Daim Ntawv Thov Hydroxyethyl Methyl Cellulose Hauv Cov Tshuaj Tsuag

Hydroxyethyl Methyl Cellulose (HEMC)yog cov cellulose ether uas yaj tau hauv dej uas tsis yog ionic nrog cov khoom ua kom tuab zoo, khaws dej, lubricity thiab cov khoom ua zaj duab xis. Nws yog siv dav hauv cov ntaub ntawv tsim kho, cov tshuaj pleev xim, cov tshuaj txhua hnub thiab lwm yam teb. Nyob rau hauv xyoo tas los no, nrog rau kev txhim kho ntawm kev lag luam hauv tsev thiab kev siv tshuab hauv kev tsim kho, cov tshuaj tsuag tau maj mam hloov cov kev tsim kho plastering ib txwm muaj thiab dhau los ua ib hom tshiab ntawm kev tsim kho zoo thiab ib puag ncig zoo. Kev siv HEMC hauv cov tshuaj tsuag tau txhim kho kev ua haujlwm tsim kho thiab cov khoom tiav zoo ntawm cov tshuaj tsuag, thiab yog ib qho ntawm cov khoom ntxiv tseem ceeb hauv daim teb no.

1. Kev Txheeb Xyuas Txog Cov Tshuaj Tsuag

Cov tshuaj tsuag yog cov tshuaj tsuag uas tau sib xyaw ua ntej los ntawm cov khoom siv txau, suav nrog cov tshuaj tsuag plastering, cov tshuaj tsuag thermal insulation, cov tshuaj tsuag self-leveling thiab lwm yam. Piv nrog rau kev tsim kho tes ib txwm muaj, cov tshuaj tsuag muaj qhov zoo ntawm kev ua haujlwm sai, kev siv zog tsawg, kev tsim kho ruaj khov, thiab tsim nyog rau kev ua haujlwm hauv thaj chaw loj. Txawm li cas los xij, vim yog cov txheej txheem txau ceev thiab txuas ntxiv mus, qhov yuav tsum tau ua haujlwm siab dua, kev nplaum thiab kev khaws dej ntawm cov tshuaj tsuag.

2. Cov yam ntxwv ntawm HEMC

Hydroxyethyl methylcellulose muaj ob qho tib si hydroxyethyl thiab methoxy functional pawg, uas muab nws cov khoom zoo heev hauv qab no:

Kev yaj dej zoo heev thiab ruaj khov: HEMC yaj sai sai hauv dej txias los ua cov kua pob tshab lossis pob tshab, uas haum rau ntau yam kev sib xyaw ua ke qhuav.

Kev khaws dej zoo: Nws cov qauv molecular tuaj yeem kaw cov dej noo, tiv thaiv cov dej noo kom tsis txhob evaporate sai dhau, thiab txhim kho qhov lubricity thiab adhesion ntawm mortar thaum lub sijhawm tsim kho.

Txhim kho kev nplaum thiab tiv thaiv kev sagging: HEMC muab lub zog sib txuas thiab viscosity kom tsim nyog los tiv thaiv cov mortar los ntawm sagging tom qab txau.

Txhim kho kev ua haujlwm ntawm kev tsim kho: Ua kom cov mortar du thaum lub sijhawm txau, twj thiab theem, thiab txhim kho kev ua haujlwm ntawm kev tsim kho.

Ruaj khov rau qhov kub thiab txias, kua qaub thiab alkali: Haum rau ntau yam xwm txheej ib puag ncig kom ntseeg tau tias kev ua haujlwm ntawm cov mortar ruaj khov.

3. Lub luag haujlwm tshwj xeeb ntawm HEMC hauv cov tshuaj tsuag

3.1. Txhim kho cov khoom siv rheological ntawm kev tsim kho

Qhov ua haujlwm tau ntawm cov tshuaj tsuag yuav tsum tau kom nws muaj qhov fluidity zoo thiab ruaj khov thixotropy. HEMC tuaj yeem kho qhov sib xws ntawm cov tshuaj tsuag, ua rau nws yooj yim rau twj thiab tsuag. Tib lub sijhawm, nws tuaj yeem ua kom tuab sai tom qab tsuag rau ntawm phab ntsa, txhim kho kev ua haujlwm tiv thaiv kev poob qis, thiab xyuas kom meej tias cov tshuaj tsuag npog sib npaug thiab cov tuab ntawm kev tsim kho.

