1 Kev Taw Qhia
Cellulose ether (MC) yog siv dav hauv kev lag luam khoom siv hauv tsev thiab siv ntau ntau. Nws tuaj yeem siv los ua ib qho retarder, dej tuav tus neeg sawv cev, thickener thiab nplaum. Nyob rau hauv zoo tib yam qhuav sib tov mortar, sab nrauv phab ntsa rwb thaiv tsev mortar, self-leveling mortar, pobzeb nplaum, high-kev ua tau zoo lub tsev putty, tawg-resistant sab hauv thiab sab nrauv phab ntsa putty, waterproof qhuav sib tov mortar, gypsum plaster, caulking agent thiab lwm yam ntaub ntawv, cellulose Ethers ua lub luag haujlwm tseem ceeb. Cellulose ether muaj qhov cuam tshuam tseem ceeb ntawm kev tuav dej, dej xav tau, cohesiveness, retardation thiab kev tsim kho ntawm mortar system.
Muaj ntau ntau hom thiab specifications ntawm cellulose ethers. Feem ntau siv cellulose ethers hauv thaj chaw ntawm cov khoom siv hauv tsev muaj xws li HEC, HPMC, CMC, PAC, MHEC, thiab lwm yam, uas yog siv rau hauv cov kab sib txawv raws li lawv cov yam ntxwv. Qee tus neeg tau tshawb fawb txog kev cuam tshuam ntawm ntau hom thiab sib txawv ntawm cov cellulose ether ntawm cov cement mortar system. Kab lus no tsom mus rau lub hauv paus no thiab piav qhia yuav ua li cas xaiv ntau yam thiab cov ntsiab lus ntawm cellulose ethers hauv cov khoom sib txawv.
2 Cov yam ntxwv ua haujlwm ntawm cellulose ether hauv cement mortar
Raws li ib qho tseem ceeb admixture nyob rau hauv qhuav hmoov mortar, cellulose ether muaj ntau lub zog nyob rau hauv mortar. Lub luag haujlwm tseem ceeb tshaj plaws ntawm cellulose ether hauv cement mortar yog khaws dej thiab ua kom tuab. Tsis tas li ntawd, vim nws txoj kev sib cuam tshuam nrog cov cement system, nws tuaj yeem ua lub luag haujlwm pabcuam hauv kev nkag mus rau huab cua, kev teeb tsa rov qab, thiab txhim kho tensile daim ntawv cog lus.
Qhov tseem ceeb tshaj plaws ntawm kev ua haujlwm ntawm cellulose ether hauv mortar yog dej tuav. Cellulose ether yog siv los ua ib qho tseem ceeb admixture nyob rau hauv yuav luag tag nrho cov khoom mortar, feem ntau yog vim nws cov dej tuav. Feem ntau hais lus, cov dej tuav ntawm cellulose ether muaj feem xyuam rau nws cov viscosity, ntxiv tus nqi thiab particle loj.
Cellulose ether yog siv los ua cov thickener, thiab nws cov nyhuv thickening muaj feem xyuam rau qib etherification, particle loj, viscosity thiab hloov kho degree ntawm cellulose ether. Feem ntau hais lus, qhov siab dua qib ntawm etherification thiab viscosity ntawm cellulose ether, qhov me me, qhov pom tseeb ntawm cov nyhuv thickening. Los ntawm kev kho cov yam ntxwv saum toj no ntawm MC, mortar tuaj yeem ua tiav qhov tsim nyog los tiv thaiv kev ua haujlwm thiab qhov viscosity zoo tshaj plaws.
Hauv cov cellulose ether, kev taw qhia ntawm pab pawg alkyl txo lub zog saum npoo ntawm cov tshuaj aqueous uas muaj cov cellulose ether, kom cov cellulose ether muaj huab cua nkag rau hauv cov cement mortar. Kev nthuav qhia cov pa npuas tsim nyog rau hauv lub mortar txhim kho kev tsim kho ntawm cov mortar vim "pob nyhuv" ntawm cov pa npuas. Nyob rau tib lub sijhawm, kev taw qhia ntawm cov npuas npuas ua rau kom cov khoom tso tawm ntawm cov tshuaj khib. Tau kawg, tus nqi ntawm huab cua nkag yuav tsum tau tswj. Kev nkag mus rau huab cua ntau dhau yuav ua rau muaj kev cuam tshuam tsis zoo rau lub zog ntawm lub mortar, vim tias cov pa phem tuaj yeem raug qhia.
