau zoo tau dhau los ua ib qho tseem ceeb hauv kev tsim cov cuab yeej cuab tam. Naphthalene-raws li superplasticizers tsim los ntawm Nyiv Kao Corporation thiab melamine-formaldehyde-based superplasticizers tsim nyob rau hauv lub teb chaws Yelemees yog cov piv txwv tseem ceeb. Polycarboxylic superplasticizer muaj cov dej txo qis thiab cov teebmeem thaum ntxov. Nws cov txheej txheem ntawm kev txiav txim, ntxiv rau dispersive adsorption, kuj suav nrog electrostatic repulsion los ntawm adsorbed ob txheej hluav taws xob. Polycarboxylic superplasticizer muaj cov dej-txo qis, uas tuaj yeem txhawb cov tshuaj tiv thaiv dej thaum ntxov. Cov khoom hydration sai tso rau saum npoo ntawm cov cement hais, txo cov Zeta muaj peev xwm, yog li txhim kho cov dej ntws ntawm cov pob zeb sib tov, thaum tseem txhim kho qhov ua tau zoo ntawm cov pob zeb. Cov pob zeb ua haujlwm siab, cov twj tso kua mis, thiab cov pob zeb muaj zog tuaj yeem tsim tau, uas yog qhov tseem ceeb heev rau cov pob zeb loj loj, cov qauv hauv ntug dej hiav txwv, cov khoom siv lub teeb-hnyav high-strength, thiab prefabricated Cheebtsam.

Polycarboxylic superplasticizer yog ib qho khoom sib xyaw uas tuaj yeem txo cov dej sib xyaw ua ke hauv tib qho kev sib tsoo ntawm cov pob zeb, tab sis nws yog qhov ua rau kev puas tsuaj thaum siv. Yog li ntawd, nws yog ib qho tseem ceeb kom khaws nws kom raug:

Txij li thaum polycarboxylic superplasticizer yog cov kua, nws yuav tsum tau muab cia rau hauv nruas rau kev thauj mus los.

Raws li polycarboxylic superplasticizer yog cov khoom siv tshuaj, nws yuav tsum muab cia rau hauv qhov chaw txias, qhuav, deb ntawm tshav ntuj ncaj qha. Txwv tsis pub, nws yuav evaporate los yog deteriorate. Thaum lub caij ntuj no, nws yog ib qho tseem ceeb kom ntseeg tau tias nws khaws cia rau hauv qhov chaw uas muaj qhov sov so txaus kom tsis txhob khov.

Los ntawm cov lus piav qhia saum toj no, peb tuaj yeem nkag siab lub txee lub neej ntawm polycarboxylic superplasticizer. Hauv qhov kub thiab txias, nws tuaj yeem ua kom khov, tab sis tom qab ua kom sov thiab nplawm, nws qhov kev ua tau zoo tuaj yeem rov qab los yam tsis muaj kev cuam tshuam rau nws qhov zoo.