polycarboxylate superplasticizer yog taw tes rau txhim kho thiab kho kev ua tiav ntawm cov pob zeb ua thiab pob zeb admixture ntawm cov khoom siv, pob zeb admixture hauv kev thov siv ntawm cov phiaj xwm muaj ntau dua thiab hnyav dua, qhov ntxiv ntawm admixture los txhim kho cov pob zeb ua kom muaj cov txiaj ntsig zoo, tab sis kev xaiv ntawm admixture, ntxiv rau txoj kev thiab hloov kom haum yuav cuam tshuam loj heev rau nws txoj kev loj hlob.
Tom qab ntxiv admixtures nyob rau hauv cov pob zeb ua, vim tias muaj ntau yam sib txawv, cov nyhuv tsim tawm kuj sib txawv, feem ntau yog los tsim lub cev, xws li adsorption nyob rau saum npoo ntawm cov nplais cement los ua cov adsorption zaj duab xis, hloov lub peev xwm, tsim ntau nqus lossis rov ua Cov. Qee tus yuav rhuav tshem cov qauv flocculation, txhim kho kev ruaj khov ntawm cov cement diffusion system, txhim kho tej yam kev mob ntawm cov cement hydration. Qee tus tuaj yeem tsim cov qauv macromolecular, hloov adsorption lub xeev ntawm saum npoo ntawm cov nplais cement, thiab qee qhov yuav txo qhov nro thiab lub zog ntawm cov dej. Ob peb yog ncaj qha rau cov tshuaj lom neeg cov tshuaj lom neeg nrog cov cement rau cov khoom sib txuas tshiab.
Vim tias polycarboxylate superplasticizer tuaj yeem txhim kho kev ua tau zoo ntawm cov pob zeb ua, thiab muaj cov txiaj ntsig zoo hauv kev lag luam, hauv ntau lub tebchaws tau siv dav dav, los ua cov khoom siv tsis tseem ceeb hauv cov pob zeb ua, tshwj xeeb tshaj yog siv cov dej txig txo tus neeg sawv cev. Cement hais tau tag nrho cov dej tawg, dej noj tau txo qis heev, cov peev xwm ua ntau cov pob zeb ua si, cov pob zeb cement yog qhov ntom, cov qauv pore thiab interface microstructure tau zoo dua, thiaj li ua kom lub cev thiab cov khoom siv ntawm cov pob zeb loj heev txhim kho, txawm hais tias nws yog impervious, los yog chloride ion diffusion, carbide, sulfate nres tsis kam. Raws li kev tiv thaiv kev cuam tshuam, hnav tiv thaiv kev ua tau zoo thiab lwm yam zoo dua li cov pob zeb tsis muaj admixtures, tsis tsuas yog txhim kho lub zog, txhim kho kev ua haujlwm, tab sis kuj txhim kho kev ua haujlwm ntawm kev ua vaj tse, tsuas yog sib xyaw nrog cov dej ua kom zoo dua qub, kev npaj ntawm kev ua haujlwm siab tsim kev sib deev, muaj lub zog loj, siab ua haujlwm ntawm kev ua haujlwm siab ntawm kev ua haujlwm siab tuaj yeem ua tiav.