2.1 Cellulose ether yuav ncua cov txheej txheem hydration ntawm cov cement, yog li ua kom qeeb ntawm qhov chaw thiab cov txheej txheem ntawm cov cement, thiab ua kom lub sijhawm qhib ntawm mortar, tab sis cov nyhuv no tsis zoo rau mortar hauv thaj tsam txias dua. Thaum xaiv cellulose ether, cov khoom tsim nyog yuav tsum raug xaiv raws li qhov xwm txheej tshwj xeeb. Cov nyhuv retarding ntawm cellulose ether yog tsuas yog txuas nrog qhov nce ntawm nws cov etherification degree, hloov kho degree thiab viscosity.
Tsis tas li ntawd, cellulose ether, raws li cov saw hlau ntev ntev, tuaj yeem txhim kho kev sib raug zoo nrog cov substrate tom qab ntxiv rau hauv cov cement system nyob rau hauv qhov chaw ntawm kev tswj cov dej noo ntawm cov slurry.
2.2 Cov khoom ntawm cellulose ether nyob rau hauv mortar feem ntau muaj xws li: dej tuav, thickening, ncua sij hawm teem caij, entraining huab cua thiab txhim kho tensile bonding zog, thiab lwm yam stability, cov ntsiab lus ntawm cov khoom xyaw nquag (ntxiv tus nqi), qib ntawm etherification hloov pauv thiab nws qhov sib xws, qib kev hloov kho, cov ntsiab lus tsis zoo Cov tshuaj, thiab lwm yam. Yog li ntawd, thaum xaiv MC, cellulose ether nrog nws tus kheej cov yam ntxwv uas muaj peev xwm muab kev ua tau zoo yuav tsum raug xaiv raws li cov kev cai tshwj xeeb ntawm cov khoom mortar rau ib qho kev ua tau zoo.
3 Cov yam ntxwv ntawm cellulose ether
Feem ntau hais lus, cov lus qhia cov khoom lag luam muab los ntawm cov tuam txhab cellulose ether yuav suav nrog cov ntsuas hauv qab no: cov tsos, viscosity, qib ntawm pab pawg hloov pauv, fineness, cov ntsiab lus ntawm cov khoom siv (purity), cov ntsiab lus noo noo, cov cheeb tsam pom zoo thiab ntau npaum li cas, thiab lwm yam. Cov ntsuas kev ua tau zoo tuaj yeem cuam tshuam. ib feem ntawm lub luag haujlwm ntawm cellulose ether, tab sis thaum sib piv thiab xaiv cellulose ether, lwm yam xws li nws cov tshuaj muaj pes tsawg leeg, kev hloov kho degree, etherification degree, NaCl cov ntsiab lus, thiab DS tus nqi yuav tsum tau kuaj xyuas.
3.1 Viscosity ntawm cellulose ether
Lub viscosity ntawm cellulose ether cuam tshuam nws cov dej tuav, thickening, retardation thiab lwm yam. Yog li ntawd, nws yog ib qho tseem ceeb qhia rau kev ntsuam xyuas thiab xaiv cellulose ether.
Ua ntej sib tham txog cov viscosity ntawm cellulose ether, nws yuav tsum tau muab sau tseg tias muaj plaub txoj kev uas feem ntau siv rau kev ntsuam xyuas cov viscosity ntawm cellulose ether: Brookfield, Hakke, Höppler, thiab rotational viscometer. Cov cuab yeej siv, kev daws teeb meem thiab kev sim ib puag ncig siv los ntawm plaub txoj kev sib txawv, yog li cov txiaj ntsig ntawm tib MC tshuaj ntsuam xyuas los ntawm plaub txoj kev kuj txawv heev. Txawm tias tib txoj kev daws teeb meem, siv tib txoj kev, sim nyob rau hauv ib puag ncig sib txawv, cov viscosity
Cov txiaj ntsig kuj txawv. Yog li ntawd, thaum piav qhia txog viscosity ntawm cellulose ether, nws yog ib qho tsim nyog los qhia tias txoj kev twg yog siv rau kev sim, kev daws teeb meem, rotor, tig ceev, ntsuas kub thiab av noo thiab lwm yam kev mob ib puag ncig. Tus nqi viscosity no tseem ceeb heev. Nws tsis muaj qab hau tsuas yog hais tias "qhov viscosity ntawm MC yog dab tsi".
