Qhov sib txawv ntawm Plasticizer thiab Superplasticizer

Plasticizers thiab superplasticizers yog ob hom tshuaj additives siv hauv cov pob zeb sib tov los txhim kho kev ua haujlwm, txo cov ntsiab lus dej, thiab txhim kho qee yam khoom ntawm pob zeb. Txawm li cas los xij, lawv txawv ntawm lawv cov txheej txheem ntawm kev ua thiab cov txiaj ntsig tshwj xeeb uas lawv muab. Nov yog qhov sib txawv tseem ceeb ntawm plasticizers thiab superplasticizers:

1. Mechanism ntawm Action:
   • Plasticizers: Plasticizers yog cov dej-soluble organic compounds uas cuam tshuam nrog cov cement hais, txo cov interparticle attraction rog thiab txhim kho cov dispersion ntawm cement hais nyob rau hauv cov mix. Lawv ua haujlwm feem ntau los ntawm lubricating cov khoom, uas tso cai rau kom muaj ntau dua fluidity thiab yooj yim tuav ntawm cov pob zeb sib tov.
   • Superplasticizers: Superplasticizers, tseem hu ua high-range water reducers (HRWR), yog cov dej-txo cov neeg ua haujlwm zoo uas cuam tshuam cov cement hais ntau dua li cov yas. Lawv ua hauj lwm los ntawm adsorbing mus rau saum npoo ntawm cov cement hais thiab tsim ib zaj duab xis nyias, uas ua rau muaj zog repulsive quab yuam ntawm cov khoom, yog li txo cov dej-rau-cement ratio yam tsis muaj kev cuam tshuam kev ua haujlwm.
2. Dej txo:
   • Plasticizers: Plasticizers feem ntau txo cov dej ntawm cov pob zeb sib tov los ntawm 5% mus rau 15% thaum tswj kev ua haujlwm.
   • Superplasticizers: Superplasticizers tuaj yeem ua tiav cov dej txo qis dua, feem ntau nyob rau hauv thaj tsam ntawm 20% mus rau 40%, tso cai rau kev txhim kho tseem ceeb hauv kev ua vaj tse, ua haujlwm ntev, thiab kev ua haujlwm.
3. Noj ntau npaum:
   • Plasticizers: Plasticizers feem ntau yog siv qis dua piv rau superplasticizers vim lawv cov peev xwm txo qis dej.
   • Superplasticizers: Superplasticizers xav tau ntau npaum li cas kom ua tiav cov dej uas xav tau thiab feem ntau siv ua ke nrog lwm cov khoom siv los ua kom zoo dua.
4. Qhov cuam tshuam rau kev ua haujlwm:
   • Plasticizers: Plasticizers feem ntau txhim kho kev ua haujlwm thiab ntws ntawm cov pob zeb sib tov, ua kom yooj yim rau qhov chaw, compact, thiab ua tiav.
   • Superplasticizers: Superplasticizers muab cov txiaj ntsig zoo sib xws rau plasticizers tab sis tuaj yeem ua tiav qib siab ntawm kev ua haujlwm thiab ntws, tso cai rau kev tsim cov kua dej ntau thiab nws tus kheej sib xyaw ua ke.
5. Daim ntawv thov:
   • Plasticizers: Plasticizers feem ntau yog siv nyob rau hauv ntau hom kev siv pob zeb uas txhim kho kev ua haujlwm thiab kev yooj yim ntawm kev tuav yog xav tau, xws li cov pob zeb sib xyaw ua ke, cov pob zeb ua ntej, thiab cov phom sij.
   • Superplasticizers: Superplasticizers feem ntau yog siv rau hauv kev sib xyaw ua ke uas muaj zog, ua haujlwm ntev, thiab cov yam ntxwv ntws, xws li hauv cov tsev siab, txuas hniav, thiab cov phiaj xwm kev tsim kho.

Hauv cov ntsiab lus, thaum ob qho tib si plasticizers thiab superplasticizers tau siv los txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm cov pob zeb sib tov, superplasticizers muaj peev xwm txo cov dej ntau dua thiab feem ntau siv rau hauv cov ntawv thov kev ua haujlwm siab uas tshwj xeeb lub zog, durability, thiab flowability tseem ceeb heev.