Dab tsi yog cov cellulose ether muaj ntawm cov khoom noj npuas?

1. Sov ntawm hydration

Raws li kev sib tw tso tawm ntawm cov cua sov ntawm cov txheej txheem sib txawv, yog ib txwm muab faib rau hauv tsib xyoos (1H thawj zaug (8H)

Cov txiaj ntsig kev sim coj ua qhia tau tias nyob rau hauv thaum ntxov theem ntawm induction (piv txwv li lub sij hawm nruab nrab ntawm cov slurry yog nce siab heev. Thaum tus nqi ntawmTus tseem ceebNce rau thaum nws yog saum 0.3%, thawj zaug extrothermic ncov ntawm slurry ncua qeeb, thiab lub ncov tus nqi maj mam txo qis dua nrog kev nce ntawm Hemc cov ntsiab lus; HEMC yuav muaj tseeb ncua lub sij hawm induction thiab lub sijhawm nrawm dua, ntau dua cov ntsiab lus nrawm dua, thiab lub sijhawm nrawm dua, thiab cov me dua cov pa nrawm dua; Cov kev hloov ntawm cellulose cov ntsiab lus tsis muaj qhov tshwm sim tsis muaj kev cuam tshuam ntawm kev ua pa ntawm kev ua kom sov li ntawm 72 teev, tab sis thaum muaj cua sov ntawm cov cement ntawm cov duab xis, xws li Daim Duab Maas, B).

Fig.3 txoj kev hloov pauv ntawm cov dej ua kom muaj cua sov tso tawm ntawm cov ntsiab lus muab tshuaj txhuam ntxiv nrog cov ntsiab lus sib txawv ntawm cellulose ether (hemc)

2. MEchanical Khoom:

Los ntawm kev kawm ob hom cellulose muaj kev pab cuam uas muaj kev pab cuam ntawm cov volified ntawm kev hloov kho cug kev sib xyaw nrog cov methyl cellulose cia li nce ntxiv nrog kev nce ntawm nws cov ntsiab lus. Lub collealive zog ntawm kev hloov kho cug kev hloov sib xyaw nrog 100000PAMACH cellwskas nce qib ib zaug thiab tom qab ntawd txo qis ntawm nws cov ntsiab lus (raws li muaj nyob hauv Daim Duab 4). Nws qhia tau tias kev sib txuam ntawm methyl cellulose ether yuav cuam tshuam txo qis compressive zog ntawm xis mas cug. Qhov ntau npaum li cas tus nqi yog, tus me dua lub zog yuav yog; Qhov me me viscosity, qhov ntau dua qhov kev cuam tshuam ntawm kev ploj ntawm cug colter compressive zog; HydroxyPropy cellulose ether thaum ntau npaum li cas noj tsawg dua 0.1%, lub zog compressive ntawm lub tshuaj khib tau nce ntxiv. Thaum cov tshuaj muaj ntau dua 0.1%, lub zog compressive ntawm lub cug kev tshuaj khib nyiab yuav txo qis nrog kev nce ntawm cov tshuaj, yog li cov tshuaj yuav tsum tau tswj hwm ntawm 0.1%.

Fig.4 3D, 7D thiab 28D Countgressive Lauj ntawm MC1, MC2 thiab MC3 hloov kho Collort

(Methyl cellulose ether, viscoSposai tau hais txog etherposylulose ether, tau hais txog cov tshuaj ntsuab, xa mus ua MC3).

3. CCov sijhawm ua haujlwm:

Los ntsuas ntsuas lub sijhawm ntawm hydroxypropyl metylropen ether nrog lub sij hawm HPMC ntau, nws tau pom tias muaj lub sijhawm HPMC, nws tau pom tias muaj lub sijhawm HOLMCOST, nws tau pom tias muaj lub sijhawm holmc Thaum cov kev xav tau yog 1%, lub sijhawm pib lub sijhawm ncav cuag 510 feeb, thiab lub sijhawm zaum kawg tau ncav 850 feeb. Piv nrog rau cov qauv khoob, thawj zaug lub sijhawm teem sijhawm txuas ntxiv los ntawm 210 feeb, thiab lub sijhawm zaum kawg tau txuas ntxiv los ntawm 470 feeb (raws li qhia hauv daim duab 5). Seb nws yog HPMC nrog viscosity ntawm 50000pa s, 100000pa s lossis lub sijhawm teem sijhawm thiab lub sijhawm pib ua haujlwm ntev nrog kev nce ntawm viscosity, raws li muaj nyob hauv daim duab 6 pom. Qhov no vim hais tias cellulose ether yog adsorbed ntawm sab ntawm Maas hais tawm, uas tiv thaiv cov dej ntawm kev hu nrog kev ua dej xis, yog li ncua kev ua dej xis. Qhov ntau dua lub viscosity ntawm cellulose ntawm cov txheej adsorption nyob rau saum npoo ntawm Maas hais, thiab ntau dua qhov ua tau zoo.

Fig.5 nyhuv ntawm cellulose cov ntsiab lus ntawm kev teeb tsa lub sij hawm cug

Fig.6 nyhuv ntawm cov chaw viscosities sib txawv ntawm HPMC ntawm lub sijhawm teem sijhawm ntawm Maas muab tshuaj txhuam

(MC-5 (500PLAMIN S), MC-10 (100000PAMA) thiab MC-20 (200000PA.))

Methyl cellulose ether thiab hydroxypropyl cellulose lub sij hawm muaj sij hawm muaj sij hawm muaj sij hawm muaj zog thiab qeeb rau cov cement slurry tom qab ua kom tawv nqaij. Nrib teeb meem.

4. Dej khaws cia:

Cov nyhuv ntawm cellulose cov ntsiab lus ntawm kev txuag dej tau kawm. Nws yog pom tias nrog kev nce cov ntsiab lus ntawm cellulose tus nqi ether ntau dua 0.6%, dej khaws cia kom ruaj khov. Txawm li cas los xij, thaum sib piv peb hom cellulose muaj kev pab hais txog ntawm 500pa s (MC-5), tus kab mob ntawm cov neeg viscosity ntawm cov dej khaws cia yog sib txawv. Kev sib txheeb ntawm cov dej khaws cia yog: MC-5.