Yuav ua li cas los daws qhov rhiab heev ntawm polycarboxylic acid superplasticizer rau cov ntsiab lus av nkos?

Cov ntsiab lus av nplaum hauv cov xuab zeb thiab pob zeb tuaj yeem muaj qhov cuam tshuam tsis zoo ntawm kev ua vaj tse thiab txo cov kev ua haujlwm ntawm polycarboxylate superplasticizers.Qhov laj thawj tseem ceeb yog qhov tseem ceeb ntawm polycarboxylate superplasticizer yog absorbed los ntawm cov av nplaum, txo nws cov muaj nyob rau disperse cement hais, ua rau cov neeg pluag dispersibility. Thaum cov xuab zeb muaj cov av nplaum siab, cov dej-txo tus nqi ntawm cov superplasticizer txo qis, poob qis nce, fluidity txo, thiab cov pob zeb ua rau tawg, txo lub zog, thiab txo cov kav ntev.

Cov kev daws teeb meem rau cov ntsiab lus av nplaum muaj xws li:

Ua kom ntau npaum li cas los yog qhov kev faib ua feem ntawm qeeb-tso tawm slump retention agents. Txawm li cas los xij, tus nqi yuav tsum tau tswj xyuas kom tsis txhob muaj teeb meem xws li daj, los ntshav, kev sib cais, kev rub hauv qab, thiab lub sijhawm ua vaj tse ntev heev.

Kho cov xuab zeb piv los yog nce tus nqi ntawm huab cua-entraining tus neeg sawv cev. Cov hom phiaj no kom nce cov dej dawb thiab muab tshuaj txhuam rau hauv cov pob zeb ua los ntawm kev txo cov xuab zeb sib piv lossis hloov cov ntsiab lus huab cua, yog li kho cov ntsiab lus ntawm cov pob zeb ua.

Ntxiv lossis hloov cov khoom siv los txo qhov teeb meem. Kev sim tau pom tias ntxiv cov nyiaj tsim nyog ntawm sodium metabisulfite, sodium thiosulfate, sodium hexametaphosphate, lossis sodium sulfate rau superplasticizer tuaj yeem txo qhov cuam tshuam ntawm av nplaum cov ntsiab lus rau qee yam. Txawm li cas los xij, cov hau kev saum toj no tsis tuaj yeem daws tau tag nrho cov teeb meem av nplaum, thiab vim tias cov ntsiab lus av nplaum cuam tshuam rau kev ua haujlwm ruaj khov, xav tau kev tshawb fawb ntxiv. Qhov kev daws teeb meem tseem ceeb yog txo cov av nplaum hauv cov khoom siv raw.

1.3 Compatibility Teeb meem ntawm Polycarboxylate Superplasticizers nrog rau lwm yam Cheebtsam

Xaiv cov ntaub ntawv tsim nyog rau kev tshawb fawb thiab tsim nyog sib xyaw nrog polycarboxylate superplasticizers tam sim no yog ib qho kev ntsuas loj los txhim kho superplasticizer kev ua tau zoo hauv Suav teb. Qhov kev sib xyaw no feem ntau ua rau muaj kev sib koom ua ke. Txawm li cas los xij, kev sib xyaw ntawm polycarboxylate superplasticizers nrog qee cov khoom yog xaiv tau:

Nws tsis pom zoo kom muab cov polycarboxylate superplasticizers nrog naphthalene-based superplasticizers, amino sulfonate superplasticizers, lossis melamine-based superplasticizers.

Kev sib xyaw nrog aliphatic sulfonate superplasticizers nyob rau hauv ib qho kev faib ua feem ntau tuaj yeem ua rau muaj kev sib koom ua ke. Nws raug pom zoo tias qhov kev faib ua feem ntawm aliphatic sulfonate superplasticizers yuav tsum tsis pub tshaj 7% rau kev pom zoo.

Kev sib xyaw nrog cov viscosity sib txawv ntawm cov celluloses tuaj yeem ua rau flocculent thiab precipitate, cuam tshuam cov dej tuav cov nyhuv thiab qhov tseeb ntawm cov superplasticizer.

Kev sib xyaw nrog cov retarders tej zaum yuav ua rau muaj ntxhiab tsw flocculent thiab discoloration.

Kev sib raug zoo nrog lwm cov tshuaj ntsev inorganic, xws li cov tshuaj tiv thaiv thaum ntxov thiab cov tshuaj tiv thaiv kab mob, feem ntau tsis zoo. Cov tshuaj no muaj cov dej tsis zoo thiab tsis yooj yim rau kev sib xyaw, tsim cov tshuaj oily uas ntab rau saum npoo thaum sib tov.

Yog li ntawd, thaum siv polycarboxylate superplasticizers ua ke nrog rau lwm cov khoom, nws yog ib qho tseem ceeb los xyuas kom meej qhov kev sib xyaw ua ke thiab qhov cuam tshuam tiag tiag ntawm cov pob zeb los ntawm kev sim ua ntej txiav txim siab yog tias polycarboxylate superplasticizer tuaj yeem sib xyaw nrog lwm cov khoom. Tsis tas li ntawd, lub luag haujlwm txiav txim siab ntawm leej niam cawv ntawm kev ua tau zoo ntawm superplasticizer yuav tsum tau hais txog. Nws yog ib qho tseem ceeb rau leverage cov teebmeem synergistic ntawm ntau yam additives thaum txhim kho lub multifunctionality ntawm niam cawv. Tsim cov khoom siv ntau yam siv cov khoom sib txawv nrog cov khoom sib txawv thiab cov yam ntxwv ntawm kev ua haujlwm, thiab tsim cov khoom lag luam los ntawm kev sib xyaw ua haujlwm sib txawv niam cawv, tuaj yeem ua tiav cov txiaj ntsig zoo.