Yuav ua li cas xaiv hydroxypropyl methylcellulose rau plaster mortar?

Tus nqi pH dav dav ntawm cov khoom gypsum yog acidic lossis nruab nrab. Tam sim no muaj ob hom kev tsim kho qibHydroxypropyl methylcellulose yog tsim los ntawm cov tshuajntawm kev ua lag luam: qeeb-solving cellulose thiab instant cellulose (S). Instant cellulose tsis haum rau gypsum systems. Cov khoom, lub solubility tsis zoo nyob rau hauv acidic los yog nruab nrab tej yam kev mob, thiab slow-dissolving hydroxypropyl methylcellulose yuav yaj nyob rau hauv gypsum cov khoom, tab sis qeeb-solub cellulose muaj ib tug tseem ceeb disadvantage, nws yog ib qho yooj yim mus agglomerate (thaum gypsum tom qab lub mortar yog nplawm rau ntawm phab ntsa rau ib lub sij hawm luv luv, me me yuav tshwm sim ntawm cov pob zeb me me). Tam sim no, nyob rau hauv cov khoom gypsum, tshwj xeeb tshaj yog nyob rau hauv lub tshuab-txhaj tshuaj gypsum mortar, nws yuav tsum tau hais tias cellulose ether yuav tsum tau tag nrho dispersed thiab yaj nyob rau hauv ib tug luv luv lub sij hawm, uas yuav tsum tau peb mus ua hauj lwm nyob rau hauv-tob tshawb fawb ntawm qeeb-solving cellulose ether txheej txheem ntau lawm. Kev kho deg (tsis yog qhov sib ntxiv ntawm lwm cov tshuaj ntxiv hauv qib cellulose ether), kom hloov mus rau gypsum mortar system. Hydroxypropyl methylcellulose ether nrog kev sib sib zog nqus saum npoo tuaj yeem muaj lub sijhawm tawg ruaj khov thiab cov khoom siv zoo hauv gypsum mortar, thiab tuaj yeem txhim kho qib thiab ua tiav cov txheej txheem ntawm mortar.

Lub tshuab txau gypsum mortar feem ntau siv cov viscosity qis hydroxypropyl methylcellulose ether ntawm 20,000 thiab 75,000, thiab cov nyiaj ntxiv feem ntau yog 0.2% rau 0.4%. Lub sijhawm teeb tsa ntawm lub tshuab-txhaj tshuaj gypsum mortar yog tswj ntawm li 1 teev. Peb siv gypsum mortar yield stress, yas viscosity, thixotropy, rheology thiab sib xws ntawm slurry los txiav txim qhov kev ua tau zoo ntawm gypsum mortar khoom.

Peb xav txog kev tswj xyuas qhov zoo ntawm desulfurization gypsum qhov chaw calcining txheej txheem, cov khoom ntim (cement, nplua aggregate, hnyav calcium hmoov) thiab cov khoom sib xyaw (yuav siv tau rau hauv disperse latex hmoov, hydroxypropyl methyl cellulose ether, nthuav perlite, gypsum retarder) Kev xaiv ntawm tag nrho cov khoom formula raug nqi zoo.

Hydroxypropyl methyl cellulose etherrau gypsum mortar muaj siab purity thiab zoo workability, thiab tau dav qhuas los ntawm cov neeg muas zaub gypsum mortar.