paj_banner

xov xwm

ew thiab cov kev xav tau ntau dua rau kev ua tau zoo ntawm pob zeb.Txij li kev txhawb nqa ntawm cov pob zeb sib xyaw hauv xyoo 1940, nws txoj kev loj hlob tsis tau tsuas yog hloov cov qauv sab hauv ntawm cov pob zeb tawv tawv los ntawm cov qib microscopic thiab submicroscopic, tab sis kuj hloov cov qauv ntawm cov pob zeb tshiab hauv cov txheej txheem. .Concrete admixture, tseem hu ua dispersant lossis plasticizer, yog feem ntau siv thiab tseem ceeb admixture.

Txhawm rau npaj cov pob zeb tshiab nrog cov khoom ntws zoo, cov qauv viscous uas txo qhov ntws ntawm cov cement hais yuav tsum tau disassembled, kom cov cement hais tuaj yeem tawg tag nrho hauv cov dej nruab nrab.Muaj ntau yam khoom uas cuam tshuam rau cov cement fusion, xws li cov ntxhia hauv cov cement, cov duab thiab qhov loj ntawm cov cement hais, kev ncaj ncees ntawm cov ntxhia crystallization, thiab kev ua haujlwm thiab ib puag ncig.Cov yam ntxwv saum toj no ncaj qha lossis ncaj qha tswj kev ruaj ntseg ntawm cov cement hais hauv slurry.Cov txheej txheem nruab nrab sib txawv tuaj yeem hloov pauv tus nqi ntawm cov nqi hluav taws xob ntawm cov cement hauv cov slurry, uas yog, hloov cov electrostatic repulsion ntawm cov khoom.

Thaum muaj qhov tsim nyog ntawm cov pob zeb sib xyaw ntxiv rau cov pob zeb tshiab, cov ntsiab lus ntawm cov cement particles nce, thiab hluav taws xob repulsion ntawm cov cement hais nce ntau, ua rau txo qis hauv cov viscosity ntawm cov pob zeb tshiab, uas txhawb kev ruaj ntseg ntawm tag nrho cov dispersion system.nce, thiab liquidity txhim kho.

Feem ntau, ntxiv qhov tsim nyog ntawm cov pob zeb sib xyaw rau hauv cov cement paste tuaj yeem txhawb cov pob zeb tshiab kom pom muaj zog thixotropy.Qhov no yog vim qhov tsim ntawm txheej txheej zaj duab xis nyob rau saum npoo ntawm cov cement particles adsorbed rau cov dej txo tus neeg sawv cev thiab qhov nce ntawm qhov muaj peev xwm.Yog tias muaj kev vibration me ntsis, nws yuav qhia tau zoo dua fluidity.Lub thixotropy ntawm cov pob zeb tshiab tsis muaj superplasticizer yog qhov tsis muaj zog ntau.


Post lub sij hawm: Lub Xya hli ntuj-25-2022