3.2. Txhim kho kev khaws dej thiab ntev lub sijhawm qhib

Thaum lub sijhawm txau, dej yooj yim ua pa sai, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias lossis qhov cua nkag, uas tuaj yeem ua rau cov pob zeb tawg lossis tsis sib txuas zoo. HEMC qhov kev ua haujlwm zoo ntawm kev khaws dej kom zoo qeeb qeeb dej poob, ua kom ntseeg tau tias cov cement thiab lwm yam khoom siv cementitious tau hydrated tag nrho, thiab txhim kho lub zog sib txuas ntawm cov pob zeb thiab lub hauv paus. Tib lub sijhawm, kev ncua sijhawm qhib yog qhov zoo rau kev sib npaug lossis ua tiav tom qab, thiab txhim kho kev ywj pheej ntawm kev tsim kho.

3.3. Txhim kho kev tiv thaiv kev sagging thiab kev sib txuas

Thaum tsim kho rau ntawm cov chaw ntsug lossis phab ntsa siab, yog tias cov mortar kua dhau, nws yooj yim rau sag, cuam tshuam rau qhov tsos thiab kev tswj qhov tuab. HEMC ua rau viscosity thiab cohesion ua rau cov mortar muaj thixotropy zoo, uas yog, nws muaj fluidity zoo thaum raug lub zog (twj lossis txau), sai sai rov qab sib xws thaum nres, lo rau ntawm phab ntsa, thiab tiv thaiv kom tsis txhob sag.

3.4. Txhim kho qhov ruaj khov ntawm cov mortar

HEMC tuaj yeem tswj qhov kev sib kis ntawm cov ntaub ntawv cementitious thiab aggregates hauv lub cev mortar, tiv thaiv kev sib cais thiab dej ntws, xyuas kom meej tias cov khoom sib xyaw mortar sib npaug, thiab txhim kho qhov zoo ntawm kev tsim kho.

4. Kev siv thiab noj HEMC

Qhov ntau ntxiv uas pom zoo rau hauv cov tshuaj tsuag feem ntau yog 0.2% txog 0.6%, nyob ntawm cov mis, lub hom phiaj thiab kev ua tau zoo ntawm cov tshuaj tsuag. HEMC raug ntxiv rau cov tshuaj tsuag qhuav hauv daim ntawv ntawm cov hmoov qhuav, sib tov sib npaug nrog lwm cov khoom siv raw, thiab tom qab ntawd do nrog dej rau kev siv. Nws muaj cov solubility zoo heev, yooj yim rau disperse, tsis tsim agglomeration, thiab yooj yim rau kev tsim khoom lag luam thiab kev siv hauv tsev.

5. Piv txwv ntawm daim ntawv thov

Kev siv HEMC hauv cov tshuaj tsuag plastering phab ntsa sab nraud tuaj yeem ua rau phab ntsa tuab thiab lub peev xwm dai slurry ntawm cov tshuaj tsuag, thiab txo qhov poob hauv av ntawm kev tsim kho. Hauv cov tshuaj tsuag thermal insulation, HEMC txhim kho lub zog sib txuas ntawm cov khoom siv thiab txheej hauv paus, ua kom ntseeg tau tias qhov ruaj khov thiab ruaj khov ntawm lub kaw lus thermal insulation. Cov lus tawm tswv yim tiag tiag ntawm qhov project qhia tau hais tias cov tshuaj tsuag mortar nrog HEMC ntxiv yog qhov yooj yim rau kev tsim kho, qhov cuam tshuam yog du thiab mos, thiab qhov nrawm ntawm kev tsim kho rov ua dua raug txo qis.

Ua ib tug cellulose ether nrog kev ua tau zoo heev,hydroxyethyl methylcellulose ua lub luag haujlwm tseem ceeb hauv kev ua kom tuab, khaws dej, kev ruaj khov thiab kev pab txhawb nqa kev tsim kho hauv cov tshuaj tsuag, txhim kho qhov kev ua haujlwm txau tshuab thiab cov khoom tiav zoo ntawm cov tshuaj tsuag. Nrog rau kev txhawb nqa kev tsim kho tsev thiab kev tsim kho ntsuab, kev siv HEMC hauv kev ua haujlwm ntawm cov tshuaj tsuag premixed yuav dhau los ua ntau dua thiab dav dua, ua qhov tseem ceeb rau kev nce qib ntawm cov khoom siv hauv tsev.