Tam sim no, daim ntawv thov ntawm polycarboxylic cov dej ua tau zoo siab hauv kev ua vaj tse ntau lawm thiab kev tsim vaj tsev tsim khoom hauv Suav teb tau ua ntau dua thiab loj dua thiab paub tab, thiab cov khoom lag luam polycarboxylic acid tau luam tawm ib qho dhau ib qho, thiab tau txais kev txhawb nqa thiab siv. Hauv kev pom txog cov teeb meem hauv kev siv polycarboxylic kev ua haujlwm siab ua dej tsim ua pob zeb ua rau cov chaw tsim khoom ua vaj tse, R & amp; D cov neeg ua haujlwm ntawm cov lag luam ntxiv tau kuj tau ua kev tshawb fawb ntau, thiab tom qab ua tiav cov txheej txheem kev ua dej tshiab. Nrog kev tshawb nrhiav qhov tob ntxiv ntawm cov pob zeb ua vaj tse admixtures, qhov kev txhim kho yav tom ntej ntawm cov pob zeb admixtures yuav nyob rau hauv cov kev coj ua ntawm admixtures. Txhawm rau kom nkag siab zoo dua cawv ntawm yam sib txawv ntawm kev ua haujlwm ntawm Polycarboxylic Dej tsim cov dej, daim ntawv no kawm txog kev cuam tshuam ntawm cov ntaub ntawv nyoos thiab kev khaws cia ntawm kev ua haujlwm thiab lub zog ntawm cov qhob, thiaj li muab qee qhov kev sim rau kev tshawb fawb ntawm Polycarboxylic Dej tus txo hwj chim.
1. Qhov pib ua kom tau zoo ntawm cov cement muab sib xyaw nrog polycarboxylate superplasticizer JH35 sib txuas los ntawm plaub yam ntawm tus qauv tsim peb theem muaj qhov sib txawv me me. Los ntawm cov ntau yam R, nws tuaj yeem pom tias tus yam ntxwv ntawm ntau yam cuam tshuam ntawm kev pib fluidity ntawm MAAs muab tshuaj txhuam thaum JH35 hluav taws xob tsis tseem ceeb tshaj li qhov uas thaum JH9 thiab JH23 yog synthesized, thiab cov nyhuv yog me ntsis ntau dua li ntawd thaum AA yog synthesized Cov.
2. Qhov cuam tshuam ntawm superplasticizer synthesized nrog cov mis zoo dua ntawm kev nyeem ntawm fluidity ntawm cov muab tshuaj txhuam MAAs yog cuam tshuam nrog nws cov qauv molecular thiab morphology. Lub fluidity poob ntawm cov cement muab tshuaj yog feem ntau cuam tshuam nrog qhov peb-seem rov tsuj ntawm cov roj molecular adsorbent txheej ntawm superplasticizer nyob rau saum npoo ntawm cov nplais cement.
3. Rau lub polycarboxylic superplasticizer, lub tshuab ntawm kev tswj cov dispersion ntawm MAAs muab tshuaj yog tias lub saw sab ntawm polyether hauv lub superplasticizer molecule txuas nrog cov saw tseem ceeb hauv daim ntawv ntawm ester bond, uas yog decomposed nyob rau hauv alkaline ib puag ncig, tso carboxyl maj mam , thiab ntxiv cov khoom siv electrostatic repulsion yuam ua yeeb yam ntawm cov cement ob zaug, kom qhov poob ntawm cov cement paste fluidity tuaj yeem tswj tau zoo. Txheej Txheem.
Thaum peb nkag siab txog kev tsim cov txheej txheem ntawm Super Polycarboxylic Dej tsim kom muaj dej, thaum ntau npaum ntawm superplasticizer ntau dua 0.5%, thawj qhov kev npliag ntawm cov xis mas muab tso tawm nce thiab qeeb nrog qhov nce ntawm superplasticizer ntau npaum. Cov txiaj ntsig pom tau tias cov ntsiab lus khov ntawm cov polycarboxylic superplasticizer yog 0.5-0.8% ntawm cov cement zoo.