3.2 Khoom ruaj khov ntawm Cellulose Ether
Cellulose ethers tau paub tias muaj kev cuam tshuam los ntawm cellulosic pwm. Thaum cov fungus erodes cellulose ether, nws thawj zaug tawm tsam lub untherified qabzib unit nyob rau hauv lub cellulose ether. Raws li cov kab sib txuas, ib zaug cov piam thaj hauv tsev raug rhuav tshem, tag nrho cov saw hlau molecular tawg, thiab cov khoom viscosity yuav poob qis. Tom qab cov piam thaj hauv tsev yog etherified, cov pwm yuav tsis yooj yim corrode cov saw molecular. Yog li, qhov siab dua qhov kev hloov pauv ntawm etherification (DS tus nqi) ntawm cellulose ether, qhov siab dua nws qhov kev ruaj ntseg yuav yog.
3.3 Cov khoom xyaw nquag ntawm cellulose ether
Qhov siab dua cov ntsiab lus ntawm cov khoom xyaw nquag hauv cellulose ether, tus nqi siab dua ntawm cov khoom lag luam, yog li cov txiaj ntsig zoo tuaj yeem ua tiav nrog tib koob tshuaj. Cov khoom muaj txiaj ntsig zoo hauv cellulose ether yog cellulose ether molecule, uas yog cov organic. Yog li ntawd, thaum kuaj xyuas cov ntsiab lus zoo ntawm cellulose ether, nws tuaj yeem cuam tshuam ncaj qha los ntawm cov hmoov tshauv tom qab calcination.
3.4 NaCl cov ntsiab lus hauv cellulose ether
NaCl yog ib qho khoom lag luam uas tsis tuaj yeem ua los ntawm kev tsim cov cellulose ether, uas feem ntau yuav tsum tau muab tshem tawm los ntawm ntau qhov kev ntxuav, thiab lub sij hawm ntxuav ntau dua, NaCl tsawg dua. NaCl yog qhov paub zoo txog kev phom sij rau corrosion ntawm steel tuav thiab steel hlau mesh. Yog li ntawd, txawm hais tias kev kho cov dej phwj tuaj ntawm kev ntxuav NaCl ntau zaus tuaj yeem ua rau tus nqi nce ntxiv, thaum xaiv MC cov khoom, peb yuav tsum sim peb qhov zoo tshaj plaws los xaiv cov khoom uas muaj cov ntsiab lus qis dua NaCl.
4 Cov ntsiab cai ntawm kev xaiv cellulose ether rau cov khoom sib txawv
Thaum xaiv cellulose ether rau mortar cov khoom, ua ntej ntawm tag nrho cov, raws li cov lus piav qhia ntawm cov khoom phau ntawv, xaiv nws tus kheej Performance index (xws li viscosity, degree ntawm etherification hloov, cov ntsiab lus zoo, NaCl cov ntsiab lus, thiab lwm yam.) Cov yam ntxwv thiab kev xaiv. txoj cai
4.1 Nyias plaster system
Noj cov plastering mortar ntawm nyias plastering system ua piv txwv, txij li thaum lub plastering mortar ncaj qha mus rau sab nraud ib puag ncig, qhov saum npoo poob dej sai, yog li yuav tsum tau muaj dej tuav ntau dua. Tshwj xeeb tshaj yog thaum lub sij hawm tsim kho nyob rau hauv lub caij ntuj sov, nws yuav tsum tau hais tias lub mortar yuav zoo khaws cia noo noo nyob rau hauv high kub. Nws yuav tsum tau xaiv MC nrog cov dej khaws cia siab, uas tuaj yeem txiav txim siab los ntawm peb yam: viscosity, particle loj, thiab cov nyiaj ntxiv. Feem ntau hais lus, nyob rau hauv tib lub sijhawm, xaiv MC nrog cov viscosity siab dua, thiab xav txog cov kev xav tau ntawm kev ua haujlwm, lub viscosity yuav tsum tsis txhob siab dhau. Yog li, MC xaiv yuav tsum muaj cov dej khaws cia siab thiab qis viscosity. Ntawm cov khoom MC, MH60001P6 thiab lwm yam tuaj yeem pom zoo rau cov nplaum plastering system ntawm nyias plastering.
