Hnub Kawg:19, Peb,2024
Txoj kev tsim kho nta:
(1) Thaum tsim cov pob zeb sib xyaw ua ke, kev sib xyaw ua ke ntawm cov dej-txo cov neeg ua haujlwm siab thiab tus neeg saib xyuas huab cua daws cov kev xav tau ntawm cov pob zeb ua vaj tse nyob rau hauv qhov chaw txias heev;
(2) Los ntawm kev sib koom ua ke cov khoom pov tseg rau hauv cov khoom siv dej-txo qis, qhov cuam tshuam ntawm qhov kub thiab txias nyob rau lub caij ntuj sov ntawm kev ua haujlwm ntawm cov pob zeb yog daws;
(3) Los ntawm kev sim tshuaj ntsuam xyuas, kev cuam tshuam ntawm cov av nkos hauv pob zeb ntawm kev ua haujlwm thiab compressive zog ntawm pob zeb;
(4) Los ntawm kev sib xyaw cov xuab zeb ntxhib thiab cov xuab zeb zoo hauv ib qho kev faib ua feem, qhov tshwm sim uas ib hom pob zeb tsis tuaj yeem ua tau raws li kev ua haujlwm ntawm pob zeb;
(5) Cov yam ntxwv uas cuam tshuam rau kev ua tau zoo ntawm cov pob zeb tau piav qhia, thiab qhov cuam tshuam ntawm qhov tsis zoo ntawm kev ua haujlwm ntawm cov pob zeb raug zam thaum lub sij hawm kev tsim ua vaj tse.
Lub hauv paus ntsiab lus ua haujlwm ntawm kev ua haujlwm siab dej txo tus neeg sawv cev:
(1) Dispersion: Cov dej-txo tus neeg sawv cev yog directionally adsorbed rau saum npoo ntawm cov cement hais, ua rau lawv nqa tib lub nqi los tsim electrostatic repulsion, uas txhawb cov cement hais kom tawg mus rau ib leeg, rhuav tshem cov qauv flocculation tsim los ntawm cov khoom siv hluav taws xob. cement slurry, thiab tso ib feem ntawm cov dej qhwv. Ua kom muaj txiaj ntsig ua kom lub cev fluidity ntawm pob zeb sib tov.
(2) Lubricant nyhuv: Cov dej-txo tus neeg sawv cev muaj ib pab pawg neeg hydrophilic muaj zog heev, uas tsim ib zaj duab xis dej nyob rau saum npoo ntawm cov cement hais, txo cov zawv zawg tsis kam ntawm cov cement hais, yog li ntxiv dag zog rau lub fluidity ntawm cov pob zeb.
(3) Steric hindrance: Cov dej-txo tus neeg sawv cev muaj hydrophilic polyether sab chains, uas tsim ib tug hydrophilic peb-dimensional adsorption txheej nyob rau saum npoo ntawm cov cement hais, ua rau steric hindrance ntawm cov cement hais, yog li xyuas kom meej tias cov pob zeb muaj cov khoom zoo. poob.
(4) Slow-tso nyhuv ntawm grafted copolymerized ceg: Thaum lub sij hawm tsim thiab npaj cov txheej txheem ntawm cov tshiab dej-txo cov neeg ua hauj, branched chains nrog tshwj xeeb functions yog ntxiv. Cov saw caj dab no tsis tsuas yog muaj cov nyhuv steric hindrance, tab sis kuj tuaj yeem siv thaum lub sij hawm muaj dej ntau ntawm cov cement. Polycarboxylic acids nrog cov teebmeem dispersing raug tso tawm nyob rau hauv ib qho chaw alkaline, uas txhim kho cov nyhuv dispersion ntawm cov cement hais thiab zoo tswj cov slump poob ntawm pob zeb nyob rau hauv ib lub sij hawm ntawm lub sij hawm.
Lub sij hawm xa tuaj: Feb-19-2024
