Hnub Kawg Ua Ntawv Thov: 01 Nov, 2021

Cov khoom sib xyaw ua ke hauv kev npaj cov pob zeb, tsis tuaj yeem ua yam tsis muaj peb yam khoom, sib sau ua ke, hmoov thiab cov khoom ua kua.Cov khoom xyaw tseem ceeb hauv cov khoom ua kua yog dej thiab cov khoom siv ntxiv, lawv tsis yog xaiv ib feem, los ntawm lawv tus kheej qhov hnyav hnyav tuaj yeem pom, Qhov no yog qhov tseem ceeb ntawm cov pob zeb sib xyaw xav tau.Thiab kev siv cov dej txo tus neeg sawv cev hauv cov khoom sib xyaw yog nyob rau hauv txoj haujlwm tseem ceeb, yog li dab tsi yog qhov tseem ceeb ntawm cov dej txo tus neeg sawv cev? Dab tsi yog cov yam ntxwv?

Ua ntej ntawm tag nrho cov, cia peb tham txog cov feem ntau siv pob zeb dej txo tus neeg sawv cev:sodiumnaphthalenesua ulfonatehigh efficiency dej txo tus neeg sawv cev,polycarboxylic acidhigh efficiency dej txo tus neeg sawv cev thiablignin dej txo tus neeg sawv cev.

Sodiumnaphthalenesulfonate dej txo tus neeg saib xyuas: hom dej txo tus neeg sawv cev no yog cov tshuaj synthesis ntawm cov huab cua tsis zoo dej txo tus neeg sawv cev, rau cov cement particles muaj zog dispersing nyhuv, nyob rau hauv lub configuration ntawm ntws pob zeb, thiab thaum ntxov muaj zog, siab zog yuav tsum tau cam khwb cia-hauv-situ pob zeb thiab Kev tsim kho ua ntej, kev siv cov dej txo tus neeg saib xyuas muaj txiaj ntsig zoo heev. tuaj yeem txhim kho kev ua haujlwm ntawm txhua qhov ntawm cov pob zeb ua tiav.Cov pob zeb sib xyaw los ntawm hom dej txo tus neeg sawv cev yog dav siv hauv Txuas hniav, DAMS, chaw nres nkoj thiab docks, tunnels, hluav taws xob fais fab, kev txuag dej thiab kev tsim kho vaj tse thiab kev txuag ntuj.

Polycarboxylicsupperplasticizer high efficiency dej txo tus neeg saib xyuas: qhov no yog ib hom tshiab ntawm cov dej txo tus neeg saib xyuas, lub npe hu ua "zoo tagnrho" kev ua tau zoo ua vaj tse admixture, tuaj yeem tov nrog ntau yam admixtures rau hauv cov khoom siv ntau yam, xws li tus neeg sawv cev siv, tus neeg sawv cev thaum ntxov, anti-seepage tus neeg saib xyuas, coagulant.Cov dej txo tus nqi ntawm 1%polycarboxylic acid superplasticizeryog 35%, thiab lub zog thaum ntxov yog nce los ntawm ntau tshaj 50%.

Lignosulphonate siv los ua cov pob zeb txo cov dej hauv 0.2-0.3%, tuaj yeem txo cov pob zeb sib xyaw dej siv 10% -12%, txo cov dej-cement piv, txuag cov cement li 10%, txhim kho pob zeb ua haujlwm muaj peev xwm, fluidity thiab permeability kuj, txhim kho pob zeb muaj zog thiab compactness, nrog rau thaum ntxov muaj zog nyhuv, txo lub sij hawm teem, txhim kho compressive zog.Tib lub sij hawm txo cov pob zeb slump poob.

Dab tsi ntawm admixture, raws li tus neeg siv khoom tus kheej engineering xav tau los ua, peb feem ntau hais tias engineering pob zeb sib tov chaw nres tsheb muaj kev hloov pauv tau zoo dua, vim tias qhov kev xaiv ntawm cov khoom sib xyaw yog ze rau qhov project, qhov no yog vim li cas thiaj li muaj cov haujlwm loj yuav tseem nqis peev nyob rau hauv kev tsim kho ntawm qhov chaw sib tov loj thiab tsis ncaj qha mus yuav kev lag luam pob zeb.Piv txwv li, cov kev sib tw tsheb ciav hlau uas twb muaj lawm yog tsim tshwj xeeb rau cov phiaj xwm kev tsheb ciav hlau.