4.2 Cement-based plastering mortar
Plastering mortar yuav tsum tau zoo uniformity ntawm mortar, thiab nws yog yooj yim mus thov tusyees thaum plastering. Nyob rau tib lub sijhawm, nws xav tau kev ua haujlwm zoo los tiv thaiv sagging, siab twj tso kua mis, fluidity thiab workability. Yog li, MC nrog qis viscosity, dispersion sai dua thiab kev txhim kho sib xws (me me) hauv cov cement mortar raug xaiv.
Hauv kev tsim cov pobzeb nplaum, txhawm rau ua kom muaj kev nyab xeeb thiab kev ua haujlwm siab, nws yog qhov tshwj xeeb tshaj yog xav tau tias cov mortar muaj lub sijhawm qhib ntev dua thiab kev ua haujlwm zoo dua los tiv thaiv swb, thiab tib lub sijhawm yuav tsum muaj kev sib raug zoo ntawm cov substrate thiab cov pobzeb. . Yog li ntawd, cov nplais nplaum muaj cov kev xav tau siab heev rau MC. Txawm li cas los xij, MC feem ntau muaj cov ntsiab lus siab hauv cov nplaum nplaum. Thaum xaiv MC, kom ua tau raws li qhov yuav tsum tau ua ntawm lub sijhawm qhib ntev, MC nws tus kheej yuav tsum muaj cov dej tuav ntau dua, thiab cov dej tuav tus nqi yuav tsum muaj qhov tsim nyog viscosity, ntxiv cov nqi thiab qhov loj me. Txhawm rau ua kom tau raws li qhov kev ua tau zoo los tiv thaiv zawv zawg, cov nyhuv thickening ntawm MC yog qhov zoo, yog li cov mortar muaj zog ntsug ntws tsis kam, thiab cov thickening kev ua tau zoo muaj qee yam kev xav tau ntawm viscosity, etherification degree thiab particle loj.
4.4 Self-leveling av mortar
Tus kheej-leveling mortar muaj cov kev xav tau siab dua ntawm kev ua haujlwm ntawm cov tshuaj khib nyiab, yog li nws tsim nyog xaiv cov khoom uas tsis muaj viscosity cellulose ether. Txij li nws tus kheej-leveling yuav tsum tau sib npaug ntawm cov tshuaj khib nyiab tuaj yeem txiav hauv av, fluidity thiab pumpability yuav tsum tau, yog li qhov sib piv ntawm cov dej rau cov khoom loj. Txhawm rau tiv thaiv los ntshav, MC yuav tsum tau tswj cov dej tuav ntawm qhov chaw thiab muab viscosity los tiv thaiv sedimentation.
4.5 Masonry mortar
Vim hais tias lub masonry mortar ncaj qha mus rau saum npoo ntawm masonry, nws yog feem ntau ib tug tuab-txheej tsim. Lub mortar yuav tsum muaj kev ua haujlwm siab thiab tuav dej, thiab nws tseem tuaj yeem ua kom muaj kev sib raug zoo nrog cov masonry, txhim kho kev ua haujlwm, thiab ua kom muaj txiaj ntsig. Yog li ntawd, tus MC xaiv yuav tsum muaj peev xwm pab cov mortar los txhim kho cov kev ua tau zoo saum toj no, thiab cov viscosity ntawm cellulose ether yuav tsum tsis txhob siab dhau.
4.6 rwb thaiv tsev slurry
Txij li cov thermal rwb thaiv tsev slurry feem ntau yog siv los ntawm tes, nws yuav tsum tau xaiv MC tuaj yeem muab cov mortar zoo ua haujlwm, ua haujlwm zoo thiab tuav dej zoo. MC kuj yuav tsum muaj cov yam ntxwv ntawm siab viscosity thiab siab cua nkag.
5 Kev xaus
Kev ua haujlwm ntawm cellulose ether hauv cement mortar yog dej tuav, thickening, cua nkag, retardation thiab txhim kho tensile daim ntawv cog lus lub zog, thiab lwm yam.
Post lub sij hawm: Jan-30-2023