Cellulose ethers tau siv dav hauv cov khoom siv cement vim lawv cov khoom tshwj xeeb thiab muaj peev xwm txhim kho ntau yam ntawm kev ua haujlwm.Txawm li cas los xij, txhawm rau ua kom pom cov txiaj ntsig zoo, nws yog qhov tseem ceeb los tswj kev ua haujlwm ntawm cellulose ether hauv cov khoom cement.Daim ntawv no tshawb txog cov tswv yim tseem ceeb thiab cov tswv yim kom ua tiav kev tswj hwm ntawm cellulose ether cov khoom, kos cov kev pom los ntawm cov ntaub ntawv ntsig txog thiab kev tshawb fawb.
Nkag siab lub luag haujlwm ntawm Cellulose Ether hauv Cement Cov Khoom:
Cellulose ethers, xws li methyl cellulose (MC), hydroxyethyl cellulose (HEC), hydroxypropyl methylcellulose (HPMC), thiab lwm yam, ua lub luag haujlwm tseem ceeb hauv cov khoom cement.Lawv ua raws li dej tuav cov neeg ua haujlwm, rheological modifiers, adhesion enhancers, thiab txhim kho kev ua haujlwm, durability, thiab lwm yam khoom tseem ceeb.Nkag siab txog lub luag haujlwm tshwj xeeb thiab cov txheej txheem ntawm cellulose ether hauv cov cement systems yog qhov tseem ceeb rau kev tswj hwm kev ua tau zoo.
Kev xaiv cov hom cellulose ether tsim nyog:
Txoj kev xaiv ntawm cellulose ether hom yog qhov tseem ceeb rau kev ua tiav cov khoom xav tau hauv cov khoom cement.Txhua hom muaj cov yam ntxwv tshwj xeeb thiab kev ua haujlwm.HPMC muab ntau yam txiaj ntsig, suav nrog kev txhim kho adhesion, ua haujlwm tau zoo, thiab tuav dej.Ua tib zoo tshuaj xyuas cov kev cai tshwj xeeb ntawm koj cov khoom cement thiab xaiv hom cellulose ether uas zoo tshaj plaws raws li cov kev xav tau.
Tswj koob tshuaj thiab Particle loj:
Kev tswj cov koob tshuaj thiab qhov loj me ntawm cellulose ether yog qhov tseem ceeb kom ua tiav cov khoom xav tau hauv cov khoom siv cement.Particle loj kuj plays lub luag hauj lwm nyob rau hauv dispersibility thiab tag nrho cov kev ua tau zoo.Qhov koob tshuaj zoo tshaj plaws thiab qhov loj me tuaj yeem txiav txim siab los ntawm kev sim kev sim thiab los ntawm kev txiav txim siab tshwj xeeb rau daim ntawv thov.
Kev cuam tshuam ntawm cov cement muaj pes tsawg leeg thiab cov khoom sib xyaw:
Kev sib xyaw ntawm cov cement thiab muaj lwm cov khoom sib xyaw tuaj yeem cuam tshuam rau cov khoom ntawm cellulose ether.. Ntau hom cement, xws li Portland cement lossis cov cement sib xyaw, yuav xav tau kev hloov kho hauv cellulose ether ntau npaum li cas los yog hom kev ua haujlwm zoo..Ib yam li ntawd, muaj ntawm lwm yam admixtures xws li superplasticizers lossis air-entrainers tuaj yeem cuam tshuam nrog cellulose ethers thiab cuam tshuam rau lawv cov kev ua tau zoo..Kev nkag siab txog cov kev sib cuam tshuam thiab ua cov kev ntsuam xyuas kev sib raug zoo yog qhov tseem ceeb rau kev tswj xyuas kev ua tau zoo.
Kev Tswj Xyuas Zoo thiab Kev Xeem:
Kev ua raws li kev tswj xyuas kev tswj xyuas zoo thiab ua cov kev ntsuam xyuas tsis tu ncua yog qhov tseem ceeb los xyuas kom meej qhov ua tau zoo ntawm cellulose ether hauv cov khoom cement.. Kev tswj xyuas zoo yuav tsum suav nrog cov kev ntsuas tseem ceeb xws li viscosity, dej tuav, teeb tsa lub sijhawm, adhesion, thiab cov khoom siv kho tshuab.. kev soj ntsuam thiab saib xyuas cov kev txwv no thoob plaws hauv kev tsim khoom yuav pab txheeb xyuas qhov sib txawv thiab ua kom muaj kev hloov kho raws sijhawm kom tswj tau qhov kev xav tau.
Kev koom tes nrog cov neeg muab khoom thiab kev txhawb nqa:
Kev koom tes nrog cov neeg muab khoom siv cellulose ether thiab nrhiav kev txhawb nqa tuaj yeem muab kev nkag siab zoo thiab kev pab cuam hauv kev tswj lawv cov kev ua tau zoo hauv cov khoom siv cement.. Cov neeg siv khoom tuaj yeem muab kev taw qhia txog kev xaiv cov khoom, ntau npaum li cas optimization thiab daws teeb meem tshwj xeeb..Lawv tuaj yeem muab kev nkag mus rau cov ntaub ntawv kev, daim ntawv thov cov txheej txheem, thiab kev pab hauv kev txiav cov cellulose ether kom ua tau raws li cov cai tshwj xeeb.
Kev tswj xyuas kev ua tau zoo ntawm cov cellulose ethers hauv cov khoom cement yog ib txoj haujlwm ntau yam uas yuav tsum muaj kev nkag siab zoo ntawm lawv lub luag haujlwm, xaiv cov hom tsim nyog, kev tswj kom meej meej, kev txiav txim siab ntawm cov cement muaj pes tsawg leeg thiab cov khoom sib xyaw, kev tswj kom zoo, thiab kev sib koom tes nrog cov neeg siv khoom. .Los ntawm kev siv cov tswv yim thiab cov tswv yim no, cov tuam txhab tsim khoom tuaj yeem ua kom zoo ib yam thiab ua kom zoo ntawm cov cellulose ethers, ua rau cov khoom siv cement zoo dua qub, txhim kho durability thiab tag nrho cov neeg siv khoom txaus siab.
